Self-Adjointness of Generalized MIC-Kepler System

We have studied the self-adjointness of generalized MIC-Kepler Hamiltonian, obtained from the formally self-adjoint generalized MIC-Kepler Hamiltonian. We have shown that for \tilde l=0, the system admits a 1-parameter family of self-adjoint extensions and for \tilde l \neq 0 but \tilde l <{1/2}, it has also a 1-parameter family of self-adjoint extensions.Comment: 11 pages, Latex, no figur

Ultrabroad-bandwidth multifrequency Raman generation

We report on the modeling of transient stimulated rotational Raman scattering in H2 gas. We predict a multifrequency output, spanning a bandwidth greater than the pump frequency, that may be generated without any significant delay with respect to the pump pulses. The roles of dispersion and transiency are quantified

Seguridad y protección social en el contexto de la integración europea en Ucrania

The processes of modern integration of Ukraine with Europe are closely connected with changes not only in the system of national legislation in terms of its adaptation to the principles and norms of international and European law, but also with a radical revision of the basics of legal support in public life. One of the most important spheres of public life is the social sphere, which is closely related to issues of social security and social protection of citizens. From this point of view, Ukraine’s approach to European living standards directly implies the improvement of the system of state management of social protection of citizens. The aim of the article is to analyze the impact of European integration processes on the social protection system in Ukraine, study the current state of social security and protection in Ukraine, identify the main problems of social policy in the country, suggest ways to solve our problems. The purpose and objectives of this article, together with its object and subject matter, predetermined the research methodology used, which includes documentary review and critical analysis. The significance of the obtained results is the theoretical basis they form for further analysis of the socio-political situation in Ukraine and forecasting the prospects of modern social development.Los procesos de integración de Ucrania con Europa están estrechamente relacionados con cambios no solo en el sistema de legislación nacional en términos de su adaptación a los principios y normas del derecho internacional y europeo, sino también con una revisión radical de los fundamentos jurídicos en la vida pública. Una de las esferas más importantes de la vida pública es el ámbito social que está íntimamente relacionado con los temas de seguridad social y protección social de los ciudadanos, desde este punto de vista, el enfoque de Ucrania sobre el nivel de vida europeo implica directamente la mejora del sistema de gestión estatal de la protección social de los ciudadanos. El objetivo del artículo es analizar el impacto de los procesos de integración de Europa en el sistema de protección social en Ucrania, estudiar el estado actual de la seguridad social y la protección en Ucrania, identificar los principales problemas de la política social en el país, sugerir formas de resolver las problemáticas sociales. El propósito y los objetivos de este artículo, junto con su objeto y temática predeterminaron la metodología de investigación utilizada que incluye revisión documental y análisis crítico. La importancia de los resultados obtenidos cosntituyen la base teórica para un análisis más profundo de la situación sociopolítica en Ucrania sobre las perspectivas del desarrollo social moderno

LEGAL AND SOCIAL ASPECTS OF INFORMAL LABOUR FORMALISATION: PROSPECTS AND CHALLENGES

Informal labour has become one of the main ways of earning income and a reason for non-payment of taxes to the state budget. Governments and international organisations are making many efforts to study the phenomenon of informal labour and formulate proposals for further formalisation of informal labour to «come out of the shadows» of activities in various fields. The relevance of our study is due to the rapid spread of informal employment and informal labour in various spheres of society, which entails economic losses for each state and a lack of faith in the declared labour relations. The purpose of the study is to identify possible ways and prospects for formalising informal labour, to determine the legal aspects of formalising informal labour, to analyse the challenges to the social protection of workers in the course of such formalisation, and to improve the current labour legislation. The author formulated legal conclusions on the legal aspects of formalisation of informal labour, the ways of such formalisation and its prospects. In particular, conclusions on social challenges for all participants in the so-called informal labour relations were provided. Finally, proposals for improving the legislation on informal employment were formulated

Stimulated emission and lasing in Cu(In,Ga)Se2 thin films

Stimulated emission and lasing in Cu(In,Ga)Se 2 thin films have been demonstrated at a temperature of 20 K using excitation by a nanosecond pulsed N 2 laser with power densities in the range from 2 to 100 kW cm − 2 . Sharp narrowing of the photoluminescence band, superlinear dependence of its intensity on excitation laser power, as well as stabilization of the spectral position and of the full-width at half-maximum of the band were observed in the films at increasing excitation intensity. The stimulated emission threshold was determined to be 20 kW cm − 2 . A gain value of 94 cm − 1 has been estimated using the variable stripe length method. Several sharp laser modes near 1.13 eV were observed above the laser threshold of I thr ~ 50 kW cm −

Structure of information technology for detecting speech defects in speech signal

