Crow Kimura model is one an of the famous models of population genetics. We consider the Crow-Kimura model of evolutionary dynamics on the two dimensional fitness landscape with a single peak. We deduce exact solution for the dynamics.
In quiet low-latitude Earth's ionosphere, a rather developed current system that is responsible for the Sq magnetic-field variations is formed in quiet sunny days under the action of tidal streams. The density of the corresponding currents is maximal at the equatorial latitudes in the midday hours, where the so-called equatorial current jet is formed. In this work, we discuss the nature of the equatorial current jet. The original part of this paper is dedicated to the study of the value of its response to external effects. First of all, it is related to estimating the possibility of using the equatorial current jet for generating the low-frequency electromagnetic signals during periodic heating of the ionosphere by the heating-facility radiation. The equatorial current jet can also produce electrodynamic response to the natural atmospheric processes, e.g., an acoustic-gravitational wave.
Discusses the importance and function of historical Park territories in the system of biosphere processes. Their main feature is the combination of natu-ral and man-made components in a single ecological space that leads to com-plexity in examining these territories and the importance of understanding the laws of their development in the context of global and regional natural processes.
The deterioration, on a large scale, of the ecological situation during the industrial era was followed by a period of complicated multi-vectored positive and negative ecological processes in the world at large and within certain regions. If the current trend of change in the global ecological situation persists, the next few decades may see its general stabilization.
The article is devoted to systematization of the mechanisms of "green public procurement" in Russia and to the analysis of the possible directions of their development of their development. In the article are investigated opportunities and restrictions connected with use of ecological requirements and criteria in procurement procedures are analyzed and the conclusion about need of development at the national level of the concept of "green public procurement" is drawn.
An experimental study of small-scale mineral particles in the atmosphere over Kyrgyzstan is carried out. It is shown that the substance of the studied particles corresponds to quartz-enriched minerals, feldspars, layered silicates, minerals containing lime carbonate, etc. Overall, there is a definite correspondence between the mineral particle compositions in the atmosphere of Kyrgyzstan and in the other regions of Central Asia. The constructed size-distribution functions of the particles agree with the results of studying the dust aerosol properties in the deserts of Central Asia obtained in the southwestern part of Tajikistan in 1989.
We studied the expression of peroxiredoxin genes (PRDX1, PRDX2, PRDX3, and PRDX6) in human erythroleukemia K652, human breast carcinoma MCF-7, and human ovarian carcinoma SKOV-3 cells during cisplatin resistance development. It was found that drug resistance formation was accompanied by a significant increase in the expression of PRDX1, PRDX2, PRDX3, PRDX6 genes in all cancer cell strains, which confirms the important contribution of redox-dependent mechanisms into the development of cisplatin resistance of cancer cells.
The paper looks at the impact of imperfect assessment of water discharge on the level of surface water pollution and allocation of environmental budget in a framework of one river basin region. Analysis is based on the partial equilibrium model with unidirectional spatially accumulated external effect in the presence of partial natural absorbtion. The effect of water discharge assessment imperfection on the level of water pollution at every location and social welfare is investigated. It is shown that decentralization accompanied by the improvement in water discharge quality assessment may reduce the welfare loss. However, even under complete elimination of assessment imperfections resource allocation under decentralization is still inefficient.
качество воды, потери в благосостоянии, искажения в оценке загрязнения, децентрализация, Water discharge quality, welfare loss, imperfect assessment, Decentralization