60812
2020
2020
eng
1
25
25
9
8
article
Wiley-Blackwell
Hoboken
1
2020-06-18
2020-06-18
--
Exploring the drivers of global and local sea‐level change over the 21st century and beyond
We present a new set of global and local sea‐level projections at example tide gauge locations under the RCP2.6, RCP4.5, and RCP8.5 emissions scenarios. Compared to the CMIP5‐based sea‐level projections presented in IPCC AR5, we introduce a number of methodological innovations, including (i) more comprehensive treatment of uncertainties, (ii) direct traceability between global and local projections, and (iii) exploratory extended projections to 2300 based on emulation of individual CMIP5 models. Combining the projections with observed tide gauge records, we explore the contribution to total variance that arises from sea‐level variability, different emissions scenarios, and model uncertainty. For the period out to 2300 we further breakdown the model uncertainty by sea‐level component and consider the dependence on geographic location, time horizon, and emissions scenario. Our analysis highlights the importance of local variability for sea‐level change in the coming decades and the potential value of annual‐to‐decadal predictions of local sea‐level change. Projections to 2300 show a substantial degree of committed sea‐level rise under all emissions scenarios considered and highlight the reduced future risk associated with RCP2.6 and RCP4.5 compared to RCP8.5. Tide gauge locations can show large ( > 50%) departures from the global average, in some cases even reversing the sign of the change. While uncertainty in projections of the future Antarctic ice dynamic response tends to dominate post‐2100, we see substantial differences in the breakdown of model variance as a function of location, time scale, and emissions scenario.
Earth's future
10.1029/2019EF001413
2328-4277
e2019EF001413
<a href="https://doi.org/10.25932/publishup-54988">Zweitveröffentlichung in der Schriftenreihe Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1353</a>
Matthew D. Palmer
2746403-9
false
false
CC-BY - Namensnennung 4.0 International
Matthew D. Palmer
Jonathan Gregory
Meike Bagge
Daley Calvert
Jan Marius Hagedoorn
Tom Howard
Volker Klemann
Jason A. Lowe
Chris Roberts
Aimee B. A. Slangen
Giorgio Spada
eng
uncontrolled
climate change
eng
uncontrolled
CMIP5 models
eng
uncontrolled
RCP scenarios
eng
uncontrolled
sea-level projections
eng
uncontrolled
tide gauge observations
Geowissenschaften
Institut für Geowissenschaften
Referiert
Gold Open-Access
DOAJ gelistet
60814
2020
2020
eng
1
9
9
1
2
article
American Physical Society
Ridge, NY
1
2020-03-19
2020-03-19
--
Effective mass enhancement and ultrafast electron dynamics of Au(111) surface state coupled to a quantum well
We show that, although the equilibrium band dispersion of the Shockley-type surface state of two-dimensional Au(111) quantum films grown on W(110) does not deviate from the expected free-electron-like behavior, its nonequilibrium energy-momentum dispersion probed by time- and angle-resolved photoemission exhibits a remarkable kink above the Fermi level due to a significant enhancement of the effective mass. The kink is pronounced for certain thicknesses of the Au quantum well and vanishes in the very thin limit. We identify the kink as induced by the coupling between the Au(111) surface state and emergent quantum-well states which probe directly the buried gold-tungsten interface. The signatures of the coupling are further revealed by our time-resolved measurements which show that surface state and quantum-well states thermalize together behaving as dynamically locked electron populations. In particular, relaxation of hot carriers following laser excitation is similar for both surface state and quantum-well states and much slower than expected for a bulk metallic system. The influence of quantum confinement on the interplay between elementary scattering processes of the electrons at the surface and ultrafast carrier transport in the direction perpendicular to the surface is shown to be the reason for the slow electron dynamics.
