bluuebunny/crossref_metadata_2025 huggingface dataset:
Improving the profit generation management of a motor transport enterprise
Authors: Velyka Olena , Zasukha Hanna
Published: September 2019

Profit is the main purpose and the key result of any enterprise operation. Profit management involves two stages, namely, generation and distribution. Profit generation is the main stage in the overall process of profit management and not only the basis for its distribution, but also a source of the production assets renewal and the new self-financing of the further development of the enterprise. Based on the analysis of approaches to the essence and classification of company profits, an advanced complex classification is proposed. In order to improve the profit generation management of a motor transport enterprise and to identify the main factors affecting its profits, an analysis of technical and economic indicators, analysis of profitability indicators and SWOT analysis were carried out. Given the results obtained, a questionnaire was created and a survey was carried out among managers and specialists of the enterprise, which allowed to identify the factors that have the greatest impact on the activity of the motor transport enterprise. The factors are classified into external and internal. Also, a factor analysis of the company’s profit was carried out, which made it possible to determine key indicators that require priority attention in managing the profit generation at a motor transport enterprise. It was concluded that the most important external factors include the Ministry of Infrastructure’s activities aiming at adapting the world tendencies to the Ukrainian automotive industry. The internal factors in controlling the profit generation of the enterprises are in paying greatest attention to the volume of services rendered, their cost and the size of transportation tariffs.
Systemic-structural analysis of the machine-building enterprises economic sustainability formation mechanism
Authors: Dergachova Victoriia , Kravchenko Maryna , Kuznietsova Kateryna , Dergachova Anna , Melnykova Valeriia
Published: September 2019

Machine-building complex is a system-forming element of Ukrainian economy. Functioning of other industries in many respects depends on the results of its activity. Harsh conditions of globalized economic environment and geopolitical changes taking place in the country have negatively affected the state of machine-building enterprises and determined the need for increasing the level of their economic sustainability. As a result of using the systemic-structural approach, which is being developed in the context of the provisions of systemic economic theory, systemic-structural analysis of economic sustainability of several machine-building enterprises was performed. The study was conducted based on a sample of 16 machine-building enterprises and covered the 2015−2016 period. Economic sustainability was analyzed by way of defining in the structure of enterprises, econometric modeling and assessing the state of four subsystems with different space and time localization and further defining the level of mutual balance. The set of individual parameters for modeling every subsystem was determined mainly by way of regrouping of baseline statistical indicators, as well as expert assessments. Using such an approach enabled to determine structural peculiarities of machine-building enterprises development during the analyzed period and their effect on formation of volatility and stability properties, which ensure their sustainability in space and time. During the analyzed period, the determined disproportions of the subsystems in the structure of enterprises had systemic nature. The identification of economic manifestations of the determined disproportions enabled to formally define non-trivial dependencies between the economic phenomena, which took place in machine building, and to define the nature of their influence on the mechanism of economic sustainability formation. The risks affecting every subsystem under study had volatile nature, that’s why the issue of systemic risk management remains relevant.
O desenvolvimento da competência intercultural de alunos de Letras por meio do contato com assistentes de ensino americanas
Authors: Dutra Anelise Fonseca
Published: September 2019

O conhecimento de uma língua estrangeira já vem sendo apontado há anos como não apenas um direito, mas uma necessidade de alunos em todo o país. No entanto, o mero conhecimento linguístico não é suficiente para preparar os alunos para uma visão intercultural que os leve a conhecer diferentes culturas e relacioná-las com a sua própria. Neste caso é necessário que haja um ensino específico dessa competência. Este conhecimento não é inerente ao ensino de língua, sendo necessário que professores intencionalmente ajudem seus alunos a relacionar sua cultura com outras e a ter empatia com diferentes pontos de vista. Essa ideia é corroborada por vários autores. Este estudo tem como foco a presença de duas ETAs (English Teaching Assistants) em salas de aula do curso de Letras de uma universidade federal da região sudeste. Como objetivos principais deste estudo temos verificar a expectativa de alunos e professores em relação à presença de um professor nativo em sala e investigar até que ponto eles acreditam que o ensino intercultural deve fazer parte do ensino de língua. Os resultados indicam que os envolvidos acreditam que o desenvolvimento da competência intercultural é uma das principais contribuições da presença de professores de uma diferente nacionalidade em sala.
Comparison of the Efficacy of Repaglinide Versus the Combination of Mitiglinide and Voglibose on Glycemic Variability in Japanese Patients with Type 2 Diabetes
Authors: Okada Hiroshi , Tanaka Muhei , Hasegawa Goji , Nakajima Hanako , Kadono Mayuko , Okada Yuki , Hirata Atsuhiro , Oyamada Hirokazu , Yamane Tetsuro , Fukui Michiaki
Published: September 2019

