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- Ion mobility spectrometry (9)
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- quantification (8)
- quasars: general (8)
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- recombination (8)
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- risk perception (8)
- rotation (8)
- sediment transport (8)
- sedimentary ancient DNA (8)
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- stars: emission-line, Be (8)
- sustainable development (8)
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- thermokarst (8)
- time series (8)
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- tracking (8)
- transition (8)
- treeline (8)
- trends (8)
- ultrafast (8)
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- ventral striatum (8)
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- vitamin A (8)
- von Humboldts Hand (8)
- wh-questions (8)
- work (8)
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- Öffentliche Verwaltung (8)
- Anisotropy (7)
- Anisotropy effect (7)
- Anpassung (7)
- Antike (7)
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- Astronomie (7)
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- Balance (7)
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- Weltbegriff (7)
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- academic achievement (7)
- acquisition (7)
- age of acquisition (7)
- aggregation (7)
- air pollution (7)
- algorithms (7)
- alignment (7)
- allostatic load (7)
- amino acids (7)
- amygdala (7)
- anthropometry (7)
- apoptosis (7)
- arctic (7)
- articulation (7)
- attitudes (7)
- augmented reality (7)
- autonomy (7)
- bias (7)
- binaries: eclipsing (7)
- biogenic amines (7)
- birth weight (7)
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- bystander (7)
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- circadian clock (7)
- circulation (7)
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- coherence (7)
- colonialism (7)
- community ecology (7)
- complexes (7)
- computer games (7)
- conversation analysis (7)
- corruption (7)
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- data (7)
- databases (7)
- defense (7)
- density (7)
- depressive symptoms (7)
- developmental dyscalculia (7)
- dietary patterns (7)
- digitale Medien (7)
- discrepancy principle (7)
- distribution (7)
- duplicate detection (7)
- dust (7)
- ecological modelling (7)
- ecosystem functioning (7)
- effectiveness (7)
- ensemble Kalman filter (7)
- enzyme (7)
- enzyme catalysis (7)
- ethics (7)
- ethnicity (7)
- eutrophication (7)
- exercise therapy (7)
- extinction (7)
- extraction (7)
- extreme rainfall (7)
- fiction (7)
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- first passage time (7)
- fiscal policy (7)
- flood (7)
- floodplain (7)
- flow (7)
- fluorescence correlation spectroscopy (7)
- food webs (7)
- function (7)
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- galaxies: abundances (7)
- gene flow (7)
- giving-up density (7)
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- heart (7)
- heterogeneous catalysis (7)
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- income (7)
- infrared: stars (7)
- institutions (7)
- insula (7)
- interoceptive awareness (7)
- isotopes (7)
- jumping (7)
- kardiologische Rehabilitation (7)
- kinematics (7)
- knowledge (7)
- land-use change (7)
- language contact (7)
- last glacial maximum (7)
- lipid metabolism (7)
- low-energy electrons (7)
- magnetism (7)
- meaning (7)
- mechanisms (7)
- media violence (7)
- memory retrieval (7)
- mental disorders (7)
- metaanalysis (7)
- metaphor (7)
- microbial ecology (7)
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- mixed methods (7)
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- orthography (7)
- oscillations (7)
- pH (7)
- palaeoecology (7)
- paleoecology (7)
- pandemic (7)
- parafoveal processing (7)
- parameter estimation (7)
- pathogens (7)
- perceptual span (7)
- perturbation (7)
- phase transition (7)
- phase transitions (7)
- phonological awareness (7)
- photoelectron spectroscopy (7)
- planetary nebulae: general (7)
- planets and satellites: rings (7)
- plyometric training (7)
- pollution (7)
- polyelectrolytes (7)
- porous materials (7)
- predator-prey dynamics (7)
- presidential government (7)
- preview benefit (7)
- production (7)
- programming (7)
- pronoun resolution (7)
- propensity score matching (7)
- prosodic boundary cues (7)
- proteasome (7)
- protection (7)
- public sector (7)
- pulsars: general (7)
- quality assurance (7)
- racism (7)
- radiocarbon (7)
- reduction (7)
- repair (7)
- retinol (7)
- rheology (7)
- roughness (7)
- scale development (7)
- scattering (7)
- screening (7)
- secular trend (7)
- seismic hazard (7)
- sensors (7)
- serotonin (7)
- shape-memory effect (7)
- sharing economy (7)
- silicon (7)
- size (7)
- soccer (7)
- social rejection (7)
- social support (7)
- socioeconomic status (7)
- software engineering (7)
- soil erosion (7)
- solar wind (7)
- sorption (7)
- spelling (7)
- stabile Isotope (7)
- standardization (7)
- stars: late-type (7)
- sunspots (7)
- support vector machine (7)
- surfactants (7)
- surveillance (7)
- tVNS (7)
- techniques: image processing (7)
- terrorism (7)
- thermoresponsiv (7)
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- tomato (7)
- tomography (7)
- trunk (7)
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- ultrafast dynamics (7)
- ultrasound (7)
- uplift (7)
- vesicles (7)
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- wh-in-situ (7)
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- world literature (7)
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- Ästhetik (7)
- 3D (6)
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- AFM (6)
- Adhäsion (6)
- Ageing (6)
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- Berühren (6)
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- Blockcopolymer (6)
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- Cystic fibrosis (6)
- Data assimilation (6)
- Deep learning (6)
- Dielektrophorese (6)
- Diskriminierung (6)
- Diskurs (6)
- Dynamic NMR (6)
- Dynamik (6)
- EEG/ERP (6)
- Electrical conductivity (6)
- Ellenberg indicator values (6)
- Emotions (6)
- Energy (6)
- Entzündung (6)
- Erinnerung (6)
- Ethik (6)
- European hare (6)
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- Fachwissen (6)
- Flood risk (6)
- Fluorescence spectroscopy (6)
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- Geschmack (6)
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- Optimierung (6)
- Oxygen heterocycles (6)
- PUFA (6)
- Paleoclimatology (6)
- Pavlovian-to-instrumental transfer (6)
- Peptid (6)
- Perception (6)
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- habitat use (5)
- hazard (5)
- heart failure (5)
- heart rate (5)
- height (5)
- hemoglobin amount (5)
- herbivory (5)
- heritage language (5)
- heteroatoms (5)
- heterosis (5)
- heuristics (5)
- high pressure (5)
- homeostasis (5)
- hospitals (5)
- hydrogen peroxide (5)
- hydrological modeling (5)
- hydrological modelling (5)
- hydropower (5)
- hydrothermal (5)
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- hyperspectral (5)
- hypochondriasis (5)
- hyporheic zone (5)
- ice-sheet (5)
- identity management (5)
- impulsivity (5)
- industry 4.0 (5)
- infection pathway (5)
- information (5)
- inheritance (5)
- inorganic perovskites (5)
- insects (5)
- institutional change (5)
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- integral field spectroscopy (5)
- inter-individual differences (5)
- interest (5)
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- intraspecific trait variation (5)
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- landscape (5)
- language comprehension (5)
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- laterality (5)
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- lexicon size (5)
- lifespan (5)
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- logic (5)
- long-term effects (5)
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- mechanical properties (5)
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- metal (5)
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- pathways (5)
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- 4 (4)
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- VIIRS DNB (4)
- Van Allen Probes (4)
- Vegetation change (4)
- Verfassungsrecht (4)
- Verhandlungen (4)
- Verification (4)
- Vernetzung (4)
- Vertrauen (4)
- Verwaltungswissenschaft (4)
- Videoanalyse (4)
- Virtualisierung (4)
- WA-PLS (4)
- Wasserhaushalt (4)
- Weight (4)
- Weight bias internalization (4)
- Weiterbildung (4)
- Wellenleiter (4)
- West Africa (4)
- West Antarctica (4)
- West Bohemia (4)
- Wetter (4)
- Wissen (4)
- Wissenschaft (4)
- Wissenssoziologie (4)
- Wissenstransfer (4)
- Wohlbefinden (4)
- Work ability (4)
- X-ray emission spectroscopy (4)
- X-ray scattering (4)
- X-rays (4)
- Xanthomonas (4)
- absorption (4)
- accretion (4)
- accretion, accretion disks (4)
- accuracy (4)
- achilles tendinopathy (4)
- action language (4)
- action processing (4)
- action words (4)
- actuation (4)
- adaptive force (4)
- additive particles (4)
- adherence (4)
- adipogenesis (4)
- adjectives (4)
- advanced dynamic flow (4)
- aerosol (4)
- affective (4)
- agency (4)
- agent-based model (4)
- agility (4)
- agreement attraction (4)
- aldehyde oxidase (4)
- allelopathy (4)
- amerikanische Reisetagebücher (4)
- anaphors (4)
- anisotropy (4)
- anorexia nervosa (4)
- antifouling (4)
- antilocality (4)
- aphids (4)
- aquatic ecosystems (4)
- aqueous-solution (4)
- arabidopsis (4)
- arabidopsis-thaliana (4)
- argumentation (4)
- arsenolipids present (4)
- artifical intelligence (4)
- astronomy (4)
- astrophysical plasmas (4)
- atherosclerosis (4)
- attachment (4)
- authenticity (4)
- authority (4)
- automatic evaluation (4)
- automatic evaluations (4)
- automation (4)
- autophagy (4)
- benchmark (4)
- bibliometrics (4)
- biodiversity exploratories (4)
- bioelectrocatalysis (4)
- biogenic amine (4)
- biogeochemistry (4)
- biological age (4)
- bis-MGD (4)
- black hole physics (4)
- body image (4)
- border (4)
- boundary layer (4)
- brushes (4)
- brushite (4)
- bulimia nervosa (4)
- bulk heterojunction (4)
- business (4)
- business model (4)
- business models (4)
- calcium carbonate (4)
- carbon isotopes (4)
- carbon nitrides (4)
- carbon pricing (4)
- cardiomyopathy (4)
- cartography (4)
- catchments (4)
- categories (4)
- cell cycle (4)
- cell migration (4)
- cell wall (4)
- cellular signalling (4)
- change management (4)
- charcoal (4)
- chronic pain (4)
- citizenship (4)
- civil society (4)
- civil war (4)
- climate adaptation (4)
- climate change impacts (4)
- climate extremes (4)
- clinical sample (4)
- clone (4)
- co-occurrence analysis (4)
- coating (4)
- cod-liver (4)
- coefficient (4)
- coercion (4)
- coevolution (4)
- cognitive enhancement (4)
- cognitive modeling (4)
- collaborative consumption (4)
- collagen (4)
- colonization (4)
- color (4)
- combat sports (4)
- common vole (4)
- community structure (4)
- competencies (4)
- compliance (4)
- computer-based training (4)
- conceptualization (4)
- concrete (4)
- conduct problems (4)
- conductivity (4)
- confidence (4)
- confocal microscopy (4)
- content areas (4)
- content knowledge (4)
- content-addressable memory (4)
- context (4)
- conversational agents (4)
- conversion (4)
- convolutional neural network (4)
- copper(II) (4)
- core (4)
- corpus linguistics (4)
- cosmic-ray neutron sensing (4)
- cosmology (4)
- covariance (4)
- creep (4)
- critical theory (4)
- crop (4)
- crop production (4)
- cross-cultural comparison (4)
- cross-curriculum (4)
- cross-national (4)
- crosslinking (4)
- crust (4)
- cultural identity (4)
- cultural pluralism (4)
- cyberbullying victimization (4)
- cylindrospermopsin (4)
- cystic fibrosis (4)
- cytochrome c (4)
- data mining (4)
- data preparation (4)
- data quality (4)
- data security (4)
- deep-sea (4)
- definition (4)
- deforestation (4)
- deformation (4)
- degenerative disc disease (4)
- deposition (4)
- diabetes mellitus (4)
- diachrony (4)
- diagnostic competence (4)
- diagnostics (4)
- dictator game (4)
- dictyostelium (4)
- digital (4)
- digital sovereignty (4)
- digitization (4)
- discourse production (4)
- diversification (4)
- dog (4)
- downscaling (4)
- dropout (4)
- drugs (4)
- drylands (4)
- dual-process (4)
- dyadic coping (4)
- dye (4)
- dye removal (4)
- dynamic capabilities (4)
- dynamical models (4)
- dynamical systems (4)
- eco-evolutionary experience (4)
- edge effect (4)
- effect (4)
- elections (4)
- electron microscopy (4)
- electron paramagnetic resonance (4)
- electron-transfer (4)
- electrostatics (4)
- elite athlete (4)
- emissions (4)
- emotional expression (4)
- emotional intelligence (4)
- empowerment (4)
- endophytes (4)
- endurance exercise (4)
- enhancement (4)
- entanglement (4)
- entrepreneurship education (4)
- environmental economics (4)
- environmental filtering (4)
- environmental policy (4)
- equifinality (4)
- errata, addenda (4)
- ethnic differences (4)
- ethnic identity (4)
- evaluative study (4)
- evaporites (4)
- event-related brain potentials (4)
- everyday life (4)
- evolutionary history (4)
- exchange (4)
- exercise intensity (4)
- expectations (4)
- experimental design (4)
- exploratory-behavior (4)
- eye-movement monitoring (4)
- face perception (4)
- fatty acid metabolism (4)
- fatty-acids (4)
- fault (4)
- faults (4)
- fence ecology (4)
- ferroelectrets (4)
- ferroelectric polymers (4)
- ferroelectricity (4)
- financial crisis (4)
- financial institutions (4)
- fire (4)
- first language acquisition (4)
- first-passage (4)
- fiscal federalism (4)
- floral scent (4)
- flower development (4)
- fluctuating light (4)
- fluid inclusions (4)
- focal adhesion (4)
- food neophilia (4)
- forest (4)
- formal verification (4)
- fractional dynamics (4)
- framework (4)
- frequency analysis (4)
- friendship (4)
- frustration (4)
- functional response (4)
- fundamental frequency (4)
- fungi (4)
- galaxies: fundamental parameters (4)
- galaxies: star formation (4)
- garden-path effect (4)
- gaze-contingent displays (4)
- gene regulatory networks (4)
- genealogy (4)
- genetic diversity (4)
- genome-wide association (4)
- geography (4)
- geomorphometry (4)
- geothermal (4)
- geothermal energy (4)
- glaciers (4)
- global jets (4)
- global positioning system (4)
- global sensitivity analysis (4)
- glomerular filtration rate (4)
- glucose oxidation (4)
- glucosinolates (4)
- glutathione (4)
- glycopolymers (4)
- grammaticalization (4)
- graph theory (4)
- graph transformation (4)
- graph transformation systems (4)
- graphs (4)
- ground-penetrating radar (4)
- group field theory (4)
- handgrip strength (4)
- handwriting (4)
- health care (4)
- healthcare (4)
- helical magnetic fields (4)
- hemocompatibility (4)
- heterostyly (4)
- high-intensity interval training (4)
- historiography (4)
- holding isometric muscle action (HIMA) (4)
- hormones (4)
- housing (4)
- human-computer interaction (4)
- hybrid (4)
- hybrid perovskites (4)
- hydrological models (4)
- hypoxia (4)
- imitation (4)
- immune system (4)
- immunoassay (4)
- immunology (4)
- implicit attitude (4)
- in vitro (4)
- in-service teacher training (4)
- in-situ (4)
- individual (4)
- inertial measurement unit (4)
- infinite-dimensional Brownian diffusion (4)
- infrastructure (4)
- institutional reform (4)
- insulin signaling (4)
- interactional linguistics (4)
- interception (4)
- interface (4)
- interference control (4)
- intergovernmental relations (4)
- international bureaucracies (4)
- international law (4)
- international organisations (4)
- international trade (4)
- internationale Beziehungen (4)
- internationaler Handel (4)
- intertextuality (4)
- intrusion detection (4)
- inverse analysis (4)
- ionic conductivity (4)
- ionic strength (4)
- job satisfaction (4)
- joint Simon effect (4)
- joint action (4)
- justice (4)
- karst (4)
- kernel methods (4)
- kidney (4)
- kidney transplantation (4)
- knickpoint (4)
- knowledge sharing (4)
- komplexe Systeme (4)
- körperliche Aktivität (4)
- lactate (4)
- land-use intensity (4)
- language change (4)
- large-scale structure of Universe (4)
- laser pulses (4)
- left periphery (4)
- lexical access (4)
- lexicon (4)
- lichens (4)
- life satisfaction (4)
- lifetime income (4)
- light variability (4)
- line: identification (4)
- linear hypersubstitution (4)
- linear mixed models (4)
- lipidomics (4)
- literacy acquisition (4)
- loading rate (4)
- local time (4)
- locomotion (4)
- locus coeruleus (4)
- low-back-pain (4)
- lower critical solution temperature (4)
- lutein (4)
- lutherische Theologie (4)
- machine (4)
- macrocycles (4)
- magnetostriction (4)
- magnetotellurics (4)
- mammals (4)
- manufacturing (4)
- mass (4)
- mathematics education (4)
- mathematics instruction (4)
- meadow (4)
- measurement invariance (4)
- mechanical tendinous oscillations (4)
- media education (4)
- media use (4)
- memory effects (4)
- mesenchymal stem cells (4)
- mesoporous materials (4)
- metabolic engineering (4)
- metabolic regulation (4)
- metabolite (4)
- metadata (4)
- metagenomics (4)
- meteorological drought (4)
- methanogenic archaea (4)
- methods: statistical (4)
- methyl orange (4)
- methylene blue (4)
- methylmercury (4)
- miRNAs (4)
- micro-CT (4)
- microRNA (4)
- microlensing (4)
- mid-temperature transition (4)
- mild cognitive impairment (4)
- mitochondrial DNA (4)
- mitosis (4)
- mixtures (4)
- mobile links (4)
- modular production (4)
- molecular evolution (4)
- molecules (4)
- moment tensor (4)
- monoclonal antibody (4)
- mood (4)
- morality (4)
- morphogenesis (4)
- motivational interviewing (4)
- mowing (4)
- multi-level system (4)
- multilevel analysis (4)
- multivariate statistics (4)
- muscle oxygen saturation (4)
- music information retrieval (4)
- n-alkanes (4)
- nachhaltige Chemie (4)
- nanolenses (4)
- nanotriangles (4)
- national identity (4)
- naturalism (4)
- nature conservation (4)
- nested graph conditions (4)
- network reconstruction (4)
- neurodegenerative diseases (4)
- neuroenhancement (4)
- neuronal networks (4)
- neuroscience (4)
- neurotoxicity (4)
- neutrinos (4)
- new species (4)
- new technology (4)
- next generation sequencing (NGS) (4)
- nominalization (4)
- non-alcoholic fatty liver disease (4)
- non-linear dynamics (4)
- non-native speakers (4)
- non-photorealistic rendering (4)
- non-state actors (4)
- nonlinear operator (4)
- noun (4)
- numerical (4)
- numerical model (4)
- ocean (4)
- ocean acidification (4)
- ocean color remote sensing (4)
- online course creation (4)
- online course design (4)
- online discrimination (4)
- online learning (4)
- ontogeny (4)
- open data (4)
- open-circuit voltage (4)
- optimal foraging (4)
- optimal transport (4)
- organic carbon (4)
- organische Chemie (4)
- organische Halbleiter (4)
- osmotic-pressure (4)
- osteoblast (4)
- other-race effect (4)
- outcomes (4)
- paleoaltimetry (4)
- paleoclimatology (4)
- paleogenomics (4)
- paleolimnology (4)
- part 1 (4)
- partial clone (4)
- partial least squares (4)
- particle acceleration (4)
- particles (4)
- parties (4)
- pathway (4)
- peace (4)
- peacekeeping (4)
- people (4)
- performance information (4)
- performance management (4)
- performance measurement (4)
- permafrost thaw (4)
- persulfide (4)
- phase dynamics (4)
- phase oscillators (4)
- phenols (4)
- phenotyping (4)
- phosphatidylserine (4)
- phospholipids (4)
- photoelectron (4)
- photofragmentation (4)
- photogrammetry (4)
- photoisomerization (4)
- photooxygenation (4)
- phototaxis (4)
- photovoltaic devices (4)
- physiological consequences (4)
- phytolith (4)
- picture-word interference (4)
- planetary rings (4)
- planets and satellites: atmospheres (4)
- plant cell wall (4)
- plant development (4)
- plant growth (4)
- plant population and community dynamics (4)
- plasma membrane (4)
- platelets (4)
- playa (4)
- plume (4)
- pluvial flooding (4)
- pneumonia (4)
- point process (4)
- point-of-care (4)
- policy analysis (4)
- policy-making (4)
- political ideology (4)
- pollination (4)
- poly(ethylene glycol) (4)
- polyelectrolyte adsorption (4)
- polypropylene (4)
- polysemy (4)
- polysulfobetaine (4)
- population structure (4)
- poröse Materialien (4)
- power spectral analysis (4)
- pragmaticalisation (4)
- pre-school (4)
- preactivation (4)
- precision agriculture (4)
- precuneus (4)
- precursor (4)
- preference assessment (4)
- preschool children (4)
- primary care (4)
- principal component analysis (4)
- privatization (4)
- proactive aggression (4)
- proactivity (4)
- probabilistic timed systems (4)
- process (4)
- properties (4)
- protein engineering (4)
- proteinuria (4)
- proteome (4)
- psychological distress (4)
- psychosocial moderators (4)
- psychotherapeutic competencies (4)
- pubertal timing (4)
- public policy (4)
- qualitative Analyse (4)
- qualitative content analysis (4)
- qualitative research (4)
- quantum gravity (4)
- quorum sensing (4)
- radicals (4)
- random point processes (4)
- random walk (4)
- random walks (4)
- ranking (4)
- rape myth acceptance (4)
- rate of perceived exertion (4)
- rationalism (4)
- reactive aggression (4)
- reading motivation (4)
- real-time (4)
- receptor (4)
- recollection (4)
- recombinant inbred line (4)
- recurrence (4)
- recurrence plot (4)
- redox (4)
- redox state (4)
- reference (4)
- reforms (4)
- regime shift (4)
- regression (4)
- regularity (4)
- relatedness (4)
- relation historique (4)
- religiosity (4)
- remagnetization (4)
- replication (4)
- reproductive strategies (4)
- requirements (4)
- research (4)
- research data management (4)
- research design (4)
- research school (4)
- resistin (4)
- reward anticipation (4)
- rifting (4)
- risk perceptions (4)
- risk reduction (4)
- river incision (4)
- robustness (4)
- rolling averages (4)
- root traits (4)
- rotifer (4)
- run time analysis (4)
- runners (4)
- saliva (4)
- salivary alpha-amylase (4)
- salt (4)
- salt pan (4)
- sanctions (4)
- sarcopenia (4)
- scaffolding (4)
- scenario analysis (4)
- school adjustment (4)
- school children (4)
- school mathematics (4)
- sea level (4)
- secondary school (4)
- sedimentology (4)
- self-control (4)
- self-objectification (4)
- self-regulated learning (4)
- self-sovereign identity (4)
- selfing syndrome (4)
- sensor (4)
- sensorimotor training (4)
- sentence reading (4)
- sequence (4)
- sexual assault (4)
- sexual coercion (4)
- sexual selection (4)
- sexual victimization (4)
- sexual violence (4)
- sexuality (4)
- sexualization (4)
- shape (4)
- shape memory (4)
- shrub encroachment (4)
- sick leave (4)
- signal propagation (4)
- similarity measures (4)
- single nucleotide polymorphism (4)
- single-case experimental design (4)
- skill (4)
- skin (4)
- slumming (4)
- small mammals (4)
- smartphone (4)
- social capital (4)
- social participation (4)
- social status (4)
- sociality (4)
- sociolinguistics (4)
- soils (4)
- solute transport (4)
- soziale Ungleichheit (4)
- space use (4)
- spatial (4)
- special educational needs (4)
- species distribution model (4)
- species distribution modelling (4)
- specific language impairment (4)
- specific root length (4)
- spectral analysis (4)
- speech and language therapy (4)
- speech segmentation (4)
- sport (4)
- stakeholder participation (4)
- stars: black holes (4)
- stars: distances (4)
- stars: low-mass (4)
- stars: oscillations (4)
- starspots (4)
- start-up subsidies (4)
- states (4)
- statins (4)
- statistical mechanics (4)
- statistical seismology (4)
- stellar physics (4)
- sterols (4)
- stochastic analysis (4)
- stochastic process (4)
- storage (4)
- strain (4)
- strain localization (4)
- stress response (4)
- stress tolerance (4)
- subdiffusion (4)
- subjective well-being (4)
- subsidence (4)
- substance use (4)
- sucrose responsiveness (4)
- summer monsoon (4)
- supercapacitors (4)
- supergene (4)
- supernova remnants (4)
- supervisor support (4)
- survey experiment (4)
- sustainable chemistry (4)
- symbiosis (4)
- synthetische Biologie (4)
- systems theory (4)
- talent (4)
- tandem solar cells (4)
- tasks (4)
- taxation (4)
- teacher beliefs (4)
- teacher learning (4)
- teacher professional development (4)
- technology acceptance (4)
- territorial reforms (4)
- test (4)
- theoretische Chemie (4)
- thermal (4)
- thermodynamische Stabilität (4)
- thermokarst lakes (4)
- thiouracil (4)
- tocopherols (4)
- township tourism (4)
- trace elements (4)
- trade (4)
- transcutaneous vagus nerve stimulation (4)
- transparency (4)
- travel literature (4)
- treatment (4)
- trustworthiness (4)
- tuition fees (4)
- ultrafast x-ray diffraction (4)
- ungulate (4)
- value creation (4)
- vascular plants (4)
- verbs (4)
- vertical coupling (4)
- veterinary cordon fence (4)
- victim (4)