Physical Review Research
10.1103/PhysRevResearch.2.013343
0031-9007
013343
Sanchez-Barriga, Jaime
208853-8
<a href="https://doi.org/10.25932/publishup-54989">Zweitveröffentlichung in der Schriftenreihe Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1354</a>
false
false
CC-BY - Namensnennung 4.0 International
Andrei Varykhalov
Friedrich Freyse
Irene Aguilera
Marco Battiato
Maxim Krivenkov
Dmitry Marchenko
Gustav Bihlmayer
Stefan Blugel
Oliver Rader
Jaime Sanchez-Barriga
eng
uncontrolled
AG
eng
uncontrolled
Flims
Physik
Institut für Physik und Astronomie
Referiert
Gold Open-Access
60815
2019
2019
eng
1
8
8
2
96
article
Oxford University Press
Oxford
1
2019-12-24
2019-12-24
--
Cell architecture of the giant sulfur bacterium achromatium oxaliferum
Achromatium oxaliferum is a large sulfur bacterium easily recognized by large intracellular calcium carbonate bodies. Although these bodies often fill major parts of the cells' volume, their role and specific intracellular location are unclear. In this study, we used various microscopy and staining techniques to identify the cell compartment harboring the calcium carbonate bodies. We observed that Achromatium cells often lost their calcium carbonate bodies, either naturally or induced by treatments with diluted acids, ethanol, sodium bicarbonate and UV radiation which did not visibly affect the overall shape and motility of the cells (except for UV radiation). The water-soluble fluorescent dye fluorescein easily diffused into empty cavities remaining after calcium carbonate loss. Membranes (stained with Nile Red) formed a network stretching throughout the cell and surrounding empty or filled calcium carbonate cavities. The cytoplasm (stained with FITC and SYBR Green for nucleic acids) appeared highly condensed and showed spots of dissolved Ca2+ (stained with Fura-2). From our observations, we conclude that the calcium carbonate bodies are located in the periplasm, in extra-cytoplasmic pockets of the cytoplasmic membrane and are thus kept separate from the cell's cytoplasm. This periplasmic localization of the carbonate bodies might explain their dynamic formation and release upon environmental changes.
FEMS Microbiology Ecology
Extra-cytoplasmic localization of calcium carbonate bodies
10.1093/femsec/fiz200
1574-6941
fiz200
Schorn, Sina
1501712-6
<a href="https://doi.org/10.25932/publishup-54993">Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1356</a>
false
false
CC-BY - Namensnennung 4.0 International
Sina Schorn
Verena Salman-Carvalho
Sten Littmann
Danny Ionescu
Hans-Peter Grossart
Heribert Cypionka
eng
uncontrolled
sulfur-bacteria
eng
uncontrolled
calcium carbonate inclusions
eng
uncontrolled
extra-cytoplasmic pockets
eng
uncontrolled
calcite
Biowissenschaften; Biologie
Institut für Biochemie und Biologie
Referiert
Hybrid Open-Access
60836
2019
2019
eng
3
7
5
1
48
article
American Institute of Physics
Melville, NY
1
2019-10-16
2019-10-16
--
Stable oxygen and carbon isotopes of carbonates in lake sediments as a paleoflood proxy
Lake sediments are increasingly explored as reliable paleoflood archives. In addition to established flood proxies including detrital layer thickness, chemical composition, and grain size, we explore stable oxygen and carbon isotope data as paleoflood proxies for lakes in catchments with carbonate bedrock geology. In a case study from Lake Mondsee (Austria), we integrate high-resolution sediment trapping at a proximal and a distal location and stable isotope analyses of varved lake sediments to investigate flood-triggered detrital sediment flux. First, we demonstrate a relation between runoff, detrital sediment flux, and isotope values in the sediment trap record covering the period 2011-2013 CE including 22 events with daily (hourly) peak runoff ranging from 10 (24) m(3) s(-1) to 79 (110) m(3) s(-1). The three- to ten-fold lower flood-triggered detrital sediment deposition in the distal trap is well reflected by attenuated peaks in the stable isotope values of trapped sediments. Next, we show that all nine flood-triggered detrital layers deposited in a sediment record from 1988 to 2013 have elevated isotope values compared with endogenic calcite. In addition, even two runoff events that did not cause the deposition of visible detrital layers are distinguished by higher isotope values. Empirical thresholds in the isotope data allow estimation of magnitudes of the majority of floods, although in some cases flood magnitudes are overestimated because local effects can result in too-high isotope values. Hence we present a proof of concept for stable isotopes as reliable tool for reconstructing flood frequency and, although with some limitations, even for flood magnitudes.
