TY - JOUR A1 - Allan, Eric A1 - Bossdorf, Oliver A1 - Dormann, Carsten F. A1 - Prati, Daniel A1 - Gossner, Martin M. A1 - Tscharntke, Teja A1 - Blüthgen, Nico A1 - Bellach, Michaela A1 - Birkhofer, Klaus A1 - Boch, Steffen A1 - Böhm, Stefan A1 - Börschig, Carmen A1 - Chatzinotas, Antonis A1 - Christ, Sabina A1 - Daniel, Rolf A1 - Diekötter, Tim A1 - Fischer, Christiane A1 - Friedl, Thomas A1 - Glaser, Karin A1 - Hallmann, Christine A1 - Hodac, Ladislav A1 - Hölzel, Norbert A1 - Jung, Kirsten A1 - Klein, Alexandra Maria A1 - Klaus, Valentin H. A1 - Kleinebecker, Till A1 - Krauss, Jochen A1 - Lange, Markus A1 - Morris, E. Kathryn A1 - Müller, Jörg A1 - Nacke, Heiko A1 - Pasalic, Esther A1 - Rillig, Matthias C. A1 - Rothenwoehrer, Christoph A1 - Schally, Peter A1 - Scherber, Christoph A1 - Schulze, Waltraud X. A1 - Socher, Stephanie A. A1 - Steckel, Juliane A1 - Steffan-Dewenter, Ingolf A1 - Türke, Manfred A1 - Weiner, Christiane N. A1 - Werner, Michael A1 - Westphal, Catrin A1 - Wolters, Volkmar A1 - Wubet, Tesfaye A1 - Gockel, Sonja A1 - Gorke, Martin A1 - Hemp, Andreas A1 - Renner, Swen C. A1 - Schöning, Ingo A1 - Pfeiffer, Simone A1 - König-Ries, Birgitta A1 - Buscot, Francois A1 - Linsenmair, Karl Eduard A1 - Schulze, Ernst-Detlef A1 - Weisser, Wolfgang W. A1 - Fischer, Markus T1 - Interannual variation in land-use intensity enhances grassland multidiversity JF - Proceedings of the National Academy of Sciences of the United States of America N2 - Although temporal heterogeneity is a well-accepted driver of biodiversity, effects of interannual variation in land-use intensity (LUI) have not been addressed yet. Additionally, responses to land use can differ greatly among different organisms; therefore, overall effects of land-use on total local biodiversity are hardly known. To test for effects of LUI (quantified as the combined intensity of fertilization, grazing, and mowing) and interannual variation in LUI (SD in LUI across time), we introduce a unique measure of whole-ecosystem biodiversity, multidiversity. This synthesizes individual diversity measures across up to 49 taxonomic groups of plants, animals, fungi, and bacteria from 150 grasslands. Multidiversity declined with increasing LUI among grasslands, particularly for rarer species and aboveground organisms, whereas common species and belowground groups were less sensitive. However, a high level of interannual variation in LUI increased overall multidiversity at low LUI and was even more beneficial for rarer species because it slowed the rate at which the multidiversity of rare species declined with increasing LUI. In more intensively managed grasslands, the diversity of rarer species was, on average, 18% of the maximum diversity across all grasslands when LUI was static over time but increased to 31% of the maximum when LUI changed maximally over time. In addition to decreasing overall LUI, we suggest varying LUI across years as a complementary strategy to promote biodiversity conservation. KW - biodiversity loss KW - agricultural grasslands KW - Biodiversity Exploratories Y1 - 2014 U6 - https://doi.org/10.1073/pnas.1312213111 SN - 0027-8424 VL - 111 IS - 1 SP - 308 EP - 313 PB - National Acad. of Sciences CY - Washington ER - TY - JOUR A1 - Birkhofer, Klaus A1 - Schöning, Ingo A1 - Alt, Fabian A1 - Herold, Nadine A1 - Klarner, Bernhard A1 - Maraun, Mark A1 - Marhan, Sven A1 - Oelmann, Yvonne A1 - Wubet, Tesfaye A1 - Yurkov, Andrey A1 - Begerow, Dominik A1 - Berner, Doreen A1 - Buscot, Francois A1 - Daniel, Rolf A1 - Diekötter, Tim A1 - Ehnes, Roswitha B. A1 - Erdmann, Georgia A1 - Fischer, Christiane A1 - Fösel, Baerbel A1 - Groh, Janine A1 - Gutknecht, Jessica A1 - Kandeler, Ellen A1 - Lang, Christa A1 - Lohaus, Gertrud A1 - Meyer, Annabel A1 - Nacke, Heiko A1 - Näther, Astrid A1 - Overmann, Jörg A1 - Polle, Andrea A1 - Pollierer, Melanie M. A1 - Scheu, Stefan A1 - Schloter, Michael A1 - Schulze, Ernst-Detlef A1 - Schulze, Waltraud X. A1 - Weinert, Jan A1 - Weisser, Wolfgang W. A1 - Wolters, Volkmar A1 - Schrumpf, Marion T1 - General relationships between abiotic soil properties and soil biota across spatial scales and different land-use types JF - PLoS one N2 - Very few principles have been unraveled that explain the relationship between soil properties and soil biota across large spatial scales and different land-use types. Here, we seek these general relationships using data from 52 differently managed grassland and forest soils in three study regions spanning a latitudinal gradient in Germany. We hypothesize that, after extraction of variation that is explained by location and land-use type, soil properties still explain significant proportions of variation in the abundance and diversity of soil biota. If the relationships between predictors and soil organisms were analyzed individually for each predictor group, soil properties explained the highest amount of variation in soil biota abundance and diversity, followed by land-use type and sampling location. After extraction of variation that originated from location or land-use, abiotic soil properties explained significant amounts of variation in fungal, meso-and macrofauna, but not in yeast or bacterial biomass or diversity. Nitrate or nitrogen concentration and fungal biomass were positively related, but nitrate concentration was negatively related to the abundances of Collembola and mites and to the myriapod species richness across a range of forest and grassland soils. The species richness of earthworms was positively correlated with clay content of soils independent of sample location and land-use type. Our study indicates that after accounting for heterogeneity resulting from large scale differences among sampling locations and land-use types, soil properties still explain significant proportions of variation in fungal and soil fauna abundance or diversity. However, soil biota was also related to processes that act at larger spatial scales and bacteria or soil yeasts only showed weak relationships to soil properties. We therefore argue that more general relationships between soil properties and soil biota can only be derived from future studies that consider larger spatial scales and different land-use types. Y1 - 2012 U6 - https://doi.org/10.1371/journal.pone.0043292 SN - 1932-6203 VL - 7 IS - 8 PB - PLoS CY - San Fransisco ER - TY - JOUR A1 - Wolff, Christian Michael A1 - Frischmann, Peter D. A1 - Schulze, Marcus A1 - Bohn, Bernhard J. A1 - Wein, Robin A1 - Livadas, Panajotis A1 - Carlson, Michael T. A1 - Jäckel, Frank A1 - Feldmann, Jochen A1 - Würthner, Frank A1 - Stolarczyk, Jacek K. T1 - All-in-one visible-light-driven water splitting by combining nanoparticulate and molecular co-catalysts on CdS nanorods JF - Nature Energy N2 - Full water splitting into hydrogen and oxygen on semiconductor nanocrystals is a challenging task; overpotentials must be overcome for both half-reactions and different catalytic sites are needed to facilitate them. Additionally, efficient charge separation and prevention of back reactions are necessary. Here, we report simultaneous H-2 and O-2 evolution by CdS nanorods decorated with nanoparticulate reduction and molecular oxidation co-catalysts. The process proceeds entirely without sacrificial agents and relies on the nanorod morphology of CdS to spatially separate the reduction and oxidation sites. Hydrogen is generated on Pt nanoparticles grown at the nanorod tips, while Ru(tpy)(bpy)Cl-2-based oxidation catalysts are anchored through dithiocarbamate bonds onto the sides of the nanorod. O-2 generation from water was verified by O-18 isotope labelling experiments, and time-resolved spectroscopic results confirmed efficient charge separation and ultrafast electron and hole transfer to the reaction sites. The system demonstrates that combining nanoparticulate and molecular catalysts on anisotropic nanocrystals provides an effective pathway for visible-light-driven photocatalytic water splitting. Y1 - 2018 U6 - https://doi.org/10.1038/s41560-018-0229-6 SN - 2058-7546 VL - 3 IS - 10 SP - 862 EP - 869 PB - Nature Publ. Group CY - London ER - TY - JOUR A1 - Keller, Johannes A1 - Catala-Lehnen, Philip A1 - Huebner, Antje K. A1 - Jeschke, Anke A1 - Heckt, Timo A1 - Lueth, Anja A1 - Krause, Matthias A1 - Koehne, Till A1 - Albers, Joachim A1 - Schulze, Jochen A1 - Schilling, Sarah A1 - Haberland, Michael A1 - Denninger, Hannah A1 - Neven, Mona A1 - Hermans-Borgmeyer, Irm A1 - Streichert, Thomas A1 - Breer, Stefan A1 - Barvencik, Florian A1 - Levkau, Bodo A1 - Rathkolb, Birgit A1 - Wolf, Eckhard A1 - Calzada-Wack, Julia A1 - Neff, Frauke A1 - Gailus-Durner, Valerie A1 - Fuchs, Helmut A1 - de Angelis, Martin Hrabe A1 - Klutmann, Susanne A1 - Tsourdi, Elena A1 - Hofbauer, Lorenz C. A1 - Kleuser, Burkhard A1 - Chun, Jerold A1 - Schinke, Thorsten A1 - Amling, Michael T1 - Calcitonin controls bone formation by inhibiting the release of sphingosine 1-phosphate from osteoclasts JF - Nature Communications N2 - The hormone calcitonin (CT) is primarily known for its pharmacologic action as an inhibitor of bone resorption, yet CT-deficient mice display increased bone formation. These findings raised the question about the underlying cellular and molecular mechanism of CT action. Here we show that either ubiquitous or osteoclast-specific inactivation of the murine CT receptor (CTR) causes increased bone formation. CT negatively regulates the osteoclast expression of Spns2 gene, which encodes a transporter for the signalling lipid sphingosine 1-phosphate (S1P). CTR-deficient mice show increased S1P levels, and their skeletal phenotype is normalized by deletion of the S1P receptor S1P(3). Finally, pharmacologic treatment with the nonselective S1P receptor agonist FTY720 causes increased bone formation in wild-type, but not in S1P(3)-deficient mice. This study redefines the role of CT in skeletal biology, confirms that S1P acts as an osteoanabolic molecule in vivo and provides evidence for a pharmacologically exploitable crosstalk between osteoclasts and osteoblasts. Y1 - 2014 U6 - https://doi.org/10.1038/ncomms6215 SN - 2041-1723 VL - 5 PB - Nature Publ. Group CY - London ER - TY - GEN A1 - Mühlenbruch, Kristin A1 - Kuxhaus, Olga A1 - Pencina, Michael J. A1 - Boeing, Heiner A1 - Liero, Hannelore A1 - Schulze, Matthias Bernd T1 - A confidence ellipse for the Net Reclassification Improvement T2 - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe N2 - The Net Reclassification Improvement (NRI) has become a popular metric for evaluating improvement in disease prediction models through the past years. The concept is relatively straightforward but usage and interpretation has been different across studies. While no thresholds exist for evaluating the degree of improvement, many studies have relied solely on the significance of the NRI estimate. However, recent studies recommend that statistical testing with the NRI should be avoided. We propose using confidence ellipses around the estimated values of event and non-event NRIs which might provide the best measure of variability around the point estimates. Our developments are illustrated using practical examples from EPIC-Potsdam study. KW - risk assessment KW - risk model KW - model comparison KW - reclassification KW - confidence intervals Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-427371 SN - 1866-8372 IS - 825 SP - 299 EP - 304 ER - TY - BOOK A1 - Schulze, Bert-Wolfgang A1 - Demuth, Michael A1 - Albeverio, Sergio A1 - Schrohe, Elmar T1 - Advances in Partial differential equations Y1 - 2001 PB - Birkhäuser CY - Basel ER - TY - BOOK A1 - Albeverio, Sergio A1 - Demuth, Michael A1 - Schrohe, Elmar A1 - Schulze, Bert-Wolfgang T1 - Parabolicity, volterra calculus, and conical singularities : a volume of advances in partial differential equations T3 - Operator theory : advances and applications Y1 - 2002 SN - 3-7643-6906-x VL - 138 PB - Birkhäuser Verl. CY - Basel ER - TY - JOUR A1 - Allan, Eric A1 - Weisser, Wolfgang W. A1 - Fischer, Markus A1 - Schulze, Ernst-Detlef A1 - Weigelt, Alexandra A1 - Roscher, Christiane A1 - Baade, Jussi A1 - Barnard, Romain L. A1 - Bessler, Holger A1 - Buchmann, Nina A1 - Ebeling, Anne A1 - Eisenhauer, Nico A1 - Engels, Christof A1 - Fergus, Alexander J. F. A1 - Gleixner, Gerd A1 - Gubsch, Marlen A1 - Halle, Stefan A1 - Klein, Alexandra Maria A1 - Kertscher, Ilona A1 - Kuu, Annely A1 - Lange, Markus A1 - Le Roux, Xavier A1 - Meyer, Sebastian T. A1 - Migunova, Varvara D. A1 - Milcu, Alexandru A1 - Niklaus, Pascal A. A1 - Oelmann, Yvonne A1 - Pasalic, Esther A1 - Petermann, Jana S. A1 - Poly, Franck A1 - Rottstock, Tanja A1 - Sabais, Alexander C. W. A1 - Scherber, Christoph A1 - Scherer-Lorenzen, Michael A1 - Scheu, Stefan A1 - Steinbeiss, Sibylle A1 - Schwichtenberg, Guido A1 - Temperton, Vicky A1 - Tscharntke, Teja A1 - Voigt, Winfried A1 - Wilcke, Wolfgang A1 - Wirth, Christian A1 - Schmid, Bernhard T1 - A comparison of the strength of biodiversity effects across multiple functions JF - Oecologia N2 - In order to predict which ecosystem functions are most at risk from biodiversity loss, meta-analyses have generalised results from biodiversity experiments over different sites and ecosystem types. In contrast, comparing the strength of biodiversity effects across a large number of ecosystem processes measured in a single experiment permits more direct comparisons. Here, we present an analysis of 418 separate measures of 38 ecosystem processes. Overall, 45 % of processes were significantly affected by plant species richness, suggesting that, while diversity affects a large number of processes not all respond to biodiversity. We therefore compared the strength of plant diversity effects between different categories of ecosystem processes, grouping processes according to the year of measurement, their biogeochemical cycle, trophic level and compartment (above- or belowground) and according to whether they were measures of biodiversity or other ecosystem processes, biotic or abiotic and static or dynamic. Overall, and for several individual processes, we found that biodiversity effects became stronger over time. Measures of the carbon cycle were also affected more strongly by plant species richness than were the measures associated with the nitrogen cycle. Further, we found greater plant species richness effects on measures of biodiversity than on other processes. The differential effects of plant diversity on the various types of ecosystem processes indicate that future research and political effort should shift from a general debate about whether biodiversity loss impairs ecosystem functions to focussing on the specific functions of interest and ways to preserve them individually or in combination. KW - Bottom-up effects KW - Carbon cycling KW - Ecological synthesis KW - Ecosystem processes KW - Grasslands KW - Jena experiment KW - Nitrogen cycling Y1 - 2013 U6 - https://doi.org/10.1007/s00442-012-2589-0 SN - 0029-8549 VL - 173 IS - 1 SP - 223 EP - 237 PB - Springer CY - New York ER - TY - JOUR A1 - Bauer, Klaus A1 - Moeck, Inga A1 - Norden, Ben A1 - Schulze, Alexander A1 - Weber, Michael H. A1 - Wirth, Holger T1 - Tomographic P wave velocity and vertical velocity gradient structure across the geothermal site Groß Schoenebeck (NE German Basin) : relationship to lithology, salt tectonics, and thermal regime N2 - Seismic wide-angle data were collected along a 40-km-long profile centered at the geothermal research well GrSk 3/90 in the Northeast German Basin. Tomographic inversion of travel time data provided a velocity and a vertical velocity gradient model, indicative of Cenozoic to Pre-Permian sediments. Wide-angle reflections are modeled and interpreted as top Zechstein and top Pre-Permian. Changes in velocity gradients are interpreted as the transition from mechanical to chemical compaction at 2-3 km depth, and localized salt structures are imaged, suggesting a previously unknown salt pillow in the southern part of the seismic profile. The Zechstein salt shows decreased velocities in the adjacent salt pillows compared to the salt lows, which is confirmed by sonic log data. This decrease in velocity could be explained by the mobilization of less dense salt, which moved and formed the salt pillows, whereas the denser salt remained in place at the salt lows. We interpret a narrow subvertical low-velocity zone under the salt pillow at GrSk 3/ 90 as a fault in the deep Permian to Pre-Permian. This WNW-ESE trending fault influenced the location of the salt tectonics and led to the formation of a fault-bounded graben in the Rotliegend sandstones with optimal mechanical conditions for geothermal production. Thermal modeling showed that salt pillows are related to chimney effects, a decrease in temperature, and increasing velocity. The assumed variations in salt lithology, density, and strain must thus be even higher to compensate for the temperature effect. Y1 - 2010 UR - http://www.agu.org/journals/jb/ U6 - https://doi.org/10.1029/2009jb006895 SN - 0148-0227 ER - TY - JOUR A1 - Weber, Michael H. A1 - Helwig, S. L. A1 - Bauer, Klaus A1 - Haberland, Christian A1 - Koch, Olaf A1 - Ryberg, T. A1 - Maercklin, N. A1 - Ritter, O. A1 - Schulze, A. T1 - Near-surface properties of an active fault derived by joint interpretation of different geophysical methods - the Arava/Araba Fault in the Middle East JF - Near surface geophysics N2 - The motion of tectonic plates is accommodated at fault zones. One of the unanswered questions about fault zones relates to the role they play in controlling shallow and local hydrology. This study focuses on the Arava/Araba Fault (AF) zone, the southern portion of the Dead Sea Transform (DST) in the Middle East. We combine seismic and electromagnetic methods (EM) to image the geometry and map the petro-physical properties and water occurrence in the top 100 m of this active fault. For three profiles, P-velocity and resistivity images were derived independently. Using a neural network cluster analysis three classes with similar P-velocity and resistivities could then be determined from these images. These classes correspond to spatial domains of specific material and wetness. The first class occurs primarily east of the fault consisting of 'wet' sand (dunes) and brecciated sediments, whereas the second class composed of similar material located west of the fault is 'dry'. The third class lies at depth below ca. 50 m and is composed of highly deformed and weathered Precambrian rocks that constitute the multi-branch fault zone of the AF at this location. The combination of two independent measurements like seismics and EM linked by a stringent mathematical approach has thus shown the potential to delineate