Bishkek, Kyrgyzstan

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Dzhunushaliev V.,Kyrgyz Russian Slavic University | Dzhunushaliev V.,National Academy of Science Kyrgyz Republic
Annalen der Physik (Leipzig) | Year: 2010

It is shown that the Hamilton equations in supersymmetric quantum mechanics can be presented in nonassociative form, where the Hamiltonian is decomposed into two nonassociative factors. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Deev E.V.,Russian Academy of Sciences | Korzhenkov A.M.,Kyrgyz Russian Slavic University
Russian Geology and Geophysics | Year: 2016

The area of the Chon-Aksu and Kichi-Aksu grabens abounds in seismic deformation produced by historic and prehistoric events, among which the great Kemin (Kebin) earthquake of 1911, with a magnitude of Ms - 8 and a shaking intensity of I0 = 10-11, generated by the Aksu fault. Trenching across a fault scarp of the 1911 event has revealed signatures of reverse slip resulted from another earthquake that occurred about 3000 years ago. Traces of a large event at ~12,700 yr BP appear in sediments of a tectonically dammed lake. The trenching results, along with radiocarbon dating and published evidence, show the Late Pleistocene-Holocene history of the Aksu fault to comprise prolonged quiescence periods separated by large earthquakes or earthquake clusters at 19,500-20,000, 12,700, 4000-3000, and <850 yr BP (including the 1911 Kemin shock). © 2015.

Karaseva M.O.,Kyrgyz Russian Slavic University | Prakash S.,Atmospheric and Oceanic science Group | Gairola R.M.,Atmospheric and Oceanic science Group
Theoretical and Applied Climatology | Year: 2012

This paper presents the validation of monthly precipitation using Tropical Rainfall Measuring Mission Multisatellite Precipitation Analysis (TMPA)-3B43 product with conventional rain gauge observations for the period 1998-2007 over Kyrgyzstan. This study is carried out to quantify the accuracy of TMPA-3B43 product over the high latitude and complex orographic region. The present work is quite important because it is highly desirable to compare the TMPA precipitation product with the ground truth data at a regional scale, so that the satellite product can be fine-tuned at that scale. For the validation, four different types of spatial collocation have been used: station wise, climatic zone wise, topographically and seasonal. The analysis has been done at the same spatial and temporal scales in order to eliminate the sampling biases in the comparisons. The results show that TMPA-3B43 product has statistically significant correlation (r = 0.36-0.88) with rain gauge data over the most parts of the country. The minimum linear correlation is observed around the large continental water bodies (e. g., Issyk-Kul lake; r = 0.17-0.19). The overall result suggests that the precipitation estimated using TMPA-3B43 product performs reasonably well over the plain regions and even over the orographic regions except near the big lake regions. Also, the negative bias suggests the systematic underestimation of high precipitation by TMPA-3B43 product. The analyses suggest the need of a better algorithm for precipitation estimation over this region separately to capture the different types of rain events more reliably. © 2011 Springer-Verlag.

Avtaeva S.,Kyrgyz Russian Slavic University
European Physical Journal D | Year: 2014

Time-dependent characteristics of the dielectric barrier discharge in Xe-Cl2 mixture at chlorine concentration of 0.5% and kinetic processes governing the generation of XeCl∗ molecules are studied using the 1D fluid model. It is shown that at low voltage amplitude (5 kV) a one-peak mode of the discharge is observed and at high voltage amplitude (7 kV) a two-peak mode of the discharge appears. The radiation power of the XeCl∗ band increases with amplitude of the supply voltage. It is demonstrated that the harpoon reaction Xe∗ + Cl2 → XeCl∗ + Cl provides the greatest contribution into generation of XeCl∗ exciplex molecules during short current pulses and the ion-ion recombination Xe+ 2 + Cl- → XeCl∗ + Xe provides the greatest contribution during afterglow. Quenching of XeCl∗ molecules is a result of the radiative decay XeCl∗ → Xe + Cl + hv (308 nm). During current spike the great contribution into quenching of XeCl∗ provides also the dissociative ionization e + XeCl∗ → Xe+ + Cl + 2e. © 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

Erem'yants V.E.,Kyrgyz Russian Slavic University
Journal of Mining Science | Year: 2011

Based on the review over theoretical and experimental analyses of influence the drilling machine hammer design exerts on the rock fracture process efficiency, the author draws a conclusion that hammers with curvilinear side surfaces are not an optimal choice as they do ot provide a noticeable increase in the impact energy utilization while greatly limit the energy transfer to a work face via a drill rod without breaking the rod. © 2011 Pleiades Publishing, Ltd.

