@article{Naegeler2016, author = {N{\"a}geler, Pascal}, title = {Bericht {\"u}ber die T{\"a}tigkeit des Menschenrechtsausschusses der Vereinten Nationen im Jahre 2015 - Teil I: Staatenberichte}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {21}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95141}, pages = {65 -- 83}, year = {2016}, abstract = {I. Einf{\"u}hrung II. Allgemeines aus dem Jahre 2015 III. Staatenberichtsverfahren}, language = {de} } @article{NuthmannVituEngbertetal.2016, author = {Nuthmann, Antje and Vitu, Francoise and Engbert, Ralf and Kliegl, Reinhold}, title = {No Evidence for a Saccadic Range Effect for Visually Guided and Memory-Guided Saccades in Simple Saccade-Targeting Tasks}, series = {PLoS one}, volume = {11}, journal = {PLoS one}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0162449}, pages = {9935 -- 9943}, year = {2016}, abstract = {Saccades to single targets in peripheral vision are typically characterized by an undershoot bias. Putting this bias to a test, Kapoula [1] used a paradigm in which observers were presented with two different sets of target eccentricities that partially overlapped each other. Her data were suggestive of a saccadic range effect (SRE): There was a tendency for saccades to overshoot close targets and undershoot far targets in a block, suggesting that there was a response bias towards the center of eccentricities in a given block. Our Experiment 1 was a close replication of the original study by Kapoula [1]. In addition, we tested whether the SRE is sensitive to top-down requirements associated with the task, and we also varied the target presentation duration. In Experiments 1 and 2, we expected to replicate the SRE for a visual discrimination task. The simple visual saccade-targeting task in Experiment 3, entailing minimal top-down influence, was expected to elicit a weaker SRE. Voluntary saccades to remembered target locations in Experiment 3 were expected to elicit the strongest SRE. Contrary to these predictions, we did not observe a SRE in any of the tasks. Our findings complement the results reported by Gillen et al. [2] who failed to find the effect in a saccade-targeting task with a very brief target presentation. Together, these results suggest that unlike arm movements, saccadic eye movements are not biased towards making saccades of a constant, optimal amplitude for the task.}, language = {en} } @article{NukarinenNaegelePedrottietal.2016, author = {Nukarinen, Ella and N{\"a}gele, Thomas and Pedrotti, Lorenzo and Wurzinger, Bernhard and Mair, Andrea and Landgraf, Ramona and B{\"o}rnke, Frederik and Hanson, Johannes and Teige, Markus and Baena-Gonzalez, Elena and Dr{\"o}ge-Laser, Wolfgang and Weckwerth, Wolfram}, title = {Quantitative phosphoproteomics reveals the role of the AMPK plant ortholog SnRK1 as a metabolic master regulator under energy deprivation}, series = {Scientific reports}, volume = {6}, journal = {Scientific reports}, publisher = {Nature Publ. Group}, address = {London}, issn = {2045-2322}, doi = {10.1038/srep31697}, pages = {10248 -- 10252}, year = {2016}, abstract = {Since years, research on SnRK1, the major cellular energy sensor in plants, has tried to define its role in energy signalling. However, these attempts were notoriously hampered by the lethality of a complete knockout of SnRK1. Therefore, we generated an inducible amiRNA:: SnRK1 alpha 2 in a snrk1 alpha 1 knock out background (snrk1 alpha 1/alpha 2) to abolish SnRK1 activity to understand major systemic functions of SnRK1 signalling under energy deprivation triggered by extended night treatment. We analysed the in vivo phosphoproteome, proteome and metabolome and found that activation of SnRK1 is essential for repression of high energy demanding cell processes such as protein synthesis. The most abundant effect was the constitutively high phosphorylation of ribosomal protein S6 (RPS6) in the snrk1 alpha 1/alpha 2 mutant. RPS6 is a major target of TOR signalling and its phosphorylation correlates with translation. Further evidence for an antagonistic SnRK1 and TOR crosstalk comparable to the animal system was demonstrated by the in vivo interaction of SnRK1 alpha 1 and RAPTOR1B in the cytosol and by phosphorylation of RAPTOR1B by SnRK1 alpha 1 in kinase assays. Moreover, changed levels of phosphorylation states of several chloroplastic proteins in the snrk1 alpha 1/alpha 2 mutant indicated an unexpected link to regulation of photosynthesis, the main energy source in plants.}, language = {en} } @misc{Nowrot2016, author = {Nowrot, Karsten}, title = {Der Beitrag der OECD-Leits{\"a}tze f{\"u}r multinationale Unternehmen zum Schutz der Menschenrechte [rezensiert von Karsten Nowrot]}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {21}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95151}, pages = {84 -- 88}, year = {2016}, abstract = {Buchbesprechung: Karen Weidmann, Der Beitrag der OECD-Leits{\"a}tze f{\"u}r multinationale Unternehmen zum Schutz der Menschenrechte, Schriften zum V{\"o}lkerrecht Bd. 208, Duncker \& Humblot, 2014, 438 Seiten, ISBN 978-3-428-14284-2, 89,90 €.}, language = {de} } @phdthesis{Nowotny2016, author = {Nowotny, Kerstin}, title = {The impact of collagen modifications by methylglyoxal on fibroblast function and the role in aging}, school = {Universit{\"a}t Potsdam}, pages = {107}, year = {2016}, language = {de} } @article{NowakSzczepanskaGomulaIpsenetal.2016, author = {Nowak-Szczepanska, Natalia and Gomula, A. and Ipsen, Marie Josephin and Koziel, Slawomir}, title = {Different effects of living conditions on the variation in BMI and height in children before the onset of puberty}, series = {European journal of clinical nutrition}, volume = {70}, journal = {European journal of clinical nutrition}, publisher = {Nature Publ. Group}, address = {London}, issn = {0954-3007}, doi = {10.1038/ejcn.2016.30}, pages = {662 -- 666}, year = {2016}, abstract = {SUBJECTS/METHODS: The study included 5597 boys and 5479 girls aged 7-8 years of age. Socioeconomic status (SES) was defined in three categories: high, medium and low. RESULTS: Between 1966 and 2012, the mean values for height and BMI significantly increased in both sexes (P<0.001). The variation of these two parameters, however, showed a different pattern. Whereas the variation in Z-values for height remained unchanged in both sexes, the variation in BMI increased in boys (P<0.01) but not in girls. SES affected the variation in Z-BMI in 1978 in both sexes (P<0.001), whereas variation in Z-height between SES categories remained unchanged across all years of surveys in boys. Before the political transformation, significant regional differences were observed in the variances of Z-BMI (P<0.05) but not of Z-height. This pattern changed after the political transformation, when regional differences in variances of Z-BMI disappeared. CONCLUSIONS: It is concluded that the mean values and the variation of BMI are affected by a changing quality of life, whereas the variation in height is usually independent of living conditions.}, language = {en} } @article{NouryBernetSchildgenetal.2016, author = {Noury, M. and Bernet, M. and Schildgen, Taylor F. and Simon-Labric, T. and Philippon, M. and Sempere, T.}, title = {Crustal-scale block tilting during Andean trench-parallel extension: Structural and geo-thermochronological insights}, series = {Tectonics}, volume = {35}, journal = {Tectonics}, publisher = {American Geophysical Union}, address = {Washington}, issn = {0278-7407}, doi = {10.1002/2016TC004231}, pages = {2052 -- 2069}, year = {2016}, abstract = {Despite a long history of plate convergence at the western margin of the South American plate that has been ongoing since at least the Early Paleozoic, the southern Peruvian fore-arc displays little to no evidence of shortening. In the light of this observation, we assess the deformation history of the southern Peruvian fore-arc and its geodynamic implications. To accomplish this, we present a new structural and geo-thermochronological data set (zircon U-Pb, mica Ar-40/Ar-39, apatite and zircon fission-track and zircon (U-Th)/He analyses) for samples collected along a 400km long transect parallel to the trench. Our results show that the Mesoproterozoic gneissic basement was mainly at temperatures 350 degrees C since the Neoproterozoic and was later intruded by Jurassic volcanic arc plutons. Along the coast, a peculiar apatite fission-track age pattern, coupled with field observations and a synthesis of available geological maps, allows us to identify crustal-scale tilted blocks that span the coastal Peruvian fore-arc. These blocks, bounded by normal faults that are orthogonal to the trench, suggest post-60Ma trench-parallel extension that potentially accommodated oroclinal bending in this region. Block tilting is consistent with the observed and previously described switch in the location of sedimentary sources in the fore-arc basin. Our data set allows us to estimate the cumulative slip on these faults to be less than 2km and questions the large amount of trench-parallel extension suggested to have accommodated this bending.}, language = {en} } @misc{NojimaKonishiJaptoketal.2016, author = {Nojima, Hiroyuki and Konishi, Takanori and Japtok, Lukasz and Kleuser, Burkhard and Edwards, Michael J. and Gulbins, Erich and Lentsch, Alex B.}, title = {Chemokine receptors, CXCR1 and CXCR2, differentially regulate exosome release in hepatocytes}, series = {Hepatology : official journal of the American Association for the Study of Liver Diseases}, volume = {64}, journal = {Hepatology : official journal of the American Association for the Study of Liver Diseases}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {0270-9139}, pages = {165A -- 165A}, year = {2016}, language = {en} } @misc{NojimaKonishiFreemanetal.2016, author = {Nojima, Hiroyuki and Konishi, Takanori and Freeman, Christopher M. and Schuster, Rebecca M. and Japtok, Lukasz and Kleuser, Burkhard and Edwards, Michael J. and Gulbins, Erich and Lentsch, Alex B.}, title = {Chemokine receptors, CXCR1 and CXCR2, differentially regulate exosome release in hepatocytes}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {538}, issn = {1866-8372}, doi = {10.25932/publishup-41088}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-410885}, pages = {15}, year = {2016}, abstract = {Exosomes are small membrane vesicles released by different cell types, including hepatocytes, that play important roles in intercellular communication. We have previously demonstrated that hepatocyte-derived exosomes contain the synthetic machinery to form sphingosine-1-phosphate (S1P) in target hepatocytes resulting in proliferation and liver regeneration after ischemia/reperfusion (I/R) injury. We also demonstrated that the chemokine receptors, CXCR1 and CXCR2, regulate liver recovery and regeneration after I/R injury. In the current study, we sought to determine if the regulatory effects of CXCR1 and CXCR2 on liver recovery and regeneration might occur via altered release of hepatocyte exosomes. We found that hepatocyte release of exosomes was dependent upon CXCR1 and CXCR2. CXCR1-deficient hepatocytes produced fewer exosomes, whereas CXCR2-deficient hepatocytes produced more exosomes compared to their wild-type controls. In CXCR2-deficient hepatocytes, there was increased activity of neutral sphingomyelinase (Nsm) and intracellular ceramide. CXCR1-deficient hepatocytes had no alterations in Nsm activity or ceramide production. Interestingly, exosomes from CXCR1-deficient hepatocytes had no effect on hepatocyte proliferation, due to a lack of neutral ceramidase and sphingosine kinase. The data demonstrate that CXCR1 and CXCR2 regulate hepatocyte exosome release. The mechanism utilized by CXCR1 remains elusive, but CXCR2 appears to modulate Nsm activity and resultant production of ceramide to control exosome release. CXCR1 is required for packaging of enzymes into exosomes that mediate their hepatocyte proliferative effect.}, language = {en} } @article{NojimaKonishiFreemanetal.2016, author = {Nojima, Hiroyuki and Konishi, Takanori and Freeman, Christopher M. and Schuster, Rebecca M. and Japtok, Lukasz and Kleuser, Burkhard and Edwards, Michael J. and Gulbins, Erich and Lentsch, Alex B.}, title = {Chemokine Receptors, CXCR1 and CXCR2, Differentially Regulate Exosome Release in Hepatocytes}, series = {PLoS one}, volume = {11}, journal = {PLoS one}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0161443}, pages = {6900 -- +}, year = {2016}, abstract = {Exosomes are small membrane vesicles released by different cell types, including hepatocytes, that play important roles in intercellular communication. We have previously demonstrated that hepatocyte-derived exosomes contain the synthetic machinery to form sphingosine-1-phosphate (S1P) in target hepatocytes resulting in proliferation and liver regeneration after ischemia/reperfusion (I/R) injury. We also demonstrated that the chemokine receptors, CXCR1 and CXCR2, regulate liver recovery and regeneration after I/R injury. In the current study, we sought to determine if the regulatory effects of CXCR1 and CXCR2 on liver recovery and regeneration might occur via altered release of hepatocyte exosomes. We found that hepatocyte release of exosomes was dependent upon CXCR1 and CXCR2. CXCR1-deficient hepatocytes produced fewer exosomes, whereas CXCR2-deficient hepatocytes produced more exosomes compared to their wild-type controls. In CXCR2-deficient hepatocytes, there was increased activity of neutral sphingomyelinase (Nsm) and intracellular ceramide. CXCR1-deficient hepatocytes had no alterations in Nsm activity or ceramide production. Interestingly, exosomes from CXCR1-deficient hepatocytes had no effect on hepatocyte proliferation, due to a lack of neutral ceramidase and sphingosine kinase. The data demonstrate that CXCR1 and CXCR2 regulate hepatocyte exosome release. The mechanism utilized by CXCR1 remains elusive, but CXCR2 appears to modulate Nsm activity and resultant production of ceramide to control exosome release. CXCR1 is required for packaging of enzymes into exosomes that mediate their hepatocyte proliferative effect.}, language = {en} } @article{NojimaFreemanSchusteretal.2016, author = {Nojima, Hiroyuki and Freeman, Christopher M. and Schuster, Rebecca M. and Japtok, Lukasz and Kleuser, Burkhard and Edwards, Michael J. and Gulbins, Erich and Lentsch, Alex B.}, title = {Hepatocyte exosomes mediate liver repair and regeneration via sphingosine-1-phosphate}, series = {Journal of hepatology}, volume = {64}, journal = {Journal of hepatology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0168-8278}, doi = {10.1016/j.jhep.2015.07.030}, pages = {60 -- 68}, year = {2016}, abstract = {Background \& Aims: Exosomes are small membrane vesicles involved in intercellular communication. Hepatocytes are known to release exosomes, but little is known about their biological function. We sought to determine if exosomes derived from hepatocytes contribute to liver repair and regeneration after injury. Methods: Exosomes derived from primary murine hepatocytes were isolated and characterized biochemically and biophysically. Using cultures of primary hepatocytes, we tested whether hepatocyte exosomes induced proliferation of hepatocytes in vitro. Using models of ischemia/reperfusion injury and partial hepatectomy, we evaluated whether hepatocyte exosomes promote hepatocyte proliferation and liver regeneration in vivo. Results: Hepatocyte exosomes, but not exosomes from other liver cell types, induce dose-dependent hepatocyte proliferation in vitro and in vivo. Mechanistically, hepatocyte exosomes directly fuse with target hepatocytes and transfer neutral ceramidase and sphingosine kinase 2 (SK2) causing increased synthesis of sphingosine-1-phosphate (S1P) within target hepatocytes. Ablation of exosomal SK prevents the proliferative effect of exosomes. After ischemia/reperfusion injury, the number of circulating exosomes with proliferative effects increases. Conclusions: Our data shows that hepatocyte-derived exosomes deliver the synthetic machinery to form S1P in target hepatocytes resulting in cell proliferation and liver regeneration after ischemia/reperfusion injury or partial hepatectomy. These findings represent a potentially novel new contributing mechanism of liver regeneration and have important implications for new therapeutic approaches to acute and chronic liver disease. (C) 2015 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.}, language = {en} } @article{NixonvanRijMoketal.2016, author = {Nixon, Jessie S. and van Rij, Jacolien and Mok, Peggy and Baayen, Harald R. and Chen, Yiya}, title = {The temporal dynamics of perceptual uncertainty: eye movement evidence from Cantonese segment and tone perception}, series = {Journal of memory and language}, volume = {90}, journal = {Journal of memory and language}, publisher = {Elsevier}, address = {San Diego}, issn = {0749-596X}, doi = {10.1016/j.jml.2016.03.005}, pages = {103 -- 125}, year = {2016}, abstract = {Two visual world eyetracking experiments investigated how acoustic cue value and statistical variance affect perceptual uncertainty during Cantonese consonant (Experiment 1) and tone perception (Experiment 2). Participants heard low- or high-variance acoustic stimuli. Euclidean distance of fixations from target and competitor pictures over time was analysed using Generalised Additive Mixed Modelling. Distance of fixations from target and competitor pictures varied as a function of acoustic cue, providing evidence for gradient, nonlinear sensitivity to cue values. Moreover, cue value effects significantly interacted with statistical variance, indicating that the cue distribution directly affects perceptual uncertainty. Interestingly, the time course of effects differed between target distance and competitor distance models. The pattern of effects over time suggests a global strategy in response to the level of uncertainty: as uncertainty increases, verification looks increase accordingly. Low variance generally creates less uncertainty, but can lead to greater uncertainty in the face of unexpected speech tokens. (C) 2016 Elsevier Inc. All rights reserved.}, language = {en} } @article{Nix2016, author = {Nix, Andreas}, title = {Karl Mannheims Konservatismus}, series = {Kultursoziologie : Kultursozologie an deutschen Universit{\"a}ten}, volume = {2016}, journal = {Kultursoziologie : Kultursozologie an deutschen Universit{\"a}ten}, number = {2}, editor = {Geier, Wolfgang}, publisher = {WeltTrends}, address = {Potsdam}, isbn = {978-3-945878-24-8}, issn = {0941-343X}, pages = {102 -- 108}, year = {2016}, language = {de} } @article{NitzeGrosse2016, author = {Nitze, Ingmar and Grosse, Guido}, title = {Detection of landscape dynamics in the Arctic Lena Delta with temporally dense Landsat time-series stacks}, series = {Remote sensing of environment : an interdisciplinary journal}, volume = {181}, journal = {Remote sensing of environment : an interdisciplinary journal}, publisher = {Elsevier}, address = {New York}, issn = {0034-4257}, doi = {10.1016/j.rse.2016.03.038}, pages = {27 -- 41}, year = {2016}, abstract = {Arctic permafrost landscapes are among the most vulnerable and dynamic landscapes globally, but due to their extent and remoteness most of the landscape changes remain unnoticed. In order to detect disturbances in these areas we developed an automated processing chain for the calculation and analysis of robust trends of key land surface indicators based on the full record of available Landsat TM, ETM +, and OLI data. The methodology was applied to the similar to 29,000 km(2) Lena Delta in Northeast Siberia, where robust trend parameters (slope, confidence intervals of the slope, and intercept) were calculated for Tasseled Cap Greenness, Wetness and Brightness, NDVI, and NDWI, and NDMI based on 204 Landsat scenes for the observation period between 1999 and 2014. The resulting datasets revealed regional greening trends within the Lena Delta with several localized hot-spots of change, particularly in the vicinity of the main river channels. With a 30-m spatial resolution various permafrost-thaw related processes and disturbances, such as thermokarst lake expansion and drainage, fluvial erosion, and coastal changes were detected within the Lena Delta region, many of which have not been noticed or described before. Such hotspots of permafrost change exhibit significantly different trend parameters compared to non-disturbed areas. The processed dataset, which is made freely available through the data archive PANGAEA, will be a useful resource for further process specific analysis by researchers and land managers. With the high level of automation and the use of the freely available Landsat archive data, the workflow is scalable and transferrable to other regions, which should enable the comparison of land surface changes in different permafrost affected regions and help to understand and quantify permafrost landscape dynamics. (C) 2016 Elsevier Inc. All rights reserved.}, language = {en} } @misc{NiskanenKooserKoskeloetal.2016, author = {Niskanen, Johannes and Kooser, Kuno and Koskelo, Jaakko and K{\"a}{\"a}mbre, Tanel and Kunnus, Kristjan and Pietzsch, Annette and Quevedo, Wilson and Hakala, Mikko and F{\"o}hlisch, Alexander and Huotari, Simo and Kukk, Edwin}, title = {Density functional simulation of resonant inelastic X-ray scattering experiments in liquids: acetonitrile}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-395133}, pages = {7}, year = {2016}, abstract = {In this paper we report an experimental and computational study of liquid acetonitrile (H3C-C[triple bond, length as m-dash]N) by resonant inelastic X-ray scattering (RIXS) at the N K-edge. The experimental spectra exhibit clear signatures of the electronic structure of the valence states at the N site and incident-beam-polarization dependence is observed as well. Moreover, we find fine structure in the quasielastic line that is assigned to finite scattering duration and nuclear relaxation. We present a simple and light-to-evaluate model for the RIXS maps and analyze the experimental data using this model combined with ab initio molecular dynamics simulations. In addition to polarization-dependence and scattering-duration effects, we pinpoint the effects of different types of chemical bonding to the RIXS spectrum and conclude that the H2C-C[double bond, length as m-dash]NH isomer, suggested in the literature, does not exist in detectable quantities. We study solution effects on the scattering spectra with simulations in liquid and in vacuum. The presented model for RIXS proved to be light enough to allow phase-space-sampling and still accurate enough for identification of transition lines in physical chemistry research by RIXS.}, language = {en} } @misc{NishikawaMizunoNiemiecetal.2016, author = {Nishikawa, Ken-Ichi and Mizuno, Yosuke and Niemiec, Jacek and Kobzar, Oleh and Pohl, Martin and G{\´o}mez, Jose L. and Duţan, Ioana and Pe'er, Asaf and Frederiksen, Jacob Trier and Nordlund, {\AA}ke and Meli, Athina and Sol, Helene and Hardee, Philip E. and Hartmann, Dieter H.}, title = {Microscopic processes in global relativistic jets containing helical magnetic fields}, series = {Galaxies}, journal = {Galaxies}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-407604}, pages = {9}, year = {2016}, abstract = {In the study of relativistic jets one of the key open questions is their interaction with the environment on the microscopic level. Here, we study the initial evolution of both electron-proton (e(-)-p(+)) and electron-positron (e(+/-)) relativistic jets containing helical magnetic fields, focusing on their interaction with an ambient plasma. We have performed simulations of "global" jets containing helical magnetic fields in order to examine how helical magnetic fields affect kinetic instabilities such as the Weibel instability, the kinetic Kelvin-Helmholtz instability (kKHI) and the Mushroom instability (MI). In our initial simulation study these kinetic instabilities are suppressed and new types of instabilities can grow. In the e(-)-p(+) jet simulation a recollimation-like instability occurs and jet electrons are strongly perturbed. In the e(+/-) jet simulation a recollimation-like instability occurs at early times followed by a kinetic instability and the general structure is similar to a simulation without helical magnetic field. Simulations using much larger systems are required in order to thoroughly follow the evolution of global jets containing helical magnetic fields.