Indexes Objectively Reflecting Performance Evaluation of Technical Rubber Goods

AbstractIn order to choose a characteristic index which objectively reflects performance evaluation of technical rubber goods, accelerated thermal-oxidative ageing of rubbers was carried out. It has been demonstrated that as the index accountable for maintaining workability the rate of set at compressing or tension relaxing at pressing of technical rubber goods in a statically deformed state is usually taken. Besides, breaking elongation or tensile strength of technical rubber goods in a free state can be taken as an index, as well. It has been educed that the most sensitive index which reflexes the structural changes in the rubber of the rubber-cord casing (RCC) during the process of ageing is breaking elongation, the value of which is drastically dropping in the initial period of the thermal ageing and monotonously changing thereafter

Политические аспекты муниципального управления

This article provides an overview of the Municipal management in the public administration of a democratic state is the basis of democracy. At the present stage, it is necessary to consider the optimization of interaction of state power and local authorities of local government. This interaction should be effective use of material and financial resources at all levels of the financial system of the state to meet the needs of the local population with his active participation and direct control over the activities of the authorities.Муниципальное управление в системе государственного управления демократического государства является основой народовластия. На современном этапе необходимо рассматривать вопрос оптимизации взаимодействия государственной власти на местах и органов власти местного самоуправления. Результатом такого взаимодействия должно быть эффективное использование материальных и финансовых ресурсов всех уровней финансовой системы государства для удовлетворения потребностей местного населения при его активном участии и непосредственном контроле деятельности органов власти

РОЛЬ КАДРОВОГО МЕНЕДЖМЕНТА В ПОВЫШЕНИИ ЭФФЕКТИВНОСТИ ОРГАНИЗАЦИИ

This article provides an overview of the influence of human resource management in large organizations and industries, the analysis of the role of human resource management in the organization, an overview of its major mechanisms of functioning in an emerging market in the introduction of innovative technologies to improve the efficiency of production. Consideration of man and human relations.Данная статья представляет обзор влияния кадрового менеджмента в крупных организациях и производствах, анализ роли кадрового менеджмента в организации, обзор его ведущих механизмов функционирования в современной экономике, в условиях внедрения инновационных технологий, с целью повышения эффективности производства. Рассмотрение человека и человеческих отношений как важнейшего фактора производства

Современные неинвазивные технологиивизуализации в дерматологии

The authors present a review of up-to-date non-invasive visualization methods used in diagnostics of diseases of skin and its appendages. They describe physical principles forming the basis for non-invasive visualization methods such as dermatoscopy, confocal laser scanning microscopy, optical video monitoring, optical topometry, optical coherent tomography, ultrasound scanning, 3D-modeling. They also describe the potential of practical application of these diagnostics methods at the current stage of their development. The authors have demonstrated that it is possible to reduce the clinicians need in biopsy diagnostics due to the high information value of non-invasive visual diagnostics methods.Представлен обзор современных неинвазивных методов визуализации, используемых в диагностике заболеваний кожи и ее придатков. Рассмотрены физические принципы, лежащие в основе таких неинвазивных методов визуализации, как дерматоскопия, конфокальная лазерная сканирующая микроскопия, оптический видеомониторинг, оптическия топометрия, оптическая когерентная томография, ультразвуковое сканирование, 3D-моделирование. Также описаны возможности практического применения указанных диагностических методов на современном этапе их развития. Показано, что благодаря высокой информативности неинвазивных визуальных методов диагностики возможно снижение потребности клиницистов в проведении диагностических биопсий

Thermophoresis as persistent random walk

In a simple model of a continuous random walk a particle moves in one dimension with the velocity fluctuating between V and -V. If V is associated with the thermal velocity of a Brownian particle and allowed to be position dependent, the model accounts readily for the particle's drift along the temperature gradient and recovers basic results of the conventional thermophoresis theory.Comment: 4 page

Enhancement of fusion rates due to quantum effects in the particles momentum distribution in nonideal media

This study concerns a situation when measurements of the nonresonant cross-section of nuclear reactions appear highly dependent on the environment in which the particles interact. An appealing example discussed in the paper is the interaction of a deuteron beam with a target of deuterated metal Ta. In these experiments, the reaction cross section for d(d,p)t was shown to be orders of magnitude greater than what the conventional model predicts for the low-energy particles. In this paper we take into account the influence of quantum effects due to the Heisenberg uncertainty principle for particles in a non-ideal medium elastically interacting with the medium particles. In order to calculate the nuclear reaction rate in the non-ideal environment we apply both the Monte Carlo technique and approximate analytical calculation of the Feynman diagram using nonrelativistic kinetic Green's functions in the medium which correspond to the generalized energy and momentum distribution functions of interacting particles. We show a possibility to reduce the 12-fold integral corresponding to this diagram to a fivefold integral. This can significantly speed up the computation and control accuracy. Our calculations show that quantum effects significantly influence reaction rates such as p +7Be, 3He +4He, p +7Li, and 12C +12C. The new reaction rates may be much higher than the classical ones for the interior of the Sun and supernova stars. The possibility to observe the theoretical predictions under laboratory conditions is discussed