Background:

Glycemic variability is a risk factor for total death and cardiovascular events. There are
no obvious guidelines for the direct treatment of glycemic variability, but it can be improved with the treatment of
postprandial hyperglycemia.

Objective:

We compared the effect of repaglinide versus the combination of mitiglinide and voglibose, used to
improve postprandial hyperglycemia, on glycemic variability in Japanese patients with type 2 diabetes.

Methods:

We performed an open-label randomized cross-over trial between April 2016 and April 2018. Patients
with type 2 diabetes who were admitted to our hospital were enrolled in our study (n = 12). Glycemic variability
was assessed using a continuous glucose monitoring system.

Results:

The average glucose level of the repaglinide phase (146.1 ± 20.7 mg/dl) and the combination of
mitiglinide and voglibose phase (132.3 ± 19.8 mg/dl) were similar (P = 0.10). The standard division (P = 0.0005),
coefficient of variation (P = 0.006), and mean amplitude of glycemic excursion (P = 0.002) of glucose were lower
in the combination of mitiglinide and voglibose phase than in the repaglinide phase.

Conclusion:

Treatment with the combination of mitiglinide and voglibose might be more effective than repaglinide
for the improvement of glycemic variability.
Surgical Robotic Technology for Developing an Endonasal Endoscopic Transsphenoidal Surgery (EETS) Robotic System
Authors: Chumnanvej Sorayouth , Pillai Branesh M. , Suthakorn Jackrit
Published: September 2019

Purpose:

Neurosurgical robots are acknowledged for their advantages in assisting neurosurgeons in enhancing their precision and accuracy. Here, the aim of this study is to report the first use as a robot-assisted Endonasal Endoscopic Transsphenoidal (EET) approach, applied to reach sphenoid sinus in a cadaver. The introduction of the seven tenets for the Endonasal Endoscopic Transsphenoidal approach will propel the feasibility of neurosurgical techniques and instruments for intrasellar lesions.

Methods:

Endonasal endoscopic transsphenoidal approach in a cadaver was performed under robot assistance with simple navigation system. This preliminary study reveals the accuracy and precision of the robot to reach a target at sphenoid sinus safely and within the shortest duration .

Results:

This robotic technology provided the foundation to support neurosurgeons when they are working in narrow and complicated surgical corridors with accuracy and precision.

Conclusion:

This article reveals the first robot-assisted Endonasal Endoscopic Transsphenoidal approach. This demonstrates the feasibility of the evolution and will augment neurosurgeons toward their limits of minimally invasive surgical techniques, manual dexterity, and spatial orientation. These tenets will be as state of the art and overcome the future challenges of Endonasal Endoscopic Transsphenoidal approach shortly.
Evaluation of a Tele-assistance Technological Tool in Activities of Daily Life of People with Visual Disabilities
Authors: Valencia Camilo Barrera , Álvarez Consuelo Vélez , Góme Héctor Darío Escobar , Chic Paola Tatiana Henao
Published: September 2019

Introduction:

Blind people lose an important degree of independence, which makes it difficult to carry out different activities of daily life.

Objective:

To develop and evaluate a telecare model that consisted of guiding a person with visual disability through a video conference to carry out activities of daily life.

Methods:

The telecare model is based on the guidance through voice commands. Telecare begins when a blind person, through a mobile device, transmits images, video and voice (video conference) in real-time to a person with normal vision in a different place that works as a guide, so that the guide knows the details of the blind person. The environment of the person that can solve immediate information needs, location or selection of objects requires visual support. It was evaluated with 37 people with visual disabilities through the Lawton & Brody scale.