}, language = {en} } @article{NishikawaMizunoNiemiecetal.2016, author = {Nishikawa, Ken-Ichi and Mizuno, Yosuke and Niemiec, Jacek and Kobzar, Oleh and Pohl, Martin and Gomez, Jose L. and Dutan, Ioana and Frederiksen, Jacob Trier and Nordlund, Ake and Meli, Athina and Sol, Helene and Hardee, Philip E. and Hartmann, Dieter H.}, title = {Microscopic Processes in Global Relativistic Jets Containing Helical Magnetic Fields}, series = {Galaxies : open access journal}, volume = {4}, journal = {Galaxies : open access journal}, publisher = {MDPI}, address = {Basel}, issn = {2075-4434}, doi = {10.3390/galaxies4040038}, pages = {9}, year = {2016}, abstract = {In the study of relativistic jets one of the key open questions is their interaction with the environment on the microscopic level. Here, we study the initial evolution of both electron-proton (e(-)-p(+)) and electron-positron (e(+/-)) relativistic jets containing helical magnetic fields, focusing on their interaction with an ambient plasma. We have performed simulations of "global" jets containing helical magnetic fields in order to examine how helical magnetic fields affect kinetic instabilities such as the Weibel instability, the kinetic Kelvin-Helmholtz instability (kKHI) and the Mushroom instability (MI). In our initial simulation study these kinetic instabilities are suppressed and new types of instabilities can grow. In the e(-)-p(+) jet simulation a recollimation-like instability occurs and jet electrons are strongly perturbed. In the e(+/-) jet simulation a recollimation-like instability occurs at early times followed by a kinetic instability and the general structure is similar to a simulation without helical magnetic field. Simulations using much larger systems are required in order to thoroughly follow the evolution of global jets containing helical magnetic fields.}, language = {en} } @article{NishikawaFrederiksenNordlundetal.2016, author = {Nishikawa, Ken-Ichi and Frederiksen, J. T. and Nordlund, A. and Mizuno, Y. and Hardee, P. E. and Niemiec, J. and Gomez, J. L. and Dutan, I. and Meli, A. and Sol, H. and Pohl, Martin and Hartmann, D. H.}, title = {EVOLUTION OF GLOBAL RELATIVISTIC JETS: COLLIMATIONS AND EXPANSION WITH kKHI AND THE WEIBEL INSTABILITY}, series = {The astrophysical journal : an international review of spectroscopy and astronomical physics}, volume = {820}, journal = {The astrophysical journal : an international review of spectroscopy and astronomical physics}, publisher = {IOP Publ. Ltd.}, address = {Bristol}, issn = {0004-637X}, doi = {10.3847/0004-637X/820/2/94}, pages = {14}, year = {2016}, abstract = {In the study of relativistic jets one of the key open questions is their interaction with the environment. Here. we study the initial evolution of both electron-proton (e(-) - p(+)) and electron-positron (e(+/-)) relativistic jets, focusing on their lateral interaction with ambient plasma. We follow the evolution of toroidal magnetic fields generated by both the kinetic Kelvin-Helmholtz and Mushroom instabilities. For an e(-) - p(+) jet, the induced magnetic field collimates the jet and electrons are perpendicularly accelerated. As the instabilities saturate and subsequently weaken, the magnetic polarity switches from clockwise to counterclockwise in the middle of the jet. For an e(+/-) jet, we find strong mixing of electrons and positrons with the ambient plasma, resulting in the creation of a bow shock. The merging of current filaments generates density inhomogeneities that. initiate a forward shock. Strong jet-ambient plasma mixing prevents a full development of the jet (on the scale studied), revealing evidence for both jet collimation and particle acceleration in the forming bow shock. Differences in the magnetic field structure generated by e(-) - p(+) and e(+/-) jets may contribute to the polarization properties of the observed emission in AGN jets and gamma-ray bursts.}, language = {en} } @article{NiproschkeOertelSchubarthetal.2016, author = {Niproschke, Saskia and Oertel, Lars and Schubarth, Wilfried and Ulbricht, Juliane and Bilz, Ludwig}, title = {More or Less Violence in Schools? A Replication Study from 1996-2014 in Saxon Schools}, series = {Zeitschrift f{\~A}¼r Soziologie der Erziehung und Sozialisation}, volume = {36}, journal = {Zeitschrift f{\~A}¼r Soziologie der Erziehung und Sozialisation}, publisher = {Juventa-Verl.}, address = {Weinheim}, issn = {1436-1957}, doi = {10.3262/ZSE1601078}, pages = {78 -- 96}, year = {2016}, abstract = {Der verbreiteten Annahme einer st{\"a}ndigen Gewaltzunahme an Schulen stehen bisher nur wenige Studien im Zeitvergleich gegen{\"u}ber. Der vorliegende Beitrag will diese L{\"u}cke schließen, indem er Ergebnisse einer aktuellen Replikationsstudie vorstellt und damit die Frage beantwortet, ob die Gewalt an Schulen im Vergleich zur Mitte der 1990er Jahre zu- oder abgenommen hat. Anhand einer repr{\"a}sentativen s{\"a}chsischen Stichprobe zeigt sich, dass im Jahr 2014 im Vergleich zu 1996 {\"u}ber weniger Gewalt an Schulen berichtet wird. Dies betrifft die Gewalt unter Sch{\"u} ler(inne)n und die Gewalt gegen Lehrkr{\"a}fte. Parallel hat die Interventionsbereitschaft unter der Lehrer- und Sch{\"u}lerschaft zugenommen. Zugleich macht die Studie auf differente Entwicklungstrends zwischen den Sch{\"u}lergruppen aufmerksam. Trotz eines insgesamt niedrigen Gewaltniveaus im Vergleich zur Mitte der 1990er Jahre legen die Befunde den Schluss nahe, bei den Pr{\"a}ventionsbem{\"u}hungen nicht nachzulassen. Veryfew studies have investigated the widely held assumption that violence in schools has constantly increased in recent years. The current study aims to fill this gap by presenting results of a recent replication study in Germany, as well as answering the question as to whether violence in schools increased or decreased in comparison with the mid-1990s. Based on a representative sample of Saxon students, this study shows that less violence was reported in schools in 2014 compared to 1996. This relates to both violence among students and their violent actions against teachers. Moreover, the willingness of teachers and students to intervene has increased. At the same time, this study draws attention to developmental trends between groups of students. Despite a general low level of violence in schools compared to the mid-1990s, the findings suggest that prevention efforts must be continued.}, language = {de} } @phdthesis{Niess2016, author = {Nieß, G{\"u}nther}, title = {Modellierung und Erkennung von technischen Fehlern mittels linearer und nichtlinearer Codes}, school = {Universit{\"a}t Potsdam}, pages = {V, 97}, year = {2016}, language = {de} } @phdthesis{Nietzsche2016, author = {Nietzsche, Madlen}, title = {Identifizierung und Charakterisierung neuer Komponenten der SnRK1-Signaltransduktion in Arabidopsis thaliana}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-98678}, school = {Universit{\"a}t Potsdam}, pages = {xi, 182}, year = {2016}, abstract = {F{\"u}r alle Organismen ist die Aufrechterhaltung ihres energetischen Gleichgewichts unter fluktuierenden Umweltbedingungen lebensnotwendig. In Eukaryoten steuern evolution{\"a}r konservierte Proteinkinasen, die in Pflanzen als SNF1-RELATED PROTEIN KINASE1 (SnRK1) bezeichnet werden, die Adaption an Stresssignale aus der Umwelt und an die Limitierung von N{\"a}hrstoffen und zellul{\"a}rer Energie. Die Aktivierung von SnRK1 bedingt eine umfangreiche transkriptionelle Umprogrammierung, die allgemein zu einer Repression energiekonsumierender Prozesse wie beispielsweise Zellteilung und Proteinbiosynthese und zu einer Induktion energieerzeugender, katabolischer Stoffwechselwege f{\"u}hrt. Wie unterschiedliche Signale zu einer generellen sowie teilweise gewebe- und stressspezifischen SnRK1-vermittelten Antwort f{\"u}hren ist bisher noch nicht ausreichend gekl{\"a}rt, auch weil bislang nur wenige Komponenten der SnRK1-Signaltransduktion identifiziert wurden. In dieser Arbeit konnte ein Protein-Protein-Interaktionsnetzwerk um die SnRK1αUntereinheiten aus Arabidopsis AKIN10/AKIN11 etabliert werden. Dadurch wurden zun{\"a}chst Mitglieder der pflanzenspezifischen DUF581-Proteinfamilie als Interaktionspartner der SnRK1α-Untereinheiten identifiziert. Diese Proteine sind {\"u}ber ihre konservierte DUF581Dom{\"a}ne, in der ein Zinkfinger-Motiv lokalisiert ist, f{\"a}hig mit AKIN10/AKIN11 zu interagieren. In planta Ko-Expressionsanalysen zeigten, dass die DUF581-Proteine eine Verschiebung der nucleo-cytoplasmatischen Lokalisierung von AKIN10 hin zu einer nahezu ausschließlichen zellkernspezifischen Lokalisierung beg{\"u}nstigen sowie die Ko-Lokalisierung von AKIN10 und DUF581-Proteinen im Nucleus. In Bimolekularen Fluoreszenzkomplementations-Analysen konnte die zellkernspezifische Interaktion von DUF581-Proteinen mit SnRK1α-Untereinheiten in planta best{\"a}tigt werden. Außerhalb der DUF581-Dom{\"a}ne weisen die Proteine einander keine große Sequenz{\"a}hnlichkeit auf. Aufgrund ihrer F{\"a}higkeit mit SnRK1 zu interagieren, dem Fehlen von SnRK1Phosphorylierungsmotiven sowie ihrer untereinander sehr variabler gewebs-, entwicklungs- und stimulusspezifischer Expression wurde f{\"u}r DUF581-Proteine eine Funktion als Adaptoren postuliert, die unter bestimmten physiologischen Bedingungen spezifische Substratproteine in den SnRK1-Komplex rekrutieren. Auf diese Weise k{\"o}nnten DUF581Proteine die Interaktion von SnRK1 mit deren Zielproteinen modifizieren und eine Feinjustierung der SnRK1-Signalweiterleitung erm{\"o}glichen. Durch weiterf{\"u}hrende Interaktionsstudien konnten DUF581-interagierende Proteine darunter Transkriptionsfaktoren, Proteinkinasen sowie regulatorische Proteine gefunden werden, die teilweise ebenfalls Wechselwirkungen mit SnRK1α-Untereinheiten aufzeigten. Im Rahmen dieser Arbeit wurde eines dieser Proteine f{\"u}r das eine Beteiligung an der SnRK1Signalweiterleitung als Transkriptionsregulator vermutet wurde n{\"a}her charakterisiert. STKR1 (STOREKEEPER RELATED 1), ein spezifischer Interaktionspartner von DUF581-18, geh{\"o}rt zu einer pflanzenspezifischen Leucin-Zipper-Transkriptionsfaktorfamilie und interagiert in Hefe sowie in planta mit SnRK1. Die zellkernspezifische Interaktion von STKR1 und AKIN10 in Pflanzen unterst{\"u}tzt die Vermutung der kooperativen Regulation von Zielgenen. Weiterhin stabilisierte die Anwesenheit von AKIN10 die Proteingehalte von STKR1, das wahrscheinlich {\"u}ber das 26S Proteasom abgebaut wird. Da es sich bei STKR1 um ein Phosphoprotein mit SnRK1-Phosphorylierungsmotiv handelt, stellt es sehr wahrscheinlich ein SnRK1-Substrat dar. Allerdings konnte eine SnRK1-vermittelte Phosphorylierung von STKR1 in dieser Arbeit nicht gezeigt werden. Der Verlust von einer Phosphorylierungsstelle beeinflusste die Homo- und Heterodimerisierungsf{\"a}higkeit von STKR1 in Hefeinteraktionsstudien, wodurch eine erh{\"o}hte Spezifit{\"a}t der Zielgenregulation erm{\"o}glicht werden k{\"o}nnte. Außerdem wurden Arabidopsis-Pflanzen mit einer ver{\"a}nderten STKR1-Expression ph{\"a}notypisch, physiologisch und molekularbiologisch charakterisiert. W{\"a}hrend der Verlust der STKR1-Expression zu Pflanzen f{\"u}hrte, die sich kaum von Wildtyp-Pflanzen unterschieden, bedingte die konstitutive {\"U}berexpression von STKR1 ein stark vermindertes Pflanzenwachstum sowie Entwicklungsverz{\"o}gerungen hinsichtlich der Bl{\"u}hinduktion und Seneszenz {\"a}hnlich wie sie auch bei SnRK1α-{\"U}berexpression beschrieben wurden. Pflanzen dieser Linien waren nicht in der Lage Anthocyane zu akkumulieren und enthielten geringere Gehalte an Chlorophyll und Carotinoiden. Neben einem erh{\"o}hten n{\"a}chtlichen St{\"a}rkeumsatz waren die Pflanzen durch geringere Saccharosegehalte im Vergleich zum Wildtyp gekennzeichnet. Eine Transkriptomanalyse ergab, dass in den STKR1-{\"u}berexprimierenden Pflanzen unter Energiemangelbedingungen, hervorgerufen durch eine verl{\"a}ngerte Dunkelphase, eine gr{\"o}ßere Anzahl an Genen im Vergleich zum Wildtyp differentiell reguliert war als w{\"a}hrend der Lichtphase. Dies spricht f{\"u}r eine Beteiligung von STKR1 an Prozessen, die w{\"a}hrend der verl{\"a}ngerten Dunkelphase aktiv sind. Ein solcher ist beispielsweise die SnRK1-Signaltransduktion, die unter energetischem Stress aktiviert wird. Die STKR1{\"U}berexpression f{\"u}hrte zudem zu einer verst{\"a}rkten transkriptionellen Induktion von Abwehrassoziierten Genen sowie NAC- und WRKY-Transkriptionsfaktoren nach verl{\"a}ngerter Dunkelphase. Die Transkriptomdaten deuteten auf eine stimulusunabh{\"a}ngige Induktion von Abwehrprozessen hin und konnten eine Erkl{\"a}rung f{\"u}r die ph{\"a}notypischen und physiologischen Auff{\"a}lligkeiten der STKR1-{\"U}berexprimierer liefern.}, language = {de} } @article{NietoMorenoRohrmannvanderMeeretal.2016, author = {Nieto-Moreno, Vanesa and Rohrmann, Alexander and van der Meer, Marcel T. J. and Damste, Jaap S. Sinninghe and Sachse, Dirk and Tofelde, Stefanie and Niedermeyer, Eva M. and Strecker, Manfred and Mulch, Andreas}, title = {Elevation-dependent changes in n-alkane delta D and soil GDGTs across the South Central Andes}, series = {Earth \& planetary science letters}, volume = {453}, journal = {Earth \& planetary science letters}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0012-821X}, doi = {10.1016/j.epsl.2016.07.049}, pages = {234 -- 242}, year = {2016}, abstract = {Surface uplift of large plateaus may significantly influence regional climate and more specifically precipitation patterns and temperature, sometimes complicating paleoaltimetry interpretations. Thus, understanding the topographic evolution of tectonically active mountain belts benefits from continued development of reliable proxies to reduce uncertainties in paleoaltimetry reconstructions. Lipid biomarker-based proxies provide a novel approach to stable isotope paleoaltimetry and complement authigenic or pedogenic mineral proxy materials, in particular outside semi-arid climate zones where soil carbonates are not abundant but (soil) organic matter has a high preservation potential. Here we present delta D values of soil-derived n-alkanes and mean annual air temperature (MAT) estimates based on branched glycerol dialkyl glycerol tetraether (brGDGT) distributions to assess their potential for paleoelevation reconstructions in the southern central Andes. We analyzed soil samples across two environmental and hydrological gradients that include a hillslope (26-28 degrees S) and a valley (22-24 degrees S) transect on the windward flanks of Central Andean Eastern Cordillera in NW Argentina. Our results show that present-day n-alkane delta D values and brGDGT-based MAT estimates are both linearly related with elevation and in good agreement with present-day climate conditions. Soil n-alkanes show a delta D lapse rate (A(delta D)) of -1.64 parts per thousand/100 m (R-2 = 0.91, p < 0.01) at the hillslope transect, within the range of delta D lapse rates from precipitation and surface waters in other tropical regions in the Andes like the Eastern Cordillera in Colombia and Bolivia and the Equatorial and Peruvian Andes. BrGDGT-derived soil temperatures are similar to monitored winter temperatures in the region and show a lapse rate of Delta T = -0.51 degrees C/100 m (R-2 = 0.91, p < 0.01), comparable with lapse rates from in situ soil temperature measurements, satellite derived land-surface temperatures at this transect, and weather stations from the Eastern Cordillera at similar latitude. As a result of an increasing leeward sampling position along the valley transect lapse rates are biased towards lower values and display higher scatter (Delta(delta D) = -0.9 parts per thousand/100 m, R-2 = 0.76, p < 0.01 and Delta T = -0.19 degrees C/100 m, R-2 = 0.48, p < 0.05). Despite this higher complexity, they are in line with lapse rates from stream-water samples and in situ soil temperature measurements along the same transect. Our results demonstrate that both soil n-alkane delta D values and MAT reconstructions based on brGDGTs distributions from the hillslope transect (Delta(delta D) = -1.64 parts per thousand/100 m, R-2 = 0.91, p < 0.01 and Delta T = -0.51 degrees C/100 m, R-2 = 0.91, p < 0.01) track the direct effects of orography on precipitation and temperature and hence the combined effects of local and regional hydrology as well as elevation. (C) 2016 Elsevier B.V. All rights reserved.}, language = {en} } @phdthesis{Niemeyer2016, author = {Niemeyer, Bastian}, title = {Vegetation reconstruction and assessment of plant diversity at the treeline ecotone in northern Siberia}, school = {Universit{\"a}t Potsdam}, pages = {146}, year = {2016}, language = {en} } @article{NiehoffSchulzSoltwischetal.2016, author = {Niehoff, Ann-Christin and Schulz, Jacqueline and Soltwisch, Jens and Meyer, Soren and Kettling, Hans and Sperling, Michael and Jeibmann, Astrid and Dreisewerd, Klaus and Francesconi, Kevin A. and Schwerdtle, Tanja and Karst, Uwe}, title = {Imaging by Elemental and Molecular Mass Spectrometry Reveals the Uptake of an Arsenolipid in the Brain of Drosophila melanogaster}, series = {Analytical chemistry}, volume = {88}, journal = {Analytical chemistry}, publisher = {American Chemical Society}, address = {Washington}, issn = {0003-2700}, doi = {10.1021/acs.analchem.6b00333}, pages = {5258 -- 5263}, year = {2016}, abstract = {Arsenic-containing lipids (arsenolipids) are natural products of marine organisms such as fish, invertebrates, and algae, many of which are important seafoods. A major group of arsenolipids, namely, the arsenic-containing hydrocarbons (AsHC), have recently been shown to be cytotoxic to human liver and bladder cells, a result that has stimulated interest in the chemistry and toxicology of these compounds. In this study, elemental laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) and molecular matrix-assisted laser desorption/ionization (MALDI-)MS were used to image and quantify the uptake of an AsHC in the model organism Drosophila melanogaster. Using these two complementary methods, both an enrichment of arsenic and the presence of the AsHC in the brain were revealed, indicating that the intact arsenolipid had crossed the blood-brain barrier. Simultaneous acquisition of quantitative elemental concentrations and molecular distributions could allow new insight into organ-specific enrichment and possible transportation processes of arsenic-containing bioactive compounds in living organisms.}, language = {en} } @misc{NiedlBerensteinBeta2016, author = {Niedl, Robert Raimund and Berenstein, Igal and Beta, Carsten}, title = {How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95810}, pages = {6451 -- 6457}, year = {2016}, abstract = {In this paper, we show experimentally that inside a microfluidic device, where the reactants are segregated, the reaction rate of an autocatalytic clock reaction is accelerated in comparison to the case where all the reactants are well mixed. We also find that, when mixing is enhanced inside the microfluidic device by introducing obstacles into the flow, the clock reaction becomes slower in comparison to the device where mixing is less efficient. Based on numerical simulations, we show that this effect can be explained by the interplay of nonlinear reaction kinetics (cubic autocatalysis) and differential diffusion, where the autocatalytic species diffuses slower than the substrate.}, language = {en} } @article{NiedlBerensteinBeta2016, author = {Niedl, Robert Raimund and Berenstein, Igal and Beta, Carsten}, title = {How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels}, series = {Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies}, volume = {18}, journal = {Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1463-9076}, doi = {10.1039/c6cp00224b}, pages = {6451 -- 6457}, year = {2016}, abstract = {In this paper, we show experimentally that inside a microfluidic device, where the reactants are segregated, the reaction rate of an autocatalytic clock reaction is accelerated in comparison to the case where all the reactants are well mixed. We also find that, when mixing is enhanced inside the microfluidic device by introducing obstacles into the flow, the clock reaction becomes slower in comparison to the device where mixing is less efficient. Based on numerical simulations, we show that this effect can be explained by the interplay of nonlinear reaction kinetics (cubic autocatalysis) and differential diffusion, where the autocatalytic species diffuses slower than the substrate.}, language = {en} } @misc{NiedererVogtWippertetal.2016, author = {Niederer, Daniel and Vogt, Lutz and Wippert, Pia-Maria and Puschmann, Anne-Katrin and Pfeifer, Ann-Christin and Schiltenwolf, Marcus and Banzer, Winfried and Mayer, Frank}, title = {Medicine in spine exercise (MiSpEx) for nonspecific low back pain patients}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {444}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-407308}, pages = {9}, year = {2016}, abstract = {Background: Arising from the relevance of sensorimotor training in the therapy of nonspecific low back pain patients and from the value of individualized therapy, the present trial aims to test the feasibility and efficacy of individualized sensorimotor training interventions in patients suffering from nonspecific low back pain. Methods and study design: A multicentre, single-blind two-armed randomized controlled trial to evaluate the effects of a 12-week (3 weeks supervised centre-based and 9 weeks home-based) individualized sensorimotor exercise program is performed. The control group stays inactive during this period. Outcomes are pain, and pain-associated function as well as motor function in adults with nonspecific low back pain. Each participant is scheduled to five measurement dates: baseline (M1), following centre-based training (M2), following home-based training (M3) and at two follow-up time points 6 months (M4) and 12 months (M5) after M1. All investigations and the assessment of the primary and secondary outcomes are performed in a standardized order: questionnaires - clinical examination - biomechanics (motor function). Subsequent statistical procedures are executed after the examination of underlying assumptions for parametric or rather non-parametric testing. Discussion: The results and practical relevance of the study will be of clinical and practical relevance not only for researchers and policy makers but also for the general population suffering from nonspecific low back pain. Trial registration: Identification number DRKS00010129. German Clinical Trial registered on 3 March 2016.