TY - JOUR A1 - Kössl, Manfred A1 - Vater, Marianne T1 - Consequences of outer hair cell damage for otoacoustic emissions and audiovocal feedback in the mustached bat Y1 - 2000 SN - 1525-3961 ER - TY - JOUR A1 - Pietsch, Ullrich A1 - Rochon, Paul A1 - Natansohn, Almeria T1 - Formation of a buried lateral density grating in azopenzene polymer films Y1 - 2000 ER - TY - JOUR A1 - Wessel, Niels A1 - Ziehmann, Christine A1 - Kurths, Jürgen A1 - Meyerfeldt, Udo A1 - Schirdewan, Alexander A1 - Voss, Andreas T1 - Short-term forecasting of life-threatening cardiac arrhythmias based on symbolic dynamics and finite-time growth rates N2 - Ventricular tachycardia or fibrillation (VT-VF) as fatal cardiac arrhythmias are the main factors triggering sudden cardiac death. The objective of this study is to find early signs of sustained VT-VF in patients with an implanted cardioverter-defibrillator (ICD). These devices are able to safeguard patients by returning their hearts to a normal rhythm via strong defibrillatory shocks; additionally, they store the 1000 beat-to-beat intervals immediately before the onset of a life-threatening arrhythmia. We study these 1000 beat-to-beat intervals of 17 chronic heart failure ICD patients before the onset of a life-threatening arrhythmia and at a control time, i.e., without a VT-VF event. To characterize these rather short data sets, we calculate heart rate variability parameters from the time and frequency domain, from symbolic dynamics as well as the finite-time growth rates. We find that neither the time nor the frequency domain parameters show significant differences between the VT-VF and the control time series. However, two parameters from symbolic dynamics as well as the finite-time growth rates discriminate significantly both groups. These findings could be of importance in algorithms for next generation ICD's to improve the diagnostics and therapy of VT-VF. Y1 - 2000 ER - TY - JOUR A1 - Kuznetsov, Sergey P. A1 - Neumann, Eireen A1 - Pikovskij, Arkadij A1 - Sataev, I. G. T1 - Critical point of tori collision in quasiperiodically forced systems N2 - We report on a type of scaling behavior in quasiperiodically forced systems. On the parameter plane the critical point appears as a terminal point of the tori-collision bifurcation curve; its location is found numerically with high precision for two basic models, the forced supercritical circle map and the forced quadratic map. The hypothesis of universality, based on renormalization group arguments, is advanced to explain the observed scaling properties for the critical attractor and for the parameter plane arrangement in the neighborhood of the criticality. Y1 - 2000 ER - TY - JOUR A1 - Becker, Thorsten A1 - Getzin, Stephan T1 - The fairy circles of Kaokoland (North-West-Namibia) : origin, distribution, and characteristics Y1 - 2000 ER - TY - JOUR A1 - Katzorke, Ines A1 - Pikovskij, Arkadij T1 - Chaos and complexity in a simple model of production dynamics Y1 - 2000 SN - 1026-0226 ER - TY - JOUR A1 - Pietsch, Ullrich A1 - Darowski, Nora A1 - Ulyanenkov, A. A1 - Grenzer, Jörg A1 - Wang, K. H. A1 - Forchel, Alfred T1 - Analysis of the strain distribution in lateral nanostructures for interpreting photoluminescence data Y1 - 2000 ER - TY - JOUR A1 - Zimmermann, Bernhard T1 - Subcellular organization of agonist-evoked Ca2+ waves in the blowfly salivary gland Y1 - 2000 ER - TY - JOUR A1 - Zimmermann, Bernhard T1 - Control of insP(3)-induced Ca2+ oscillations in permeabilized blowfly salivary gland cells : contribution of mitochondria Y1 - 2000 SN - 0022-3751 ER - TY - JOUR A1 - Walz, Bernd A1 - Ukhanov, Kyrill T1 - Light-dependent repetitive Ca2+ spikes induced by extracellular application of neumycin in honeybee drone photoreceptors Y1 - 2000 SN - 0340-7594 ER - TY - JOUR A1 - Walz, Bernd A1 - Ukhanov, Kyrill A1 - Zimmermann, Bernhard T1 - Actions of neomycin on electrical light responses : Ca2+ release and intracellular Ca2+ changes in photoreceptors of the honeybee drone Y1 - 2000 SN - 0340-7594 ER - TY - JOUR A1 - Ukhanov, Kyrill A1 - Walz, Bernd T1 - The phosphoinositide signaling cascade is involved in