- video games (4)
- virtual machines (4)
- virus infection (4)
- viscoelasticity (4)
- viscosity (4)
- visible-light (4)
- visual attention (4)
- vocabulary (4)
- vocational education (4)
- voice (4)
- vowels (4)
- water fluxes (4)
- water security (4)
- water treatment (4)
- water-balance (4)
- water-soluble polymers (4)
- wave-particle interactions (4)
- wavelength (4)
- weak ergodicity breaking (4)
- weighted moving averages (4)
- wettability (4)
- wh-movement (4)
- willingness to intervene (4)
- working memory updating (4)
- yedoma (4)
- youth athletes (4)
- zebularine (4)
- Öffentliche Unternehmen (4)
- Öffentlicher Dienst (4)
- 1800 (3)
- 1804 (3)
- 1970s (3)
- 2D (3)
- 2D perovskites (3)
- 2nd-language grammar (3)
- 3D Point Clouds (3)
- 3D city models (3)
- 3D geovisualization (3)
- 3D modeling (3)
- 4-nitrophenol (3)
- 5-methoxycarbonylmethyl-2-thiouridine (3)
- ABCB7 (3)
- AGN (3)
- AHP (3)
- AUD (3)
- Abandonment (3)
- Abbau (3)
- Abolitionismus (3)
- Abscisic acid (3)
- Acacia mellifera (3)
- Acer pseudoplatanus (3)
- Achilles and patellar tendon (3)
- Acid sphingomyelinase (3)
- Acidification (3)
- Acquisition (3)
- Action processing (3)
- Acute coronary syndrome (3)
- Adam Smith (3)
- Additive manufacturing (3)
- Adult education (3)
- Aerosole (3)
- AfD (3)
- Affective Computing (3)
- Affekt (3)
- Afghanistan (3)
- African indigenous vegetables (3)
- Age (3)
- Agile (3)
- Agilität (3)
- Agrammatic aphasia (3)
- Agrarwissenschaft (3)
- Agreement (3)
- Agricultural landscape (3)
- Aktivität (3)
- Alborz Mountains (3)
- Aldehyde oxidase (3)
- Aldehyde oxidoreductase (3)
- Aleatory variability (3)
- Alkylpyridinium salts (3)
- Allgemeiner Teil (3)
- Alltag (3)
- Alpine Fault (3)
- Alte Geschichte (3)
- Aluminum alloys (3)
- Ambiguity (3)
- Amides (3)
- Amphibia (3)
- Amplicon sequencing (3)
- Analyse (3)
- Analytics (3)
- Ancient forest (3)
- Angst (3)
- Ankle injury (3)
- Anomalous diffusion (3)
- Anthropometrie (3)
- Anti-doping guideline (3)
- Anti-doping program (3)
- Antibiotic resistance (3)
- Antibiotics (3)
- Antifouling (3)
- Aphis fabae (3)
- App (3)
- Approximate Bayesian Computation (3)
- Arabica coffee beans (3)
- Aral Sea (3)
- Arbeitslosigkeit (3)
- Arbeitsverhalten (3)
- Architektur (3)
- Arctic Ocean (3)
- Arctic haze (3)
- Arctic tundra (3)
- Array seismology (3)
- Artificial intelligence (3)
- Asian American (3)
- Asie Centrale (3)
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- Aspekt (3)
- Asplanchna brightwellii (3)
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- Astrophotonik (3)
- Astrophysics (3)
- Athletes (3)
- Atlantic-Ocean (3)
- Attitude (3)
- Auger electron spectroscopy (3)
- Augmented Reality (3)
- August 2002 flood (3)
- Ausbildung (3)
- Ausdehnungslehre (3)
- Auslandseinsätze (3)
- Autismus (3)
- Automatisierung (3)
- Autonomie (3)
- Auxin transport (3)
- Avantgarde (3)
- Azobenzen (3)
- Azobenzene containing cationic surfactants (3)
- BIAT (3)
- BIM (3)
- BL Lacertae objects: individual: Mrk 421 (3)
- BL Lacertae objects: individual: PKS 2155-304 (3)
- BRD (3)
- Bacteriophage (3)
- Barents Sea (3)
- Base pairing (3)
- Baseline shift (3)
- Bayesian estimation (3)
- Bayesian inverse problems (3)
- Bayesian meta-analysis (3)
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- Bayesianism (3)
- Be-10 (3)
- Bedeutung (3)
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- Behaviour (3)
- Belarus (3)
- Belastung (3)
- Belgien (3)
- Belgium (3)
- Benchmarking (3)
- Benetzung (3)
- Benzene (3)
- Beringia (3)
- Berufswahl (3)
- Betriebssysteme (3)
- Bibliographie der selbstständigen Schriften (3)
- Bibliometric analysis (3)
- Big data (3)
- Bildungstechnologien (3)
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- Bildwissenschaft (3)
- Bilingualismus (3)
- Bilophila wadsworthia (3)
- Bioavailability (3)
- Biochemie (3)
- Biofilme (3)
- Biogenic silica (3)
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- gradient flow (3)
- grain-size distribution (3)
- grammatical illusion (3)
- granite (3)
- granitoids (3)
- graph constraints (3)
- graphite (3)
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- grassland (3)
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- green (3)
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- grouping (3)
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- hemispheric asymmetry (3)
- heritage speakers (3)
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- heterotrophic bacteria (3)
- hierarchical clustering (3)
- high temperature (3)
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- hip (3)
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- hypothesis (3)
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- image (3)
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- imidazolium (3)
- immigrants (3)
- impact assessment (3)
- impedance spectroscopy (3)
- implementation (3)
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- implizit (3)
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- inbreeding depression (3)
- incision (3)
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- incremental graph pattern matching (3)
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- infant (3)
- inferences (3)
- infiltration (3)
- inflectional morphology (3)
- informatics (3)
- information integration (3)
- infrared: diffuse background (3)
- injection (3)
- inner magnetosphere (3)
- inorganic chemistry (3)
- input frequency (3)
- institutional interplay (3)
- instrumental variables (3)
- intensification (3)
- intercultural competence (3)
- interface engineering (3)
- interfacial recombination (3)
- interferometry (3)
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- interindividual differences (3)
- interleukin-8 (3)
- intermediate disturbance hypothesis (3)
- intermolecular interactions (3)
- internalization (3)
- international (3)
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- intervention locality (3)
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- interview study (3)
- intonation units (3)
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- iterative regularization (3)
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- kana (3)
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- kinetic instabilities (3)
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- kollektives Gedächtnis (3)
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- komplexes Netzwerk (3)
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- l-cysteine desulfurase (3)
- labeling (3)
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- land management (3)
- land-use (3)
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- langevin equation (3)
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- leaf (3)
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- leaking (3)
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- learning factories (3)
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- literatures of the world (3)
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- lower (3)
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- method (3)
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- migrants (3)
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- modal verbs (3)
- modality compatibility (3)
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- relaxation (3)
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- reservoir (3)
- resolution (3)
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- self-organisation (3)
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- semantic (3)
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- sensor data (3)
- sensorimotor control (3)
- sentence parsing (3)
- separation (3)
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- serine cycle (3)
- serum (3)
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- sexual self-esteem (3)
- shadow education (3)
- shallow structure hypothesis (3)
- shape-memory polymer (3)
- short-read mapping (3)
- sibilant (3)
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- signalling (3)
- similarity (3)
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- simulation model (3)
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- sin (3)
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- stoichiometry (3)
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- tablet (3)
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- timing (3)
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- university teaching (3)
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- upper mantle (3)
- use (3)
- user interaction (3)
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Institute
- Institut für Biochemie und Biologie (5426)
- Institut für Physik und Astronomie (5314)
- Institut für Geowissenschaften (3633)
- Institut für Chemie (3403)
- Wirtschaftswissenschaften (2487)
- Department Psychologie (2221)
- Historisches Institut (2078)
- Sozialwissenschaften (1838)
- Institut für Mathematik (1819)
- Institut für Romanistik (1762)
Èto-clefts are Russian focus constructions with the demonstrative pronoun èto ‘this’ at the beginning: “Èto Mark vyigral gonku” (“It was Mark who won the race”). They are often being compared with English it-clefts, German es-clefts, as well as the corresponding focus-background structures in other languages.
In terms of semantics, èto-clefts have two important properties which are cross-linguistically typical for clefts: existence presupposition (“Someone won the race”) and exhaustivity (“Nobody except Mark won the race”). However, the exhaustivity effects are not as strong as exhaustivity effects in structures with the exclusive only and require more research.
At the same time, the question if the syntactic structure of èto-clefts matches the biclausal structure of English and German clefts, remains open. There are arguments in favor of biclausality, as well as monoclausality. Besides, there is no consistency regarding the status of èto itself.
Finally, the information structure of èto-clefts has remained underexplored in the existing literature.
This research investigates the information-structural, syntactic, and semantic properties of Russian clefts, both theoretically (supported by examples from Russian text corpora and judgments from native speakers) and experimentally. It is determined which desired changes in the information structure motivate native speakers to choose an èto-cleft and not the canonical structure or other focus realization tools. Novel syntactic tests are conducted to find evidence for bi-/monoclausality of èto-clefts, as well as for base-generation or movement of the cleft pivot. It is hypothesized that èto has a certain important function in clefts, and its status is investigated. Finally, new experiments on the nature of exhaustivity in èto-clefts are conducted. They allow for direct cross-linguistic comparison, using an incremental-information paradigm with truth-value judgments.
In terms of information structure, this research makes a new proposal that presents èto-clefts as structures with an inherent focus-background bipartitioning. Even though èto-clefts are used in typical focus contexts, evidence was found that èto-clefts (as well as Russian thetic clefts) allow for both new information focus and contrastive focus. Èto-clefts are pragmatically acceptable when a singleton answer to the implied question is expected (e.g. “It was Mark who won the race” but not “It was Mark who came to the party”). Importantly, èto in Russian clefts is neither dummy, nor redundant, but is a topic expression; conveys familiarity which triggers existence presupposition; refers to an instantiated event, or a known/perceivable situation; finally, èto plays an important role in the spoken language as a tool for speech coherency and a focus marker.
In terms of syntax, this research makes a new monoclausal proposal and shows evidence that the cleft pivot undergoes movement to the left peripheral position. Èto is proposed to be TopP.
Finally, in terms of semantics, a novel cross-linguistic evaluation of Russian clefts is made. Experiments show that the exhaustivity inference in èto-clefts is not robust. Participants used different strategies in resolving exhaustivity, falling into 2 groups: one group considered èto-clefts exhaustive, while another group considered them non-exhaustive. Hence, there is evidence for the pragmatic nature of exhaustivity in èto-clefts. The experimental results for èto-clefts are similar to the experimental results for clefts in German, French and Akan. It is concluded that speakers use different tools available in their languages to produce structures with similar interpretive properties.
The present dissertation investigates changes in lingual coarticulation across childhood in German-speaking children from three to nine years of age and adults. Coarticulation refers to the mismatch between the abstract phonological units and their seemingly commingled realization in continuous speech. Being a process at the intersection of phonology and phonetics, addressing its changes across childhood allows for insights in speech motor as well as phonological developments. Because specific predictions for changes in coarticulation across childhood can be derived from existing speech production models, investigating children’s coarticulatory patterns can help us model human speech production.
While coarticulatory changes may shed light on some of the central questions of speech production development, previous studies on the topic were sparse and presented a puzzling picture of conflicting findings. One of the reasons for this lack is the difficulty in articulatory data acquisition in a young population. Within the research program this dissertation is embedded in, we accepted this challenge and successfully set up the hitherto largest corpus of articulatory data from children using ultrasound tongue imaging. In contrast to earlier studies, a high number of participants in tight age cohorts across a wide age range and a thoroughly controlled set of pseudowords allowed for statistically powerful investigations of a process known as variable and complicated to track.
The specific focus of my studies is on lingual vocalic coarticulation as measured in the horizontal position of the highest point of the tongue dorsum. Based on three studies on a) anticipatory coarticulation towards the left, b) carryover coarticulation towards the right side of the utterance, and c) anticipatory coarticulatory extent in repeated versus read aloud speech, I deduct the following main theses:
1. Maturing speech motor control is responsible for some developmental changes in coarticulation.
2. Coarticulation can be modeled as the coproduction of articulatory gestures.
3. The developmental change in coarticulation results from a decrease of vocalic activation width.
Beerdigen oder verbrennen?
(2024)
This paper provides novel evidence on the impact of public transport subsidies on air pollution. We obtain causal estimates by leveraging a unique policy intervention in Germany that temporarily reduced nationwide prices for regional public transport to a monthly flat rate price of 9 Euros. Using DiD estimation strategies on air pollutant data, we show that this intervention causally reduced a benchmark air pollution index by more than eight percent and, after its termination, increased again. Our results illustrate that public transport subsidies – especially in the context of spatially constrained cities – offer a viable alternative for policymakers and city planers to improve air quality, which has been shown to crucially affect health outcomes.
With the many challenges facing the agricultural system, such as water scarcity, loss of arable land due to climate change, population growth, urbanization or trade disruptions, new agri-food systems are needed to ensure food security in the future. In addition, healthy diets are needed to combat non-communicable diseases. Therefore, plant-based diets rich in health-promoting plant secondary metabolites are desirable. A saline indoor farming system is representing a sustainable and resilient new agrifood system and can preserve valuable fresh water. Since indoor farming relies on artificial lighting, assessment of lighting conditions is essential. In this thesis, the cultivation of halophytes in a saline indoor farming system was evaluated and the influence of cultivation conditions were assessed in favor of improving the nutritional quality of halophytes for human consumption. Therefore, five selected edible halophyte species (Brassica oleracea var. palmifolia, Cochlearia officinalis, Atriplex hortensis, Chenopodium quinoa, and Salicornia europaea) were cultivated in saline indoor farming. The halophyte species were selected for to their salt tolerance levels and mechanisms. First, the suitability of halophytes for saline indoor farming and the influence of salinity on their nutritional properties, e.g. plant secondary metabolites and minerals, were investigated. Changes in plant performance and nutritional properties were observed as a function of salinity. The response to salinity was found to be species-specific and related to the salt tolerance mechanism of the halophytes. At their optimal salinity levels, the halophytes showed improved carotenoid content. In addition, a negative correlation was found between the nitrate and chloride content of halophytes as a function of salinity. Since chloride and nitrate can be antinutrient compounds, depending on their content, monitoring is essential, especially in halophytes. Second, regional brine water was introduced as an alternative saline water resource in the saline indoor farming system. Brine water was shown to be feasible for saline indoor farming
of halophytes, as there was no adverse effect on growth or nutritional properties, e.g. carotenoids. Carotenoids were shown to be less affected by salt composition than by salt concentration. In addition, the interaction between the salinity and the light regime in indoor farming and greenhouse cultivation has been studied. There it was shown that interacting light regime and salinity alters the content of carotenoids and chlorophylls. Further, glucosinolate and nitrate content were also shown to be influenced by light regime. Finally, the influence of UVB light on halophytes was investigated using supplemental narrow-band UVB LEDs. It was shown that UVB light affects the growth, phenotype and metabolite profile of halophytes and that the UVB response is species specific. Furthermore, a modulation of carotenoid content in S. europaea could be achieved to enhance health-promoting properties and thus improve nutritional quality. This was shown to be dose-dependent and the underlying mechanisms of carotenoid accumulation were also investigated. Here it was revealed that carotenoid accumulation is related to oxidative stress.
In conclusion, this work demonstrated the potential of halophytes as alternative vegetables produced in a saline indoor farming system for future diets that could contribute to ensuring food security in the future. To improve the sustainability of the saline indoor farming system, LED lamps and regional brine water could be integrated into the system. Since the nutritional properties have been shown to be influenced by salt, light regime and UVB light, these abiotic stressors must be taken into account when considering halophytes as alternative vegetables for human nutrition.
The urban heat island (UHI) effect, describing an elevated temperature of urban areas compared with their natural surroundings, can expose urban dwellers to additional heat stress, especially during hot summer days. A comprehensive understanding of the UHI dynamics along with urbanization is of great importance to efficient heat stress mitigation strategies towards sustainable urban development. This is, however, still challenging due to the difficulties of isolating the influences of various contributing factors that interact with each other. In this work, I present a systematical and quantitative analysis of how urban intrinsic properties (e.g., urban size, density, and morphology) influence UHI intensity.
To this end, we innovatively combine urban growth modelling and urban climate simulation to separate the influence of urban intrinsic factors from that of background climate, so as to focus on the impact of urbanization on the UHI effect. The urban climate model can create a laboratory environment which makes it possible to conduct controlled experiments to separate the influences from different driving factors, while the urban growth model provides detailed 3D structures that can be then parameterized into different urban development scenarios tailored for these experiments. The novelty in the methodology and experiment design leads to the following achievements of our work.
First, we develop a stochastic gravitational urban growth model that can generate 3D structures varying in size, morphology, compactness, and density gradient. We compare various characteristics, like fractal dimensions (box-counting, area-perimeter scaling, area-population scaling, etc.), and radial gradient profiles of land use share and population density, against those of real-world cities from empirical studies. The model shows the capability of creating 3D structures resembling real-world cities. This model can generate 3D structure samples for controlled experiments to assess the influence of some urban intrinsic properties in question. [Chapter 2]
With the generated 3D structures, we run several series of simulations with urban structures varying in properties like size, density and morphology, under the same weather conditions. Analyzing how the 2m air temperature based canopy layer urban heat island (CUHI) intensity varies in response to the changes of the considered urban factors, we find the CUHI intensity of a city is directly related to the built-up density and an amplifying effect that urban sites have on each other. We propose a Gravitational Urban Morphology (GUM) indicator to capture the neighbourhood warming effect. We build a regression model to estimate the CUHI intensity based on urban size, urban gross building volume, and the GUM indicator. Taking the Berlin area as an example, we show the regression model capable of predicting the CUHI intensity under various urban development scenarios. [Chapter 3]
Based on the multi-annual average summer surface urban heat island (SUHI) intensity derived from Land surface temperature, we further study how urban intrinsic factors influence the SUHI effect of the 5,000 largest urban clusters in Europe. We find a similar 3D GUM indicator to be an effective predictor of the SUHI intensity of these European cities. Together with other urban factors (vegetation condition, elevation, water coverage), we build different multivariate linear regression models and a climate space based Geographically Weighted Regression (GWR) model that can better predict SUHI intensity. By investigating the roles background climate factors play in modulating the coefficients of the GWR model, we extend the multivariate linear model to a nonlinear one by integrating some climate parameters, such as the average of daily maximal temperature and latitude. This makes it applicable across a range of background climates. The nonlinear model outperforms linear models in SUHI assessment as it captures the interaction of urban factors and the background climate. [Chapter 4]
Our work reiterates the essential roles of urban density and morphology in shaping the urban thermal environment. In contrast to many previous studies that link bigger cities with higher UHI intensity, we show that cities larger in the area do not necessarily experience a stronger UHI effect. In addition, the results extend our knowledge by demonstrating the influence of urban 3D morphology on the UHI effect. This underlines the importance of inspecting cities as a whole from the 3D perspective. While urban 3D morphology is an aggregated feature of small-scale urban elements, the influence it has on the city-scale UHI intensity cannot simply be scaled up from that of its neighbourhood-scale components. The spatial composition and configuration of urban elements both need to be captured when quantifying urban 3D morphology as nearby neighbourhoods also cast influences on each other. Our model serves as a useful UHI assessment tool for the quantitative comparison of urban intervention/development scenarios. It can support harnessing the capacity of UHI mitigation through optimizing urban morphology, with the potential of integrating climate change into heat mitigation strategies.
