TY - JOUR A1 - Jeltsch, Florian A1 - Moloney, Kirk A. T1 - Spatially-explicit vegetation models : what have we learned ? Y1 - 2001 ER - TY - JOUR A1 - Bergstedt, Christel A1 - Horn, Martin Erik A1 - Michelskis, Helmut A1 - Winter, Rolf T1 - Energie JF - Naturwissenschaften : Biologie, Chemie, Physik Y1 - 2001 SN - 3-06-020935-9 VL - 8 PB - Volk-und-Wissen-Verl. CY - Berlin ER - TY - JOUR A1 - Christlieb, N. A1 - Green, P. J. A1 - Wisotzki, Lutz A1 - Reimers, Dieter T1 - The stellar content of the Hamburg/ESO survey : II. a large, homogeneously-selected sample of high latitude carbon stars Y1 - 2001 ER - TY - JOUR A1 - Koetz, Joachim A1 - Kosmella, Sabine A1 - Beitz, Toralf T1 - Self-assembled Polyelectrolyte Systems Y1 - 2001 ER - TY - JOUR A1 - Wambsganß, Joachim T1 - Gravity's kaleidoscope : four consequences of gravitational light deflection Y1 - 2001 ER - TY - JOUR A1 - Wambsganß, Joachim T1 - Microlensing of Quasars N2 - Microlens-induced variability in multiple quasars can be used to study two cosmological issues of great interest, the size and brightness profile of quasars on one hand, and the distribution of compact (dark) matter along the line of sight on the other. Here a summary is given of recent theoretical progress as well as observational evidence for quasar microlensing, plus a discussion of desired observations and required theoretical studies. Y1 - 2001 ER - TY - JOUR A1 - Koopmans, L. V. E. A1 - Wambsganß, Joachim T1 - On the probability of microlensing in gamma-ray burst afterglows N2 - The declining light curve of the optical afterglow of gamma-ray burst (GRB) GRB000301C showed rapid variability with one particularly bright feature at about t-t0=3.8d. This event was interpreted as gravitational microlensing by Garnavich, Loeb & Stanek and subsequently used to derive constraints on the structure of the GRB optical afterglow. In this paper, we use these structural parameters to calculate the probability of such a microlensing event in a realistic scenario, where all compact objects in the universe are associated with observable galaxies. For GRB000301C at a redshift of z=2.04, the a posteriori probability for a microlensing event with an amplitude of m>=0.95mag (as observed) is 0.7 per cent (2.7 per cent) for the most plausible scenario of a flat -dominated Friedmann- Robertson-Walker (FRW) universe with m=0.3 and a fraction f*=0.2 (1.0) of dark matter in the form of compact objects. If we lower the magnification threshold to m>=0.10mag, the probabilities for microlensing events of GRB afterglows increase to 17 per cent (57 per cent). We emphasize that this low probability for a microlensing signature of almost 1mag does not exclude that the observed event in the afterglow light curve of GRB000301C was caused by microlensing, especially in light of the fact that a galaxy was found within 2arcsec from the GRB. In that case, however, a more robust upper limit on the a posteriori probability of ~5 per cent is found. It does show, however, that it will not be easy to create a large sample of strong GRB afterglow microlensing events for statistical studies of their physical conditions on microarcsec scales. Y1 - 2001 ER - TY - JOUR A1 - Wellstein, Stephan A1 - Langer, Norbert A1 - Braun, H. T1 - Formation of contact in massive close binaries Y1 - 2001 ER - TY - JOUR A1 - Peitsch, Helmut T1 - Zur Rezeption linker und marxistischer Literatur : anläßlich von Sven Hanuscheks "Heinar Kipphardts Bibliothek" Y1 - 2001 ER - TY - JOUR A1 - Klein, Eckart T1 - Möglichkeiten und Grenzen der Genfer Flüchtlingskonvention für die Arbeit im 21. Jahrhundert : Bedeutung der Genfer Konvention für die Zukunft Y1 - 2001 ER - TY - BOOK A1 - Klein, Eckart T1 - Selbstverteidigung Y1 - 2001 ER - TY - BOOK ED - Asche, Hartmut ED - Herrmann, Christian T1 - Web.Mapping 1 : raumbezogene Information und Kommunikation im Internet Y1 - 2001 SN - 