TY - JOUR A1 - Abel, Markus A1 - Celani, A. A1 - Ergni, V. A1 - Vulpiani, A. T1 - Front speed enhancement in cellular flows Y1 - 2002 SN - 1054-1500 ER - TY - JOUR A1 - Abraham, Charles A1 - Krahé, Barbara A1 - Dominic, Robert A1 - Fritsche, Immo T1 - Do health promotion messages target cognitive and behavioural correlates of condom use? : a content analysis of safer sex promotion leaflets in two countries Y1 - 2002 SN - 1359-107X ER - TY - BOOK A1 - Addison, John T. T1 - Principles of Market-Oriented Labor Market Policies T3 - Diskussionsbeitrag / Europäisches Institut für internationale Wirtschaftsbeziehungen, Potsdam Y1 - 2002 SN - 1430-5445 VL - 91 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Agata, Koichiro T1 - Internet, economic growth and globalization T3 - Diskussionsbeitrag / Europäisches Institut für internationale Wirtschaftsbeziehungen, Potsdam Y1 - 2002 SN - 1430-5445 VL - 101 PB - Univ. CY - Potsdam ER - TY - JOUR A1 - Ahlers, Volker A1 - Pikovskij, Arkadij T1 - Critical Properties of the Synchronization Transition in Space-Time Chaos N2 - We study two coupled spatially extended dynamical systems which exhibit space-time chaos. The transition to the synchronized state is treated as a nonequilibrium phase transition, where the average synchronization error is the order parameter. The transition in one-dimensional systems is found to be generically in the universality class of the Kardar- Parisi-Zhang equation with a growth-limiting term ("bounded KPZ"). For systems with very strong nonlinearities in the local dynamics, however, the transition is found to be in the universality class of directed percolation. Y1 - 2002 ER - TY - BOOK A1 - Albeverio, Sergio A1 - Demuth, Michael A1 - Schrohe, Elmar A1 - Schulze, Bert-Wolfgang T1 - Parabolicity, volterra calculus, and conical singularities : a volume of advances in partial differential equations T3 - Operator theory : advances and applications Y1 - 2002 SN - 3-7643-6906-x VL - 138 PB - Birkhäuser Verl. CY - Basel ER - TY - JOUR A1 - Albus, Alexander P. A1 - Gardiner, Simon A. A1 - Illuminati, Fabrizio A1 - Wilkens, Martin T1 - Quantum field theory of dilute homogeneous Bose-Fermi-mixtures at zero temperature : general formalismand beyond mean-field corrections N2 - We consider a dilute homogeneous mixture of bosons and spin-polarized fermions at zero temperature. We first construct the formal scheme for carrying out systematic perturbation theory in terms of single particle Green's functions. We introduce a new relevant object, the renormalized boson-fermion T-matrix which we determine to second order in the boson-fermion s-wave scattering length. We also discuss how to incorporate the usual boson-boson T-matrix in mean-field approximation to obtain the total ground state properties of the system. The next order term beyond mean- field stems from the boson-fermion interaction and is proportional to $a_{scriptsize BF}k_{scriptsize F}$. The total ground-state energy-density reads $E/V =epsilon_{scriptsize F} + epsilon_{scriptsize B} + (2pihbar^{2}a_{ m BF}n_{scriptsize B}n_{scriptsize F}/m) [1 + a_{scriptsize BF}k_{scriptsize F}f(delta)/pi]$. The first term is the kinetic energy of the free fermions, the second term is the boson-boson mean-field interaction, the pre-factor to the additional term is the usual mean-field contribution to the boson-fermion interaction energy, and the second term in the square brackets is the second-order correction, where $f(delta)$ is a known function of $delta= (m_{scriptsize B} - m_{scriptsize F})/(m_{scriptsize B} + m_{scriptsize F})$. We discuss the relevance of this new term, how it can be incorporated into existing theories of boson-fermion mixtures, and its importance in various parameter regimes, in particular considering mixtures of $^{6}$Li and $^{7}$Li and of $^{3}$He and $^{4}$He. Y1 - 2002 UR - http://xxx.lanl.gov/abs/cond-mat/0201102 ER - TY - JOUR A1 - Albus, Alexander P. A1 - Giorgini, S. A1 - Illuminati, Fabrizio A1 - Viverit, L. T1 - Critical temperature of Bose-Einstein condensation in trapped atomic Bose-Fermi mixtures N2 - We calculate the shift in the critical temperature of Bose-Einstein condensation for a dilute Bose-Fermi mixture confined by a harmonic potential, to lowest order in both the Bose-Bose and Bose-Fermi coupling constans. The relativ importance of the effect on the critical temperature of the boson-fermion interactions is investigated as a function of the parameters of mixture. The possible relevance of the shift of the transition temperature in current experiments on trapped Bose-Fermi mixtures is discussed. Y1 - 2002 ER - TY - JOUR A1 - Alcalde, D. A1 - Mediavilla, E. A1 - Moreau, O. A1 - De Rop, Y. A1 - Barrena, R. A1 - Gil-Merino, Rodrigo A1 - McLeod, B. A. A1 - Motta, V. A1 - Oscoz, Alejandro A1 - Serra-Ricart, M. T1 - QSO 2237+0305 VR light curves from Gravitational Lenses International Time Project optical monitoring N2 - We present VR observations of QSO 2237+0305 conducted by the Gravitational Lensing International Time Project collaboration from 1999 October 1 to 2000 February 3. The observations were made with the 2.56 m Nordic Optical Telescope at Roque de los Muchachos Observatory, La Palma (Spain). The point-spread function (PSF) fitting method and an adapted version of the ISIS subtraction method have been used to derive the VR light curves of the four components (A-D) of the quasar. The mean errors range in the intervals 0.01-0.04 mag (PSF fitting) and 0.01-0.02 mag (ISIS subtraction), with the faintest component (D) having the largest uncertainties. We address the relatively good agreement between the A and D light curves derived using different filters, photometric techniques, and telescopes. The new VR light curves of component A extend the time coverage of a high-magnification microlensing peak, which was discovered by the OGLE team. Y1 - 2002 ER - TY - THES A1 - Aleff, Hans-Jörg T1 - Die Dimension Zeit im Dienstleistungsmarketing Y1 - 2002 SN - 3-8244-7651-7 U6 - https://doi.org/10.1007/978-3-322-91448-4 PB - Deutscher Universitätsverlag CY - Wiesbaden ER -