Врахування факторів впливу на розвиток девіантних процесів в умовах євроінтеграції (Consideration of impacts on the development of deviant processes in European integration)

У статті розглянуто фактори дивергенції та конвергенції, що відбуваються у сучасному суспільстві. Визначено конвергентні та дивергентні сили, які діють у процесах євро інтгерації, що знайшло відображення у моделі конвергенції-дивергенції. Окреслено особливості появи соціальних девіацій та вказано на їх різну природу в європейських країнах та в Україні. Обґрунтовано необхідність врахування цих особливостей у системі державного управління. (In the article the factors of divergence and convergence taking place in modern society. Defined convergent and divergent forces that are in the process yevrointheratsiyi, as reflected in the model convergence-divergence. The peculiarities of the emergence of social deviations and given their different nature in Europe and in Ukraine. The necessity of including these features in public administration.

Competing Patterns of Signaling Activity in Dictyostelium discoideum

Quantitative experiments are described on spatio-temporal patterns of coherent chemical signaling activity in populations of {\it Dictyostelium discoideum} amoebae. We observe competition between spontaneously firing centers and rotating spiral waves that depends strongly on the overall cell density. At low densities, no complete spirals appear and chemotactic aggregation is driven by periodic concentric waves, whereas at high densities the firing centers seen at early times nucleate and are apparently entrained by spiral waves whose cores ultimately serve as aggregation centers. Possible mechanisms for these observations are discussed.Comment: 10 pages, RevTeX, 4 ps figures, accepted in PR

Dependence of fish school movement and plankton spatial distributions on the phytoplankton growth rate

In this paper we investigate the spontaneous emergence and the dynamics of patchiness in spatially distributed communities of plankton, which plays a key role in the matter rotation on earth. Patchiness is often supposed to be due to hydrodynamical factors (diffusion and advection). In contrast to this approach, we consider the formation of plankton patches as a result of interactions in the trophic chain nutrient - phytoplankton - zooplankton-fish. We present a mathematical model of such interactions, which combines a continuous description of the plankton spatio-temporal dynamics and a discrete description of the fish school movement. We show that the fish school can give rise to plankton patches. In turn, fish school walks are shown to depend on phytoplankton growth rate. We show also that the Hurst exponent characterizing the fish school movement in the diffusion approximation depends on phytoplankton growth rate.</p