Thermal Bogoliubov transformation in nuclear structure theory

Thermal Bogoliubov transformation is an essential ingredient of the thermo field dynamics -- the real time formalism in quantum field and many-body theories at finite temperatures developed by H. Umezawa and coworkers. The approach to study properties of hot nuclei which is based on the extension of the well-known Quasiparticle-Phonon Model to finite temperatures employing the TFD formalism is presented. A distinctive feature of the QPM-TFD combination is a possibility to go beyond the standard approximations like the thermal Hartree-Fock or the thermal RPA ones.Comment: 8 pages, Proceedings of the International Bogolyubov Conference "Problems of Theoretical and Mathematical Physics", August 23 -- 27, 2009, Dubna, Russi

Комп’ютерне моделювання характеристик одноелектронних транзисторів

Proposed methods of modeling of electrical and temperature characteristics of single-electrontransistor for providing information to system of computer-aided design Electronics Workbench.Analyzed dependence in current-voltage characteristics of nano-device trough values of temperature andoperating modeРазработаны методы моделирования электрических и температурных характеристик одноэлектронного транзистора для информационного обеспечения системы автоматизированного схемотехническогопроектирования Electronics Workbench. Проанализирована зависимость вольт-амперных характеристик наноприбора от влияния температуры и рабочего режимаРозроблено методи моделювання електричних та температурних характеристик одноелектронного транзистора для інформаційного забезпечення системи автоматизованого схемотехнічного проектування Electronics Workbench. Проаналізовано залежність вольт-амперних характеристик наноприладу від впливу температури таробочого режим

Current Profiles of Molecular Nanowires; DFT Green Function Representation

The Liouville-space Green function formalism is used to compute the current density profile across a single molecule attached to electrodes. Time ordering is maintained in real, physical, time, avoiding the use of artificial time loops and backward propagations. Closed expressions for molecular currents, which only require DFT calculations for the isolated molecule, are derived to fourth order in the molecule/electrode coupling.Comment: 21 page

The country's economic growth models and the potential for budgetary, monetary and private financing of gross domestic product growth

This article examines the financing of GDP growth within the framework of catch-up, evolutionary and dynamic models of economic development. Methods/statistical analysis: using the principles of the Solow model and the Cobb-Douglas function, an analysis of the nature of the models has been carried out, considering the processes of capital accumulation, the rate of growth of the workforce, and various aggregate factor productivities. With the help of historical logic and statistical evaluation, examples of countries relating to each of the models examined are reviewed. Based on the analysis, the main ways of financing economic growth are noted: both the state ones, due to budgetary and monetary policy measures, and private ones. It has been proven that with the transition from catch-up to an evolutionary or dynamic model, the role of the state as a centralizing force is diminishing. At the same time, the specificity of a dynamic model is due to the country's objective ability to be among the technological leaders, which is predetermined by the high values of current GDP, per capita GDP, and population size. Countries with an evolutionary model of development are constrained in their ability to maintain a comparable pace of development only within separate "growth points". The main result of the work is the assessment of Russia's potential from the viewpoint of one of the models considered, based on a comparative analysis of several capital indicators, as well as a logical analysis of data on the level of GDP and population with other countries. This makes it possible to make recommendations for financing the country's GDP growth in the medium to long term. Scope/Improvements: The findings can be used in the development of Russia's financial and economic strategy up to 2030.peer-reviewe

Morphological features of wild boar individuals of semifree content

The article reflects the results of the study of morphological features of wild boars of semi-free content on the basis of their comparison with the corresponding parameters of wild boar