Leadership plays an important role for the efficient and fair solution of social dilemmas but the effectiveness of a leader can vary substantially. Two main factors of leadership impact are the ability to induce high contributions by all group members and the (expected) fair use of power. Participants in our experiment decide about contributions to a public good. After all contributions are made, the leader can choose how much of the joint earnings to assign to herself; the remainder is distributed equally among the followers. Using machine learning techniques, we study whether the content of initial open statements by the group members predicts their behavior as a leader and whether groups are able to identify such clues and endogenously appoint a “good” leader to solve the dilemma. We find that leaders who promise fairness are more likely to behave fairly, and that followers appoint as leaders those who write more explicitly about fairness and efficiency. However, in their contribution decision, followers focus on the leader’s first-move contribution and place less importance on the content of the leader’s statements.
Access to digital finance
(2024)
Financing entrepreneurship spurs innovation and economic growth. Digital financial platforms that crowdfund equity for entrepreneurs have emerged globally, yet they remain poorly understood. We model equity crowdfunding in terms of the relationship between the number of investors and the amount of money raised per pitch. We examine heterogeneity in the average amount raised per pitch that is associated with differences across three countries and seven platforms. Using a novel dataset of successful fundraising on the most prominent platforms in the UK, Germany, and the USA, we find the underlying relationship between the number of investors and the amount of money raised for entrepreneurs is loglinear, with a coefficient less than one and concave to the origin. We identify significant variation in the average amount invested in each pitch across countries and platforms. Our findings have implications for market actors as well as regulators who set competitive frameworks.
Ausgehend von der Beobachtung, dass die aktuelle Digitalisierungsforschung die Ambivalenz der Digitalisierung zwar erkennt, aber nicht zum Gegenstand ihrer Analysen macht, fokussiert die vorliegende kumulative Dissertation auf die ambivalente Dichotomie aus Potenzialen und Problemen, die mit digitalen Transformationen von Organisationen einhergeht. Entlang von sechs Publikationen wird mit einem systemtheoretischen Blick auf Organisationen die spannungsvolle Dichotomie hinsichtlich dreier ambivalenter Verhältnisse aufgezeigt: Erstens wird in Bezug auf das Verhältnis von Digitalisierung und Postbürokratie deutlich, dass digitale Transformationen das Potenzial aufweisen, postbürokratische Arbeitsweisen zu erleichtern. Parallel ergibt sich das Problem, dass auf Konsens basierende postbürokratische Strukturen Digitalisierungsinitiativen erschweren, da diese auf eine Vielzahl von Entscheidungen angewiesen sind. Zweitens zeigt sich mit Blick auf das ambivalente Verhältnis von Digitalisierung und Vernetzung, dass einerseits organisationsweite Kooperation ermöglicht wird, während sich andererseits die Gefahr digitaler Widerspruchskommunikation auftut. Beim dritten Verhältnis zwischen Digitalisierung und Gender deutet sich das mit neuen digitalen Technologien einhergehende Potenzial für Gender Inklusion an, während zugleich das Problem einprogrammierter Gender Biases auftritt, die Diskriminierungen oftmals verschärfen. Durch die Gegenüberstellung der Potenziale und Probleme wird nicht nur die Ambivalenz organisationaler Digitalisierung analysierbar und verständlich, es stellt sich auch heraus, dass mit digitalen Transformationen einen doppelte Formalisierung einhergeht: Organisationen werden nicht nur mit den für Reformen üblichen Anpassungen der formalen Strukturen konfrontiert, sondern müssen zusätzlich formale Entscheidungen zu Technikeinführung und -beibehaltung treffen sowie formale Lösungen etablieren, um auf unvorhergesehene Potenziale und Probleme reagieren. Das Ziel der Dissertation ist es, eine analytisch generalisierte Heuristik an die Hand zu geben, mit deren Hilfe die Errungenschaften und Chancen digitaler Transformationen identifiziert werden können, während sich parallel ihr Verhältnis zu den gleichzeitig entstehenden Herausforderungen und Folgeproblemen erklären lässt.
Die Beschaffung von Leistungen zur medizinischen Rehabilitation wurde durch den neuen § 15 SGB VI zum 1. Juli 2023 grundlegend reformiert. Seither gilt ein mehrstufiges System aus Zulassung der Rehabilitationskliniken, Belegungsvertrag, Belegungsentscheidung und Vergütung. Sämtliche Beschaffungsstufen werden von der DRV Bund durch verbindliche Entscheidungen gesteuert.
Dieses neue Beschaffungssystem verstößt gegen das Wettbewerbsrecht der Europäischen Union und ist deshalb unwirksam. Das Unionsrecht (Art. 106 Abs. 1 AEUV), aber auch das nationale Kartellrecht (§ 19 Abs. 2 Nr. 1 GWB) und das Verfassungsrecht (Art. 12 Abs. 1 GG) verlangen eine Trennung von hoheitlichen Befugnissen und unternehmerischen Funktionen der Rentenversicherungsträger. Anderenfalls ist die gebotene Gleichbehandlung (Nichtdiskriminierung) der Rehabilitationskliniken freigemeinnütziger und privater Träger mit den Rehabilitationskliniken der Rentenversicherungsträger bei der Erbringung von Leistungen zur medizinischen Rehabilitation nicht gewährleistet.
Dieses Trennungsprinzip ist verletzt. Denn die Rentenversicherungsträger nehmen hoheitliche Zulassungs-, Belegungs- und Vergütungsaufgaben wahr und sind gleichzeitig unternehmerisch mit eigenen Rehabilitationseinrichtungen auf dem Markt der Erbringung von Leistungen zur medizinischen Rehabilitation tätig. Freigemeinnützige und private Rehabilitationskliniken werden auf allen Stufen der Beschaffung gegenüber den Kliniken der Rentenversicherungsträger diskriminiert. Das gilt insbesondere für die Belegungsentscheidungen der Rentenversicherungsträger, weil hierdurch systematisch eigene Kliniken gegenüber freigemeinnützigen und privaten Kliniken begünstigt werden.
Nils-Hendrik Grohmann beschäftigt sich mit dem noch andauernden Stärkungsprozess der UN-Menschenrechtsvertragsorgane. Er analysiert, welche rechtlichen Befugnisse die Ausschüsse haben, ob sie von sich aus Vorschläge einbringen können und inwieweit sie ihre Verfahrensweisen bisher aufeinander abgestimmt haben. Ein weiterer Schwerpunkt liegt auf der Zusammenarbeit zwischen den verschiedenen Ausschüssen und der Frage, welche Rolle das Treffen der Vorsitzenden bei der Stärkung spielen kann.
Nils-Hendrik Grohmann beschäftigt sich mit dem noch andauernden Stärkungsprozess der UN-Menschenrechtsvertragsorgane. Er analysiert, welche rechtlichen Befugnisse die Ausschüsse haben, ob sie von sich aus Vorschläge einbringen können und inwieweit sie ihre Verfahrensweisen bisher aufeinander abgestimmt haben. Ein weiterer Schwerpunkt liegt auf der Zusammenarbeit zwischen den verschiedenen Ausschüssen und der Frage, welche Rolle das Treffen der Vorsitzenden bei der Stärkung spielen kann.
Classification, prediction and evaluation of graph neural networks on online social media platforms
(2024)
The vast amount of data generated on social media platforms have made them a valuable source of information for businesses, governments and researchers. Social media data can provide insights into user behavior, preferences, and opinions. In this work, we address two important challenges in social media analytics. Predicting user engagement with online content has become a critical task for content creators to increase user engagement and reach larger audiences. Traditional user engagement prediction approaches rely solely on features derived from the user and content. However, a new class of deep learning methods based on graphs captures not only the content features but also the graph structure of social media networks.
This thesis proposes a novel Graph Neural Network (GNN) approach to predict user interaction with tweets. The proposed approach combines the features of users, tweets and their engagement graphs. The tweet text features are extracted using pre-trained embeddings from language models, and a GNN layer is used to embed the user in a vector space. The GNN model then combines the features and graph structure to predict user engagement. The proposed approach achieves an accuracy value of 94.22% in classifying user interactions, including likes, retweets, replies, and quotes.
Another major challenge in social media analysis is detecting and classifying social bot accounts. Social bots are automated accounts used to manipulate public opinion by spreading misinformation or generating fake interactions. Detecting social bots is critical to prevent their negative impact on public opinion and trust in social media. In this thesis, we classify social bots on Twitter by applying Graph Neural Networks. The proposed approach uses a combination of both the features of a node and an aggregation of the features of a node’s neighborhood to classify social bot accounts. Our final results indicate a 6% improvement in the area under the curve score in the final predictions through the utilization of GNN.
Overall, our work highlights the importance of social media data and the potential of new methods such as GNNs to predict user engagement and detect social bots. These methods have important implications for improving the quality and reliability of information on social media platforms and mitigating the negative impact of social bots on public opinion and discourse.
The Central Andean region is characterized by diverse climate zones with sharp transitions between them. In this work, the area of interest is the South-Central Andes in northwestern Argentina that borders with Bolivia and Chile. The focus is the observation of soil moisture and water vapour with Global Navigation Satellite System (GNSS) remote-sensing methodologies. Because of the rapid temporal and spatial variations of water vapour and moisture circulations, monitoring this part of the hydrological cycle is crucial for understanding the mechanisms that control the local climate. Moreover, GNSS-based techniques have previously shown high potential and are appropriate for further investigation. This study includes both logistic-organization effort and data analysis. As for the prior, three GNSS ground stations were installed in remote locations in northwestern Argentina to acquire observations, where there was no availability of third-party data.
The methodological development for the observation of the climate variables of soil moisture and water vapour is independent and relies on different approaches. The soil-moisture estimation with GNSS reflectometry is an approximation that has demonstrated promising results, but it has yet to be operationally employed. Thus, a more advanced algorithm that exploits more observations from multiple satellite constellations was developed using data from two pilot stations in Germany. Additionally, this algorithm was slightly modified and used in a sea-level measurement campaign. Although the objective of this application is not related to monitoring hydrological parameters, its methodology is based on the same principles and helps to evaluate the core algorithm. On the other hand, water-vapour monitoring with GNSS observations is a well-established technique that is utilized operationally. Hence, the scope of this study is conducting a meteorological analysis by examining the along-the-zenith air-moisture levels and introducing indices related to the azimuthal gradient.
The results of the experiments indicate higher-quality soil moisture observations with the new algorithm. Furthermore, the analysis using the stations in northwestern Argentina illustrates the limits of this technology because of varying soil conditions and shows future research directions. The water-vapour analysis points out the strong influence of the topography on atmospheric moisture circulation and rainfall generation. Moreover, the GNSS time series allows for the identification of seasonal signatures, and the azimuthal-gradient indices permit the detection of main circulation pathways.
The remarkable antifouling properties of zwitterionic polymers in controlled environments are often counteracted by their delicate mechanical stability. In order to improve the mechanical stabilities of zwitterionic hydrogels, the effect of increased crosslinker densities was thus explored. In a first approach, terpolymers of zwitterionic monomer 3-[N -2(methacryloyloxy)ethyl-N,N-dimethyl]ammonio propane-1-sulfonate (SPE), hydrophobic monomer butyl methacrylate (BMA), and photo-crosslinker 2-(4-benzoylphenoxy)ethyl methacrylate (BPEMA) were synthesized. Thin hydrogel coatings of the copolymers were then produced and photo-crosslinked. Studies of the swollen hydrogel films showed that not only the mechanical stability but also, unexpectedly, the antifouling properties were improved by the presence of hydrophobic BMA units in the terpolymers.
Based on the positive results shown by the amphiphilic terpolymers and in order to further test the impact that hydrophobicity has on both the antifouling properties of zwitterionic hydrogels and on their mechanical stability, a new amphiphilic zwitterionic methacrylic monomer, 3-((2-(methacryloyloxy)hexyl)dimethylammonio)propane-1-sulfonate (M1), was synthesized in good yields in a multistep synthesis. Homopolymers of M1 were obtained by free-radical polymerization. Similarly, terpolymers of M1, zwitterionic monomer SPE, and photo-crosslinker BPEMA were synthesized by free-radical copolymerization and thoroughly characterized, including its solubilities in selected solvents.
Also, a new family of vinyl amide zwitterionic monomomers, namely 3-(dimethyl(2-(N -vinylacetamido)ethyl)ammonio)propane-1-sulfonate (M2), 4-(dimethyl(2-(N-vinylacetamido)ethyl)ammonio)butane-1-sulfonate (M3), and 3-(dimethyl(2-(N-vinylacetamido)ethyl)ammonio)propyl sulfate (M4), together with the new photo-crosslinker 4-benzoyl-N-vinylbenzamide (M5) that is well-suited for copolymerization with vinylamides, are introduced within the scope of the present work. The monomers are synthesized with good yields developing a multistep synthesis. Homopolymers of the new vinyl amide zwitterionic monomers are obtained by free-radical polymerization and thoroughly characterized. From the solubility tests, it is remarkable that the homopolymers produced are fully soluble in water, evidence of their high hydrophilicity. Copolymerization of the vinyl amide zwitterionic monomers, M2, M3, and M4 with the vinyl amide photo-crosslinker M5 proved to require very specific polymerization conditions. Nevertheless, copolymers were successfully obtained by free-radical copolymerization under appropriate conditions.
Moreover, in an attempt to mitigate the intrinsic hydrophobicity introduced in the copolymers by the photo-crosslinkers, and based on the proven affinity of quaternized diallylamines to copolymerize with vinyl amides, a new quaternized diallylamine sulfobetaine photo-crosslinker 3-(diallyl(2-(4-benzoylphenoxy)ethyl)ammonio)propane-1-sulfonate (M6) is synthesized. However, despite a priori promising copolymerization suitability, copolymerization with the vinyl amide zwitterionic monomers could not be achieved.
Efficiently managing large state is a key challenge for data management systems. Traditionally, state is split into fast but volatile state in memory for processing and persistent but slow state on secondary storage for durability. Persistent memory (PMem), as a new technology in the storage hierarchy, blurs the lines between these states by offering both byte-addressability and low latency like DRAM as well persistence like secondary storage. These characteristics have the potential to cause a major performance shift in database systems.
Driven by the potential impact that PMem has on data management systems, in this thesis we explore their use of PMem. We first evaluate the performance of real PMem hardware in the form of Intel Optane in a wide range of setups. To this end, we propose PerMA-Bench, a configurable benchmark framework that allows users to evaluate the performance of customizable database-related PMem access. Based on experimental results obtained with PerMA-Bench, we discuss findings and identify general and implementation-specific aspects that influence PMem performance and should be considered in future work to improve PMem-aware designs. We then propose Viper, a hybrid PMem-DRAM key-value store. Based on PMem-aware access patterns, we show how to leverage PMem and DRAM efficiently to design a key database component. Our evaluation shows that Viper outperforms existing key-value stores by 4–18x for inserts while offering full data persistence and achieving similar or better lookup performance. Next, we show which changes must be made to integrate PMem components into larger systems. By the example of stream processing engines, we highlight limitations of current designs and propose a prototype engine that overcomes these limitations. This allows our prototype to fully leverage PMem's performance for its internal state management. Finally, in light of Optane's discontinuation, we discuss how insights from PMem research can be transferred to future multi-tier memory setups by the example of Compute Express Link (CXL).
Overall, we show that PMem offers high performance for state management, bridging the gap between fast but volatile DRAM and persistent but slow secondary storage. Although Optane was discontinued, new memory technologies are continuously emerging in various forms and we outline how novel designs for them can build on insights from existing PMem research.
Körper – Karte – Text
(2024)
Rabelais' Pentalogie um die Riesen Gargantua und Pantagruel spiegelt Aspekte des sich verändernden Weltbildes ihrer Entstehungszeit. Diese Studie untersucht auf der Folie der Theorie des Simulakrum Schrift, wie Körpermodellierungen und kartographisches imaginaire durch den Autor als Strategien der Verhüllung verborgener Botschaften eingesetzt werden. Sie zeigt an ausgewählten Beispielen des Quart Livre die Aufweichung der Grenzen von Körper, Karte und Text und deren Durchdringung. Die Metaphorizität des Textes gibt Aufschluss über seine Autoreflexivität und bewirkt eine gleichsam ganzheitliche Lektüreerfahrung. Schließlich avanciert die Fiktion in ihrer Trugbildhaftigkeit als grotesk-sinnlicher Körper und polysemantische Karte zum Welterklärungsmodell, das jedoch erst dechiffriert werden muss.
Actin is one of the most highly conserved proteins in eukaryotes and distinct actin-related proteins with filament-forming properties are even found in prokaryotes. Due to these commonalities, actin-modulating proteins of many species share similar structural properties and proposed functions. The polymerization and depolymerization of actin are critical processes for a cell as they can contribute to shape changes to adapt to its environment and to move and distribute nutrients and cellular components within the cell. However, to what extent functions of actin-binding proteins are conserved between distantly related species, has only been addressed in a few cases. In this work, functions of Coronin-A (CorA) and Actin-interacting protein 1 (Aip1), two proteins involved in actin dynamics, were characterized. In addition, the interchangeability and function of Aip1 were investigated in two phylogenetically distant model organisms. The flowering plant Arabidopsis thaliana (encoding two homologs, AIP1-1 and AIP1-2) and in the amoeba Dictyostelium discoideum (encoding one homolog, DdAip1) were chosen because the functions of their actin cytoskeletons may differ in many aspects. Functional analyses between species were conducted for AIP1 homologs as flowering plants do not harbor a CorA gene.
In the first part of the study, the effect of four different mutation methods on the function of Coronin-A protein and the resulting phenotype in D. discoideum was revealed in two genetic knockouts, one RNAi knockdown and a sudden loss-of-function mutant created by chemical-induced dislocation (CID). The advantages and disadvantages of the different mutation methods on the motility, appearance and development of the amoebae were investigated, and the results showed that not all observed properties were affected with the same intensity. Remarkably, a new combination of Selection-Linked Integration and CID could be established.
In the second and third parts of the thesis, the exchange of Aip1 between plant and amoeba was carried out. For A. thaliana, the two homologs (AIP1-1 and AIP1-2) were analyzed for functionality as well as in D. discoideum. In the Aip1-deficient amoeba, rescue with AIP1-1 was more effective than with AIP1-2. The main results in the plant showed that in the aip1-2 mutant background, reintroduced AIP1-2 displayed the most efficient rescue and A. thaliana AIP1-1 rescued better than DdAip1. The choice of the tagging site was important for the function of Aip1 as steric hindrance is a problem. The DdAip1 was less effective when tagged at the C-terminus, while the plant AIP1s showed mixed results depending on the tag position. In conclusion, the foreign proteins partially rescued phenotypes of mutant plants and mutant amoebae, despite the organisms only being very distantly related in evolutionary terms.
Die umfangreiche rechtswissenschaftliche Studie befasst sich mit den preußischen Staatskirchenverträgen aus der Zeit der Weimarer Republik. Diese Verträge waren Höhepunkte einer Entwicklung in Richtung größerer Freiheit und Unabhängigkeit der Kirchen vom Staat, die den Vorgängen im Reich und in anderen deutschen Ländern teils entsprach, teils zuwiderlief. Die Entwicklung folgte keiner unverrückbaren Idealvorstellung über das Verhältnis von Staat und Kirche, sondern stellte sich stets als pragmatische Reaktion auf realpolitische Probleme dar. Die Staatskirchenverträge selbst prägten die weiteren Entwicklungen in Ost und West bis zur Gegenwart.
Die vorliegende Masterarbeit widmet sich der Frage, inwiefern die neuesten Lehrwerke für den gymnasialen Französischunterricht, Découvertes 1 (Klett) und À plus 1 (Cornelsen) aus dem Jahr 2020, sprachvernetzende Inhalte nutzen, um auf vorgelernte Sprachen und frühere Spracherwerbsprozesse hinzuweisen oder darauf zurückzugreifen. Der Fokus liegt dabei auf der Schul- und/oder Erstsprache Deutsch sowie der ersten Fremdsprache Englisch, wobei auch andere auftretende Sprachen in die Untersuchung einbezogen werden.
Die Arbeit leistet einen Beitrag zum fachdidaktischen Diskurs bezüglich mehrsprachigkeitsdidaktischer Inhalte in Fremdsprachenlehrwerken. Darüber hinaus kann sie Lehrkräften aufzeigen, wie diese aktuellen Lehrwerke ihren mehrsprachigkeitsorientierten Unterricht begleiten können.
Die Einleitung betont die Relevanz der Sprachvernetzung für den Fremdsprachenunterricht, insbesondere im Hinblick auf die individuelle Mehrsprachigkeit der Schüler*innen. Es wird auf das Potenzial des interlingualen Transfers hingewiesen, das u. a. in einer Lernerleichterung sowie der Förderung der Sprachbewusstheit und der Sprachlernbewusstheit besteht.
In Kapitel 2 werden die theoretischen Grundlagen für die Analyse gelegt, indem Mehrsprachigkeit und Mehrsprachigkeitsdidaktik, Sprachvernetzung und ihr Potenzial näher betrachtet werden. Zudem wird anhand des Deutschen und Englischen aufgezeigt, welches sprachliche Transferpotenzial im Anfangsunterricht Französisch eingebracht werden könnte. Auch die Bedingungen dafür, dass Schüler*innen den interlingualen Transfer in ihrem Spracherwerb einsetzen, werden besprochen.
Kapitel 3 gibt einen Überblick über den Forschungsstand zu Sprachvernetzung und Mehrsprachigkeit in Fremdsprachenlehrwerken und identifiziert die Forschungslücke, die diese Arbeit zu schließen versucht.
In Kapitel 4 werden die Forschungsfrage und ihre Unterfragen formuliert, die untersuchten Lehrwerke beschrieben und die Auswahl der Lehrwerke und der untersuchten Lehrwerkskomponenten begründet. Zudem wird die Methodik der vergleichenden Lehrwerkanalyse erläutert.
Die Ergebnisse der Analyse werden in Kapitel 5 ausführlich dargestellt. Es wird aufgezeigt, welche sprachvernetzenden Inhalte in den jeweiligen Lehrwerken vorkommen – in welcher Form und unter Einbezug welcher Sprachen und sprachlichen Ebenen.
