Gaussian modeling and Schmidt modes of SPDS biphoton states

A double-Gaussian model and the Schmidt modes are found for the biphoton wave function characterizing spontaneous parametric down-conversion with the degenerate collinear phase-matching of the type I and with a pulsed pump. The obtained results are valid for all durations of the pump pulses, short, long and intermediately long

Structural Behaviour and Charge-Compensation Mechanism in Li2Fe1−xCoxSeO Solid Solutions during Reversible Delithiation

The constantly growing demand for renewable electrical energy keeps the continuation of battery-related research imperative. In spite of significant progress made in the development of Na- and K-ion systems, Li-ion batteries (LIBs) still prevail in the fields of portative devices and electric or hybrid vehicles. Since the amount of lithium on our planet is significantly limited, studies dedicated to the search for and development of novel materials, which would make LIBs more efficient in terms of their specific characteristics and life lengths, are necessary. Investigations of less industry-related systems are also important, as they provide general knowledge which helps in understanding directions and strategies for the improvement of applied materials. The current paper represents a comprehensive study of cubic Li2Fe1−xCoxSeO compounds with an anti-perovskite structure. These solid solutions demonstrate both cationic and anionic electrochemical activity in lithium cells while being applied as cathodes. Cobalt cations remain inactive; however, their amount in the structure defines if the Se0/Se2− or Fe3+/Fe2+ redox couple dominates the charge compensation mechanism upon (de)lithiation. Apart from that, cobalt affects the structural stability of the materials during cycling. These effects were evaluated by means of operando XRD and XAS techniques. The outcomes can be useful for both fundamental and practice-relevant research

The functions of examples in the case category description : in the Spanish grammars of the Golden age

The article analyzes examples as an integral part of a grammar. The functions of examples in the case category description in the Spanish grammars of the Golden Age are under consideration. It is pointed out that the functions of the examples in the case category description differed greatly from those in the description of other grammatical categoriesyesBelgorod State Universit

Estimation of the total inelasticity coefficient in interaction of greater than or equal to 20 TeV hadrons with lead

Experimental data on the interaction mean free path of hadrons with energy E 20 TeV in lead obtained with multilayer X-ray emulsion chambers(XEC) are compared with results of simulation of nuclear-electromagnetic cascades in lead chamber. It is shown that, to explain experimental data, the value of the inelasticity coefficients, K .8 should be assumed

O papel do património científico e pedagógico de G. Kamay na formação do interesse dos estudantes em química

The article presents the review of the use of scientific and pedagogical heritage of Gilm Khairevich Kamay (the representative of famous Kazan Chemistry School, Doctor of Chemical Sciences, Professor), for the development of schoolchildren interest in the study of chemistry. The urgency of this problem is determined by the need to use effective pedagogical and technological methods for activation the cognitive interest of students in chemistry, for better digestion of knowledge. The importance of this task is intensified as a result of the emerging contradictions between the increased theorization of school chemistry course, and the lack of close connection of the studied material with real life. The teacher has to use methodical methods for the formation of students' interest in chemistry, by means of realization the indispensible connection between learning and life. Information on the scientific and pedagogical activity of famous scientists, as the most important personal examples, should contribute to the growing interest of students in modern chemical disciplineEl artículo presenta la revisión del uso del patrimonio científico y pedagógico de Gilm Khairevich Kamay (el representante de la famosa Escuela de Química de Kazan, Doctor en Ciencias Químicas, Profesor), para el desarrollo del interés de los escolares en el estudio de la química. La urgencia de este problema está determinada por la necesidad de utilizar métodos pedagógicos y tecnológicos efectivos para activar el interés cognitivo de los estudiantes en química, para una mejor digestión del conocimiento. La importancia de esta tarea se intensifica como resultado de las contradicciones emergentes entre la mayor teorización del curso de química escolar y la falta de una estrecha conexión del material estudiado con la vida real. El docente debe utilizar métodos metódicos para la formación del interés de los estudiantes en la química, mediante la realización de la conexión indispensable entre el aprendizaje y la vida. La información sobre la actividad científica y pedagógica de científicos famosos, como los ejemplos personales más importantes, debe contribuir al creciente interés de los estudiantes en la disciplina química moderna.O artigo apresenta a revisão do uso do patrimônio científico e pedagógico de Gilm Khairevich Kamay(representante da famosa Escola de Química de Kazan, Doutor em Ciências Químicas, Professor), para odesenvolvimento do interesse de crianças em idade escolar pelo estudo da química.  A urgência deste problema é determinada pela necessidade de utilizar métodos pedagógicos e tecnológicoseficazes para ativar o interesse cognitivo dos estudantes em química, para uma melhor digestão doconhecimento. A importância dessa tarefa é intensificada como resultado das contradições emergentesentre o aumento da teorização do curso de química escolar e a falta de estreita conexão do materialestudado com a vida real. O professor tem que usar métodos metódicos para a formação do interesse dosestudantes em química, por meio da realização da conexão indispensável entre aprendizagem e vida.Informações sobre a atividade científica e pedagógica de cientistas famosos, como os mais importantesexemplos pessoais, devem contribuir para o crescente interesse dos estudantes na disciplina químicamoderna

Quality of life as the basis for achieving social welfare of the population

The paper discusses the concept and features of life quality as a socio-economic category. The main signs of quality of life of the population are shown. The analysis of different methodologies to measure indicators of life quality is given. It is shown that the most authoritative measure of the quality of life in the world is the “Human Development Index” (HDI). The main task of authorities at different levels to improve the quality of life of the population is described

Discrimination problems of retirement age employees

It is shown that there is an increasing number of people of retirement age; however, they fac