Refine
Year of publication
- 2006 (1470) (remove)
Document Type
- Article (930)
- Doctoral Thesis (206)
- Monograph/Edited Volume (200)
- Review (56)
- Other (26)
- Part of Periodical (11)
- Working Paper (9)
- Conference Proceeding (8)
- Postprint (8)
- Master's Thesis (6)
Language
Is part of the Bibliography
- yes (1470) (remove)
Keywords
- Netzwerke des Wissens (4)
- Poetik (4)
- Weltbegriff (4)
- Weltbewusstsein (4)
- polyelectrolyte (4)
- Insekten (3)
- Nichtlineare Dynamik (3)
- Serotonin (3)
- metabolite profiling (3)
- metabolomics (3)
- microemulsion (3)
- nonlinear dynamics (3)
- 16. Jahrhundert (2)
- 1845-1862 (2)
- Ackerschmalwand (2)
- Adhäsion (2)
- Amerikanische Schabe (2)
- Andreas Gryphius (2)
- Angewandte Sozialpsychologie (2)
- Arabidopsis thaliana (2)
- Argumentationstheorie (2)
- Aristoteles-Kommentare (2)
- Aufmerksamkeit (2)
- Chlamydomonas (2)
- DNA (2)
- Dead Sea Transform (2)
- Deutsche Literatur der Frühen Neuzeit (2)
- Dopamin (2)
- Drama (2)
- EEG (2)
- Enthusiasmus (2)
- Erwerbsalter (2)
- Frühe Neuzeit (2)
- Gesundheitsförderung (2)
- Gleichnis (2)
- Inspiration (2)
- Jacopo Zabarella (2)
- Klimatologie (2)
- Kognition (2)
- Kosmos (2)
- Lehrerbildung (2)
- Maschinelles Lernen (2)
- Menschenrecht (2)
- Monsun (2)
- Nanopartikel (2)
- Netzzeitalter (2)
- Neuplatonismus (2)
- Phylogenie (2)
- Polyelektrolyt (2)
- Psychosoziale Gesundheit (2)
- Sachsen (2)
- Speichel (2)
- Speicheldrüse (2)
- Stickstoff (2)
- TransArea Studies (2)
- Unsicherheit (2)
- Unsicherheitsanalyse (2)
- Vereinte Nationen (2)
- Völkerrecht (2)
- Wissenschaftstheorie (2)
- Zeitreihenanalyse (2)
- adhesion (2)
- aristotelische Logik (2)
- attention (2)
- bifurcation analysis (2)
- biogenic amine (2)
- biogenic amines (2)
- cave fish (2)
- climate change (2)
- cognition (2)
- competition (2)
- cyclic AMP (2)
- dopamine (2)
- fruit (2)
- honeybee (2)
- peptide (2)
- protein (2)
- protein translocation (2)
- salivary gland (2)
- singlet oxygen (2)
- uncertainty analysis (2)
- working memory (2)
- "Spacer"-Gruppe (1)
- (glycogen) starch phosphorylase (1)
- 1,3,4-oxadiazole (1)
- 1790 (1)
- 1792 (1)
- 1799-1804 (1)
- 1800 (1)
- 1829 (1)
- 1870 (1)
- 3D-Stadtmodelle (1)
- 3d city models (1)
- A. F. de Fourcroy (1)
- ATRP (1)
- Abgaben (1)
- Abgabenbescheide (1)
- Abraham Gottlob Werner (1)
- Acetylcholin (1)
- Adverbial Quantification (1)
- Adverbs of Frequency (1)
- Adverbs of Quantity (1)
- Afrika (1)
- Agglomeration (1)
- Aggregate (1)
- Aggression (1)
- Agricultural Administration (1)
- Aktualisierung (1)
- Alignment (1)
- Allgemeine atmosphärische Zirkulation (1)
- Amery Oasis (1)
- Amery-Oase (1)
- Aminosäuren (1)
- Anisotropie (1)
- Annelida (1)
- Antarktis (1)
- Anthropogene Klimaänderung (1)
- Anti-HIV (1)
- Antike (1)
- Antikörper (1)
- Antikörperproduktion (1)
- Applied Psychology (1)
- Aral Sea (1)
- Aralsee (1)
- Arbeit (1)
- Arbeitsgedächtnis (1)
- Arbeitsgestaltung (1)
- Arbeitsmotivation (1)
- Argininbiosynthese (1)
- Arsen (1)
- Arsenic (1)
- Astrometrie (1)
- Asymptotische Entwicklung (1)
- AtDGK gene (1)
- AtDGK genes (1)
- Aufzählung (1)
- Auslandseinsatz (1)
- Autograph (1)
- Außenpolitik (1)
- Aversionsgefühle (1)
- BCI (1)
- Balance (1)
- Bayes (1)
- Beanspruchung (1)
- Begrüßung (1)
- Behaviour (1)
- Behinderte (1)
- Beiträge (1)
- Bewegung (1)
- Bewegungsanalyse (1)
- Bewegungssteuerung (1)
- Bibliographie (1)
- Bibliotheksbestand (1)
- Biene (1)
- Bifurkationsanalyse (1)
- Bildbenennen (1)
- Bildende Kunst (1)
- Bioaktivierung (1)
- Biocomputing (1)
- Bioenergie (1)
- Biogene Amine (1)
- Bioinformatik (1)
- Biomineralisation (1)
- Biotransformation (1)
- Blockcopolymer (1)
- Brain Computer Interface (1)
- Brandstiftungsdelikte (1)
- Brandstrafrecht (1)
- Bundeswehr (1)
- Burn-out-Syndrom (1)
- CD95 (1)
- CDA (1)
- CEE (1)
- CO₂ (1)
- CYP3A4 (1)
- Calcium-Imaging (1)
- Calciumcarbonat (1)
- Campylomormyrus (1)
- Canonical Gibbs measure (1)
- Carbon (1)
- Cassini (1)
- Cassini<Raumsonde> (1)
- Celtic mutations (1)
- Central Asia (1)
- Central and Eastern Europe (1)
- Charge-Storage (1)
- Chemieunterricht (1)
- Chicken Repeat (1)
- Chitin (1)
- Chitinasen (1)
- Classification (1)
- Climate change scenarios (1)
- Climatology (1)
- Code (1)
- Codierung (1)
- Codon Usage (1)
- Common Spatial Pattern (1)
- Complex (1)
- Computergrafik (1)
- Computersicherheit (1)
- Continuous Wavelet Spectral Analysis (1)
- Curcumin (1)
- Cyp3a11 (1)
- DISC (1)
- DMSO (1)
- DNA computing (1)
- DNA-Lipid-Wechselwirkung (1)
- DNA-lipid-interaction (1)
- DNS (1)
- DSA (1)
- Deimos (1)
- Demokratie (1)
- Deregulierung (1)
- Detektor (1)
- Detektor-Entwicklung (1)
- Deutschland (1)
- Deutschland / Bundeswehr (1)
- Dezentralisation (1)
- Diacylglycerol (1)
- Diacylglycerol-Kinasen (1)
- Didaktik der Mathematik (1)
- Differenzenoperator (1)
- Diffusionsbarriere (1)
- Dinoflagellatenzyste (1)
- Diskriminierung (1)
- Diskurs (1)
- Distanzierung (1)
- Doppik (1)
- Duration (1)
- Dynamische Modellierung (1)
- Dynamische Rekonfiguration (1)
- E-Learning (1)
- E-ring (1)
- EG-Wasserrahmenrichtlinie (1)
- EPR (1)
- East Antarctica (1)
- Ecosystem modelling (1)
- Effizienz (1)
- Einmaleins (1)
- El Niño (1)
- El Niño Phänomen (1)
- El-Niño-Phänomen (1)
- Elektrische Entladung (1)
- Elektrische Fische (1)
- Emil Naumann (1)
- Emotionale Erschöpfung (1)
- Empirische Forschung (1)
- Ensemble-Simulation (1)
- Entscheidung bei Unsicherheit (1)
- Erdbeben (1)
- Ereigniskorreliertes Potenzial (1)
- Ernährung (1)
- Estland (1)
- Estonia (1)
- European Integration (1)
- Europeanisation (1)
- Europäische Integration (1)
- Europäisierung (1)
- Evaluation (1)
- Extrasolare Planeten (1)
- Extrazelluläre Matrix (1)
- FRET (1)
- Farbe (1)
- Feature Combination (1)
- Feedback (1)
- Fehlbeanspruchungen (1)
- Fehlende Daten (1)
- Finanzen (1)
- Finsler-Abstand (1)
- Finsler-distance (1)
- Florigen (1)
- Flussaufteilung (1)
- Flusseinzugsgebietsmanagement (1)
- Flüssigkristall (1)
- Forschungsbibliothek (1)
- Freiraumanalyse (1)
- Freistehende Membranen (1)
- Frucht (1)
- Förderdiagnostik (1)
- G protein-coupled receptors (1)
- G-Protein-gekoppelte-Rezeptoren (1)
- G. W. Leibniz (1)
- GC-MS (1)
- GI-GPx (1)
- GPCR (1)
- GWD (1)
- Gebühren (1)
- Gehirn-Computer-Schnittstelle (1)
- Geld (1)
- Generalized translation operator (1)
- Genfamilie (1)
- Genregulation (1)
- Gentransfer (1)
- Geochemie (1)
- Geognosie (1)
- Geoinformationswesen (1)
- Geometrieunterricht (1)
- Geovisualisierung (1)
- Geschichte (1)
- Geschichtsunterricht in der gymnasialen Oberstufe (1)
- Gesundheit (1)
- Gesundheitsressourcen (1)
- Gewässergüte (1)
- Gleichgewicht (1)
- Grain-size distributions (1)
- Grenzüberschreitende Kooperation (1)
- Größen (1)
- Göttingen (1)
- HOMA (1)
- HTP (1)
- Habitat preferences (1)
- Habitatmodellierung (1)
- Habitatpräferenz (1)
- Handlungsorientierung (1)
- Hauptkomponentenanalyse (1)
- Hauptspannungsachse (1)
- Haushaltsrecht (1)
- Havel (1)
- Heuristik (1)
- Himmelblau (1)
- Historische Bildungsforschung (1)
- Historisches Denken (1)
- History of education (1)
- Human service work (1)
- Humboldts Leibnizbild (1)
- Hybridomtechnik (1)
- Hydrotrope (1)
- I. A. Schmakow (1)
- IP3 (1)
- IP3-Rezeptor (1)
- IP3-receptor (1)
- IRAK (1)
- IT security (1)
- Identitätsentwicklung (1)
- India (1)
- Indian Monsoon (1)
- Indischer Monsun (1)
- Information Transfer Rate (1)
- Integrated Ocean Drilling Program (1)
- Intelligenz (1)
- Interaktion (1)
- Interleukin-1 (1)
- International Continental Scientific Drilling Program (1)
- Interpolation (1)
- Interstellare Materie (1)
- Introgression (1)
- Ionic Self-Assembly (1)
- Jahn-Teller distortion (1)
- Juan José de Oteyza (1)
- Jugend (1)
- KAG (1)
- Kardiovaskuläre Krankheit (1)
- Kernrezeptor (1)
- Kind (1)
- Kindertagesstätten (1)
- Kinetik (1)
- Klimaprognose (1)
- Klimasensitivität (1)
- Klimaszenarien (1)
- Klimaveränderung (1)
- Knotenpunkte (1)
- Kohlenstoff (1)
- Kohärenz-Analyse (1)
- Kollisionsdynamik (1)
- Kolonkrebs (1)
- Komplex (1)
- Kongress (1)
- Konjugierte Polymere (1)
- Konsistenzeffekt (1)
- Kontinuumsgrenzwert (1)
- Kontrollierte klinische Studie (1)
- Kontrolltheorie (1)
- Kopplungs-Analyse (1)
- Korngrößenverteilungen (1)
- Kraftsensoren (1)
- Kunst (1)
- Kunsterziehung (1)
- Kunstunterricht (1)
- Kybernetik (1)
- LBA problem (1)
- Landesbetrieb (1)
- Landnutzungsänderung (1)
- Landschaftsfragmentierung (1)
- Landschaftszerschneidung (1)
- Landwirtschaftsverwaltung (1)
- Lanthanide (1)
- Lanthanides (1)
- Laser (1)
- Last Glacial Maximum (1)
- Late Quaternary (1)
- Lateinamerika (1)
- Lebensstil (1)
- Lehrerausbildung (1)
- Lehrerbibliothek (1)
- Lehrerfortbildung (1)
- Leidenschaft (1)
- Leistungsdruck (1)
- Lentibulariaceae (1)
- Lernforschung (1)
- Lernkultur (1)
- Lernprozesse (1)
- Lernstörung (1)
- Lerntherapie (1)
- Lernvoraussetzungen (1)
- Lesotho (1)
- Letztes Glaziales Maximum (1)
- Li-F granite (1)
- Liberalisierung (1)
- Library stock (1)
- Limnologie (1)
- Lindenmayer systems (1)
- Lion Feuchtwanger (1)
- Lipide / Doppelschicht (1)
- Liquid crystal (1)
- MOCS2 (1)
- MOE (1)
- MSDA (1)
- Machine Learning (1)
- Makroinitiator (1)
- Maldanidae (1)
- Margot Faak (1)
- Marguerite Duras (1)
- Markov process (1)
- Markov-Prozess (1)
- Mars (1)
- Mathematische Physik (1)
- Media Psychology (1)
- Media Violence (1)
- Mediengewalt (1)
