From the reviews:
"Schweitzer's approach is gradual. The first four chapters are devoted to introducing more and more complexities and subtleties in the Brownian agent models, and the focus is on the models themselves rather than on the systemsa ] Reading and understanding these chapters may be a difficult time-consuming task, but the reward is high. Starting from chapter five (on tracks and trail formation in biological systems) and ending with chapter ten (on opinion formation), the reader can amuse him/herself in dealing with models of real systems and devote his/her attention to the more relevant issues for his/her research.
"This book contains some gems. My favorite one is in chapter nine: the discussion of a spatial dynamic model for the labor market introduced by the well-known US economist Paul Krugman where "workers are assumed to move toward locations that offer them higher real wages." Schweitzer shows not only that Krugman's model is nothing else that an instance of a selection equation of the Fisher-Eigen type, but also, using the formalism developed previously, he can easily generalize it and question the economic meaning of the assumptions leading to Krugman's equations.
"I can recommend this book to all those working in the field of complex systems. They will find a detailed survey of the Brownian agent method and they might get good hints for further research in some of the fascinating fields herein discussed."
- Enrico Scalas (econophysics.org)
"[a ]] the author explores such diverse topics as pattern formation in reaction diffusion systems, self organisations of networks, tracks and trail formations in biological systems, movement and trailformation by pedestrians, urban aggregation, economic aggregations and spatial opinion structures in social systems. The topics are selected thoughtfully and the presentation is lucid. It is an extremely useful text for graduate students who are thinking of working on some problem in non equilibrium statistical physics." (Jayanta K. Bhattacharjee, Indian Journal of Physics 2004, vol. 78, page 1011)
"This book is organized around two ideas. First, the link between the micro- and the macro-behaviour of systems and secondly, the idea of a Brownian agent. a ] Many of these models and ideas have been circulating for some time and will be found in specialist publications. It is helpful to have them brought together and systematically expounded in this book which both unifies what exists and paves the way for new developments." (Professor D. J. Bartholomew, Contemporary Physics, Vol. 45 (4), 2004)
"The aim of the book is to show that a large set of phenomena in natural and social sciences can be studied by writing down equations of motion for the pertinent Brownian agents. a ] The topics are selected thoughtfully and the presentation is lucid. It is an extremely useful text for graduate students who are thinking of working on some problem in non equilibrium statistical physics." (Jayanta K Bhattacharjee, Indian Journal of Physics, Vol. 78 (9), 2004)
"Schweitzer begins by presenting a detailed derivation of the generic equations for a Brownian Agent, based upon the well-known concepts of Brownian particles, and the Fokker-Planck and Langevin equations. a ] The strength of this book lies in its explicit identification of the Agent as being the important factor in modeling andsimulation. a ] this book presents an interesting and useful point of view, one that will become more common as models develop. a ] it is certainly an interesting one." (James Sneyd, SIAM Review, Vol. 46 (2), 2004)Reseña del editor:
"This book lays out a vision for a coherent framework for understanding complex systems'' (from the foreword by J. Doyne Farmer). By developing the genuine idea of Brownian agents, the author combines concepts from informatics, such as multiagent systems, with approaches of statistical many-particle physics. This way, an efficient method for computer simulations of complex systems is developed which is also accessible to analytical investigations and quantitative predictions. The book demonstrates that Brownian agent models can be successfully applied in many different contexts, ranging from physicochemical pattern formation, to active motion and swarming in biological systems, to self-assembling of networks, evolutionary optimization, urban growth, economic agglomeration and even social systems.
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