}, language = {en} } @article{NiedererVogtWippertetal.2016, author = {Niederer, Daniel and Vogt, Lutz and Wippert, Pia-Maria and Puschmann, Anne-Katrin and Pfeifer, Ann-Christin and Schiltenwolf, Marcus and Banzer, Winfried and Mayer, Frank}, title = {Medicine in spine exercise (MiSpEx) for nonspecific low back pain patients: study protocol for a multicentre, single-blind randomized controlled trial}, series = {Trials}, volume = {17}, journal = {Trials}, publisher = {BioMed Central}, address = {London}, issn = {1745-6215}, doi = {10.1186/s13063-016-1645-1}, pages = {9}, year = {2016}, abstract = {Background: Arising from the relevance of sensorimotor training in the therapy of nonspecific low back pain patients and from the value of individualized therapy, the present trial aims to test the feasibility and efficacy of individualized sensorimotor training interventions in patients suffering from nonspecific low back pain. Methods and study design: A multicentre, single-blind two-armed randomized controlled trial to evaluate the effects of a 12-week (3 weeks supervised centre-based and 9 weeks home-based) individualized sensorimotor exercise program is performed. The control group stays inactive during this period. Outcomes are pain, and pain-associated function as well as motor function in adults with nonspecific low back pain. Each participant is scheduled to five measurement dates: baseline (M1), following centre-based training (M2), following home-based training (M3) and at two follow-up time points 6 months (M4) and 12 months (M5) after M1. All investigations and the assessment of the primary and secondary outcomes are performed in a standardized order: questionnaires - clinical examination biomechanics (motor function). Subsequent statistical procedures are executed after the examination of underlying assumptions for parametric or rather non-parametric testing. Discussion: The results and practical relevance of the study will be of clinical and practical relevance not only for researchers and policy makers but also for the general population suffering from nonspecific low back pain.}, language = {en} } @phdthesis{Nied2016, author = {Nied, Manuela}, title = {The role of soil moisture and weather patterns for flood occurrence and characteristics at the river basin scale}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-94612}, school = {Universit{\"a}t Potsdam}, pages = {XVI, 86}, year = {2016}, abstract = {Flood generation at the scale of large river basins is triggered by the interaction of the hydrological pre-conditions and the meteorological event conditions at different spatial and temporal scales. This interaction controls diverse flood generating processes and results in floods varying in magnitude and extent, duration as well as socio-economic consequences. For a process-based understanding of the underlying cause-effect relationships, systematic approaches are required. These approaches have to cover the complete causal flood chain, including the flood triggering meteorological event in combination with the hydrological (pre-)conditions in the catchment, runoff generation, flood routing, possible floodplain inundation and finally flood losses. In this thesis, a comprehensive probabilistic process-based understanding of the causes and effects of floods is advanced. The spatial and temporal dynamics of flood events as well as the geophysical processes involved in the causal flood chain are revealed and the systematic interconnections within the flood chain are deciphered by means of the classification of their associated causes and effects. This is achieved by investigating the role of the hydrological pre-conditions and the meteorological event conditions with respect to flood occurrence, flood processes and flood characteristics as well as their interconnections at the river basin scale. Broadening the knowledge about flood triggers, which up to now has been limited to linking large-scale meteorological conditions to flood occurrence, the influence of large-scale pre-event hydrological conditions on flood initiation is investigated. Using the Elbe River basin as an example, a classification of soil moisture, a key variable of pre-event conditions, is developed and a probabilistic link between patterns of soil moisture and flood occurrence is established. The soil moisture classification is applied to continuously simulated soil moisture data which is generated using the semi-distributed conceptual rainfall-runoff model SWIM. Applying successively a principal component analysis and a cluster analysis, days of similar soil moisture patterns are identified in the period November 1951 to October 2003. The investigation of flood triggers is complemented by including meteorological conditions described by a common weather pattern classification that represents the main modes of atmospheric state variability. The newly developed soil moisture classification thereby provides the basis to study the combined impact of hydrological pre-conditions and large-scale meteorological event conditions on flood occurrence at the river basin scale. A process-based understanding of flood generation and its associated probabilities is attained by classifying observed flood events into process-based flood types such as snowmelt floods or long-rain floods. Subsequently, the flood types are linked to the soil moisture and weather patterns. Further understanding of the processes is gained by modeling of the complete causal flood chain, incorporating a rainfall-runoff model, a 1D/2D hydrodynamic model and a flood loss model. A reshuffling approach based on weather patterns and the month of their occurrence is developed to generate synthetic data fields of meteorological conditions, which drive the model chain, in order to increase the flood sample size. From the large number of simulated flood events, the impact of hydro-meteorological conditions on various flood characteristics is detected through the analysis of conditional cumulative distribution functions and regression trees. The results show the existence of catchment-scale soil moisture patterns, which comprise of large-scale seasonal wetting and drying components as well as of smaller-scale variations related to spatially heterogeneous catchment processes. Soil moisture patterns frequently occurring before the onset of floods are identified. In winter, floods are initiated by catchment-wide high soil moisture, whereas in summer the flood-initiating soil moisture patterns are diverse and the soil moisture conditions are less stable in time. The combined study of both soil moisture and weather patterns shows that the flood favoring hydro-meteorological patterns as well as their interactions vary seasonally. In the analysis period, 18 \% of the weather patterns only result in a flood in the case of preceding soil saturation. The classification of 82 past events into flood types reveals seasonally varying flood processes that can be linked to hydro-meteorological patterns. For instance, the highest flood potential for long-rain floods is associated with a weather pattern that is often detected in the presence of so-called 'Vb' cyclones. Rain-on-snow and snowmelt floods are associated with westerly and north-westerly wind directions. The flood characteristics vary among the flood types and can be reproduced by the applied model chain. In total, 5970 events are simulated. They reproduce the observed event characteristics between September 1957 and August 2002 and provide information on flood losses. A regression tree analysis relates the flood processes of the simulated events to the hydro-meteorological (pre-)event conditions and highlights the fact that flood magnitude is primarily controlled by the meteorological event, whereas flood extent is primarily controlled by the soil moisture conditions. Describing flood occurrence, processes and characteristics as a function of hydro-meteorological patterns, this thesis is part of a paradigm shift towards a process-based understanding of floods. The results highlight that soil moisture patterns as well as weather patterns are not only beneficial to a probabilistic conception of flood initiation but also provide information on the involved flood processes and the resulting flood characteristics.}, language = {en} } @phdthesis{Nicolai2016, author = {Nicolai, Johann Nils}, title = {"Seid mutig und aufrecht!"}, series = {Potsdamer j{\"u}dische Studien ; 1}, journal = {Potsdamer j{\"u}dische Studien ; 1}, publisher = {be.bra}, address = {Berlin}, isbn = {978-3-95410-072-9}, school = {Universit{\"a}t Potsdam}, pages = {314}, year = {2016}, abstract = {Der 'Centralverein deutscher Staatsb{\"u}rger j{\"u}dischen Glaubens' (C.V.) wurde 1893 in Berlin gegr{\"u}ndet. Sein T{\"a}tigkeitsschwerpunkt lag urspr{\"u}nglich auf dem Gebiet des Rechtsschutzes gegen antisemitische Diskriminierungen. Eine zweite S{\"a}ule seiner Arbeit war die Aufkl{\"a}rung der Nichtjuden {\"u}ber das 'wahre Wesen' des Judentums. Johann Nicolai analysiert in diesem Band unter Auswertung der Moskauer Archivbest{\"a}nde die Entwicklung des Vereins von 1933 bis zu seiner Aufl{\"o}sung im Jahr 1938. Im Mittelpunkt der Studie steht die Frage, wie der Centralverein die Fortsetzung seiner Arbeit gegen{\"u}ber seinen Mitgliedern begr{\"u}ndete, obwohl im Nationalsozialismus die grundlegenden B{\"u}rgerrechte f{\"u}r die deutschen Juden, die er urspr{\"u}nglich verteidigen wollte, nicht mehr gew{\"a}hrleistet waren. Ein besonderer Fokus liegt auf der Wandlung des Centralvereins nach den N{\"u}rnberger Gesetzen und der darauf erfolgten Umbenennung und Umstrukturierung. Wesentlicher Bestandteil ist auch die Auseinandersetzung mit der j{\"u}dischen Emigration nach {\"U}bersee. Nicolai zeigt auf, dass es bis tief in die 1930er-Jahre hinein starke Spannungen im deutschen Judentum gab.}, language = {de} } @misc{NickersonAtalagdeBonoetal.2016, author = {Nickerson, David and Atalag, Koray and de Bono, Bernard and Geiger, Joerg and Goble, Carole and Hollmann, Susanne and Lonien, Joachim and Mueller, Wolfgang and Regierer, Babette and Stanford, Natalie J. and Golebiewski, Martin and Hunter, Peter}, title = {The Human Physiome: how standards, software and innovative service infrastructures are providing the building blocks to make it achievable}, series = {Interface focus}, volume = {6}, journal = {Interface focus}, publisher = {Royal Society}, address = {London}, issn = {2042-8898}, doi = {10.1098/rsfs.2015.0103}, pages = {57 -- 61}, year = {2016}, abstract = {Reconstructing and understanding the Human Physiome virtually is a complex mathematical problem, and a highly demanding computational challenge. Mathematical models spanning from the molecular level through to whole populations of individuals must be integrated, then personalized. This requires interoperability with multiple disparate and geographically separated data sources, and myriad computational software tools. Extracting and producing knowledge from such sources, even when the databases and software are readily available, is a challenging task. Despite the difficulties, researchers must frequently perform these tasks so that available knowledge can be continually integrated into the common framework required to realize the Human Physiome. Software and infrastructures that support the communities that generate these, together with their underlying standards to format, describe and interlink the corresponding data and computer models, are pivotal to the Human Physiome being realized. They provide the foundations for integrating, exchanging and re-using data and models efficiently, and correctly, while also supporting the dissemination of growing knowledge in these forms. In this paper, we explore the standards, software tooling, repositories and infrastructures that support this work, and detail what makes them vital to realizing the Human Physiome.}, language = {en} } @article{NicenboimVasishth2016, author = {Nicenboim, Bruno and Vasishth, Shravan}, title = {Statistical methods for linguistic research: Foundational Ideas-Part II}, series = {Language and linguistics compass}, volume = {10}, journal = {Language and linguistics compass}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {1749-818X}, doi = {10.1111/lnc3.12207}, pages = {591 -- 613}, year = {2016}, abstract = {We provide an introductory review of Bayesian data analytical methods, with a focus on applications for linguistics, psychology, psycholinguistics, and cognitive science. The empirically oriented researcher will benefit from making Bayesian methods part of their statistical toolkit due to the many advantages of this framework, among them easier interpretation of results relative to research hypotheses and flexible model specification. We present an informal introduction to the foundational ideas behind Bayesian data analysis, using, as an example, a linear mixed models analysis of data from a typical psycholinguistics experiment. We discuss hypothesis testing using the Bayes factor and model selection using cross-validation. We close with some examples illustrating the flexibility of model specification in the Bayesian framework. Suggestions for further reading are also provided.}, language = {en} } @misc{NicenboimLogacevGatteietal.2016, author = {Nicenboim, Bruno and Logacev, Pavel and Gattei, Carolina and Vasishth, Shravan}, title = {When High-Capacity Readers Slow Down and Low-Capacity Readers Speed Up}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-90663}, pages = {1 -- 24}, year = {2016}, abstract = {We examined the effects of argument-head distance in SVO and SOV languages (Spanish and German), while taking into account readers' working memory capacity and controlling for expectation (Levy, 2008) and other factors. We predicted only locality effects, that is, a slowdown produced by increased dependency distance (Gibson, 2000; Lewis and Vasishth, 2005). Furthermore, we expected stronger locality effects for readers with low working memory capacity. Contrary to our predictions, low-capacity readers showed faster reading with increased distance, while high-capacity readers showed locality effects. We suggest that while the locality effects are compatible with memory-based explanations, the speedup of low-capacity readers can be explained by an increased probability of retrieval failure. We present a computational model based on ACT-R built under the previous assumptions, which is able to give a qualitative account for the present data and can be tested in future research. Our results suggest that in some cases, interpreting longer RTs as indexing increased processing difficulty and shorter RTs as facilitation may be too simplistic: The same increase in processing difficulty may lead to slowdowns in high-capacity readers and speedups in low-capacity ones. Ignoring individual level capacity differences when investigating locality effects may lead to misleading conclusions.}, language = {en} } @article{NicenboimLogacevGatteietal.2016, author = {Nicenboim, Bruno and Logacev, Pavel and Gattei, Carolina and Vasishth, Shravan}, title = {When High-Capacity Readers Slow Down and Low-Capacity Readers Speed Up}, series = {Frontiers in psychology}, volume = {7}, journal = {Frontiers in psychology}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2016.00280}, pages = {1 -- 24}, year = {2016}, abstract = {We examined the effects of argument-head distance in SVO and SOV languages (Spanish and German), while taking into account readers' working memory capacity and controlling for expectation (Levy, 2008) and other factors. We predicted only locality effects, that is, a slowdown produced by increased dependency distance (Gibson, 2000; Lewis and Vasishth, 2005). Furthermore, we expected stronger locality effects for readers with low working memory capacity. Contrary to our predictions, low-capacity readers showed faster reading with increased distance, while high-capacity readers showed locality effects. We suggest that while the locality effects are compatible with memory-based explanations, the speedup of low-capacity readers can be explained by an increased probability of retrieval failure. We present a computational model based on ACT-R built under the previous assumptions, which is able to give a qualitative account for the present data and can be tested in future research. Our results suggest that in some cases, interpreting longer RTs as indexing increased processing difficulty and shorter RTs as facilitation may be too simplistic: The same increase in processing difficulty may lead to slowdowns in high-capacity readers and speedups in low-capacity ones. Ignoring individual level capacity differences when investigating locality effects may lead to misleading conclusions.}, language = {en} } @phdthesis{Nicenboim2016, author = {Nicenboim, Bruno}, title = {Dependency resolution as a retrieval process}, school = {Universit{\"a}t Potsdam}, pages = {xiv, 209}, year = {2016}, abstract = {My thesis focused on the predictions of the activation-based model of Lewis and Vasishth (2005) to investigate the evidence for the use of the memory system in the formation of non-local dependencies in sentence comprehension. The activation-based model, which follows the Adaptive Control of Thought-Rational framework (ACT-R; Anderson et al., 2004), has been used to explain locality effects and similarity-based interference by assuming that dependencies are resolved by a cue-based retrieval mechanism, and that the retrieval mechanism is affected by decay and interference. Both locality effects and (inhibitory) similarity-based interference cause increased difficulty (e.g., longer reading times) at the site of the dependency completion where a retrieval is assumed: (I) Locality effects are attributed to the increased difficulty in the retrieval of a dependent when the distance from its retrieval site is increased. (II) Similarity-based interference is attributed to the retrieval being affected by the presence of items which have similar features as the dependent that needs to be retrieved. In this dissertation, I investigated some findings problematic to the activation-based model, namely, facilitation where locality effects are expected (e.g., Levy, 2008), and the lack of similarity-based interference from the number feature in grammatical sentences (e.g., Wagers et al., 2009). In addition, I used individual differences in working memory capacity and reading fluency as a way to validate the theories investigated (Underwood, 1975), and computational modeling to achieve a more precise account of the phenomena. Regarding locality effects, by using self-paced reading and eye-tracking-while reading methods with Spanish and German data, this dissertation yielded two main findings: (I) Locality effects seem to be modulated by working memory capacity, with high-capacity participants showing expectation-driven facilitation. (II) Once expectations and other potential confounds are controlled using baselines, with increased distance, high-capacity readers can show a slow-down (i.e., locality effects) and low-capacity readers can show a speedup. While the locality effects are compatible with the activation-based model, simulations show that the speedup of low-capacity readers can only be accounted for by changing some of the assumptions of the activation-based model. Regarding similarity-based interference, two relatively high-powered self-paced reading experiments in German using grammatical sentences yielded a slowdown at the verb as predicted by the activation-based model. This provides evidence in favor of dependency creation via cue-based retrieval, and in contrast with the view that cue-based retrieval is a reanalysis mechanism (Wagers et al., 2009). Finally, the same experimental results that showed inhibitory interference from the number feature are used for a finer grain evaluation of the retrieval process. Besides Lewis and Vasishth's (2005) activation-based model, also McElree's (2000) direct-access model can account for inhibitory interference. These two models assume a cue-based retrieval mechanism to build dependencies, but they are based on different assumptions. I present a computational evaluation of the predictions of these two theories of retrieval. The models were compared by implementing them in a Bayesian hierarchical framework. The evaluation of the models reveals that some aspects of the data fit better under the direct access model than under the activation-based model. However, a simple extension of the activation-based model provides a comparable fit to the direct access model. This serves as a proof of concept showing potential ways to improve the original activation-based model. In conclusion, this thesis adds to the body of evidence that argues for the use of the general memory system in dependency resolution, and in particular for a cue-based retrieval mechanism. However, it also shows that some of the default assumptions inherited from ACT-R in the activation-based model need to be revised.}, language = {en} } @article{NeumannNieswandSchubert2016, author = {Neumann, Anne and Nieswand, Maria and Schubert, Torben}, title = {Estimating alternative technology sets in nonparametric efficiency analysis: restriction tests for panel and clustered data}, series = {Journal of productivity analysis}, volume = {45}, journal = {Journal of productivity analysis}, publisher = {Springer}, address = {Dordrecht}, issn = {0895-562X}, doi = {10.1007/s11123-015-0461-z}, pages = {35 -- 51}, year = {2016}, abstract = {Nonparametric efficiency analysis has become a widely applied technique to support industrial bench-marking as well as a variety of incentive-based regulation policies. In practice such exercises are often plagued by incomplete knowledge about the correct specifications of inputs and outputs. Simar and Wilson (Commun Stat Simul Comput 30(1): 159-184, 2001) and Schubert and Simar (J Prod Anal 36(1): 55-69, 2011) propose restriction tests to support such specification decisions for cross-section data. However, the typical oligopolized market structure pertinent to regulation contexts often leads to low numbers of cross-section observations, rendering reliable estimation based on these tests practically unfeasible. This small-sample problem could often be avoided with the use of panel data, which would in any case require an extension of the cross-section restriction tests to handle panel data. In this paper we derive these tests. We prove the consistency of the proposed method and apply it to a sample of US natural gas transmission companies from 2003 through 2007. We find that the total quantity of natural gas delivered and natural gas delivered in peak periods measure essentially the same output. Therefore only one needs to be included. We also show that the length of mains as a measure of transportation service is non-redundant and therefore must be included.}, language = {en} } @misc{NeugebauerSchwabWaldmannetal.2016, author = {Neugebauer, Ina and Schwab, M. J. and Waldmann, Nicolas D. and Tjallingii, Rik and Frank, U. and Hadzhiivanova, E. and Naumann, R. and Taha, N. and Agnon, Amotz and Enzel, Y. and Brauer, Achim}, title = {Hydroclimatic variability in the Levant during the early last glacial (similar to 117-75 ka) derived from micro-facies analyses of deep Dead Sea sediments}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {549}, issn = {1866-8372}, doi = {10.25932/publishup-41187}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-411879}, pages = {16}, year = {2016}, abstract = {The new sediment record from the deep Dead Sea basin (ICDP core 5017-1) provides a unique archive for hydroclimatic variability in the Levant. Here, we present high-resolution sediment facies analysis and elemental composition by micro-X-ray fluorescence (mu XRF) scanning of core 5017-1 to trace lake levels and responses of the regional hydroclimatology during the time interval from ca. 117 to 75 ka, i. e. the transition between the last interglacial and the onset of the last glaciation. We distinguished six major micro-facies types and interpreted these and their alterations in the core in terms of relative lake level changes. The two end-member facies for highest and lowest lake levels are (a) up to several metres thick, greenish sediments of alternating aragonite and detrital marl laminae (aad) and (b) thick halite facies, respectively. Intermediate lake levels are characterised by detrital marls with varying amounts of aragonite, gypsum or halite, reflecting lower-amplitude, shorter-term variability. Two intervals of pronounced lake level drops occurred at similar to 110-108 +/- 5 and similar to 93-87 +/- 7 ka. They likely coincide with stadial conditions in the central Mediterranean (Melisey I and II pollen zones in Monticchio) and low global sea levels during Marine Isotope Stage (MIS) 5d and 5b. However, our data do not support the current hypothesis of an almost complete desiccation of the Dead Sea during the earlier of these lake level low stands based on a recovered gravel layer. Based on new petrographic analyses, we propose that, although it was a low stand, this well-sorted gravel layer may be a vestige of a thick turbidite that has been washed out during drilling rather than an in situ beach deposit. Two intervals of higher lake stands at similar to 108-93 +/- 6 and similar to 87-75 +/- 7 ka correspond to interstadial conditions in the central Mediterranean, i. e. pollen zones St. Germain I and II in Monticchio, and Greenland interstadials (GI) 24+23 and 21 in Greenland, as well as to sapropels S4 and S3 in the Mediterranean Sea. These apparent correlations suggest a close link of the climate in the Levant to North Atlantic and Mediterranean climates during the time of the build-up of Northern Hemisphere ice shields in the early last glacial period.