- Medienpsychologie (1)
- Mediterranean Diet (1)
- Mediterranes Tiefdrucksystem (1)
- Mehrstoffsystem (1)
- Menschenrechte (1)
- Menschenrechtsverletzungen (1)
- Merkmalsauflistung (1)
- Merkmalsverifikation (1)
- Mesoskalentransformation (1)
- Metabolit (1)
- Metabolite (1)
- Metabolome (1)
- Microlensing (1)
- Microsatellite (1)
- Middleware (1)
- Mikroemulsion (1)
- Mikrogravitationslinseneffekt (1)
- Mikrosatelliten (1)
- Mikrosimulation (1)
- Mineralogie (1)
- Mittel- und Osteuropa (1)
- Mittelschule (1)
- Mizellbildung (1)
- Modellkopplung (1)
- Modellsensitivität (1)
- Modenkopplung (1)
- Molekulardynamik (1)
- Momententensor (1)
- Monoschicht (1)
- Moran effect (1)
- Moran-Effekt (1)
- Morphologie <Biologie> (1)
- Multi-Class (1)
- Multiplikation (1)
- Multivariate Statistics (1)
- Multivariate Statistik (1)
- Mutagenität (1)
- N-Acetyl-chitooligosaccharide (1)
- N-acetyl-chitooligosaccharides (1)
- NAO (1)
- NF-X1 (1)
- NF-kappaB (1)
- NPM (1)
- NSM (1)
- Nachfragesysteme (1)
- Netzindustrien (1)
- Neue Medien (1)
- Neujahrsempfang (1)
- Neuronales Netz (1)
- Neurotransmitter-Rezeptor (1)
- New Public Management (1)
- Nicotin (1)
- Niederschlesien (1)
- Nilhechte <Familie> (1)
- Nitrat (1)
- Nitrogen (1)
- Nomen (1)
- Nonlinear Dynamics (1)
- Nordböhmisches Gebiet (1)
- Nrf2 (1)
- Numerical cognition (1)
- Numerisches Verfahren (1)
- OLED (1)
- ORMOCER (R) (1)
- Octopamin (1)
- Oligomere (1)
- Olivenöl (1)
- Ontogenie (1)
- Operatortheorie (1)
- Ostantarktis (1)
- Oxidativer Stress (1)
- Ozon (1)
- P-31 NMR (1)
- PKA (1)
- PWD (1)
- PXR (1)
- Pade approximants (1)
- Palaeoclimatology (1)
- Paleolimnology (1)
- Paläoklimatologie (1)
- Paläolimnologie (1)
- Papier (1)
- Partizipation (1)
- Passeriformes (1)
- Peptid (1)
- Perlmutt (1)
- Personenbezogene Dienstleistungstätigkeiten (1)
- Pflegeberuf (1)
- Phase-Analysis (1)
- Phasen-Analyse (1)
- Phenole (1)
- Phosphatidsäure (1)
- Phospholipide (1)
- Pitch (1)
- Planetare Ringe (1)
- Poecilia mexicana (1)
- Poeciliidae (1)
- Poland (1)
- Polar ozone (1)
- Polar vortex (1)
- Polarwirbel (1)
- Polen (1)
- Politische Sozialisation (1)
- Pollenanalyse (1)
- Polychaeta (1)
- Polyelektrolyte (1)
- Polymer (1)
- Polymermembranen (1)
- Polyoxazolin (1)
- Polypeptid (1)
- Polyphenole (1)
- Potsdam / Potsdam-Institut für Klimafolgenforschung (1)
- Preußen (1)
- Privatisierung (1)
- Prognose (1)
- Präkursor (1)
- Pseudodifferentialoperatoren auf dem Torus (1)
- Psychische Belastung (1)
- Psychische Gesundheit (1)
- Pulszugformung (1)
- Qualitätssicherung (1)
- Quantenpunkte (1)
- Quantum Dots (1)
- Quaternary (1)
- RAFT (1)
- Radiation transfer model (1)
- Raman (1)
- Rationierung (1)
- Realistic Mathematics Education (1)
- Rechnen (1)
- Rechtsgeschichte 19. Jh. (1)
- Rechtspsychologie (1)
- Rede (1)
- Redoxregulation (1)
- Reformen (1)
- Regulierung (1)
- Reisetagebuch (1)
- Relation historique (1)
- Research library (1)
- Residual circulation (1)
- Retrosynthese (1)
- Retrotransposon (1)
- Roche (1)
- Roche Limit (1)
- Ryukyu Group (1)
- Ryukyu Islands (1)
- S receiver functions (1)
- SAXS (1)
- SLS (1)
- SNARC Effekt (1)
- SNARC effect (1)
- SOD (1)
- SRP (1)
- Saccharose Synthase (1)
- Salzburg (1)
- Sambagawa (1)
- Saturn (1)
- Saturn<Planet> (1)
- Scale dependency (1)
- Schule (1)
- Schulgeschichte (1)
- Schwarmbeben (1)
- Schwefel (1)
- Schülerkompetenzen (1)
- Screening (1)
- Sedimentologie (1)
- Seestandsänderung (1)
- Seismologie (1)
- Sekundarstufe I (1)
- Selbstorganisation (1)
- Semi-klasische Abschätzung (1)
- Sensomotorik (1)
- Sesia Zone (1)
- Sibirienhoch (1)
- Signal Processing (1)
- Signalkakaden (1)
- Signalkaskaden (1)
- Signaltransduktionsprozesse (1)
- Significance Testing (1)
- Signifikanztests (1)
- Single Trial Analysis (1)
- Situations (1)
- Skalenabhängigkeit (1)
- Social Psychology (1)
- Solanaceae (1)
- Solanum lycopersicum (1)
- Solanum tuberosum (1)
- Somatik (1)
- Sonderpädagogische Diagnostik (1)
- Soziale Unterstützung (1)
- Soziale Wahrnehmung (1)
- Sozialpolitik (1)
- Sozialpsychologie (1)
- Spatio-Spectral Filter (1)
- Species distribution modelling (1)
- Spectroscopy (1)
- Spektralanalyse <Stochastik> (1)
- Spektraltheorie (1)
- Spektroskopie (1)
- Spitzbergen (1)
- Spätquartär (1)
- Staatskunst (1)
- Staatsrecht (1)
- Stenella attenuata (1)
- Sternentstehung (1)
- Sternhaufen (1)
- Steuern (1)
- Steven Jan van Geuns (1)
- Stimulierte Brillouin Streuung (1)
- Stochastic Differential Equation (1)
- Stochastische Prozesse (1)
- Stoffwechsel (1)
- Stormer-Verlet method (1)
- Strahlungstransportmodell (1)
- Strukturreform (1)
- Studie (1)
- Stärkeabbau (1)
- Suche (1)
- Sulforaphan (1)
- Sulfotransferasen (1)
- Synchronisation (1)
- Synchronisierung (1)
- Systematische Musikpädagogik (1)
- Tabak (1)
- Teacher library (1)
- Teacher training (1)
- Temporäre Anbindung (1)
- Tense Semantics (1)
- Tenside (1)
- Texturen (1)
- Th-U-Pb monazite age (1)
- Theoretical ecology (1)
- Theoretische Ökologie (1)
- Thioglycoside (1)
- Thiolmodifikation (1)
- Time Series Analysis (1)
- Time-resolved Immunoassay (1)
- Tomate (1)
- Tomato (1)
- Trajectory model (1)
- Trajektorienmodell (1)
- Transmigration (1)
- Transnationale Migration (1)
- Trypanosoma cruzi (1)
- Tunneleffekt (1)
- Turbulenz (1)
- Turbulenz Korrelations-Messung (1)
- Turdus sp. (1)
- Tyramin (1)
- UV/VIS (1)
- Uganda (1)
- Ultrazentrifuge (1)
- Unabhängige Komponentenanalyse (1)
- Ungleichgewicht (1)
- Unsicherheiten (1)
- Urteilsfindung (1)
- Utricularia (1)
- VM (1)
- Vegetation (1)
- Verb (1)
- Vertrauen (1)
- Verwaltung (1)
- Verwaltungsmodernisierung (1)
- Verwaltungsorganisation (1)
- Vietnam (1)
- Vitamin E (1)
- Vogtland (1)
- Vulkan (1)
- Wavelet Coherence (1)
- Wavelet-Analyse (1)
- Web Services (1)
- Weibliche Jugend (1)
- Wellenausbreitung (1)
- West Bohemia (1)
- Western Ghats (1)
- Wettbewerbspolitik (1)
- Widerstandsrecht (1)
- Winddynamik (1)
- X-ray mapping (1)
- X-rays : stars (1)
- Xiphophorus (1)
- ZENK (1)
- Zaremba problem (1)
- Zeitaufgelöster Immunoassay (1)
- Zentralasien (1)
- Züchtung (1)
- accepting grammars (1)
- accessory minerals (1)
- accounting (1)
- activity patterns (1)
- actylcholine (1)
- acupuncture (1)
- adiponectin (1)
- administration (1)
- adulthood (1)
- aflatoxin B-1 (1)
- age of acquisition (1)
- age-of-acquisition (1)
- agent interaction (1)
- agent-based model (1)
- aggregate (1)
- aggregation (1)
- amino acid score (1)
- amino acids (1)
- amorph (1)
- amylase activity (1)
- amylopectin (1)
- anatomical connectivity (1)
- anhydrite inclusions (1)
- anisotropy (1)
- anthracenes (1)
- antibody synthesis (1)
- antioxidant (1)
- antioxidative capacity (1)
- applied social psychology (1)
- arabinoxylan (1)
- arginine biosynthesis (1)
- arthropathies (1)
- artificial virus (1)
- aspect-oriented programming (1)
- assembly (1)
- asthenosphere (1)
- astrometry (1)
- attribute knowledge (1)
- auxiliary control (1)
- auxin (1)
- aversion to clients (1)
- balance (1)
- bayesian inference (1)
- beryllium (1)
- beta-Amylase (1)
- beta-amylase (1)
- bicontinuous phase (1)
- bilayer (1)
- bio-computing (1)
- bioactivation (1)
- biogene Amine (1)
- biological age (1)
- biological robustness (1)
- biomineralization (1)
- biosensor (1)
- block copolymers (1)
- blowfly (1)
- boundary value problems (1)
- brain-computer interface (1)
- brassinosteroid (1)
- breeding (1)
- bushbuck (1)
- c-FLIP (1)
- cAMP (1)
- calcium carbonate (1)
- calculation (1)
- capacity (1)
- cardiomyopathy (1)
- carnivory (1)
- cellular signalling (1)
- chaetae (1)
- chaetal arrangement (1)
- charge profiling (1)
- charge storage (1)
- charge trap (1)
- charge-dipole interaction (1)
- chemical oxidative polymerization (1)
- chemistry education (1)
- chemoautotrophy (1)
- chicken repeat 1 (1)
- child (1)
- chimpanzee (1)
- chitin (1)
- chitinase (1)
- chlorite (1)
- cholesterol (1)
- cis (1)
- climate projection (1)
- climate sensitivity (1)
- climatic change (1)
- cobalt porphyrin (1)
- cockroach (1)
- code (1)
- codon usage (1)
- collision dynamics (1)
- colloids (1)
- coloration of terms (1)
- colorectal cancer (1)
- colored solid varieties (1)
- colour (1)
- common spatial patterns (1)
- comparative head morphology (1)
- competitiveness (1)
- complementation (1)
- complex systems (1)
- compositional map (1)
- computational biochemistry (1)
- computer graphics (1)
- condition factor (1)
- conditionals (1)
- conjugated polymers (1)
- conjugates (1)
- consistency effect (1)
- constitutive activity (1)
- contractor/provider split (1)
- contrast (1)
- control (1)
- copper (1)
- coral (1)
- corner Sobolev spaces with double weights (1)
- corporate governance (1)
- correction (1)
- cortical network (1)
- crops (1)
- crystal structure (1)
- curcumin (1)
- cyclic-olefin copolymer (1)
- cytochrome c (1)
- decentralisation (1)
- decision tree (1)
- declarative memory (1)
- degree of non-regulation (1)
- dehydration (1)
- deklaratives Gedächtnis (1)
- delayed feedback (1)
- demand systems (1)
- detailed balance equation (1)
- detector development (1)
- diacylglycerol (1)
- diet (1)
- dietary fibre (1)
- difference operator (1)
- differential equation (1)
- diffusion barrier (1)
- disengagement (1)
- disequilibrium (1)
- divalent cations (1)
- drug discovery (1)
- dust (1)
- dynamic AOP (1)
- dynamic reconfiguration (1)
