Experimental verification of extended theories of gravity
Experimental verification of extended theories of gravity
K.A. Rannu, P.I. Dyadina
Parameterized post-Newtonian formalism is one of methods for experimental verification of gravity theories and imposing additional limits on their parameters' values. The Gauss-Bonnet model with scalar field is studied using the PPN-formalism in the present work. The scenario with 7 noncompact extra dimensions namely the Randall-Sundrum II model is considered as the alternative to geometrical approach to GR extension.
Show AbstractInfluence of dielectric matrix on the dissipative tunnel transfer in semiconductive quantum dots
Influence of dielectric matrix on the dissipative tunnel transfer in semiconductive quantum dots
V.Ch. Zhukovsky, V.D. Krevchik, M.B. Semenov, R.V. Zaitsev, I.A. Egorov, P.V. Krevchik, A.K. Aringazin, К. Yamamoto
A model of 1D - dissipative tunneling to interpret the features of tunneling current-voltage characteristics obtained in the experiment for the visualization of the local density of states in quantum dots InAs / GaAs by a combined AFM / STM has been supposed. It was found that the influence of two local modes of the wide-band matrix on the probability of 1D - dissipative tunneling leads to the appearance of several randomly spaced peaks in the relevant field dependence. It is shown that the theoretical dependence for the tunnel probability agrees qualitatively with the experimental current-voltage characteristics of contact AFM probe to the surface of the InAs QDs.
Show Abstract112Cd ISOTOPE PHOTODISINTEGRATION
112Cd ISOTOPE PHOTODISINTEGRATION
S. S. Belyshev, B. S. Ishkhanov, V. N. Orlin, K. A. Stopani, V. V. Khankin, N. V. Shvedunov
The results of measurements of reaction yields for photodisintegration of 112Cd isotope, irradiated by bremsstrahlung radiation with maximal energy 55 MeV are presented in current work. Obtained results are compared with theoretical calculations.
Show AbstractA relational version of modified newtonian dynamics (MOND)
A relational version of modified newtonian dynamics (MOND)
Vladimirov Yury Sergeevich, Romashka Mikhail Yurievich
Modified newtonian dynamics (MOND) is intended for description of galaxy rotation curves and some other astrophysical phenomena without introduction of the dark matter hypothesis, which seems to encounter serious difficulties. Being rather simple and rich of its consequences, it leaves several questions concerning what physics underlies it. In present work, after brief discussion of the well-known versions of MOND, a new, relational version is proposed, which is based, firstly, on statistical approach to the nature of space-time, and secondly, on the idea of P. K. Rashevsky about modification of classical space-time relations at large distances. In the framework of the proposed approach the effect of gravitational deflection of light is considered.
Show AbstractSift of the mass of a charge in the field of (1+n)-- dimensional black hole: dimensional regularization
Sift of the mass of a charge in the field of (1+n)-- dimensional black hole: dimensional regularization
Grats Yury Vladimirovich
The expression for the self-energy and the shift of mass of a classical charge in the space-time of~$(1+n)$~-- dimensional Schwarzschild black hole is obtained with the use of the dimensional regularization method. It is shown that dimensional regularization leads to the results which are in agreement with the results obtained with the use of other methods of regularization.
Show AbstractEvolution of stratified currents system during upwelling
Evolution of stratified currents system during upwelling
Barbanova E.S. (Elena Sergeyevna)
The paper presents experimental results and results of theoretical studies of evolution of stratified currents system, which includes upwelling-induced currents, seiche-induced wave currents and density currents in Volkhov bay, Lake Ladoga. It was discovered that in the near bottom layer coastal upwelling prevails. It was found that upwelling provides bay's water purification in a moderate breeze. Blocking of submerged jet of river water by upwelling was discovered. It was shown that during this process jet rise and jet thickening took place, given that the speed increased and the height of bottom current also increased. The version of mathematical model of discovered currents system was suggested, being represented as a determined system, using semi-empirical expression for upwelling height, trajectory and thickness of a jet.
Show AbstractDynamics of internal transition layers in the initial-boundary value problem for the extended Kolmogorov-Petrovskii-Piskunov equation
Dynamics of internal transition layers in the initial-boundary value problem for the extended Kolmogorov-Petrovskii-Piskunov equation
A.A. Bykov, N.N. Nefedov, A.S. Sharlo
Drift of the internal transition layer is investigated for the pseudo-parabolic thira order equation in the heterogeneous medium in case of the contrast structure like solution. Method of the singular expansion of the decision into the series by powers of the small parameter is used. Seversl basic terms of the series for the velocity of the internal
Show AbstractEffect of resistive switching in polymer materials containing metal microparticles and nonvolatile memory based on this effect.
Effect of resistive switching in polymer materials containing metal microparticles and nonvolatile memory based on this effect.
M.S. Kotova, M.A. Dronov, I.A. Belogorokhov
In this paper effect of resistive switch for polymer materials was observed in polystyrene containing metal micro particles Al, Zn with metal concentration close to the percolation threshold. Stable – up to 106 and fast – less than 10 ns switches were obtained. Critical voltages for switching from non-conducting to conducting state for devices with contact distances less than 1 mm did not exceed 10 V. This phenomenon makes it possible to produce memory devices with assumable future down-scaling.
Show AbstractExperimental investigation spatial dynamics of fibrinolysis in-vitro in the presence of urokinase and streptokinase
Experimental investigation spatial dynamics of fibrinolysis in-vitro in the presence of urokinase and streptokinase
Zhalyalov Ansar Saijarovich, Panteleev Mikhail Alexandrovich
Was experimentally investigation spatial dynamics of fibrin clot lysis in vitro. The effect of plasminogen activators (streptokinase and urokinase) on growth and lysis of fibrin clot in a reaction-diffusive system. Discovered the phenomena that the addition of plasminogen activators in therapeutic concentrations in addition fibrinolysis system actuates coagulation system, and wave of fibrinolysis starts from place of coagulation activation.
Show AbstractThe quality factor of mixed radiation induced by bremsstrahlung
The quality factor of mixed radiation induced by bremsstrahlung
Belousov Alexandr V. Osipov Alexey S. Chernyaev Alexandr P.
In work the contribution of the heavy charged particles, formed as a result of photonuclear reactions, to the absorbed and equivalent dose created by bremsstrahlung in biological matter is investigated. The technique of an estimation of average qiality factor (QF) photoprotons is developed. The mathematical model is developed, allowing to estimate in terms of quality factor, biological action of the mixed radiation induced by bremsstrahlung. The developed model can be easily extended to other types of primary radiation.
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