Photovoltaic Response of Silicon Wafers Treated in the K2WO4-Na2WO4-WO3Melt

Texturing silicon wafers is one way to increase the performance of solar cells. This work is the first to report on the surface modification of Si wafers by processing in polytungstate melts. Scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction analysis (XRD), the Brunauer-Emmett-Teller (BET) method, and photoelectrochemical measurements were used to elucidate the effect of texturing conditions in the Na2WO4 - K2WO4 (1:1) melt containing 35 or 50 mol% WO3 at 973 K in air. As a result of cathodic treatment in the melt containing 50 mol% WO3 at the potential of -0.92 V (vs Pt) for 15 s, upright pyramids were formed on the Si surface. In addition, inverted pyramids appeared at the OTB/Si contact points. The photocurrent density of these samples was several times higher than that for the initial Si wafer or the Si wafer etched in 5 M NaOH solution at 353 K for 20 min. Mechanisms for the formation of upright and inverted pyramids were proposed. Unusual eight-faceted pyramids were formed on the Si surface during cathodic treatment in the melt containing 35 mol% WO3 at -1.19 V for 15 s, but the photocurrent density of such samples was low. © 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.This work is performed in the frame of the State Assignment number 075-03-2020-582/1 dated 18.02.2020 (the theme number 0836-2020-0037). This work has been (partly) done using facilities of the Shared Access Center "Composition of Compounds" (IHTE, UB RAS)

Способ оценки качества точечного сварного соединения

The method of spot weld quality assurance of assemblies of sheets of high-strength stainless steels is developed. The X-ray optical scheme of shooting of a welding point is described. The algorithm of definition of a depth of a cast core of a spot weld is offered.Разработан способ оценки качества точечного сварного соединения сборок листов высокопрочных нержавеющих сталей. Описана рентгенооптическая схема съемки сварной точки. Предложен алгоритм определения глубины залегания литого ядра сварной точки

Statistical analysis of gaz-3110 vehicles noise

This work presents the results of the statistical analysis of noise in several points of GAZ-3110 vehicles. There are also the dependences between the loudness of noise and speed of an engine or useful life of a car. It is difficult to confuse the noise of jet engine with reciprocating internal-combustion engine. Random factors also influence much the power level. Mechanism adjustment has its limits and so it can have different influence on its vibration and noise. Finally during the process of operation sliding surfaces do wear, screwed connections do loosen, other things happen and these lead to the changes in spectrum and level of noise. In this work we tried to evaluate the dispersion of GAZ-3110 vehicles noise levels according to the results of a coustic measurements in the immediate field of rondom acoustically active constructive assemblies. The range of noise loudness for the specific car model is defined at the level 20-25 dBA. The GAZ-3110 vehicles are characterized by the significant dispersion of noise level. The differences of noise level of individual cars are exceeding 20-25 dBA. vehicles noise considerably increases with the augmentation of useful life and rpm speed. The noisiest element of GAZ-3110 vehicles is internal combustion engine, then main gear even when first gear is operated

Автоматизоване керування світлодіодними системами штучного небосхилу

Considered the possibility of creating an experimental light environment (helioclimateron) for  the study of natural, artificial and compatible lighting in the composition of the interior and exterior of buildings. The determined light, electric and optical patterns of the formation of light fluxes in a hemispherical model of skyscraper. Significant economic and operation advantages of LED systems of light for artificial skyscraper have been proven. Proposed schemes of computer control by LED cells, which form the distribution of light and color.Рассмотрена возможность создания экспериментального световой среды (гелиоклиматрона) для исследования вариантов естественного, искусственного и совместного освещения при формировании композиции интерьера и экстерьера зданий. Определены световые, электрические и оптические закономерности формирования потоков света в полусферической модели небосвода. Доказаны существенные экономические и эксплуатационные преимущества светодиодных систем освещения для искусственного небосвода. Предложены схемы компьютерного управления светодиодными ячейками, которые формируют распределение света и цвета.Розглянуто можливість створення експериментального світлового середовища (геліокліматрона) для дослідження варіантів природного, штучного та сумісного освітлення при формуванні композиції інтер’єру та екстер’єру будівель. Визначено світлові, електричні та оптичні закономірності формування потоків світла в напівсферичній моделі небосхилу. Доведено суттєві економічні та експлуатаційні переваги світлодіодних систем освітлення для штучного небосхилу. Запропоновано схеми комп’ютерного керування світлодіодними комірками, які формують розподіл світла і кольору