- dynamic service adaptation (1)
- dynamical cluster (1)
- earthquake swarm (1)
- eco-hydrology (1)
- econometric modelling (1)
- economic usage in admistration (1)
- eddy covariance (1)
- effektive Maschenweite (1)
- efficiency (1)
- ejecta (1)
- electrochemistry (1)
- electron microprobe (1)
- electron transfer (1)
- emotional exhaustion (1)
- empirical research (1)
- empirisch (1)
- ensemble simulation (1)
- ensuring state (1)
- enumeration (1)
- epithelial transport (1)
- epithelialer Transport (1)
- event-related desynchronization (1)
- event-related potentials (1)
- extrasolar planets (1)
- extremophile teleosts (1)
- fMRI (1)
- fMRT (1)
- feature listing (1)
- feature verification task (1)
- female youth (1)
- financial constraints (1)
- fine arts (1)
- finite state sequential transducers (1)
- flavonoid glycosides (1)
- flow system (1)
- fluid inclusions (1)
- flux partitioning (1)
- force methods (1)
- force sensors (1)
- forest model (1)
- französ. Zivilrecht (1)
- französische Literatur 20. Jh. (1)
- functional connectivity (1)
- gap-filling (1)
- gemini surfactant (1)
- gene family (1)
- genetic algorithm (1)
- geodetic survey and spatial data (1)
- geometry (1)
- geovisualization (1)
- gesture (1)
- gold electrodes (1)
- gold nanoparticles (1)
- governance (1)
- grammaticalization (1)
- granite melts (1)
- green tea phenols (1)
- groundwater dynamics (1)
- growth-age (1)
- haemophilia (1)
- hard core potential (1)
- health (1)
- health promotion (1)
- health resources (1)
- heart failure (1)
- heterocyclic aromatic amines (1)
- heterozyklische aromatische Amine (1)
- heuristics (1)
- high-frequency force (1)
- high-pressure metamorphism (1)
- history of school (1)
- hormone (1)
- horseradish peroxidase (1)
- human follicular fluid (1)
- hybridoma cells (1)
- hydrogen bonds (1)
- hydrogen peroxide (1)
- hydrogenation (1)
- hydrotropes (1)
- hyperequational theory (1)
- hypoxia (1)
- ill-posed problem (1)
- immaterielle Schäden (1)
- immobilization (1)
- impaired glucose tolerance (1)
- incorporation (1)
- incremental SVM (1)
- indianische Kunst (1)
- indirect dependency (1)
- individual-based model (1)
- infants (1)
- insects (1)
- insulin (1)
- insulin resistance (1)
- integrated modelling (1)
- integrated river basin management (1)
- integrated river basin modelling (1)
- interference (1)
- interleukin-1 (1)
- intermittency (1)
- interstellar medium (1)
- intestinal epithelial cells (1)
- intestinale Epithelzellen (1)
- intrusion detection (1)
- inverse micelles (1)
- inverse modelling (1)
- inverse opals (1)
- ionischer Self-Assembly (1)
- isomerization (1)
- iterative regularization (1)
- kategoriespezifische Benennstörungen (1)
- kinetic (1)
- kinetics (1)
- kommunal (1)
- künstlicher Virus (1)
- lake-level change (1)
- land use change (1)
- landscape analysis (1)
- landscape dissection (1)
- landscape fragmentation (1)
- landscape modelling (1)
- late holocene (1)
- layer-by-layer (1)
- learning processes (1)
- leftmost derivations (1)
- legal decision making (1)
- leptin (1)
- limestone (1)
- linear expenditure system (1)
- lineares Ausgabensystem (1)
- linearly implicit time stepping methods (1)
- lipid monolayer (1)
- liquid chromatography-mass spectrometry (1)
- lithography (1)
- lithosphere (1)
- logging (1)
- long distance wh-movement (1)
- long-term data (1)
- low-frequency force (1)
- lysozyme (1)
- lysozyme activity (1)
- macrosurfactants (1)
- magma evolution (1)
- malignant transformation (1)
- maligne Transformation (1)
- manifolds with conical singularities (1)
- marketization (1)
- mass flowering (1)
- mathematical model (1)
- mean residence time (1)
- mediterrane Ernährung (1)
- melt inclusions (1)
- melt-melt immiscibility (1)
- mental number line (1)
- mentaler Zahlenstrahl (1)
- mesoscale transormation (1)
- mesostructure (1)
- metabiography (1)
- metabolic genomics (1)
- metabolic regulation (1)
- metabolite breeding (1)
- metabolome (1)
- metalinguistic (1)
- metathesis (1)
- mica (1)
- micelles (1)
- micellization (1)
- microsimulation (1)
- middle school (1)
- minerals (1)
- miscibility (1)
- mobile Raman-microprobe (1)
- modality (1)
- mode-locking (1)
- model coupling (1)
- model description (1)
- model uncertainty (1)
- molecular conformation (1)
- molecular dynamics (1)
- molecular networks (1)
- molekulare Netzwerke (1)
- molybdenum cofactor deficiency (1)
- moment tensor (1)
- motor control (1)
- movement analysis (1)
- multi-hypersubstitutions (1)
- multicomponent system (1)
- multinomial models (1)
- multiplication (1)
- musikpädagogische Forschung (1)
- mutagenicity (1)
- mutants (1)
- nacre (1)
- nanoparticle (1)
- nanoparticles (1)
- natriuretic peptide system (1)
- negation (1)
- neogrammarians (1)
- network based industries (1)
- neu gelesen (1)
- neurohormone (1)
- neuropeptide (1)
- nichtlineare PCA (NLPCA) (1)
- nicotine (1)
- nitrate (1)
- nitrogen (1)
- nodalpoints (1)
- noise (1)
- non-linear mixed effects (1)
- non-manuals (1)
- nonlinear PCA (NLPCA) (1)
- noun (1)
- numerical simulations (1)
- numerical weather prediction (1)
- numerische Kognition (1)
- nutrient retention (1)
- octopamine (1)
- oligomers (1)
- ongonite (1)
- online learning (1)
- ontogenesis (1)
- optimality theory (1)
- orangutan (1)
- ordering process (1)
- organisation of administration (1)
- overlapping reading frames (1)
- oxides (1)
- pain (1)
- pantropical spotted dolphin (1)
- paper (1)
- parallel updating (1)
- parallele Aktualisierung (1)
- parametrices (1)
- partial algebras (1)
- participation (1)
- particle morphology (1)
- pattern description (1)
- pattern-process interrelationship (1)
- peralkalinity (1)
- peraluminosity (1)
- period doubling (1)
- phase diffusion (1)
- phosphatidic acid (1)
- photo-stimulated discharge (1)
- photochromism (1)
- photonic crystal (1)
- phylogenesis (1)
- phylogeny (1)
- physikalisch-chemisch (1)
- picture naming (1)
- planetary rings (1)
- plant phenolic compounds (1)
- plant secondary metabolites (1)
- political identity (1)
- political socialisation (1)
- politische Philosophie (1)
- pollination (1)
- polycystic ovary syndrome (1)
- polyelectrolyte brushes (1)
- polyelectrolyte membranes (1)
- polyethylene terephthalate (1)
- polymer membranes (1)
- polymer-electret (1)
- polyoxazoline (1)
- polypeptide (1)
- polypyrrole (1)
- post-collisional setting (1)
- potential chitinase inhibitors (1)
- potentielle Chitinaseinhibitoren (1)
- prediction (1)
- pressure (1)
- presupposition (1)
- preußisches Schulwesen (1)
- primary metabolism (1)
- proactive interference (1)
- proaktive Interferenz (1)
- programmed grammars (1)
- proinsulin (1)
- prosodic focus (1)
- proteasome (1)
- protein derivatization (1)
- protein digestibility (1)
- protein targeting (1)
- protein-phenol binding (1)
- proteome (1)
- provenance (1)
- pseudo-differential boundary value problems (1)
- public administration (1)
- public utilities (1)
- quadratic expenditure system (1)
- quadratisches Ausgabensystem (1)
- radiation pressure (1)
- ratchets (1)
- ratiometric imaging (1)
- rationing (1)
- reactive oxygen species (1)
- reasoning (1)
- recurrence plot (1)
- red wine (1)
- redox regulation (1)
- reef (1)
- regioselectivity (1)
- regularization (1)
- relationship banking (1)
- remote sensing (1)
- resistin (1)
- resolvents (1)
- retinol-binding protein (1)
- retrosynthesis (1)
- retrotransposon (1)
- reversible measure (1)
- riparian zones (1)
- ruthenium (1)
- saliva proteins (1)
- salivary glands (1)
- salt stress (1)
- savanna (1)
- scaled lattice (1)
- scientific communication (1)
- screening (1)
- sealevel (1)
- search (1)
- secondary school / Prussia (1)
- sekundäre Pflanzenstoffe (1)
- self-assembly (1)
- semantic memory (1)
- semantische Merkmale (1)
- semantisches Gedächtnis (1)
- semi-Lagrangian method (1)
- semi-arid hydrology (1)
- semi-classical spectral estimates (1)
- sensorimotor function (1)
- serotonin (1)
- serum (1)
- service provider strategies (1)
- sexual dimorphism (1)
- shallow-water equations (1)
- shareholders (1)
- shoaling (1)
- sign languages (1)
- signaling (1)
- signalling pathways (1)
- simple arithmetic (1)
- simulation (1)
- single-trial-analysis (1)
- size dependent mortality (1)
- size distribution (1)
- small and medium sized enterprises (1)
- social cognition (1)
- social policy (1)
- social support (1)
- solanum tuberosum (1)
- soy (1)
- soy protein (1)
- soziale Unterstützung (1)
- spacer group (1)
- species recognition (1)
- spectral theory (1)
- spätes Holozän (1)
- standardization (1)
- star clusters (1)
- star formation (1)
- starch (1)
- starch degradation (1)
- starch phosphorylation (1)
- stars : Wolf-Rayet (1)
- stars : atmospheres (1)
- stars : early-type (1)
- stars : evolution (1)
- stars : individual : xi Per (1)
- stars : individual : zeta Oph (1)
- stars : individual : zeta Ori (1)
- stars : individual : zeta Pup (1)
- stars : mass-loss (1)
- stars : winds, outflows (1)
- state complexity (1)
- statistical physics (1)
- stereoselectivity (1)
- stimulated Brillouin scattering (1)
- stimuli-response (1)
- stochastic process (1)
- stochastic resonance (1)
- stochastics (1)
- strain (1)
- subduction (1)
- sucrose synthase (1)
- sulforaphan (1)
- sulfotranferases (1)
- sulfoxide (1)
- sulfur (1)
- surface tension (1)
- surfactants (1)
- systematics (1)
- systems biology (1)