photoreception in the leech Hirudo medicinalis Y1 - 2000 SN - 0340-7554 ER - TY - JOUR A1 - Zillmer, Rüdiger A1 - Ahlers, Volker A1 - Pikovskij, Arkadij T1 - Scaling of Lyapunov exponents of coupled chaotic systems N2 - We develop a statistical theory of the coupling sensitivity of chaos. The effect was first described by Daido [Prog. Theor. Phys. 72, 853 (1984)]; it appears as a logarithmic singularity in the Lyapunov exponent in coupled chaotic systems at very small couplings. Using a continuous-time stochastic model for the coupled systems we derive a scaling relation for the largest Lyapunov exponent. The singularity is shown to depend on the coupling and the systems' mismatch. Generalizations to the cases of asymmetrical coupling and three interacting oscillators are considered, too. The analytical results are confirmed by numerical simulations. Y1 - 2000 ER - TY - JOUR A1 - Kuhlbrodt, Till A1 - Névir, Peter T1 - Low-order point vortex models of atmospheric blocking N2 - Conceptual models of blocking structures are constructed by reducing the twodimensional atmospheric vorticity field to a few point vortices. The flow is assumed to be barotropic and divergence-free, and a blocking event is represented by a point vortex dipole. The focus is here on the motion of the blocking dipole under the influence of the zonal mean flow. This is modelled in three different ways: A dipole embedded in a latitude-dependent zonal mean flow exhibits neutrally stable oscillations; their period is estimated analytically. A cyclonic point vortex approaching from upstream can either pass the dipole or break it up, so that an $Omega$-shaped pattern of three vortices emerges. The stationarity of a blocking between two troughs is modelled by four point vortices. These low-order point vortex models are compared with the dynamics of real blockings in case studies. Despite their high degree of simplification, those models reproduce the kinematics of blocking events properly. This results from the discretization of the flow to its actual physical states, the vortices, in contrast to the common, purely mathematical discretization to grid points. Thus, point vortex dynamics are proposed to be a powerful completion of continuous fluid dynamics in explaining blocking events. Y1 - 2000 ER - TY - JOUR A1 - Rawel, Harshadrai Manilal A1 - Rohn, Sascha A1 - Kroll, Jürgen T1 - Reactions of selected secondary plant metabolites (glucosinolates and phenols) with food proteins and enzymes - Influence on physicochemical properties, enzyme activity and proteolytic dagradation Y1 - 2000 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Mruczek, Krysztyna T1 - P-compatible Hypersubstitutions Y1 - 2000 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Mahdavi, Kazem T1 - The order of normal form hypersubstitutions of type 2 Y1 - 2000 ER - TY - JOUR A1 - Henkel, Carsten A1 - Joulain, Karl A1 - Carminati, Rémi A1 - Greffet, Jean-Jacques T1 - Spatial coherence of thermal near fields N2 - We analyze the spatial coherence of the electromagnetic field emitted by a half-space at temperature T close to the interface. An asymptotic analysis allows to identify three different contributions to the cross-spectral density tensor in the near-field regime. It is shown that the coherence length can be either much larger or much shorter than the wavelength depending on the dominant contribution. Y1 - 2000 ER - TY - BOOK A1 - Liebers, Klaus ED - Mikelskis, Helmut ED - Wilke, Hans-Joachim T1 - Physik plus : Kl. 7, Arbeitsh., Gymnasium Thüringen Y1 - 2000 SN - 3-06-020771-2 PB - Cornelsen CY - Berlin ER - TY - JOUR A1 - Mann, Ingrid A1 - Krivov, Alexander V. A1 - Kimura, Hiroshi T1 - Dust cloud near the sun Y1 - 2000 ER - TY - JOUR A1 - Pikovskij, Arkadij A1 - Rosenblum, Michael A1 - Kurths, Jürgen T1 - Phase synchronization in regular and chaotic systems Y1 - 2000 SN - 0218-1274 ER - TY - JOUR A1 - Linke, Thomas A1 - Schaub, Torsten T1 - Alternative foundations for Reiter's default logic. Y1 - 2000 SN - 0004-3702 ER - TY - JOUR A1 - Glendinning, P. A. A1 - Feudel, Ulrike A1 - Pikovskij, Arkadij A1 - Stark, J. T1 - The structure of