Geology / the Geological Society of America
10.1130/G46593.1
1943-2682
0091-7613
1481423-7
<a href="https://doi.org/10.25932/publishup-55000">Zweitveröffentlichung in der Schriftenreihe Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1357</a>
Brauer, Achim
false
false
CC-BY - Namensnennung 4.0 International
Lucas Kämpf
Birgit Plessen
Stefan Lauterbach
Carla Nantke
Hanno Meyer
Bernhard Chapligin
Achim Brauer
eng
uncontrolled
detrital carbonate
eng
uncontrolled
varved sediments
eng
uncontrolled
record
eng
uncontrolled
Baldeggersee
eng
uncontrolled
delta-c-13
eng
uncontrolled
alps
Geowissenschaften
Institut für Geowissenschaften
Referiert
Hybrid Open-Access
63096
2022
2022
deu
618
635
18
11
169
article
C.F. Müller
Heidelberg
1
--
--
--
Der fehlgeschlagene Versuch der qualifizierten Straftat
Goltdammer’s Archiv für Strafrecht
0017-1956
@articleMitsch.2022, author = Mitsch, Wolfgang, year = 2022, title = Der fehlgeschlagene Versuch der qualifizierten Straftat, pages = 618–635, volume = 169, number = 11, issn = 0017-1956, journal = Goltdammer’s Archiv für Strafrecht
md5:41a151a51fe9f5bb881684060e25db3c
2024-03-28T09:52:32+00:00
/tmp/php9MzpzK
bibtex
66053de0130c45.23144647
false
true
Keine öffentliche Lizenz: Unter Urheberrechtsschutz
Wolfgang Mitsch
Recht
Strafrecht
Nicht referiert
63087
2024
2024
eng
4516
4525
10
bookpart
Department of IT Management Shidler College of Business University of Hawaii
Honolulu, HI
1
2024-01-03
2024-01-03
--
Openness indicators for the evaluation of digital platforms between the launch and maturity phase
In recent years, the evaluation of digital platforms has become an important focus in the field of information systems science. The identification of influential indicators that drive changes in digital platforms, specifically those related to openness, is still an unresolved issue. This paper addresses the challenge of identifying measurable indicators and characterizing the transition from launch to maturity in digital platforms. It proposes a systematic analytical approach to identify relevant openness indicators for evaluation purposes. The main contributions of this study are the following (1) the development of a comprehensive procedure for analyzing indicators, (2) the categorization of indicators as evaluation metrics within a multidimensional grid-box model, (3) the selection and evaluation of relevant indicators, (4) the identification and assessment of digital platform architectures during the launch-to-maturity transition, and (5) the evaluation of the applicability of the conceptualization and design process for digital platform evaluation.
Proceedings of the 57th Annual Hawaii International Conference on System Sciences
978-0-99813-317-1
https://hdl.handle.net/10125/106927
@incollectionRojahn.2024, author = Rojahn, Marcel and Gronau, Norbert, title = Openness indicators for the evaluation of digital platforms between the launch and maturity phase, url = https://hdl.handle.net/10125/106927, keywords = federated industrial platform ecosystems, technologies, business models, data-driven artifacts, design-science research, digital platform openness, evaluation, morphological analysis, publisher = Department of IT Management Shidler College of Business University of Hawaii, isbn = 9780998133171, editor = Bui, Tung X., booktitle = Proceedings of the 57th Annual Hawaii International Conference on System Sciences, year = 2024, address = Honolulu, HI
md5:8ac518e7138e0ae119bfec0c2718984a
2024-03-28T08:08:38+00:00
/tmp/phpZlnpr9
bibtex
66052586d27a11.92990280
false
true
CC-BY-NC-ND - Namensnennung, nicht kommerziell, keine Bearbeitungen 4.0 International
Marcel Rojahn
Norbert Gronau
eng
uncontrolled
federated industrial platform ecosystems
eng
uncontrolled
technologies
eng
uncontrolled
business models
eng
uncontrolled
data-driven artifacts
eng
uncontrolled
design-science research
eng
uncontrolled
digital platform openness
eng
uncontrolled
evaluation
eng
uncontrolled
morphological analysis
Datenverarbeitung; Informatik
Wirtschaft
Open Access
Nicht ermittelbar
Fachgruppe Betriebswirtschaftslehre
63084
2021
2021
eng
5728
5741
14
10
11
article
Wiley
Hoboken
1
2021-03-29
2021-03-29
--
Movement can mediate temporal mismatches between resource availability and biological events in host-pathogen interactions
Global change is shifting the timing of biological events, leading to temporal mismatches between biological events and resource availability. These temporal mismatches can threaten species' populations. Importantly, temporal mismatches not only exert strong pressures on the population dynamics of the focal species, but can also lead to substantial changes in pairwise species interactions such as host-pathogen systems. We adapted an established individual-based model of host-pathogen dynamics. The model describes a viral agent in a social host, while accounting for the host's explicit movement decisions. We aimed to investigate how temporal mismatches between seasonal resource availability and host life-history events affect host-pathogen coexistence, that is, disease persistence. Seasonal resource fluctuations only increased coexistence probability when in synchrony with the hosts' biological events. However, a temporal mismatch reduced host-pathogen coexistence, but only marginally. In tandem with an increasing temporal mismatch, our model showed a shift in the spatial distribution of infected hosts. It shifted from an even distribution under synchronous conditions toward the formation of disease hotspots, when host life history and resource availability mismatched completely. The spatial restriction of infected hosts to small hotspots in the landscape initially suggested a lower coexistence probability due to the critical loss of susceptible host individuals within those hotspots. However, the surrounding landscape facilitated demographic rescue through habitat-dependent movement. Our work demonstrates that the negative effects of temporal mismatches between host resource availability and host life history on host-pathogen coexistence can be reduced through the formation of temporary disease hotspots and host movement decisions, with implications for disease management under disturbances and global change.