Results:

It is an improved progressive evolution in the level of independence of the Lawton and Brody scale, which presents an advance of just over 2 points in the scale thanks to the tele-assistance application (p = 0.000).

Conclusion:

The participants were at a moderate level of dependence and, after the tele-assistance tests, their level was mild. The highest score was obtained in activities related to money management and purchases. In contrast, participants had less value activities within the home. The results allowed us to verify the effectiveness of telecare to improve the independence and well-being of people with visual disabilities.
Segregación estacional por sexo y edad de venado cola blanca en poblaciones de vida libre y encierro en Durango, México
Authors: Vega-Hernández Dania Melissa , Gallina-Tessaro Sonia Antonieta , Correa-Ramírez Miguel Mauricio , Chairez-Hernández Isaias , Soto-Cárdenas Miguel Angel
Published: September 2019

El venado cola blanca (Odocoileus virginianus) es una especie con valor económico, dado que es la especie cinegética más importante del país, por lo que es indispensable contar con datos confiables sobre su demografía para su mejor manejo. El objetivo de este trabajo fue analizar la segregación estacional por sexo y edad, a partir de grupos fecales, en dos grupos de venado cola blanca, uno en vida libre (UMA Salvador Allende, 3200 ha) y el otro en un encierro (UMA Molinillos, 300 ha) ubicados en el estado de Durango. Se colectaron grupos fecales para cada UMA cada dos semanas por 13 meses (del 1° de marzo 2015 al 31 de marzo 2016 en Salvador Allende y del 1° de octubre 2015 al 31 de octubre 2016 en Molinillos). Se midió el largo y ancho de 10 pellets fecales por grupo fecal y se calculó el volumen medio, para asignar los grupos fecales a una categoría de edad y sexo mediante la técnica de agrupamiento de conjuntos difusos (fuzzy sets). Se aisló ADN de los pellets fecales y se amplificó un fragmento del gen SRY para determinar el sexo de los animales que depositaron los grupos fecales y comparar con los resultados obtenidos de las medidas morfométricas de los pellets. Los datos espaciotemporales tomados de los grupos fecales, así como su identificación de edad y sexo, se utilizaron para calcular el grado de segregación sexual espacial (CSSE) en cada UMA. Se colectaron 351 grupos fecales frescos para ambas UMA durante todas las épocas del año, encontrando más grupos pertenecientes a hembras. En la población de vida libre se colectó un menor número de grupos fecales (112) que en la población en encierro (273). El grado de segregación espacial fue estadísticamente diferente entre épocas del año siendo mayores en verano en ambas UMA (0.910 para Salvador Allende y 0.943 en Molinillos) cuando ocurren los nacimientos. Los valores más bajos se presentaron en invierno (0.339) en Salvador Allende y en otoño (0.130) en Molinillos, cuando ocurre el celo, lo que indica que el CSSE estuvo regido por el comportamiento reproductivo. No se observó correlación entre el índice de segregación espacial y las variables ambientales. Hay que considerar las variaciones debidas a la segregación sexual y edad en cada época del año, ya que pueden afectar los resultados de estimaciones de población mediante la técnica de conteo de grupos fecales, dependiendo de la época en que se realicen, por lo que se recomienda llevar a cabo las estimaciones de población tanto en la época donde se presente el valor más alto de segregación sexual espacial, como en el más bajo para evitar sobreestimaciones.
Retrieving Peromyscus bullatus from P. difficilis (Rodentia: Cricetidae) through cranial morphometry in a mammal collection
Authors: Falfán Ina , Montero-Bagatella Sandra H. , González-Christen Alvar
Published: September 2019

Peromyscus bullatus and Peromyscus difficilis are sympatric and phenotypically similar rodents. Because of this, misidentification of both species is frequent in the field and in mammal collections. In this study, P. bullatus specimens were retrieved from the P. difficilis specimens, in the mammal collection of the Instituto de Investigaciones Biológicas of the Universidad Veracruzana, through the analysis of morphometric measurements of the tympanic bulla, proposed by González-Ruíz et al. (2005) as discrimination key variables between both species.
Registro notable de la golondrina Petrochelidon fulva (Vieillot, 1808): Passeriformes, Hirundinidae en el estado de Oaxaca, México
Authors: Ruiz-Velásquez Elder , Santos-Moreno Antonio
Published: September 2019

