Evolution of vacancy pores in bounded particles

In the present work, the behavior of vacancy pore inside of spherical particle is investigated. On the assumption of quasistationarity of diffusion fluxes, the nonlinear equation set was obtained analytically, that describes completely pore behavior inside of spherical particle. Limiting cases of small and large pores are considered. The comparison of numerical results with asymptotic behavior of considered limiting cases of small and large pores is discussed.Comment: 25 pages, 10 figure

Comparative Assessment of the Factors and Conditions of the Formation of the Neoindustrial Social State in Russia and Germany

Russia and Germany are traditionally reputed as countries with socially oriented economies. Namely, these countries are also close by the index of the share of real sector of economy at GDP. And however, Germany is a founder of social market household largely defined its leadership in world economy, in current conditions of crisis of “the state of general welfare” the search of a new model of development for Germany is also important as for Russia stood on the way of modernization and neo-industrialization. In the article, the hypothesis about forming of the new model of development uniting the social orientation of economy, processes of neoindustrialization, and globalization is made. At the same time, the social orientation is the main aim of socio-economic development, neo-industrialization is a way to achieve it, and globalization is a criterion presupposing more effective use of resources. Theoretical backgrounds of development of “social state” are generalized in the works of German and Russian classics put the backgrounds of economic humanism, it has allowed to prove the fatality of modernization process without considering of deep mental backgrounds and civilization codes of the nation development. The methodological approaches to development of a new model of neo-industrial social state with emphasizing different levels: global, national, local, individual are worked out; and the technique for estimation of factors and conditions of its development is proposed. The technique is tested on the example of Russia and Germany. The comparative analysis conducted has allowed to make the conclusion about similarity of target guidelines, initial conditions, problems and ways of their solving in these countries, that is to be considered both in a strategy and a policy of socio-economic development of these countries and by their international partnership

Wetlands management in Vietnam: issues and perspectives

Wetlands, Resource management, Resource conservation, WorldFish Center Contrib. No. 1692, Viet Nam, Mekong Delta,

Wetlands management in Cambodia: socioeconomic, ecological, and policy perspectives

The papers in this volume were initially prepared for a workshop organized in April 2001 in Siem Reap, Cambodia, under the auspices of the project, " Legal and institutional framework and economic valuation of resources and environment in the Mekong River Region- a wetlands approach." The first three papers provide an essential survey of the importance of wetlands, trends affecting their health and propductivity, and priority actions in response. The next three papers focus on the social, institutional, and legal challenges of wetlands management in the country. The final three papers address the problems of assessing and enhancing the value of wetlands.Wetlands, Resource management, Socioeconomic aspects, Policies, Environment management, Cambodia,

Cation Transport in Polymer Electrolytes: A Microscopic Approach

A microscopic theory for cation diffusion in polymer electrolytes is presented. Based on a thorough analysis of molecular dynamics simulations on PEO with LiBF$_4$ the mechanisms of cation dynamics are characterised. Cation jumps between polymer chains can be identified as renewal processes. This allows us to obtain an explicit expression for the lithium ion diffusion constant D_{Li} by invoking polymer specific properties such as the Rouse dynamics. This extends previous phenomenological and numerical approaches. In particular, the chain length dependence of D_{Li} can be predicted and compared with experimental data. This dependence can be fully understood without referring to entanglement effects.Comment: 4 pages, 4 figures, Physical Review Letters in pres

Imaging of fuel mixture fraction oscillations in a driven system using acetone PLIF

Measurements of fuel mixture fraction are made for a jet flame in an acoustic chamber. Acoustic forcing creates a spatially-uniform, temporally-varying pressure field which results in oscillatory behavior in the flame . Forcing is at 22,27, 32, 37, and 55 Hz. To asses the oscillatory behavior, previous work included chemiluminescence, OH PUF, nitric oxide PUF imaging, and fuel mixture fraction measurements by infrared laser absorption. While these results illuminated what was happening to the flame chemistry, they did not provide a complete explanation as to why these things were happening. In this work, the fuel mixture fraction is measured through PUF of acetone, which is introduced into the fuel stream as a marker. This technique enables a high degree of spatial resolution of fuel/air mixture value. Both non-reacting and reacting cases were measured and comparisons are drawn with the results from the previous work. It is found that structure in the mixture fraction oscillations is a major contributor to the magnitude of the flame oscillations