Formation of instrumental executive skills of student-bachelors in music pedagogical education

The article actualizes the problem of forming instrumental performing skills for bachelor students of music and pedagogical education. The notion «instrumental performing skills» is formulated, stages of their formation are offered. The possibilities of introduction of modern computer tools in the educational process are consideredВ статье актуализируется проблема формирования инструментальных исполнительских навыков у студентов-бакалавров музыкально-педагогического образования. Формулируется понятие «инструментальные исполнительские навыки», предлагаются этапы их формирования. Рассматриваются возможности внедрения современных компьютерных средств в учебный процес

The problem of performing skills’ formation of undergraduate students in the realities of the existing teaching methods

The article describes the main reasons for reducing the rate of performing skills’ development of undergraduate students within a modern education system. Possibilities of educational program’s reforming by applying the musical-computer technology as a part of a curriculum and teacher’s tool used to increase the level of student’s interest in a self-learning are concerned. The examples of the base used by the software to achieve the main objectives – good fundamental understanding of the subject and facilitation of the performance skills’ acquisition by increasing the personal interest of the student in this process are given. The author of the article does not aim to identify and list specific technological achievements which allow to accelerate the process of performing skills’ development, as well as to adapt them according to the current trends, since the technological possibilities are endless, but offers to evaluate and implement a fundamentally new approach in teachingВ статье раскрываются основные причины снижения скорости формирования исполнительских навыков у студентов-бакалавров в рамках современной системы образования. Рассматриваются возможности реформирования образовательной программы путем применения музыкально-компьютерных технологий, как составной части учебного плана и инструмента педагога, используемого для повышения уровня заинтересованности студента в самообучении. Приводятся примеры используемой программной базы для достижения основной задачи – качественного и глубокого понимания предмета и упрощения приобретения исполнительских навыков путем повышения личной заинтересованности студента в данном процессе. Автор статьи не ставит целью определить и перечислить конкретные технологические достижения, позволяющие ускорить процесс формирования исполнительских навыков, а также адаптировать их под современные тенденции, так как технологические возможности безграничны, но предлагает оценить и внедрить принципиально новый подход в обучени

Porous Silicon Photonic Crystal as a Substrate for High Efficiency Biosensing

Photonic crystals offer great possibilities for the improvement of performance of different kinds of devices. Due to the ability to control the light propagation and to change optical properties via interaction with the media photonic crystals have been widely used to increase the sensitivity of biosensing in many experimental setups. Among them some of the most interesting for practical applications are one-dimensional porous silicon photonic crystals. They could be easily fabricated, have big surface area, high sorption abilities, and have been shown to be able to change the emission of embedded luminophores. In this study we have fabricatedand performed the comprehensive investigation of the properties of hybrid system consisting of the porous silicon one-dimensional photonic crystals embedded with semiconductor quantum dots as the luminophores. We have demonstrated the ability of these systems to enhance the photoluminescence of luminophores and serve as the substrate for the high efficient biosensing. Keywords: Porous silicon, microcavity, quantum dots, luminescence enhancemen

Modeling and Optimization of the Porous Silicon Photonic Structures

Photonic crystals and optical devices based on them are of great interest nowadays and are widely used in photonics, optoelectronics, and biosensing. One of the most practically using materials to fabricate one-dimensional photonic crystal is porous silicon due to the simple fabrication process, high porosity and ability to select precisely the refractive index by controlling the porosity. It has already been shown as the suitable material to be used as an element of many photonic devices including gas sensors and biosensors. However, because of the complicated porous structure, and silicon oxidation, occurring at the atmosphere conditions, optical properties of porous silicon photonic structures need to be stabilized by preventive oxidation. In order to predict eventual optical properties of fabricated photonic structures an adequate modeling should be performed. In our study we have developed a calculation model based on the combination of effective media approximations and transfer matrix method, which could precisely predict the reflection, transmission of the porous silicon photonic structures taking into account the dispersion of the refractive index of silicon and silicon oxide, and the oxidation degree. We also used numerical finite-difference time-domain calculations in order to investigate the luminescent properties of the lumiphores embedded into the porous photonic structure. Keywords: Porous silicon, microcavity, transfer matrix, effective media, FDT

Nonsteady condensation and evaporation waves

We study motion of a phase transition front at a constant temperature between stable and metastable states in fluids with the universal Van der Waals equation of state (which is valid sufficiently close to the fluid's critical point). We focus on a case of relatively large metastability and low viscosity, when it can be shown analytically that no steadily moving phase-transition front exists. Numerically simulating a system of the one-dimensional Navier-Stokes and continuity equations, we find that, in this case, the nonsteady phase-transition front emits acoustic shocks in forward and backward directions. Through this mechanism, the front drops its velocity and eventually comes to a halt. The acoustic shock wave may shuttle, bouncing elastically from the system's edge and strongly inelastically from the phase transition front. Nonsteady rarefaction shock waves appear in the shuttle process, despite the fact that the model does not admit steady rarefaction waves propagating between stationary states. If the viscosity is below a certain threshold, an instability sets in, driving the system into a turbulent state. This work was supported by the Japan Society for Promotion of Science.Comment: revtex text file and four eps files with figures. Physical Review Letters, in pres