In Kapitel 6 werden die Ergebnisse diskutiert und analysiert, wobei auf die Mehrsprachigkeitskonzepte der Lehrwerke und die Trends bei den sprachvernetzenden Inhalten eingegangen wird.
Im abschließenden Kapitel 7 wird zusammenfassend betont, dass beide Lehrwerke viele sprachvernetzende Inhalte anbieten, die das Potenzial haben, mehrsprachigkeitsdidaktisches Arbeiten zu unterstützen. Insbesondere auf der Produktionsebene werden jedoch noch zu wenige Transferprozesse initiiert. Zudem wird aufgezeigt, welche weiteren Untersuchungen ergänzend möglich sind, z. B. hinsichtlich des Einsatzes der sprachvernetzenden Inhalte im Unterricht.
Enterprise solutions, specifically enterprise systems, have allowed companies to integrate enterprises’ operations throughout. The integration scope of enterprise solutions has increasingly widened, now often covering customer activities, activities along supply chains, and platform ecosystems. IS research has contributed a wide range of explanatory and design knowledge dealing with this class of IS. During the last two decades, many technological as well as managerial/organizational innovations extended the affordances of enterprise solutions—but this broader scope also challenges traditional approaches to their analysis and design. This position paper presents an enterprise-level (i.e., cross-solution) perspective on IS, discusses the challenges of complexity and coordination for IS design and management, presents selected enterprise-level insights for IS coordination and governance, and explores avenues towards a more comprehensive body of knowledge on this important level of analysis.
Navigating the unknown
(2024)
Visionary leadership is considered to be one of the most important elements of effective leadership. Among other things, it is related to followers' perceived meaningfulness of their work. However, little is known about whether uncertainty in the workplace affects visionary leadership's effects. Given that uncertainty is rising in many, if not most, workplaces, it is vital to understand whether this development influences the extent to which visionary leadership is associated with followers' perceived meaningfulness. In a two-source, lagged design field study of 258 leader-follower dyads from different settings, we show that uncertainty moderates the relation between visionary leadership and followers' perceived meaningfulness such that this relation is more strongly positive when uncertainty is high, rather than low. Moreover, we show that with increasing uncertainty, visionary leadership is more negatively related to followers' turnover intentions via perceived meaningfulness. This research broadens our understanding of how visionary leadership may be a particularly potent tool in times of increasing uncertainty.
While Information Systems Research exists at the individual and workgroup levels, research on IS at the enterprise level is less common. The potential synergies between the study of enterprise systems (ES) and related fields have been underexplored and often treated as separate entities. The ongoing challenge is to seamlessly integrate technological advances and align business processes across organizations. While systems integration within an organization is common, changes occur when industry and ecosystem perspectives come into play. The four selected papers address different facets of the future role of enterprise ecosystems, including implementation challenges, ecosystem boundaries, and B2B platform specifics.
The icosahedral non-hydrostatic large eddy model (ICON-LEM) was applied around the drift track of the Multidisciplinary Observatory Study of the Arctic (MOSAiC) in 2019 and 2020. The model was set up with horizontal grid-scales between 100m and 800m on areas with radii of 17.5km and 140 km. At its lateral boundaries, the model was driven by analysis data from the German Weather Service (DWD), downscaled by ICON in limited area mode (ICON-LAM) with horizontal grid-scale of 3 km.
The aim of this thesis was the investigation of the atmospheric boundary layer near the surface in the central Arctic during polar winter with a high-resolution mesoscale model. The default settings in ICON-LEM prevent the model from representing the exchange processes in the Arctic boundary layer in accordance to the MOSAiC observations. The implemented sea-ice scheme in ICON does not include a snow layer on sea-ice, which causes a too slow response of the sea-ice surface temperature to atmospheric changes. To allow the sea-ice surface to respond faster to changes in the atmosphere, the implemented sea-ice parameterization in ICON was extended with an adapted heat capacity term.
The adapted sea-ice parameterization resulted in better agreement with the MOSAiC observations. However, the sea-ice surface temperature in the model is generally lower than observed due to biases in the downwelling long-wave radiation and the lack of complex surface structures, like leads. The large eddy resolving turbulence closure yielded a better representation of the lower boundary layer under strongly stable stratification than the non-eddy-resolving turbulence closure. Furthermore, the integration of leads into the sea-ice surface reduced the overestimation of the sensible heat flux for different weather conditions.
The results of this work help to better understand boundary layer processes in the central Arctic during the polar night. High-resolving mesoscale simulations are able to represent temporally and spatially small interactions and help to further develop parameterizations also for the application in regional and global models.
This dissertation examines the lack of clarity in the scientific literature regarding gender and negotiation performance. It is often claimed that men negotiate better than women, yet it is simultaneously emphasized that results strongly depend on context. Through the use of qualitative methods such as content analysis and critical mixed-methods review, the research question: "Are women truly inferior negotiators compared to men?" is addressed. The study comprises a descriptive and an interpretive part. The descriptive section illuminates various interpretations of gender-specific negotiation theory among citing authors, with 67% arguing for a general superiority of men. However, given the high variance in gender-specific differences, the focus should instead be on the context-dependency of negotiation performance. Generalized statements can be made within contexts, but not across them. In the interpretive section, several factors contributing to this misinterpretation are highlighted, including discrepancies in the definition of negotiation performance and distortions in research communication.. From a scientific perspective, this study underscores the need for a nuanced sociological analysis and warns against the one-sided acceptance of inaccurate scientific interpretations. From a practical standpoint, it amplifies the voices of women affected by biased research paradigms. Overall, the dissertation clarifies the theory of gender-specific negotiation performance and advocates for the elimination of biases in scientific discourse.
With Arctic ground as a huge and temperature-sensitive carbon reservoir, maintaining low ground temperatures and frozen conditions to prevent further carbon emissions that contrib-ute to global climate warming is a key element in humankind’s fight to maintain habitable con-ditions on earth. Former studies showed that during the late Pleistocene, Arctic ground condi-tions were generally colder and more stable as the result of an ecosystem dominated by large herbivorous mammals and vast extents of graminoid vegetation – the mammoth steppe. Characterised by high plant productivity (grassland) and low ground insulation due to animal-caused compression and removal of snow, this ecosystem enabled deep permafrost aggrad-ation. Now, with tundra and shrub vegetation common in the terrestrial Arctic, these effects are not in place anymore. However, it appears to be possible to recreate this ecosystem local-ly by artificially increasing animal numbers, and hence keep Arctic ground cold to reduce or-ganic matter decomposition and carbon release into the atmosphere.
By measuring thaw depth, total organic carbon and total nitrogen content, stable carbon iso-tope ratio, radiocarbon age, n-alkane and alcohol characteristics and assessing dominant vegetation types along grazing intensity transects in two contrasting Arctic areas, it was found that recreating conditions locally, similar to the mammoth steppe, seems to be possible. For permafrost-affected soil, it was shown that intensive grazing in direct comparison to non-grazed areas reduces active layer depth and leads to higher TOC contents in the active layer soil. For soil only frozen on top in winter, an increase of TOC with grazing intensity could not be found, most likely because of confounding factors such as vertical water and carbon movement, which is not possible with an impermeable layer in permafrost. In both areas, high animal activity led to a vegetation transformation towards species-poor graminoid-dominated landscapes with less shrubs. Lipid biomarker analysis revealed that, even though the available organic material is different between the study areas, in both permafrost-affected and sea-sonally frozen soils the organic material in sites affected by high animal activity was less de-composed than under less intensive grazing pressure. In conclusion, high animal activity af-fects decomposition processes in Arctic soils and the ground thermal regime, visible from reduced active layer depth in permafrost areas. Therefore, grazing management might be utilised to locally stabilise permafrost and reduce Arctic carbon emissions in the future, but is likely not scalable to the entire permafrost region.
Arachidonsäurelipoxygenasen (ALOX-Isoformen) sind Lipid-peroxidierenden Enzyme, die bei der Zelldifferenzierung und bei der Pathogenese verschiedener Erkrankungen bedeutsam sind. Im menschlichen Genom gibt es sechs funktionelle ALOX-Gene, die als Einzelkopiegene vorliegen. Für jedes humane ALOX-Gen gibt es ein orthologes Mausgen. Obwohl sich die sechs humanen ALOX-Isoformen strukturell sehr ähnlich sind, unterscheiden sich ihre funktionellen Eigenschaften deutlich voneinander. In der vorliegenden Arbeit wurden vier unterschiedliche Fragestellungen zum Vorkommen, zur biologischen Rolle und zur Evolutionsabhängigkeit der enzymatischen Eigenschaften von Säugetier-ALOX-Isoformen untersucht:
1) Spitzhörnchen (Tupaiidae) sind evolutionär näher mit dem Menschen verwandt als Nagetiere und wurden deshalb als Alternativmodelle für die Untersuchung menschlicher Erkrankungen vorgeschlagen. In dieser Arbeit wurde erstmals der Arachidonsäurestoffwechsel von Spitzhörnchen untersucht. Dabei wurde festgestellt, dass im Genom von Tupaia belangeri vier unterschiedliche ALOX15-Gene vorkommen und die Enzyme sich hinsichtlich ihrer katalytischen Eigenschaften ähneln. Diese genomische Vielfalt, die weder beim Menschen noch bei Mäusen vorhanden ist, erschwert die funktionellen Untersuchungen zur biologischen Rolle des ALOX15-Weges. Damit scheint Tupaia belangeri kein geeigneteres Tiermodel für die Untersuchung des ALOX15-Weges des Menschen zu sein.
2) Entsprechend der Evolutionshypothese können Säugetier-ALOX15-Orthologe in Arachidonsäure-12-lipoxygenierende- und Arachidonsäure-15-lipoxygenierende Enzyme eingeteilt werden. Dabei exprimieren Säugetierspezies, die einen höheren Evolutionsgrad als Gibbons aufweisen, Arachidonsäure-15-lipoxygenierende ALOX15-Orthologe, während evolutionär weniger weit entwickelte Säugetiere Arachidonsäure-12 lipoxygenierende Enzyme besitzen. In dieser Arbeit wurden elf neue ALOX15-Orthologe als rekombinante Proteine exprimiert und funktionell charakterisiert. Die erhaltenen Ergebnisse fügen sich widerspruchsfrei in die Evolutionshypothese ein und verbreitern deren experimentelle Basis. Die experimentellen Daten bestätigen auch das Triadenkonzept.
3) Da humane und murine ALOX15B-Orthologe unterschiedliche funktionelle Eigenschaften aufweisen, können Ergebnisse aus murinen Krankheitsmodellen zur biologischen Rolle der ALOX15B nicht direkt auf den Menschen übertragen werden. Um die ALOX15B-Orthologen von Maus und Mensch funktionell einander anzugleichen, wurden im Rahmen der vorliegenden Arbeit Knock-in Mäuse durch die In vivo Mutagenese mittels CRISPR/Cas9-Technik hergestellt. Diese exprimieren eine humanisierte Mutante (Doppelmutation von Tyrosin603Asparaginsäure+Histidin604Valin) der murinen Alox15b. Diese Mäuse waren lebens- und fortpflanzungsfähig, zeigten aber geschlechtsspezifische Unterschiede zu ausgekreuzten Wildtyp-Kontrolltieren im Rahmen ihre Individualentwicklung.
4) In vorhergehenden Untersuchungen zur Rolle der ALOX15B in Rahmen der Entzündungsreaktion wurde eine antiinflammatorische Wirkung des Enzyms postuliert. In der vorliegenden Arbeit wurde untersucht, ob eine Humanisierung der murinen Alox15b die Entzündungsreaktion in zwei verschiedenen murinen Entzündungsmodellen beeinflusst. Eine Humanisierung der murinen Alox15b führte zu einer verstärkten Ausbildung von Entzündungssymptomen im induzierten Dextran-Natrium-Sulfat-Kolitismodell. Im Gegensatz dazu bewirkte die Humanisierung der Alox15b eine Abschwächung der Entzündungssymptome im Freund‘schen Adjuvans Pfotenödemmodell. Diese Daten deuten darauf hin, dass sich die Rolle der ALOX15B in verschiedenen Entzündungsmodellen unterscheidet.
I need to move it, move It!
(2024)
Purpose
Student interest and learning success is an important component of teaching learning research. However, while the impact of emotions and psychological needs on students' achievements has been a focus of research, the impact of their physiological needs has been under studied. In this explorative study, I examine what impact the physiological and psychological needs of student teachers have on their feelings, motivation, and interest in different learning settings.
Approach
The research method used was the daily reconstruction method and included the Felix-App, a new digital research and feedback tool that allows the measurement of feelings, needs, motivation, and interest in real time.
Findings
The results suggest the importance of physiological needs for perceived emotions, motivation, and interest in the learning subject. The psychological needs, on the other hand, are of less importance.
Originality
The Felix-App is an innovative tool to learn more about learners' emotions and needs in real learning settings. The importance of physiological needs has been known since Maslow, but should be considered much more in the context of teaching and learning research in the future. There is a need for further research on the importance of physical aspects in learning.
In many churches nowadays, there has been a standardized approach to premarital counseling for couples involving social, pastoral, and psychological perspectives. In contrast, many rabbis and other Jewish officials still concentrate on legal aspects alone. The need for resolving important issues on the verge of wedlock is too often left to secular experts in law, psychology, or counseling. However, in recent years, this lack of formal training for marriage preparation has also been acknowledged by the Jewish clergy in order to incorporate it in the preparatory period before the bond is tied. This case study focuses on Jewish and Roman Catholic conceptions of marriage, past and present. We intend to do a comparative analysis of the prerequisites of religious marriage based on the assumption that both Judaism and the Roman Catholic Church have a distinct legal framework to assess marriage preparation.
Volcanic hydrothermal systems are an integral part of most volcanoes and typically involve a heat source, adequate fluid supply, and fracture or pore systems through which the fluids can circulate within the volcanic edifice. Associated with this are subtle but powerful processes that can significantly influence the evolution of volcanic activity or the stability of the near-surface volcanic system through mechanical weakening, permeability reduction, and sealing of the affected volcanic rock. These processes are well constrained for rock samples by laboratory analyses but are still difficult to extrapolate and evaluate at the scale of an entire volcano. Advances in unmanned aircraft systems (UAS), sensor technology, and photogrammetric processing routines now allow us to image volcanic surfaces at the centimeter scale and thus study volcanic hydrothermal systems in great detail. This thesis aims to explore the potential of UAS approaches for studying the structures, processes, and dynamics of volcanic hydrothermal systems but also to develop methodological approaches to uncover secondary information hidden in the data, capable of indicating spatiotemporal dynamics or potentially critical developments associated with hydrothermal alteration. To accomplish this, the thesis describes the investigation of two near-surface volcanic hydrothermal systems, the El Tatio geyser field in Chile and the fumarole field of La Fossa di Vulcano (Italy), both of which are among the best-studied sites of their kind. Through image analysis, statistical, and spatial analyses we have been able to provide the most detailed structural images of both study sites to date, with new insights into the driving forces of such systems but also revealing new potential controls, which are summarized in conceptual site-specific models. Furthermore, the thesis explores methodological remote sensing approaches to detect, classify and constrain hydrothermal alteration and surface degassing from UAS-derived data, evaluated them by mineralogical and chemical ground-truthing, and compares the alteration pattern with the present-day degassing activity. A significant contribution of the often neglected diffuse degassing activity to the total amount of degassing is revealed and constrains secondary processes and dynamics associated with hydrothermal alteration that lead to potentially critical developments like surface sealing. The results and methods used provide new approaches for alteration research, for the monitoring of degassing and alteration effects, and for thermal monitoring of fumarole fields, with the potential to be incorporated into volcano monitoring routines.
Electricity production contributes to a significant share of greenhouse gas emissions in Europe and is thus an important driver of climate change. To fulfil the Paris Agreement, the European Union (EU) needs a rapid transition to a fully decarbonised power production system. Presumably, such a system will be largely based on renewables. So far, many EU countries have supported a shift towards renewables such as solar and wind power using support schemes, but the economic and political context is changing. Renewables are now cheaper than ever before and have become cost-competitive with conventional technologies. Therefore, European policymakers are striving to better integrate renewables into a competitive market and to increase the cost-effectiveness of the expansion of renewables. The first step was to replace previous fixed-price schemes with competitive auctions. In a second step, these auctions have become more technology-open. Finally, some governments may phase out any support for renewables and fully expose them to the competitive power market.
However, such policy changes may be at odds with the need to rapidly expand renewables and meet national targets due to market characteristics and investors’ risk perception. Without support, price risks are higher, and it may be difficult to meet an investor’s income expectations. Furthermore, policy changes across different countries could have unexpected effects if power markets are interconnected and investors able to shift their investments. Finally, in multi-technology auctions, technologies may dominate, which can be a risk for long-term power system reliability. Therefore, in my thesis, I explore the effects of phasing out support policies for renewables, of coordinating these phase-outs across countries, and of using multi-technology designs. I expand the public policy literature about investment behaviour and policy design as well as policy change and coordination, and I further develop an agent-based model.
The main questions of my thesis are what the cost and deployment effects of gradually exposing renewables to market forces would be and how coordination between countries affects investors’ decisions and market prices.. In my three contributions to the academic literature, I use different methods and come to the following results. In the first contribution, I use a conjoint analysis and market simulation to evaluate the effects of phasing out support or reintroducing feed-in tariffs from the perspective of investors. I find that a phase-out leads to investment shifts, either to other still-supported technologies or to other countries that continue to offer support. I conclude that the coordination of policy changes avoids such shifts.. In the second contribution, I integrate the empirically-derived preferences from the first contribution in to an agent-based power system model of two countries to simulate the effects of ending auctions for renewables. I find that this slows the energy transition, and that cross-border effects are relevant. Consequently, continued support is necessary to meet the national renewables targets. In the third contribution, I analyse the outcome of past multi-technology auctions using descriptive statistics, regression analysis as well as case study comparisons. I find that the outcomes are skewed towards single technologies. This cannot be explained by individual design elements of the auctions, but rather results from context-specific and country-specific characteristics. Based on this, I discuss potential implications for long-term power system reliability.
The main conclusions of my thesis are that a complete phase-out of renewables support would slow down the energy transition and thus jeopardize climate targets, and that multi-technology auctions may pose a risk for some countries, especially those that cannot regulate an unbalanced power plant portfolio in the long term. If policymakers decide to continue supporting renewables, they may consider adopting technology-specific auctions to better steer their portfolio. In contrast, if policymakers still want to phase out support, they should coordinate these policy changes with other countries. Otherwise, overall transition costs can be higher, because investment decisions shift to still-supported but more expensive technologies.
Eskalation des Commitments in Wirtschaftsinformatik Projekten: eine kognitiv-affektive Perspektive
(2024)
Projekte im Bereich der Wirtschaftsinformatik (IS-Projekte) sind von zentraler Bedeutung für die Steuerung von Unternehmensstrategien und die Aufrechterhaltung von Wettbewerbsvorteilen, überschreiten jedoch häufig das Budget, sprengen den Zeitrahmen und weisen eine hohe Misserfolgsquote auf. Diese Dissertation befasst sich mit den psychologischen Grundlagen menschlichen Verhaltens - insbesondere Kognition und Emotion - im Zusammenhang mit einem weit verbreiteten Problem im IS-Projektmanagement: der Tendenz, an fehlgehenden Handlungssträngen festzuhalten, auch Eskalation des Commitments (Englisch: “escalation of commitment” - EoC) genannt.
Mit einem kombinierten Forschungsansatz (dem Mix von qualitativen und quantitativen Methoden) untersuche ich in meiner Dissertation die emotionalen und kognitiven Grundlagen der Entscheidungsfindung hinter eskalierendem Commitment zu scheiternden IS-Projekten und deren Entwicklung über die Zeit. Die Ergebnisse eines psychophysiologischen Laborexperiments liefern Belege auf die Vorhersagen bezüglich der Rolle von negativen und komplexen situativen Emotionen der kognitiven Dissonanz Theorie gegenüber der Coping-Theorie und trägt zu einem besseren Verständnis dafür bei, wie sich Eskalationstendenzen während sequenzieller Entscheidungsfindung aufgrund kognitiver Lerneffekte verändern. Mit Hilfe psychophysiologischer Messungen, einschließlich der Daten-Triangulation zwischen elektrodermaler und kardiovaskulärer Aktivität sowie künstliche Intelligenz-basierter Analyse von Gesichtsmikroexpressionen, enthüllt diese Forschung physiologische Marker für eskalierendes Commitment. Ergänzend zu dem Experiment zeigt eine qualitative Analyse text-basierter Reflexionen während der Eskalationssituationen, dass Entscheidungsträger verschiedene kognitive Begründungsmuster verwenden, um eskalierende Verhaltensweisen zu rechtfertigen, die auf eine Sequenz von vier unterschiedlichen kognitiven Phasen schließen lassen.
Durch die Integration von qualitativen und quantitativen Erkenntnissen entwickelt diese Dissertation ein umfassendes theoretisches Model dafür, wie Kognition und Emotion eskalierendes Commitment über die Zeit beeinflussen. Ich schlage vor, dass eskalierendes Commitment eine zyklische Anpassung von Denkmodellen ist, die sich durch Veränderungen in kognitiven Begründungsmustern, Variationen im zeitlichen Kognitionsmodus und Interaktionen mit situativen Emotionen und deren Erwartung auszeichnet. Der Hauptbeitrag dieser Arbeit liegt in der Entflechtung der emotionalen und kognitiven Mechanismen, die eskalierendes Commitment im Kontext von IS-Projekten antreiben. Die Erkenntnisse tragen dazu bei, die Qualität von Entscheidungen unter Unsicherheit zu verbessern und liefern die Grundlage für die Entwicklung von Deeskalationsstrategien. Beteiligte an „in Schieflage geratenden“ IS-Projekten sollten sich der Tendenz auf fehlgeschlagenen Aktionen zu beharren und der Bedeutung der zugrundeliegenden emotionalen und kognitiven Dynamiken bewusst sein.
Microalgae have been recognized as a promising green production platform for recombinant proteins. The majority of studies on recombinant protein expression have been conducted in the green microalga C. reinhardtii. While promising improvement regarding nuclear transgene expression in this alga has been made, it is still inefficient due to epigenetic silencing, often resulting in low yields that are not competitive with other expressor organisms. Other microalgal species might be better suited for high-level protein expression, but are limited in their availability of molecular tools.