the interplay of lithology and water near active faults. Y1 - 2012 U6 - https://doi.org/10.3997/1873-0604.2012031 SN - 1569-4445 VL - 10 IS - 5 SP - 381 EP - 390 PB - European Association of Geoscientists & Engineers CY - Houten ER - TY - JOUR A1 - Meyer, Sebastian T. A1 - Ebeling, Anne A1 - Eisenhauer, Nico A1 - Hertzog, Lionel A1 - Hillebrand, Helmut A1 - Milcu, Alexandru A1 - Pompe, Sven A1 - Abbas, Maike A1 - Bessler, Holger A1 - Buchmann, Nina A1 - De Luca, Enrica A1 - Engels, Christof A1 - Fischer, Markus A1 - Gleixner, Gerd A1 - Hudewenz, Anika A1 - Klein, Alexandra-Maria A1 - de Kroon, Hans A1 - Leimer, Sophia A1 - Loranger, Hannah A1 - Mommer, Liesje A1 - Oelmann, Yvonne A1 - Ravenek, Janneke M. A1 - Roscher, Christiane A1 - Rottstock, Tanja A1 - Scherber, Christoph A1 - Scherer-Lorenzen, Michael A1 - Scheu, Stefan A1 - Schmid, Bernhard A1 - Schulze, Ernst-Detlef A1 - Staudler, Andrea A1 - Strecker, Tanja A1 - Temperton, Vicky A1 - Tscharntke, Teja A1 - Vogel, Anja A1 - Voigt, Winfried A1 - Weigelt, Alexandra A1 - Wilcke, Wolfgang A1 - Weisser, Wolfgang W. T1 - Effects of biodiversity strengthen over time as ecosystem functioning declines at low and increases at high biodiversity JF - Ecosphere : the magazine of the International Ecology University KW - biodiversity ecosystem functioning (BEF) KW - ecosystem processes KW - grassland KW - mechanism KW - plant productivity KW - plant species richness KW - temporal effects KW - trophic interactions Y1 - 2016 U6 - https://doi.org/10.1002/ecs2.1619 SN - 2150-8925 VL - 7 PB - Wiley-Blackwell CY - Hoboken ER - TY - CHAP A1 - Froitzheim, Manuel A1 - Bergner, Nadine A1 - Schroeder, Ulrik A1 - Hurtienne, Dominik A1 - Spannagel, Christian A1 - Roderus, Simon A1 - Wienkop, Uwe A1 - Leonhardt, Thiemo A1 - Kwiecien, Alexandra A1 - Schmetz, Arno A1 - Bellgardt, Martin A1 - Naumann, Uwe A1 - Weßels, Doris A1 - Metzger, Christiane A1 - Längrich, Matthias A1 - Schulze, Jörg A1 - Jakoblew, Marcel A1 - Keil, Reinhard A1 - Winkelnkemper, Felix A1 - Engbring, Dieter A1 - Klar, Tilman-Mathies A1 - Kujath, Bertold A1 - Schütze, Christopher A1 - Fietkau, Julian A1 - Kindsmüller, Martin Christof A1 - Göttel, Timo A1 - Bergner, Nadine A1 - Taraschewski, Christian A1 - Vosseberg, Karin A1 - Czernik, Sofie A1 - Erb, Ulrike A1 - Vielhaber, Michael A1 - Schlierkamp, Kathrin A1 - Thurner, Veronika A1 - Bröker, Kathrin ED - Forbrig, Peter ED - Magenheim, Johannes T1 - HDI 2014 – Gestalten von Übergängen BT - 6. Fachtagung Hochschuldidaktik der Informatik ; 15.-16. September 2014, Universität Freiburg N2 - Die Tagung HDI 2014 in Freiburg zur Hochschuldidaktik der Informatik HDI wurde erneut vom Fachbereich Informatik und Ausbildung / Didaktik der Informatik (IAD) in der Gesellschaft für Informatik e. V. (GI) organisiert. Sie dient den Lehrenden der Informatik in Studiengängen an Hochschulen als Forum der Information und des Austauschs über neue didaktische Ansätze und bildungspolitische Themen im Bereich der Hochschulausbildung aus der fachlichen Perspektive der Informatik. Die HDI 2014 ist nun bereits die sechste Ausgabe der HDI. Für sie wurde das spezielle Motto „Gestalten und Meistern von Übergängen“ gewählt. Damit soll ein besonderes Augenmerk auf die Übergänge von Schule zum Studium, vom Bachelor zum Master, vom Studium zur Promotion oder vom Studium zur Arbeitswelt gelegt werden. T3 - Commentarii informaticae didacticae (CID) - 9 Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-74920 SN - 978-3-86956-313-8 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Mühlenbruch, Kristin A1 - Kuxhaus, Olga A1 - Pencina, Michael J. A1 - Boeing, Heiner A1 - Liero, Hannelore A1 - Schulze, Matthias Bernd T1 - A confidence ellipse for the Net Reclassification Improvement JF - European journal of epidemiology N2 - The Net Reclassification Improvement (NRI) has become a popular metric for evaluating improvement in disease prediction models through the past years. The concept is relatively straightforward but usage and interpretation has been different across studies. While no thresholds exist for evaluating the degree of improvement, many studies have relied solely on the significance of the NRI estimate. However, recent studies recommend that statistical testing with the NRI should be avoided. We propose using confidence ellipses around the estimated values of event and non-event NRIs which might provide the best measure of variability around the point estimates. Our developments are illustrated using practical examples from EPIC-Potsdam study. KW - Risk assessment KW - Risk model KW - Model comparison KW - Reclassification KW - Confidence intervals Y1 - 2015 U6 - https://doi.org/10.1007/s10654-015-0001-1 SN - 0393-2990 SN - 1573-7284 VL - 30 IS - 4 SP - 299 EP - 304 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Oncken, Onno A1 - Luschen, Ewald A1 - Mechie, James A1 - Sobolev, Stephan Vladimir A1 - Schulze, Albrecht A1 - Gaedicke, Christoph A1 - Grunewald, Steffen A1 - Bribach, Jens A1 - Asch, Günter A1 - Giese, Peter A1 - Wigger, Peter A1 - Schmitz, Michael A1 - Lueth, Stefan A1 - Scheuber, Ekkehard A1 - Haberland, Christian A1 - Rietbrock, Andreas A1 - Götze, Hans-Jürgen A1 - Brasse, Heinrich A1 - Patzwahl, Regina A1 - Chong, Guillermo A1 - Wilke, Hans-Gerhard A1 - Gonzalez, Gabriel A1 - Jensen, Arturo A1 - Araneda, Manuel A1 - Vieytes, Hugo A1 - Behn, Gerardo A1 - Martinez, Eloy T1 - Seismic reflection image revealing offset of Andean subduction-zone earthquake locations into oceanic mantle Y1 - 1999 ER - TY - JOUR A1 - Seitz, Birgit A1 - Ristow, Michael A1 - Klemm, Gunther A1 - Rätzel, Stefan A1 - Schulze, Gerhart A1 - Hoffmann, Maik T1 - Zur Verbreitung der Wildrosen und verwilderten Kulturrosen in Berlin und Brandenburg Y1 - 2004 SN - 0724-3111 - ER - TY - JOUR A1 - Weber, Michael H. A1 - Zetsche, F. A1 - Ryberg, Trond A1 - Schulze, A. A1 - Spangenberg, Erik A1 - Huenges, Ernst T1 - Seismic detection limits of small, deep, man-made reflectors : a test at a geothermal site in northern Germany N2 - A key question for the development of geothermal plants is the seismic detection and monitoring of fluid injections at several kilometers depth. The detection and monitoring limits are controlled by several parameters, for