- tailored pulse trains (1)
- tandem sequence (1)
- tantalum (1)
- teacher education (1)
- tectonophysics (1)
- teleseismic tomography (1)
- temporal discretization (1)
- temporary binding (1)
- tensile Anteile (1)
- tensile earthquakes (1)
- terrestrial carbon balance (1)
- textures (1)
- thermo-luminescence (1)
- thermo-stimulated discharge (1)
- thermodynamic modelling (1)
- thickness of the lithosphere (1)
- thin films (1)
- thio-glycosides (1)
- thiol modification (1)
- tobacco (1)
- tomato (1)
- topological community (1)
- total phenol content (1)
- tragelaphini (1)
- transepitheliales Potential (1)
- transferhydrogenation (1)
- transitorische Stärke (1)
- transitory starch (1)
- transparent-leitendes Oxid (1)
- trap-depth (1)
- tree death (1)
- tropical rainforest (1)
- tryptophan quenching (1)
- tunneling (1)
- turbulence (1)
- two-stage budgeting (1)
- type 2 diabetes mellitus (1)
- typology (1)
- tyramine (1)
- ultra heat treatment (1)
- uncertainties (1)
- ungulate behaviour (1)
- updating (1)
- vanillin (1)
- verb (1)
- vibrational resonance (1)
- virtual machine (1)
- vitamin A (1)
- von Humboldts Hand (1)
- water ice (1)
- water quality (1)
- water resources management (1)
- wavelet analysis (1)
- western blotting (1)
- wetlands (1)
- wh-scope marker (1)
- word-based morphology (1)
- work (1)
- ytterbian xenotime-(Y) (1)
- zweistufige Budgetierung (1)
- zweiwertige Kationen (1)
- zwitterionic phospholipids (1)
- zwitterionische Phospholipide (1)
- § 26 LHO (1)
- § 26 of budget laws (1)
- § 306 StGB (1)
- Öffentliche Verwaltung (1)
- Ökohydrologie (1)
- Ökosystemmodellierung (1)
- „Bewohner des West Rheins“ (1)
- „Mineralogische Beobachtungen über einige Basalte am Rhein“ (1)
- „Versuch über einige physikalische und chemische Grundsätze der Salzwerkskunde“ (1)
Institute
- Institut für Physik und Astronomie (171)
- Institut für Biochemie und Biologie (154)
- Wirtschaftswissenschaften (104)
- Institut für Chemie (84)
- Sozialwissenschaften (76)
- Öffentliches Recht (75)
- Department Psychologie (74)
- Institut für Geowissenschaften (72)
- Institut für Romanistik (65)
- Institut für Informatik und Computational Science (60)
Kommentierung von Art. 35 (Rechts- u. Amtshilfe; Hilfe in besonderen Gefahrenlagen und Notfällen)
(2006)
Golden Years
(2006)
Im Rahmen des „steirischen herbst“ 1999 unter der Intendanz von Christine Frisinghelli und im Rahmen eines von Jörg Schlick und Christoph Gurk initiierten größeren Projektes unter dem Titel „REMAKE/RE-MODEL. Secret Histories of Art, Pop, Life and The Avantgarde“ spürte eine Gruppe von KulturwissenschaftlerInnen, PhilosophInnen und AutorInnen diesen „Geheimgeschichten“ von Subkulturen nach (Diedrich Diederichsen, Matthias Haase, Juliane Rebentisch, Martin Saar, Ruth Sonderegger). In einer Installation samt eigens produziertem historischen Film von Mike Kelley, einer Retrospektive der frisch restaurierten Filme von Jack Smith, Performances von Terre Thaemlitz und Ultra-red und vor allem einem Symposium mit u.a. Douglas Crimp, Jerry Tartaglia, Gertrud Koch und den beteiligten KünstlerInnen wurde diesen Fragen nachgegangen.
Der rekonstruktive Teil des Symposiums und seine Dokumentation findet sich nun in diesem unter dem Titel GOLDEN YEARS herausgegebenen Band, der seine Aktualität nicht zuletzt aus auch nachfolgend entstandenen Beiträgen und durch die Ergänzung mit wichtigem historischen Quellenmaterial erhält.
Fluvial systems are one of the major features shaping a landscape. They adjust to the prevailing tectonic and climatic setting and therefore are very sensitive markers of changes in these systems. If their response to tectonic and climatic forcing is quantified and if the climatic signal is excluded, it is possible to derive a local deformation history. Here, we investigate fluvial terraces and erosional surfaces in the southern Chilean forearc to assess a long-term geomorphic and hence tectonic evolution. Remote sensing and field studies of the Nahuelbuta Range show that the long-term deformation of the Chilean forearc is manifested by breaks in topography, sequences of differentially uplifted marine, alluvial and strath terraces as well as tectonically modified river courses and drainage basins. We used SRTM-90-data as basic elevation information for extracting and delineating drainage networks. We calculated hypsometric curves as an indicator for basin uplift, stream-length gradient indices to identify stream segments with anomalous slopes, and longitudinal river profiles as well as DS-plots to identify knickpoints and other anomalies. In addition, we investigated topography with elevation-slope graphs, profiles, and DEMs to reveal erosional surfaces. During the first field trip we already measured palaeoflow directions, performed pebble counting and sampled the fluvial terraces in order to apply cosmogenic nuclide dating (<sup>10Be, <sup>26Al) as well as provenance analyses. Our preliminary analysis of the Coastal Cordillera indicates a clear segmentation between the northern and southern parts of the Nahuelbuta Range. The Lanalhue Fault, a NW-SE striking fault zone oblique to the plate boundary, defines the segment boundary. Furthermore, we find a complex drainage re-organisation including a drainage reversal and wind gap on the divide between the Tirúa and Pellahuén basins east of the town Tirúa. The coastal basins lost most of their Andean sediment supply areas that existed in Tertiary and in part during early Pleistocene time. Between the Bío-Bío and Imperial rivers no Andean river is recently capable to traverse the Coastal Cordillera, suggesting ongoing Quaternary uplift of the entire range. From the spatial distribution of geomorphic surfaces in this region two uplift signals may be derived: (1) a long-term differential uplift process, active since the Miocene and possibly caused by underplating of subducted trench sediments, (2) a younger, local uplift affecting only the northern part of the Nahuelbuta Range that may be caused by the interaction of the forearc with the subduction of the Mocha Fracture Zone at the latitude of the Arauco peninsula. Our approach thus provides results in our attempt to decipher the characteristics of forearc development of active convergent margins using long-term geomorphic indicators. Furthermore, it is expected that our ongoing assessment will constrain repeatedly active zones of deformation. <hr> Interdisziplinäres Zentrum für Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006
Organisation
(2006)
Die Organisation der öffentlichen Aufgabenerfüllung ist in Deutschland in den letzten Jahren unter Einfluss von zunehmendem internationalen Wettbewerb der Wirtschaftsregionen, Europäisierung, allgemein sinkenden öffentlichen Einnahmen und vor allem der negativen demographischen Entwicklung wieder verstärkt unter Modernisierungsdruck geraten. Angesichts lahmender Binnenkonjuktur, Verlagerung von Produktionsstätten ins Ausland, steigender Arbeitslosigkeit sowie Bevölkerungstrukturkrise ist wohl in fast allen Teilen der Gesellschaft die Einsicht in die Notwendigkeit einer grundlegenden Modifizierung der Organisation von öffentlicher Aufgabenwahrnehmung vorhanden. Auch die Ausgestaltung der kommunalen Selbstverwaltung als Fundament der staatlichen Ordnung und konkret örtlicher Wirkungsbereich politisch-administrativen Handelns ist wieder verstärkt ins Zentrum von grundlegenden Reformüberlegungen geraten. Die Neujustierung des öffentlichen Zuständigkeitsgefüges in den Ländern sowie die äußere und innere Architektur der kommunalen Gebietskörperschaften werden erneut diskutiert. Immer mehr Bundesländer planen umfangreiche Modernisierungsmaßnahmen ihres Verwaltungsgefüges. Von großem Interesse ist deshalb die Frage, inwieweit durch Optimierung der Zusammenarbeit von Kreisen die überörtliche Aufgabenwahrnehmung gestärkt werden kann und welche Rahmenbedingungen dabei beachtet werden müssen. Die bestehenden öffentlich-rechtlichen Handlungsformen der interkommunalen Kooperation stammen überwiegend noch aus dem 19. Jahrhundert. Als sich das Kommunalwissenschaftliche Institut diesem Untersuchungsgegenstand im Jahre 2004 zuwandte, gab es nur wenige empirische Studien und Publikationen zu diesem Thema. Zwischenzeitlich hat die Debatte zu diesem Untersuchungsgegenstand in der Fachöffentlichkeit vor allem aus Gründen des europäischem Wettbewerbsrechtes, aber auch wegen des zunehmenden Handlungsdruckes zugenommen. Unstrittig ist insoweit, dass auf diesem Feld Modernisierungsbedarf besteht (bspw. Einführung gemeinsamer Kommunalunternehmen als Anstalten des öffentlichen Rechtes). Nach einer langen Rücklauf-, Auswertungs- und Studienerstellungsphase liegen erste Ergebnisse des Projektes vor. Ohne die wertvolle Unterstützung und den fachkundigen Rat von Vertretern vom Deutschen und Brandenburgischen Landkreistag sowie der Wissenschaft wäre diese Studie nicht zustande gekommen. Besonderer Dank gilt insofern dem Engagement von Prof. Nierhaus, Prof. em. Reichard, Dr. Schliesky, Dr. Rüge, Dr. Humpert und den Beteiligten aus den befragten Landkreisen bzw. kreisfreien Städten für das Forschungsprojekt. Das Autorenteam hofft, dass diese Studie mit der Förderung des Wissensstandes über die Kreiskooperation einen Beitrag für die Diskussion in der Fachöffentlichkeit und in der Verwaltungspraxis leistet.