mode-locking regions in quasi-periodically forced circle maps Y1 - 2000 ER - TY - JOUR A1 - Junek, Heinz A1 - Braunß, Hans-Andreas A1 - Plewnia, Eckart T1 - Approximation numbers for polynomials N2 - Approximation numbers of linear operators are a very useful tool in order to understand the structure and the numerical behaviour of the operators. In this paper, this concept is extended to polynomials on Banach spaces and the approximation numbers of diagonal polynomials are estimated. As a main tool the rank of polynomials as a graduation of finite type polynomials is introduced and studied. Y1 - 2000 ER - TY - JOUR A1 - Kosta, Peter T1 - Zur lateinischen Dichtung des Johannes Bocatius (1569-1621) N2 - Der Beitrag gibt eine philologische Analyse des Oeuvre eines der bedeutendesten sorbischen/wendischen Vertreters des Humanismus und der Renaissance in der Niederlausitz Johannes Bocatius (1569-1621). Neben einer Übersicht des Gesamtwerks werden die Quellen und Einflüsse von Francesco Petrarca und Giovanni Boccaccio auf Bocatius erörtert. Der Artikel eignet sich für Slavisten (Sorabisten), Romanisten und Allgemeine und Vergleichende Literaturwissenschaftler. Y1 - 2000 ER - TY - BOOK ED - Mikelskis, Helmut ED - Wilke, Hans-Joachim T1 - Physik plus : Kl. 7/8, Lehrerbd., mit Kopiervorlagen und Lösungen zu den Arbeitsheften, Sek. 1 Mecklenburg- Vorpommern Y1 - 2000 SN - 3-06-022262-2 PB - Volk-und-Wissen-Verl. CY - Berlin ER - TY - JOUR A1 - Krivova, Natalia A. A1 - Krivov, Alexander V. A1 - Mann, Ingrid T1 - Size distribution of dust in the disk of Beta Pictoris Y1 - 2000 SN - 1-58381-051-X ER - TY - JOUR A1 - Chen, Jian A1 - Wollenberger, Ursula A1 - Lisdat, Fred A1 - Ge, Bixia A1 - Scheller, Frieder W. T1 - Superoxide sensor based on hemin modified electrode Y1 - 2000 ER - TY - JOUR A1 - Vater, Marianne T1 - Evolutionary plasticity and ontogeny of the bat cochlea. Y1 - 2000 SN - 0-521-62632-3 ER - TY - JOUR A1 - Thiessenhusen, Kai-Uwe A1 - Krueger, Harald A1 - Spahn, Frank A1 - Grün, Eberhard T1 - Large dust grains around Jupiter : the observations of the Galileo dust detector Y1 - 2000 ER - TY - JOUR A1 - Zaikin, Alexei A. A1 - Kurths, Jürgen T1 - Additive noise and noise-induced nonequilibrium phase transitions Y1 - 2000 SN - 1-563-96826-6 ER - TY - JOUR A1 - Becker, Thomas W. A1 - Peter, Martin G. A1 - Pool-Zobel, Beatrice L. T1 - Cellular effects of lignans : modulation of growth, oxidative DNA damage and cell metabolism in human colon cancer cells Y1 - 2000 ER - TY - JOUR A1 - Stahn, Jochen A1 - Geue, Thomas A1 - Grenzer, Jörg A1 - Pietsch, Ullrich T1 - Interaction of short-chain alkanes with surface and interfaces of multilayer films built from amphiphilic molecules: an in-situ X-ray and neutron scattering probe Y1 - 2000 ER - TY - BOOK A1 - Jessel, Beate T1 - Erfolgskontrolle in der Eingriffsregelung Y1 - 2000 UR - http://www.brandenburg.de/land/mlur/n/er_2000.pdf CY - Potsdam ER - TY - BOOK A1 - Jessel, Beate T1 - Erfolgskontrolle in der Eingriffsregelung : Handlungsanleitung zur Sicherung des Maßnahmenerfolgs Y1 - 2000 UR - http://www.brandenburg.de/land/mlur/n/hand_anl.pdf CY - Potsdam ER - TY - JOUR A1 - Felbinger, Timo A1 - Santos, L. A1 - Wilkens, Martin A1 - Lewenstein, Maciej T1 - Time Correlations of a laser-induced Bose-Einstein condensate N2 - We analyze the multi-time correlations of a laser-induced Bose Einstein condensate. We use quantum stochastic methods to obtain under certain circumstances a Fokker-Planck equation which describes the phase-difussion process, and obtain an analytical expression of the two-time correlations. We perform also quantum Monte Carlo numerical simulations of the correlations, which are in good agreement with the predicted analytical results. Y1 - 2000 ER - TY - JOUR A1 - Eisert, Jens A1 - Wilkens, Martin T1 - Catlysis of Entanglement Manipulation for Mixed States N2 - We consider entanglement-assisted remote quantum state manipulation of bipartite mixed states. Several aspects are addressed: we present a class of mixed states of rank two that can be transformed into another class of mixed states under entanglement-assisted local operations