}, language = {en} } @article{NeugebauerSchwabWaldmannetal.2016, author = {Neugebauer, I. and Schwab, M. J. and Waldmann, N. D. and Tjallingii, Rik and Frank, U. and Hadzhiivanova, E. and Naumann, R. and Taha, N. and Agnon, A. and Enzel, Y. and Brauer, Achim}, title = {Hydroclimatic variability in the Levant during the early last glacial (similar to 117-75 ka) derived from micro-facies analyses of deep Dead Sea sediments}, series = {Climate of the past : an interactive open access journal of the European Geosciences Union}, volume = {12}, journal = {Climate of the past : an interactive open access journal of the European Geosciences Union}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1814-9324}, doi = {10.5194/cp-12-75-2016}, pages = {75 -- 90}, year = {2016}, abstract = {The new sediment record from the deep Dead Sea basin (ICDP core 5017-1) provides a unique archive for hydroclimatic variability in the Levant. Here, we present high-resolution sediment facies analysis and elemental composition by micro-X-ray fluorescence (mu XRF) scanning of core 5017-1 to trace lake levels and responses of the regional hydroclimatology during the time interval from ca. 117 to 75 ka, i. e. the transition between the last interglacial and the onset of the last glaciation. We distinguished six major micro-facies types and interpreted these and their alterations in the core in terms of relative lake level changes. The two end-member facies for highest and lowest lake levels are (a) up to several metres thick, greenish sediments of alternating aragonite and detrital marl laminae (aad) and (b) thick halite facies, respectively. Intermediate lake levels are characterised by detrital marls with varying amounts of aragonite, gypsum or halite, reflecting lower-amplitude, shorter-term variability. Two intervals of pronounced lake level drops occurred at similar to 110-108 +/- 5 and similar to 93-87 +/- 7 ka. They likely coincide with stadial conditions in the central Mediterranean (Melisey I and II pollen zones in Monticchio) and low global sea levels during Marine Isotope Stage (MIS) 5d and 5b. However, our data do not support the current hypothesis of an almost complete desiccation of the Dead Sea during the earlier of these lake level low stands based on a recovered gravel layer. Based on new petrographic analyses, we propose that, although it was a low stand, this well-sorted gravel layer may be a vestige of a thick turbidite that has been washed out during drilling rather than an in situ beach deposit. Two intervals of higher lake stands at similar to 108-93 +/- 6 and similar to 87-75 +/- 7 ka correspond to interstadial conditions in the central Mediterranean, i. e. pollen zones St. Germain I and II in Monticchio, and Greenland interstadials (GI) 24+23 and 21 in Greenland, as well as to sapropels S4 and S3 in the Mediterranean Sea. These apparent correlations suggest a close link of the climate in the Levant to North Atlantic and Mediterranean climates during the time of the build-up of Northern Hemisphere ice shields in the early last glacial period.}, language = {en} } @article{NehringRaflerZessin2016, author = {Nehring, Benjamin and Rafler, Mathias and Zessin, Hans}, title = {Splitting-characterizations of the Papangelou process}, series = {Mathematische Nachrichten}, volume = {289}, journal = {Mathematische Nachrichten}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0025-584X}, doi = {10.1002/mana.201400384}, pages = {85 -- 96}, year = {2016}, abstract = {For point processes we establish a link between integration-by-parts-and splitting-formulas which can also be considered as integration-by-parts-formulas of a new type. First we characterize finite Papangelou processes in terms of their splitting kernels. The main part then consists in extending these results to the case of infinitely extended Papangelou and, in particular, Polya and Gibbs processes. (C) 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim}, language = {en} } @article{NeherKniepertElimelechetal.2016, author = {Neher, Dieter and Kniepert, Juliane and Elimelech, Arik and Koster, L. Jan Anton}, title = {A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents}, series = {Scientific reports}, volume = {6}, journal = {Scientific reports}, publisher = {Nature Publ. Group}, address = {London}, issn = {2045-2322}, doi = {10.1038/srep24861}, pages = {E2348 -- E2349}, year = {2016}, abstract = {Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit a to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.}, language = {en} } @misc{NeherKniepertElimelechetal.2016, author = {Neher, Dieter and Kniepert, Juliane and Elimelech, Arik and Koster, L. Jan Anton}, title = {A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-91414}, pages = {9}, year = {2016}, abstract = {Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit α to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.}, language = {en} } @article{NeherKniepertElimelechetal.2016, author = {Neher, Dieter and Kniepert, Juliane and Elimelech, Arik and Koster, L. Jan Anton}, title = {A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents}, series = {Scientific reports}, volume = {6}, journal = {Scientific reports}, publisher = {Nature Publishing Group}, address = {London}, issn = {2045-2322}, doi = {10.1038/srep24861}, pages = {9}, year = {2016}, abstract = {Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit α to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.}, language = {en} } @article{NegretePumirHsuetal.2016, author = {Negrete, Jose and Pumir, Alain and Hsu, Hsin-Fang and Westendorf, Christian and Tarantola, Marco and Beta, Carsten and Bodenschatz, Eberhard}, title = {Noisy Oscillations in the Actin Cytoskeleton of Chemotactic Amoeba}, series = {Physical review letters}, volume = {117}, journal = {Physical review letters}, publisher = {American Physical Society}, address = {College Park}, issn = {0031-9007}, doi = {10.1103/PhysRevLett.117.148102}, pages = {5}, year = {2016}, abstract = {Biological systems with their complex biochemical networks are known to be intrinsically noisy. Here we investigate the dynamics of actin polymerization of amoeboid cells, which are close to the onset of oscillations. We show that the large phenotypic variability in the polymerization dynamics can be accurately captured by a generic nonlinear oscillator model in the presence of noise. We determine the relative role of the noise with a single dimensionless, experimentally accessible parameter, thus providing a quantitative description of the variability in a population of cells. Our approach, which rests on a generic description of a system close to a Hopf bifurcation and includes the effect of noise, can characterize the dynamics of a large class of noisy systems close to an oscillatory instability.}, language = {en} } @article{NegraChaabeneHammamietal.2016, author = {Negra, Yassine and Chaabene, Helmi and Hammami, Mehrez and Hachana, Younes and Granacher, Urs}, title = {EFFECTS OF HIGH-VELOCITY RESISTANCE TRAINING ON ATHLETIC PERFORMANCE IN PREPUBERAL MALE SOCCER ATHLETES}, series = {Journal of strength and conditioning research : the research journal of the NSCA}, volume = {30}, journal = {Journal of strength and conditioning research : the research journal of the NSCA}, publisher = {Wiley-Blackwell}, address = {Philadelphia}, issn = {1064-8011}, doi = {10.1519/JSC.0000000000001433}, pages = {3290 -- 3297}, year = {2016}, abstract = {The aim of this study was to assess the effectiveness of a 12-week in-season low-to-moderate load high-velocity resistance training (HVRT) in addition to soccer training as compared with soccer training only on proxies of athletic performance in prepubertal soccer players. Twenty-four male soccer players performed 2 different protocols: (a) regular soccer training with 5 sessions per week (n = 11; age = 12.7 +/- 0.3 years) and (b) regular soccer training with 3 sessions per week and HVRT with 2 sessions per week (n = 13; age = 12.8 +/- 0.2 years). The outcome measures included tests for the assessment of muscle strength (e.g., 1 repetition maximum [1RM] half-squat tests), jump ability (e.g., countermovement jump, squat jump [SJ], standing long jump [SLJ], and multiple 5-bound tests [MB5s]), linear speed (e.g., 5-, 10-, 20-, and 30-m sprint tests), and change of direction (e.g., T-test and Illinois change of direction test). Results revealed significant group 3 test interactions for the SJ test (p <= 0.05, d = 0.59) and the SLJ test (p < 0.01, d = 0.83). Post hoc tests illustrated significant pre-post changes in the HVRT group (SJ: Delta 22\%, p < 0.001, d = 1.26; SLJ: Delta 15\%, p < 0.001, d = 1.30) but not in the control group. In addition, tendencies toward significant interaction effects were found for the 1RM half-squat (p = 0.08, d = 0.54) and the 10-m sprint test (p = 0.06, d = 0.57). Significant pre-post changes were found for both parameters in the HVRT group only (1RM: Delta 25\%, p < 0.001, d = 1.23; 10-m sprint: Delta 7\%, p < 0.0001, d = 1.47). In summary, in-season low-to-moderate load HVRT conducted in combination with regular soccer training is a safe and feasible intervention that has positive effects on maximal strength, vertical and horizontal jump and sprint performance as compared with soccer training only.}, language = {en} } @article{Neca2016, author = {Neca, Łukasz}, title = {Trauma, Lagerliteratur und die Arbeit an der Bedeutung}, series = {Grenzr{\"a}ume - Grenzbewegungen : Ergebnisse der Arbeitstreffen des Jungen Forums Slavistische Literaturwissenschaft in Basel 2013 und Frankfurt (Oder) und Słubice 2014 ; Bd. 2}, volume = {2}, journal = {Grenzr{\"a}ume - Grenzbewegungen : Ergebnisse der Arbeitstreffen des Jungen Forums Slavistische Literaturwissenschaft in Basel 2013 und Frankfurt (Oder) und Słubice 2014 ; Bd. 2}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-359-6}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-93084}, pages = {207 -- 219}, year = {2016}, language = {de} } @misc{NazziPoltrockVonHolzen2016, author = {Nazzi, Thierry and Poltrock, Silvana and Von Holzen, Katie}, title = {The developmental origins of the consonant bias in lexical processing}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {416}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-405322}, pages = {6}, year = {2016}, abstract = {Consonants have been proposed to carry more of the weight of lexical processing than vowels. This consonant bias has consistently been found in adults and has been proposed to facilitate early language acquisition. We explore the origins of this bias over the course of development and in infants learning different languages. Although the consonant bias was originally thought to be present at birth, evidence suggests that it arises from the early stages of phonological and (pre-)lexical acquisition. We discuss two theories that account for the acquisition of the consonant bias: the lexical and acoustic-phonetic hypotheses.}, language = {en} } @article{NazziPoltrockVonHolzen2016, author = {Nazzi, Thierry and Poltrock, Silvana and Von Holzen, Katie}, title = {The Developmental Origins of the Consonant Bias in Lexical Processing}, series = {Current directions in psychological science}, volume = {25}, journal = {Current directions in psychological science}, publisher = {Sage Publ.}, address = {Thousand Oaks}, issn = {0963-7214}, doi = {10.1177/0963721416655786}, pages = {291 -- 296}, year = {2016}, abstract = {Consonants have been proposed to carry more of the weight of lexical processing than vowels. This consonant bias has consistently been found in adults and has been proposed to facilitate early language acquisition. We explore the origins of this bias over the course of development and in infants learning different languages. Although the consonant bias was originally thought to be present at birth, evidence suggests that it arises from the early stages of phonological and (pre-)lexical acquisition. We discuss two theories that account for the acquisition of the consonant bias: the lexical and acoustic-phonetic hypotheses.}, language = {en} } @misc{NavarroRetamalBremerAlzateMoralesetal.2016, author = {Navarro-Retamal, Carlos and Bremer, Anne and Alzate-Morales, Jans H. and Caballero, Julio and Hincha, Dirk K. and Gonz{\´a}lez, Wendy and Thalhammer, Anja}, title = {Molecular dynamics simulations and CD spectroscopy reveal hydration-induced unfolding of the intrinsically disordered LEA proteins COR15A and COR15B from Arabidopsis thaliana}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-394503}, pages = {25806 -- 25816}, year = {2016}, abstract = {The LEA (late embryogenesis abundant) proteins COR15A and COR15B from Arabidopsis thaliana are intrinsically disordered under fully hydrated conditions, but obtain α-helical structure during dehydration, which is reversible upon rehydration. To understand this unusual structural transition, both proteins were investigated by circular dichroism (CD) and molecular dynamics (MD) approaches. MD simulations showed unfolding of the proteins in water, in agreement with CD data obtained with both HIS-tagged and untagged recombinant proteins. Mainly intramolecular hydrogen bonds (H-bonds) formed by the protein backbone were replaced by H-bonds with water molecules. As COR15 proteins function in vivo as protectants in leaves partially dehydrated by freezing, unfolding was further assessed under crowded conditions. Glycerol reduced (40\%) or prevented (100\%) unfolding during MD simulations, in agreement with CD spectroscopy results. H-bonding analysis indicated that preferential exclusion of glycerol from the protein backbone increased stability of the folded state.}, language = {en} } @article{NavarroRetamalBremerAlzateMoralesetal.2016, author = {Navarro-Retamal, Carlos and Bremer, Anne and Alzate-Morales, Jans H. and Caballero, Julio and Hincha, Dirk K. and Gonzalez, Wendy and Thalhammer, Anja}, title = {Molecular dynamics simulations and CD spectroscopy reveal hydration-induced unfolding of the intrinsically disordered LEA proteins COR15A and COR15B from Arabidopsis thaliana}, series = {Physical chemistry, chemical physics : a journal of European Chemical Societies}, volume = {18}, journal = {Physical chemistry, chemical physics : a journal of European Chemical Societies}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1463-9076}, doi = {10.1039/c6cp02272c}, pages = {25806 -- 25816}, year = {2016}, abstract = {The LEA (late embryogenesis abundant) proteins COR15A and COR15B from Arabidopsis thaliana are intrinsically disordered under fully hydrated conditions, but obtain alpha-helical structure during dehydration, which is reversible upon rehydration. To understand this unusual structural transition, both proteins were investigated by circular dichroism (CD) and molecular dynamics (MD) approaches. MD simulations showed unfolding of the proteins in water, in agreement with CD data obtained with both HIS-tagged and untagged recombinant proteins. Mainly intramolecular hydrogen bonds (H-bonds) formed by the protein backbone were replaced by H-bonds with water molecules. As COR15 proteins function in vivo as protectants in leaves partially dehydrated by freezing, unfolding was further assessed under crowded conditions. Glycerol reduced (40\%) or prevented (100\%) unfolding during MD simulations, in agreement with CD spectroscopy results. H-bonding analysis indicated that preferential exclusion of glycerol from the protein backbone increased stability of the folded state.}, language = {en} } @article{NauschBachCzernyetal.2016, author = {Nausch, Monika and Bach, Lennart Thomas and Czerny, Jan and Goldstein, Josephine and Grossart, Hans-Peter and Hellemann, Dana and Hornick, Thomas and Achterberg, Eric Pieter and Schulz, Kai-Georg and Riebesell, Ulf}, title = {Effects of CO2 perturbation on phosphorus pool sizes and uptake in a mesocosm experiment during a low productive summer season in the northern Baltic Sea}, series = {Biogeosciences}, volume = {13}, journal = {Biogeosciences}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1726-4170}, doi = {10.5194/bg-13-3035-2016}, pages = {3035 -- 3050}, year = {2016}, abstract = {Studies investigating the effect of increasing CO2 levels on the phosphorus cycle in natural waters are lacking although phosphorus often controls phytoplankton development in many aquatic systems. The aim of our study was to analyse effects of elevated CO2 levels on phosphorus pool sizes and uptake. The phosphorus dynamic was followed in a CO2-manipulation mesocosm experiment in the Storfjarden (western Gulf of Finland, Baltic Sea) in summer 2012 and was also studied in the surrounding fjord water. In all mesocosms as well as in surface waters of Storfjarden, dissolved organic phosphorus (DOP) concentrations of 0.26aEuro-+/- aEuro-0.03 and 0.23aEuro-+/- aEuro-0.04aEuro-A mu molaEuro-L-1, respectively, formed the main fraction of the total P-pool (TP), whereas phosphate (PO4) constituted the lowest fraction with mean concentration of 0.15aEuro-A +/- aEuro-0.02 in the mesocosms and 0.17aEuro-A +/- aEuro-0.07aEuro-A mu molaEuro-L-1 in the fjord. Transformation of PO4 into DOP appeared to be the main pathway of PO4 turnover. About 82aEuro-\% of PO4 was converted into DOP whereby only 18aEuro-\% of PO4 was transformed into particulate phosphorus (PP). PO4 uptake rates measured in the mesocosms ranged between 0.6 and 3.9aEuro-nmolaEuro-L(-1)aEuro-h(-1). About 86aEuro-\% of them was realized by the size fraction < aEuro-3aEuro-A mu m. Adenosine triphosphate (ATP) uptake revealed that additional P was supplied from organic compounds accounting for 25-27aEuro-\% of P provided by PO4 only. CO2 additions did not cause significant changes in phosphorus (P) pool sizes, DOP composition, and uptake of PO4 and ATP when the whole study period was taken into account. However, significant short-term effects were observed for PO4 and PP pool sizes in CO2 treatments > aEuro-1000aEuro-A mu atm during periods when phytoplankton biomass increased. In addition, we found significant relationships (e.g., between PP and Chl a) in the untreated mesocosms which were not observed under high fCO(2) conditions. Consequently, it can be hypothesized that the relationship between PP formation and phytoplankton growth changed with CO2 elevation. It can be deduced from the results, that visible effects of CO2 on P pools are coupled to phytoplankton growth when the transformation of PO4 into POP was stimulated. The transformation of PO4 into DOP on the other hand does not seem to be affected. Additionally, there were some indications that cellular mechanisms of P regulation might be modified under CO2 elevation changing the relationship between cellular constituents.}, language = {en} } @misc{NauschBachCzernyetal.2016, author = {Nausch, Monika and Bach, Lennart Thomas and Czerny, Jan and Goldstein, Josephine and Grossart, Hans-Peter and Hellemann, Dana and Hornick, Thomas and Achterberg, Eric Pieter and Schulz, Kai Georg and Riebesell, Ulf}, title = {Effects of CO 2 perturbation on phosphorus pool sizes and uptake in a mesocosm experiment during a low productive summer season in the northern Baltic Sea}, series = {Biogeosciences}, journal = {Biogeosciences}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-410274}, pages = {16}, year = {2016}, abstract = {Studies investigating the effect of increasing CO2 levels on the phosphorus cycle in natural waters are lacking although phosphorus often controls phytoplankton development in many aquatic systems. The aim of our study was to analyse effects of elevated CO2 levels on phosphorus pool sizes and uptake. The phosphorus dynamic was followed in a CO2-manipulation mesocosm experiment in the Storfjarden (western Gulf of Finland, Baltic Sea) in summer 2012 and was also studied in the surrounding fjord water. In all mesocosms as well as in surface waters of Storfjarden, dissolved organic phosphorus (DOP) concentrations of 0.26aEuro-+/- aEuro-0.03 and 0.23aEuro-+/- aEuro-0.04aEuro-A mu molaEuro-L-1, respectively, formed the main fraction of the total P-pool (TP), whereas phosphate (PO4) constituted the lowest fraction with mean concentration of 0.15aEuro-A +/- aEuro-0.02 in the mesocosms and 0.17aEuro-A +/- aEuro-0.07aEuro-A mu molaEuro-L-1 in the fjord. Transformation of PO4 into DOP appeared to be the main pathway of PO4 turnover. About 82aEuro-\% of PO4 was converted into DOP whereby only 18aEuro-\% of PO4 was transformed into particulate phosphorus (PP). PO4 uptake rates measured in the mesocosms ranged between 0.6 and 3.9aEuro-nmolaEuro-L(-1)aEuro-h(-1). About 86aEuro-\% of them was realized by the size fraction < aEuro-3aEuro-A mu m. Adenosine triphosphate (ATP) uptake revealed that additional P was supplied from organic compounds accounting for 25-27aEuro-\% of P provided by PO4 only. CO2 additions did not cause significant changes in phosphorus (P) pool sizes, DOP composition, and uptake of PO4 and ATP when the whole study period was taken into account. However, significant short-term effects were observed for PO4 and PP pool sizes in CO2 treatments > aEuro-1000aEuro-A mu atm during periods when phytoplankton biomass increased. In addition, we found significant relationships (e.g., between PP and Chl a) in the untreated mesocosms which were not observed under high fCO(2) conditions. Consequently, it can be hypothesized that the relationship between PP formation and phytoplankton growth changed with CO2 elevation. It can be deduced from the results, that visible effects of CO2 on P pools are coupled to phytoplankton growth when the transformation of PO4 into POP was stimulated. The transformation of PO4 into DOP on the other hand does not seem to be affected. Additionally, there were some indications that cellular mechanisms of P regulation might be modified under CO2 elevation changing the relationship between cellular constituents.}, language = {en} } @article{NaolouLendleinNeffe2016, author = {Naolou, Toufik and Lendlein, Andreas and Neffe, Axel T.