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Search Results: 1 - 10 of 418257 matches for " S. V. Zhukov "
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The Development of Ion Nano-beams - A Review
S. Kalbitzer,V. A. Zhukov
Applied Physics Research , 2012, DOI: 10.5539/apr.v4n1p211
Abstract: With the advent of the super-tip ion source very favourable conditions for generating ion nano-beams have been provided. The basic physical principles for a super-tip-gas field ion source are described As a consequence of a very small source emittance of ? ~ 10-24 m2sr ultra-bright rare gas ion beams of about 1016 A/m2.sr can be produced. As a further consequence, very narrow probe sizes are obtainable, of dp< 1 nm, with spatial resolutions far below the classical limits of light-optics and even below the novel stimulated-emission-depletion microscopy [*STED (microscopy) = stimulated emission depletion (microscopy) Th. A. Klar, S. W. Hell, Opt.Lett. 24 (1999) 954-956]. Various ion-nanobeam applications in both materials modification, and analysis are envisaged.
Identification of single events in the HPGe detector: Comparison of various methods based on the analysis of simulated pulse shapes
A. M. Bakalyarov,A. Ya. Balysh,S. T. Belyaev,V. I. Lebedev,S. V. Zhukov
Physics , 2002,
Abstract: Various methods of identification of single events in the HPGe detector are compared on the basis of a program especially designed to simulate pulse shape in a semi-conductor germanium detector. Capabilities of three following methods are shown: (1) an application of the library of single pulse shapes, (2) the single-parameter method, and (3) a separation on the basis of artificial neural networks. The analysis was done in the context of an application of all above-mentioned techniques in the energy interval around the expected neutrino less double beta decay of Ge-76 in the Heidelberg-Moscow experiment.
Results of the experiment on investigation of Germanium-76 double beta decay. Experimental data of Heidelberg-Moscow collaboration November 1995 - August 2001
A. M. Bakalyarov,A. Ya. Balysh,S. T. Belyaev,V. I. Lebedev,S. V. Zhukov
Physics , 2003,
Abstract: On the termination of the Heidelberg-Moscow double-beta decay of Germanium-76 experi-ment, the analysis of the obtained data is presented. The value of the half-life for two-neutrino double beta decay (2b2n mode) and limitation of the half-life for neutrinoless dou-ble beta decay (2b0n mode) are given. The results were presented at NANP2003, Dubna, June, 24.
Electromagnetic Dipole Response as a Test of the $^{\bf 11}$Li g.s. Structure and the n-$^{\bf 9}$Li Interaction
B. V. Danilin,M. V. Zhukov,J. S. Vaagen,I. J. Thompson,J. M. Bang
Physics , 1993,
Abstract: The electric dipole response of the halo nucleus $^{11}$Li is calculated in a hyperspherical three-body formulation, and is studied as a function of the interaction employed for $n-^9$Li to reflect the Pauli principle. Strength concentrations at lower energies are found but no narrow resonances. Only one possible scenario of $^{11}$Li structure is in close correspondence with MSU and RIKEN experimental data.
Suppression of 2D superconductivity by the magnetic field: quantum corrections vs superconductor-insulator transition
V. F. Gantmakher,S. N. Ermolov,G. E. Tsydynzhapov,A. A. Zhukov,T. I. Baturina
Physics , 2003, DOI: 10.1134/1.1587177
Abstract: Magnetotransport of superconducting Nd_{2-x}Ce_xCuO_{4+y} (NdCeCuO) films is studied in the temperature interval 0.3-30 K. The microscopic theory of the quantum corrections to conductivity, both in the Cooper and in the diffusion channels, qualitatively describes the main features of the experiment including the negative magnetoresistance in the high field limit. Comparison with the model of the field-induced superconductor-insulator transition (SIT) is included and a crossover between these two theoretical approaches is discussed.
Dynamical Lamb Effect in a Tunable Superconducting Qubit-Cavity System
D. S. Shapiro,A. A. Zhukov,W. V. Pogosov,Yu. E. Lozovik
Physics , 2015, DOI: 10.1103/PhysRevA.91.063814
Abstract: A natural atom placed into a cavity with time-dependent parameters can be parametrically excited due to the interaction with the quantized photon mode. One of the channels of such a process is the dynamical Lamb effect, induced by a nonadiabatic modulation of atomic level Lamb shift. However, in experiments with natural atoms it is quite difficult to isolate this effect from other mechanisms of atom excitation. We point out that a transmission line cavity coupled with a superconducting qubit (artificial macroscopic atom) provides a unique platform for the observation of the dynamical Lamb effect. A key idea is to exploit a dynamically tunable qubit-resonator coupling, which was implemented quite recently. By varying nonadiabatically the coupling, it is possible to parametrically excite a qubit through a nonadiabatic modulation of the Lamb shift, even if the cavity was initially empty. A dynamics of such a coupled system is studied within the Rabi model with time-dependent coupling constant and beyond the rotating wave approximation. An efficient method to increase the effect through the periodic and nonadiabatic switching of a qubit-resonator coupling energy is proposed.
