Bielefeld University

About: Bielefeld University is a education organization based out in Bielefeld, Nordrhein-Westfalen, Germany. It is known for research contribution in the topics: Population & Quantum chromodynamics. The organization has 10123 authors who have published 26576 publications receiving 728250 citations. The organization is also known as: University of Bielefeld & UNIVERSITAET BIELEFELD.

Linking Goal Progress and Subjective Well-Being: A Meta-analysis

Abstract: This article provides a quantitative review of the link between successful goal pursuit and subjective well-being (SWB). The meta-analysis integrates the findings of 108 independent samples derived from 85 studies. Results revealed a significant association between successful goal striving and SWB (ρ = .43). Moderator analyses showed that the association was larger when (a) successful goal pursuit was defined as goal progress, instead of goal attainment, when (b) SWB was measured as SWB (positive indicators), instead of ill-being (negative indicators), when (c) the SWB measure matched the goal content, instead of lacked conceptual correspondence, and when (d) the data collection took place in an individualistic culture, instead of a collectivistic culture. Discussion centers on the interpretation of moderators, theoretical implications, and directions for future research.

Chapter 25 Agent-based Models of Innovation and Technological Change

Abstract: This chapter discusses the potential of the agent-based computational economics approach for the analysis of processes of innovation and technological change. It is argued that, on the one hand, several genuine properties of innovation processes make the possibilities offered by agent-based modelling particularly appealing in this field, and that, on the other hand, agent-based models have been quite successful in explaining sets of empirical stylized facts, which are not well accounted for by existing representative-agent equilibrium models. An extensive survey of agent-based computational research dealing with issues of innovation and technological change is given and the contribution of these studies is discussed. Furthermore a few pointers towards potential directions of future research are given.

Classical and Quantum Magnetism in Giant Keplerate Magnetic Molecules

Abstract: Complementary theoretical modeling methods are presented for the classical and quantum Heisenberg model to explain the magnetic properties of nanometer-sized magnetic molecules. Excellent quantitative agreement is achieved between our experimental data down to 0.1 K and for fields up to 60 Tesla and our theoretical results for the giant Keplerate species {Mo72Fe30}, by far the largest paramagnetic molecule synthesized to date.

Hard-loop dynamics of non-Abelian plasma instabilities.

Abstract: Non-Abelian plasma instabilities may be responsible for the fast apparent quark-gluon thermalization in relativistic heavy-ion collisions if their exponential growth is not hindered by nonlinearities. We study numerically the real-time evolution of instabilities in an anisotropic non-Abelian plasma with an SU(2) gauge group in the hard-loop approximation. We find exponential growth of non-Abelian plasma instabilities both in the linear and in the strongly nonlinear regimes, with only a brief phase of subexponential behavior in between.