En este trabajo se documenta por primera vez la presencia de la golondrina pueblera (Petrochelidon fulva) en la región del Balsas de Oaxaca, México, así como su actividad reproductiva en la entidad. Con este registro se documenta la expansión de la golondrina pueblera en el Estado.
Динамика когерентности экситон-поляритонной системы в GaAs-микрорезонаторах при импульсном резонансном фотовозбуждении
Authors: Кулаковский В.Д. , Деменев А.А.
Published: September 2019

AbstractIt is found that exciton-polariton systems resonantly excited in GaAs semiconductor microcavities by coherent picosecond laser pulses inherit the high coherence of the laser beam and retain it for their lifetime (>100 ps), while the coherence-formation time in polariton systems resonantly excited by incoherent pulses without excitation of the exciton reservoir exceeds 200 ps.
Сравнительный анализ люминесценции слоев Ge : Sb, выращенных на подложках Ge(001) и Si(001)
Authors: Новиков А.В. , Юрасов Д.В. , Байдакова Н.А. , Бушуйкин П.А. , Андреев Б.А. , Юнин П.А. , Дроздов М.Н. , Яблонский А.Н. , Калинников М.А. , Красильник З.Ф.
Published: September 2019

Comparative studies of the luminescent properties of Sb doped Ge layers grown on Si (001) and Ge (001) substrates have been carried out. It is shown that in Ge:Sb/Ge(001) layers, in contrast to the Ge:Sb layers grown on silicon, indirect optical transitions make a significant contribution to the photoluminescence signal. This fact is associated with a longer lifetime of charge carriers in homoepitaxial Ge:Sb/Ge structures due to the absence of crystal lattice defects associated with the relaxation of elastic strain. It is shown that the significant increase in the contribution of direct optical transitions to the total photoluminescence signal observed at higher doping levels of Ge:Sb/Ge(001) layers is caused by an increase in the population of electronic states in the Г valley. The luminescent properties of Ge:Sb/Ge(001) and Ge:Sb/Si(001) layers with Sb concentration significantly exceeding its equilibrium solubility are strongly affected by the nonradiative recombination centers, which may be clusters of impurity atoms.
Микроволновое магнитопоглощение в HgSe с примесью Co и Ni
Authors: Вейнгер А.И. , Кочман И.В. , Фролов Д.А. , Окулов В.И. , Говоркова Т.Е. , Паранчич Л.Д.
Published: September 2019

AbstractFeatures of magnetic-field-dependent microwave absorption in HgSe samples doped with Co and Ni impurities in different concentrations are investigated. The electron-spin resonance spectra of weakly coupled Co atoms and peculiarities of the magnetic-absorption variation in a magnetic field passing through the zero value are established. The main parameters of the electron-spin resonance spectra and temperature and angular dependences of microwave absorption in weak fields are determined.
Влияние водорода на электрические свойства структур Pd/InP
Authors: Шутаев В.А. , Сидоров В.Г. , Гребенщикова Е.А. , Власов Л.К. , Пивоварова А.А. , Яковлев Ю.П.
Published: September 2019

AbstractThe influence of hydrogen on the electrical properties of Pd /n -InP and Pd/oxide/ n -InP structures is studied. It is found that a variation in the cutoff voltage $$\Delta {{U}_{{{\text{cut-off}}}}}$$ in the current–voltage characteristics of the structures under study upon exposure to hydrogen with concentrations of 0–1 vol % in a nitrogen–hydrogen mixture is described by the exponential dependence: $$\Delta {{U}_{{{\text{cut-off}}}}}$$ = a [1 – exp(– b ⋅ N _H)], where N _H is the hydrogen concentration (vol %), and a and b are constants dependent on the type of structures. It is shown that a decisive influence on how the potential-barrier height changes in the Pd / InP and Pd / oxide / InP structures in the presence of H_2 in a gas medium is exerted by a change in the Pd work function in an atmosphere of hydrogen. It is found that, in the structures under study, tunneling and thermal-tunneling charge-transport mechanisms operate at 90–300 K in the presence of hydrogen and without it. With increasing hydrogen concentration in the gas mixture, the predominance of the tunneling charge-transport mechanism becomes more pronounced.
Резкое уменьшение подвижности дырок при снижении внешним напряжением их двумерной концентрации в дельта-допированных бором слоях алмаза
Authors: Кукушкин В.А.
Published: September 2019