Aluminum-26 and beryllium-10 surface exposure dating on cut-and-fill river-terrace surfaces from the lower Sutlej Valley (northwest Himalaya) documents the close link between Indian Summer Monsoon (ISM) oscillations and intervals of enhanced fluvial incision. During the early Holocene ISM optimum, precipitation was enhanced and reached far into the internal parts of the orogen. The amplified sediment flux from these usually dry but glaciated areas caused alluviation of downstream valleys up to 120 m above present grade at ca. 9.9 k.y. B.P. Terrace formation (i.e., incision) in the coarse deposits occurred during century-long weak ISM phases that resulted in reduced moisture availability and most likely in lower sediment flux. Here, we suggest that the lower sediment flux during weak ISM phases allowed rivers to incise episodically into the alluvial fill
[1] We document late Pleistocene - Holocene aggradation and incision processes at the mountain front of the Qilian Shan, an active intracontinental fold-and-thrust belt accommodating a significant portion of the India-Asia convergence. The Shiyou River cuts through a NNE vergent fault propagation fold with Miocene red beds in the core and Pliocene - Quaternary growth strata on the northern forelimb. South of the anticline, Miocene strata dip 20 degrees SSW, suggesting a similar orientation for the basal decollement. After aggradation of an similar to 150-m-thick, late Pleistocene valley fill, the Shiyou River formed three terraces. The highest terrace, located 170 m above the river, constitutes the top of the fill. The other terraces are fill cut terraces: their treads are located 130 - 105 m and 37 m above the river, respectively. The 10 Be exposure dating of the terraces suggests that river incision accelerated from 0.8 +/- 0.2 mm yr(-1) to similar to 10 mm yr(-1) at 10 - 15 kyr. We interpret fast Holocene river incision as largely unrelated to tectonic forcing. The late Pleistocene incision rate of 0.8 +/- 0.2 mm yr(-1) places an upper limit of 2.2 +/- 0.5 mm yr(-1) on the horizontal shortening rate, assuming that incision is solely caused by rock uplift above a decollement dipping 20 degrees. However, the actual shortening rate may lie between similar to 2.2 mm yr(-1) and zero because deformation of the terraces and the valley fill cannot be unequivocally demonstrated. Our estimate is consistent with the bulk shortening rate of similar to 5 - 10 mm yr(-1) across several faults in NE Tibet derived from neotectonic and GPS data, although in case of the Shiyou River, Holocene deformation is barely discernible owing to intense climate-induced river incision.
In this paper we compare the behaviour of adverbs of frequency (de Swart 1993) like usually with the behaviour of adverbs of quantity like for the most part in sentences that contain plural definites. We show that sentences containing the former type of Q-adverb evidence that Quantificational Variability Effects (Berman 1991) come about as an indirect effect of quantification over situations: in order for quantificational variability readings to arise, these sentences have to obey two newly observed constraints that clearly set them apart from sentences containing corresponding quantificational DPs, and that can plausibly be explained under the assumption that quantification over (the atomic parts of) complex situations is involved. Concerning sentences with the latter type of Q-adverb, on the other hand, such evidence is lacking: with respect to the constraints just mentioned, they behave like sentences that contain corresponding quantificational DPs. We take this as evidence that Q-adverbs like for the most part do not quantify over the atomic parts of sum eventualities in the cases under discussion (as claimed by Nakanishi and Romero (2004)), but rather over the atomic parts of the respective sum individuals.
We present two different approaches to detect and quantify phase synchronization in the case of coupled non- phase coherent oscillators. The first one is based on the general idea of curvature of an arbitrary curve. The second one is based on recurrences of the trajectory in phase space. We illustrate both methods in the paradigmatic example of the Rossler system in the funnel regime. We show that the second method is applicable even in the case of noisy data. Furthermore, we extend the second approach to the application of chains of coupled systems, which allows us to detect easily clusters of synchronized oscillators. In order to illustrate the applicability of this approach, we show the results of the algorithm applied to experimental data from a population of 64 electrochemical oscillators
Themenschwerpunkte: Handelspolitik und Menschenrechte: Das Allgemeine Präferenzsystem Plus (APSplus) der Europäischen Union • Die UN-Konvention über die Rechte von Menschen mit Behinderungen – weitere Präzisierung des Menschenrechtsschutzes • EGMR: Jalloh ./. Deutschland • Tätigkeit des Menschenrechtsrates (Übersicht)
Three ODP sites located on the Marion Plateau, Northeast Australian margin, were investigated for clay mineral and bulk mineralogy changes through the early to middle Miocene. Kaolinite to smectite (K/S) ratios, as well as mass accumulation rates of clays, point to a marked decrease in accumulation of smectite associated with an increase in accumulation of kaolinite starting at similar to 15.6 Ma, followed by a, second increase in accumulation of kaolinite at similar to 13.2 Ma. Both of these increases are correlative to an increase in the calcite to detritus ratio. Comparison of our record with published precipitation proxies from continental Queensland indicates that increases in kaolinite did not correspond to more intense tropical-humid conditions, but instead to periods of greater aridity. Three mechanisms are explored to explain the temporal trends in clad, on the Marion Plateau: sea-level changes, changes in oceanic currents, and denudation of the Australian continent followed by reworking and eolian transport of clays. Though low mass accumulation rates of kaolinite are compatible with a possible contribution of eolian material after 14 Ma, when Australia became more arid, the lateral distribution of kaolinite along slope indicates mainly fluvial input for all clays and thus rules out this mechanism as well as oceanic current transport as the main controls behind clay accumulation on the plateau. We propose a model explaining the good correlation between long-term sea-level fall, decrease in smectite accumulation, increase in kaolinite accumulation and increase in carbonate input to the distal slope locations. We hypothesize that during low sea level and thus periods of drier continental climate in Queensland, early Miocene kaolinite-rich lacustrine deposits were being reworked, and that the progradation of the heterozoan carbonate platforms towards the basin center favored input of carbonate to the distal slope sites. The major find of our study is that increase kaolinite fluxes on the Queensland margin during the early and middle Miocene did not reflect the establishment of a tropical climate, and this stresses that care must be taken when reconstructing Australian climate based on deep-sea clay records alone.
Several previous studies have addressed the diagenetic evolution of heterozoan carbonate assemblages. Generally it is assumed that early diagenetic processes in heterozoan settings are mainly destructive, including abrasion and dissolution on the sea floor. Constructive diagenesis (cementation) is delayed to later stages in the burial environment, with pressure solution of calcitic grains acting as a cement source. This paper presents a study of Oligo- Miocene inner- to outer-ramp heterozoan carbonates from the Central Mediterranean (Maltese Islands and Sicily) indicating that early diagenetic processes are more important than previously assumed. Four to five different cement types, including fibrous, two types of epitaxial, bladed and blocky cement, are distinguished based on transmitted light microscopy. Cathodoluminescence microscopy allowed a differentiation between primary high-Mg calcitic (fibrous and epitaxial cement I) and primary low-Mg calcitic (epitaxial cement II, bladed and blocky) cements. Stable-isotope data indicate cement precipitation from marine, marine-derived, and meteoric waters. Trace-element analyses point to cementation in an open system (Maltese Islands) and a closed system (Sicily). Our investigations show that the majority of constructive diagenetic processes in these rocks occurs rather early in the shallow, marine burial environment, which is transitional between the marine seafloor and the deep-burial diagenctic environment. The main cement source in this environment is assumed to be aragonite. We suggest careful consideration of the importance of aragonitic components in fossil heterozoan settings, which seem to be more abundant than previously assumed and can act as a major early cement source. Due to the low preservation potential of these components, detailed geochemical studies are necessary to detect aragonite as the cement source. Our findings also have implications when considering the reservoir qualities of these rocks, because primary porosity can be occluded early and secondary porosity is not preserved
Trophic resources are an important control governing carbonate production. Though this importance has long been recognized, no calibration exists to quantitatively compare biogenic assemblages within trophic resource fields. This study presents a field calibration of carbonate producers in a range of settings against high-resolution in situ measurements of nutrients, temperature and salinity. With its latitudinal extent from 30 degrees to 23 degrees N, the Gulf of California, Mexico, spans the warm-temperate realm and encompasses nutrient regimes from oligo-mesotrophic in the south to eutrophic in the north. Accordingly, from south to north carbonates are characterized by: (i) coral- dominated shallow carbonate factories (5-20 m water depth) with average sea-surface temperatures of 25 degrees C (min. 18 degrees C, max. 31 degrees C), average salinities of 35.06 parts per thousand and average chlorophyll a levels, which are a proxy for nutrients, of 0.25 mg Chl a m(-3) (max. 0.48, min. 0.1). (ii) Red algal-dominated subtidal to inner- shelf carbonate formation (10-25 m) in the central Gulf of California exhibiting average temperatures of 23 degrees C (min. 18 degrees C, max. 30 degrees C), average salinities of 35.25 parts per thousand, and average Chl a levels of 0.71 Chl a m(-3) (max. 5.62, min. 0). (iii) Molluskan bryozoan-rich inner to outer shelf factories in the northern Gulf of California (20-50 m) with average sea surface temperatures of only 20 degrees C (min. 13 degrees C, max 29 degrees C), average salinities of 35.01 parts per thousand, and average contents of 2.2 mg Chl a m(-3) (max. 8.38, min. 0). By calibrating sedimentological data with in situ measured oceanographic information in different environments, the response of carbonate producers to environmental parameters was established and extrapolated to carbonates on a global scale. The results demonstrate the importance of recognizing and quantifying trophic resources as a dominant control determining the biogenic composition and facies character of both modern and fossil carbonates
Coral reefs are tropic to subtropic, coastal ecosystems comprising very diverse organisms. Late Quaternary reef deposits are fossil archives of environmental, tectonic and eustatic variations that can be used to reconstruct the paleoclimatic and paleoceano-graphic history of the tropic surface oceans. Reefs located at the latitudinal limits of coral-reef ecosystems (i.e. those at coral-reef fronts) are particularly sensitive to environmental changes-especially those associated with glacial-interglacial changes in climate and sealevel. We propose a land and ocean scientific drilling campaign in the Ryukyu Islands (the Ryukyus) in the northwestern Pacific Ocean to investigate the dynamic response of the corals and coral-reef ecosystems in this region to Late Quaternary climate and sealevel change. Such a drilling campaign, which we call the COREF (coral-reef front) Project, will allow the following three major questions to be evaluated: (i) What are the nature, magnitude and driving mechanisms of coral-reef front migration in the Ryukyus? (ii) What is the ecosystem response of coral reefs in the Ryukyus to Quaternary climate changes? (iii) What is the role of coral reefs in the global carbon cycle? Subsidiary objectives include (i) the timing of coral-reef initiation in the Ryukyus and its causes; (ii) the position of the Kuroshio current during glacial periods and its effects on coral-reef formation; and (iii) early carbonate diagenetic responses as a function of compounded variations in climate, eustacy and depositional mineralogies (subtropic aragonitic to warm-temperate calcitic). The geographic, climatic and oceanographic settings of the Ryukyu Islands provide an ideal natural laboratory to address each of these research questions.