example, the strength of seismic sources, number of receivers, vertical stacking, and noise conditions. For a known reference reflector at 2.66 km depth at a geothermal site in northern Germany the results of a simple surface seismic experiment were therefore combined with numerical forward modeling for different injection scenarios at 3.8 km depth. The underlying idea is that changes of reflectivity from the injection at 3.8 km must be larger than the variance of the measurements to be observable. Assuming that the injection at 3.8 km depth would produce a subhorizontal disklike target with a fracture porosity of 2% or 5% (the critical porosity) the water injection volume has to be at least 443 and 115 m(3), respectively, to be detectable from the surface. If the injection on the other hand does not create subhorizontal but subvertical pathways or only reduces the seismic velocities via the increased pore pressure in the immediate vicinity of the bore hole, the injection is undetectable from the surface. The most promising approach is therefore to move sources and/or receivers closer to the target, that is, the use of borehole instrumentation Y1 - 2005 SN - 0037-1106 ER - TY - JOUR A1 - Bauer, M. A1 - Banaschewski, Tobias A1 - Heinz, A. A1 - Kamp-Becker, I. A1 - Meyer-Lindenberg, A. A1 - Padberg, F. A1 - Rapp, Michael Armin A1 - Rupprecht, R. A1 - Schneider, F. A1 - Schulze, T. G. A1 - Wittchen, Hans-Ulrich T1 - The German Research Network for mental Disorders JF - Der Nervenarzt : Organ der Deutschen Gesellschaft für Psychiatrie, Psychotherapie und Nervenheilkunde ; Mitteilungsblatt der Deutschen Gesellschaft für Neurologie N2 - Mental disorders are among the greatest medical and social challenges facing us. They can occur at all stages of life and are among the most important commonly occurring diseases. In Germany 28 % of the population suffer from a mental disorder every year, while the lifetime risk of suffering from a mental disorder is almost 50 %. Mental disorders cause great suffering for those affected and their social network. Quantitatively speaking, they can be considered to be among those diseases creating the greatest burden for society due to reduced productivity, absence from work and premature retirement. The Federal Ministry of Education and Research is funding a new research network from 2015 to 2019 with up to 35 million euros to investigate mental disorders in order to devise and develop better therapeutic measures and strategies for this population by means of basic and translational clinical research. This is the result of a competitive call for research proposals entitled research network for mental diseases. It is a nationwide network of nine consortia with up to ten psychiatric and clinical psychology partner institutions from largely university-based research facilities for adults and/or children and adolescents. Furthermore, three cross-consortia platform projects will seek to identify shared causes of diseases and new diagnostic modalities for anxiety disorders, attention deficit hyperactivity disorders (ADHS), autism, bipolar disorders, depression, schizophrenia and psychotic disorders as well as substance-related and addictive disorders. The spectrum of therapeutic approaches to be examined ranges from innovative pharmacological and psychotherapeutic treatment to novel brain stimulation procedures. In light of the enormous burden such diseases represent for society as a whole, a sustainable improvement in the financial support for those researching mental disorders seems essential. This network aims to become a nucleus for long overdue and sustained support for a German center for mental disorders. Y1 - 2016 U6 - https://doi.org/10.1007/s00115-016-0169-y SN - 0028-2804 SN - 1433-0407 VL - 87 SP - 989 EP - 1010 PB - Springer CY - New York ER - TY - JOUR A1 - Block, Andrea A1 - Schulze, Susanne A1 - Deeken, Friederike A1 - Häusler, Andreas A1 - Rezo, Anna A1 - Rapp, Michael Armin A1 - Wippert, Pia-Maria T1 - Effects of inflammatory markers and biographical stress on treatment response in depression JF - Psychoneuroendocrinology : an international journal ; the official journal of the International Society of Psychoneuroendocrinology N2 - Background Recent research emphasized the role of inflammatory processes in the pathophysiology of depression. Theories hypothesizes that life events (LE) can affect the immune system and trigger depressive symptoms. LE are also considered as one of the best predictors for the onset and course of depressive disorders. Methods Observational study across three treatment settings: n=208 depressive patients (75.5%f, M 46.6 y) were examined on depression (BDI-II), life events (ILE) and inflammatory markers (IL-6, CRP, fibrinogen, ICAM-1, TNF-alpha, E-selectin) at baseline (t0), 5-week(t1) and 5-month(t2) follow-up. Effects and interactions were analyzed with regression models. Results LE were associated with depressive symptoms at t0 (beta=.209; p=.002) and both follow-ups. Except for CRP, which was linked to depression symptoms at t2 (betai=-.190; p=.032), there were no effects of inflammatory markers on depressive symptoms. At t1, an interaction between CRP and LE in total (beta=-.249; p=.041) was found as well as for LE in the past five years (beta=-.122; p=.027). Similar interactions were found between cumulative LE and ICAM-1 (beta=-.197; p=.003) and IL-6 (beta=-.425; p=.001). Conclusion The cumulative burden of LE effects symptoms and treatment outcome in depressive patients. There is some evidence that inflammatory marker may have long-term effects on treatment outcome as they seem to weaken the determining relation between LE and depression. Y1 - 2021 U6 - https://doi.org/10.1016/j.psyneuen.2021.105535 SN - 0306-4530 SN - 1873-3360 VL - 131 IS - Supplement SP - S24 EP - S24 PB - Elsevier CY - Oxford ER - TY - BOOK A1 - Fuhrmann, Michaela A1 - Goertz, Stefanie A1 - Klages, Benjamin A1 - Last, Dominique A1 - Strickroth, Sven A1 - Schubarth, Wilfried A1 - Mauermeister, Sylvi A1 - Schulze-Reichelt, Friederike A1 - Erdmann, Melinda A1 - Dreyer, Martin A1 - Konarski, Michael A1 - Tägener, Judith A1 - Lucke, Ulrike A1 - Hafer, Jörg A1 - Hartmann, Niklas A1 - Nguyen, Thi To-Uyen