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Saint Petersburg, Russia

Sasunkevich A.A.,Mozhaiskii Military Space Academy | Sorokin L.N.,Polytechnic University of Mozambique | Usychenko V.G.,Polytechnic University of Mozambique
Journal of Communications Technology and Electronics

Burnout of silicon transistors under the action of a periodic train of electric pulses is experimentally studied. A numerical model and a more physically demonstrative analytical model of the pulse-to-pulse heat accumulation are in qualitative and, to a certain extent, quantitative agreement with the measured results. It is demonstrated that catastrophic failure takes place at a melting point of silicon but additional heat is needed for melting of low-temperature eutectics. © 2016, Pleiades Publishing, Inc. Source

Shuleikin V.N.,Russian Academy of Sciences | Shchukin G.G.,Mozhaiskii Military Space Academy
Russian Meteorology and Hydrology

Increase in the amplitudes of microseisms within the range from the tenths of hertz to 10 kHz leads to increase in the values of air polar conductivity and to decrease in atmospheric electric field. As the frequency of microseisms decreases, the efficiency of microseismic impact increases. In case of low amplitudes of microseisms, decrease in atmospheric electric field is observed only as a result of multimonth active impact on the geologic environment. © 2015, Allerton Press, Inc. Source

Smagin V.A.,Mozhaiskii Military Space Academy
Automatic Control and Computer Sciences

A brief history of introducing the delta function on a complex plane is presented. The proof of the mathematical form of the complex delta function is given. An example of applying the complex delta function for finding the stationary value of an alternating random accumulation process with the informational income and expenditure is presented. © 2014 Allerton Press, Inc. Source

Pirogov S.Y.,Mozhaiskii Military Space Academy
Technical Physics

The spatio-temporal gasdynamic structures of plasma formations produced in a hypersonic air flow by a focused high-power laser beam are analyzed numerically using the model of inviscid non-heat-conducting equilibrium radiating air. The reasons for the emergence of pulsating gasdynamic nonuniformity in the region between the bow shock wave and the intense laser radiation absorption zone are investigated. © 2013 Pleiades Publishing, Ltd. Source

Stepashkina A.S.,Saint Petersburg State University | Aleshin A.N.,RAS Ioffe Physical - Technical Institute | Rymkevich P.P.,Mozhaiskii Military Space Academy
Physics of the Solid State

A composite material based on a polypropylene matrix and carbon fillers has been fabricated in the form of films and blocks. It has been shown that the dependence of the resistivity of the composite on the filler weight fraction has a threshold character. The current-voltage characteristics of composite films have been measured at different temperatures in the range of 80–360 K. The temperature dependence of the resistivity of the composites at different filler weight fractions has been found. A theoretical description of current-voltage characteristics at different temperatures has been presented. © 2015, Pleiades Publishing, Ltd. Source

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