Behavior of the Ti-Zr-Ni thin film containing quasicrystalline and approximant phases under radiative-thermal action in transition modes

X-ray diffraction and SEM microscopy were used to study the structural and phase changes in a thin film obtained by magnetron sputtering of a Ti52Zr30Ni18 target (at.%) on a steel substrate under the radiation-thermal influence of pulsed hydrogen plasma on an QSPA Kh-50 accelerator. A technique has been worked out for the formation of the quasicrystalline and crystal-approximant phases as a result of high-speed quenching using pulsed action with a heat load of 0.6 MJ/m². The changes in the contents of these phases as well as in their structure and substructure parameters were studied during isothermal vacuum annealing at a temperature of 550 ℃ and also as a result of irradiation with 5 plasma pulses in the range of heat load from 0.1 to 0.4 MJ/m². The quasicrystalline phase was found to be resistant to irradiation with hydrogen plasma.Методами рентгенівської дифракції та СЄМ вивчені структурні і фазові зміни в тонкій плівці, отриманої магнетронним розпиленням мішені складу Ti52Zr30Ni18 (ат.%) на підкладці зі сталі, при радіаційнотермічному впливі імпульсної водневої плазми на прискорювачі КСПП Х-50. Відпрацьована методика формування квазікристалічної фази і фази кристала-апроксиманта в результаті швидкісного загартування за допомогою імпульсного впливу з тепловим навантаженням 0,6 MДж/м². Вивчено зміну параметрів структури і субструктури, а також вмісту зазначених фаз при ізотермічному вакуумному відпалі при температурі 550 ℃, а також в результаті опромінення 5 імпульсами плазми в інтервалі теплового навантаження від 0,1 до 0,4 МДж/м². Квазікристалічна фаза виявилася стійкою до опромінення водневою плазмою.Методами рентгеновской дифракции и СЭМ изучены структурные и фазовые изменения в тонкой пленке, полученной магнетронным распылением мишени состава Ti52Zr30Ni18 (ат.%) на подложке из стали, при радиационно-термическом воздействии импульсной водородной плазмы на ускорителе КСПУ Х-50. Отработана методика формирования квазикристаллической фазы и фазы кристалла-аппроксиманта в результате скоростной закалки с помощью импульсного воздействия с тепловой нагрузкой 0,6 MДж/м². Изучены изменение параметров структуры и субструктуры, а также содержания указанных фаз при изотермическом вакуумном отжиге при температуре 550 ℃, а также в результате облучения 5 импульсами плазмы в интервале тепловой нагрузки 0,1…0,4 МДж/м². Квазикристаллическая фаза оказалась устойчивой к облучению водородной плазмой

Spectral functions, Fermi surface and pseudogap in the t-J model

Spectral functions within the generalized t-J model as relevant to cuprates are analyzed using the method of equations of motion for projected fermion operators. In the evaluation of the self energy the decoupling of spin and single-particle fluctuations is performed. It is shown that in an undoped antiferromagnet (AFM) the method reproduces the selfconsistent Born approximation. For finite doping with short range AFM order the approximation evolves into a paramagnon contribution which retains large incoherent contribution in the hole part of the spectral function as well as the hole-pocket-like Fermi surface at low doping. On the other hand, the contribution of (longitudinal) spin fluctuations, with the coupling mostly determined predominantly by J and next-neighbor hopping t', is essential for the emergence of the pseudogap. The latter shows at low doping in the effective truncation of the large Fermi surface, reduced electron density of states and at the same time quasiparticle density of states at the Fermi level.Comment: RevTex, 13 pages, 11 figures (5 color

Phase Separation of Rigid-Rod Suspensions in Shear Flow

We analyze the behavior of a suspension of rigid rod-like particles in shear flow using a modified version of the Doi model, and construct diagrams for phase coexistence under conditions of constant imposed stress and constant imposed strain rate, among paranematic, flow-aligning nematic, and log-rolling nematic states. We calculate the effective constitutive relations that would be measured through the regime of phase separation into shear bands. We calculate phase coexistence by examining the stability of interfacial steady states and find a wide range of possible ``phase'' behaviors.Comment: 23 pages 19 figures, revised version to be published in Physical Review

Spin stiffness and quantum fluctuations in C-type and A-type antiferromagnets

We present a systematic study of quantum fluctuations in the C-type and A-type antiferromagnetic (AF) phases in cubic lattices and in bilayer systems. Using the linear spin-wave theory, we show that the spin stiffness and the quantum corrections to the order parameter and energy obtained for C-AF and A-AF phases decrease with the increasing number of ferromagnetic bonds. Therefore, the quantum spin effects in LaMnO_3 and in LaVO_3 are rather small, suggesting the magnetic moments of 3.91 and 1.89 Bohr's magneton, respectively. They cannot explain the strong reduction of the magnetic order parameter observed in cubic vanadates.Comment: 6 pages, 4 figure