Описано запропоновану авторами інформаційну технологію виявлення дефектів мовлення, методи фонемної сегментації мовного сигналу, класи дефектів, що виявляються, а також способи виявлення цих дефектів. Надано проектно-системну документацію програмного пакета, в якому реалізовано описані алгоритми.Описана предложенная авторами информационная технология обнаружения дефектов речи, методы фонемной сегментации речевого сигнала, классы дефектов, а также способы выявления этих дефектов. Представлена проектно-системная документация программного пакета, в котором реализованы описанные алгоритмы.The purpose of this paper is to describe the methods and algorithms of information technology proposed by authors for speech defects detection. The task of speech defects detection contains the tasks of segmentation of the speech signal, phoneme classification, as well as comparing the possibly impaired speech with a properly spoken reference signal. Comparisons should be made both for the signal as a whole (detection of missed phonemes) and for each phoneme separately (detection of defective phonemes). The segmentation algorithm used in information technology is based on the assertion that, at interphonemic transitions, the signal undergoes significant changes on many scales at once and is characterized by an increase in wavelet detailing coefficients, while in stationary areas the wavelet coefficients are grouped near certain scales. Phoneme wise presentation of the signal makes it possible to identify defects related to the incorrect pronunciation of the phoneme present in the word - the case where the total number of phonemes in the word remains unchanged. It is also possible to detect complete loss of the phoneme or the appearance of extra phonemes. To map phonemes to references, we use a dynamic timeline transformation algorithm, the vector of parameters of which is the Euclidean distance between the Fourier decomposition bands. In order to determine the degree of proximity of the input to the reference, an additional limitation is proposed, according to which the distance from the input signal to the reference signal should be significantly different from the distances for other files. As a response threshold, 1/3 of the variance of distances between files was used. When the number of phonemes in a word does not match the reference, each phoneme of the reference is mapped to an input file, so that one of the input phonemes is matched, without violating the order of phonemes. If more than one non-identified section in a row is detected during segmentation, the sections are combined and compared to the base of the reference phonemes as one phoneme. If the base of the reference phonemes does not match the nearest result to the adjacent left or right phonemes, the segment of the speech is marked as defective. The described algorithms are implemented as part of information technology for assisting in the formulation of the pronunciation by providing the ability to independently assess the quality of the pronunciation

Study of porous monolithic sio2 prepeared by sol-gel method

For applications as catalyst supports in flow reactors, porous silica monoliths require a combination of connected pores of micron-scale and nm-scale pores. We have synthesised a range porous silica monoliths, characterised their nm-scale pores and measured their permeability coefficients k. It can be controlled by adjustment of the polymer/silane concentration ratio, whilst maintaining the specific surface area and nm-scale porosity approximately constant

Исследование удельной электропроводности короткозамкнутой обмотки ротора асинхронных двигателей статистическим методом планирования эксперимента

Рассматривается влияние температуры и химсостава алюминия при заливке, длины пакетов и суммарного поперечного сечения пазов роторов на удельную электропроводность алюминия короткозамкнутой обмотки роторов асинхронных двигателей. В качестве метода исследования выбран экспериментально-статистический. Составлен центральный композиционный ротатабельный униформплан второго порядка. Для реализации плана изготовлено 116 экспериментальных роторов на базе двигателей серий АО и АО2. Удельная электропроводность измерялась прибором типа ИЭ-1 на вентиляционных крыльях, короткозамыкающих кольцах и на извлеченных из роторов стержнях обмотки. Всего произведено 4292 замера. В результате статистической обработки экспериментальных данных получены уравнения регрессии в виде полиномов второго порядка отдельно для короткозамыкающих колец и стержней обмотки. Проведена проверка уравнений на адекватность по F-критерию Фишера и коэффициентов уравнений на значимость по критерию Стъюдента. Уравнения регрессии позволяют учесть технологические и конструктивно-технологические факторы при проектировании асинхронных двигателей, аналогичных исследованным, и повысить точность расчета их характеристик

Иммобилизация РАО в перовскитоподобную матрицу

Выпускная квалификационная работа с., рис., табл., источников, прил. Ключевые слова: перовскит, иммобилизация радиоактивных отходов, самораспространяющийся высокотемпературный синтез, матричные материалы Объектом исследования является иммобилизация радиоактивных отходов в матричный материал методом СВС на основе перовскита. Цель работы – получение химически устойчивой матрицы для иммобилизации актиноидной фракции радиоактивных отходов методом СВС В процессе выполнения магистерской диссертации отработана технология получения матричного материала методом СВС. В результате исследования были определены закономерности образования фаз состава матриц. Степень внедрения: организация технологического процесса иммобилизации актиноидной фракции радиоактивных отходов методом СВС Область применения: атFinal qualifying work with., Fig., Tab., Sources, adj. Keywords: perovskite, radioactive waste immobilization, self-propagating high-temperature synthesis, matrix materials The object of research is the immobilization of radioactive waste in the matrix material by the SHS-based perovskite. The purpose of work - to obtain a chemically stable matrix for the immobilization of actinide fraction of radioactive waste by SHS In carrying out the master's thesis the technology of producing the matrix material by SHS. The study of the formation of the composition of the matrix phase have been identified. Degree of implementation: the organization of the process of immobilization actinide fraction of radioactive waste by SHS Scope: the nuclear industry