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Zhekamukhov M.K.,Kabardino-Balkarian State University | Abshaev A.M.,High Mountain Geophysical Institute
Russian Meteorology and Hydrology | Year: 2012

Considered is the kinetics of the Brownian coagulation in disperse systems formed as a result of crystallizing reagent dispersion by detonation method. Estimated is the yield of crystals from one gram of the reagent. It is demonstrated that the crystals formed after the completion of processes of the explosive gas cloud expansion have the average charge equal to about a thousand elementary charges. © 2012 Allerton Press, Inc.

Adzhiev A.K.,High Mountain Geophysical Institute | Kupovykh G.V.,Southern Federal University
Izvestiya - Atmospheric and Ocean Physics | Year: 2015

The measurements of the atmospheric electric field potential gradient are analyzed simultaneously at the two high-mountain stations in the vicinity of Mt. Elbrus: Cheget Peak and Terskol Peak, as well as the Kyzburun mountain station located at the end of the Baksan ravine. A global component in the diurnal variation in the electric field is revealed: the morning minimum (01-04 UT) and the evening maximum (19-21 UT), which conforms to the unitary variation in the ionospheric potential, as well as the daylight maximum (08-12 UT) caused by the action of the local generators in the surface layer. The features of the seasonal variation in the electric field are studied. © 2015, Pleiades Publishing, Ltd.

Dokukin M.D.,High Mountain Geophysical Institute | Shagin S.I.,Ministry of Emergency Situations of Russia in the Kabardino Balkar Republic
Earth's Cryosphere | Year: 2014

Data on the dynamics of glacial lakes located on the territory of the Malka, Baksan, Chegem, Cherek (Kabardino-Balkaria, Central Caucasus) river basins and other mountain areas are reported. The glacial lakes with underground drain channels have been examined. They are notable for the significant water level fluctuations up to the total disappearance of the lakes in winter season and for manifestations of debris flow of varying seale.

Anakhaev K.N.,High Mountain Geophysical Institute
Doklady Physics | Year: 2016

The calculated dependences in elementary functions for determining the modular elliptic function λ(τ) =λ1 + iλ2 obtained on the basis of consecutive (six) conformal mappings of a curvilinear triangle to a complex half-plane are presented. Comparison of the values of λ(τ) from the proposed dependences with the results of the Hamel–Gunter exact analytical solution for the boundary contour of the curvilinear triangle, i.e., the real axis of the complex half-plane, gives a very close coincidence (with the largest error of ≤1%). The use of the complex values of the function λ(τ) for the entire internal region of the curvilinear triangle makes it possible to solve one of the most difficult problems of the theory of filtration (filtration through a rectangular dam) in the direct formulation and, for the first time, to construct the pattern of an equal filtration-rate field (the family of isotaches) over the entire internal region of the dam. In this case, the boundary values of filtration rates for special cases (along the sides and along the base of the dam) completely coincide with the results of the Masket exact analytical calculations. © 2016, Pleiades Publishing, Ltd.

Anakhaev K.N.,High Mountain Geophysical Institute
Doklady Physics | Year: 2014

In this work, as a continuation of rigorous solutions of the mathematical pendulum theory, calculated dependences were obtained in elementary functions (with construction of plots) for a complete description of the oscillatory motion of the pendulum with determination of its parameters, such as the oscillation period, deviation angles, time of motion, angular velocity and acceleration, and strains in the pendulum rod (maximum, minimum, zero, and gravitational). The results of calculations according to the proposed dependences closely (≪1%) coincide with the exact tabulated data for individual points. The conditions of ascending at which the angular velocity, angular acceleration, and strains in the pendulum rod reach their limiting values equal to (Formula presented.) and 5m1g, respectively, are shown. It was revealed that the angular acceleration does not depend on the pendulum oscillation amplitude; the pendulum rod strain equal to the gravitation force of the pendulum Rs = m1g at the time instant (Formula presented.) is also independent on the amplitude. The dependences presented in this work can also be invoked for describing oscillations of a physical pendulum, mass on a spring, electric circuit, etc. © 2014, Pleiades Publishing, Ltd.