}, title = {Influence of metal softness on the metal-organic catalyzed polymerization of inorpholin-2,5-diones to oligodepsipeptides}, series = {European polymer journal}, volume = {85}, journal = {European polymer journal}, publisher = {Elsevier}, address = {Oxford}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2016.10.011}, pages = {139 -- 149}, year = {2016}, language = {en} } @article{NakanoIkemotoJacobetal.2016, author = {Nakano, Yoko and Ikemoto, Yu and Jacob, Gunnar and Clahsen, Harald}, title = {How Orthography Modulates Morphological Priming}, series = {Frontiers in psychology}, volume = {7}, journal = {Frontiers in psychology}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2016.00316}, pages = {10}, year = {2016}, abstract = {The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic) scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i) a past-tense form of the same verb, (ii) a stem-related form with the epenthetic vowel -i, (iii) a semantically-related form, and (iv) a phonologically-related form. Significant priming effects were obtained for prime types (i), (ii), and (iii), but not for (iv). This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i), but not for non-affixal and semantically-related primes of types (ii), and (iii). In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts—orthographically related, but which—in their commonly written form—share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system) affect the processing of (morphologically) complex words.}, language = {en} } @misc{NakanoIkemotoJacobetal.2016, author = {Nakano, Yoko and Ikemoto, Yu and Jacob, Gunnar and Clahsen, Harald}, title = {How Orthography Modulates Morphological Priming}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-91692}, pages = {10}, year = {2016}, abstract = {The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic) scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i) a past-tense form of the same verb, (ii) a stem-related form with the epenthetic vowel -i, (iii) a semantically-related form, and (iv) a phonologically-related form. Significant priming effects were obtained for prime types (i), (ii), and (iii), but not for (iv). This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i), but not for non-affixal and semantically-related primes of types (ii), and (iii). In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts—orthographically related, but which—in their commonly written form—share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system) affect the processing of (morphologically) complex words.}, language = {en} } @article{NakanoIkemotoJacobetal.2016, author = {Nakano, Yoko and Ikemoto, Yu and Jacob, Gunnar and Clahsen, Harald}, title = {How Orthography Modulates Morphological Priming: Subliminal Kanji Activation in Japanese}, series = {Frontiers in psychology}, volume = {7}, journal = {Frontiers in psychology}, publisher = {Frontiers Research Foundation}, address = {Lausanne}, issn = {1664-1078}, doi = {10.3389/fpsyg.2016.00316}, pages = {10}, year = {2016}, abstract = {The current study investigates to what extent masked morphological priming is modulated by language-particular properties, specifically by its writing system. We present results from two masked priming experiments investigating the processing of complex Japanese words written in less common (moraic) scripts. In Experiment 1, participants performed lexical decisions on target verbs; these were preceded by primes which were either (i) a past-tense form of the same verb, (ii) a stem-related form with the epenthetic vowel-i, (iii) a semantically-related form, and (iv) a phonologically-related form. Significant priming effects were obtained for prime types (i), (ii), and (iii), but not for (iv). This pattern of results differs from previous findings on languages with alphabetic scripts, which found reliable masked priming effects for morphologically related prime/target pairs of type (i), but not for non-affixal and semantically-related primes of types (ii), and (iii). In Experiment 2, we measured priming effects for prime/target pairs which are neither morphologically, semantically, phonologically nor - as presented in their moraic scripts orthographically related, but which in their commonly written form share the same kanji, which are logograms adopted from Chinese. The results showed a significant priming effect, with faster lexical-decision times for kanji-related prime/target pairs relative to unrelated ones. We conclude that affix-stripping is insufficient to account for masked morphological priming effects across languages, but that language-particular properties (in the case of Japanese, the writing system) affect the processing of (morphologically) complex words.}, language = {en} } @article{NagornovOsipoyKomarovetal.2016, author = {Nagornov, Roman and Osipoy, Grigory and Komarov, Maxim and Pikovskij, Arkadij and Shilnikov, Andrey}, title = {Mixed-mode synchronization between two inhibitory neurons with post-inhibitory rebound}, series = {Communications in nonlinear science \& numerical simulation}, volume = {36}, journal = {Communications in nonlinear science \& numerical simulation}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1007-5704}, doi = {10.1016/j.cnsns.2015.11.024}, pages = {175 -- 191}, year = {2016}, abstract = {We study an array of activity rhythms generated by a half-center oscillator (HCO), represented by a pair of reciprocally coupled neurons with post-inhibitory rebounds (PIR). Such coupling induced bursting possesses two time scales, one for fast spiking and another for slow quiescent periods, is shown to exhibit an array of synchronization properties. We discuss several HCO configurations constituted by two endogenous bursters, by tonic-spiking and quiescent neurons, as well as mixed-mode configurations composed of neurons of different type. We demonstrate that burst synchronization can be accompanied by complex, often chaotic, interactions of fast spikes within synchronized bursts. (C) 2015 Elsevier B.V. All rights reserved.}, language = {en} } @article{NabhanLuberScheffleretal.2016, author = {Nabhan, Sami and Luber, Tim and Scheffler, Franziska and Heubeck, Christoph}, title = {Climatic and geochemical implications of Archean pedogenic gypsum in the Moodies Group (similar to 3.2 Ga), Barberton Greenstone Belt, South Africa}, series = {Precambrian research}, volume = {275}, journal = {Precambrian research}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0301-9268}, doi = {10.1016/j.precamres.2016.01.011}, pages = {119 -- 134}, year = {2016}, abstract = {Lithic sandstones of braided-fluvial to supratidal facies in the Paleoarchean Moodies Group (similar to 3.22 Ga, Barberton Greenstone Belt, South Africa) include several regionally traceable units with common to abundant, in places rock-forming, nodular concretions of megaquartz pseudomorphs after gypsum, barite and calcite. Concretionary accumulations are stratiform and commonly associated with aqueously reworked, fine-grained, tuffaceous sediment of originally rhyodacitic composition and can grow to fist sized agglomerates in crusts tens of m in lateral extent. Weathering of tuffaceous material and feldspar delivered alkali cations such as Ca, Ba, and K, while carbonates were likely supplied by silicate weathering of mafic to ultramafic volcanic rocks during exposure to a CO2-rich atmosphere. Sulfate ions were partly delivered by oxidative pyrite dissolution which may have included microbial and abiotic disproportionation of volcanic S or SO2. Concretionary growth apparently took place under pedogenic to early diagenetic conditions within unconsolidated granular sediment in the vadose zone, dominated by seasonal fluctuations of the groundwater level under evaporitic conditions. The concretions likely represent the oldest terrestrial evaporites known to date and form part of the oldest known compound paleosols. Their formation and composition constrain the local occurrence of sulfate in the Archean atmo- and hydrosphere, their interaction with the emerging biosphere, Archean weathering regime, local climate, and vadose-zone hydrodynamics. (C) 2016 Elsevier B.V. All rights reserved.}, language = {en} } @misc{Muerbe2016, author = {M{\"u}rbe, Ulrike}, title = {Normativer Individualismus in Ethik, Politik und Recht [rezensiert von Ulrike M{\"u}rbe]}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {21}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {1}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95163}, pages = {88 -- 91}, year = {2016}, abstract = {Buchbesprechung: Dietmar von der Pfordten, Lorenz K{\"a}hler (Hrsg.), Normativer Individualismus in Ethik, Politik und Recht, T{\"u}bingen: Mohr Siebeck, 2014, 255 Seiten, ISBN 978-3-16-153629-8, 54,00 €.}, language = {de} } @misc{MuenzbergHassKhanhetal.2016, author = {M{\"u}nzberg, Marvin and Hass, Roland and Khanh, Ninh Dinh Duc and Reich, Oliver}, title = {Limitations of turbidity process probes and formazine as their calibration standard}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, number = {831}, issn = {1866-8372}, doi = {10.25932/publishup-42826}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-428263}, pages = {12}, year = {2016}, abstract = {Turbidity measurements are frequently implemented for the monitoring of heterogeneous chemical, physical, or biotechnological processes. However, for quantitative measurements, turbidity probes need calibration, as is requested and regulated by the ISO 7027:1999. Accordingly, a formazine suspension has to be produced. Despite this regulatory demand, no scientific publication on the stability and reproducibility of this polymerization process is available. In addition, no characterization of the optical properties of this calibration material with other optical methods had been achieved so far. Thus, in this contribution, process conditions such as temperature and concentration have been systematically investigated by turbidity probe measurements and Photon Density Wave (PDW) spectroscopy, revealing an influence on the temporal formazine formation onset. In contrast, different reaction temperatures do not lead to different scattering properties for the final formazine suspensions, but give an access to the activation energy for this condensation reaction. Based on PDW spectroscopy data, the synthesis of formazine is reproducible. However, very strong influences of the ambient conditions on the measurements of the turbidity probe have been observed, limiting its applicability. The restrictions of the turbidity probe with respect to scatterer concentration are examined on the basis of formazine and polystyrene suspensions. Compared to PDW spectroscopy data, signal saturation is observed at already low reduced scattering coefficients.}, language = {en} } @misc{MuenchKipfstuhlFreitagetal.2016, author = {M{\"u}nch, Thomas and Kipfstuhl, Sepp and Freitag, Johannes and Meyer, Hanno and Laepple, Thomas}, title = {Regional climate signal vs. local noise}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {500}, issn = {1866-8372}, doi = {10.25932/publishup-40838}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-408385}, pages = {17}, year = {2016}, abstract = {In low-accumulation regions, the reliability of delta O-18-derived temperature signals from ice cores within the Holocene is unclear, primarily due to the small climate changes relative to the intrinsic noise of the isotopic signal. In order to learn about the representativity of single ice cores and to optimise future ice-core-based climate reconstructions, we studied the stable-water isotope composition of firn at Kohnen Station, Dronning Maud Land, Antarctica. Analysing delta O-18 in two 50m long snow trenches allowed us to create an unprecedented, two-dimensional image characterising the isotopic variations from the centimetre to the 100-metre scale. Our results show seasonal layering of the isotopic composition but also high horizontal isotopic variability caused by local stratigraphic noise. Based on the horizontal and vertical structure of the isotopic variations, we derive a statistical noise model which successfully explains the trench data. The model further allows one to determine an upper bound for the reliability of climate reconstructions conducted in our study region at seasonal to annual resolution, depending on the number and the spacing of the cores taken.}, language = {en} } @article{MuenchKipfstuhlFreitagetal.2016, author = {M{\"u}nch, Thomas and Kipfstuhl, Sepp and Freitag, Johannes and Meyer, Hanno and Laepple, Thomas}, title = {Regional climate signal vs. local noise: a two-dimensional view of water isotopes in Antarctic firn at Kohnen Station, Dronning Maud Land}, series = {Climate of the past : an interactive open access journal of the European Geosciences Union}, volume = {12}, journal = {Climate of the past : an interactive open access journal of the European Geosciences Union}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1814-9324}, doi = {10.5194/cp-12-1565-2016}, pages = {1565 -- 1581}, year = {2016}, abstract = {In low-accumulation regions, the reliability of delta O-18-derived temperature signals from ice cores within the Holocene is unclear, primarily due to the small climate changes relative to the intrinsic noise of the isotopic signal. In order to learn about the representativity of single ice cores and to optimise future ice-core-based climate reconstructions, we studied the stable-water isotope composition of firn at Kohnen Station, Dronning Maud Land, Antarctica. Analysing delta O-18 in two 50m long snow trenches allowed us to create an unprecedented, two-dimensional image characterising the isotopic variations from the centimetre to the 100-metre scale. Our results show seasonal layering of the isotopic composition but also high horizontal isotopic variability caused by local stratigraphic noise. Based on the horizontal and vertical structure of the isotopic variations, we derive a statistical noise model which successfully explains the trench data. The model further allows one to determine an upper bound for the reliability of climate reconstructions conducted in our study region at seasonal to annual resolution, depending on the number and the spacing of the cores taken.}, language = {en} } @phdthesis{Mueller2016, author = {M{\"u}ller, Stephan Heinz}, title = {Aggregates Caching for Enterprise Applications}, school = {Universit{\"a}t Potsdam}, pages = {167}, year = {2016}, abstract = {The introduction of columnar in-memory databases, along with hardware evolution, has made the execution of transactional and analytical enterprise application workloads on a single system both feasible and viable. Yet, we argue that executing analytical aggregate queries directly on the transactional data can decrease the overall system performance. Despite the aggregation capabilities of columnar in-memory databases, the direct access to records of a materialized aggregate is always more efficient than aggregating on the fly. The traditional approach to materialized aggregates, however, introduces significant overhead in terms of materialized view selection, maintenance, and exploitation. When this overhead is handled by the application, it increases the application complexity, and can slow down the transactional throughput of inserts, updates, and deletes. In this thesis, we motivate, propose, and evaluate the aggregate cache, a materialized aggregate engine in the main-delta architecture of a columnar in-memory database that provides efficient means to handle costly aggregate queries of enterprise applications. For our design, we leverage the specifics of the main-delta architecture that separates a table into a main and delta partition. The central concept is to only cache the partial aggregate query result as defined on the main partition of a table, because the main partition is relatively stable as records are only inserted into the delta partition. We contribute by proposing incremental aggregate maintenance and query compensation techniques for mixed workloads of enterprise applications. In addition, we introduce aggregate profit metrics that increase the likelihood of persisting the most profitable aggregates in the aggregate cache. Query compensation and maintenance of materialized aggregates based on joins of multiple tables is expensive due to the partitioned tables in the main-delta architecture. Our analysis of enterprise applications has revealed several data schema and workload patterns. This includes the observation that transactional data is persisted in header and item tables, whereas in many cases, the insertion of related header and item records is executed in a single database transaction. We contribute by proposing an approach to transport these application object semantics to the database system and optimize the query processing using the aggregate cache by applying partition pruning and predicate pushdown techniques. For the experimental evaluation, we propose the FICO benchmark that is based on data from a productive ERP system with extracted mixed workloads. Our evaluation reveals that the aggregate cache can accelerate the execution of aggregate queries up to a factor of 60 whereas the speedup highly depends on the number of aggregated records in the main and delta partitions. In mixed workloads, the proposed aggregate maintenance and query compensation techniques perform up to an order of magnitude better than traditional materialized aggregate maintenance approaches. The introduced aggregate profit metrics outperform existing costbased metrics by up to 20\%. Lastly, the join pruning and predicate pushdown techniques can accelerate query execution in the aggregate cache in the presence of multiple partitioned tables by up to an order of magnitude.}, language = {en} } @article{MuellerMuellerStolletal.2016, author = {M{\"u}ller, Steffen and M{\"u}ller, Juliane and Stoll, Josefine and Prieske, Olaf and Cassel, Michael and Mayer, Frank}, title = {Incidence of back pain in adolescent athletes}, series = {BMC sports science, medicine \& rehabilitation}, volume = {8}, journal = {BMC sports science, medicine \& rehabilitation}, publisher = {BioMed Central}, address = {London}, issn = {2052-1847}, doi = {10.1186/s13102-016-0064-7}, pages = {5}, year = {2016}, abstract = {Background Recently, the incidence rate of back pain (BP) in adolescents has been reported at 21\%. However, the development of BP in adolescent athletes is unclear. Hence, the purpose of this study was to examine the incidence of BP in young elite athletes in relation to gender and type of sport practiced. Methods Subjective BP was assessed in 321 elite adolescent athletes (m/f 57\%/43\%; 13.2 ± 1.4 years; 163.4 ± 11.4 cm; 52.6 ± 12.6 kg; 5.0 ± 2.6 training yrs; 7.6 ± 5.3 training h/week). Initially, all athletes were free of pain. The main outcome criterion was the incidence of back pain [\%] analyzed in terms of pain development from the first measurement day (M1) to the second measurement day (M2) after 2.0 ± 1.0 year. Participants were classified into athletes who developed back pain (BPD) and athletes who did not develop back pain (nBPD). BP (acute or within the last 7 days) was assessed with a 5-step face scale (face 1-2 = no pain; face 3-5 = pain). BPD included all athletes who reported faces 1 and 2 at M1 and faces 3 to 5 at M2. nBPD were all athletes who reported face 1 or 2 at both M1 and M2. Data was analyzed descriptively. Additionally, a Chi2 test was used to analyze gender- and sport-specific differences (p = 0.05). Results Thirty-two athletes were categorized as BPD (10\%). The gender difference was 5\% (m/f: 12\%/7\%) but did not show statistical significance (p = 0.15). The incidence of BP ranged between 6 and 15\% for the different sport categories. Game sports (15\%) showed the highest, and explosive strength sports (6\%) the lowest incidence. Anthropometrics or training characteristics did not significantly influence BPD (p = 0.14 gender to p = 0.90 sports; r2 = 0.0825). Conclusions BP incidence was lower in adolescent athletes compared to young non-athletes and even to the general adult population. Consequently, it can be concluded that high-performance sports do not lead to an additional increase in back pain incidence during early adolescence. Nevertheless, back pain prevention programs should be implemented into daily training routines for sport categories identified as showing high incidence rates.}, language = {en} } @article{MuellerCarlsohnMuelleretal.2016, author = {M{\"u}ller, Steffen and Carlsohn, Anja and M{\"u}ller, Juliane and Baur, Heiner and Mayer, Frank}, title = {Influence of Obesity on Foot Loading Characteristics in Gait for Children Aged 1 to 12 Years}, series = {PLoS one}, volume = {11}, journal = {PLoS one}, number = {2}, publisher = {Public Library of Science}, address = {Lawrence, Kan.}, issn = {1932-6203}, doi = {10.1371/journal.pone.0149924}, year = {2016}, abstract = {Background Overweight and obesity are increasing health problems that are not restricted to adults only. Childhood obesity is associated with metabolic, psychological and musculoskeletal comorbidities. However, knowledge about the effect of obesity on the foot function across maturation is lacking. Decreased foot function with disproportional loading characteristics is expected for obese children. The aim of this study was to examine foot loading characteristics during gait of normal-weight, overweight and obese children aged 1-12 years. Methods A total of 10382 children aged one to twelve years were enrolled in the study. Finally, 7575 children (m/f: n = 3630/3945; 7.0 +/- 2.9yr; 1.23 +/- 0.19m; 26.6 +/- 10.6kg; BMI: 17.1 +/- 2.4kg/m(2)) were included for (complete case) data analysis. Children were categorized to normalweight (>= 3rd and <90th percentile; n = 6458), overweight (>= 90rd and <97th percentile; n = 746) or obese (>97th percentile; n = 371) according to the German reference system that is based on age and gender-specific body mass indices (BMI). Plantar pressure measurements were assessed during gait on an instrumented walkway. Contact area, arch index (AI), peak pressure (PP) and force time integral (FTI) were calculated for the total, fore-, mid-and hindfoot. Data was analyzed descriptively (mean +/- SD) followed by ANOVA/Welch-test (according to homogeneity of variances: yes/no) for group differences according to BMI categorization (normal-weight, overweight, obesity) and for each age group 1 to 12yrs (post-hoc Tukey Kramer/Dunnett's C; alpha = 0.05). Results Mean walking velocity was 0.95 +/- 0.25 m/s with no differences between normal-weight, overweight or obese children (p = 0.0841). Results show higher foot contact area, arch index, peak pressure and force time integral in overweight and obese children (p< 0.001). Obese children showed the 1.48-fold (1 year-old) to 3.49-fold (10 year-old) midfoot loading (FTI) compared to normal-weight. Conclusion Additional body mass leads to higher overall load, with disproportional impact on the midfoot area and longitudinal foot arch showing characteristic foot loading patterns. Already the feet of one and two year old children are significantly affected. Childhood overweight and obesity is not compensated by the musculoskeletal system. To avoid excessive foot loading with potential risk of discomfort or pain in childhood, prevention strategies should be developed and validated for children with a high body mass index and functional changes in the midfoot area. The presented plantar pressure values could additionally serve as reference data to identify suspicious foot loading patterns in children.