Reduction of the Vibrations Caused by Transport to the General Post-Office of Moscow

After the completion of base reinforcement with cast-in-place piles, instrumental analysis of foundation vibration parameters was made on the basis of the vibration survey results. The analysis showed a considerable decrease in the level of vibrations caused by transport

La2CuO4 as a Promising Oxygen Carrier for CLOU Process

The orthorhombic Ruddlesden-Popper phase La2CuO4±δ with the Cmce space group was obtained by a solid-state reaction route. Thermochemical data were calculated for the reaction of lanthanum cuprate formation Thermogravimetric measurements show the oxygen content is close to stoichiometric. Cyclic CLOU experiment was carried out to determine a specific oxygen capacity (ΔW0 exceeding 3.9%), as well as oxygen nonstoichiometry (δ) of La2CuO4±δ. The combustion rate of methane at 950 °C in the CLOU cycle about 0.5 1/min for one mole of lanthanum cuprate was achieved. © 2020 American Institute of Physics Inc.. All rights reserved.The authors appreciate the support of this work by the Russian Science Foundation under grant N 19-79-10147

Influence of RARα gene on MDR1 expression and P-glycoprotein function in human leukemic cells

BACKGROUND: Multidrug resistance (MDR) phenotype of malignant cells is the major problem in the chemotherapy of neoplasia. The treatment of leukemia with retinoids is aimed on the induction of leukemic cells differentiation. However the interconnections between retinoid regulated differentiation of leukemic cells and regulation of MDR remains unclear. METHODS: Four lines of cultured leukemic cells of diverse types of differentiation were infected with RARα gene and stable transfectants were isolated. We investigated the differentiation of these cells as well as the expression of RARα and MDR1 genes and P-glycoprotein (Pgp, MDR protein) functional activity in these cells. RESULTS: All RARα transfected sublines demonstrated the increase in the quantity of RARα mRNA. All these sublines became more differentiated. Intrinsic activity of MDR1 gene (but not Pgp functional activity) was increased in one of the transfectants. All-trans-retinoic acid (ATRA) induced Pgp activity in two of three infectants to a larger extent than in parental cells. CONCLUSION: The data show that RARα regulates MDR1/ Pgp activity in human leukemic cells, in the first place, Pgp activity induced by ATRA. These results show that RARα overexpression in leukemic cells could result in MDR

Application of Numerical Methods in Solving Practical Problems of Electrodynamics

Цель работы – разработка программы для численного моделирования характеристик зеркальных антенн. Программа позволяет по заданным пользователем данным (тип антенны и облучателя, рабочая частота, тип поляризации, размеры антенной системы) построить эскиз облучателя и антенной системы, рассчитать диаграммы направленности облучателя и антенны в прямоугольной, полярной или сферической системах координат; рассчитать распределение тока в апертуре. Точность расчетов подтверждена путем сравнения полученных в программе результатов с характеристиками существующих антенн.The purpose of the work is to develop a program for numerical simulation of the reflector antennas. The program allows using the data specified by the user (type of antenna and feed and its dimensions, frequency, polarization) to image a sketch of the antenna system, calculate the radiation patterns of the feed and antenna in rectangular, polar or spherical systems coordinates; calculate the current distribution in the aperture. The accuracy of the calculations was confirmed by comparing the results obtained in the program with the characteristics of the existing antennas

A Program for the Automated Design of Reflector Antennas

Цель работы – разработка программы для автоматизированного проектирования зеркальных антенн. Для расчета облучателей антенн используется метод моментов, встроенный в функционал Matlab, для расчета зеркальной антенны используется апертурный метод. Созданная программа по заданным пользователем данным строит эскиз облучателя и антенной системы, рассчитывает диаграммы направленности облучателя и антенны, распределение тока в апертуре антенны. Результаты расчетов проверены сравнением с характеристиками существующих антенн и достаточно точны.The purpose of the work is to develop a program for the automated design of reflector antennas. The method of moments is used to calculate of the exciter radiation pattern, with using of Matlab Antenna Toolbox. The antenna characteristics is calculated using aperture distribution method. The designed program calculates the radiation patterns of exciter and antenna, and the current distribution in the antenna aperture. The calculation results have been verified by comparison with the characteristics of existing antennas and are quite accurate

Tracing magnetism and pairing in FeTe-based systems

In order to examine the interplay between magnetism and superconductivity, we monitor the non- superconducting chalcogenide FeTe and follow its transitions under insertion of oxygen, doping with Se and vacancies of Fe using spin-polarized band structure methods (LSDA with GGA) starting from the collinear and bicollinear magnetic arrangements. We use a supercell of Fe8Te8 as our starting point so that it can capture local changes in magnetic moments. The calculated values of magnetic moments agree well with available experimental data while oxygen insertions lead to significant changes in the bicollinear or collinear magnetic moments. The total energies of these systems indicate that the collinear-derived structure is the more favorable one prior to a possible superconducting transition. Using a 8-site Betts-cluster-based lattice and the Hubbard model, we show why this structure favors electron or hole pairing and provides clues to a common understanding of charge and spin pairing in the cuprates, pnictides and chalcogenides

Novel method of silicon synthesis by CVD

Silicon fibers were synthesized by a novel CVD method including in the interaction of aluminum monofluoride with silicon oxide, the final product containing nanofibers in an amount of 15 wt. %. The possibility of selective reduction of silicon oxide from the chamotte refractory plate was also demonstrated. Si was characterized by SEM and XRD. Thermodynamics and mechanism of silicon fiber formation were also considered. © 2019 Author(s)

Interaction between UN and CdCl2 in molten LiCl-KCl eutectic. I. Experiment at 773 K

The interaction between UN and CdCl2 in the LiCl-KCl molten eutectic was studied at 773 K. The reaction was controlled by sampling the melt, as well as by analysis of the resulting precipitate. The process was shown to proceed according to several parallel reactions. The summary reaction was determined to have two stages: a fast one and a slow one. The 19–53% UN → UCl3 conversion was obtained for the molar ratio of CdCl2/UN = 1.22–14.9. The rest of UN converts into the precipitate of complex composition (UNCl + U2N3 + U4N7 + UN2). The increase in the CdCl2/UN molar ratio from 1.22 to 14.9 resulted in the decrease in duration of the first “fast” stage of the process from 18 h to 1 h. © 201

Two-photon Lithography for 3D Magnetic Nanostructure Fabrication

Ferromagnetic materials have been utilised as recording media within data storage devices for many decades. Confinement of the material to a two dimensional plane is a significant bottleneck in achieving ultra-high recording densities and this has led to the proposition of three dimensional (3D) racetrack memories that utilise domain wall propagation along nanowires. However, the fabrication of 3D magnetic nanostructures of complex geometry is highly challenging and not easily achievable with standard lithography techniques. Here, by using a combination of two-photon lithography and electrochemical deposition, we show a new approach to construct 3D magnetic nanostructures of complex geometry. The magnetic properties are found to be intimately related to the 3D geometry of the structure and magnetic imaging experiments provide evidence of domain wall pinning at a 3D nanostructured junction

Another positivity proof and gravitational energy localizations

Two locally positive expressions for the gravitational Hamiltonian, one using 4-spinors the other special orthonormal frames, are reviewed. A new quadratic 3-spinor-curvature identity is used to obtain another positive expression for the Hamiltonian and thereby a localization of gravitational energy and positive energy proof. These new results provide a link between the other two methods. Localization and prospects for quasi-localization are discussed.Comment: 14 pages REVTe