Practical Realization of the Quantum Cryptography Protocol Exploiting Polarization Encoding in the Qutrits
G. A. Maslennikov,A. A. Zhukov,M. V. Chekhova,S. P. Kulik
Physics , 2003, DOI: 10.1088/1464-4266/5/4/360
Abstract: We propose and discuss a specific scheme allowing to realize a Quantum Cryptography qutrit protocol. This protocol exploits the polarization properties of single frequency and single spatial mode biphotons.
Hole Conductivity in Heterogeneous DNA Fragments
O. A. Ponomarev,A. S. Shigaev,A. I. Zhukov,V. D. Lakhno
Physics , 2013,
Abstract: The characteristics of cation radical (hole) migration in heterogeneous DNA were investigated on the basis of Kubo formula, in which correlation functions were obtained from solutions of systems of Bogoliubov hierarchy. The cutting of Bogoliubov hierarchy was carried out by excepting correlations of the third and higher order. The obtained system of non-linear differential equations was investigated both analytically and numerically. The environment polarization, caused by interaction of holes with base pairs vibrations, was shown to play the key role in transport processes. The energy of the interaction can ten-fold exceed vibration energy. The transfer rate between adjacent DNA bases in one-dimensional case was shown to be almost independent of the nature and behavior of more distant pairs. The charge probability amplitude oscillates in the picosecond timescale. Nonetheless, the rates of hole transfer, obtained by averaging over these oscillations, turned out to be very close to the experimental data. The calculated dependence of the hole transfer rate between two guanine bases on the number of intervening adenine bases was also in good agreement with the experimental data. Besides, the temperature dependence of the transfer rate was investigated. Hopping mechanism was shown to make the main contribution to the hole transport process at 300 K.
The Modern Theoretical Bases of Forming of Efficiency of Production and Economic Activity of Enterprise Современные теоретические основы формирования эффективности производственно-хозяйственной деятельности предприятия
Zhukov Andrey V.
Business Inform , 2013,
Abstract: In the article the existent theoretical going is analyzed near determination of concept efficiency. Differentiating and elucidation of such categories as an effect, result, efficiency and criterion of efficiency is conducted. The complex of criteria of efficiency on directions of accordance of aims and necessities to the result and expenses was grounded. The logical and structural model of forming of efficiency of production and economic activity of enterprise is built including such constituents: efficiency of subsystems of activity of enterprise, efficiency of the use of resources, socially ecological efficiency. Determination of efficiency of production and economic activity of enterprise is offered as complex description of its development, which according to the criteria of effectiveness, reflects the level of achievement of aims of production and economic activity of enterprise an economy and optimality. В статье проанализированы существующие теоретические подходы к определению понятия эффективность. Проведено разграничение и разъяснение таких категорий как эффект, результат, эффективность и критерий эффективности. Обоснованно комплекс критериев эффективности по направлениям соответствия целей и потребностей к результату и затратам. Построена логико-структурная модель формирования эффективности производственно-хозяйственной деятельности предприятия за такими составляющими: эффективность подсистем производственно-хозяйственной деятельности предприятия, эффективность использования ресурсов, социально-экологическая эффективность. Предложено определение эффективности производственно-хозяйственной деятельности предприятия как комплексной характеристики ее развития, которая соответственно критериям результативности, экономичности и оптимальности отражает уровень достижения целей производственно-хозяйственной деятельности предприятия.
A new hypothesis of sunspot formation
V. I. Zhukov
Physics , 2003,
Abstract: The process of sunspot formation is considered with the account of heat effects. According to the Le Chatelier principle, a local overheating must precede to the cooling of solar surface in the places of sunspot formation. The sunspot dynamics is a process close to the surface nucleate-free boiling in a thin layer with formation of bubbles (or craters), so we focus on the analogy between these two processes. Solar spots and surface nucleate-free boiling in a thin layer have similarities in formation conditions, results of impact on the surface were they have been formed, periodicity, and their place in the hierarchy of self-organization in complex systems. The difference is in the working medium and method of channelling of extra energy from the overheated surface -for boiling process, the energy is forwarded to generation of vapor, and in sunspots the solar energy is consumed to formation of a strong magnetic field. This analogy explains the problem of a steady brightness (temperature) of a spot that is independent of the spot size and other characteristics.
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