3-87907-353-8 PB - Wichmann CY - Heidelberg ER - TY - BOOK A1 - Sabrow, Martin A1 - Baberowski, Joerg A1 - Conze, Eckart A1 - Gassert, Philipp T1 - Geschichte ist immer Gegenwart : vier Thesen zur Zeitgeschichte Y1 - 2001 SN - 3-421-05564-5 PB - DVA CY - Stuttgart ER - TY - JOUR A1 - Kruse, Hans-Peter T1 - Can satiety be measured? N2 - An energy-controlled study on a Western diet composed of 45% fat, 40% carbohydrate and 15% protein by energy was carried out. The study consisted of four test phases having a length of 9 days in each case, where 8 healthy free- living subjects were adjusted to individual energy requirements at maintenance level. Between the tests, wash-out phases of 4-5 months were inserted to avoid adaptation effects. By using a standard breakfast of constant composition, satiety was evaluated by applying the concept of categorical comparison, which was based on the common fact, that the perception between two meals is changed and usually a set of sensations can be discriminated. These were termed very full and full (just after finishing a meal), appetite and hungry (just before the next meal). These sensations were used as categories on a categorical scale. The evaluation of satiety was performed such that on each day of the four test phases the subjects had to select over a period of 4 h every 30 min one category out of the four, what corresponded to the individual sensation at that time. This procedure was followed by a mathematical treatment of data such that the individual judgements were transformed into a numerical system. As a result, the time course of satiety was available characterizing the time-dependent change of the interoception after consuming the test meal. Using this concept highly reliable results were obtained as demonstrated by the comparison of the four test series. Y1 - 2001 UR - http://www3.interscience.wiley.com/cgi-bin/abstract/85010689/ ER - TY - JOUR A1 - Brosch, Renate T1 - Nackte Akte : Repräsendation weiblicher Körper und der böse Blick des Begehrens Y1 - 2001 ER - TY - BOOK ED - Kleger, Heinz T1 - Gemeinsam einsam : die Region Berlin-Brandenburg T3 - Region - Nation - Europa Y1 - 2001 SN - 3-8258-5493-0 VL - 8 PB - LIT CY - Hamburg ER - TY - JOUR A1 - Abel, Markus A1 - Celani, A. A1 - Vergeni, D. A1 - Vulpiani, A. T1 - Front propagation in laminar flows N2 - The Problem of front propagation in flowing media is addressed for laminar velocity fields in two dimensions. Three representative cases are discussed: stationary cellular flow, stationary shear flow, and percolating flow. Production terms of Fisher-Kolmogorov-Petrovskii-Piskunov type and of Arrhenius type are considered under the assumption of no feedback of the concentration on the velocity. Numerical simulations of advection-reaction-diffusion equations have been performed by an algorithm based on discrete-time maps. The results show a generic enhancement of the speed of front propagation by the underlying flow. For small molecular diffusivity, the front speed Vf depends on the typical flow velocity U as a power law with an exponent depending on the topological properties of the flow, and on the ratio of reactive and advective time scales. For open-streamline flows we find always Vf~U, whereas for cellular flows we observe Vf~U1/4 for fast advection and Vf~U3/4 for slow advection. Y1 - 2001 UR - http://www.stat.physik.uni-potsdam.de/~markus/papers/PRE64-46307-1.pdf ER - TY - BOOK ED - Mikelskis, Helmut ED - Wilke, Hans-Joachim T1 - Physik : Kl. 7/8, Lehrerbd., Sekundarschule Sachsen-Anhalt Y1 - 2001 SN - 3-06-022271-1 PB - Volk-und-Wissen-Verl. CY - Berlin ER - TY - JOUR A1 - Rheinberg, Falko T1 - Motivationstraining Y1 - 2001 SN - 3- 8017-1347-4 ER - TY - JOUR A1 - Lund, Brigitte A1 - Rheinberg, Falko A1 - Gladasch, Ulrike T1 - Ein Elterntraining zum motivationsförderlichen Erziehungsverhalten in Leistungskontexten Y1 - 2001 ER -