TY - THES A1 - Szecówka, Marek T1 - Metabolic fluxes in photosynthetic and heterotrophic plant tissues Y1 - 2011 CY - Potsdam ER - TY - JOUR A1 - Sun, Zhuanlan A1 - Zhang, Xiaoqing A1 - Xia, Zhongfu A1 - Qiu, Xunlin A1 - Wirges, Werner A1 - Gerhard, Reimund A1 - Zeng, Changchun A1 - Zhang, Chuck A1 - Wang, Ben T1 - Polarization and piezoelectricity in polymer films with artificial void structure JF - Applied physics : A, Materials science & processing N2 - Laminated polymer-film systems with well-defined void structures were prepared from fluoroethylenepropylene (FEP) and polytetrafluoroethylene (PTFE) layers. First the PTFE films were patterned and then fusion-bonded with the FEP films. The laminates were subjected to either corona or contact charging in order to obtain the desired piezoelectricity. The build-up of the "macro-dipoles" in the laminated films was studied by recording the electric hysteresis loops. The resulting electro-mechanical properties were investigated by means of dielectric resonance spectroscopy (DRS) and direct measurements of the stress-strain relationship. Moreover, the thermal stability of the piezoelectric d (33) coefficient was investigated at elevated temperatures and via thermally stimulated discharge (TSD) current measurements in short circuit. For 150 mu m thick laminated films, consisting of one 25 mu m thick PTFE layer, two 12.5 mu m thick FEP layers, and a void of 100 mu m height, the critical voltage necessary for the build-up of the "macro-dipoles" in the inner voids was approximately 1400 V, which agrees with the value calculated from the Paschen Law. A quasi-static piezoelectric d (33) coefficient up to 300 pC/N was observed after corona charging. The mechanical properties of the film systems are highly anisotropic. At room temperature, the Young's moduli of the laminated film system are around 0.37 MPa in the thickness direction and 274 MPa in the lateral direction, respectively. Using these values, the theoretical shape anisotropy ratio of the void was calculated, which agrees well with experimental observation. Compared with films that do not exhibit structural regularity, the laminates showed improved thermal stability of the d (33) coefficients. The thermal stability of d (33) can be further improved by pre-aging. E.g., the reduction of the d (33) value in the sample pre-aged at 150A degrees C for 5 h was less than 5% after annealing for 30 h at a temperature of 90A degrees C. Y1 - 2011 U6 - https://doi.org/10.1007/s00339-011-6481-2 SN - 0947-8396 VL - 105 IS - 1 SP - 197 EP - 205 PB - Springer CY - New York ER - TY - JOUR A1 - Sun, Zhongkui A1 - Yang, Xiaoli T1 - Generating and enhancing lag synchronization of chaotic systems by white noise JF - Chaos : an interdisciplinary journal of nonlinear science N2 - In this paper, we study the crucial impact of white noise on lag synchronous regime in a pair of time-delay unidirectionally coupled systems. Our result demonstrates that merely via white-noise-based coupling lag synchronization could be achieved between the coupled systems (chaotic or not). And it is also demonstrated that a conventional lag synchronous regime can be enhanced by white noise. Sufficient conditions are further proved mathematically for noise-inducing and noise-enhancing lag synchronization, respectively. Additionally, the influence of parameter mismatch on the proposed lag synchronous regime is studied, by which we announce the robustness and validity of the new strategy. Two numerical examples are provided to illustrate the validity and some possible applications of the theoretical result. Y1 - 2011 U6 - https://doi.org/10.1063/1.3623440 SN - 1054-1500 SN - 1089-7682 VL - 21 IS - 3 PB - American Institute of Physics CY - Melville ER - TY - JOUR A1 - Sun, Y. -P. A1 - Hennies, Franz A1 - Pietzsch, Annette A1 - Kennedy, B. A1 - Schmitt, Thorsten A1 - Strocov, Vladimir N. A1 - Andersson, Joakim A1 - Berglund, Martin A1 - Rubensson, Jan-Erik A1 - Aidas, K. A1 - Gel'mukhanov, F. A1 - Odelius, Michael A1 - Föhlisch, Alexander T1 - Intramolecular soft modes and intermolecular interactions in liquid acetone JF - Physical review : B, Condensed matter and materials physics N2 - Resonant inelastic x-ray scattering spectra excited at the O1s(-1)pi* resonance of liquid acetone are presented. Scattering to the electronic ground state shows a resolved vibrational progression where the dominant contribution is due to the C-O stretching mode, thus demonstrating a unique sensitivity of the method to the local potential energy surface in complex molecular systems. For scattering to electronically excited states, soft vibrational modes and, to a smaller extent, intermolecular interactions give a broadening, which blurs the vibrational fine structure. It is predicted that environmental broadening is dominant in aqueous acetone. Y1 - 2011 U6 - https://doi.org/10.1103/PhysRevB.84.132202 SN - 1098-0121 VL - 84 IS - 13 PB - American Physical Society CY - College Park ER - TY - JOUR A1 - Sun, Y-P A1 - Pietzsch, Annette A1 - Hennies, Franz A1 - Rinkevicius, Z. A1 - Karlsson, Hans O. A1 - Schmitt, Thorsten A1 - Strocov, Vladimir N. A1 - Andersson, Joakim A1 - Kennedy, B. A1 - Schlappa, J. A1 - Föhlisch, Alexander A1 - Gel'mukhanov, F. A1 - Rubensson, Jan-Erik T1 - Internal symmetry and selection rules in resonant inelastic soft x-ray scattering JF - Journal of physics : B, Atomic, molecular and optical physics N2 - Resonant inelastic soft x-ray scattering spectra excited at the dissociative 1 sigma(g) -> 3 sigma(u) resonance in gas-phase O(2) are presented and discussed in terms of state-of-the-art molecular theory. A new selection rule due to internal spin coupling