Тематическая группа «Информационные технологии» в английском языке

The article deals with the national specificity of the English thematic group «Information technologies». The aim of the undertaken research was to describe and analyze the composition of the group. The components of this group were selected from the Dictionary of the information security terms. The research has shown that the English thematic group «Information technologies» comprises 519 lexical units, which were categorized according to the semantic criteria into six subgroups: 1) The names of people involved in the sphere of the information technologies (IT); 2) The names of the attributes of the IT; 3) The names of the attacks in the sphere of the IT; 4) The names of the documents connected with the IT; 5) The names of actions performed in the sphere of the IT; 6) The names of the IT characteristics. The group structure analysis has revealed 6 subgroups, 24 minigroups, 10 microgroups, thus 40 structural elements in total.В статье рассматривается национальная специфика тематической группы «Информационные технологии» в английском языке. Цель проведенного исследования – определить состав тематической группы «Информационные технологии» в английском языке и структурировать ее по семантическому критерию. Материалом исследования послужили субстантивные единицы, отобранные методом сплошной выборки из Словаря терминов по информационной безопасности. Анализ показал, что тематическая группа «Информационные технологии» в английском языке включает в себя 519 лексических единиц, которые подразделяются на 6 подгрупп: 1) Наименования лиц, специализирующихся в сфере информационных технологий (ИТ); 2) Наименования средств, применяемых в сфере ИТ; 3) Наименования видов атак на программное обеспечение; 4) Наименования документации, связанной с информационными технологиями; 5) Наименования действий, производимых в сфере ИТ; 6) Наименования свойств информационных технологий. Анализ структурной сложности выявил, что данная группа лексики состоит из 6 подгрупп, 24 минигрупп, 10 микрогрупп, итого – 40 структурных единиц

Fine-tuning of Silica Coating Procedure for Preparation of Biocompatible and Bright Pbs/Sio2 Qds

Near-infrared semiconductor PbS quantum dots (QDs) with emission in biological transparency window are promising material for in vivo biolabelling and deep-tissue imaging of biological specimen. Among various approaches that render initially hydrophobic and toxic QDs biocompatible, the growth of a silica shell on the QD surface represents an efficient method to minimize QD toxicity. Nevertheless, it is important to preserve QDs emission properties after the silica coating procedure. Here we report on the optimal parameters of this procedure which allow to obtain a stable silica shell and maintain the optical properties of initial PbS QDs. Furthermore, we show that PbS QDs with the optimal SiO2 shell retain their luminescence quantum yield even after condensation into a solid film. Thus, our procedure can become a basis in development of bright, receptor-targeted NIR fluorescent probes for in vivo tumor imaging. Keywords: quantum dot, SiO2 shell, bioimagin

Различные методы изучения семантики лексемы

The article analyzes the ways of studying the semantics of a word. At the current stage of development of the linguistic science various methods of studying the meaning of a lexeme have been proposed by different linguistic schools. The peculiarities of the component, contrastive and contextual analysis of the lexeme «battle» are described in this article. The undertaken research shows that different methods of linguistic analysis of a word are aimed at different semantic aspects. Due to the component analysis the semantically closest lexemes have been identified. The contrastive analysis has identified the best translation of the lexeme «battle». The contextual analysis has shown how the meaning of the lexeme «battle» changes depending on the context. As a result, all the semantic components, the lexicographic and communicative meanings of the word “battle” have been identified. The research shows that all these methods are interrelated and allow to perform deeper analysis of a lexeme.В статье анализируются различные способы изучения семантики лексической единицы. На данном этапе развития лингвистической науки разными лингвистическими школами предложены различные методы изучения значения лексемы. В данной статье рассматриваются особенности компонентного, контрастивного и контекстуального анализа лексемы “battle”. Исследование показало, что различные методы лингвистического анализа направлены на различные семантические аспекты. В ходе компонентного анализа определены семантически близкие лексемы. Контрастивный анализ помогает выбрать лучший перевод лексемы «battle». Контекстуальный анализ демонстрирует как значение лексемы «battle» меняется в зависимости от контекста. В результате исследования были выявлены все семантические компоненты, лексикографическое и коммуникативное значения лексемы «battle». Исследование показывает, что все методы взаимосвязаны и позволяют осуществить более глубокий анализ слова

Highly Stable, Water-Soluble CdSe/ZnS/CdS/ZnS Quantum Dots with Additional SiO2 shell

Quantum dots (QDs) are fluorescent nanocrystals extensively used today in research and applications. They attract much interest due to the high photostability and fluorescence quantum yields close to 100%. The best QDs are made by synthesis in organic media, and they have to be transferred into aqueous solutions if biomedical applications are concerned. An advanced method for rendering QDs water-soluble is to coat them with hydrophilic SiO2 -layer. However, growing a silica shell with a predetermined thickness is a problem, because uncertain values of the molar extinction coefficients (ε) of core/shell QDs made it impossible to calculate precise yields of the chemical reactions involved. Here we suggest an approach to solving this problem by constructing the structural models of per se and silica-coated QDs followed by measuring ε in a course of the QD synthesis, thus carrying out precise quantitative reactions. Proceeding in such a way, we prepared the CdSe/ZnS/CdS/ZnS QDs with the structure predicted by the model and coated by silica shell. Prepared QDs are characterized by a narrow size distribution and the same fluorescence parameters as the original QDs in the organic medium. Developed approach permitted efficient QDs water-solubilisation and preparation of stable nanoparticles for plethora of biomedical applications.     Keywords: Quantum dots, QD, silica shell, core-shel