The first goal of the present work focuses on the need for different rationing methods of the The Global Change and Financial Transition (GFT) work- ing group at the Potsdam Institute for Climate Impact Research (PIK): I provide a toolbox which contains a variety of rationing methods to be ap- plied to micro-economic disequilibrium models of the lagom model family. This toolbox consists of well known rationing methods, and of rationing methods provided specifically for lagom. To ensure an easy application the toolbox is constructed in modular fashion. The second goal of the present work is to present a micro-economic labour market where heterogenous labour suppliers experience consecu- tive job opportunities and need to decide whether to apply for employ- ment. The labour suppliers are heterogenous with respect to their qualifi- cations and their beliefs about the application behaviour of their competi- tors. They learn simultaneously – in Bayesian fashion – about their individ- ual perceived probability to obtain employment conditional on application (PPE) by observing each others’ application behaviour over a cycle of job opportunities.
For the first time, site-selective distortion has been investigated for two different structural units in the ternary compound alpha-GaPO4 under the influence of a permanent external electric field. Based on 54 measured reflection intensities, the electric-field-induced distortion of PO4 and GaO4 tetrahedra in alpha-GaPO4 crystals is evaluated using a model of pseudoatomic displacements introduced recently [Gorfman, Tsirelson & Pietsch (2005). Acta Cryst. A61, 387- 396]. A stronger variation of the P-O bond lengths in the PO4 tetrahedron was found compared to the bonds in the GaO4 tetrahedron. The different distortions of the tetrahedra owing to the electric field were analysed in terms of the valence charge density of alpha-GaPO4 and its topological characteristics. The larger charge of the P pseudoatom compared to the Ga atom was recognized as the main reason for the higher sensitivity of the PO4 tetrahedron to a permanent external electric field
Archival X-ray spectra of the four prominent single, non-magnetic O stars zeta Pup, zeta Ori, xi Per and zeta Oph, obtained in high resolution with Chandra HETGS/MEG have been studied. The resolved X-ray emission line profiles provide information about the shocked, hot gas which emits the X-radiation, and about the bulk of comparably cool stellar wind material which partly absorbs this radiation. In this paper, we synthesize X-ray line profiles with a model of a clumpy stellar wind. We find that the geometrical shape of the wind inhomogeneities is important: better agreement with the observations can be achieved with radially compressed clumps than with spherical clumps. The parameters of the model, i.e. chemical abundances, stellar radius, mass-loss rate and terminal wind velocity, are taken from existing analyses of UV and optical spectra of the programme stars. On this basis, we also calculate the continuum-absorption coefficient of the cool-wind material, using the Potsdam Wolf-Rayet (POWR) model atmosphere code. The radial location of X-ray emitting gas is restricted from analysing the FIR line ratios of helium-like ions. The only remaining free parameter of our model is the typical distance between the clumps; here, we assume that at any point in the wind there is one clump passing by per one dynamical time-scale of the wind. The total emission in a model line is scaled to the observation. There is a good agreement between synthetic and observed line profiles. We conclude that the X-ray emission line profiles in O stars can be explained by hot plasma embedded in a cool wind which is highly clumped in the form of radially compressed shell fragments.
The arid Puna plateau of the southern Central Andes is characterized by Cenozoic distributed shortening forming intramontane basins that are disconnected from the humid foreland because of the defeat of orogen-traversing channels. Thick Tertiary and Quaternary sedimentary fills in Puna basins have reduced topographic contrasts between the compressional basins and ranges, leading to a typical low-relief plateau morphology. Structurally identical basins that are still externally drained straddle the eastern border of the Puna and document the eastward propagation of orographic barriers and ensuing aridification. One of them, the Angastaco basin, is transitional between the highly compartmentalized Puna highlands and the undeformed Andean foreland. Sandstone petrography, structural and stratigraphic analysis, combined with detrital apatite fission-track thermochronology from a similar to 6200-m-thick Miocene to Pliocene stratigraphic section in the Angastaco basin, document the late Eocene to late Pliocene exhumation history of source regions along the eastern border of the Puna (Eastern Cordillera (EC)) as well as the construction of orographic barriers along the southeastern flank of the Central Andes. Onset of exhumation of a source in the EC in late Eocene time as well as a rapid exhumation of the Sierra de Luracatao (in the EC) at about 20 Ma are recorded in the detrital sediments of the Angastaco basin. Sediment accumulation in the basin began similar to 15 Ma, a time at which the EC had already built sufficient topography to prevent Puna sourced detritus from reaching the basin. After similar to 13 Ma, shortening shifted eastward, exhuming ranges that preserve an apatite fission-track partial annealing zone recording cooling during the late Cretaceous rifting event. Facies changes and fossil content suggest that after 9 Ma, the EC constituted an effective orographic barrier that prevented moisture penetration into the plateau. Between 3.4 and 2.4 Ma, another orographic barrier was uplifted to the east, leading to further aridification and pronounced precipitation gradients along the mountain front. This study emphasizes the important role of tectonics in the evolution of climate in this part of the Andes
The Cenozoic Tian Shan is one of the preeminent examples of an intracontinental orogen. However, there remains a significant controversy over when deformation related to the India-Asia collision commenced and therefore how shortening within the mountains has been partitioned over time. One approach has been to look at the modem shortening rate as measured by geodetic studies, combined with estimates of the total shortening across the range and extrapolate backwards. This approach suggests that the onset of range construction was ca. 10 Ma [K.Y. Abdrakhmatov, S.A. Aldazhanov, B.H. Hager, M.W Hamburger, T.A. Herring, K.B. Kalabaev, K.B. Kalabayev, V.I. Makarov, P. Molnar, S.V Panasyuk, M.T. Prilepin, R.E. Reilinger, I.S. Sadybakasov, B.J. Souter, Y.A. Trapeznikov, V.Y. Tsurkov, A.V. Zubovich, Relatively recent construction of the Tien Shan inferred from GPS measurements of present-day crustal deformation rates, Nature 384 (6608) (1996) 450-453]. An alternate method is to determine the age of the onset of exhumation using thermochronology. We present 19 new apatite fission-track (AFT) results from the southwestern Chinese portion of the belt; this region represents the first area exhumed during the late Tertiary along a transect at ca. 76 degrees E. Exhumation commenced at the Oligocene-Miocene boundary (similar to 24 Ma) along the Maidan and Muziduke thrusts, which bound the southern side of the Kokshaal range. Subsequently, deformation propagated ca. 20 km south to the Kashi basin- bounding thrust (KBT), which was exhumed by no earlier than 18.9 +/- 3.3 Ma. Three detrital AFT samples from Plio- Pleistocene strata deposited ca. 20 km farther south contain fission track grain age peaks that young monotonically upwards from 20.9 + 7.0/- 5.3 Ma to 15.9 + 5.4/- 4.0 Ma with a fairly constant lag time of 16 to 18 Ma. These ages, combined with structural data, suggest that both the hanging wall and the footwall of the KBT experienced a renewed episode of exhumation during the latest Cenozoic. The discrepancy between the Late Oligocene-Miocene initiation of significant exhumation shown herein and the 10 Ma initiation estimate from geodesy suggests that the Tian Shan has undergone a complex Late Cenozoic shortening history. Assuming that the present shortening rate could account for the total amount of Cenozoic shortening in 10 Ma and realizing that shortening initiated at least 15 Myr earlier, we conclude that the shortening rate must have varied over time, possibly in pulsed-southward migrating events, and that the present rate may not reflect the average rate since initiation of range uplift. (c) 2006 Elsevier B.V. All rights reserved
Intramontane sedimentary basins along the margin of continental plateaus often preserve strata that contain fundamental information regarding the pattern of orogenic growth. The sedimentary record of the elastic Miocene-Pliocene sequence deposited in the Fiambala Basin, at the southern margin of the Puna Plateau (NW Argentina), documents the late Miocene paleodrainage evolution from headwaters to the west, towards headwaters in the ranges that constitute the border of the Puna Plateau to the north. Apatite Fission track (AFT) thermochronology of sedimentary and basement rocks show that the southern Puna Plateau was the source for the youngest, middle Miocene, detrital population detected in late Miocene rocks; and that the margin of the Puna Plateau expressed a high relief, possibly similar to or higher than at present, by late Miocene time. Cooling ages obtained from basement rocks at the southern Puna margin suggest that exhumation started in the Oligocene and continued until the middle Miocene. We interpret the basin reorganization and the creation of a high relief plateau margin to be the direct response of the source-basin system to a wholesale surface uplift event that may have occurred during the late Cenozoic in the Puna-Altiplano region. At this time coeval paleodrainage reorganization is observed not only in the Fiambala Basin, but also in different basins along the southern and eastern Puna margin, suggesting a genetic link between the last stage of plateau formation and basin response. However, this event did not cause sufficient exhumation of basin bounding ranges to be recorded by AFT thermochronology. Our new data thus document a decoupling between late Cenozoic surface uplift and exhumation in the southern Puna Plateau. High relief achieved at the Puna margin by late Miocene time is linked to Oligocene-Miocene exhumation; no significant erosion (< 3 km) has occurred since in this and highland.