Ecology and evolution
10.1002/ece3.7478
34026043
2045-7758
outputup:dataSource:PubMed:2021
WOS:000634528000001
Kürschner, Tobias (corresponding author), Leibniz Inst Zoo & Wildlife Res, Dept Ecol Dynam, Berlin, Germany., tobias.kuerschner@googlemail.com
Deutsche Forschungsgemeinschaft, German Research Foundation (DFG) [DFG-GRK 2118/1]
Kürschner, Tobias
2024-03-28T07:31:26+00:00
sword
importub
filename=package.tar
115a0d7ed61f73533c16379ff862cce2
false
true
CC-BY - Namensnennung 4.0 International
Tobias Kürschner
Cédric Scherer
Viktoriia Radchuk
Niels Blaum
Stephanie Kramer-Schadt
eng
uncontrolled
classical swine fever
eng
uncontrolled
dynamic landscapes
eng
uncontrolled
global change
eng
uncontrolled
host– pathogen dynamics
eng
uncontrolled
individual‐ based model
eng
uncontrolled
movement ecology
Naturwissenschaften und Mathematik
Biowissenschaften; Biologie
Institut für Biochemie und Biologie
Referiert
Import
Gold Open-Access
DOAJ gelistet
63083
2021
2021
eng
268
289
22
2
42
article
Routledge, Taylor & Francis Group
Abingdon
1
2021-05-02
2021-05-02
--
Peer assessment in MOOCs
We report on a systematic review of the landscape of peer assessment in massive open online courses (MOOCs) with papers from 2014 to 2020 in 20 leading education technology publication venues across four databases containing education technology-related papers, addressing three research issues: the evolution of peer assessment in MOOCs during the period 2014 to 2020, the methods used in MOOCs to assess peers, and the challenges of and future directions in MOOC peer assessment. We provide summary statistics and a review of methods across the corpus and highlight three directions for improving the use of peer assessment in MOOCs: the need for focusing on scaling learning through peer evaluations, the need for scaling and optimizing team submissions in team peer assessments, and the need for embedding a social process for peer assessment.
Distance education
Systematic literature review
10.1080/01587919.2021.1911626
0158-7919
1475-0198
outputup:dataSource:WoS:2021
WOS:000646480800001
Gamage, Dilrukshi (corresponding author), Univ Moratuwa, Dept Comp Sci & Engn, Fac Engn, Katubedda, Sri Lanka., dilrukshi.gamage@gmail.com
Gamage, Dilrukshi
2024-03-28T07:09:23+00:00
sword
importub
filename=package.tar
ade1e58a46d88d0ef7d6989998b6f82a
false
true
Dilrukshi Gamage
Thomas Staubitz
Mark Whiting
eng
uncontrolled
MOOC
eng
uncontrolled
peer assessment
eng
uncontrolled
peer evaluation
eng
uncontrolled
peer review
eng
uncontrolled
literature review
eng
uncontrolled
social interaction
Bildung und Erziehung
Referiert
Hasso-Plattner-Institut für Digital Engineering GmbH
Import
63086
2022
2021
eng
9
429
article
Elsevier
Amsterdam
1
2021-10-23
2021-10-23
--
Phase reconstruction from oscillatory data with iterated Hilbert transform embeddings
In the data analysis of oscillatory systems, methods based on phase reconstruction are widely used to characterize phase-locking properties and inferring the phase dynamics. The main component in these studies is an extraction of the phase from a time series of an oscillating scalar observable. We discuss a practical procedure of phase reconstruction by virtue of a recently proposed method termed iterated Hilbert transform embeddings. We exemplify the potential benefits and limitations of the approach by applying it to a generic observable of a forced Stuart-Landau oscillator. Although in many cases, unavoidable amplitude modulation of the observed signal does not allow for perfect phase reconstruction, in cases of strong stability of oscillations and a high frequency of the forcing, iterated Hilbert transform embeddings significantly improve the quality of the reconstructed phase. We also demonstrate that for significant amplitude modulation, iterated embeddings do not provide any improvement.
