A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having 3×3 periodicity was found to exhibit a giant rashba-type spin splitting of metallic surface-state ba...
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A one-atom-layer compound made of one monolayer of Tl and one-third monolayer of Pb on a Si(111) surface having 3×3 periodicity was found to exhibit a giant rashba-type spin splitting of metallic surface-state bands together with two-dimensional superconducting transport properties. Temperature-dependent angle-resolved photoelectron spectroscopy revealed an enhanced electron-phonon coupling for one of the spin-split bands. In situ micro-four-point-probe conductivity measurements with and without magnetic field demonstrated that the (Tl, Pb)/Si(111) system transformed into the superconducting state at 2.25 K, followed by the Berezinskii-Kosterlitz-Thouless mechanism. The 2D Tl-Pb compound on Si(111) is believed to be the prototypical object for prospective studies of intriguing properties of the superconducting 2D system with lifted spin degeneracy, bearing in mind that its composition, atomic and electron band structures, and spin texture are already well established.
The various formulations of the problem of technical diagnosis are possible when coming to the creation and use of analog circuits. One approach allows deviation parameters sufficiently large set of parameters of the ...
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ISBN:
(纸本)9781138028128
The various formulations of the problem of technical diagnosis are possible when coming to the creation and use of analog circuits. One approach allows deviation parameters sufficiently large set of parameters of the elements. A way of testing experiments organization with analog circuit is considered. It means that the different test modes of the target circuit are the connection passive elements with frequency depended parameters and the source frequency vary. The theory of the approach is considered. An example is given.
In this work the synthesis method of system of automatic correction of underwater vehicle linear displacements is described. Arbitrary non-zero values of underwater vehicles angles of roll and trim arise under the inf...
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In this work the synthesis method of system of automatic correction of underwater vehicle linear displacements is described. Arbitrary non-zero values of underwater vehicles angles of roll and trim arise under the influence of external forces and torques. Proposed system automatically changes corresponding thrusters thrusts depending on current values of said angles. It provides high-accuracy underwater vehicle moving in given direction. Besides, developed system allows to eliminate underwater vehicle displacements from given spatial trajectory which caused by vehicle asymmetry and different values of added mass of fluid and viscous friction coefficients when underwater vehicle moves along different degrees of freedom. As result of using of proposed correction, operator can control desired torque vector of underwater vehicle without considering of appearance of arbitrary angles of roll and trim. Results of performed numerical simulations have confirmed high efficiency of functioning of synthesized system.
In this work method of synthesis of system of automatic correction of program trajectory of motion of multilink manipulator installed on underwater vehicle was discussed. Developed system allows solving problem of fas...
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In this work method of synthesis of system of automatic correction of program trajectory of motion of multilink manipulator installed on underwater vehicle was discussed. Developed system allows solving problem of fast and high quality performing of underwater manipulation operations with less operator fatigue at underwater vehicle hang mode near object of work even at unintended displacements of underwater vehicle from initial position. Using of synthesized system is assumed with well-known systems of automatic stabilization of underwater vehicle in desirable point of space. Proposed automatic correction provides additional movements of multilink manipulator effector. This correction is based on information about actual angular and linear displacements of underwater vehicle from initial position and information about constantly varied configuration of multilink manipulator. Results of performed mathematical modeling have confirmed high efficiency of synthesized system.
Holographic gratings formation in polymethylmethacrylate doped with boron difluoride anthraceneacetonates was studied. It was shown, that the time dependence of refractive index (RI) modulation amplitude for recorded ...
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Holographic gratings formation in polymethylmethacrylate doped with boron difluoride anthraceneacetonates was studied. It was shown, that the time dependence of refractive index (RI) modulation amplitude for recorded holographic gratings demonstrates M-shaped character, with the first (up to 0.5 × 10 −4 RI units) and the second (up to 0.2 × 10 −4 RI units) maxima of this dependence being caused by photodimerizability and postexposure diffusion of photoactive additive molecules. It was found that the material's resolution determined by competition of diffusion and photochemical processes for recorded gratings is about 1000 lines/mm. However, due to diffusion this value raises with time after the recording process end reaching 2500 lines/mm. It was shown that the optimal exposure time is inversely proportional to the grating spatial frequency and can be reduced by more than an order of magnitude by material heating from 25 °C to 75 °C.
The report presents and analyzes the experimental results luminescence study alumina and theoretical results showing that the dielectric nanoparticles have the exciton states of electrons with binding energy of severa...
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The report presents and analyzes the experimental results luminescence study alumina and theoretical results showing that the dielectric nanoparticles have the exciton states of electrons with binding energy of several electron volts, which are excited by the weak optical laser radiation. Such materials with a wide spectrum of exciton states are important for creation: exciton lasers and optical emitters; receiving and emitting optical nano-antennas; control and processing information and signals; generation low-power optical solitons; optical computers etc.
In this report we present the experimental study of imaging photoplethysmography in the area of the palm and wrist of fifty-six healthy subjects. We found that the amplitude of the PPG waveform is unevenly distributed...
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In this report we present the experimental study of imaging photoplethysmography in the area of the palm and wrist of fifty-six healthy subjects. We found that the amplitude of the PPG waveform is unevenly distributed over the studied area forming the hot spots with the elevated amplitude. There is clear tendency of the amplitude increasing in the hottest spots with the age of the subject. These observations support the recently proposed model of photoplethysmography in which pulse oscillations of the arterial transmural pressure deform the connective-tissue components of the dermis resulting in periodical changes of both the light scattering and absorption.
The problem of improvement of existing approaches for evaluation of inferential models used in the advanced process control systems is considered. The method of finding the identifiability index limit, based on the ph...
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Within shallow water equations, the numerical simulation problem of the generation and propagation of shallow waves caused by a running bottom rupture is considered. The rupture is a trench with a width increasing wit...
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