}, language = {en} } @misc{MuellerCarlsohnMuelleretal.2016, author = {M{\"u}ller, Steffen and Carlsohn, Anja and M{\"u}ller, Juliane and Baur, Heiner and Mayer, Frank}, title = {Influence of Obesity on Foot Loading Characteristics in Gait for Children Aged 1 to 12 Years}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-90108}, year = {2016}, abstract = {Background Overweight and obesity are increasing health problems that are not restricted to adults only. Childhood obesity is associated with metabolic, psychological and musculoskeletal comorbidities. However, knowledge about the effect of obesity on the foot function across maturation is lacking. Decreased foot function with disproportional loading characteristics is expected for obese children. The aim of this study was to examine foot loading characteristics during gait of normal-weight, overweight and obese children aged 1-12 years. Methods A total of 10382 children aged one to twelve years were enrolled in the study. Finally, 7575 children (m/f: n = 3630/3945; 7.0 +/- 2.9yr; 1.23 +/- 0.19m; 26.6 +/- 10.6kg; BMI: 17.1 +/- 2.4kg/m(2)) were included for (complete case) data analysis. Children were categorized to normalweight (>= 3rd and <90th percentile; n = 6458), overweight (>= 90rd and <97th percentile; n = 746) or obese (>97th percentile; n = 371) according to the German reference system that is based on age and gender-specific body mass indices (BMI). Plantar pressure measurements were assessed during gait on an instrumented walkway. Contact area, arch index (AI), peak pressure (PP) and force time integral (FTI) were calculated for the total, fore-, mid-and hindfoot. Data was analyzed descriptively (mean +/- SD) followed by ANOVA/Welch-test (according to homogeneity of variances: yes/no) for group differences according to BMI categorization (normal-weight, overweight, obesity) and for each age group 1 to 12yrs (post-hoc Tukey Kramer/Dunnett's C; alpha = 0.05). Results Mean walking velocity was 0.95 +/- 0.25 m/s with no differences between normal-weight, overweight or obese children (p = 0.0841). Results show higher foot contact area, arch index, peak pressure and force time integral in overweight and obese children (p< 0.001). Obese children showed the 1.48-fold (1 year-old) to 3.49-fold (10 year-old) midfoot loading (FTI) compared to normal-weight. Conclusion Additional body mass leads to higher overall load, with disproportional impact on the midfoot area and longitudinal foot arch showing characteristic foot loading patterns. Already the feet of one and two year old children are significantly affected. Childhood overweight and obesity is not compensated by the musculoskeletal system. To avoid excessive foot loading with potential risk of discomfort or pain in childhood, prevention strategies should be developed and validated for children with a high body mass index and functional changes in the midfoot area. The presented plantar pressure values could additionally serve as reference data to identify suspicious foot loading patterns in children.}, language = {en} } @phdthesis{Mueller2016, author = {M{\"u}ller, Maximilian}, title = {Organisationsmodelle f{\"u}r Beschaffung, Betrieb und Finanzierung von Lufttransportkapazit{\"a}ten in der internationalen Katastrophenhilfe}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-101021}, school = {Universit{\"a}t Potsdam}, pages = {ix, 229}, year = {2016}, abstract = {Die Dissertation befasst sich mit der Organisation von humanit{\"a}ren Lufttransporten bei internationalen Katastrophen. Diese Fl{\"u}ge finden immer dann statt, wenn die eigene Hilfeleistungsf{\"a}higkeit der von Katastrophen betroffenen Regionen {\"u}berfordert ist und Hilfe aus dem Ausland angefordert wird. Bei jedem der darauffolgenden Hilfseins{\"a}tze stehen Hilfsorganisationen und weitere mit der Katastrophenhilfe beteiligte Akteure erneut vor der Herausforderung, in k{\"u}rzester Zeit eine logistische Kette aufzubauen, damit die G{\"u}ter zum richtigen Zeitpunkt in der richtigen Menge am richtigen Ort eintreffen. Humanit{\"a}re Lufttransporte werden in der Regel als Charterfl{\"u}ge organisiert und finden auf langen Strecken zu Zielen statt, die nicht selten abseits der hochfrequentierten Warenstr{\"o}me liegen. Am Markt ist das Angebot f{\"u}r derartige Transportdienstleistungen nicht gesichert verf{\"u}gbar und unter Umst{\"a}nden m{\"u}ssen Hilfsorganisationen warten bis Kapazit{\"a}ten mit geeigneten Flugzeugen zur Verf{\"u}gung stehen. Auch qualitativ sind die Anforderungen von Hilfsorganisationen an die Hilfsg{\"u}tertransporte h{\"o}her als im regul{\"a}ren Linientransport. Im Rahmen der Dissertation wird ein alternatives Organisationsmodell f{\"u}r die Beschaffung und den Betrieb sowie die Finanzierung von humanit{\"a}ren Lufttransporten aufgebaut. Dabei wird die gesicherte Verf{\"u}gbarkeit von besonders flexibel einsetzbaren Flugzeugen in Betracht gezogen, mit deren Hilfe die Qualit{\"a}t und insbesondere die Planbarkeit der Hilfeleistung verbessert werden k{\"o}nnte. Ein idealtypisches Modell wird hier durch die Kopplung der Kollektivg{\"u}tertheorie, die der Finanzwissenschaft zuzuordnen ist, mit der Vertragstheorie als Bestandteil der Neuen Institutionen{\"o}konomik erarbeitet. Empirische Beitr{\"a}ge zur Vertragstheorie bem{\"a}ngeln, dass es bei der Beschaffung von transaktionsspezifischen Investitionsg{\"u}tern, wie etwa Flugzeugen mit besonderen Eigenschaften, aufgrund von Risiken und Umweltunsicherheiten zu ineffizienten L{\"o}sungen zwischen Vertragspartnern kommt. Die vorliegende Dissertation zeigt eine M{\"o}glichkeit auf, wie durch Aufbau einer gemeinsamen Informationsbasis ex-ante, also vor Vertragsschluss, Risiken und Umweltunsicherheiten reduziert werden k{\"o}nnen. Dies geschieht durch eine temporale Erweiterung eines empirischen Modells zur Bestimmung der Organisationsform bei transaktionsspezifischen Investitionsg{\"u}tern aus der Regulierungs{\"o}konomik. Die Arbeitet leistet dar{\"u}ber hinaus einen Beitrag zur Steigerung der Effizienz in der humanit{\"a}ren Logistik durch die fallspezifische Betrachtung von horizontalen Kooperationen und Professionalisierung der Hilfeleistung im Bereich der humanit{\"a}ren Luftfahrt.}, language = {de} } @article{MuellerMuellerStolletal.2016, author = {M{\"u}ller, Juliane and M{\"u}ller, Steffen and Stoll, Josefine and Rector, Michael V. and Baur, Heiner and Mayer, Frank}, title = {Influence of Load on Three-Dimensional Segmental Trunk Kinematics in One-Handed Lifting: A Pilot Study}, series = {Journal of applied biomechanics}, volume = {32}, journal = {Journal of applied biomechanics}, publisher = {Human Kinetics Publ.}, address = {Champaign}, issn = {1065-8483}, doi = {10.1123/jab.2015-0227}, pages = {520 -- 525}, year = {2016}, abstract = {Stability of the trunk is relevant in determining trunk response to different loading in everyday tasks initiated by the limbs. Descriptions of the trunk's mechanical movement patterns in response to different loads while lifting objects are still under debate. Hence, the aim of this study was to analyze the influence of weight on 3-dimensional segmental motion of the trunk during 1-handed lifting. Ten asymptomatic subjects were included (29 ± 3 y; 1.79 ± 0.09 m; 75 ± 14 kg). Subjects lifted 3× a light and heavy load from the ground up onto a table. Three-dimensional segmental trunk motion was measured (12 markers; 3 segments: upper thoracic area [UTA], lower thoracic area [LTA], lumbar area [LA]). Outcomes were total motion amplitudes (ROM;[°]) for anterior flexion, lateral flexion, and rotation of each segment. The highest ROM was observed in the LTA segment (anterior flexion), and the smallest ROM in the UTA segment (lateral flexion). ROM differed for all planes between the 3 segments for both tasks (P < .001). There were no differences in ROM between light and heavy loads (P > .05). No interaction effects (load × segment) were observed, as ROM did not reveal differences between loading tasks. Regardless of weight, the 3 segments did reflect differences, supporting the relevance of multisegmental analysis.}, language = {en} } @article{MuellerMuellerEngeletal.2016, author = {M{\"u}ller, Juliane and M{\"u}ller, Steffen and Engel, Tilman and Reschke, Antje and Baur, Heiner and Mayer, Frank}, title = {Stumbling reactions during perturbed walking: Neuromuscular reflex activity and 3-D kinematics of the trunk - A pilot study}, series = {Journal of biomechanics}, volume = {49}, journal = {Journal of biomechanics}, publisher = {Elsevier}, address = {Oxford}, issn = {0021-9290}, doi = {10.1016/j.jbiomech.2015.09.041}, pages = {933 -- 938}, year = {2016}, abstract = {Stumbling led to an increase in ROM, compared to unperturbed gait, in all segments and planes. These increases ranged between 107 +/- 26\% (UTA/rotation) and 262 +/- 132\% (UTS/lateral flexion), significant only in lateral flexion. EMG activity of the trunk was increased during stumbling (abdominal: 665 +/- 283\%; back: 501 +/- 215\%), without significant differences between muscles. Provoked stumbling leads to a measurable effect on the trunk, quantifiable by an increase in ROM and EMG activity, compared to normal walking. Greater abdominal muscle activity and ROM of lateral flexion may indicate a specific compensation pattern occurring during stumbling. (C) 2015 Elsevier Ltd. All rights reserved.}, language = {en} } @phdthesis{Mueller2016, author = {M{\"u}ller, Hans-Georg}, title = {Der Majuskelgebrauch im Deutschen}, series = {Germanistische Linguistik ; 305}, volume = {2016}, journal = {Germanistische Linguistik ; 305}, publisher = {de Gruyter}, address = {Berlin}, isbn = {978-3-11-046096-4}, doi = {doi.org/10.1515/9783110460964}, school = {Universit{\"a}t Potsdam}, pages = {418}, year = {2016}, abstract = {Die Arbeit stellt die Funktionsweise und den Erwerb der deutschen Groß- und Kleinschreibung auf theoretischer und empirischer Grundlage dar. Den Ausgangspunkt bildet eine textpragmatische Verallgemeinerung bisheriger graphematischer Ans{\"a}tze, die zu einem {\"u}bergreifenden Modell des Majuskelgebrauchs im Deutschen erweitert werden und dabei auch nicht-orthografische Teilbereiche einschließen (Versalsatz, Kapit{\"a}lchen, Binnenmajuskel etc.). Im empirischen Teil der Arbeit werden die orthografischen Leistungsdaten von ca. 5.700 Probanden verschiedener Altersklassen (4. Klasse bis Erwachsenenbildung) untersucht und zu einem allgemeinen Erwerbsmodell der Groß- und Kleinschreibung ausgebaut. Mit Hilfe neuronaler Netzwerksimulationen werden unterschiedliche Lernertypen unterschieden und Diskontinuit{\"a}ten im Kompetenzerwerb nachgewiesen, die auf qualitative Strategiewechsel in der Ontogenese hindeuten. Den Abschluss bilden orthografiedidaktische und rechtschreibdiagnostische Reflexionen der Daten.}, language = {de} } @misc{MuellerBoeckmannKolgotinetal.2016, author = {M{\"u}ller, Detlef and B{\"o}ckmann, Christine and Kolgotin, Alexei and Schneidenbach, Lars and Chemyakin, Eduard and Rosemann, Julia and Znak, Pavel and Romanov, Anton}, title = {Microphysical particle properties derived from inversion algorithms developed in the framework of EARLINET}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {565}, issn = {1866-8372}, doi = {10.25932/publishup-41193}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-411934}, pages = {29}, year = {2016}, abstract = {We present a summary on the current status of two inversion algorithms that are used in EARLINET (European Aerosol Research Lidar Network) for the inversion of data collected with EARLINET multiwavelength Raman lidars. These instruments measure backscatter coefficients at 355, 532, and 1064 nm, and extinction coefficients at 355 and 532 nm. Development of these two algorithms started in 2000 when EARLINET was founded. The algorithms are based on a manually controlled inversion of optical data which allows for detailed sensitivity studies. The algorithms allow us to derive particle effective radius as well as volume and surface area concentration with comparably high confidence. The retrieval of the real and imaginary parts of the complex refractive index still is a challenge in view of the accuracy required for these parameters in climate change studies in which light absorption needs to be known with high accuracy. It is an extreme challenge to retrieve the real part with an accuracy better than 0.05 and the imaginary part with accuracy better than 0.005-0.1 or +/- 50 \%. Single-scattering albedo can be computed from the retrieved microphysical parameters and allows us to categorize aerosols into high-and low-absorbing aerosols. On the basis of a few exemplary simulations with synthetic optical data we discuss the current status of these manually operated algorithms, the potentially achievable accuracy of data products, and the goals for future work. One algorithm was used with the purpose of testing how well microphysical parameters can be derived if the real part of the complex refractive index is known to at least 0.05 or 0.1. The other algorithm was used to find out how well microphysical parameters can be derived if this constraint for the real part is not applied. The optical data used in our study cover a range of Angstrom exponents and extinction-to-backscatter (lidar) ratios that are found from lidar measurements of various aerosol types. We also tested aerosol scenarios that are considered highly unlikely, e.g. the lidar ratios fall outside the commonly accepted range of values measured with Raman lidar, even though the underlying microphysical particle properties are not uncommon. The goal of this part of the study is to test the robustness of the algorithms towards their ability to identify aerosol types that have not been measured so far, but cannot be ruled out based on our current knowledge of aerosol physics. We computed the optical data from monomodal logarithmic particle size distributions, i.e. we explicitly excluded the more complicated case of bimodal particle size distributions which is a topic of ongoing research work. Another constraint is that we only considered particles of spherical shape in our simulations. We considered particle radii as large as 7-10 mu m in our simulations where the Potsdam algorithm is limited to the lower value. We considered optical-data errors of 15\% in the simulation studies. We target 50\% uncertainty as a reasonable threshold for our data products, though we attempt to obtain data products with less uncertainty in future work.}, language = {en} } @article{MuellerBoeckmannKolgotinetal.2016, author = {M{\"u}ller, Detlef and B{\"o}ckmann, Christine and Kolgotin, Alexei and Schneidenbach, Lars and Chemyakin, Eduard and Rosemann, Julia and Znak, Pavel and Romanov, Anton}, title = {Microphysical particle properties derived from inversion algorithms developed in the framework of EARLINET}, series = {Atmospheric measurement techniques : an interactive open access journal of the European Geosciences Union}, volume = {9}, journal = {Atmospheric measurement techniques : an interactive open access journal of the European Geosciences Union}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1867-1381}, doi = {10.5194/amt-9-5007-2016}, pages = {5007 -- 5035}, year = {2016}, abstract = {We present a summary on the current status of two inversion algorithms that are used in EARLINET (European Aerosol Research Lidar Network) for the inversion of data collected with EARLINET multiwavelength Raman lidars. These instruments measure backscatter coefficients at 355, 532, and 1064 nm, and extinction coefficients at 355 and 532 nm. Development of these two algorithms started in 2000 when EARLINET was founded. The algorithms are based on a manually controlled inversion of optical data which allows for detailed sensitivity studies. The algorithms allow us to derive particle effective radius as well as volume and surface area concentration with comparably high confidence. The retrieval of the real and imaginary parts of the complex refractive index still is a challenge in view of the accuracy required for these parameters in climate change studies in which light absorption needs to be known with high accuracy. It is an extreme challenge to retrieve the real part with an accuracy better than 0.05 and the imaginary part with accuracy better than 0.005-0.1 or +/- 50 \%. Single-scattering albedo can be computed from the retrieved microphysical parameters and allows us to categorize aerosols into high-and low-absorbing aerosols. On the basis of a few exemplary simulations with synthetic optical data we discuss the current status of these manually operated algorithms, the potentially achievable accuracy of data products, and the goals for future work. One algorithm was used with the purpose of testing how well microphysical parameters can be derived if the real part of the complex refractive index is known to at least 0.05 or 0.1. The other algorithm was used to find out how well microphysical parameters can be derived if this constraint for the real part is not applied. The optical data used in our study cover a range of Angstrom exponents and extinction-to-backscatter (lidar) ratios that are found from lidar measurements of various aerosol types. We also tested aerosol scenarios that are considered highly unlikely, e.g. the lidar ratios fall outside the commonly accepted range of values measured with Raman lidar, even though the underlying microphysical particle properties are not uncommon. The goal of this part of the study is to test the robustness of the algorithms towards their ability to identify aerosol types that have not been measured so far, but cannot be ruled out based on our current knowledge of aerosol physics. We computed the optical data from monomodal logarithmic particle size distributions, i.e. we explicitly excluded the more complicated case of bimodal particle size distributions which is a topic of ongoing research work. Another constraint is that we only considered particles of spherical shape in our simulations. We considered particle radii as large as 7-10 mu m in our simulations where the Potsdam algorithm is limited to the lower value. We considered optical-data errors of 15\% in the simulation studies. We target 50\% uncertainty as a reasonable threshold for our data products, though we attempt to obtain data products with less uncertainty in future work.}, language = {en} } @misc{MuellerSchulzLauterbachetal.2016, author = {M{\"u}ller, Christina M. and Schulz, Benjamin and Lauterbach, Daniel and Ristow, Michael and Wissemann, Volker and Gemeinholzer, Birgit}, title = {Geropogon hybridus (L.) Sch.Bip. (Asteraceae) exhibits micro-geographic genetic divergence at ecological range limits along a steep precipitation gradient}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, number = {832}, issn = {1866-8372}, doi = {10.25932/publishup-42706}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-427061}, pages = {16}, year = {2016}, abstract = {We analyzed the population genetic pattern of 12 fragmented Geropogon hybridus ecological range edge populations in Israel along a steep precipitation gradient. In the investigation area (45 x 20 km(2)), the annual mean precipitation changes rapidly from 450 mm in the north (Mediterranean-influenced climate zone) to 300 mm in the south (semiarid climate zone) without significant temperature changes. Our analysis (91 individuals, 12 populations, 123 polymorphic loci) revealed strongly structured populations (AMOVA I broken vertical bar(ST) = 0.35; P < 0.001); however, differentiation did not change gradually toward range edge. IBD was significant (Mantel test r = 0.81; P = 0.001) and derived from sharply divided groups between the northernmost populations and the others further south, due to dispersal or environmental limitations. This was corroborated by the PCA and STRUCTURE analyses. IBD and IBE were significant despite the micro-geographic scale of the study area, which indicates that reduced precipitation toward range edge leads to population genetic divergence. However, this pattern diminished when the hypothesized gene flow barrier was taken into account. Applying the spatial analysis method revealed 11 outlier loci that were correlated to annual precipitation and, moreover, were indicative for putative precipitation-related adaptation (BAYESCAN, MCHEZA). The results suggest that even on micro-geographic scales, environmental factors play prominent roles in population divergence, genetic drift, and directional selection. The pattern is typical for strong environmental gradients, e.g., at species range edges and ecological limits, and if gene flow barriers and mosaic-like structures of fragmented habitats hamper dispersal.}, language = {en} } @article{Muehlbauer2016, author = {M{\"u}hlbauer, Evelyn}, title = {Mit Korbmachern zum Sieg}, series = {Sport als Thema im Deutschunterricht : Fachliche Grundlagen - Unterrichtsanregungen - Unterrichtsmaterialien}, journal = {Sport als Thema im Deutschunterricht : Fachliche Grundlagen - Unterrichtsanregungen - Unterrichtsmaterialien}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-381-7}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-99998}, pages = {129 -- 155}, year = {2016}, abstract = {1 Hinf{\"u}hrung, 2 Zum Buch, 3 Arbeit am Wortschatz: integrativ im wortschatzdidaktischen Dreischritt, 4 Wortschatz lehren und lernen mit dem Buch „Spielmacher", 5 Literatur}, language = {de} } @article{MoeringLeino2016, author = {M{\"o}ring, Sebastian and Leino, Olli Tapio}, title = {Beyond games as political education}, series = {Journal of Gaming \& Virtual Worlds}, volume = {8}, journal = {Journal of Gaming \& Virtual Worlds}, number = {2}, publisher = {Intellect}, address = {Bristol}, issn = {1757-191X}, doi = {10.1386/jgvw.8.2.145_1}, pages = {145 -- 161}, year = {2016}, abstract = {This article introduces the juxtaposed notions of liberal and neo-liberal gameplay in order to show that, while forms of contemporary game culture are heavily influenced by neo-liberalism, they often appear under a liberal disguise. The argument is grounded in Claus Pias' idea of games as always a product of their time in terms of economic, political and cultural history. The article shows that romantic play theories (e.g. Schiller, Huizinga and Caillois) are circling around the notion of play as 'free', which emerged in parallel with the philosophy of liberalism and respective socio-economic developments such as the industrialization and the rise of the nation state. It shows further that contemporary discourse in computer game studies addresses computer game/play as if it still was the romantic form of play rooted in the paradigm of liberalism. The article holds that an account that acknowledges the neo-liberalist underpinnings of computer games is more suited to addressing contemporary computer games, among which are phenomena such as free to play games, which repeat the structures of a neo-liberal society. In those games the players invest time and effort in developing their skills, although their future value is mainly speculative - just like this is the case for citizens of neo-liberal societies.}, language = {en} } @article{MoeringLeino2016, author = {M{\"o}ring, Sebastian and Leino, Olli}, title = {Beyond games as political education - neo-liberalism in the contemporary computer game form}, series = {Journal of gaming \& virtual worlds}, volume = {8}, journal = {Journal of gaming \& virtual worlds}, publisher = {Intellect Ltd.}, address = {Bristol}, issn = {1757-191X}, doi = {10.1386/jgvw.8.2.145_1}, pages = {145 -- 161}, year = {2016}, abstract = {This article introduces the juxtaposed notions of liberal and neo-liberal gameplay in order to show that, while forms of contemporary game culture are heavily influenced by neo-liberalism, they often appear under a liberal disguise. The argument is grounded in Claus Pias' idea of games as always a product of their time in terms of economic, political and cultural history. The article shows that romantic play theories (e.g. Schiller, Huizinga and Caillois) are circling around the notion of play as 'free', which emerged in parallel with the philosophy of liberalism and respective socio-economic developments such as the industrialization and the rise of the nation state. It shows further that contemporary discourse in computer game studies addresses computer game/play as if it still was the romantic form of play rooted in the paradigm of liberalism. The article holds that an account that acknowledges the neo-liberalist underpinnings of computer games is more suited to addressing contemporary computer games, among which are phenomena such as free to play games, which repeat the structures of a neo-liberal society. In those games the players invest time and effort in developing their skills, although their future value is mainly speculative - just like this is the case for citizens of neo-liberal societies.