By analytical and numerical consideration it is shown that the mobility of holes in boron delta-doped (i.e. with thickness of order several lattice constants) layers in diamond drops with the decrease of their two-dimensional concentration in the process of the delta-doped layer depletion by an external voltage. This drop of the mobility is sharpest for maximal initial hole two-dimensional concentrations of order 3 10^13 cm^-2 (limited from above by the condition of the possibility of their substantial decrease without the electric breakdown of diamond) and is due to the significant mitigation of the screening degree of the ionized boron atom Coulomb potentials and the growth of the efficiency of the scattering of degenerate holes on them owing to the reduction of the kinetic energies of the latter. The corresponding calculations are carried out without the use of the Born approximation (i.e. the perturbation theory) because the conditions of its validity in boron delta-doped layers of diamond are not fulfilled. The predicted effect can be used to increase the source-to-drain current modulation by the gate voltage in diamond field-effect transistors with delta-doped conductive channels.
Полупроводниковая лазерная квазирешетка с фазированными одномодовыми каналами излучения
Authors: Гордеев Н.Ю. , Паюсов А.С. , Максимов М.В.
Published: September 2019

We have proposed a semiconductor laser design with a stripe waveguide, which geometry can make it possible to obtain radiation similar to that of a phase-locked laser array. The requirements for the laser quasi-array parameters and the technological feasibility of the proposed approach are discussed.
Механизмы пластической деформации в нержавеющей стали в условиях высокоскоростного проникания компактных ударников
Authors: Атрошенко С.А. , Григорьев А.Ю. , Савенков Г.Г.
Published: September 2019

The article presents the results of a study of the behavior of austenitic stainless steel 08Х18Н10Т under conditions of high-speed penetration with speeds of 1.5-2.0 km/s. It is shown that in penetration through the target three penetration zones are observed, differing in the mechanisms of plastic deformation and fracture.
Особенности структуры промежуточной фазы в цирконате-титанате свинца с высоким содержанием циркония
Authors: Андроникова Д.А. , Бронвальд Ю.А. , Леонтьев Н.Г. , Леонтьев И.Н. , Чернышов Д.Ю. , Филимонов А.В. , Вахрушев С.Б.
Published: September 2019

Results of X-ray diffraction in the intermediate ferroelectric phase of single crystal PbZr$_{0.993}$Ti$_{0.007}$O$_{3}$ are presented. Existence of M-type superstructures $q_{M}$ = \{$\frac{1}{2}$, $\frac{1}{2}$, 0\} and satellites around them, $q_{M}+\{\delta,\delta,\delta\}$, is confirmed. For the first time second order satellites $\{2\delta,2\delta,2\delta\}$ have been observed in the vicinity of $q_{M}$ and fundamental Bragg peaks. Structural model of regular system of antiphase domains is used for diffraction calculation. Calculated pattern includes M-type superstructures as well as first and second order satellites around $q_{M}$. It is shown that second order satellites around fundamental Bragg peaks could not be reproduced in the context of this model. The possible origin of the system of the superstructure reflection observed in the intermediate phase is discussed.
Исследование кинетики фазового перехода I рода в тетракозане С-=SUB=-24-=/SUB=-Н-=SUB=-50-=/SUB=- методом ИК-Фурье спектроскопии
Authors: Марихин В.А. , Гурьева С.А. , Мясникова Л.П. , Волчек Б.З. , Медведева Д.А.
Published: September 2019

