387 research outputs found

    The phenomenon of the home: Metaphysics of the innermost (as illustrated by the modern Russian culture)

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    The relevance of the problem under study is based on the influence of the expanding globalization processes that affect the view of life of a modern man: the internal balance is lost due to feeling of chaos, rhythm of life and constant changes. In these conditions there is a tendency to de-humanize the living environment, depersonalization of living space and desacralization of human dwelling which leads to re-thinking of the Home that ensures human existence in the world. The purpose of the article is to state the necessity of new understanding of the Home as the phenomenon of culture which would confront the absolute priority of the rational, pragmatic and utilitarian through the notion of “the innermost”, through studying the transformation of the innermost within the historical context and through revealing the dialectics of the innermost and the explicit in living space of the modern culture. The lead method for studying this problem is the interdisciplinary approach that provides the possibility of comprehensive consideration of the results of philosophical, cultural, architectural and other studies. The article reveals the essence and the main philosophical-cultural characteristics of the Home and the essence of the innermost as a special super-value, specifies the traditional image of the innermost in living space related to the Home as the centre of existence and reveals the attributes of transformation of the innermost in the Home resulting from the processes which are characteristic of the modern age. The materials of the article can be useful for developing the scientific-methodological support of general and special courses, for conducting lessons in philosophical-cultural disciplines and for usage for designing and modeling the living environment. © 2016 Shupletsova et al

    Sterile neutrino and dark matter

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    We consider the equation that describes the dynamics of the sterile neutrino density in primeval plasma. The analysis of this equation results in the 5% contribution of the sterile neutrino with mixing parameters Δm142=7.3eV2\Delta m^2_{14} = 7.3\text{eV}^2 and sin22θ14=0.33\sin^2 2\theta_{14} = 0.33 to the energy density of the Universe. The considered parameters of the sterile neutrino correspond to the warm dark matter.Comment: 7 pages, 11 figure

    Dipole nanolaser

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    A "dipole" laser is proposed consisting of a nanoparticle and a two-level system with population inversion. If the threshold conditions are fulfilled, the dipole interaction between the two-level system and the nanoparticle leads to coherent oscillations in the polarization of the particles, even in the absence of an external electromagnetic field. The emitted radiation has a dipolar distribution. It does not need an optical cavity, and has a very small volume, 0.1 mu m(3), which can be important for applications in microelectronics. Estimates of the threshold conditions are carried out for a dipole laser composed of a quantum dot and a silver nanoparticle

    Steps in the Negative-Differential-Conductivity Regime of a Superconductor

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    Current-voltage characteristics were measured in the mixed state of Y1Ba2Cu3O(7-delta) superconducting films in the regime where flux flow becomes unstable and the differential conductivity dj/dE becomes negative. Under conditions where its negative slope is steep, the j(E) curve develops a pronounced staircase like pattern. We attribute the steps in j(E) to the formation of a dynamical phase consisting of the succesive nucleation of quantized distortions in the local vortex velocity and flux distribution within the moving flux matter.Comment: 5 pages, 3 figure

    Broadband SNAIL parametric amplifier with microstrip impedance transformer

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    Josephson parametric amplifiers have emerged as a promising platform for quantum information processing and squeezed quantum states generation. Travelling wave and impedance-matched parametric amplifiers provide broad bandwidth for high-fidelity single-shot readout of multiple qubit superconducting circuits. Here, we present a quantum-limited 3-wave-mixing parametric amplifier based on superconducting nonlinear asymmetric inductive elements (SNAILs), whose useful bandwidth is enhanced with an on-chip two-section impedance-matching circuit based on microstrip transmission lines. The amplifier dynamic range is increased using an array of sixty-seven SNAILs with 268 Josephson junctions, forming a nonlinear quarter-wave resonator. Operating in a current-pumped mode, we experimentally demonstrate an average gain of 17dB17 dB across 300MHz300 MHz bandwidth, along with an average saturation power of 100dBm- 100 dBm, which can go as high as 97dBm- 97 dBm with quantum-limited noise performance. Moreover, the amplifier can be fabricated using a simple technology with just a one e-beam lithography step. Its central frequency is tuned over a several hundred megahertz, which in turn broadens the effective operational bandwidth to around 1.5GHz1.5 GHz.Comment: 7 pages, 3 figure

    Investigation of the kinetics of sulphuric acid leaching of zinc from calamine

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    This article aims at the research of kinetics of the sulphuric acid leaching of zinc from calamine (hemimorphite) of Shaimerden deposits. The ratio of zinc extraction from calamine to water-soluble zinc sulphate was determined at various leaching durations and its temperatures. The concentration of the sulfuric acid solution, the flow rate of this solution and the size of the calamine particles, selected in the course of this work for leaching zinc from this mineral with the specified solution, made it possible to establish the value of the “apparent” activation energy of the reaction of calamine with sulfuric acid, amounting to 3,075 kJ / mol

    Observation of the parallel-magnetic-field-induced superconductor-insulator transition in thin amorphous InO films

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    We study the response of a thin superconducting amorphous InO film with variable oxygen content to a parallel magnetic field. A field-induced superconductor-insulator transition (SIT) is observed that is very similar to the one in normal magnetic fields. As the boson-vortex duality, which is the key-stone of the theory of the field-induced SIT, is obviously absent in the parallel configuration, we have to draw conclusion about the theory insufficiency.Comment: 3 pages, 4 figure

    Defect-unbinding and the Bose-glass transition in layered superconductors

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    The low-field Bose-glass transition temperature in heavy-ion irradiated Bi_2Sr_2CaCu_2O_8+d increases progressively with increasing density of irradiation-induced columnar defects, but saturates for densities in excess of 1.5 x10^9 cm^-2. The maximum Bose-glass temperature corresponds to that above which diffusion of two-dimensional pancake vortices between different vortex lines becomes possible, and above which the ``line-like'' character of vortices is lost. We develop a description of the Bose-glass line that is in excellent quantitative agreement with the experimental line obtained for widely different values of track density and material parameters.Comment: 4 pages, 4 figures, submitted to Phys. Rev. Let
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