Metamorphic dome complexes occur within the internal structures of the northern Himalaya and southern Tibet. Their origin, deformation, and fault displacement patterns are poorly constrained. We report new field mapping, structural data, and cooling ages from the western flank of the Leo Pargil dome in the northwestern Himalaya in an attempt to characterize its post-middle Miocene structural development. The western flank of the dome is characterized by shallow, west-dipping pervasive foliation and WNW-ESE mineral lineation. Shear-sense indicators demonstrate that it is affected by east-west normal faulting that facilitated exhumation of high-grade metamorphic rocks in a contractional setting. Sustained top-to-northwest normal faulting during exhumation is observed in a progressive transition from ductile to brittle deformation. Garnet and kyanite indicate that the Leo Pargil dome was exhumed from the mid-crust. Ar- 40/Ar-39 mica and apatite fission track (AFT) ages constrain cooling and exhumation pathways front 350 to 60 degrees C and suggest that the dome cooled in three stages since the middle Miocene. Ar-40/Ar-39 white mica ages of 16-14 Ma suggest a first phase of rapid cooling and provide minimum estimates for the onset of dome exhumation. AFT ages between 10 and 8 Ma suggest that ductile fault displacement had ceased by then, and AFT track-length data from high-elevation samples indicate that the rate of cooling had decreased significantly. We interpret this to indicate decreased fault displacement along the Leo Pargil shear zone and possibly a transition to the Kaurik-Chango normal fault system between 10 and 6 Ma. AFT ages from lower elevations indicate accelerated cooling since the Pliocene that cannot be related to pure fault displacement, and therefore may reflect more pronounced regionally distributed and erosion-driven exhumation
[1] The Kyrgyz Range, the northernmost portion of the Kyrgyzstan Tien Shan, displays topographic evidence for lateral propagation of surface uplift and exhumation. The highest, most deeply dissected segment lies in the center of the range. To the east, topography and relief decrease, and preserved remnants of a Cretaceous regional erosion surface imply minimal amounts of bedrock exhumation. The timing of exhumation of range segments defines the lateral propagation rate of the range-bounding reverse fault and quantifies the time and erosion depth needed to transform a mountain range from a juvenile to a mature morphology. New multicompositional apatite fission track ( AFT) data from three transects from the eastern Kyrgyz Range, combined with published AFT data, demonstrate that the range has propagated over 110 km eastward over the last similar to 7 - 11 Myr. On the basis of the thermal and topographic evolutionary history, we present a model for a time-varying exhumation rate driven by rock uplift and changes in erodability and the timescale of geomorphic adjustment to surface uplift. Easily eroded, Cenozoic sedimentary rocks overlying resistant basement control early, rapid exhumation and exhibit slow surface uplift rates. As increasing amounts of resistant basement are exposed, exhumation rates decrease while surface uplift rates are sustained or increase, thereby growing topography. As the range becomes high enough to cause ice accumulation and to develop steep river valleys, fluvial and glacial erosion becomes more powerful, and exhumation rates once again increase. Independently determined range-normal shortening rates also varied over time, suggesting a feedback between erosional efficiency and shortening rate
[ 1] For the Puna Plateau and Eastern Cordillera of NW Argentina, the temporal and spatial pattern of deformation and surface uplift remain poorly constrained. Analysis of completely and partially reset apatite fission track samples collected from vertical profiles along an ESE trending transect extending from the plateau interior across the southern Eastern Cordillera at similar to 25 degrees S reveals important constraints on the deformation and exhumation history of this part of the Andes. The data constrain the Neogene Andean development of the Eastern Cordillera as well as rift-related exhumation for some of the sampled locations in the Late Jurassic/Early Cretaceous. An intervening Eocene-Oligocene exhumation episode in the southern Eastern Cordillera was probably related to crustal shortening. Subsequent reburial of the area by Andean foreland basin strata commenced between 30 and 25 Myr. Magnitude and duration of sedimentation, revealed by thermal modeling, differ between the sample locations, pointing to an eastward propagating basin system. In the southern Eastern Cordillera, Andean deformation commenced at 22.5 - 21 Myr, predating both the inferred formation of significant topography by 5 - 7.5 Myr and preservation of sediments in the adjacent Cenozoic basins by 6.5 - 8 Myr. Comparing the calculated structural depth of partially reset samples suggests that newly formed west dipping reverse faults along the former Salta Rift margin accommodated most of the Neogene tectonic movement. Late Cenozoic deformation at the southern Eastern Cordillera began earlier in the west and subsequently propagated eastward. The lateral growth of the orogen is coupled with a foreland basin system developing in front of the range and then becomes subsequently compartmentalized by later emergent topography.
The acetone extracts of the root bark and stem bark of Erythrina sacleuxii showed antiplasmodial activities against the chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum. Chromatographic separation of the acetone extract of the root bark afforded a new isoflavone, 7-hydroxy-4 -methoxy-3'- prenylisoflavone (trivial name 5-deoxy-3' - prenylbiochanin A) along with known isoflavonoids as the antiplasmodial principles. Flavonoids and isoflavonoids isolated from the stem bark of E. sucleuxii were also tested and showed antiplasmodial activities. The structures were determined on the basis of spectroscopic evidence.
Ferroelectrets are thin films of polymer foams, exhibiting piezoelectric properties after electrical charging. Ferroelectret foams usually consist of a cellular polymer structure filled with air. Polymer-air composites are elastically soft due to their high air content as well as due to the size and shape of the polymer walls. Their elastically soft composite structure is one essential key for the working principle of ferroelectrets, besides the permanent trapping of electric charges inside the polymer voids. The elastic properties allow large deformations of the electrically charged voids. However, the composite structure can also possibly limit the stability and consequently the range of applications because of, e. g., penetration of gas and liquids accompanied by discharge phenomena or because of a mechanical pre-load which may be required during the application. Here, we discuss various stability aspects related to the piezoelectric properties of polypropylene ferroelectrets. Near and below room temperature, the piezoelectric effect and the stability of the trapped charges are practically independent from humidity during long-time storage in a humid atmosphere or water, or from operating conditions, such as continuous mechanical excitation. Thermal treatment of cellular polypropylene above -10 degrees C leads to a softening of the voided structure which is apparent from the decreasing values of the elastic modulus. This decrease results in an increase of the piezoelectric activity. Heating above 60 degrees C, however, leads to a decrease in piezoelectricity
We report measurements on the synchronization properties of organ pipes. First, we investigate influence of an external acoustical signal from a loudspeaker on the sound of an organ pipe. Second, the mutual influence of two pipes with different pitch is analyzed. In analogy to the externally driven, or mutually coupled self-sustained oscillators, one observes a frequency locking, which can be explained by synchronization theory. Further, we measure the dependence of the frequency of the signals emitted by two mutually detuned pipes with varying distance between the pipes. The spectrum shows a broad '' hump '' structure, not found for coupled oscillators. This indicates a complex coupling of the two organ pipes leading to nonlinear beat phenomena.
Polyvinylidene fluoride was dissolved together with solid sodium hydroxide as catalyst in a dimethylsulfoxide/ acetone mixture and moderately dehydrofluorinated. The dehydrofluorination leads to a partial degradation of the fluorohydrocarbons, and in particular to main-chain scission and to formation of carbon double or triple bonds. This enhances the absorption at UV-vis frequencies. The degradation process also generates a large amount of excess charges in the polymer, which influence the electrical polarization behavior of the dehydrofluorinated polymer. Uniaxial stretching of moderately dehydrofluorinated polyvinylidene fluoride leads to films in a polar phase. Dipole polarization in the degraded and stretched films is demonstrated by means of switching experiments
In this paper, a measuring technique is presented for the detection of radial oscillations of tube walls excited by changes in internal air pressure. On organ pipes, the oscillations were investigated by means of piezoelectric polymer films slightly tensioned around the pipe bodies. Employing sensors with patterned electrodes, the well-known elliptical oscillation of the cross section as well as an additional monopole breathing of the organ-pipe body were detected. For the monopole breathing, a close relationship between the pressure distribution of the air-column resonances inside the pipe and the circumference variations along the pipe was observed
Relaxation processes at the glass transition in polyamide 11 : From rigidity to viscoelasticity
(2006)
Elastic properties and electromechanical coupling factor of inflated polypropylene ferroelectrets
(2006)
New ferroelectrets were developed on the basis of foams from cyclo-olefin polymers and copolymers. The results obtained on the cyclo-olefin polymer foam demonstrate a significant improvement of the service temperature for ferroelectret transducer materials. Suitable compounding and preparation led to cyclo-olefin ferroelectrets with an electromechanical activity of around 15 pC/N, which is thermally stable at least up to 110 degrees C. The properties in sensor and actuator applications are strongly dependent on the processing parameters related to film-making, sensor and actuator preparation, gas content and electric charging. The processing window for the film stretching was very narrow compared to the earlier developed polypropylene ferroelectrets. The film porosity, softness and thus the electromechanical activity are adjusted by gas-diffusion expansion. The activity of the electromechanically operating sensors and actuators was increased by stacking several layers of cellular cyclo-olefin film. For applications such as flat loudspeakers, the foamed films are tuned by tensioning them on a support frame. Correct tensioning was essential also for reducing the distortion levels.
Relaxation processes at the glass transition in polyamide 11: From rigidity to viscoelasticity
(2006)
Relaxation processes associated with the glass transition in nonferroelectric and ferroelectric polyamide (PA) 11 are investigated by means of differential scanning calorimetry, dynamic mechanical analysis, and dielectric relaxation spectroscopy (DRS) in order to obtain information about the molecular mobility within the amorphous phase. In particular, the effects of melt quenching, cold drawing, and annealing just below the melting region are studied with respect to potential possibilities and limitations for improving the piezoelectric and pyroelectric properties of PA 11. A relaxation map is obtained from DRS that shows especially the crossover region where the cooperative alpha relaxation and the local beta relaxation merge into a single high-temperature process. No fundamental difference between quenched, cold-drawn, and annealed films is found, though in the cold-drawn (ferroelectric) film the alpha relaxation is suppressed and slowed down, but it is at least partly recovered by subsequent annealing. It is concluded that there exists an amorphous phase in all structures, even in the cold-drawn film. The amorphous phase can be more rigid or more viscoelastic depending on preparation. Cold drawing not only leads to crystallization in a ferroelectric form but also to higher rigidity of the remaining amorphous phase. Annealing just below the melting region after cold drawing causes a stronger phase separation between the crystalline phase and a more viscoelastic amorphous phase.
Fast, three-dimensional polarization mapping in piezoelectric sensor cables was performed by means of the novel thermal-pulse tomography (TPT) technique with a lateral resolution of 200 mum. The active piezoelectric cable material (a copolymer of polyvinylidene fluoride with trifluoroethylene) was electrically poled with a point-to-cable corona discharge. A focused laser was employed to heat the opaque outer electrode, and the short-circuit current generated by the thermal pulse was used to obtain 3D polarization maps via the scale transformation method. The article describes the TPT technique as a fast non-destructive option for studying cylindrical geometries.
Am 24. und 25. Juni 2005 fand die siebte Konferenz des Forschungskreises Vereinte Nationen an der Universität Potsdam statt. Die Konferenz befaßte sich mit dem Thema „Chancen für eine Reform der Vereinten Nationen? Bilanz zum 60. Geburtstag der Weltorganisation".
Die Verbindung von Wissenschaft und Praxis auf der einen und die Beteiligung unterschiedlicher Disziplinen auf der anderen Seite sind für die „Potsdamer UNO-Konferenzen" kennzeichnend. Die sieben Referate, die jeweils mit Zusammenfassungen der anschließenden Diskussionen dokumentiert werden, tragen dementsprechend dazu bei, wichtige Tätigkeitsbereiche und Strukturfragen der Vereinten Nationen aus unterschiedlichen Blickwinkeln zu diskutieren.
Diese Broschüre soll allen Interessierten die Möglichkeit geben, wichtige Aspekte der Diskussion über - beispielsweise - Strukturreformen im Bereich der Menschenrechtsvertragsausschüsse, die Zukunft humanitärer Interventionen, das Verhältnis von Friedenssicherung und Friedenskonsolidierung oder konkrete Reformbestrebungen beim Umweltprogramm UNEP kennenzulernen.
Der Forschungskreis dankt der Juristischen Fakultät der Universität Potsdam für die Gastfreundschaft und dem MenschenRechtsZentrum der Universität Potsdam für die Kooperation bei der Organisation der traditionell am letzten Wochenende im Juni stattfindenden Konferenz. Besonderer Dank gilt der Deutschen Gesellschaft der Vereinten Nationen, Landesverband Berlin-Brandenburg, die die Konferenz finanziell unterstützt
hat.
Anläßlich des 60. Jahrestages der Unterzeichnung der Charta der Vereinten Nationen, in dessen zeitlicher Nähe die Konferenz stattfand, lud die Deutsche Gesellschaft für die Vereinten Nationen am ersten Konferenztag zu einem Sektempfang; ihr sei hierfür herzlich gedankt.