Physica : D, Nonlinear phenomena
benefits and limitations
10.1016/j.physd.2021.133070
0167-2789
1872-8022
outputup:dataSource:WoS:2022
133070
WOS:000719301100002
Pikovskij, Arkadij (corresponding author), Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., egengel@uni-potsdam.de; pikovsky@uni-potsdam.de
Friedrich-Ebert Stiftung; Potsdam Graduate School; Russian Science FoundationRussian Science Foundation (RSF) [17-12-01534]; Russian Ministry of Science and Higher Education [075-15-2019-1931]
Pikovskij, Arkadij
2024-03-28T07:53:40+00:00
sword
importub
filename=package.tar
549ae8be9e109051156bf6a10f030e8b
false
true
Erik Gengel
Arkadij Pikovskij
eng
uncontrolled
Data analysis
eng
uncontrolled
Phase reconstruction
eng
uncontrolled
Hilbert transform
Physik
Institut für Physik und Astronomie
Referiert
Import
63051
2022
2022
eng
17
7
12
article
Wiley
Hoboken
1
2022-07-11
2022-07-11
--
Large-scale PVA modeling of insects in cultivated grasslands
In many species, dispersal is decisive for survival in a changing climate. Simulation models for population dynamics under climate change thus need to account for this factor. Moreover, large numbers of species inhabiting agricultural landscapes are subject to disturbances induced by human land use. We included dispersal in the HiLEG model that we previously developed to study the interaction between climate change and agricultural land use in single populations. Here, the model was parameterized for the large marsh grasshopper (LMG) in cultivated grasslands of North Germany to analyze (1) the species development and dispersal success depending on the severity of climate change in subregions, (2) the additional effect of grassland cover on dispersal success, and (3) the role of dispersal in compensating for detrimental grassland mowing. Our model simulated population dynamics in 60-year periods (2020-2079) on a fine temporal (daily) and high spatial (250 x 250 m(2)) scale in 107 subregions, altogether encompassing a range of different grassland cover, climate change projections, and mowing schedules. We show that climate change alone would allow the LMG to thrive and expand, while grassland cover played a minor role. Some mowing schedules that were harmful to the LMG nevertheless allowed the species to moderately expand its range. Especially under minor climate change, in many subregions dispersal allowed for mowing early in the year, which is economically beneficial for farmers. More severe climate change could facilitate LMG expansion to uninhabited regions but would require suitable mowing schedules along the path. These insights can be transferred to other species, given that the LMG is considered a representative of grassland communities. For more specific predictions on the dynamics of other species affected by climate change and land use, the publicly available HiLEG model can be easily adapted to the characteristics of their life cycle.
Ecology and evolution
the role of dispersal in mitigating the effects of management schedules under climate change
10.1002/ece3.9063
35845365
2045-7758
outputup:dataSource:WoS:2022
e9063
WOS:000825792900001
Leins, Johannes A. (corresponding author), UFZ Helmholtz Ctr Environm Res, Dept Ecol Modelling, Permoserstr 15, D-04318 Leipzig, Germany., johannes.leins@ufz.de
German Federal Ministry of Education and Research [01LA1803B]
Leins, Johannes A.
2024-03-25T13:34:57+00:00
sword
importub
filename=package.tar
68e238e06bd7bf4280d3eabe98a794f4
false
true
CC-BY - Namensnennung 4.0 International
Johannes A. Leins
Volker Grimm
Martin Drechsler
eng
uncontrolled
bilinear interpolation
eng
uncontrolled
climate change
eng
uncontrolled
dispersal success
eng
uncontrolled
land use
eng
uncontrolled
large marsh grasshopper
eng
uncontrolled
spatially explicit model
Naturwissenschaften und Mathematik
Biowissenschaften; Biologie
Institut für Biochemie und Biologie
Referiert
Import
Gold Open-Access
DOAJ gelistet