The red microalga Porphyridium purpureum recently emerged as candidate for the production of recombinant proteins. It is promising in that transformation vectors are episomally maintained as autonomously replicating plasmids in the nucleus at a high copy number, thus leading to high expression values in this red alga.
In this work, we expand the genetic tools for P. purpureum and investigate parameters that govern efficient transgene expression. We provide an improved transformation protocol to streamline the generation of transgenic lines in this organism. After being able to efficiently generate transgenic lines, we showed that codon usage is a main determinant of high-level transgene expression, not only at the protein level but also at the level of mRNA accumulation. The optimized expression constructs resulted in YFP accumulation up to an unprecedented 5% of the total soluble protein. Furthermore, we designed new constructs conferring efficient transgene expression into the culture medium, simplifying purification and harvests of recombinant proteins. To further improve transgene expression, we tested endogenous promoters driving the most highly transcribed genes in P. purpureum and found minor increase of YFP accumulation.
We employed the previous findings to express complex viral antigens from the hepatitis B virus and the hepatitis C virus in P. purpureum to demonstrate its feasibility as producer of biopharmaceuticals. The viral glycoproteins were successfully produced to high levels and could reach their native confirmation, indicating a functional glycosylation machinery and an appropriate folding environment in this red alga. We could successfully upscale the biomass production of transgenic lines and with that provide enough material for immunization trials in mice that were performed in collaboration. These trials showed no toxicity of neither the biomass nor the purified antigens, and, additionally, the algal-produced antigens were able to elicit a strong and specific immune response.
The results presented in this work pave the way for P. purpureum as a new promising producer organism for biopharmaceuticals in the microalgal field.
The Women, Peace and Security Agenda (WPSA) is an international framework addressing the disproportionate impact of armed conflict on women and girls and promoting their meaningful participation in peacebuilding efforts. The Security Council called on Member States to develop National Action Plans (NAPs) to operationalize the four pillars of the Agenda. This study looks at the relevant steps undertaken by both Germany and the European Union. The author calls for improvements on either level and makes four recommendations.
Citizenship
(2024)
Wo programmiert wird, da passieren Fehler. Um das Debugging, also die Suche sowie die Behebung von Fehlern in Quellcode, stärker explizit zu adressieren, verfolgt die vorliegende Arbeit das Ziel, entlang einer prototypischen Lernumgebung sowohl ein systematisches Vorgehen während des Debuggings zu vermitteln als auch Gestaltungsfolgerungen für ebensolche Lernumgebungen zu identifizieren. Dazu wird die folgende Forschungsfrage gestellt: Wie verhalten sich die Lernenden während des kurzzeitigen Gebrauchs einer Lernumgebung nach dem Cognitive Apprenticeship-Ansatz mit dem Ziel der expliziten Vermittlung eines systematischen Debuggingvorgehens und welche Eindrücke entstehen während der Bearbeitung?
Zur Beantwortung dieser Forschungsfrage wurde orientierend an literaturbasierten Implikationen für die Vermittlung von Debugging und (medien-)didaktischen Gestaltungsaspekten eine prototypische Lernumgebung entwickelt und im Rahmen einer qualitativen Nutzerstudie mit Bachelorstudierenden informatischer Studiengänge erprobt. Hierbei wurden zum einen anwendungsbezogene Verbesserungspotenziale identifiziert. Zum anderen zeigte sich insbesondere gegenüber der Systematisierung des Debuggingprozesses innerhalb der Aufgabenbearbeitung eine positive Resonanz. Eine Untersuchung, inwieweit sich die Nutzung der Lernumgebung längerfristig auf das Verhalten von Personen und ihre Vorgehensweisen während des Debuggings auswirkt, könnte Gegenstand kommender Arbeiten sein.
Spring Issue
(2024)
Mindful Eating
(2024)
Maladaptive eating behaviors such as emotional eating, external eating, and loss-of-control eating are widespread in the general population. Moreover, they are associated to adverse health outcomes and well-known for their role in the development and maintenance of eating disorders and obesity (i.e., eating and weight disorders). Eating and weight disorders are associated with crucial burden for individuals as well as high costs for society in general. At the same time, corresponding treatments yield poor outcomes. Thus, innovative concepts are needed to improve prevention and treatment of these conditions.
The Buddhist concept of mindfulness (i.e., paying attention to the present moment without judgement) and its delivery via mindfulness-based intervention programs (MBPs) has gained wide popularity in the area of maladaptive eating behaviors and associated eating and weight disorders over the last two decades. Though previous findings on their effects seem promising, the current assessment of mindfulness and its mere application via multi-component MBPs hampers to draw conclusions on the extent to which mindfulness-immanent qualities actually account for the effects (e.g., the modification of maladaptive eating behaviors). However, this knowledge is pivotal for interpreting previous effects correctly and for avoiding to cause harm in particularly vulnerable groups such as those with eating and weight disorders.
To address these shortcomings, recent research has focused on the context-specific approach of mindful eating (ME) to investigate underlying mechanisms of action. ME can be considered a subdomain of generic mindfulness describing it specifically in relation to the process of eating and associated feelings, thoughts, and motives, thus including a variety of different attitudes and behaviors. However, there is no universal operationalization and the current assessment of ME suffers from different limitations. Specifically, current measurement instruments are not suited for a comprehensive assessment of the multiple facets of the construct that are currently discussed as important in the literature. This in turn hampers comparisons of different ME facets which would allow to evaluate their particular effect on maladaptive eating behaviors. This knowledge is needed to tailor prevention and treatment of associated eating and weight disorders properly and to explore potential underlying mechanisms of action which have so far been proposed mainly on theoretical grounds.
The dissertation at hand aims to provide evidence-based fundamental research that contributes to our understanding of how mindfulness, more specifically its context-specific form of ME, impacts maladaptive eating behaviors and, consequently, how it could be used appropriately to enrich the current prevention and treatment approaches for eating and weight disorders in the future.
Specifically, in this thesis, three scientific manuscripts applying several qualitative and quantitative techniques in four sequential studies are presented. These manuscripts were published in or submitted to three scientific peer-reviewed journals to shed light on the following questions:
I. How can ME be measured comprehensively and in a reliable and valid way to advance the understanding of how mindfulness works in the context of eating?
II. Does the context-specific construct of ME have an advantage over the generic concept in advancing the understanding of how mindfulness is related to maladaptive eating behaviors?
III. Which ME facets are particularly useful in explaining maladaptive eating behaviors?
IV. Does training a particular ME facet result in changes in maladaptive eating behaviors?
To answer the first research question (Paper 1), a multi-method approach using three subsequent studies was applied to develop and validate a comprehensive self-report instrument to assess the multidimensional construct of ME - the Mindful Eating Inventory (MEI). Study 1 aimed to create an initial version of the MEI by following a three-step approach: First, a comprehensive item pool was compiled by including selected and adapted items of the existing ME questionnaires and supplementing them with items derived from an extensive literature review. Second, the preliminary item pool was complemented and checked for content validity by experts in the field of eating behavior and/or mindfulness (N = 15). Third, the item pool was further refined through qualitative methods: Three focus groups comprising laypersons (N = 16) were used as a check for applicability. Subsequently, think-aloud protocols (N = 10) served as a last check of comprehensibility and elimination of ambiguities.
The resulting initial MEI version was tested in Study 2 in an online convenience sample (N = 828) to explore its factor structure using exploratory factor analysis (EFA). Results were used to shorten the questionnaire in accordance with qualitative and quantitative criteria yielding the final MEI version which encompasses 30 items. These items were assigned to seven ME facets: (1) ‘Accepting and Non-attached Attitude towards one’s own eating experience’ (ANA), (2) ‘Awareness of Senses while Eating’ (ASE), (3) ‘Eating in Response to awareness of Fullness‘ (ERF), (4) ‘Awareness of eating Triggers and Motives’ (ATM), (5) ‘Interconnectedness’ (CON), (6) ‘Non-Reactive Stance’ (NRS) and (7) Focused Attention on Eating’ (FAE).
Study 3 sought to confirm the found facets and the corresponding factor structure in an independent online convenience sample (N = 612) using confirmatory factor analysis (CFA). The study served as further indication of the assumed multidimensionality of ME (the correlational seven-factor model was shown to be superior to a single-factor model). Psychometric properties of the MEI, regarding factorial validity, internal consistency, retest-reliability, and observed criterion validity using a wide range of eating-specific and general health-related outcomes, showed the inventory to be suitable for a comprehensive, reliable and valid assessment of ME. These findings were complemented by demonstrating measurement invariance of the MEI regarding gender. In accordance with the factor structure of the MEI, Paper 1 offers an empirically-derived definition of ME, succeeding in overcoming ambiguities and problems of previous attempts at defining the construct.
To answer the second and third research questions (Paper 2) a subsample of Study 2 from the MEI validation studies (N = 292) was analyzed. Incremental validity of ME beyond generic mindfulness was shown using hierarchical regression models concerning the outcome variables of maladaptive eating behaviors (emotional eating and uncontrolled eating) and nutrition behaviors (consumption of energy-dense food). Multiple regression analyses were applied to investigate the impact of the seven different ME facets (identified in Paper 1) on the same outcome variables. The following ME facets significantly contributed to explaining variance in maladaptive eating and nutrition behaviors: Accepting and Non-attached Attitude towards one`s own eating experience (ANA), Eating in Response to awareness of Fullness (ERF), the Awareness of eating Triggers and Motives (ATM), and a Non-Reactive Stance (NRS, i.e., an observing, non-impulsive attitude towards eating triggers). Results suggest that these ME facets are promising variables to consider when a) investigating potential underlying mechanisms of mindfulness and MBPs in the context of eating and b) addressing maladaptive eating behaviors in general as well as in the prevention and treatment of eating and weight disorders.
To answer the fourth research question (Paper 3), a training on an isolated exercise (‘9 Hunger’) based on the previously identified ME facet ATM was designed to explore its particular association with changes in maladaptive eating behaviors and thus to preliminary explore one possible mechanism of action. The online study was realized using a randomized controlled trial (RCT) design. Latent Change Scores (LCS) across three measurement points (before the training, directly after the training and three months later) were compared between the intervention group (n = 211) and a waitlist control group (n = 188). Short- and longer-term effects of the training could be shown on maladaptive eating behaviors (emotional eating, external eating, loss-of-control eating) and associated outcomes (intuitive eating, ME, self-compassion, well-being). Findings serve as preliminary empirical evidence that MBPs might influence maladaptive eating behaviors through an enhanced non-judgmental awareness of and distinguishment between eating motives and triggers (i.e., ATM). This mechanism of action had previously only been hypothesized from a theoretical perspective. Since maladaptive eating behaviors are associated with eating and weight disorders, the findings can enhance our understanding of the general effects of MBPs on these conditions.
The integration of the different findings leads to several suggestions of how ME might enrich different kinds of future interventions on maladaptive eating behaviors to improve health in general or the prevention and treatment of eating and weight disorders in particular. Strengths of the thesis (e.g., deliberate specific methodology, variety of designs and methods, high number of participants) are emphasized. The main limitations particularly regarding sample characteristics (e.g., higher level of formal education, fewer males, self-selected) are discussed to arrive at an outline for future studies (e.g., including multi-modal-multi-method approaches, clinical eating disorder samples and youth samples) to improve upcoming research on ME and underlying mechanisms of action of MBPs for maladaptive eating behaviors and associated eating and weight disorders.
This thesis enriches current research on mindfulness in the context of eating by providing fundamental research on the core of the ME construct. Thereby it delivers a reliable and valid instrument to comprehensively assess ME in future studies as well as an operational definition of the construct. Findings on ME facet level might inform upcoming research and practice on how to address maladaptive eating behaviors appropriately in interventions. The ME skill ‘Awareness of eating Triggers and Motives (ATM)’ as one particular mechanism of action should be further investigated in representative community and specific clinical samples to examine the validity of the results in these groups and to justify an application of the concept to the general population as well as to subgroups with eating and weight disorders in particular.
In conclusion, findings of the current thesis can be used to set future research on mindfulness, more specifically ME, and its underlying mechanism in the context of eating on a more evidence-based footing. This knowledge can inform upcoming prevention and treatment to tailor MBPs on maladaptive eating behaviors and associated eating and weight disorders appropriately.
The origin and structure of magnetic fields in the Galaxy are largely unknown. What is known is that they are essential for several astrophysical processes, in particular the propagation of cosmic rays. Our ability to describe the propagation of cosmic rays through the Galaxy is severely limited by the lack of observational data needed to probe the structure of the Galactic magnetic field on many different length scales. This is particularly true for modelling the propagation of cosmic rays into the Galactic halo, where our knowledge of the magnetic field is particularly poor.
In the last decade, observations of the Galactic halo in different frequency regimes have revealed the existence of out-of-plane bubble emission in the Galactic halo. In gamma rays these bubbles have been termed Fermi bubbles with a radial extent of ≈ 3 kpc and an azimuthal height of ≈ 6 kpc. The radio counterparts of the Fermi bubbles were seen by both the S-PASS telescopes and the Planck satellite, and showed a clear spatial overlap. The X-ray counterparts of the Fermi bubbles were named eROSITA bubbles after the eROSITA satellite, with a radial width of ≈ 7 kpc and an azimuthal height of ≈ 14 kpc. Taken together, these observations suggest the presence of large extended Galactic Halo Bubbles (GHB) and have stimulated interest in exploring the less explored Galactic halo.
In this thesis, a new toy model (GHB model) for the magnetic field and non-thermal electron distribution in the Galactic halo has been proposed. The new toy model has been used to produce polarised synchrotron emission sky maps. Chi-square analysis was used to compare the synthetic skymaps with the Planck 30 GHz polarised skymaps. The obtained constraints on the strength and azimuthal height were found to be in agreement with the S-PASS radio observations.
The upper, lower and best-fit values obtained from the above chi-squared analysis were used to generate three separate toy models. These three models were used to propagate ultra-high energy cosmic rays. This study was carried out for two potential sources, Centaurus A and NGC 253, to produce magnification maps and arrival direction skymaps. The simulated arrival direction skymaps were found to be consistent with the hotspots of Centaurus A and NGC 253 as seen in the observed arrival direction skymaps provided by the Pierre Auger Observatory (PAO).
The turbulent magnetic field component of the GHB model was also used to investigate the extragalactic dipole suppression seen by PAO. UHECRs with an extragalactic dipole were forward-tracked through the turbulent GHB model at different field strengths. The suppression in the dipole due to the varying diffusion coefficient from the simulations was noted. The results could also be compared with an analytical analogy of electrostatics. The simulations of the extragalactic dipole suppression were in agreement with similar studies carried out for galactic cosmic rays.
Cross-sectional associations of dietary biomarker patterns with health and nutritional status
(2024)
Relativistic pair beams produced in the cosmic voids by TeV gamma rays from blazars are expected to produce a detectable GeV-scale cascade emission missing in the observations. The suppression of this secondary cascade implies either the deflection of the pair beam by intergalactic magnetic fields (IGMFs) or an energy loss of the beam due to the electrostatic beam-plasma instability. IGMF of femto-Gauss strength is sufficient to significantly deflect the pair beams reducing the flux of secondary cascade below the observational limits. A similar flux reduction may result in the absence of the IGMF from the beam energy loss by the instability before the inverse Compton cooling. This dissertation consists of two studies about the instability role in the evolution of blazar-induced beams.
Firstly, we investigated the effect of sub-fG level IGMF on the beam energy loss by the instability. Considering IGMF with correlation lengths smaller than a few kpc, we found that such fields increase the transverse momentum of the pair beam particles, dramatically reducing the linear growth rate of the electrostatic instability and hence the energy-loss rate of the pair beam. Our results show that the IGMF eliminates beam plasma instability as an effective energy-loss agent at a field strength three orders of magnitude below that needed to suppress the secondary cascade emission by magnetic deflection. For intermediate-strength IGMF, we do not know a viable process to explain the observed absence of GeV-scale cascade emission and hence can be excluded.
Secondly, we probed how the beam-plasma instability feeds back on the beam, using a realistic two-dimensional beam distribution. We found that the instability broadens the beam opening angles significantly without any significant energy loss, thus confirming a recent feedback study on a simplified one-dimensional beam distribution. However, narrowing diffusion feedback of the beam particles with Lorentz factors less than 1e6 might become relevant even though initially it is negligible. Finally, when considering the continuous creation of TeV pairs, we found that the beam distribution and the wave spectrum reach a new quasi-steady state, in which the scattering of beam particles persists and the beam opening angle may increase by a factor of hundreds. This new intrinsic scattering of the cascade can result in time delays of around ten years, thus potentially mimicking the IGMF deflection. Understanding the implications on the GeV cascade emission requires accounting for inverse Compton cooling and simulating the beam-plasma system at different points in the IGM.
Digitale Plattformen prägen unsere Rechts- und Wirtschaftsordnung, die Freizeitgestaltung, das Informationsverhalten und im Aggregat die digitale Öffentlichkeit. Die damit verbundenen Rechtsfragen sind im Fluss und berühren alle juristischen Teildisziplinen. Der Tagungsband nähert sich daher den Entwicklungen des Plattformrechts aus disziplinübergreifendem Blickwinkel. Dieser Versuch einer überspannenden Perspektive fokussiert vor allem auf die beiden „Großen“ der jüngsten Rechtsakte (DSA/DMA) unter dem besonderen Gesichtspunkt ihres Vollzugs: Wie kann man ein globales Phänomen wie Plattformen lokal und regional regulieren? Welche Rolle spielt der Schwarm der Vielen in der Effektivierung der neuen Regularien? Passen Regelungsmodelle wie das Urheberrecht zum Plattformphänomen?
Legitimiertes Unrecht
(2024)
Das Oberste Gericht der DDR war integraler Bestandteil der sozialistischen Staatsführung und unterlag strengen Denk- und Organisationsstrukturen. Es war eng in die politische Agenda der SED eingebunden und genoss keinerlei Unabhängigkeit. Die Auslegung des DDR-Rechts durch das Gericht orientierte sich ausschließlich an den innen- und außenpolitischen Interessen der SED. Dies galt auch für die Rechtsprechung in Fällen der Republikflucht und ihrer gesetzlichen Vorläufer. Die höchste Gerichtsinstanz im Staat war aktiv an der Gestaltung und Umsetzung der Strafjustiz gegen Republikflüchtige beteiligt, was wesentlich zur Festigung der Herrschaftsgewalt der SED beitrug. Die vorliegende Untersuchung analysiert Urteile des Obersten Gerichts im historisch-politischen Kontext und zeigt auf, dass die Urteilspraxis ausschließlich im Interesse parteipolitischer Ziele handelte und weder dem Volk noch der eigentlichen Rechtsfindung verpflichtet war. Des Weiteren wird der maßgebliche Beitrag des Obersten Gerichts an der schrittweisen Kriminalisierung der Bürger der DDR beleuchtet. Dies wirft ein kritisches Licht auf die Rolle des Rechtssystems bei der Sicherung von Rechtsstaatlichkeit und Menschenrechten in autoritären Regimen.
The present thesis looks at cultural conceptualisations in relation to DEATH in Irish English from a Cultural Linguistic perspective and puts a special focus on the diachronic development of these conceptualisations. For the study, a corpus consisting of 1,400 death notices from the Dublin-based national newspaper The Irish Times from 14 historical periods between 1859 and 2023 was compiled, resulting in a highly specialised 70,000-word corpus. First, the manual qualitative analysis of the death notices produced evidence for eight superordinate cultural conceptualisations surrounding DEATH, namely, in the order of their frequency THE DEAD ARE TO BE REMEMBERED OR REGRETTED, DEATH IS SOMETHING POSITIVE, DEATH IS REST, DEATH IS A JOURNEY, DYING IS THE BEGINNING OF ANOTHER LIFE, DEATH IS (NOT) A TABOO, DEATH IS GOD’S WILL, and DEATH IS THE END. These conceptualisations were derived from linguistic expressions in the death notices that have these conceptualisations as a cognitive basis. Second, the quantitative comparison of the individual conceptualisations detected diachronic variation, which is interconnected with historical and social developments in Ireland. The thesis, therefore, illustrates the applicability of Cultural Linguistics as an adequate method for diachronic studies interested in culturally determined developments of conceptualisations.
The dynamic landscape of digital transformation entails an impact on industrial-age manufacturing companies that goes beyond product offerings, changing operational paradigms, and requiring an organization-wide metamorphosis. An initiative to address the given challenges is the creation of Digital Innovation Units (DIUs) – departments or distinct legal entities that use new structures and practices to develop digital products, services, and business models and support or drive incumbents’ digital transformation. With more than 300 units in German-speaking countries alone and an increasing number of scientific publications, DIUs have become a widespread phenomenon in both research and practice.
This dissertation examines the evolution process of DIUs in the manufacturing
industry during their first three years of operation, through an extensive longitudinal single-case study and several cross-case syntheses of seven DIUs. Building on the lenses of organizational change and development, time, and socio-technical systems, this research provides insights into the fundamentals, temporal dynamics, socio-technical interactions, and relational dynamics of a DIU’s evolution process. Thus, the dissertation promotes a dynamic understanding of DIUs and adds a two-dimensional perspective to the often one-dimensional view of these units and their interactions with the main organization throughout the startup and growth phases of a DIU.
Furthermore, the dissertation constructs a phase model that depicts the early stages of DIU evolution based on these findings and by incorporating literature from information systems research. As a result, it illustrates the progressive intensification of collaboration between the DIU and the main organization. After being implemented, the DIU sparks initial collaboration and instigates change within (parts of) the main organization. Over time, it adapts to the corporate environment to some extent, responding to changing circumstances in order to contribute to long-term transformation. Temporally, the DIU drives the early phases of cooperation and adaptation in particular, while the main organization triggers the first major evolutionary step and realignment of the DIU.
Overall, the thesis identifies DIUs as malleable organizational structures that are crucial for digital transformation. Moreover, it provides guidance for practitioners on the process of building a new DIU from scratch or optimizing an existing one.
Im Rahmen einer explorativen Entwicklung wurde in der vorliegenden Studie ein Konzept zur Wissenschaftskommunikation für ein Graduiertenkolleg, in dem an photochemischen Prozessen geforscht wird, erstellt und anschließend evaluiert. Der Grund dafür ist die immer stärker wachsende Forderung nach Wissenschaftskommunikation seitens der Politik. Es wird darüber hinaus gefordert, dass die Kommunikation der eigenen Forschung in Zukunft integrativer Bestandteil des wissenschaftlichen Arbeitens wird. Um junge Wissenschaftler bereits frühzeitig auf diese Aufgabe vorzubereiten, wird Wissenschaftskommunikation auch in Forschungsverbünden realisiert.