is established, facilitating a deep analysis of the valence excited final states. Furthermore, it is found that a commonly accepted symmetry selection rule due to orbital parity breaks down, as the core hole and excited electron swap parity, thereby opening the symmetry forbidden 3 sigma(g) decay channel. Y1 - 2011 U6 - https://doi.org/10.1088/0953-4075/44/16/161002 SN - 0953-4075 VL - 44 IS - 16 PB - IOP Publ. Ltd. CY - Bristol ER - TY - THES A1 - Sun, Xiaoliang T1 - Towards understanding the dynamics of biological systems from -Omics data Y1 - 2011 CY - Potsdam ER - TY - JOUR A1 - Sucharipa, Ernst T1 - Die Gemeinsame Außen- und Sicherheitspolitik (GASP) der Europäischen Union im Rahmen der Vereinten Nationen BT - Bestandsaufnahme, Defizite, Chancen JF - Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000–2008 N2 - Inhalt: - I. Die Relevanz der Vereinten Nationen für eine Gemeinsame Außen- und Sicherheitspolitik der Europäischen Union - II. Rechtliche und „pararechtliche“ Grundlagen der EU-Zusammenarbeit - III. Praktische Gestaltung der EU-Zusammenarbeit bei den Vereinten Nationen. - 1. Generalversammlung - 2. Sicherheitsrat - IV. Die Vereinten Nationen als Thema der Brüsseler Institutionen - V. Zur Vertretung der EU im Sicherheitsrat (einige abschließende Anmerkungen) Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-61207 SP - 351 EP - 369 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Sturzbecher, Dietmar A1 - Burkert, Mathias A1 - Hoffmann, Lars T1 - Zwischen Akzeptanz und Absage BT - das Verhältnis brandenburgischer Jugendlicher zu Gewalt und Rechtsextremismus JF - Die Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-52193 SN - 978-3-86956-038-0 SP - 83 EP - 107 ER - TY - JOUR A1 - Struck, Torsten H. A1 - Paul, Christiane A1 - Hill, Natascha A1 - Hartmann, Stefanie A1 - Hoesel, Christoph A1 - Kube, Michael A1 - Lieb, Bernhard A1 - Meyer, Achim A1 - Tiedemann, Ralph A1 - Purschke, Guenter A1 - Bleidorn, Christoph T1 - Phylogenomic analyses unravel annelid evolution JF - Nature : the international weekly journal of science N2 - Annelida, the ringed worms, is a highly diverse animal phylum that includes more than 15,000 described species and constitutes the dominant benthic macrofauna from the intertidal zone down to the deep sea. A robust annelid phylogeny would shape our understanding of animal body-plan evolution and shed light on the bilaterian ground pattern. Traditionally, Annelida has been split into two major groups: Clitellata (earthworms and leeches) and polychaetes (bristle worms), but recent evidence suggests that other taxa that were once considered to be separate phyla (Sipuncula, Echiura and Siboglinidae (also known as Pogonophora)) should be included in Annelida(1-4). However, the deep-level evolutionary relationships of Annelida are still poorly understood, and a robust reconstruction of annelid evolutionary history is needed. Here we show that phylogenomic analyses of 34 annelid taxa, using 47,953 amino acid positions, recovered a well-supported phylogeny with strong support for major splits. Our results recover chaetopterids, myzostomids and sipunculids in the basal part of the tree, although the position of Myzostomida remains uncertain owing to its long branch. The remaining taxa are split into two clades: Errantia (which includes the model annelid Platynereis), and Sedentaria (which includes Clitellata). Ancestral character trait reconstructions indicate that these clades show adaptation to either an errant or a sedentary lifestyle, with alteration of accompanying morphological traits such as peristaltic movement, parapodia and sensory perception. Finally, life history characters in Annelida seem to be phylogenetically informative. Y1 - 2011 U6 - https://doi.org/10.1038/nature09864 SN - 0028-0836 VL - 471 IS - 7336 SP - 95 EP - U113 PB - Nature Publ. Group CY - London ER - TY - JOUR A1 - Streich, Rita A1 - Becken, Michael A1 - Ritter, Oliver T1 - 2.5D controlled-source EM modeling with general 3D source geometries JF - Geophysics N2 - Most 2.5D controlled-source electromagnetic (CSEM) modeling algorithms presented to date explicitly consider only sources that are point dipoles oriented parallel or perpendicular to the direction of constant conductivity. This makes simulations of complex source geometries expensive, requiring separate evaluations of many point dipole fields, and thus limits the practical applicability of such schemes for simulating and interpreting field data. We present a novel 2.5D CSEM modeling scheme that overcomes this limitation and permits efficient simulations of sources with general shape and orientation by evaluating fields for the entire source at once. We accommodate general sources by using a secondary field approach, in which primary fields are computed for the general source and a 1D background conductivity model. To carry out the required Fourier transforms between space and wavenumber domain using the same fast cosine and sine transform filters as in conventional algorithms, we split the primary and secondary fields into their symmetric and antisymmetric parts. For complex 3D source geometries, this approach is significantly more efficient than previous 2.5D algorithms. Our finite-difference algorithm also includes novel approaches for divergence correction at low frequencies and EM field interpolation across conductivity discontinuities. We describe the modeling scheme and demonstrate its accuracy and efficiency by comparisons of 2.5D-simulated data with 1D and 3D results. Y1 - 2011 U6 - https://doi.org/10.1190/GEO2011-0111.1 SN - 0016-8033 VL - 76 IS - 6 SP - F387 EP - F393 PB - Society of Exploration Geophysicists CY - Tulsa ER -