The kinetics of the structural first order phase transition in the tetracosane С24Н50 monodisperse samples is studied with the help of FTIR spectroscopy. The temperature dependencies of the frequency and intensity of rocking (ν~ 720 cm-1) and bending (ν~ 1470 cm-1) vibrations of СН2-groupes in the methylene trans-sequences in the crystalline cores of the elementary lamellae are investigated. It is shown that the first order solid phase transition is developing on a heterogeneous mechanism in the narrow temperature interval (T~ 2 K) according to the theory of the diffused first order phase transitions and is due to the crystalline cell symmetry change.
Влияние зон Гинье-Престона на концентрационную зависимость предела текучести состаренных двухкомпонентных сплавов в условиях высокоскоростной деформации
Authors: Малашенко В.В.
Published: September 2019

AbstractThe glide of an ensemble of edge dislocations at the high-speed deformation of an aged binary metal alloy is theoretically analyzed. The yield stress of the alloy is a nonmonotone function of the second component concentration, which has a maximum and a minimum under certain conditions. The maximum corresponds to the transfer from the dominating influence of dislocation collective interaction on creation of a spectral gap to the prevalence of the influence of collective interaction of atoms of the second component. The minimum of the obtained curve corresponds to the transfer from the prevalence of the drag of the dislocation by the Guinier–Preston zones to the prevalence of its drag by the atoms of the second component.
Влияние рентгеновского излучения на валентное состояние Eu в люминофоре Y-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=- : Eu-=SUP=-3+-=/SUP=-
Authors: Зюзин А.М. , Салкин Д.А.
Published: September 2019

The effect of X-rays on the valence state of Eu ions in a Y2O3 matrix has been studied by the EPR method. The effect of charge exchange of Eu ions (Eu3 + → Eu2 + → Eu3 +) in the Y2O3 structure has been found. The mechanism of europium reduction to the divalent state under the action of X-ray irradiation has been described.
Преобразования радиационно-наведенных молекулярных точечных дефектов и центров окраски в кристаллах LiF под воздействием света
Authors: Брюквина Л.И.
Published: September 2019

The effect of UV light and light pulses of the integral light of lamps on γ-irradiated LiF crystals with impurities of hydroxyl ions and magnesium were investigated. The optical absorption and luminescence of color centers at different stages bleaching depending on the exposure time of the crystal under UV light or from the number of light pulses were studied. IR spectra of molecular complexes with hydrogen bond and hydroxyl ions at different stages of bleaching are present. The transformation of complexes with a strong hydrogen bond in complexes with a weak hydrogen bond, and vice versa under the action of light are shown. It is presented as molecular complexes with hydrogen bond affect transformations color centers in the process of crystal bleaching.
Искажение лигандного окружения ионов Gd-=SUP=-3+-=/SUP=- и Eu-=SUP=-2+-=/SUP=- в гранатах: Y-=SUB=-3-=/SUB=-Al-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-, Lu-=SUB=-3-=/SUB=-Al-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-, Y-=SUB=-3-=/SUB=-Ga-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-
Authors: Важенин В.А. , Артемов М.Ю. , Потапов А.П. , Фокин А.В.
Published: September 2019

Using the second-rank spin Hamiltonian experimental parameters of the rhombic Gd3+ and Eu2+ centers in three garnets, as well as the superposition approximation formalism, estimations of the relaxation of the impurity ions nearest environment have been made.
Моделирование смачивающих фазовых переходов в тонких пленках
Authors: Львов П.Е. , Светухин В.В. , Булярский С.В. , Павлов А.А.
Published: September 2019

In this study, we have analyzed the kinetics of wetting transitions in nanosized liquid films on the substrate surface in terms of the hydrodynamic model. In the region of metastable states, we have studied the regularities of equilibrium cluster formation and calculated the film thickness distribution. In the region of unstable states, the kinetics of phase transition leading to cluster formation has been explored. At the early stage, the holes of the thickness close to an equilibrium value are formed. Coalescence of holes causes redistribution of a substance in the film and leads to cluster formation. The kinetics of average size and concentration of the holes are calculated. For the clusters formed, the kinetics of average radius, average height, concentration, and their distribution function on radius and height have been studied.
Electronic properties of Aluminum Doped Carbon Nanotubes with Stone Wales Defects: Density Functional Theory -=SUP=-*-=/SUP=-
Authors: Nairat Mazen , Talla Jamal A.
Published: September 2019