Aus diesem Grund wurde in einer Vorstudie untersucht, welche Anforderungen an ein Konzept zur Wissenschaftskommunikation im Rahmen eines Forschungsverbundes gestellt werden, indem die Einstellung der Doktoranden zur Wissenschaftskommunikation sowie ihre Kommunikationsfähigkeiten anhand eines geschlossenen Fragebogens evaluiert wurden. Darüber hinaus wurden aus den Daten Wissenschaftskommunikationstypen abgeleitet. Auf Grundlage der Ergebnisse wurden unterschiedliche Wissenschaftskommunikationsmaßnahmen entwickelt, die sich in der Konzeption, den Rezipienten, sowie der Form der Kommunikation und den Inhalten unterscheiden.
Im Rahmen dieser Entwicklung wurde eine Lerneinheit mit Bezug auf die Inhalte des Graduiertenkollegs, bestehend aus einem Lehr-Lern-Experiment und den dazugehörigen Begleitmaterialien, konzipiert. Anschließend wurde die Lerneinheit in eine der Wissenschaftskommunikationsmaßnahmen integriert. Je nach Anforderung an die Doktoranden, wurden die Maßnahmen durch vorbereitende Workshops ergänzt.
Durch einen halboffenen Pre-Post-Fragebogen wurde der Einfluss der Wissenschaftskommunikationsmaßnahmen und der dazugehörigen Workshops auf die Selbstwirksamkeit der Doktoranden evaluiert, um Rückschlüsse darauf zu ziehen, wie sich die Wahrnehmung der eigenen Kommunikationsfähigkeiten durch die Interventionen verändert. Die Ergebnisse deuten darauf hin, dass die einzelnen Wissenschaftskommunikationsmaßnahmen die verschiedenen Typen in unterschiedlicher Weise beeinflussen. Es ist anzunehmen, dass es abhängig von der eigenen Einschätzung der Kommunikationsfähigkeit unterschiedliche Bedürfnisse der Förderung gibt, die durch dedizierte Wissenschaftskommunikationsmaßnahmen berücksichtigt werden können.
Auf dieser Grundlage werden erste Ansätze für eine allgemeingültige Strategie vorgeschlagen, die die individuellen Fähigkeiten zur Wissenschaftskommunikation in einem naturwissenschaftlichen Forschungsverbund fördert.
The planetary commons
(2024)
The Anthropocene signifies the start of a no- analogue trajectory of the Earth system that is fundamentally different from the Holocene. This new trajectory is characterized by rising risks of triggering irreversible and unmanageable shifts in Earth system functioning. We urgently need a new global approach to safeguard critical Earth system regulating functions more effectively and comprehensively. The global commons framework is the closest example of an existing approach with the aim of governing biophysical systems on Earth upon which the world collectively depends. Derived during stable Holocene conditions, the global commons framework must now evolve in the light of new Anthropocene dynamics. This requires a fundamental shift from a focus only on governing shared resources beyond national jurisdiction, to one that secures critical functions of the Earth system irrespective of national boundaries. We propose a new framework—the planetary commons—which differs from the global commons framework by including not only globally shared geographic regions but also critical biophysical systems that regulate the resilience and state, and therefore livability, on Earth. The new planetary commons should articulate and create comprehensive stewardship obligations through Earth system governance aimed at restoring and strengthening planetary resilience and justice.
Enhancing economic efficiency in modular production systems through deep reinforcement learning
(2024)
In times of increasingly complex production processes and volatile customer demands, the production adaptability is crucial for a company's profitability and competitiveness. The ability to cope with rapidly changing customer requirements and unexpected internal and external events guarantees robust and efficient production processes, requiring a dedicated control concept at the shop floor level. Yet in today's practice, conventional control approaches remain in use, which may not keep up with the dynamic behaviour due to their scenario-specific and rigid properties. To address this challenge, deep learning methods were increasingly deployed due to their optimization and scalability properties. However, these approaches were often tested in specific operational applications and focused on technical performance indicators such as order tardiness or total throughput. In this paper, we propose a deep reinforcement learning based production control to optimize combined techno-financial performance measures. Based on pre-defined manufacturing modules that are supplied and operated by multiple agents, positive effects were observed in terms of increased revenue and reduced penalties due to lower throughput times and fewer delayed products. The combined modular and multi-staged approach as well as the distributed decision-making further leverage scalability and transferability to other scenarios.
Die Nutzung von Informations- und Kommunikationstechnik (IKT), Fachverfahren und die Automatisierung von Prozessen verändern die Sachbearbeitung und Leistungserstellung in der Verwaltung und somit die Tätigkeiten, Arbeitsbedingungen und Personalstrukturen. Bei der Antragsbearbeitung und Bescheiderstellung in der Ordnungs- und Leistungsverwaltung erhält IKT nicht nur eine unterstützende, sondern zunehmend auch eine leitende oder entscheidende Rolle. Abhängig von der konkreten Ausgestaltung kann die fortschreitende Digitalisierung eine ganzheitliche Sachbearbeitung ermöglichen, aber auch einschränken. Insgesamt kann sie zu einer Neuordnung des Berufsfeldes öffentlicher Dienst führen.
Comparative vote switching
(2024)
Large literatures focus on voter reactions to parties’ policy strategies, agency, or legislative performance. While many inquiries make explicit assumptions about the direction and magnitude of voter flows between parties, comparative empirical analyses of vote switching remain rare. In this article, we overcome three challenges that have previously impeded the comparative study of dynamic party competition based on voter flows: we present a novel conceptual framework for studying voter retention, defection, and attraction in multiparty systems, showcase a newly compiled data infrastructure that marries comparative vote switching data with information on party behavior and party systems in over 250 electoral contexts, and introduce a statistical model that renders our conceptual framework operable. These innovations enable first-time inquiries into the polyadic vote switching patterns underlying multiparty competition and unlock major research potentials on party competition and party system change.
While the economic harm of cartels is caused by their price-increasing effect, sanctioning by courts rather targets at the underlying process of firms reaching a price-fixing agreement. This paper provides experimental evidence on the question whether such sanctioning meets the economic target, i.e., whether evidence of a collusive meeting of the firms and of the content of their communication reliably predicts subsequent prices. We find that already the mere mutual agreement to meet predicts a strong increase in prices. Conversely, express distancing from communication completely nullifies its otherwise price-increasing effect. Using machine learning, we show that communication only increases prices if it is very explicit about how the cartel plans to behave.
Das Forschungsprojekt „Workflow-Management-Systeme für Open-Access-Hochschulverlage (OA-WFMS)” ist eine Kooperation zwischen der HTWK Leipzig und der Universität Potsdam. Ziel ist es, die Bedarfe von Universitäts- und Hochschulverlagen und Anforderungen an ein Workflow-Management-Systeme (WFMS) zu analysieren, um daraus ein generisches Lastenheft zu erstellen. Das WFMS soll den Publikationsprozess in OA-Verlagen erleichtern, beschleunigen sowie die Verbreitung von Open Access und das nachhaltige, digitale wissenschaftliche Publizieren fördern.
Das Projekt baut auf den Ergebnissen der Projekte „Open-Access-Hochschulverlag (OA-HVerlag)“ und „Open-Access-Strukturierte-Kommunikation (OA-STRUKTKOMM)“ auf. Der diesem Bericht zugrunde liegende Auftaktworkshop fand 2024 in Leipzig mit Vertreter:innen von zehn Institutionen statt. Der Workshop diente dazu, Herausforderungen und Anforderungen an ein WFMS zu ermitteln sowie bestehende Lösungsansätze und Tools zu diskutieren.
Im Workshop wurden folgende Fragen behandelt:
a. Wie kann die Organisation und Überwachung von Publikationsprozessen in wissenschaftlichen Verlagen durch ein WFMS effizient gestaltet werden?
b. Welche Anforderungen muss ein WFMS erfüllen, um Publikationsprozesse optimal zu unterstützen?
c. Welche Schnittstellen müssen berücksichtigt werden, um die Interoperabilität der Systeme zu garantieren?
d. Welche bestehenden Lösungsansätze und Tools sind bereits im Einsatz und welche Vor- und Nachteile haben diese?
Der Workshop gliederte sich in zwei Teile : Teil 1 behandelte Herausforderungen und Anforderungen (Fragen a. bis c.), Teil 2 bestehende Lösungen und Tools (Frage d.). Die Ergebnisse des Workshops fließen in die Bedarfsanalyse des Forschungsprojekts ein.
Die im Bericht dokumentierten Ergebnisse zeigen die Vielzahl der Herausforderungen der bestehenden Ansätze bezüglich des OA-Publikationsmanagements . Die Herausforderungen zeigen sich insbesondere bei der Systemheterogenität, den individuellen Anpassungsbedarfen und der Notwendigkeit der systematischen Dokumentation. Die eingesetzten Unterstützungssysteme und Tools wie Dateiablagen, Projektmanagement- und Kommunikationstools können insgesamt den Anforderungen nicht genügen, für Teillösungen sind sie jedoch nutzbar. Deshalb muss die Integration bestehender Systeme in ein zu entwickelndes OA-WFMS in Betracht gezogen und die Interoperabilität der miteinander interagierenden Systeme gewährleistet werden. Die Beteiligten des Workshops waren sich einig, dass das OA-WFMS flexibel und modular aufgebaut werden soll. Einer konsortialen Softwareentwicklung und einem gemeinsamen Betrieb im Verbund wurde der Vorrang gegeben.
Der Workshop lieferte wertvolle Einblicke in die Arbeit der Hochschulverlage und bildet somit eine solide Grundlage für die in Folge zu erarbeitende weitere Bedarfsanalyse und die Erstellung des generischen Lastenheftes.
We study the effect of energy and transport policies on pollution in two developing country cities. We use a quantitative equilibrium model with choice of housing, energy use, residential location, transport mode, and energy technology. Pollution comes from commuting and residential energy use. The model parameters are calibrated to replicate key variables for two developing country cities, Maputo, Mozambique, and Yogyakarta, Indonesia. In the counterfactual simulations, we study how various transport and energy policies affect equilibrium pollution. Policies may be induce rebound effects from increasing residential energy use or switching to high emission modes or locations. In general, these rebound effects tend to be largest for subsidies to public transport or modern residential energy technology.
The public health insurance in Germany will face huge economic challenges in the upcoming years. New diagnostic and therapeutic methods as well as the demographic change contribute to constantly rising expenditure. Although incentives for health-promoting behaviour or financial sanctions for an unhealthy lifestyle have been already discussed in the past, there has been a general reluctance to legally establish corresponding mechanisms for fear of eroding solidarity and increasing state control. In the course of the Coronavirus pandemic however, a stronger awareness rose to the fact that personal health-related life choices can have a huge impact on the stability of the healthcare system including public health insurance. Not only in Germany but throughout much of Europe, the pandemic led to a new and more fundamental debate about the relationship between individual responsibility for personal health and the wider responsibility for public health assumed by the community of solidarity.
We conduct a laboratory experiment to study how locus of control operates through people’s preferences and beliefs to influence their decisions. Using the principal–agent setting of the delegation game, we test four key channels that conceptually link locus of control to decision-making: (i) preference for agency, (ii) optimism and (iii) confidence regarding the return to effort, and (iv) illusion of control. Knowing the return and cost of stated effort, principals either retain or delegate the right to make an investment decision that generates payoffs for themselves and their agents. Extending the game to the context in which the return to stated effort is unknown allows us to explicitly study the relationship between locus of control and beliefs about the return to effort. We find that internal locus of control is linked to the preference for agency, an effect that is driven by women. We find no evidence that locus of control influences optimism and confidence about the return to stated effort, or that it operates through an illusion of control.
Dirty capitalism
(2024)
Von Garzweiler bis zum Great Pacific Garbage Patch zeigt sich offenkundig: Die kapitalistische Vergesellschaftung ist dreckig. Umso mehr braucht kritische politisch-ökonomische oder sozio-ökonomische Bildung einen gesellschaftstheoretisch fundierten Kapitalismusbegriff. Der Ansatz des Dirty Capitalism leistet hierzu einen expliziten Beitrag. Er greift die vielfältige Kritik an Vorstellungen und analytischer Reichweite eines "reinen" Kapitalismus, wie sie z.B. auch im Ansatz des racial capitalism formuliert wird, auf und erweitert die Analyseperspektive über Klassenverhältnisse hinaus auf Rassismus, (Post-)Kolonialismus, Geschlechter- und Naturverhältnisse. Im Band wird das Konzept weiterentwickelt und als Zugang für die kritische politische Bildung und Politikdidaktik diskutiert und empirisch genutzt.
Der Band präsentiert eine systematische Aufbereitung empirischer Befunde zum Lobbyismus in Deutschland und vermittelt, wie Lobbyist*innen, Entscheidungsträger*innen und institutionelle Rahmen miteinander interagieren. Untersucht werden politische Aktivitäten von sozialen Bewegungen, Verbänden, Unternehmen und Beratungsfirmen im Bundestag, der Bundesregierung und der Öffentlichkeit.
The mobile-immobile model (MIM) has been established in geoscience in the context of contaminant transport in groundwater. Here the tracer particles effectively immobilise, e.g., due to diffusion into dead-end pores or sorption. The main idea of the MIM is to split the total particle density into a mobile and an immobile density. Individual tracers switch between the mobile and immobile state following a two-state telegraph process, i.e., the residence times in each state are distributed exponentially. In geoscience the focus lies on the breakthrough curve (BTC), which is the concentration at a fixed location over time. We apply the MIM to biological experiments with a special focus on anomalous scaling regimes of the mean squared displacement (MSD) and non-Gaussian displacement distributions. As an exemplary system, we have analysed the motion of tau proteins, that diffuse freely inside axons of neurons. Their free diffusion thereby corresponds to the mobile state of the MIM. Tau proteins stochastically bind to microtubules, which effectively immobilises the tau proteins until they unbind and continue diffusing. Long immobilisation durations compared to the mobile durations give rise to distinct non-Gaussian Laplace shaped distributions. It is accompanied by a plateau in the MSD for initially mobile tracer particles at relevant intermediate timescales. An equilibrium fraction of initially mobile tracers gives rise to non-Gaussian displacements at intermediate timescales, while the MSD remains linear at all times. In another setting bio molecules diffuse in a biosensor and transiently bind to specific receptors, where advection becomes relevant in the mobile state. The plateau in the MSD observed for the advection-free setting and long immobilisation durations persists also for the case with advection. We find a new clear regime of anomalous diffusion with non-Gaussian distributions and a cubic scaling of the MSD. This regime emerges for initially mobile and for initially immobile tracers. For an equilibrium fraction of initially mobile tracers we observe an intermittent ballistic scaling of the MSD. The long-time effective diffusion coefficient is enhanced by advection, which we physically explain with the variance of mobile durations. Finally, we generalize the MIM to incorporate arbitrary immobilisation time distributions and focus on a Mittag-Leffler immobilisation time distribution with power-law tail ~ t^(-1-mu) with 0<mu<1 and diverging mean immobilisation durations. A fit of our model to the BTC of experimental data from tracer particles in aquifers matches the BTC including the power-law tail. We use the fit parameters for plotting the displacement distributions and the MSD. We find Gaussian normal diffusion at short times and long-time power-law decay of mobile mass accompanied by anomalous diffusion at long times. The long-time diffusion is subdiffusive in the advection-free setting, while it is either subdiffusive for 0<mu<1/2 or superdiffusive for 1/2<mu<1 when advection is present. In the long-time limit we show equivalence of our model to a bi-fractional diffusion equation.
Margrethe, the 80, and who?
(2024)
Aging is associated with bone loss, which can lead to osteoporosis and high fracture risk. This coincides with the enhanced formation of bone marrow adipose tissue (BMAT), suggesting a negative effect of bone marrow adipocytes on skeletal health. Increased BMAT formation is also observed in pathologies such as obesity, type 2 diabetes and osteoporosis. However, a subset of bone marrow adipocytes forming the constitutive BMAT (cBMAT), arise early in life in the distal skeleton, contain high levels of unsaturated fatty acids and are thought to provide a physiological function. Regulated BMAT (rBMAT) forms during aging and obesity in proximal regions of the bone and contain a large proportion of saturated fatty acids. Paradoxically, BMAT accumulation is also enhanced during caloric restriction (CR), a life-span extending dietary intervention. This indicates, that different types of BMAT can form in response to opposing nutritional stimuli with potentially different functions.
To this end, two types of nutritional interventions, CR and high fat diet (HFD), that are both described to induce BMAT accumulation were carried out. CR markedly increased BMAT formation in the proximal tibia and led to a higher proportion of unsaturated fatty acids, making it similar to the physiological cBMAT. Additionally, proximal and diaphyseal tibia regions displayed higher adiponectin expression. In aged mice, CR was associated with an improved trabecular bone structure. Taken together, these findings demonstrate, that the type of BMAT that forms during CR might provide beneficial effects for local bone stem/progenitor cells and metabolic health. The HFD intervention performed in this thesis showed no effect on BMAT accumulation and bone microstructure. RNA Seq analysis revealed alterations in the composition of the collagen-containing extracellular matrix (ECM).
In order to investigate the effects of glucose homeostasis on osteogenesis, differentiation capacity of immortalized multipotent mesenchymal stromal cells (MSCs) and osteochondrogenic progenitor cells (OPCs) was analyzed. Insulin improved differentiation in both cell types, however, combination of with a high glucose concentration led to an impaired mineralization of the ECM. In the MSCs, this was accompanied by the formation of adipocytes, indicating negative effects of the adipocytes formed during hyperglycemic conditions on mineralization processes. However, the altered mineralization pattern and structure of the ECM was also observed in OPCs, which did not form any adipocytes, suggesting further negative effects of a hyperglycemic environment on osteogenic differentiation.
In summary, the work provided in this thesis demonstrated that differentiation commitment of bone-resident stem cells can be altered through nutrient availability, specifically glucose. Surprisingly, both high nutrient supply, e.g. the hyperglycemic cell culture conditions, and low nutrient supply, e.g. CR, can induce adipogenic differentiation. However, while CR-induced adipocyte formation was associated with improved trabecular bone structure, adipocyte formation in a hyperglycemic cell-culture environment hampered mineralization. This thesis provides further evidence for the existence of different types of BMAT with specific functions.
Die 2016 verabschiedeten Sustainable Development Goals (SDGs) der Vereinten Nationen sind Referenzrahmen von Nachhaltigkeitsstrategien auf Bundes- Landes- und kommunaler Ebene geworden. Städte rückten im Zuge der Agenda 2030 in den Mittelpunkt. Ihre Verwaltungen befinden sich dabei in einem herausfordernden Spannungsfeld: Einerseits haben die SDGs den holistischen Anspruch, vollständig in das Handeln der Kommunen integriert zu werden. Andererseits ist für eine effektive Umsetzung eine starke Anpassung der SDGs an den lokalen Kontext notwendig. Die vorliegende Arbeit betrachtet anhand einer Fallstudie die Frage, wie Kommunen die Nachhaltigkeitsziele der Vereinten Nationen in ihre Handlungsprogramme und Nachhaltigkeitsstrategien übersetzen, und welche Faktoren Einfluss auf diesen Prozess haben. Dabei wird ein translationstheoretischer Ansatz verwendet, der die Übertragung einer Idee in einen lokalen Kontext als aktiven Transfer versteht, bei dem das Handeln der beteiligten Akteure und deren Konstruktion der aufzunehmenden Idee im Fokus steht. Die Translation wird mit Hilfe von qualitativen Interviews nachvollzogen und analysiert. Die Ergebnisse zeigen, dass die SDGs zwar anhand ihrer Relevanz für die Kommune gefiltert werden, der normative Anspruch der SDGs aber erhalten bleibt und angesichts des als gering beurteilten Fortschritts der Kommune besonderes Gewicht erhält. Zentrale Einflussfaktoren für die Translation sind die verfügbaren personellen und finanziellen Ressourcen, die Akzeptanz für die SDGs in Verwaltung, Politik und Gesellschaft und nicht zuletzt das persönliche Engagement einzelner Verwaltungsmitarbeiter*innen.
-Ottmar Ette, Ingo Schwarz: „Ein junges, neues Geschlecht wird besseres liefern als das alte“. Ein Empfehlungsbrief Alexander von Humboldts für Carl Ludwig
-GAO Hong: Nachgedanken zur Übersetzung des ersten Bandes von Humboldts Kosmos
-Tobias Kraft: Neue Quellen zu Humboldts Kuba-Forschung. Das „Digitale Dossier“ des Proyecto Humboldt Digital (2019 – 2023)
-Vera Kutzinski: Off-Road Adventures: Reading Statistics in Alexander von Humboldt’s Political Essay on the Kingdom of New Spain
-Krzysztof Zielnica: Alexander von Humboldt und Polen – zum 150. Jahrestag seiner Reise nach Warschau. Mit einleitenden Worten von Ingo Schwarz
This thesis presents a comprehensive exploration of the application of DNA origami nanofork antennas (DONAs) in the field of spectroscopy, with a particular focus on the structural analysis of Cytochrome C (CytC) at the single-molecule level. The research encapsulates the design, optimization, and application of DONAs in enhancing the sensitivity and specificity of Raman spectroscopy, thereby offering new insights into protein structures and interactions.
The initial phase of the study involved the meticulous optimization of DNA origami structures. This process was pivotal in developing nanoscale tools that could significantly enhance the capabilities of Raman spectroscopy. The optimized DNA origami nanoforks, in both dimer and aggregate forms, demonstrated an enhanced ability to detect and analyze molecular vibrations, contributing to a more nuanced understanding of protein dynamics.
A key aspect of this research was the comparative analysis between the dimer and aggregate forms of DONAs. This comparison revealed that while both configurations effectively identified oxidation and spin states of CytC, the aggregate form offered a broader range of detectable molecular states due to its prolonged signal emission and increased number of molecules. This extended duration of signal emission in the aggregates was attributed to the collective hotspot area, enhancing overall signal stability and sensitivity.
Furthermore, the study delved into the analysis of the Amide III band using the DONA system. Observations included a transient shift in the Amide III band's frequency, suggesting dynamic alterations in the secondary structure of CytC. These shifts, indicative of transitions between different protein structures, were crucial in understanding the protein’s functional mechanisms and interactions.