}, language = {en} } @misc{MysiakSurminskiThiekenetal.2016, author = {Mysiak, Jaroslav and Surminski, Swenja and Thieken, Annegret and Mechler, Reinhard and Aerts, Jeroen C. J. H.}, title = {Brief communication}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {524}, issn = {1866-8372}, doi = {10.25932/publishup-41014}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-410149}, pages = {5}, year = {2016}, abstract = {In March 2015, a new international blueprint for disaster risk reduction (DRR) was adopted in Sendai, Japan, at the end of the Third UN World Conference on Disaster Risk Reduction (WCDRR, 14-18 March 2015). We review and discuss the agreed commitments and targets, as well as the negotiation leading the Sendai Framework for DRR (SF-DRR) and discuss briefly its implication for the later UN-led negotiations on sustainable development goals and climate change.}, language = {en} } @article{MysiakSurminskiThiekenetal.2016, author = {Mysiak, Jaroslav and Surminski, Swenja and Thieken, Annegret and Mechler, Reinhard and Aerts, Jeroen C. J. H.}, title = {Brief communication: Sendai framework for disaster risk reduction - success or warning sign for Paris?}, series = {Natural hazards and earth system sciences}, volume = {16}, journal = {Natural hazards and earth system sciences}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1561-8633}, doi = {10.5194/nhess-16-2189-2016}, pages = {2189 -- 2193}, year = {2016}, abstract = {In March 2015, a new international blueprint for disaster risk reduction (DRR) was adopted in Sendai, Japan, at the end of the Third UN World Conference on Disaster Risk Reduction (WCDRR, 14-18 March 2015). We review and discuss the agreed commitments and targets, as well as the negotiation leading the Sendai Framework for DRR (SF-DRR) and discuss briefly its implication for the later UN-led negotiations on sustainable development goals and climate change.}, language = {en} } @article{MyachykovEllisCangelosietal.2016, author = {Myachykov, Andriy and Ellis, Rob and Cangelosi, Angelo and Fischer, Martin H.}, title = {Ocular drift along the mental number line}, series = {Psychological research : an international journal of perception, attention, memory, and action}, volume = {80}, journal = {Psychological research : an international journal of perception, attention, memory, and action}, publisher = {Springer}, address = {Heidelberg}, issn = {0340-0727}, doi = {10.1007/s00426-015-0731-4}, pages = {379 -- 388}, year = {2016}, abstract = {We examined the spontaneous association between numbers and space by documenting attention deployment and the time course of associated spatial-numerical mapping with and without overt oculomotor responses. In Experiment 1, participants maintained central fixation while listening to number names. In Experiment 2, they made horizontal target-direct saccades following auditory number presentation. In both experiments, we continuously measured spontaneous ocular drift in horizontal space during and after number presentation. Experiment 2 also measured visual-probe-directed saccades following number presentation. Reliable ocular drift congruent with a horizontal mental number line emerged during and after number presentation in both experiments. Our results provide new evidence for the implicit and automatic nature of the oculomotor resonance effect associated with the horizontal spatial-numerical mapping mechanism.}, language = {en} } @misc{MyachykovEllisCangelosietal.2016, author = {Myachykov, Andriy and Ellis, Rob and Cangelosi, Angelo and Fischer, Martin H.}, title = {Ocular drift along the mental number line}, series = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe}, number = {553}, issn = {1866-8364}, doi = {10.25932/publishup-43048}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-430483}, pages = {379 -- 388}, year = {2016}, abstract = {We examined the spontaneous association between numbers and space by documenting attention deployment and the time course of associated spatial-numerical mapping with and without overt oculomotor responses. In Experiment 1, participants maintained central fixation while listening to number names. In Experiment 2, they made horizontal target-direct saccades following auditory number presentation. In both experiments, we continuously measured spontaneous ocular drift in horizontal space during and after number presentation. Experiment 2 also measured visual-probe-directed saccades following number presentation. Reliable ocular drift congruent with a horizontal mental number line emerged during and after number presentation in both experiments. Our results provide new evidence for the implicit and automatic nature of the oculomotor resonance effect associated with the horizontal spatial-numerical mapping mechanism.}, language = {en} } @article{MusolffSchmidtRodeetal.2016, author = {Musolff, Andreas and Schmidt, Christian and Rode, Michael and Lischeid, Gunnar and Weise, Stephan M. and Fleckenstein, Jan H.}, title = {Groundwater head controls nitrate export from an agricultural lowland catchment}, series = {Advances in water resources}, volume = {96}, journal = {Advances in water resources}, publisher = {Elsevier}, address = {Oxford}, issn = {0309-1708}, doi = {10.1016/j.advwatres.2016.07.003}, pages = {95 -- 107}, year = {2016}, abstract = {Solute concentration variability is of fundamental importance for the chemical and ecological state of streams. It is often closely related to discharge variability and can be characterized in terms of a solute export regime. Previous studies, especially in lowland catchments, report that nitrate is often exported with an accretion pattern of increasing concentrations with increasing discharge. Several modeling approaches exist to predict the export regime of solutes from the spatial relationship of discharge generating zones with solute availability in the catchment. For a small agriculturally managed lowland catchment in central Germany, we show that this relationship is controlled by the depth to groundwater table and its temporal dynamics. Principal component analysis of groundwater level time series from wells distributed throughout the catchment allowed derivation of a representative groundwater level time series that explained most of the discharge variability. Groundwater sampling revealed consistently decreasing nitrate concentrations with an increasing thickness of the unsaturated zone. The relationships of depth to groundwater table to discharge and to nitrate concentration were parameterized and integrated to successfully model catchment discharge and nitrate export on the basis of groundwater level variations alone. This study shows that intensive and uniform agricultural land use likely results in a clear and consistent concentration-depth relationship of nitrate, which can be utilized in simple approaches to predict stream nitrate export dynamics at the catchment scale. (C) 2016 Elsevier Ltd. All rights reserved.}, language = {en} } @book{MusilBurchard2016, author = {Musil, Andreas and Burchard, Daniel}, title = {Klausurenkurs im Europarecht}, series = {Schwerpunkt Klausurenkurs}, journal = {Schwerpunkt Klausurenkurs}, edition = {4., neu bearb Aufl.}, publisher = {M{\"u}ller}, address = {Heidelberg}, isbn = {978-3-8114-4316-7}, publisher = {Universit{\"a}t Potsdam}, pages = {456}, year = {2016}, abstract = {Jetzt mit zwei neuen F{\"a}llen! Die 4. Auflage enh{\"a}lt einen neuen Fall zum Datenschutzrecht und einen zus{\"a}tzlichen Fall zu sozialrechtlichen Aspekten des Europarechts. Die Konzeption: Dieser Klausurenkurs ist die optimale Erg{\"a}nzung zum Standardlehrbuch zum Europarecht von Streinz. Angesprochen werden neben den Studierenden des Schwerpunktbereichs Internationales Recht/Europarecht, (deren Bed{\"u}rfnisse durch das Buch in vollem Umfang abgedeckt werden) auch und insbesondere Pflichtfachstudierende. Sie erhalten das n{\"o}tige R{\"u}stzeug f{\"u}r examensrelevante Fragestellungen im Europarecht und erhalten einen Eindruck von der Vielfalt von Aufgabenstellungen, den unterschiedlichen Schwierigkeitsgraden sowie den damit verbundenen Erwartungshaltungen an den Klausurschreiber. Der Inhalt im Einzelnen: Der Band ist in drei Kapitel untergliedert. Zu Beginn werden die Arbeitsm{\"o}glichkeiten f{\"u}r die beiden angesprochenen Zielgruppen aufgezeigt. Im 2. Kapitel werden sodann auf abstrakter Ebene diejenigen Klausurkonstellationen dargestellt, die im Gemeinschaftsrecht relevant werden k{\"o}nnen. Hier findet der Leser den allgemeinen Zugang zu klausurrelevanten Fallgestaltungen. Den Kern des Buches bildet der Klausurenteil im 3. Kapitel. Er enth{\"a}lt 23 F{\"a}lle, welchen jeweils Leitentscheidungen des EuGH und anderer Gerichte zugrunde liegen. Die entschiedenen F{\"a}lle werden klausurtechnisch aufbereitet und um angrenzende Problempunkte erg{\"a}nzt, so dass jeweils komplette Klausuraufgaben entstehen. Die Verwendungsm{\"o}glichkeit als Pr{\"u}fungsleistung (Schwerpunkt- oder Pflichtfachklausur) wird im Rahmen der Vor{\"u}berlegungen zu jedem Fall erl{\"a}utert. Abgerundet wird der Klausurenteil durch entsprechende Pr{\"u}fungsschemata.}, language = {de} } @article{MuschallaLindenJoebges2016, author = {Muschalla, Beate and Linden, Michael and Joebges, Michael}, title = {Work-Anxiety and Sickness Absence After a Short Inpatient Cognitive Behavioral Group Intervention in Comparison to a Recreational Group Meeting}, series = {Journal of occupational and environmental medicine}, volume = {58}, journal = {Journal of occupational and environmental medicine}, publisher = {American Institute of Physics}, address = {Philadelphia}, issn = {1076-2752}, doi = {10.1097/JOM.0000000000000678}, pages = {398 -- 406}, year = {2016}, abstract = {Objective: The aim of this study was to study the effects of a short-term cognitive behavior therapy on work-anxiety and sickness-absence in patients with work-anxiety. Methods: Three-hundred forty-five inpatients who suffered from cardiologic, neurological, or orthopedic problems and additionally work-anxiety were randomly assigned into two different group interventions. Patients got four sessions of a group intervention, which either focused on cognitive behavior-therapy anxiety-management (work-anxiety coping group, WAG) or unspecific recreational activities (RG). Results: No differences were found between WAG and RG for work-anxiety and subjective work ability. When looking at patients who were suffering only from work-anxiety, and no additional mental disorder, the duration of sickness absence until 6 months follow-up was shorter in the WAG (WAG: 11 weeks, RG: 16 weeks, P = 0.050). Conclusion: A shortterm WAG may help return to work in patients with work-anxieties, as long as there is no comorbid mental disorder.}, language = {en} } @article{MuschallaFaySeemann2016, author = {Muschalla, Beate and Fay, Doris and Seemann, Anne}, title = {Asking for work adjustments or initiating behavioural changes - what study on the reactions towards colleagues with a personality disorder}, series = {Fundamenta informaticae}, volume = {21}, journal = {Fundamenta informaticae}, publisher = {IOS Press}, address = {Abingdon}, issn = {1354-8506}, doi = {10.1080/13548506.2015.1109671}, pages = {856 -- 862}, year = {2016}, abstract = {People with mental disorders, especially personality disorders, often face low acceptance at work. This is particularly problematic when returning to work after sick leave, because it impedes reintegration into the former workplace. This study explores colleagues' reactions towards a problematic worker dependent on the returning person's reintegration strategy: The returning person undertaking changes in their behaviour is compared with the person requesting adjustments of the workplace. In an experimental study, 188 employed persons read one of four vignettes that described a return-to-work-situation of a problematic co-worker. Across all vignettes, the co-worker was depicted as having previously caused problems in the work team. In the first vignette, the co-worker did not change anything (control condition) when she returned to work; in the second, she asked for workplace adjustments; in the third vignette she initiated efforts to change her own behaviour; and the fourth vignette combined both workplace adjustments and behavioural change. Study participants were asked for their reactions towards the problematic co-worker. Vignettes that included a behavioural change evoked more positive reactions towards the co-worker than vignettes without any behavioural change. Asking for workplace adjustments alone did not yield more positive reactions compared to not initiating any change. When preparing employees with interactional problems for their return to work, it is not effective to only instruct them on their statutory entitlement for workplace adjustments. Instead, it is advisable to encourage them to proactively strive for behaviour changes.}, language = {en} } @article{MuschallaFayLinden2016, author = {Muschalla, Beate and Fay, Doris and Linden, M.}, title = {Self-reported workplace perception as indicators of work anxieties}, series = {Occupational medicine}, volume = {66}, journal = {Occupational medicine}, publisher = {Oxford Univ. Press}, address = {Oxford}, issn = {0962-7480}, doi = {10.1093/occmed/kqv160}, pages = {168 -- 170}, year = {2016}, abstract = {Work anxiety is a potentially disabling mental health problem, which can cause (long-term) sickness absence. In many cases patients do not openly report their anxieties and tend to give externalizing explanations of inner problems. Therefore people with work anxiety may perceive their workplace more negatively than those without such anxiety. To investigate the relation between subjective work description and work anxiety. There were 148 inpatient participants and 8015 general population controls. Patients with work anxiety described their workplace significantly more negatively than patients without work anxiety and employees in the general population, with no differences in workplace descriptions between psychosomatic patients without work anxiety and the general population sample. The type of complaint about work conditions was related to the specific type of work anxiety. Reports about workplace burdens can be indicative of work anxiety and should prompt further in-depth assessments. The content of complaints about work conditions may point to the type of underlying work anxiety.}, language = {en} } @article{MuschallaFayHoffmann2016, author = {Muschalla, Beate and Fay, Doris and Hoffmann, Karin}, title = {Inventory for Job Coping and Return Intention (JoCoRi)}, series = {Diagnostica}, volume = {62}, journal = {Diagnostica}, publisher = {Frontiers Research Foundation}, address = {G{\"o}ttingen}, issn = {0012-1924}, doi = {10.1026/0012-1924/a000146}, pages = {143 -- 156}, year = {2016}, abstract = {Ein großer Anteil der Erwerbst{\"a}tigen ist aufgrund gesundheitlicher Einschr{\"a}nkungen einmalig oder mehrfach in seiner Berufsbiografie l{\"a}ngere Zeit arbeitsunf{\"a}hig. Auf Grundlage etablierter psychologischer Konstrukte und empirischer Befunde wurde ein spezifisch arbeitsbezogenes Inventar f{\"u}r Job-Coping und R{\"u}ckkehrintention (JoCoRi) entwickelt. Der Selbsteinsch{\"a}tzungsfragebogen wurde an drei unabh{\"a}ngigen Stichproben (N = 243, N = 337, N = 111) von Rehabilitationspatienten aus Psychosomatik, Orthop{\"a}die, Kardiologie und Neurologie gepr{\"u}ft. Faktorenanalytische Ergebnisse der ersten Stichprobe best{\"a}tigen eine mehrfaktorielle Struktur. Das Inventar enth{\"a}lt 30 Items in 7 Skalen: 1. Arbeitsbezogene R{\"u}ckkehrintention und -planung, 2. Arbeitsbezogene Selbstwirksamkeitserwartung, 3. Arbeitsbezogene Selbstberuhigung und Selbstinstruktion, 4. Arbeitsbezogene externale Kontroll{\"u}berzeugung, 5. Aktives Coping am Arbeitsplatz, 6. Bedeutung der Arbeit, 7. Kontroll{\"u}berzeugung bzgl. der Arbeitsaufnahme. Die Varianzaufkl{\"a}rung liegt bei 68 \%. 25 Items haben Hauptladungen > .60. Interne Konsistenzen und Trennsch{\"a}rfen sind {\"u}berwiegend zufriedenstellend. Die Modellg{\"u}te der konfirmatorischen Faktorenanalyse ist {\"u}berzeugend. Das Modell ist in einer unabh{\"a}ngigen Stichprobe stabil (N = 337). Die Skalen wurden mit inhaltlich analogen Globalkonstrukten validiert. Die mehrfaktorielle Struktur kann in der zweiten Stichprobe repliziert werden. Eine l{\"a}ngsschnittliche Analyse der dritten Stichprobe pr{\"u}ft die pr{\"a}diktive Validit{\"a}t der R{\"u}ckkehrintentionsskala; sie wird hinsichtlich Arbeitsunf{\"a}higkeitsdauer und Arbeitsf{\"a}higkeitsstatus best{\"a}tigt.}, language = {de} } @article{Muschalla2016, author = {Muschalla, Beate}, title = {Different work capacity impairments in patients with different work-anxieties}, series = {International archives of occupational and environmental health}, volume = {89}, journal = {International archives of occupational and environmental health}, publisher = {Springer}, address = {New York}, issn = {0340-0131}, doi = {10.1007/s00420-015-1099-x}, pages = {609 -- 619}, year = {2016}, abstract = {Purpose Persons with work-anxieties are especially endangered for work capacity impairment and sick leave. Work capacity impairment is not directly due to symptoms but due to illness-related capacity disorders. Work capacity impairments can be described on different dimensions (e.g., social interaction, decision making and judgment, endurance, mobility). Understanding the type of work capacity impairment is important for reintegration interventions. This is the first study to investigate work capacity impairment in risk patients with different work-anxieties. Results Patients with different work-anxieties were impaired in different capacity dimensions: Work-related social anxiety went along with clinically relevant impairment in capacity of assertiveness (M = 2.40), anxiety of insufficiency went along with impaired capacity of endurance (M = 2.20), and work-related generalized worrying was accompanied by impairment in the capacity for decision making (M = 1.82). Specific capacity impairment dimensions were related to sick leave duration, while a global work ability prognosis was not. Conclusions The capacity approach is useful to describe work impairment more precisely and beyond symptoms. On this basis, reintegration-focusing interventions such as capacity training (e.g., social interaction training) or work adjustment (e.g., reducing exposure with interactional work tasks) can be initiated.}, language = {en} } @article{Muschalla2016, author = {Muschalla, Beate}, title = {Negative work perception not changed in a short work-anxiety-coping group therapy intervention}, series = {International journal of occupational and environmental health}, volume = {22}, journal = {International journal of occupational and environmental health}, publisher = {Frontiers Research Foundation}, address = {Abingdon}, issn = {1077-3525}, doi = {10.1080/10773525.2016.1238663}, pages = {321 -- 324}, year = {2016}, abstract = {Background: Work anxiety is often associated with long-term sick leave and requires early intervention. Work anxieties are associated with negative work perception. Therefore, one aim in early intervention is a cognitive reframing of dysfunctional perceptions of workplace characteristics. Methods: A psychotherapeutic specialist conducted two group programs of four sessions each. One hundred twenty-three rehabilitation in-patients with work anxieties were randomly assigned either to a work anxiety-coping group or to a recreational group. The Short Questionnaire for Work Analysis (KFZA) was administered before and after the group treatment to measure perceptions of working conditions. Results: Participants from the work anxiety-coping group did not see their work in a significantly more positive light at the end of the intervention compared to participants from the recreational group. Conclusions: A short work anxiety-coping group did not initiate a consistent positive re-appraisal of work. Employers and occupational physicians should not expect positive changes of work perception when an employee returns from short medical rehabilitation including work-directed treatment. Additional support from the workplace must be considered, e.g. employer-physician-employee conversation preceding return to work, or (temporary) work adjustment.}, language = {en} } @misc{MurawskiBuergerVorogushynetal.2016, author = {Murawski, Aline and B{\"u}rger, Gerd and Vorogushyn, Sergiy and Merz, Bruno}, title = {Can local climate variability be explained by weather patterns?}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {525}, issn = {1866-8372}, doi = {10.25932/publishup-41015}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-410155}, pages = {24}, year = {2016}, abstract = {To understand past flood changes in the Rhine catchment and in particular the role of anthropogenic climate change in extreme flows, an attribution study relying on a proper GCM (general circulation model) downscaling is needed. A downscaling based on conditioning a stochastic weather generator on weather patterns is a promising approach. This approach assumes a strong link between weather patterns and local climate, and sufficient GCM skill in reproducing weather pattern climatology. These presuppositions are unprecedentedly evaluated here using 111 years of daily climate data from 490 stations in the Rhine basin and comprehensively testing the number of classification parameters and GCM weather pattern characteristics. A classification based on a combination of mean sea level pressure, temperature, and humidity from the ERA20C reanalysis of atmospheric fields over central Europe with 40 weather types was found to be the most appropriate for stratifying six local climate variables. The corresponding skill is quite diverse though, ranging from good for radiation to poor for precipitation. Especially for the latter it was apparent that pressure fields alone cannot sufficiently stratify local variability. To test the skill of the latest generation of GCMs from the CMIP5 ensemble in reproducing the frequency, seasonality, and persistence of the derived weather patterns, output from 15 GCMs is evaluated. Most GCMs are able to capture these characteristics well, but some models showed consistent deviations in all three evaluation criteria and should be excluded from further attribution analysis.}, language = {en} } @article{MurawskiBuergerVorogushynetal.2016, author = {Murawski, Aline and B{\"u}rger, Gerd and Vorogushyn, Sergiy and Merz, Bruno}, title = {Can local climate variability be explained by weather patterns? A multi-station evaluation for the Rhine basin}, series = {Hydrology and earth system sciences : HESS}, volume = {20}, journal = {Hydrology and earth system sciences : HESS}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1027-5606}, doi = {10.5194/hess-20-4283-2016}, pages = {4283 -- 4306}, year = {2016}, abstract = {To understand past flood changes in the Rhine catchment and in particular the role of anthropogenic climate change in extreme flows, an attribution study relying on a proper GCM (general circulation model) downscaling is needed. A downscaling based on conditioning a stochastic weather generator on weather patterns is a promising approach. This approach assumes a strong link between weather patterns and local climate, and sufficient GCM skill in reproducing weather pattern climatology. These presuppositions are unprecedentedly evaluated here using 111 years of daily climate data from 490 stations in the Rhine basin and comprehensively testing the number of classification parameters and GCM weather pattern characteristics. A classification based on a combination of mean sea level pressure, temperature, and humidity from the ERA20C reanalysis of atmospheric fields over central Europe with 40 weather types was found to be the most appropriate for stratifying six local climate variables. The corresponding skill is quite diverse though, ranging from good for radiation to poor for precipitation. Especially for the latter it was apparent that pressure fields alone cannot sufficiently stratify local variability. To test the skill of the latest generation of GCMs from the CMIP5 ensemble in reproducing the frequency, seasonality, and persistence of the derived weather patterns, output from 15 GCMs is evaluated. Most GCMs are able to capture these characteristics well, but some models showed consistent deviations in all three evaluation criteria and should be excluded from further attribution analysis.