Makitov V.S.,High Mountain Geophysical Institute | Inyukhin V.S.,High Mountain Geophysical Institute | Kalov H.M.,High Mountain Geophysical Institute | Kalov R.H.,High Mountain Geophysical Institute
Natural Hazards | Year: 2016

The results of the analysis of long-term radar research of the hailstorms over the central part of the Northern Caucasus are presented. Radar observations which formed the basis of experimental material were carried out continuously from the moment of the first radar echo registration until complete dissipation of the hailstorm. The computerized system of collecting, processing and the analysis of the radar information was used. Time discretization of the radar parameters of the full spatial observation averaged 3 min. Statistical sampling of radar data included 392 hail cells, for each of which the time distributions of the radar parameters both measured and calculated using the computerized system were compiled. Distribution of the hailstorms first radar echo formation zones over the observation region was compiled. Areas with the maximum frequency of the hailstorms first radar echo formation were defined. The hailstorm trajectories were analyzed. Four main types of hail cell trajectories were selected, which included 86 % of the supercells and 64 % of the long-lived multicells. The dynamic parameters of the hail core formation and development were analyzed. The hail storm characteristics of the Northern Caucasus are compared to the hail storms of Mendoza, Argentina, and Alberta, Canada. The bases of the organization of regional hail suppression services which use the rocket technology of cloud seeding are presented. The results of the cloud seeding operations during recent years are shown. © 2016 Springer Science+Business Media Dordrecht

Anakhaev K.N.,High Mountain Geophysical Institute
Doklady Physics | Year: 2012

Hydrodynamic calculation of potential flow from the impact of a plate onto water was reported. The plane problem of a plate (2a in width, d thick, and with a density p) falling onto the smooth surface of an ideal (incompressible) fluid of infinite depth with the velocity was considered. The problem is solved using the theory of a function of a complex variable by the method of consecutive conformal maps of the physical flow region to the complex-potential region. The obtained rigorous hydromechanical solution makes it possible to find all necessary parameters of the potential flow arising at the moment of the plate impact onto water for the full (unit) value at an arbitrary point of the flow region.

Zalikhanov M.C.,High Mountain Geophysical Institute | Kondratieva N.V.,High Mountain Geophysical Institute | Adzhiev A.K.,High Mountain Geophysical Institute | Razumov V.V.,High Mountain Geophysical Institute
Doklady Earth Sciences | Year: 2016

The area of investigation was subject to multifactor analysis of the relationship between the maximum amount of mudflow solid sediments (W) and parameters such as the mudflow basin area (S), average channel slope (α), and mudflow channel length (L). They were used to obtain analytical expressions in order to approximate the W(S, L, α) relation based on the mudflow genesis and source height. Statistical data on mudflow manifestations in different basins in the North Caucasus covering more than fifty years were used to obtain the analytical expressions in order to assess the maximum volume of mudflow solid sediments. © 2016, Pleiades Publishing, Ltd.

Kagermazov A.K.,High Mountain Geophysical Institute
Russian Meteorology and Hydrology | Year: 2012

A technique is described of the perfect prognosis of hail on the basis of the statistical interpretation of output data of the atmospheric global model (T254, NCEP) for the area of Caucasus Mineral Waters with the lead time of 18-24 h. An estimation is carried out of the accuracy of hail forecasts based on the proposed technique as compared with the traditional approaches. © 2012 Allerton Press, Inc.

Zharashuev M.V.,High Mountain Geophysical Institute
Russian Meteorology and Hydrology | Year: 2012

Carried out is the statistical analysis of hail activity on the territories of Stavropol krai and Crimea using the automatic determination and computation of parameters of convective cells. Analyzed is the thunderstorm-hail activity for several years of radar observations. © 2012 Allerton Press, Inc.

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