AbstractAl-doped single wall carbon nanotube with Stone Wales defect was theoretically analyzed, two different orientations of chiral (8, 4) carbon nanotubes was doped among the joints of defective carbon rings. Density functional theory was implemented to study structural and electronic properties of Al-doped chiral carbon nanotubes. Doping bond lengths as well as their geometrical structure were determined at the different orientations. The electronic properties were also illustrated by evaluation band of the gap energies at each possible doping site. Our results indicated that not only Al-doping tune the band structure, but also dopant site played a crucial rule on manipulating physical properties of chiral carbon nanotubes.
Структурные, оптические и термоэлектрические свойства тонких ZnO:Al пленок, полученных атомно-слоевым осаждением
Authors: Тамбасов И.А. , Волочаев М.Н. , Воронин А.С. , Евсевская Н.П. , Масюгин А.Н. , Александровский А.С. , Смолярова Т.Е. , Немцев И.В. , Лященко С.А. , Бондаренко Г.Н. , Тамбасова Е.В.
Published: September 2019

Thin films of aluminum doped zinc oxide were grown using atomic layer deposition at a temperature of 200 ° C. Using X-ray diffraction, it was found that thin ZnO: Al films have peaks from the (100), (002), (110) and (201) planes of the hexagonal ZnO phase. The (101) and (102) planes were also detected using electron diffraction. Thin ZnO: Al films grow smooth with a root-mean-square roughness of Rq of 0.33 nm and characteristic nanocrystallite sizes of ~ 70 and ~ 15 nm without additional phases associated with aluminum or aluminum oxides. The transmission at a wavelength of 550 nm, taking into account the substrate, was ~ 96%. The refractive indices and absorption coefficients of thin ZnO: Al films in the wavelength range of 250–900 nm were found. The maximum values ​​for the refractive and absorption coefficients were 2.09 at a wavelength of 335 nm and 0.39 at a wavelength of 295 nm, respectively. The optical band gap was 3.56 eV. The resistivity, the Seebeck coefficient and the power factor of thin ZnO: Al films were ~ 1.02 · 10-3 Ohm · cm, ~ - 60 μV / K and 340 μW · m-1 · K-2 at room temperature, respectively. The maximum power factor reached 620 μW · m-1 · K-2 at a temperature of 200 ° C.
Является ли кинковое решение нелинейного уравнения Клейна--Гордона солитоном?
Authors: Завьялов Д.В. , Конченков В.И. , Крючков С.В.
Published: September 2019

The possibility of the existence of soliton solutions of the generalized sine-Gordon equation (also referred to as Kryuchkov-Kukhar equation (KKeq)) has been investigated numerically. This equation describes the propagation of electromagnetic waves in a graphene superlattice. The computational errors associated with the implicit form of the expression defining the kink solution of the considering equation are estimated. The differences between the forms before and after the collision of pulses, propagating towards each other, are estimated. On the basis of the obtained results it is concluded that the considered kink solution is not a soliton.
Общие свойства ядер интеграла столкновений нелинейного уравнения Больцмана
Authors: Бакалейников Л.А. , Флегонтова Е.Ю. , Тропп Э.А.
Published: September 2019

AbstractWe consider general properties of kernels of the inverse collision integral, as well as kernels of integral operators appearing in the expansion of the collision integral in spherical harmonics. The recurrent relations between kernels obtained earlier are generalized to the case of interaction of particles with different masses. It is shown that the obtained properties ensure additive invariance of the number of particles, energy, and momentum.
Нелинейные эффекты в поле вязких волн, возбужденном пластиной конечных размеров
Authors: Павлов В.А. , Павловский А.С. , Семёнова Н.Г.
Published: September 2019

