Congestion phenomena caused by matching pennies in evolutionary games

Evolutionary social dilemma games are extended by an additional matching-pennies game that modifies the collected payoffs. In a spatial version players are distributed on a square lattice and interact with their neighbors. Firstly, we show that the matching-pennies game can be considered as the microscopic force of the Red Queen effect that breaks the detailed balance and induces eddies in the microscopic probability currents if the strategy update is analogous to the Glauber dynamics for the kinetic Ising models. The resulting loops in probability current breaks symmetry between the chessboard-like arrangements of strategies via a bottleneck effect occurring along the four-edge loops in the microscopic states. The impact of this congestion is analogous to the application of a staggered magnetic field in the Ising model, that is, the order-disorder critical transition is wiped out by noise. It is illustrated that the congestion induced symmetry breaking can be beneficial for the whole community within a certain region of parameters.Comment: 7 pages, 6 figure

Diverging fluctuations in a spatial five-species cyclic dominance game

A five-species predator-prey model is studied on a square lattice where each species has two prey and two predators on the analogy to the Rock-Paper-Scissors-Lizard-Spock game. The evolution of the spatial distribution of species is governed by site exchange and invasion between the neighboring predator-prey pairs, where the cyclic symmetry can be characterized by two different invasion rates. The mean-field analysis has indicated periodic oscillations in the species densities with a frequency becoming zero for a specific ratio of invasion rates. When varying the ratio of invasion rates, the appearance of this zero-eigenvalue mode is accompanied by neutrality between the species associations. Monte Carlo simulations of the spatial system reveal diverging fluctuations at a specific invasion rate, which can be related to the vanishing dominance between all pairs of species associations.Comment: accepted for publication in Physical Review

The role of the ERENET Network in harmonizing university enterpreneurial education syllabuses in CEE

The paper presents the historical backround of the establishment of the Entrepreneurship research and Development network among the Central and Eastern European Universities - ERENET. It presents the basic declaration, its legal status, iam and main fields of activities. Special emphasis is given to strenghten the Central European Set of Values. It descrices the main projects carried our by ERENET and summariyes the major events. Last it referrs to the basic international relations of the organization.

Paradigmawechsel in der Marketingstrategie und in dem Organisationsverhalten

Ein Auge des Forschers, der sich mit dem Thema der Wettbewerbfähigkeit beschäftigt, weint, das andere lacht. Lacht, da während Paradigmawechsel von der Seite der Wettkampfähigkeit ernähert wurde, konnte eine neue wettbewerbfähige Herausforderung in dem Marketings-und Organisationsverhalten gefunden werden. Diese kann als Beziehungsmarketing bzw Empowerment – also mit Begriffe der sozialen Konstruktionen definiert werden. Das andere Auge weint aber, weil die Zeichen des Paradigmawechsels, die die Unternehmenskultur verändern sollten, in der Zentralregion von Ungarn kaum zu spüren sind. Das mag die Ausbildung einer Wettbewerb behindernden Situation verursachen. Key words: Paradigmawechsel, marketing-begriffentwicklung, Organisation-Verhalten- Veränderung, Wettbewerbsfähigkeit-Entwicklung, Wettbewerbsfähigkeitsmodellen

Phase transitions for rock-scissors-paper game on different networks

Monte Carlo simulations and dynamical mean-field approximations are performed to study the phase transitions in rock-scissors-paper game on different host networks. These graphs are originated from lattices by introducing quenched and annealed randomness simultaneously. In the resulting phase diagrams three different stationary states are identified for all structures. The comparison of results on different networks suggests that the value of clustering coefficient plays an irrelevant role in the emergence of a global oscillating phase. The critical behavior of phase transitions seems to be universal and can be described by the same exponents.Comment: 4 pages, 4 figures, to be published in PR

Calmodulin in Complex with Proteins and Small Molecule Ligands: Operating with the Element of Surprise. Implications for Structure-Based Drug Design

Calmodulin plays a role in several life processes, its flexibility allows binding of a number of different ligands from small molecules to amphiphilic peptide helices and proteins. Through the diversity of its functions, it is quite difficult to find new drugs, which bind to calmodulin as a target. We present available structural information on the protein, obtained by X-ray diffraction, nuclear magnetic resonance spectroscopy and molecular modeling and try to derive some conclusions on structureactivity relationships