A1 - Wittkowski, Ariane A1 - Prickett, David James A1 - Degen, Andreas A1 - Rost, Sophia A1 - Kiy, Alexander A1 - Wagner, Nelli A1 - Gödel, Corinna A1 - Klinnert, Anne A1 - Babbe, Caroline A1 - Schneider, Marie A1 - Hille, Kerstin ED - Goertz, Stefanie ED - Klages, Benjamin ED - Last, Dominique ED - Strickroth, Sven T1 - Lehre und Lernen entwickeln - Eine Frage der Gestaltung von Übergängen BT - Erfahrungen aus 9 Jahren Qualitätspakt Lehre an der Universität Potsdam T3 - Potsdamer Beiträge zur Hochschulforschung N2 - An der Universität Potsdam wurden im Rahmen des Qualitätspakt Lehre-Projekts „Qualität etablieren in Lehre und Lernen (QueLL)“ Maßnahmen für eine Verbesserung der Studienbedingungen und eine Weiterentwicklung der Lehre und des Lernens durchgeführt. Die während der neunjährigen Projektlaufzeit thematisierten Fragestellungen, erarbeiteten Lösungsansätze und entsprechenden Erfahrungen werden im vorliegenden Sammelband in Form von wissenschaftlichen Auseinandersetzungen und Werkstattberichten dargestellt und diskutiert. Die Beiträge spiegeln in ihrer thematischen Vielfalt unterschiedliche universitäre Übergangsphasen wider, wie in diesem Fall den Übergang in die Hochschule, Übergänge innerhalb der Hochschule (im Kontext der Organisationsentwicklung, der Weiterbildung akademischer Statusgruppen oder der Entwicklung einer digitalen Lehr-Lernkultur) und schließlich den Übergang in die Berufspraxis. Denn während der Projektlaufzeit hat sich gezeigt, dass die Gestaltung von Lehre und Lernen letztlich immer eine Gestaltung solcher Übergänge ist: sowohl zwischen den innerinstitutionellen Ebenen und Bereichen als auch zwischen Akteur/innen der Hochschule und schließlich ebenso innerhalb des Student Life Cycle. Weiterhin wird anhand der Beiträge deutlich, dass die Entwicklung von Lehre und Studium nicht als isolierte Aufgabe verstanden werden kann, sondern in die Strukturen und Prozesse der Universität hineinwirken und Formen der Zusammenarbeit etablieren sollte, die es braucht, um Projekte nachhaltig zu gestalten. Ziel dieses Bandes ist es, zur Diskussion über Gelingensbedingungen einer nachhaltigen Entwicklung von Lehre und Lernen beizutragen. Damit richtet er sich an Akteur/innen aus der Hochschulleitung, an Lehrende und Forschende sowie Mitarbeitende des Third Space. T3 - Potsdamer Beiträge zur Hochschulforschung - 6 KW - Hochschulentwicklung KW - Qualität in Lehre und Studium KW - Praxisbeispiele KW - Digitalisierung KW - Student-Life-Cycle Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-476815 SN - 978-3-86956-498-2 SN - 2192-1075 SN - 2192-1083 IS - 6 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - GEN A1 - Schulze, Michael A1 - Utecht, Manuel Martin A1 - Moldt, Thomas A1 - Przyrembel, Daniel A1 - Gahl, Cornelius A1 - Weinelt, Martin A1 - Saalfrank, Peter A1 - Tegeder, Petra T1 - Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers N2 - The combination of photochromic and nonlinear optical (NLO) properties of azobenzene-functionalized self-assembled monolayers (SAMs) constitutes an intriguing step towards novel photonic and optoelectronic devices. By utilizing the second-order NLO process of second harmonic generation (SHG), supported by density-functional theory and correlated wave function method calculations, we demonstrate that the photochromic interface provides the necessary prerequisites en route towards possible future technical applications: we find a high NLO contrast on the order of 16% between the switching states. These are furthermore accessible reversibly and with high efficiencies in terms of cross sections on the order of 10−18 cm2 for both photoisomerization reactions, i.e., drivable by means of low-power LED light sources. Finally, both photostationary states (PSSs) are thermally stable at ambient conditions. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 196 Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-81198 ER - TY - JOUR A1 - Schulze, Michael A1 - Utecht, Manuel Martin A1 - Moldt, Thomas A1 - Przyrembel, Daniel A1 - Gahl, Cornelius A1 - Weinelt, Martin A1 - Saalfrank, Peter A1 - Tegeder, Petra T1 - Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers JF - Physical chemistry, chemical physics : a journal of European Chemical Societies N2 - The combination of photochromic and nonlinear optical (NLO) properties of azobenzene-functionalized self-assembled monolayers (SAMs) constitutes an intriguing step towards novel photonic and optoelectronic devices. By utilizing the second-order NLO process of second harmonic generation (SHG), supported by density-functional theory and correlated wave function method calculations, we demonstrate that the photochromic interface provides the necessary prerequisites en route towards possible future technical applications: we find a high NLO contrast on the order of 16% between the switching states. These are furthermore accessible reversibly and with high efficiencies in terms of cross sections on the order of 10(-18) cm(2) for both photoisomerization reactions, i.e., drivable by means of low-power LED light sources. Finally, both photostationary states (PSSs) are thermally stable at ambient conditions. Y1 - 2015 U6 - https://doi.org/10.1039/c5cp03093e SN - 1463-9076 SN - 1463-9084 VL - 17 IS - 27 SP - 18079 EP - 18086 PB - Royal Society of Chemistry CY - Cambridge ER - TY - JOUR A1 - Schulze, Michael A1 - Utecht, Manuel Martin A1 - Hebert, Andreas A1 - Rück-Braun, Karola A1 - Saalfrank, Peter A1 - Tegeder, Petra T1 - Reversible Photoswitching of the Interfacial Nonlinear Optical Response JF - The journal of physical chemistry letters N2 - Incorporating photochromic molecules into organic/inorganic hybrid materials may lead to photoresponsive systems. In such systems, the second-order nonlinear properties can be controlled via external stimulation with light at an appropriate wavelength. By creating photochromic molecular switches containing self-assembled monolayers on Si(111), we can demonstrate efficient reversible switching, which is accompanied by a pronounced modulation of the nonlinear optical (NLO) response of the system. The concept of utilizing functionalized photoswitchable Si surfaces could be a way for the generation of two-dimensional NLO