with classical communication, but for which such a transformation is impossible without assistance. Furthermore, we demonstrate enhancement of the efficiency of purification protocols with the help of entanglement-assisted operations. Finally, transformations from one mixed state to mixed target states which are sufficiently close to the source state are contrasted with similar transformations in the pure-state case. Y1 - 2000 ER - TY - JOUR A1 - Wilkens, Martin A1 - Illuminati, Fabrizio A1 - Krämer, Meret T1 - Transition temperature of the weakly interacting Bose gas: perturbative solution of the crossover equations in the canonical ensemble N2 - We compute the shift of the critical temperature Tc with respect to the ideal case for a weakly interacting uniform Bose gas. We work in the framework of the canonical ensemble, extending the criterion of condensation provided by the canonical particle counting statistics for the zero-momentum state of the uniform ideal gas. The perturbative solution of the crossover equation to lowest order in power of the scattering length yields (Tc - Tc0)/Tc0=-0,93ap 1/3, where Tc0 is the transition temperature of the corresponding ideal Bose gas , a is the scattering length, and p is the particle number density. This is at vaiance with the standard grand canonical prediction of a null shift of the critical temperature in the lowest perturbative order. The non-equevalence of statistical ensemble for the ideal Bose gas is thus confirm (at the lowestperturbative level) also in the presence of interactions. Y1 - 2000 ER - TY - JOUR A1 - Linker, Torsten T1 - Radicals and Radical Reactions Y1 - 2000 ER - TY - JOUR A1 - Linker, Torsten A1 - Linker, Ursula T1 - Simple synthesis of tetra-acceptor-substituted alkenes by the formal dehydrodimerization of malonates Y1 - 2000 ER - TY - JOUR A1 - Linker, Torsten A1 - Linker, Ursula T1 - Einfache Synthese vierfach Acceptor-substituierter Alkene durch formale Dehydrodimerisierung von Malonsäureestern Y1 - 2000 ER - TY - BOOK A1 - Engel, Uwe A1 - Krekeler, Gaby T1 - Der Studieneinstieg an der Universität Potsdam im Urteil der Studierenden : Bewertungen der Studieneingangsphase im Wintersemester 1997/98 T3 - Ergebnisberichte zur Evaluation Y1 - 2000 SN - 1439-9075 VL - 1 PB - Univ.-Bibl., Publ.-Stelle CY - Potsdam ER - TY - BOOK A1 - Engel, Uwe A1 - Krekeler, Gaby T1 - Der Studieneinstieg an der Universität Potsdam im Urteil der Studierenden : Bewertungen der Studieneingangsphase im Wintersemester 1998/99 T3 - Ergebnisberichte zur Evaluation Y1 - 2000 SN - 1439-9075 VL - 2 PB - Univ.-Bibl., Publ.-Stelle CY - Potsdam ER - TY - BOOK A1 - Engel, Uwe A1 - Krekeler, Gaby T1 - Der Wechsel vom Grundstudium ins Hauptstudium : studentische Einschätzungen zu Beginn des Hauptstudiums an der Universität Potsdam im Wintersemester 1998/99 T3 - Ergebnisberichte zur Evaluation Y1 - 2000 SN - 1439-9075 VL - 3 PB - Univ.-Bibl., Publ.-Stelle CY - Potsdam ER - TY - THES A1 - Bauer, Klaus T1 - Charakterisierung eines vulkanisch geprägten passiven Kontinentalrandes mit seismischen Verfahren am Beispiel Namibias Y1 - 2000 UR - http://www.gfz-potsdam.de/bib/pub/str0102/0102.pdf UR - https://nbn-resolving.org/urn:nbn:de:kobv:b103-010123 ER - TY - BOOK ED - Kleger, Heinz T1 - Region - Nation - Europa Y1 - 2000 PB - LIT CY - Münster ER - TY - JOUR A1 - Linker, Torsten A1 - Engelhardt, Ulrike A1 - Sarkar, Arunkanti T1 - Kinetic resolution by Jacobsen epoxidation as an easy route to podophyllotoxin analoga Y1 - 2000 ER - TY - JOUR A1 - Mikelskis, Helmut T1 - Untersuchung über multimediales Lernen von Physik : eine Pilotstudie mit Germanistik- und Physikstudenten Y1 - 2000 SN - 3-89325-847-7 ER - TY - BOOK A1 - Engel, Uwe A1 - Krekeler, Gaby T1 - Studierende in der Studienabschlußphase an der Universität Potsdam : Rückblicke auf das Studium und Perspektiven zum Berufseinstieg ; studentische Einschätzungen aus dem Wintersemester 1998/99 T3 - Ergebnisberichte zur Evaluation Y1 - 2000 SN - 1439-9075 VL - 4 PB - Univ.-Bibl., Publ.-Stelle CY - Potsdam ER - TY - JOUR A1 - Krahé, Barbara T1 - Aggression in den Beziehungen von Mädchen Y1 - 2000 ER -