TY - JOUR A1 - Ewald, Michael A1 - Igel, Heiner A1 - Hinzen, Klaus-Günther A1 - Scherbaum, Frank T1 - Basin-related effects on ground motion for earthquake scenarios in the Lower Rhine Embayment N2 - The deterministic calculation of earthquake scenarios using complete waveform modelling plays an increasingly important role in estimating shaking hazard in seismically active regions. Here we apply 3-D numerical modelling of seismic wave propagation to M 6+ earthquake scenarios in the area of the Lower Rhine Embayment, one of the seismically most active regions in central Europe. Using a 3-D basin model derived from geology, borehole information and seismic experiments, we aim at demonstrating the strong dependence of ground shaking on hypocentre location and basin structure. The simulations are carried out up to frequencies of ca. 1 Hz. As expected, the basin structure leads to strong lateral variations in peak ground motion, amplification and shaking duration. Depending on source-basin-receiver geometry, the effects correlate with basin depth and the slope of the basin flanks; yet, the basin also affects peak ground motion and estimated shaking hazard thereof outside the basin. Comparison with measured seismograms for one of the earthquakes shows that some of the main characteristics of the wave motion are reproduced. Cumulating the derived seismic intensities from the three modelled earthquake scenarios leads to a predominantly basin correlated intensity distribution for our study area Y1 - 2006 UR - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-246X U6 - https://doi.org/10.1111/j.1365-246X.2006.02909.x SN - 0956-540X ER - TY - JOUR A1 - Wetterich, Sebastian A1 - Schirrmeiste, Lutz A1 - Nazarova, Larisa B. A1 - Palagushkina, Olga A1 - Bobrov, Anatoly A1 - Pogosyan, Lilit A1 - Savelieva, Larisa A1 - Syrykh, Liudmila A1 - Matthes, Heidrun A1 - Fritz, Michael A1 - Günther, Frank A1 - Opel, Thomas A1 - Meyer, Hanno T1 - Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia) JF - Permafrost and Periglacial Processes N2 - Ground ice and sedimentary records of a pingo exposure reveal insights into Holocene permafrost, landscape and climate dynamics. Early to mid-Holocene thermokarst lake deposits contain rich floral and faunal paleoassemblages, which indicate lake shrinkage and decreasing summer temperatures (chironomid-based T-July) from 10.5 to 3.5 cal kyr BP with the warmest period between 10.5 and 8 cal kyr BP. Talik refreezing and pingo growth started about 3.5 cal kyr BP after disappearance of the lake. The isotopic composition of the pingo ice (delta O-18 - 17.1 +/- 0.6 parts per thousand, delta D -144.5 +/- 3.4 parts per thousand, slope 5.85, deuterium excess -7.7 +/- 1.5 parts per thousand) point to the initial stage of closed-system freezing captured in the record. A differing isotopic composition within the massive ice body was found (delta O-18 - 21.3 +/- 1.4 parts per thousand, delta D -165 +/- 11.5 parts per thousand, slope 8.13, deuterium excess 4.9 +/- 3.2 parts per thousand), probably related to the infill of dilation cracks by surface water with quasi-meteoric signature. Currently inactive syngenetic ice wedges formed in the thermokarst basin after lake drainage. The pingo preserves traces of permafrost response to climate variations in terms of ground-ice degradation (thermokarst) during the early and mid-Holocene, and aggradation (wedge-ice and pingo-ice growth) during the late Holocene. KW - bioindicators KW - cryolithology KW - hydrochemistry KW - Khalerchinskaya tundra KW - stable water isotopes Y1 - 2018 U6 - https://doi.org/10.1002/ppp.1979 SN - 1045-6740 SN - 1099-1530 VL - 29 IS - 3 SP - 182 EP - 198 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Ristow, Michael A1 - Herrmann, Andreas A1 - Illig, Hubert A1 - Klemm, Gunther A1 - Kummer, Volker A1 - Kläge, Hans-Christian A1 - Machatzi, Bernd A1 - Raetzel, Stefan A1 - Schwarz, R. A1 - Zimmermann, Friedrich T1 - Liste und Rote Liste der etablierten Gefäßpflanzen Brandenburgs Y1 - 2006 ER - TY - JOUR A1 - Prasse, Rüdiger A1 - Ristow, Michael A1 - Klemm, Gunther A1 - Machatzi, Bernd A1 - Raus, Thomas A1 - Scholz, Hildemar A1 - Stohr, Gerrit A1 - Sukopp, Herbert A1 - Zimmermann, Friedrich T1 - Liste der wildwachsenden Gefäßpflanzen des Landes Berlin : mit Roter Liste Y1 - 2001 SN - 3-88961-137-0 PB - Kulturbuch-Verl. CY - Berlin ER - TY - JOUR A1 - Seitz, Birgit A1 - Ristow, Michael A1 - Klemm, Gunther A1 - Rätzel, Stefan A1 - Schulze, Gerhart A1 - Hoffmann, Maik T1 - Zur Verbreitung der Wildrosen und verwilderten Kulturrosen in Berlin und Brandenburg Y1 - 2004 SN - 0724-3111 - ER - TY - JOUR A1 - Stahl, Bernd A1 - Thurl, Stephan A1 - Zeng, Jianru A1 - Karas, Michael A1 - Hillenkamp, Franz A1 - Steup, Martin A1 - Sawatzki, Günther T1 - Oligosaccharides from human milk as revealed by matrix-assisted laser desorption : ionization mass spectrometry Y1 - 1994 ER - TY - JOUR A1 - Kellmann, Michael A1 - Kallus, K. W. A1 - Günther, K.-D. A1 - Lormes, W. A1 - Steinacker, J. M. T1 - Psychologische Betreuung der Junioren-Nationalmannschaft des Deutschen Ruderverbandes Y1 - 1997 SN - 0945-6031 ER - TY - JOUR A1 - Gerhardt, Matthias A1 - Ecke, Mary A1 - Walz, Michael A1 - Stengl, Andreas A1 - Beta, Carsten A1 - Gerisch, Günther T1 - Actin and PIP3 waves in giant cells reveal the inherent length scale of an excited state JF - Journal of cell science N2 - The membrane and actin cortex of a motile cell can autonomously differentiate into two states, one typical of the front, the other of the tail. On the substrate-attached surface of Dictyostelium discoideum cells, dynamic patterns of front-like and tail-like states are generated that are well suited to monitor transitions between these states. To image large-scale pattern dynamics independently of boundary effects, we produced giant cells by electric-pulse-induced cell fusion. In these cells, actin waves are coupled to the front and back of phosphatidylinositol (3,4,5)-trisphosphate (PIP3)-rich bands that have a finite width. These composite waves propagate across the plasma membrane of the giant cells with undiminished velocity. After any disturbance, the bands of PIP3 return to their intrinsic width. Upon collision, the waves locally annihilate each other and change direction; at the cell border they are either extinguished or reflected. Accordingly, expanding areas of progressing PIP3 synthesis become unstable beyond a critical radius, their center switching from a front-like to a tail-like state. Our data suggest that PIP3 patterns in normal-sized cells are segments of the self-organizing patterns that evolve in giant cells. KW - Actin waves KW - PIP3 signals KW - Excitable systems KW - Cell polarity KW - Cell fusion Y1 - 2014 U6 - https://doi.org/10.1242/jcs.156000 SN - 0021-9533 SN - 1477-9137 VL - 127 IS - 20 SP - 4507 EP - 4517 PB - Company of Biologists Limited CY - Cambridge ER - TY - JOUR A1 - Kellmann, Michael A1 - Günther, K.-D. T1 - Changes in stress and recovery in elite rowers during preparation for the Olympic Games Y1 - 2000 ER - TY - JOUR A1 - Timmer, Jens A1 - Schwarz, Udo A1 - Voss, Henning U. A1 - Wardinski, Ingo A1 - Belloni, Tomaso A1 - Hasinger, Günther A1 - VanDerKlis, Michael A1 - Kurths, Jürgen T1 - Linear and Nonlinear Time Series Analysis of the Black Hole Candidate Cygnus X-1 N2 - We analyze the variability in the x-ray lightcurves of the black hole candidate Cygnus X-1 by linear and nonlinear time series analysis methods. While a linear model describes the overall second order properties of the observed data well, surrogate data analysis reveals a significant deviation from linearity. We discuss the relation between shot noise models usually applied to analyze these data and linear stochastic autoregressive models. We debate statistical and interpretational issues of surrogate data testing for the present context. Finally, we suggest a combination of tools from linear and nonlinear time series analysis methods as a procedure to test the predictions of astrophysical models on observed data. Y1 - 2000 UR - http://pre.aps.org/ ER -