The research presented in this thesis not only contributes significantly to the field of spectroscopy but also illustrates the potential of interdisciplinary approaches in biosensing. The use of DNA origami-based systems in spectroscopy has opened new avenues for research, offering a detailed and comprehensive understanding of protein structures and interactions. The insights gained from this research are expected to have lasting implications in scientific fields ranging from drug development to the study of complex biochemical pathways. This thesis thus stands as a testament to the power of integrating nanotechnology, biochemistry, and spectroscopic techniques in addressing complex scientific questions.
Knowledge about causal structures is crucial for decision support in various domains. For example, in discrete manufacturing, identifying the root causes of failures and quality deviations that interrupt the highly automated production process requires causal structural knowledge. However, in practice, root cause analysis is usually built upon individual expert knowledge about associative relationships. But, "correlation does not imply causation", and misinterpreting associations often leads to incorrect conclusions. Recent developments in methods for causal discovery from observational data have opened the opportunity for a data-driven examination. Despite its potential for data-driven decision support, omnipresent challenges impede causal discovery in real-world scenarios. In this thesis, we make a threefold contribution to improving causal discovery in practice.
(1) The growing interest in causal discovery has led to a broad spectrum of methods with specific assumptions on the data and various implementations. Hence, application in practice requires careful consideration of existing methods, which becomes laborious when dealing with various parameters, assumptions, and implementations in different programming languages. Additionally, evaluation is challenging due to the lack of ground truth in practice and limited benchmark data that reflect real-world data characteristics.
To address these issues, we present a platform-independent modular pipeline for causal discovery and a ground truth framework for synthetic data generation that provides comprehensive evaluation opportunities, e.g., to examine the accuracy of causal discovery methods in case of inappropriate assumptions.
(2) Applying constraint-based methods for causal discovery requires selecting a conditional independence (CI) test, which is particularly challenging in mixed discrete-continuous data omnipresent in many real-world scenarios. In this context, inappropriate assumptions on the data or the commonly applied discretization of continuous variables reduce the accuracy of CI decisions, leading to incorrect causal structures.
Therefore, we contribute a non-parametric CI test leveraging k-nearest neighbors methods and prove its statistical validity and power in mixed discrete-continuous data, as well as the asymptotic consistency when used in constraint-based causal discovery. An extensive evaluation of synthetic and real-world data shows that the proposed CI test outperforms state-of-the-art approaches in the accuracy of CI testing and causal discovery, particularly in settings with low sample sizes.
(3) To show the applicability and opportunities of causal discovery in practice, we examine our contributions in real-world discrete manufacturing use cases. For example, we showcase how causal structural knowledge helps to understand unforeseen production downtimes or adds decision support in case of failures and quality deviations in automotive body shop assembly lines.
This study on the Messianic Jewish movement and its relationship to the Torah explores the various aspects of the relationship to the Torah on the basis of 10 interviews with selected Yeshua-believing Jews in leadership positions. The selection of interviewees results in a range of different positions typical of the movement as a whole, which overlap in many respects but are often fundamentally different and sometimes contradictory. Particular attention is paid to the theologically based, divergent and contradictory positions in an attempt to make these understandable.
After a brief introduction to the Messianic Jewish movement, aspects of the Messianic Jewish dual identity are examined and their relevance for the relationship to the Torah is demonstrated. This is followed by an overview of the forums in which Yeshua-believing Jews discuss their relationship to the Torah. The extensive bibliography at the end of the work provides an insight into a lively discussion process within the movement that is still far from complete. A briefly annotated differentiation of terms serves as an overview of the most important meanings of Torah used in the Messianic Jewish movement. Following this preliminary work, the field study is presented. A description of the research field and methodological reflections precede the interviews. In the interviews, the associations with the term Torah are first recorded and the conceptual meaning and use clarified. This already reveals some serious differences. The theological positions and understandings of Torah are presented with the biographical context and main field of influence, and the most important formative influences are named. The points on which they all agree are noted first, as they serve as a common basis. All study the written Torah and consider it, as well as the rest of the Tanakh and the writings of the New Testament in their present form, to be divinely inspired and authoritative. All have found a positive approach to the Torah according to their own definition of the term. For all of them, the written Torah and the Tanakh point to Yeshua. All agree that Yeshua did not abrogate the Torah, but fulfilled it. And all feel a responsibility as a Jew to the Torah in some way. With regard to keeping commandments, all say that no one can earn their way to heaven by doing so. G-d's faithfulness to His promises to Israel is affirmed by all, but whether the new covenant in Yeshua superseded the old covenant of Mt. Sinai, or whether it is simply added to the already existing covenant of Sinai, whether ritual commandments are to continue to be kept after Yeshua's death and resurrection and the destruction of the Temple, whether the commandments aiming at separation from the nations should continue to be kept, whether and under what conditions rabbinic halacha should be followed and what individuals do and teach in their families and communities - all this is discussed interview by interview. It becomes clear how different ways of reading and weighting key scriptures produce different positions. Just as the diversity of positions in relation to the Torah already suggests, the interview partners are divided on the question of a Messianic Jewish Halacha. But here too, the term halacha is interpreted differently by the representatives. At the end of the field study, the attempts to produce Messianic Jewish Halacha and the problems and points of criticism expressed by other interviewees are explained. The work concludes with a theological framework able to contain all the different positions and relationships to the Torah and some starting points for a possible Messianic Jewish hermeneutic theology of the Torah.
The Arctic is the hot spot of the ongoing, global climate change. Over the last decades, near-surface temperatures in the Arctic have been rising almost four times faster than on global average. This amplified warming of the Arctic and the associated rapid changes of its environment are largely influenced by interactions between individual components of the Arctic climate system. On daily to weekly time scales, storms can have major impacts on the Arctic sea-ice cover and are thus an important part of these interactions within the Arctic climate. The sea-ice impacts of storms are related to high wind speeds, which enhance the drift and deformation of sea ice, as well as to changes in the surface energy budget in association with air mass advection, which impact the seasonal sea-ice growth and melt.
The occurrence of storms in the Arctic is typically associated with the passage of transient cyclones. Even though the above described mechanisms how storms/cyclones impact the Arctic sea ice are in principal known, there is a lack of statistical quantification of these effects. In accordance with that, the overarching objective of this thesis is to statistically quantify cyclone impacts on sea-ice concentration (SIC) in the Atlantic Arctic Ocean over the last four decades. In order to further advance the understanding of the related mechanisms, an additional objective is to separate dynamic and thermodynamic cyclone impacts on sea ice and assess their relative importance. Finally, this thesis aims to quantify recent changes in cyclone impacts on SIC. These research objectives are tackled utilizing various data sets, including atmospheric and oceanic reanalysis data as well as a coupled model simulation and a cyclone tracking algorithm.
Results from this thesis demonstrate that cyclones are significantly impacting SIC in the Atlantic Arctic Ocean from autumn to spring, while there are mostly no significant impacts in summer. The strength and the sign (SIC decreasing or SIC increasing) of the cyclone impacts strongly depends on the considered daily time scale and the region of the Atlantic Arctic Ocean. Specifically, an initial decrease in SIC (day -3 to day 0 relative to the cyclone) is found in the Greenland, Barents and Kara Seas, while SIC increases following cyclones (day 0 to day 5 relative to the cyclone) are mostly limited to the Barents and Kara Seas.
For the cold season, this results in a pronounced regional difference between overall (day -3 to day 5 relative to the cyclone) SIC-decreasing cyclone impacts in the Greenland Sea and overall SIC-increasing cyclone impacts in the Barents and Kara Seas. A cyclone case study based on a coupled model simulation indicates that both dynamic and thermodynamic mechanisms contribute to cyclone impacts on sea ice in winter. A typical pattern consisting of an initial dominance of dynamic sea-ice changes followed by enhanced thermodynamic ice growth after the cyclone passage was found. This enhanced ice growth after the cyclone passage most likely also explains the (statistical) overall SIC-increasing effects of cyclones in the Barents and Kara Seas in the cold season.
Significant changes in cyclone impacts on SIC over the last four decades have emerged throughout the year. These recent changes are strongly varying from region to region and month to month. The strongest trends in cyclone impacts on SIC are found in autumn in the Barents and Kara Seas. Here, the magnitude of destructive cyclone impacts on SIC has approximately doubled over the last four decades. The SIC-increasing effects following the cyclone passage have particularly weakened in the Barents Sea in autumn. As a consequence, previously existing overall SIC-increasing cyclone impacts in this region in autumn have recently disappeared. Generally, results from this thesis show that changes in the state of the sea-ice cover (decrease in mean sea-ice concentration and thickness) and near-surface air temperature are most important for changed cyclone impacts on SIC, while changes in cyclone properties (i.e. intensity) do not play a significant role.
Assessing the impact of global change on hydrological systems is one of the greatest hydrological challenges of our time. Changes in land cover, land use, and climate have an impact on water quantity, quality, and temporal availability. There is a widespread consensus that, given the far-reaching effects of global change, hydrological systems can no longer be viewed as static in their structure; instead, they must be regarded as entire ecosystems, wherein hydrological processes interact and coevolve with biological, geomorphological, and pedological processes. To accurately predict the hydrological response under the impact of global change, it is essential to understand this complex coevolution. The knowledge of how hydrological processes, in particular the formation of subsurface (preferential) flow paths, evolve within this coevolution and how they feed back to the other processes is still very limited due to a lack of observational data.
At the hillslope scale, this intertwined system of interactions is known as the hillslope feedback cycle. This thesis aims to enhance our understanding of the hillslope feedback cycle by studying the coevolution of hillslope structure and hillslope hydrological response. Using chronosequences of moraines in two glacial forefields developed from siliceous and calcareous glacial till, the four studies shed light on the complex coevolution of hydrological, biological, and structural hillslope properties, as well as subsurface hydrological flow paths over an evolutionary period of 10 millennia in these two contrasting geologies. The findings indicate that the contrasting properties of siliceous and calcareous parent materials lead
to variations in soil structure, permeability, and water storage. As a result, different plant species and vegetation types are favored on siliceous versus calcareous parent material, leading to diverse ecosystems with distinct hydrological dynamics. The siliceous parent material was found to show a higher activity level in driving the coevolution. The soil pH resulting from parent material weathering emerges as a crucial factor, influencing vegetation development, soil formation, and consequently, hydrology. The acidic weathering of the siliceous parent material favored the accumulation of organic matter, increasing the soils’ water storage capacity and attracting acid-loving shrubs, which further promoted organic matter accumulation and ultimately led to podsolization after 10 000 years. Tracer experiments revealed that the subsurface flow path evolution was influenced by soil and vegetation development, and vice versa. Subsurface flow paths changed from vertical, heterogeneous matrix flow to finger-like flow paths over a few hundred years, evolving into macropore flow, water storage, and lateral subsurface flow after several thousand years. The changes in flow paths among younger age classes were driven by weathering processes altering soil structure, as well as by vegetation development and root activity. In the older age
class, the transition to more water storage and lateral flow was attributed to substantial organic matter accumulation and ongoing podsolization. The rapid vertical water transport in the finger-like flow paths, along with the conductive sandy material, contributed to podsolization and thus to the shift in the hillslope hydrological response.
In contrast, the calcareous site possesses a high pH buffering capacity, creating a neutral to basic environment with relatively low accumulation of dead organic matter, resulting in a lower water storage capacity and the establishment of predominantly grass vegetation. The coevolution was found to be less dynamic over the millennia. Similar to the siliceous site, significant changes in subsurface flow paths occurred between the young age classes. However, unlike the siliceous site, the subsurface flow paths at the calcareous site only altered in shape and not in direction. Tracer experiments showed that flow paths changed from vertical, heterogeneous matrix flow to vertical, finger-like flow paths after a few hundred to thousands of years, which was driven by root activities and weathering processes. Despite having a finer soil texture, water storage at the calcareous site was significantly lower than at the siliceous site, and water transport remained primarily rapid and vertical, contributing to the flourishing of grass vegetation.
The studies elucidated that changes in flow paths are predominantly shaped by the characteristics of the parent material and its weathering products, along with their complex interactions with initial water flow paths and vegetation development. Time, on the other hand, was not found to be a primary factor in describing the evolution of the hydrological response. This thesis makes a valuable contribution to closing the gap in the observations of the coevolution of hydrological processes within the hillslope feedback cycle, which is important to improve predictions of hydrological processes in changing landscapes. Furthermore, it emphasizes the importance of interdisciplinary studies in addressing the hydrological challenges arising from global change.
Rapidly growing seismic and macroseismic databases and simplified access to advanced machine learning methods have in recent years opened up vast opportunities to address challenges in engineering and strong motion seismology from novel, datacentric perspectives. In this thesis, I explore the opportunities of such perspectives for the tasks of ground motion modeling and rapid earthquake impact assessment, tasks with major implications for long-term earthquake disaster mitigation.
In my first study, I utilize the rich strong motion database from the Kanto basin, Japan, and apply the U-Net artificial neural network architecture to develop a deep learning based ground motion model. The operational prototype provides statistical estimates of expected ground shaking, given descriptions of a specific earthquake source, wave propagation paths, and geophysical site conditions. The U-Net interprets ground motion data in its spatial context, potentially taking into account, for example, the geological properties in the vicinity of observation sites. Predictions of ground motion intensity are thereby calibrated to individual observation sites and earthquake locations.
The second study addresses the explicit incorporation of rupture forward directivity into ground motion modeling. Incorporation of this phenomenon, causing strong, pulse like ground shaking in the vicinity of earthquake sources, is usually associated with an intolerable increase in computational demand during probabilistic seismic hazard analysis (PSHA) calculations. I suggest an approach in which I utilize an artificial neural network to efficiently approximate the average, directivity-related adjustment to ground motion predictions for earthquake ruptures from the 2022 New Zealand National Seismic Hazard Model. The practical implementation in an actual PSHA calculation demonstrates the efficiency and operational readiness of my model. In a follow-up study, I present a proof of concept for an alternative strategy in which I target the generalizing applicability to ruptures other than those from the New Zealand National Seismic Hazard Model.
In the third study, I address the usability of pseudo-intensity reports obtained from macroseismic observations by non-expert citizens for rapid impact assessment. I demonstrate that the statistical properties of pseudo-intensity collections describing the intensity of shaking are correlated with the societal impact of earthquakes. In a second step, I develop a probabilistic model that, within minutes of an event, quantifies the probability of an earthquake to cause considerable societal impact. Under certain conditions, such a quick and preliminary method might be useful to support decision makers in their efforts to organize auxiliary measures for earthquake disaster response while results from more elaborate impact assessment frameworks are not yet available.
The application of machine learning methods to datasets that only partially reveal characteristics of Big Data, qualify the majority of results obtained in this thesis as explorative insights rather than ready-to-use solutions to real world problems. The practical usefulness of this work will be better assessed in the future by applying the approaches developed to growing and increasingly complex data sets.
Heat stress (HS) is a major abiotic stress that negatively affects plant growth and productivity. However, plants have developed various adaptive mechanisms to cope with HS, including the acquisition and maintenance of thermotolerance, which allows them to respond more effectively to subsequent stress episodes. HS memory includes type II transcriptional memory which is characterized by enhanced re-induction of a subset of HS memory genes upon recurrent HS. In this study, new regulators of HS memory in A. thaliana were identified through the characterization of rein mutants.
The rein1 mutant carries a premature stop in CYCLIN-DEPENDENT-KINASE 8 (CDK8) which is part of the cyclin kinase module of the Mediator complex. Rein1 seedlings show impaired type II transcriptional memory in multiple heat-responsive genes upon re-exposure to HS. Additionally, the mutants exhibit a significant deficiency in HS memory at the physiological level. Interaction studies conducted in this work indicate that CDK8 associates with the memory HEAT SHOCK FACTORs HSAF2 and HSFA3. The results suggest that CDK8 plays a crucial role in HS memory in plants together with other memory HSFs, which may be potential targets of the CDK8 kinase function. Understanding the role and interaction network of the Mediator complex during HS-induced transcriptional memory will be an exciting aspect of future HS memory research.
The second characterized mutant, rein2, was selected based on its strongly impaired pAPX2::LUC re-induction phenotype. In gene expression analysis, the mutant revealed additional defects in the initial induction of HS memory genes. Along with this observation, basal thermotolerance was impaired similarly as HS memory at the physiological level in rein2. Sequencing of backcrossed bulk segregants with subsequent fine mapping narrowed the location of REIN2 to a 1 Mb region on chromosome 1. This interval contains the At1g65440 gene, which encodes the histone chaperone SPT6L. SPT6L interacts with chromatin remodelers and bridges them to the transcription machinery to regulate nucleosome and Pol II occupancy around the transcriptional start site. The EMS-induced missense mutation in SPT6L may cause altered HS-induced gene expression in rein2, possibly triggered by changes in the chromatin environment resulting from altered histone chaperone function.
Expanding research on screen-derived factors that modify type II transcriptional memory has the potential to enhance our understanding of HS memory in plants. Discovering connections between previously identified memory factors will help to elucidate the underlying network of HS memory. This knowledge can initiate new approaches to improve heat resilience in crops.
Jahresbericht 2023
(2024)
Dieser Jahresbericht umfasst den Berichtszeitraum 2023, in dem Forschung und Lehre wieder in Präsenz stattfinden konnten. Begegnung und Austausch in Hörsaal und Seminarraum, auf Konferenzpaneln und während Kaffeepausen sind wieder möglich, aber die Möglichkeiten von Homeoffice und Onlinekommunikation bleiben weiter bestehen, wie die Erfahrung zeigt.
Das MenschenRechtsZentrum als interdisziplinär arbeitende, zentrale wissenschaftliche Einrichtung der Universität Potsdam hat es im Berichtszeitraum erneut unternommen, juristische, philosophische, geschichts- und kultur- sowie politikwissenschaftliche Perspektiven auf das Thema Menschenrechte in Forschung und Lehre miteinander zu verbinden.
Die Wissenschaftler*innen des MenschenRechtsZentrums lehren an den Fakultäten, denen sie angehören. Hier werden daher nur diejenigen Aktivitäten angeführt, die einen Bezug zur Arbeit des MenschenRechtsZentrums sowie zu menschenrechtlichen Fragestellungen haben; weitergehende Informationen finden sich auf den Homepages der jeweiligen Personen.
The reliance on fossil fuels has resulted in an abnormal increase in the concentration of greenhouse gases, contributing to the global climate crisis. In response, a rapid transition to renewable energy sources has begun, particularly lithium-ion batteries, playing a crucial role in the green energy transformation. However, concerns regarding the availability and geopolitical implications of lithium have prompted the exploration of alternative rechargeable battery systems, such as sodium-ion batteries. Sodium is significantly abundant and more homogeneously distributed in the crust and seawater, making it easier and less expensive to extract than lithium. However, because of the mysterious nature of its components, sodium-ion batteries are not yet sufficiently advanced to take the place of lithium-ion batteries. Specifically, sodium exhibits a more metallic character and a larger ionic radius, resulting in a different ion storage mechanism utilized in lithium-ion batteries. Innovations in synthetic methods, post-treatments, and interface engineering clearly demonstrate the significance of developing high-performance carbonaceous anode materials for sodium-ion batteries. The objective of this dissertation is to present a systematic approach for fabricating efficient, high-performance, and sustainable carbonaceous anode materials for sodium-ion batteries. This will involve a comprehensive investigation of different chemical environments and post-modification techniques as well.
This dissertation focuses on three main objectives. Firstly, it explores the significance of post-synthetic methods in designing interfaces. A conformal carbon nitride coating is deposited through chemical vapor deposition on a carbon electrode as an artificial solid-electrolyte interface layer, resulting in improved electrochemical performance. The interaction between the carbon nitride artificial interface and the carbon electrode enhances initial Coulombic efficiency, rate performance, and total capacity. Secondly, a novel process for preparing sulfur-rich carbon as a high-performing anode material for sodium-ion batteries is presented. The method involves using an oligo-3,4-ethylenedioxythiophene precursor for high sulfur content hard carbon anode to investigate the sulfur heteroatom effect on the electrochemical sodium storage mechanism. By optimizing the condensation temperature, a significant transformation in the materials’ nanostructure is achieved, leading to improved electrochemical performance. The use of in-operando small-angle X-ray scattering provides valuable insights into the interaction between micropores and sodium ions during the electrochemical processes. Lastly, the development of high-capacity hard carbon, derived from 5-hydroxymethyl furfural, is examined. This carbon material exhibits exceptional performance at both low and high current densities. Extensive electrochemical and physicochemical characterizations shed light on the sodium storage mechanism concerning the chemical environment, establishing the material’s stability and potential applications in sodium-ion batteries.
Werner Krause and Christina Gahn argue that we need to pay more attention to how the media communicates the results of opinion polls to the public. Reporting methodological details, such as margins of error, can alter citizens’ vote choices on election day. This has important implications for elections around the world
Kants Recht der Freiheit
(2024)
Das vorliegende Buch berücksichtigt neben den drei Kritiken und der späten Rechtslehre Kants Grundlegung zur Metaphysik der Sitten, seine Anthropologie in pragmatischer Hinsicht, den Weltbürgeressay, den Streit der Fakultäten, die Friedensschrift und die Abhandlung über den Gemeinspruch, aus der die Formulierung ‚Recht der Freiheit‘ stammt.
Erstes Kant-Buch zu seiner eigenen Wortschöpfung "Recht der Freiheit".
Erörtert Kants "Rechtslehre und Gerichtsbarkeit" in der Kritik der reinen Vernunft
This work analyzed functional and regulatory aspects of the so far little characterized EPSIN N-terminal Homology (ENTH) domain-containing protein EPSINOID2 in Arabidopsis thaliana. ENTH domain proteins play accessory roles in the formation of clathrin-coated vesicles (CCVs) (Zouhar and Sauer 2014). Their ENTH domain interacts with membranes and their typically long, unstructured C-terminus contains binding motifs for adaptor protein complexes and clathrin itself. There are seven ENTH domain proteins in Arabidopsis. Four of them possess the canonical long C-terminus and participate in various, presumably CCV-related intracellular transport processes (Song et al. 2006; Lee et al. 2007; Sauer et al. 2013; Collins et al. 2020; Heinze et al. 2020; Mason et al. 2023). The remaining three ENTH domain proteins, however, have severely truncated C-termini and were termed EPSINOIDs (Zouhar and Sauer 2014; Freimuth 2015). Their functions are currently unclear. Preceding studies focusing on EPSINOID2 indicated a role in root hair formation: epsinoid2 T DNA mutants exhibited an increased root hair density and EPSINOID2-GFP was specifically located in non-hair cell files in the Arabidopsis root epidermis (Freimuth 2015, 2019).