I. Introduction
II. Current challenges to the United Nations Human Rights Programme
III. The Secretary General’s Reform report “In larger Freedom” andits impact for the human rights programme
IV. The High Commissioner’s Plan of Action of May 2005
V. Negotiations on the establishment of the Human Rights Counciland first Council activities
VI. Reform of the treaty body system and debates over the creationof a unified standing treaty body
In view of the importance of charge storage in polymer electrets for electromechanical transducer applications, the aim of this work is to contribute to the understanding of the charge-retention mechanisms. Furthermore, we will try to explain how the long-term storage of charge carriers in polymeric electrets works and to identify the probable trap sites. Charge trapping and de-trapping processes were investigated in order to obtain evidence of the trap sites in polymeric electrets. The charge de-trapping behavior of two particular polymer electrets was studied by means of thermal and optical techniques. In order to obtain evidence of trapping or de-trapping, charge and dipole profiles in the thickness direction were also monitored. In this work, the study was performed on polyethylene terephthalate (PETP) and on cyclic-olefin copolymers (COCs). PETP is a photo-electret and contains a net dipole moment that is located in the carbonyl group (C = O). The electret behavior of PETP arises from both the dipole orientation and the charge storage. In contrast to PETP, COCs are not photo-electrets and do not exhibit a net dipole moment. The electret behavior of COCs arises from the storage of charges only. COC samples were doped with dyes in order to probe their internal electric field. COCs show shallow charge traps at 0.6 and 0.11 eV, characteristic for thermally activated processes. In addition, deep charge traps are present at 4 eV, characteristic for optically stimulated processes. PETP films exhibit a photo-current transient with a maximum that depends on the temperature with an activation energy of 0.106 eV. The pair thermalization length (rc) calculated from this activation energy for the photo-carrier generation in PETP was estimated to be approx. 4.5 nm. The generated photo-charge carriers can recombine, interact with the trapped charge, escape through the electrodes or occupy an empty trap. PETP possesses a small quasi-static pyroelectric coefficient (QPC): ~0.6 nC/(m²K) for unpoled samples, ~60 nC/(m²K) for poled samples and ~60 nC/(m²K) for unpoled samples under an electric bias (E ~10 V/µm). When stored charges generate an internal electric field of approx. 10 V/µm, they are able to induce a QPC comparable to that of the oriented dipoles. Moreover, we observe charge-dipole interaction. Since the raw data of the QPC-experiments on PETP samples is noisy, a numerical Fourier-filtering procedure was applied. Simulations show that the data analysis is reliable when the noise level is up to 3 times larger than the calculated pyroelectric current for the QPC. PETP films revealed shallow traps at approx. 0.36 eV during thermally-stimulated current measurements. These energy traps are associated with molecular dipole relaxations (C = O). On the other hand, photo-activated measurements yield deep charge traps at 4.1 and 5.2 eV. The observed wavelengths belong to the transitions in PETP that are analogous to the π - π* benzene transitions. The observed charge de-trapping selectivity in the photocharge decay indicates that the charge detrapping is from a direct photon-charge interaction. Additionally, the charge de-trapping can be facilitated by photo-exciton generation and the interaction of the photo-excitons with trapped charge carriers. These results indicate that the benzene rings (C6H4) and the dipolar groups (C = O) can stabilize and share an extra charge carrier in a chemical resonance. In this way, this charge could be de-trapped in connection with the photo-transitions of the benzene ring and with the dipole relaxations. The thermally-activated charge release shows a difference in the trap depth to its optical counterpart. This difference indicates that the trap levels depend on the de-trapping process and on the chemical nature of the trap site. That is, the processes of charge detrapping from shallow traps are related to secondary forces. The processes of charge de-trapping from deep traps are related to primary forces. Furthermore, the presence of deep trap levels causes the stability of the charge for long periods of time.
This thesis discusses challenges in IT security education, points out a gap between e-learning and practical education, and presents a work to fill the gap. E-learning is a flexible and personalized alternative to traditional education. Nonetheless, existing e-learning systems for IT security education have difficulties in delivering hands-on experience because of the lack of proximity. Laboratory environments and practical exercises are indispensable instruction tools to IT security education, but security education in conventional computer laboratories poses particular problems such as immobility as well as high creation and maintenance costs. Hence, there is a need to effectively transform security laboratories and practical exercises into e-learning forms. In this thesis, we introduce the Tele-Lab IT-Security architecture that allows students not only to learn IT security principles, but also to gain hands-on security experience by exercises in an online laboratory environment. In this architecture, virtual machines are used to provide safe user work environments instead of real computers. Thus, traditional laboratory environments can be cloned onto the Internet by software, which increases accessibility to laboratory resources and greatly reduces investment and maintenance costs. Under the Tele-Lab IT-Security framework, a set of technical solutions is also proposed to provide effective functionalities, reliability, security, and performance. The virtual machines with appropriate resource allocation, software installation, and system configurations are used to build lightweight security laboratories on a hosting computer. Reliability and availability of laboratory platforms are covered by a virtual machine management framework. This management framework provides necessary monitoring and administration services to detect and recover critical failures of virtual machines at run time. Considering the risk that virtual machines can be misused for compromising production networks, we present a security management solution to prevent the misuse of laboratory resources by security isolation at the system and network levels. This work is an attempt to bridge the gap between e-learning/tele-teaching and practical IT security education. It is not to substitute conventional teaching in laboratories but to add practical features to e-learning. This thesis demonstrates the possibility to implement hands-on security laboratories on the Internet reliably, securely, and economically.
E-learning is a flexible and personalized alternative to traditional education. Nonetheless, existing e-learning systems for IT security education have difficulties in delivering hands-on experience because of the lack of proximity. Laboratory environments and practical exercises are indispensable instruction tools to IT security education, but security education in con-ventional computer laboratories poses the problem of immobility as well as high creation and maintenance costs. Hence, there is a need to effectively transform security laboratories and practical exercises into e-learning forms. This report introduces the Tele-Lab IT-Security architecture that allows students not only to learn IT security principles, but also to gain hands-on security experience by exercises in an online laboratory environment. In this architecture, virtual machines are used to provide safe user work environments instead of real computers. Thus, traditional laboratory environments can be cloned onto the Internet by software, which increases accessibilities to laboratory resources and greatly reduces investment and maintenance costs. Under the Tele-Lab IT-Security framework, a set of technical solutions is also proposed to provide effective functionalities, reliability, security, and performance. The virtual machines with appropriate resource allocation, software installation, and system configurations are used to build lightweight security laboratories on a hosting computer. Reliability and availability of laboratory platforms are covered by the virtual machine management framework. This management framework provides necessary monitoring and administration services to detect and recover critical failures of virtual machines at run time. Considering the risk that virtual machines can be misused for compromising production networks, we present security management solutions to prevent misuse of laboratory resources by security isolation at the system and network levels. This work is an attempt to bridge the gap between e-learning/tele-teaching and practical IT security education. It is not to substitute conventional teaching in laboratories but to add practical features to e-learning. This report demonstrates the possibility to implement hands-on security laboratories on the Internet reliably, securely, and economically.
With increasing number of applications in Internet and mobile environments, distributed software systems are demanded to be more powerful and flexible, especially in terms of dynamism and security. This dissertation describes my work concerning three aspects: dynamic reconfiguration of component software, security control on middleware applications, and web services dynamic composition. Firstly, I proposed a technology named Routing Based Workflow (RBW) to model the execution and management of collaborative components and realize temporary binding for component instances. The temporary binding means component instances are temporarily loaded into a created execution environment to execute their functions, and then are released to their repository after executions. The temporary binding allows to create an idle execution environment for all collaborative components, on which the change operations can be immediately carried out. The changes on execution environment will result in a new collaboration of all involved components, and also greatly simplifies the classical issues arising from dynamic changes, such as consistency preserving etc. To demonstrate the feasibility of RBW, I created a dynamic secure middleware system - the Smart Data Server Version 3.0 (SDS3). In SDS3, an open source implementation of CORBA is adopted and modified as the communication infrastructure, and three secure components managed by RBW, are created to enhance the security on the access of deployed applications. SDS3 offers multi-level security control on its applications from strategy control to application-specific detail control. For the management by RBW, the strategy control of SDS3 applications could be dynamically changed by reorganizing the collaboration of the three secure components. In addition, I created the Dynamic Services Composer (DSC) based on Apache open source projects, Apache Axis and WSIF. In DSC, RBW is employed to model the interaction and collaboration of web services and to enable the dynamic changes on the flow structure of web services. Finally, overall performance tests were made to evaluate the efficiency of the developed RBW and SDS3. The results demonstrated that temporary binding of component instances makes slight impacts on the execution efficiency of components, and the blackout time arising from dynamic changes can be extremely reduced in any applications.
Balance ist als die koordinative Fähigkeit anzusehen, die am meisten durch das Sinnes- und Nervensystem determiniert ist. Damit könnte sie als Indikator für Funktionseinschränkungen des Nervensystems - etwa bei Lernstörungen - von Wert sein. Aussagen über Zusammenhänge zwischen Balance und Kognition werden vielfach diskutiert, sind jedoch noch nicht hinreichend wissenschaftlich gesichert. Hieraus wird die zentrale Zielstellung der Arbeit abgeleitet, das Wissen über somatische und psychische Determinanten von Balance zu erweitern. Betrachtet werden daher bei Vorschulkindern mögliche Zusammenhänge mit dem Geschlecht, mit den anthropometrischen Parametern Körperhöhe und Fußgröße, mit Statikstörungen des Beckens und der Intelligenzleistung. An der Studie nahmen insgesamt 201 drei- bzw. vierjährige Kinder sowie 148 fünf- bzw. sechsjährige Kinder teil. Die Balancefähigkeit wurde mit Hilfe einer Kraftmomentenplattform sowie eines klinischen Tests erfasst und mit anthropometrischen Parametern, qualitativen statischen Befunden bzw. den Ergebnissen des BIVA-Intelligenztests nach SCHAARSCHMIDT verglichen. Für die Auswertung der Balanceparameter wurden sowohl lineare als auch nichtlineare Verfahren eingesetzt, die zum Teil gegenläufige Trends in Bezug auf Zusammenhänge lieferten. Im Ergebnis konnte ein starker Einfluss des Geschlechts nachgewiesen werden. Mädchen zeigten eine bessere Balanceleistung als Jungen sowohl bei 3-Jährigen als auch bei 6-Jährigen. Dies wird als Beleg für den geschlechtsspezifischen Vorsprung der sensomotorischen Entwicklung bei den Mädchen im Alter von 3 bis 6 Jahren angesehen. Außerdem gab es einige Hinweise auf einen Zusammenhang mit der Körperhöhe bzw. Fußlänge. Ein Zusammenhang mit den Umstellungen des ersten Gestaltwandels wird vermutet. Die Daten sprechen für einen statistisch schwachen Einfluss von Störungen der Beckenstatik (Beckenverwringung) auf die Balance bei den Kindern. Es wird vermutet, dass die Verrechnung Balance relevanter Inputs durch nozizeptive Impulse beeinträchtig werden kann. Dies könnte Anlass sein, diesen Aspekt bei Funktionsstörungen mit zu berücksichtigen. Signifikante Zusammenhänge mit Ergebnissen des BIVA-Intelligenztests konnten kaum gefunden werden. Allerdings fallen überzufällig viele Mittelwertvergleiche in Richtung der Hypothese aus, erreichen jedoch nicht Signifikanzniveau. Dies könnte ein Hinweis auf einen schwachen Zusammenhang darstellen, der jedoch mit einer größeren Gruppe noch bestätigt werden müsste. Weitere Forschung auf diesem Gebiet ist erforderlich. Sollte hinreichende Evidenz erreicht werden können, so könnte in der Förderung koordinativer Fähigkeiten und insbesondere der posturalen Balance eine wichtige pädagogische Reserve liegen.
We give a new view on building content clusters from page pair models. We measure the heuristic importance within every two pages by computing the distance of their accessed positions in usage sessions. We also compare our page pair models with the classical pair models used in information theories and natural language processing, and give different evaluation methods to build the reasonable content communities. And we finally interpret the advantages and disadvantages of our models from detailed experiment results