switching materials, which are promising for applications in photonic and optoelectronic devices. Y1 - 2015 U6 - https://doi.org/10.1021/jz502477m SN - 1948-7185 VL - 6 IS - 3 SP - 505 EP - 509 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Schulze, Susanne A1 - Merz, Sibille A1 - Thier, Anne A1 - Tallarek, Marie A1 - König, Franziska A1 - Uhlenbrock, Greta A1 - Nübling, Matthias A1 - Lincke, Hans-Joachim A1 - Rapp, Michael A. A1 - Spallek, Jacob A1 - Holmberg, Christine T1 - Psychosocial burden in nurses working in nursing homes during the Covid-19 pandemic BT - a cross-sectional study with quantitative and qualitative data JF - BMC health services research N2 - Background The Covid-19 pandemic led to increased work-related strain and psychosocial burden in nurses worldwide, resulting in high prevalences of mental health problems. Nurses in long-term care facilities seem to be especially affected by the pandemic. Nevertheless, there are few findings indicating possible positive changes for health care workers. Therefore, we investigated which psychosocial burdens and potential positive aspects nurses working in long-term care facilities experience during the Covid-19 pandemic. Methods We conducted a mixed-methods study among nurses and nursing assistants working in nursing homes in Germany. The survey contained the third German version of the Copenhagen Psychosocial Questionnaire (COPSOQ III). Using Welch's t-tests, we compared the COPSOQ results of our sample against a pre-pandemic reference group of geriatric nurses from Germany. Additionally, we conducted semi-structured interviews with geriatric nurses with a special focus on psychosocial stress, to reach a deeper understanding of their experiences on work-related changes and burdens during the pandemic. Data were analysed using thematic coding (Braun and Clarke). Results Our survey sample (n = 177) differed significantly from the pre-pandemic reference group in 14 out of 31 COPSOQ scales. Almost all of these differences indicated negative changes. Our sample scored significantly worse regarding the scales 'quantitative demands', 'hiding emotions', 'work-privacy conflicts', 'role conflicts', 'quality of leadership', 'support at work', 'recognition', 'physical demands', 'intention to leave profession', 'burnout', 'presenteeism' and 'inability to relax'. The interviews (n = 15) revealed six main themes related to nurses' psychosocial stress: 'overall working conditions', 'concern for residents', 'management of relatives', 'inability to provide terminal care', 'tensions between being infected and infecting others' and 'technicisation of care'. 'Enhanced community cohesion' (interviews), 'meaning of work' and 'quantity of social relations' (COPSOQ III) were identified as positive effects of the pandemic. Conclusions Results clearly illustrate an aggravation of geriatric nurses' situation and psychosocial burden and only few positive changes due to the Covid-19 pandemic. Pre-existing hardships seem to have further deteriorated and new stressors added to nurses' strain. The perceived erosion of care, due to an overemphasis of the technical in relation to the social and emotional dimensions of care, seems to be especially burdensome to geriatric nurses. KW - COPSOQ KW - Nurses KW - Nursing home KW - Psychosocial burden KW - Mixed-methods study KW - Covid-19 Y1 - 2022 U6 - https://doi.org/10.1186/s12913-022-08333-3 SN - 1472-6963 VL - 22 IS - 1 PB - BMC CY - London ER - TY - JOUR A1 - Schulze, Michael A1 - Utecht, Manuel Martin A1 - Moldt, Thomas A1 - Przyrembel, Daniel A1 - Gahl, Cornelius A1 - Weinelt, Martin A1 - Saalfrank, Peter A1 - Tegeder, Petra T1 - Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers JF - Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies N2 - The combination of photochromic and nonlinear optical (NLO) properties of azobenzene-functionalized self-assembled monolayers (SAMs) constitutes an intriguing step towards novel photonic and optoelectronic devices. By utilizing the second-order NLO process of second harmonic generation (SHG), supported by density-functional theory and correlated wave function method calculations, we demonstrate that the photochromic interface provides the necessary prerequisites en route towards possible future technical applications: we find a high NLO contrast on the order of 16% between the switching states. These are furthermore accessible reversibly and with high efficiencies in terms of cross sections on the order of 10−18 cm2 for both photoisomerization reactions, i.e., drivable by means of low-power LED light sources. Finally, both photostationary states (PSSs) are thermally stable at ambient conditions. Y1 - 2015 U6 - https://doi.org/10.1039/c5cp03093e SN - 1463-9076 SN - 1463-9084 VL - 27 IS - 17 SP - 18079 EP - 18086 PB - Royal Society of Chemistry CY - Cambridge ER - TY - JOUR A1 - Schneeberger, Karin A1 - Schulze, Michael A1 - Scheffler, Ingo A1 - Caspers, Barbara A. T1 - Evidence of female preference for odor of distant over local males in a bat with female dispersal JF - Behavioral ecology : the official journal of the International Society for Behavioral Ecology N2 - Geographic variation of sexually selected male traits is common in animals. Female choice also varies geographically and several studies found female preference for local males, which is assumed to lead to local adaptation and, therefore, increases fitness. As females are the nondispersing sex in most mammalian taxa, this preference for local males might be explained by the learning of male characteristics. Studies on the preference of females in female-dispersing species are lacking so far. To find out whether such females would also show preferences for local males, we conducted a study on greater sac-winged bats (Saccopteryx bilineata), a species where females disperse and males stay in their natal colony. Male greater sac-winged bats possess a wing pouch that is filled with odoriferous secretion and fanned toward females during courtship display. In a combination of chemical analysis and behavioral preference tests, we analyzed whether the composition of wing sac secretion varies between two geographically distinct populations (300 km), and whether females