Avtaeva S.V.,Kyrgyz Russian Slavic University
High Temperature | Year: 2010

The effect made by xenon concentration and by reduced electric field on the parameters of electrons in Xe-Ne mixtures is numerically studied. It is demonstrated that the increase in xenon concentration in mixture leads to a decrease in the average electron energy, to an increase in the frequency of collisions of electrons with gas atoms, and to variation of the transport coefficients of electrons. The increase in xenon concentration in mixture above ∼10% leads to an abrupt slowing down of the rates of excitation of xenon atoms. The efficiency of ionization increases with the xenon concentration increasing to∼7%. The fraction of electron energy spent for excitation of xenon decreases with increasing electric field, and more energy is put into the ionization of xenon and into excitation and ionization of neon. The results of calculation of parameters of electrons make it possible to limit the search for xenon concentrations in Xe-Ne mixture, which are optimal for vacuum ultraviolet radiation, to the range of 1-10%. © Pleiades Publishing, Ltd., 2010.

Kerimbekov A.,Kyrgyz Russian Slavic University
Proceedings of the World Congress on Engineering 2011, WCE 2011 | Year: 2011

In the paper we investigate solvability of nonlinear optimal Thermal and Diffusion processes control problems defined by semi-linear parabolic equations when the source function nonlinearly depends on the controlling parameters, and nonlinear integral criterion of quality is minimized. We obtained the sufficient conditions of uniqueness of the solution of the boundary value problem and the adjoint boundary value problem of control process. It is established that optimal control is described as a solution of the complex structure nonlinear integral equation with additional condition in the form of the differential inequality, and the algorithm to determination of the optimal control was constructed. semi-linear parabolic equations, weak generalized solution, nonlinear optimization problem, optimality conditions, differential inequality, nonlinear integral equation of optimal control, factorization method.

Avtaeva S.V.,Kyrgyz Russian Slavic University
IEEE Transactions on Plasma Science | Year: 2014

Formation of secondary current pulses in the dielectric barrier discharge in Xe-Cl2 mixture is studied using 1-D fluid model. The effect of amplitude of 100-kHz harmonic voltage on the discharge characteristics at pressure 200 torr and chlorine concentration 0.5% has been investigated and discussed. In the dielectric barrier discharge (DBD), at low voltage amplitude a current pulse appears once per a half-cycle of a voltage. However, with increase in voltage amplitude a secondary pulse follows the primary current pulse. Charge, transferred by a current pulse, does not depend on a voltage, so at big voltage the charge is insufficient for neutralization of surface charges of dielectrics. It is a principal cause of developing the secondary current pulses in DBDs. © 2013 IEEE.

Dzhunushaliev V.,Kyrgyz Russian Slavic University | Dzhunushaliev V.,Institute of Physicotechnical Problems and Material Science | Folomeev V.,Institute of Physicotechnical Problems and Material Science | Minamitsuji M.,Sogang University
Reports on Progress in Physics | Year: 2010

This paper gives a comprehensive review on thick brane solutions and related topics. Such models have attracted much attention from many aspects since the birth of the brane world scenario. In many works, it has been usually assumed that a brane is an infinitely thin object; however, in more general situations, one can no longer assume this. It is also widely considered that more fundamental theories such as string theory would have a minimal length scale. Many multidimensional field theories coupled to gravitation have exact solutions of gravitating topological defects, which can represent our brane world. The inclusion of brane thickness can realize a variety of possible brane world models. Given our understanding, the known solutions can be classified into topologically non-trivial solutions and trivial ones. The former class contains solutions of a single scalar (domain walls), multi-scalar, gauge-Higgs (vortices), Weyl gravity and so on. As an example of the latter class, we consider solutions of two interacting scalar fields. Approaches to obtain cosmological equations in the thick brane world are reviewed. Solutions with spatially extended branes (S-branes) and those with an extra time-like direction are also discussed. © 2010 IOP Publishing Ltd.

Avtaeva S.V.,Kyrgyz Russian Slavic University | Saghi B.,University of Science and Technology of Oran | Rahmani B.,University of Science and Technology of Oran
IEEE Transactions on Plasma Science | Year: 2011

The 1-D fluid model of the two-barrier Xe-Cl2 excilamp radiating at wavelength of 308 nm is developed. The radiation is excited in a 4-mm gas gap between dielectric-layers-covered metallic electrodes using the dielectric barrier discharge (DBD). The spatio-temporal characteristics of the DBD for 0.99Xe-0.01Cl2 mixture at pressure 250 torr are simulated at applying to the electrodes sinusoidal voltage with a frequency of 100 kHz and an amplitude of 4.25 kV. The average power density inputted in the discharge is 2.8 W/cm3 per cycle and outputted in the form of the ultraviolet emission is 0.78 W/cm3 per cycle. It is shown that additive of 1% molecular chlorine to xenon allows getting ∼ 90% radiation on XeCl * molecule band (308 nm) at the discharge radiative efficiency ∼26%. For most parts of the voltage cycle, the Xe-Cl2 plasma is electronegative, and the most abundant ions are Xe2+ and Cl-. However, at propagation of a current pulse over discharge gap, the plasma becomes electropositive near dielectric surface, where the most abundant charged particles become electrons and Xe+ ions. © 2011 IEEE.

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