}, language = {en} } @article{MunzOswaldSchmidt2016, author = {Munz, Matthias and Oswald, Sascha and Schmidt, Christian}, title = {Analysis of riverbed temperatures to determine the geometry of subsurface water flow around in-stream geomorphological structures}, series = {Journal of hydrology}, volume = {539}, journal = {Journal of hydrology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0022-1694}, doi = {10.1016/j.jhydrol.2016.05.012}, pages = {74 -- 87}, year = {2016}, abstract = {The analytical evaluation of diurnal temperature variation in riverbed sediments provides detailed information on exchange fluxes between rivers and groundwater. The underlying assumption of the stationary, one-dimensional vertical flow field is frequently violated in natural systems where subsurface water flow often has a significant horizontal component. In this paper, we present a new methodology for identifying the geometry of the subsurface flow field using vertical temperature profiles. The statistical analyses are based on model optimisation and selection and are used to evaluate the shape of vertical amplitude ratio profiles. The method was applied to multiple profiles measured around in-stream geomorphological structures in a losing reach of a gravel bed river. The predominant subsurface flow field was systematically categorised in purely vertical and horizontal (hyporheic, parafluvial) components. The results highlight that river groundwater exchange flux at the head, crest and tail of geomorphological structures significantly deviated from the one-dimensional vertical flow, due to a significant horizontal component. The geometry of the subsurface water flow depended on the position around the geomorphological structures and on the river level. The methodology presented in this paper features great potential for characterising the spatial patterns and temporal dynamics of complex subsurface flow geometries by using measured temperature time series in vertical profiles. (C) 2016 Elsevier B.V. All rights reserved.}, language = {en} } @article{MunackBloetheFueloepetal.2016, author = {Munack, Henry and Bl{\"o}the, Jan Henrik and F{\"u}l{\"o}p, R. H. and Codilean, Alexandru T. and Fink, D. and Korup, Oliver}, title = {Recycling of Pleistocene valley fills dominates 135 ka of sediment flux, upper Indus River}, series = {Quaternary science reviews : the international multidisciplinary research and review journal}, volume = {149}, journal = {Quaternary science reviews : the international multidisciplinary research and review journal}, publisher = {Elsevier}, address = {Oxford}, issn = {0277-3791}, doi = {10.1016/j.quascirev.2016.07.030}, pages = {122 -- 134}, year = {2016}, language = {en} } @article{MummIpsenHermanussen2016, author = {Mumm, Rebekka and Ipsen, Marie Josephin and Hermanussen, Michael}, title = {The association of weight, weight variability and socioeconomic situation among children}, series = {European journal of clinical nutrition}, volume = {70}, journal = {European journal of clinical nutrition}, publisher = {Nature Publ. Group}, address = {London}, issn = {0954-3007}, doi = {10.1038/ejcn.2016.21}, pages = {650 -- 652}, year = {2016}, abstract = {BACKGROUND/OBJECTIVES: We studied the association of body weight and weight variability among populations from different geographic, historic and socioeconomic background. SUBJECTS/METHODS: We reanalyzed data from 833 growth studies of 78 different countries from 1920 to 2013. We used data from two age groups-infants (age 2 years) and juvenile (age 7 years)-and divided the studies into two geographic-socioeconomic groups. RESULTS: Multiple regressions showed significant interactions between weight, sex, historic year of study, continent and within-study standard deviation. Multiple regression revealed R-2 = 0.256 (P<0.001) at age 2 years and R-2 = 0.478 (P<0.001) at age 7 years. Although infants and juveniles in more affluent countries are heavier than children in less affluent countries (P<0.001), the within-study standard deviation of the two geographic-socioeconomic groups differs at age 7 years (P<0.001) but not at age 2 years (P>0.15). CONCLUSIONS: The general impression that prosperous conditions lead to growth improvements in height and weight appears to be true only at a large scale: wealthy countries have tall and heavy children. At small scale, the situation is different. Whereas economic and nutritional improvements can exhibit substantial effects in weight gains, the discrepancy between the within-population variation in height and weight strongly suggests that height gains and weight gains are subject to different regulations.}, language = {en} } @article{MummHermanussenScheffler2016, author = {Mumm, Rebekka and Hermanussen, Michael and Scheffler, Christiane}, title = {voice break as the marker of biological age}, series = {Acta paediatrica : nurturing the child}, volume = {105}, journal = {Acta paediatrica : nurturing the child}, publisher = {Wiley-Blackwell}, address = {Hoboken}, issn = {0803-5253}, doi = {10.1111/apa.13488}, pages = {e459 -- e463}, year = {2016}, abstract = {Aim: We aimed to develop the first references for body height, body weight and body mass index (BMI) for boys based on the individual developmental tempo with respect to their voice break status. Methods: We re-analysed data from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS study) on body height, body weight and body mass index based on the voice break, or mutation, in 3956 boys aged 10-17 years. We used the LMS method to construct smoothed references centiles for the studied variables in premutational, mutational and postmutational boys. Results: Body height, body weight and BMI differed significantly (p < 0.001) between the different stages of voice break. On average, boys were 5.9 cm taller, 5.8 kg heavier and had a 0.7 kg/m(2) higher BMI with every higher stage of voice break. Currently used growth references for chronological age in comparison with maturity-related references led to an average of 5.4\% of boys being falsely classified as overweight.}, language = {en} } @article{MuinodeBruijnPajoroetal.2016, author = {Muino, Jose M. and de Bruijn, Suzanne and Pajoro, Alice and Geuten, Koen and Vingron, Martin and Angenent, Gerco C. and Kaufmann, Kerstin}, title = {Evolution of DNA-Binding Sites of a Floral Master Regulatory Transcription Factor}, series = {Molecular biology and evolution}, volume = {33}, journal = {Molecular biology and evolution}, publisher = {Oxford Univ. Press}, address = {Oxford}, issn = {0737-4038}, doi = {10.1093/molbev/msv210}, pages = {185 -- 200}, year = {2016}, abstract = {Flower development is controlled by the action of key regulatory transcription factors of the MADS-domain family. The function of these factors appears to be highly conserved among species based on mutant phenotypes. However, the conservation of their downstream processes is much less well understood, mostly because the evolutionary turnover and variation of their DNA-binding sites (BSs) among plant species have not yet been experimentally determined. Here, we performed comparative ChIP (chromatin immunoprecipitation)-seq experiments of the MADS-domain transcription factor SEPALLATA3 (SEP3) in two closely related Arabidopsis species: Arabidopsis thaliana and A. lyrata which have very similar floral organ morphology. We found that BS conservation is associated with DNA sequence conservation, the presence of the CArG-box BS motif and on the relative position of the BS to its potential target gene. Differences in genome size and structure can explain that SEP3 BSs in A. lyrata can be located more distantly to their potential target genes than their counterparts in A. thaliana. In A. lyrata, we identified transposition as a mechanism to generate novel SEP3 binding locations in the genome. Comparative gene expression analysis shows that the loss/gain of BSs is associated with a change in gene expression. In summary, this study investigates the evolutionary dynamics of DNA BSs of a floral key-regulatory transcription factor and explores factors affecting this phenomenon.}, language = {en} } @article{MuellerCarlsohnMuelleretal.2016, author = {Mueller, Steffen and Carlsohn, Anja and Mueller, Juliane and Baur, Heiner and Mayer, Frank}, title = {Influence of Obesity on Foot Loading Characteristics in Gait for Children Aged 1 to 12 Years}, series = {PLoS one}, volume = {11}, journal = {PLoS one}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0149924}, pages = {1710 -- 1717}, year = {2016}, abstract = {Background Overweight and obesity are increasing health problems that are not restricted to adults only. Childhood obesity is associated with metabolic, psychological and musculoskeletal comorbidities. However, knowledge about the effect of obesity on the foot function across maturation is lacking. Decreased foot function with disproportional loading characteristics is expected for obese children. The aim of this study was to examine foot loading characteristics during gait of normal-weight, overweight and obese children aged 1-12 years. Methods Results Mean walking velocity was 0.95 +/- 0.25 m/s with no differences between normal-weight, overweight or obese children (p = 0.0841). Results show higher foot contact area, arch index, peak pressure and force time integral in overweight and obese children (p< 0.001). Obese children showed the 1.48-fold (1 year-old) to 3.49-fold (10 year-old) midfoot loading (FTI) compared to normal-weight. Conclusion Additional body mass leads to higher overall load, with disproportional impact on the midfoot area and longitudinal foot arch showing characteristic foot loading patterns. Already the feet of one and two year old children are significantly affected. Childhood overweight and obesity is not compensated by the musculoskeletal system. To avoid excessive foot loading with potential risk of discomfort or pain in childhood, prevention strategies should be developed and validated for children with a high body mass index and functional changes in the midfoot area. The presented plantar pressure values could additionally serve as reference data to identify suspicious foot loading patterns in children.}, language = {en} } @phdthesis{Mueller2016, author = {Mueller, Stefanie}, title = {Interacting with personal fabrication devices}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-100908}, school = {Universit{\"a}t Potsdam}, pages = {xxi, 108}, year = {2016}, abstract = {Personal fabrication tools, such as 3D printers, are on the way of enabling a future in which non-technical users will be able to create custom objects. However, while the hardware is there, the current interaction model behind existing design tools is not suitable for non-technical users. Today, 3D printers are operated by fabricating the object in one go, which tends to take overnight due to the slow 3D printing technology. Consequently, the current interaction model requires users to think carefully before printing as every mistake may imply another overnight print. Planning every step ahead, however, is not feasible for non-technical users as they lack the experience to reason about the consequences of their design decisions. In this dissertation, we propose changing the interaction model around personal fabrication tools to better serve this user group. We draw inspiration from personal computing and argue that the evolution of personal fabrication may resemble the evolution of personal computing: Computing started with machines that executed a program in one go before returning the result to the user. By decreasing the interaction unit to single requests, turn-taking systems such as the command line evolved, which provided users with feedback after every input. Finally, with the introduction of direct-manipulation interfaces, users continuously interacted with a program receiving feedback about every action in real-time. In this dissertation, we explore whether these interaction concepts can be applied to personal fabrication as well. We start with fabricating an object in one go and investigate how to tighten the feedback-cycle on an object-level: We contribute a method called low-fidelity fabrication, which saves up to 90\% fabrication time by creating objects as fast low-fidelity previews, which are sufficient to evaluate key design aspects. Depending on what is currently being tested, we propose different conversions that enable users to focus on different parts: faBrickator allows for a modular design in the early stages of prototyping; when users move on WirePrint allows quickly testing an object's shape, while Platener allows testing an object's technical function. We present an interactive editor for each technique and explain the underlying conversion algorithms. By interacting on smaller units, such as a single element of an object, we explore what it means to transition from systems that fabricate objects in one go to turn-taking systems. We start with a 2D system called constructable: Users draw with a laser pointer onto the workpiece inside a laser cutter. The drawing is captured with an overhead camera. As soon as the the user finishes drawing an element, such as a line, the constructable system beautifies the path and cuts it--resulting in physical output after every editing step. We extend constructable towards 3D editing by developing a novel laser-cutting technique for 3D objects called LaserOrigami that works by heating up the workpiece with the defocused laser until the material becomes compliant and bends down under gravity. While constructable and LaserOrigami allow for fast physical feedback, the interaction is still best described as turn-taking since it consists of two discrete steps: users first create an input and afterwards the system provides physical output. By decreasing the interaction unit even further to a single feature, we can achieve real-time physical feedback: Input by the user and output by the fabrication device are so tightly coupled that no visible lag exists. This allows us to explore what it means to transition from turn-taking interfaces, which only allow exploring one option at a time, to direct manipulation interfaces with real-time physical feedback, which allow users to explore the entire space of options continuously with a single interaction. We present a system called FormFab, which allows for such direct control. FormFab is based on the same principle as LaserOrigami: It uses a workpiece that when warmed up becomes compliant and can be reshaped. However, FormFab achieves the reshaping not based on gravity, but through a pneumatic system that users can control interactively. As users interact, they see the shape change in real-time. We conclude this dissertation by extrapolating the current evolution into a future in which large numbers of people use the new technology to create objects. We see two additional challenges on the horizon: sustainability and intellectual property. We investigate sustainability by demonstrating how to print less and instead patch physical objects. We explore questions around intellectual property with a system called Scotty that transfers objects without creating duplicates, thereby preserving the designer's copyright.}, language = {en} } @article{MuellerHeinickeJuschusetal.2016, author = {Mueller, R. and Heinicke, T. and Juschus, O. and Zeitz, Jutta}, title = {Genesis and abiotic characteristics of three high-altitude peatlands in the Tien Shan Mountains (Kyrgyzstan), with focus on silty peatland substrates}, series = {Mires and peat}, volume = {18}, journal = {Mires and peat}, publisher = {International Peat Society}, address = {Dundee}, issn = {1819-754X}, doi = {10.19189/MaP.2015.OMB.217}, pages = {19}, year = {2016}, abstract = {Peatlands are scarce and threatened ecosystems in the semiarid region of Kyrgyzstan. Knowledge about the Kyrgyz peatlands is still poor and, especially, their genesis has hardly been investigated so far. Typically, the peatland substrates are characterised by the admixture of silt-sized particles in various quantities. In this work we report the abiotic properties and genesis of three peatlands within different altitudinal zones in southern Kyrgyzstan. We surveyed the stratification of the peatlands and their water chemistry. In addition, we investigated whether the silt found in the peatland substrates was deposited by wind, rivers or springs. The mineral constituents of the peatland substrates were analysed for particle size distribution and their elemental composition was compared with that of nearby loess, river and spring sediments using the immobile trace element titanium. One peatland shows a high abundance of different peatland substrates, indicating a frequent change of ecological conditions in the past. All three peatlands are fed by groundwater. Overgrazing and trampling by cattle has led to recent degradation of the upper peat layer. The resulting compaction of the peats prevents water from seeping into the substrates of the peatlands and subsequently changes their hydrology. Our results indicate that both wind and rivers have deposited silt in the peatlands, depending on their positions in the relief. Silts may also have been relocated by springs within the peatlands.}, language = {en} } @article{MuellerNanovaGlaseretal.2016, author = {Mueller, Lars and Nanova, Diana and Glaser, Tobias and Beck, Sebastian and Pucci, Annemarie and Kast, Anne K. and Schroeder, Rasmus R. and Mankel, Eric and Pingel, Patrick and Neher, Dieter and Kowalsky, Wolfgang and Lovrincic, Robert}, title = {Charge-Transfer-Solvent Interaction Predefines Doping Efficiency in p-Doped P3HT Films}, series = {Chemistry of materials : a publication of the American Chemical Society}, volume = {28}, journal = {Chemistry of materials : a publication of the American Chemical Society}, publisher = {American Chemical Society}, address = {Washington}, issn = {0897-4756}, doi = {10.1021/acs.chemmater.6b01629}, pages = {4432 -- 4439}, year = {2016}, abstract = {Efficient electrical doping of organic semiconductors is a necessary prerequisite for the fabrication of high performance organic electronic devices. In this work, we study p-type doping of poly(3-hexylthiophene) (P3HT) with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F(4)TCNQ) spin-cast from two different solvents. Using electron diffraction, we find strong dopant-induced pi-pi-stacking for films from the solvent chloroform, but not from chlorobenzene. This image is confirmed and expanded by the analysis of vibrational features of P3HT and polaron absorptions using optical spectroscopy. Here, a red-shifted polaron absorption is found in doped films from chloroform, caused by a higher conjugation length of the polymer backbone. These differences result in a higher conductivity of films from chloroform. We use optical spectroscopy on the corresponding blend solutions to shed light on the origin of this effect and propose a model to explain why solutions of doped P3HT reveal more aggregation of charged molecules in chlorobenzene, whereas more order is finally observed in dried films from chloroform. Our study emphasizes the importance of solvent parameters exceeding the bare solubility of pure dopant and host material for the preparation of highly conductive doped films.}, language = {en} } @article{MuellerEngelMuelleretal.2016, author = {Mueller, Juliane and Engel, Tilman and Mueller, Steffen and Kopinski, Stephan and Baur, Heiner and Mayer, Frank}, title = {Neuromuscular response of the trunk to sudden gait disturbances: Forward vs. backward perturbation}, series = {Journal of electromyography and kinesiology}, volume = {30}, journal = {Journal of electromyography and kinesiology}, publisher = {Elsevier}, address = {Oxford}, issn = {1050-6411}, doi = {10.1016/j.jelekin.2016.07.005}, pages = {168 -- 176}, year = {2016}, abstract = {The study aimed to analyse neuromuscular activity of the trunk comparing four different perturbations during gait. Thirteen subjects (28 +/- 3 yrs) walked (1 m/s) on a split-belt treadmill, while 4 (belt) perturbations (F1, F2, B1, B2) were randomly applied. Perturbations differed, related to treadmill belt translation, in direction (forward (F)/backward (B)) and amplitude (20 m/s(2) (1)/40 m/s(2) (2)). Trunk muscle activity was assessed with a 12-lead-EMG. EMG-RMS [\%] (0-200 ms after perturbation; normalized to RMS of normal gait) was analyzed for muscles and four trunk areas (ventral left/right; dorsal left/right). Ratio of ventral: dorsal muscles were calculated. Muscle onset [ms] was determined. Data analysis was conducted descriptively, followed by ANOVA (post hoc Tukey-Kramer (alpha = 0.05)). All perturbations lead to an increase in EMG-RMS (428 +/- 289\%). F1 showed the lowest and F2 the highest increase for the flexors. B2 showed the highest increase for the extensors. Significant differences between perturbations could be observed for 6 muscles, as well as the 4 trunk areas. Ratio analysis revealed no significant differences (range 1.25 (B1) to 1.71 (F2) between stimuli. Muscle response time (ventral: 87.0 +/- 21.7 ms; dorsal: 88.4 +/- 17.0 ms) between stimuli was only significant (p = 0.005) for the dorsal muscles. Magnitude significantly influences neuromuscular trunk response patterns in healthy adults. Regardless of direction ventral muscles always revealed higher relative increase of activity while compensating the walking perturbations. (C) 2016 Elsevier Ltd. All rights reserved.}, language = {en} } @article{MoserMaderTschakertetal.2016, author = {Moser, Othmar and Mader, Julia K. and Tschakert, Gerhard and Mueller, Alexander and Groeschl, Werner and Pieber, Thomas R. and Koehler, Gerd and Messerschmidt, Janin and Hofmann, Peter}, title = {Accuracy of Continuous Glucose Monitoring (CGM) during Continuous and High-Intensity Interval Exercise in Patients with Type 1 Diabetes Mellitus}, series = {Nutrients}, volume = {8}, journal = {Nutrients}, publisher = {MDPI}, address = {Basel}, issn = {2072-6643}, doi = {10.3390/nu8080489}, pages = {15}, year = {2016}, abstract = {Continuous exercise (CON) and high-intensity interval exercise (HIIE) can be safely performed with type 1 diabetes mellitus (T1DM). Additionally, continuous glucose monitoring (CGM) systems may serve as a tool to reduce the risk of exercise-induced hypoglycemia. It is unclear if CGM is accurate during CON and HIIE at different mean workloads. Seven T1DM patients performed CON and HIIE at 5\% below (L) and above (M) the first lactate turn point (LTP1), and 5\% below the second lactate turn point (LTP2) (H) on a cycle ergometer. Glucose was measured via CGM and in capillary blood (BG). Differences were found in comparison of CGM vs. BG in three out of the six tests (p < 0.05). In CON, bias and levels of agreement for L, M, and H were found at: 0.85 (-3.44, 5.15) mmol.L-1, -0.45 (-3.95, 3.05) mmol.L-1, -0.31 (-8.83, 8.20) mmol.L-1 and at 1.17 (-2.06, 4.40) mmol.L-1, 0.11 (-5.79, 6.01) mmol.L-1, 1.48 (-2.60, 5.57) mmol.L-1 in HIIE for the same intensities. Clinically-acceptable results (except for CON H) were found. CGM estimated BG to be clinically acceptable, except for CON H. Additionally, using CGM may increase avoidance of exercise-induced hypoglycemia, but usual BG control should be performed during intense exercise.}, language = {en} }