show a preference for local or distant male scent. Using gas chromatography, we found significant differences in the composition of the wing sac odors between the two geographically distinct populations. In addition, the behavioral preference experiments revealed that females of both populations preferred the scent of geographically distant males over local males. The wing sac odor might thus be used to guarantee optimal outbreeding when dispersing to a new colony. This is-to our knowledge-the first study on odor preference of females of a species with female-biased dispersal. KW - bats KW - dispersal KW - female preference KW - male philopatry KW - odor KW - olfaction Y1 - 2021 U6 - https://doi.org/10.1093/beheco/arab003 SN - 1045-2249 SN - 1465-7279 VL - 32 IS - 4 SP - 657 EP - 661 PB - Oxford University Press CY - Oxford ER - TY - JOUR A1 - Xenopoulos, M. A. A1 - Lodge, D. M. A1 - Alcamo, Joseph A1 - Marker, Michael A1 - Schulze, K. A1 - Van Vuuren, Detlef P. T1 - Scenarios of freshwater fish extinctions from climate change and water withdrawal N2 - Reductions in river discharge (water availability) like those from climate change or increased water withdrawal, reduce freshwater biodiversity. We combined two scenarios from the Intergovernmental Panel for Climate Change with a global hydrological model to build global scenarios of future losses in river discharge from climate change and increased water withdrawal. Applying these results to known relationships between fish species and discharge, we build scenarios of losses (at equilibrium) of riverine fish richness. In rivers with reduced discharge, up to 75% (quartile range 4-22%) of local fish biodiversity would be headed toward extinction by 2070 because of combined changes in climate and water consumption. Fish loss in the scenarios fell disproportionately on poor countries. Reductions in water consumption could prevent many of the extinctions in these scenarios Y1 - 2005 SN - 1354-1013 ER - TY - JOUR A1 - Weber, Michael H. A1 - Abu-Ayyash, Khalil A1 - Abueladas, Abdel-Rahman A1 - Agnon, Amotz A1 - Al-Amoush, H. A1 - Babeyko, Andrey A1 - Bartov, Yosef A1 - Baumann, M. A1 - Ben-Avraham, Zvi A1 - Bock, Günter A1 - Bribach, Jens A1 - El-Kelani, R. A1 - Forster, A. A1 - Förster, Hans-Jürgen A1 - Frieslander, U. A1 - Garfunkel, Zvi A1 - Grunewald, Steffen A1 - Gotze, Hans-Jürgen A1 - Haak, Volker A1 - Haberland, Christian A1 - Hassouneh, Mohammed A1 - Helwig, S. A1 - Hofstetter, Alfons A1 - Jackel, K. H. A1 - Kesten, Dagmar A1 - Kind, Rainer A1 - Maercklin, Nils A1 - Mechie, James A1 - Mohsen, Amjad A1 - Neubauer, F. M. A1 - Oberhänsli, Roland A1 - Qabbani, I. A1 - Ritter, O. A1 - Rumpker, G. A1 - Rybakov, M. A1 - Ryberg, Trond A1 - Scherbaum, Frank A1 - Schmidt, J. A1 - Schulze, A. A1 - Sobolev, Stephan Vladimir A1 - Stiller, M. A1 - Th, T1 - The crustal structure of the Dead Sea Transform N2 - To address one of the central questions of plate tectonics-How do large transform systems work and what are their typical features?-seismic investigations across the Dead Sea Transform (DST), the boundary between the African and Arabian plates in the Middle East, were conducted for the first time. A major component of these investigations was a combined reflection/ refraction survey across the territories of Palestine, Israel and Jordan. The main results of this study are: (1) The seismic basement is offset by 3-5 km under the DST, (2) The DST cuts through the entire crust, broadening in the lower crust, (3) Strong lower crustal reflectors are imaged only on one side of the DST, (4) The seismic velocity sections show a steady increase in the depth of the crust-mantle transition (Moho) from 26 km at the Mediterranean to 39 km under the Jordan highlands, with only a small but visible, asymmetric topography of the Moho under the DST. These observations can be linked to the left-lateral movement of 105 km of the two plates in the last 17 Myr, accompanied by strong deformation within a narrow zone cutting through the entire crust. Comparing the DST and the San Andreas Fault (SAF) system, a strong asymmetry in subhorizontal lower crustal reflectors and a deep reaching deformation zone both occur around the DST and the SAF. The fact that such lower crustal reflectors and deep deformation zones are observed in such different transform systems suggests that these structures are possibly fundamental features of large transform plate boundaries Y1 - 2004 ER - TY - JOUR A1 - Saarimäki, Eetta A1 - Paajanen, Mika A1 - Savijärvi, Ann-Mari A1 - Minkkinen, Hannu A1 - Wegener, Michael A1 - Voronina, Olena A1 - Schulze, Robert A1 - Wirges, Werner A1 - Gerhard, Reimund T1 - Novel heat durable electromechanical film : processing for electromechanical and electret applications N2 - 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. Y1 - 2006 ER - TY - JOUR A1 - Schulze-Makuch, Dirk A1 - Wagner, Dirk A1 - Kounaves, Samuel P. A1 - Mangelsdorf, Kai A1 - Devine, Kevin G. A1 - de Vera, Jean-Pierre A1 - Schmitt-Kopplin, Philippe A1 - Grossart, Hans-Peter A1 - Parro, Victor A1 - Kaupenjohann, Martin A1 - Galy, Albert A1 - Schneider, Beate A1 - Airo, Alessandro A1 - Froesler, Jan A1 - Davila, Alfonso F. A1 - Arens, Felix L. A1 - Caceres, Luis A1 - Cornejo, Francisco Solis A1 - Carrizo, Daniel A1 - Dartnell, Lewis A1 - DiRuggiero, Jocelyne A1 - Flury, Markus A1 - Ganzert, Lars A1 - Gessner, Mark O. A1 - Grathwohl, Peter A1 - Guan, Lisa A1 - Heinz, Jacob A1 - Hess, Matthias A1 - Keppler, Frank A1 - Maus, Deborah A1 - McKay, Christopher P. A1 - Meckenstock, Rainer U. A1 - Montgomery, Wren A1 - Oberlin, Elizabeth A. A1 - Probst, Alexander J. A1 - Saenz, Johan S. A1 - Sattler, Tobias A1 - Schirmack, Janosch A1 - Sephton, Mark A. A1 - Schloter, Michael A1 - Uhl, Jenny A1 - Valenzuela, Bernardita A1 - Vestergaard, Gisle A1 - Woermer, Lars A1 - Zamorano, Pedro T1 - Transitory microbial habitat in the hyperarid Atacama Desert JF - Proceedings of the National Academy of Sciences of the United States of America KW - habitat KW - aridity KW - microbial activity KW - biomarker KW - Mars Y1 - 2018 U6 - https://doi.org/10.1073/pnas.1714341115 SN - 0027-8424 VL - 115 IS - 11 SP - 2670 EP - 2675 PB - National Acad. of Sciences CY - Washington ER -