In this work, it was clearly shown that loss of EPSINOID2 leads to an increase in root hair density through analyses of three independent mutant alleles, including a newly generated CRISPR/Cas9 full deletion mutant. The ectopic root hairs emerging from non-hair positions in all epsinoid2 mutant alleles are most likely not a consequence of altered cell fate, because extensive genetic analyses placed EPSINOID2 downstream of the established epidermal patterning network. Thus, EPSINOID2 seems to act as a cell autonomous inhibitor of root hair formation. Attempts to confirm this hypothesis by ectopically overexpressing EPSINOID2 led to the discovery of post-transcriptional and -translational regulation through different mechanisms. One involves the little characterized miRNA844-3p. Interference with this pathway resulted in ectopic EPSINOID2 overexpression and decreased root hair density, confirming it as negative factor in root hair formation. A second mechanism likely involves proteasomal degradation. Treatment with proteasomal inhibitor MG132 led to EPSINOID2-GFP accumulation, and a KEN box degron motif was identified in the EPSINOID2 sequence associated with degradation through a ubiquitin/proteasome-dependent pathway. In line with a tight dose regulation, genetic analyses of all three mutant alleles indicate that EPSINOID2 is haploinsufficient. Lastly, it was revealed that, although EPSINOID2 promoter activity was found in all epidermal cells, protein accumulation was observed in N-cells only, hinting at yet another layer of regulation.
Gut zwei Jahrzehnte nach dem Millenniumsgipfel der Vereinten Nationen bleiben berechtigte Zweifel an der Wirksamkeit von Entwicklungszusammenarbeit (EZ). Ist das Politikfeld von den Realitäten überholt worden? Welchen Beitrag haben Entwicklungstheorien für die Weiterentwicklung von Entwicklungspolitik leisten können? Der Beitrag zieht eine Bilanz, die von der ersten Entwicklungsdekade in den 1960er-Jahren bis zu den Folgen der Covid-19-Pandemie reicht. Er plädiert für eine herrschaftskritische Weiterentwicklung des Entwicklungsbegriffs und für eine Stärkung globaler Kooperation.
Diskursive Perspektiven auf internationale Politik haben in den vergangenen Jahren an Relevanz und Popularität gewonnen. Der vorliegende Beitrag gibt zunächst einen Überblick über verschiedene Spielarten diskursiver Ansätze in den Internationalen Beziehungen, um sich dann vor allem poststrukturalistisch inspirierten Diskursarbeiten zu widmen. Poststrukturalistische Ansätze, so argumentieren wir, sind besonders interessant für die Disziplin der IB, da sie vier spezifische Gewinne bieten: Erstens erlauben sie eine kritische Perspektive auf Fragen internationaler Politik, zweitens hilft eine poststrukturalistische Perspektive dabei, den oft übersehenen politischen Charakter sozialer Realität herauszustellen, drittens halten sie dazu an, die eigene Sichtweise des/der Forschenden zu reflektieren und viertens erlaubt es eine poststrukturalistische Vorgehensweise mit ihrem Fokus auf „Wie-möglich-Fragen“, eine alternative analytische Perspektive zu dominanten erklärenden Ansätzen einzunehmen.
Improving permafrost dynamics in land surface models: insights from dual sensitivity experiments
(2024)
The thawing of permafrost and the subsequent release of greenhouse gases constitute one of the most significant and uncertain positive feedback loops in the context of climate change, making predictions regarding changes in permafrost coverage of paramount importance. To address these critical questions, climate scientists have developed Land Surface Models (LSMs) that encompass a multitude of physical soil processes. This thesis is committed to advancing our understanding and refining precise representations of permafrost dynamics within LSMs, with a specific focus on the accurate modeling of heat fluxes, an essential component for simulating permafrost physics.
The first research question overviews fundamental model prerequisites for the representation of permafrost soils within land surface modeling. It includes a first-of-its-kind comparison between LSMs in CMIP6 to reveal their differences and shortcomings in key permafrost physics parameters. Overall, each of these LSMs represents a unique approach to simulating soil processes and their interactions with the climate system. Choosing the most appropriate model for a particular application depends on factors such as the spatial and temporal scale of the simulation, the specific research question, and available computational resources.
The second research question evaluates the performance of the state-of-the-art Community Land Model (CLM5) in simulating Arctic permafrost regions. Our approach overcomes traditional evaluation limitations by individually addressing depth, seasonality, and regional variations, providing a comprehensive assessment of permafrost and soil temperature dynamics. I compare CLM5's results with three extensive datasets: (1) soil temperatures from 295 borehole stations, (2) active layer thickness (ALT) data from the Circumpolar Active Layer Monitoring Network (CALM), and (3) soil temperatures, ALT, and permafrost extent from the ESA Climate Change Initiative (ESA-CCI). The results show that CLM5 aligns well with ESA-CCI and CALM for permafrost extent and ALT but reveals a significant global cold temperature bias, notably over Siberia. These results echo a persistent challenge identified in numerous studies: the existence of a systematic 'cold bias' in soil temperature over permafrost regions. To address this challenge, the following research questions propose dual sensitivity experiments.
The third research question represents the first study to apply a Plant Functional Type (PFT)-based approach to derive soil texture and soil organic matter (SOM), departing from the conventional use of coarse-resolution global data in LSMs. This novel method results in a more uniform distribution of soil organic matter density (OMD) across the domain, characterized by reduced OMD values in most regions. However, changes in soil texture exhibit a more intricate spatial pattern. Comparing the results to observations reveals a significant reduction in the cold bias observed in the control run. This method shows noticeable improvements in permafrost extent, but at the cost of an overestimation in ALT. These findings emphasize the model's high sensitivity to variations in soil texture and SOM content, highlighting the crucial role of soil composition in governing heat transfer processes and shaping the seasonal variation of soil temperatures in permafrost regions.
Expanding upon a site experiment conducted in Trail Valley Creek by \citet{dutch_impact_2022}, the fourth research question extends the application of the snow scheme proposed by \citet{sturm_thermal_1997} to cover the entire Arctic domain. By employing a snow scheme better suited to the snow density profile observed over permafrost regions, this thesis seeks to assess its influence on simulated soil temperatures. Comparing this method to observational datasets reveals a significant reduction in the cold bias that was present in the control run. In most regions, the Sturm run exhibits a substantial decrease in the cold bias. However, there is a distinctive overshoot with a warm bias observed in mountainous areas. The Sturm experiment effectively addressed the overestimation of permafrost extent in the control run, albeit resulting in a substantial reduction in permafrost extent over mountainous areas. ALT results remain relatively consistent compared to the control run. These outcomes align with our initial hypothesis, which anticipated that the reduced snow insulation in the Sturm run would lead to higher winter soil temperatures and a more accurate representation of permafrost physics.
In summary, this thesis demonstrates significant advancements in understanding permafrost dynamics and its integration into LSMs. It has meticulously unraveled the intricacies involved in the interplay between heat transfer, soil properties, and snow dynamics in permafrost regions. These insights offer novel perspectives on model representation and performance.
A comprehensive study on seismic hazard and earthquake triggering is crucial for effective mitigation of earthquake risks. The destructive nature of earthquakes motivates researchers to work on forecasting despite the apparent randomness of the earthquake occurrences. Understanding their underlying mechanisms and patterns is vital, given their potential for widespread devastation and loss of life. This thesis combines methodologies, including Coulomb stress calculations and aftershock analysis, to shed light on earthquake complexities, ultimately enhancing seismic hazard assessment.
The Coulomb failure stress (CFS) criterion is widely used to predict the spatial distributions of aftershocks following large earthquakes. However, uncertainties associated with CFS calculations arise from non-unique slip inversions and unknown fault networks, particularly due to the choice of the assumed aftershocks (receiver) mechanisms. Recent studies have proposed alternative stress quantities and deep neural network approaches as superior to CFS with predefined receiver mechanisms. To challenge these propositions, I utilized 289 slip inversions from the SRCMOD database to calculate more realistic CFS values for a layered-half space and variable receiver mechanisms. The analysis also investigates the impact of magnitude cutoff, grid size variation, and aftershock duration on the ranking of stress metrics using receiver operating characteristic (ROC) analysis. Results reveal the performance of stress metrics significantly improves after accounting for receiver variability and for larger aftershocks and shorter time periods, without altering the relative ranking of the different stress metrics.
To corroborate Coulomb stress calculations with the findings of earthquake source studies in more detail, I studied the source properties of the 2005 Kashmir earthquake and its aftershocks, aiming to unravel the seismotectonics of the NW Himalayan syntaxis. I simultaneously relocated the mainshock and its largest aftershocks using phase data, followed by a comprehensive analysis of Coulomb stress changes on the aftershock planes. By computing the Coulomb failure stress changes on the aftershock faults, I found that all large aftershocks lie in regions of positive stress change, indicating triggering by either co-seismic or post-seismic slip on the mainshock fault.
Finally, I investigated the relationship between mainshock-induced stress changes and associated seismicity parameters, in particular those of the frequency-magnitude (Gutenberg-Richter) distribution and the temporal aftershock decay (Omori-Utsu law). For that purpose, I used my global data set of 127 mainshock-aftershock sequences with the calculated Coulomb Stress (ΔCFS) and the alternative receiver-independent stress metrics in the vicinity of the mainshocks and analyzed the aftershocks properties depend on the stress values. Surprisingly, the results show a clear positive correlation between the Gutenberg-Richter b-value and induced stress, contrary to expectations from laboratory experiments. This observation highlights the significance of structural heterogeneity and strength variations in seismicity patterns. Furthermore, the study demonstrates that aftershock productivity increases nonlinearly with stress, while the Omori-Utsu parameters c and p systematically decrease with increasing stress changes. These partly unexpected findings have significant implications for future estimations of aftershock hazard.
The findings in this thesis provides valuable insights into earthquake triggering mechanisms by examining the relationship between stress changes and aftershock occurrence. The results contribute to improved understanding of earthquake behavior and can aid in the development of more accurate probabilistic-seismic hazard forecasts and risk reduction strategies.
In this visualization, the authors show changes in family patterns by different race groups across two cohorts. Using data from the National Longitudinal Survey of Youth 1979 (born from 1957 to 1965) and 1997 (born from 1980 to 1984), the authors visualize the relationship-parenthood state distributions at each age between 15 and 35 years by race and cohort. The results suggest the rise of cohabiting mothers and the decline of married and divorced mothers among women born from 1980 to 1984. Black women born from 1980 to 1984 were more likely to experience single/childless and single/parent status compared with Black women born from 1957 to 1965. Although with some visible postponement in the recent cohort, white women in both cohorts were more likely to experience married/parent status than other race groups. The decline in married/parent status across the two generations was sharpest among Hispanic women. These descriptive findings highlight the importance of identifying race when discussing changes in family formation and dissolution trends across generations.
Invisible iterations: how formal and informal organization shape knowledge networks for coordination
(2024)
This study takes a network approach to investigate coordination among knowledge workers as grounded in both formal and informal organization. We first derive hypotheses regarding patterns of knowledge-sharing relationships by which workers pass on and exchange tacit and codified knowledge within and across organizational hierarchies to address the challenges that underpin contemporary knowledge work. We use survey data and apply exponential random graph models to test our hypotheses. We then extend the quantitative network analysis with insights from qualitative interviews and demonstrate that the identified knowledge-sharing patterns are the micro-foundational traces of collective coordination resulting from two underlying coordination mechanisms which we label ‘invisible iterations’ and ‘bringing in the big guns’. These mechanisms and, by extension, the associated knowledge-sharing patterns enable knowledge workers to perform in a setting that is characterized by complexity, uncertainty and ambiguity. Our research contributes to theory on the interplay between formal and informal organization for coordination by showing how self-directed, informal action is supported by the formal organizational hierarchy. In doing so, it also extends understanding of the role that hierarchy plays for knowledge-intensive work. Finally, it establishes the collective need to coordinate work as a previously overlooked driver of knowledge network relationships and network patterns. © 2024 The Authors. Journal of Management Studies published by Society for the Advancement of Management Studies and John Wiley & Sons Ltd.
Column-oriented database systems can efficiently process transactional and analytical queries on a single node. However, increasing or peak analytical loads can quickly saturate single-node database systems. Then, a common scale-out option is using a database cluster with a single primary node for transaction processing and read-only replicas. Using (the naive) full replication, queries are distributed among nodes independently of the accessed data. This approach is relatively expensive because all nodes must store all data and apply all data modifications caused by inserts, deletes, or updates.
In contrast to full replication, partial replication is a more cost-efficient implementation: Instead of duplicating all data to all replica nodes, partial replicas store only a subset of the data while being able to process a large workload share. Besides lower storage costs, partial replicas enable (i) better scaling because replicas must potentially synchronize only subsets of the data modifications and thus have more capacity for read-only queries and (ii) better elasticity because replicas have to load less data and can be set up faster. However, splitting the overall workload evenly among the replica nodes while optimizing the data allocation is a challenging assignment problem.
The calculation of optimized data allocations in a partially replicated database cluster can be modeled using integer linear programming (ILP). ILP is a common approach for solving assignment problems, also in the context of database systems. Because ILP is not scalable, existing approaches (also for calculating partial allocations) often fall back to simple (e.g., greedy) heuristics for larger problem instances. Simple heuristics may work well but can lose optimization potential.
In this thesis, we present optimal and ILP-based heuristic programming models for calculating data fragment allocations for partially replicated database clusters. Using ILP, we are flexible to extend our models to (i) consider data modifications and reallocations and (ii) increase the robustness of allocations to compensate for node failures and workload uncertainty. We evaluate our approaches for TPC-H, TPC-DS, and a real-world accounting workload and compare the results to state-of-the-art allocation approaches. Our evaluations show significant improvements for varied allocation’s properties: Compared to existing approaches, we can, for example, (i) almost halve the amount of allocated data, (ii) improve the throughput in case of node failures and workload uncertainty while using even less memory, (iii) halve the costs of data modifications, and (iv) reallocate less than 90% of data when adding a node to the cluster. Importantly, we can calculate the corresponding ILP-based heuristic solutions within a few seconds. Finally, we demonstrate that the ideas of our ILP-based heuristics are also applicable to the index selection problem.
With the surging reliance on videoconferencing tools, users may find themselves staring at their reflections for hours a day. We refer to this phenomenon as self-referential information (SRI) consumption and examine its consequences and the mechanism behind them. Building on self-awareness research and the strength model of self-control, we argue that SRI consumption heightens the state of self-awareness and thereby depletes participants’ mental resources, eventually undermining virtual meeting (VM) outcomes. Our findings from a European employee sample revealed contrary effects of SRI consumption across speaker vs listener roles. Engagement with self-view is positively associated with self-awareness, which, in turn, is negatively related to satisfaction with VM process, perceived productivity, and enjoyment. Looking at the self while listening to others exhibits adverse direct and indirect (via self-awareness) effects on VM outcomes. However, looking at the self when speaking exhibits positive direct effects on satisfaction with VM process and enjoyment.
Enhancing higher entrepreneurship education: insights from practitioners for curriculum improvement
(2024)
Curricula for higher entrepreneurship education should meet the requirements of both a solid theoretical foundation and a practical orientation. When these curricula are designed by education specialists, entrepreneurs are usually not consulted. To explore practitioners’ curricular recommendations, we conducted 73 semi-structured interviews with entrepreneurs with at least five years of professional experience. We collected 49 items for teaching and learning objectives, 37 for contents, 28 for teaching methods, and 17 for assessment methods. The respondents are convinced that students should acquire solid knowledge in business and management, legal issues, and entrepreneurship. For the latter, only some core aspects are provided. The entrepreneurs put greater emphasis on entrepreneurial skills and attitudes and consider experiential learning designs as most suitable, both in the secure setting of the classroom and in real life. The findings can help reflect on current entrepreneurship curriculum designs.
Volatile supply and sales markets, coupled with increasing product individualization and complex production processes, present significant challenges for manufacturing companies. These must navigate and adapt to ever-shifting external and internal factors while ensuring robustness against process variabilities and unforeseen events. This has a pronounced impact on production control, which serves as the operational intersection between production planning and the shop- floor resources, and necessitates the capability to manage intricate process interdependencies effectively. Considering the increasing dynamics and product diversification, alongside the need to maintain constant production performances, the implementation of innovative control strategies becomes crucial.
In recent years, the integration of Industry 4.0 technologies and machine learning methods has gained prominence in addressing emerging challenges in production applications. Within this context, this cumulative thesis analyzes deep learning based production systems based on five publications. Particular attention is paid to the applications of deep reinforcement learning, aiming to explore its potential in dynamic control contexts. Analysis reveal that deep reinforcement learning excels in various applications, especially in dynamic production control tasks. Its efficacy can be attributed to its interactive learning and real-time operational model. However, despite its evident utility, there are notable structural, organizational, and algorithmic gaps in the prevailing research. A predominant portion of deep reinforcement learning based approaches is limited to specific job shop scenarios and often overlooks the potential synergies in combined resources. Furthermore, it highlights the rare implementation of multi-agent systems and semi-heterarchical systems in practical settings. A notable gap remains in the integration of deep reinforcement learning into a hyper-heuristic.
To bridge these research gaps, this thesis introduces a deep reinforcement learning based hyper- heuristic for the control of modular production systems, developed in accordance with the design science research methodology. Implemented within a semi-heterarchical multi-agent framework, this approach achieves a threefold reduction in control and optimisation complexity while ensuring high scalability, adaptability, and robustness of the system. In comparative benchmarks, this control methodology outperforms rule-based heuristics, reducing throughput times and tardiness, and effectively incorporates customer and order-centric metrics. The control artifact facilitates a rapid scenario generation, motivating for further research efforts and bridging the gap to real-world applications. The overarching goal is to foster a synergy between theoretical insights and practical solutions, thereby enriching scientific discourse and addressing current industrial challenges.
Das Rechtslexikon
(2024)
Kompetenz im handlichen Format in über 1.400 Stichwörtern, 26 Tabellen und Schaubildern zu allen wichtigen Rechtsgebieten: Zivilrecht (z. B. Familien- und Erbrecht, Versicherungsrecht), Arbeitsrecht, Öffentliches Recht (z. B. Baurecht, Staats- und Verfassungsrecht, Umweltrecht, Verwaltungsrecht), Sozialrecht (z. B. Arbeitslosen- und Rentenversicherung), Strafrecht (einschließlich Jugendstrafrecht und Ordnungswidrigkeiten) sowie ihren europa- und völkerrechtlichen Bezügen.
Das Rechtslexikon ist in seiner 2. Auflage ergänzt worden um zahlreiche neue und aktuelle Begriffe wie Impfpflicht, Quarantäne, Radwegbenutzung, Schutzpflicht, Crowdworking, Homeoffice/mobiles Arbeiten, Datenschutzgrundverordnung, Mediation, Smart Contract u.v.a.m. Das Lexikon erklärt außerdem Normen und Grundsätze des deutschen und europäischen Rechts, knapp, zuverlässig und verständlich. Grundlegende Fragen und Zusammenhänge werden in besonderen Überblicksartikeln erläutert. Querverweise machen auf verwandte Themen im Lexikon aufmerksam.
Ein Lexikon für juristisch interessierte Laien, Studierende sowie Schülerinnen und Schüler.
In the debate on epistemic injustice, it is generally assumed that testimonial injustice as one form of epistemic injustice cannot be committed (fully) deliberately or intentionally because it involves unconscious identity prejudices. Drawing on the case of sexual violence against refugees in European refugee camps, this paper argues that there is a form of testimonial injustice—willful testimonial injustice—that is deliberate. To do so, the paper argues (a) that the hearer intentionally utilizes negative identity prejudices for a particular purpose and (b) that the hearer is aware of the fact that the intentionally used prejudices are in fact prejudices. Furthermore, the paper shows how testimonial injustice relates to recognition failures both in terms of a causal as well as a constitutive claim. In fact, introducing willful testimonial injustice can support the constitutive claim of such a relation that has so far received little attention. Besides arguing for a novel form of testimonial injustice and contributing to the recent debate on the relation between epistemic injustice and recognition failures, this paper is also motivated by the attempt to draw attention to the inhumane conditions for refugees at the border of Europe as well as elsewhere.
Der vorliegende Beitrag, der sich weniger als Fachbeitrag, sondern vielmehr als Erfahrungsbericht aus der Praxis versteht, berichtet von unterschiedlichen Versuchen, die Mensch-Tier-Beziehung in den schulischen Kontext einzubringen und somit der unzureichenden Beachtung der Thematik entgegenzuwirken. Nachdem überblicksartig die Relevanz der Mensch-Tier-Thematik herausgestellt und auf diese Weise die Notwendigkeit einer unterrichtlichen Beschäftigung mit dem Verhältnis von Menschen und anderen Tieren begründet wird, wird zunächst von einem ersten Versuch berichtet, (angehende) Lehrkräfte im Rahmen eines Workshops am Studienseminar Potsdam für die Relevanz der Mensch-Tier-Thematik zu sensibilisieren sowie über eine mögliche Umsetzung in den verschiedenen Unterrichtsfächern zu informieren. Anschließend werden – exemplarisch für den Politikunterricht – zwei Unterrichtsstunden, die die Mensch-Tier-Beziehung auf verschiedene Weise in den Politikunterricht einbeziehen, sowie die im Rahmen der Durchführung gesammelten Erfahrungen vorgestellt.
Wem wird geglaubt und wem nicht? Wessen Wissen wird weitergegeben und wessen nicht? Wer hat eine Stimme und wer nicht? Theorien der epistemischen Ungerechtigkeit befassen sich mit dem breiten Feld der ungerechten oder unfairen Behandlung, die mit Fragen des Wissens, Verstehens und Kommunizierens zusammenhängen, wie z.B. die Möglichkeit, vom Wissen oder von kommunikativen Praktiken ausgeschlossen zu werden oder zum Schweigen gebracht zu werden, aber auch Kontexte, in denen die Bedeutungen mancher systematisch verzerrt oder falsch gehört und falsch dargestellt werden, in denen manchen misstraut wird oder es an epistemischer Handlungsfähigkeit mangelt. In diesem Buch wird eine Übersicht über die breite Debatte epistemischer Ungerechtigkeit, epistemischer Unterdrückung und epistemischer Gewalt gegeben, in dem unterschiedliche Theorien, die sich auf der Schnittstelle von Gerechtigkeitstheorie und epistemischen Fragen befinden, systematisch und kritisch diskutiert sowie theoretische Vorgänger dieser Theorien beleuchtet werden.