The numerical study of nonlinear non-stationary velocity and pressure fields close to an absolutely rigid plate oscillating in incompressible viscous fluid along its length was performed. The plate had an infinitesimal thickness and finite length. The study showed that limiting the length of the plate leads to the problem non-linearity, which appears even with a small amplitude of the plate surface oscillations. We also studied the velocity and pressure fields with large amplitudes of the plate surface oscillations. The arising of the plug flows during the oscillations of the plate of infinitesimal thickness and finite length was explained in terms of viscous waves. The instant vortex motion formation mechanism in viscous fluid was uncovered.
Устойчивые и неустойчивые режимы плазменных диодов при наличии столкновений электронов
Authors: Pramanik S. , Кузнецов В.И. , Chakrabarti N.
Published: September 2019

A thermionic energy converter is modelled by the Pierce diode which inter-electrode region
is filled uniformly with immovable ions. Stability features of such diode steady states in the
presence of electron-gas background collision are studied. Time-independent solutions are
analytically obtained by Lagrangian formalism. Using a perturbation approach we derived a
relevant dispersion equation. Both aperiodic and oscillatory solutions of such an equation are
studied. The regions corresponding to unstable aperiodic modes are specifed. On the other
hand, all oscillatory modes are shown to be stable.
Моделирование плазмы короткодугового ксенонового разряда сверхвысокого давления
Authors: Тимофеев Н.А. , Сухомлинов В.С. , Zissis G. , Мухараева И.Ю. , Михайлов Д.В. , Dupuis P.
Published: September 2019

AbstractWe have studied a high- (ultrahigh-) pressure short-arc discharge in xenon with thoriated tungsten cathodes. A system of equations formulated based on earlier experimental data indicating possible emission of cathode material (thorium) into the discharge gap has made it possible to determine the electric field strength, plasma temperature, and concentration of thorium atoms as well as thorium and xenon ions in the plasma. The problem has been solved for a model discharge between planar electrodes. The results indicate the key role of thorium atoms in the cathode region. Thorium atoms determine the ionization balance and other electrokinetic properties of plasma. Emission of thorium atoms reduces the plasma temperature at the cathode, which turns out to be noticeably lower than the plasma temperature near the anode; this is a new result that agrees with experimental data. Other electrokinetic characteristics of the plasma (in particular, charged particle concentration and electric field strength) are also in good agreement with the experiment.
Магнитные свойства прессованных нанопорошков гексаферрита бария
Authors: Тимофеев А.В. , Костишин В.Г. , Макеев Д.Б. , Читанов Д.Н.
Published: September 2019

Magnetic force microscopy and magnetometry were used to study the magnetic characteristics of pressed nanosized powders BaFe12O19. The powders were obtained by chemical coprecipitation. Magnetic anisotropy of the “easy-plane” type, formed after the pressing operation, was found. The nature of the appearance of anisotropy is discussed.
Дефектная мода в СВЧ волноводных брэгговских структурах с металлическими штырями
Authors: Усанов Д.А. , Скрипаль А.В. , Посадский В.Н. , Тяжлов В.С. , Байкин А.В.
Published: September 2019

AbstractA waveguide Bragg structure containing equidistant cylindrical pins that are galvanically coupled to a wide wall of the waveguide is used to implement frequency response functions characterized by the presence of a band gap. Characteristics of a defect mode of the microwave photonic crystal with a pin element as a defect with an n – i – p – i – n structure with controlled conductivity placed in the capacitive gap are experimentally studied and calculated. Controlled reflectance of a microwave signal with a dynamic range of greater than 50 dB is obtained at the frequency of the defect mode.
Эмиссионные свойства сплава Pb-Ba, активированного лазерным облучением
Authors: Донаев С.Б. , Умирзаков Б.Е. , Мустафаева Н.М.
Published: September 2019

A comparative analysis of the effect of temperature and laser activation on the values of the secondary electron emission coefficient (SEEC) and the work function eφ of the alloy Pd-Ba (Ba - 1.5 at.%) was carried out. It is shown that the optimum energy density of laser irradiation is ~ 2 J∙cm-2. The main reasons for the decrease in the emission efficiency of Pd-Ba for prolonged warming have been determined.
Угловые зависимости спектров пропускания фотонно-кристаллических пленок на основе оксида алюминия
Authors: Свербиль П.П. , Горелик В.С. , Bi Dongxue , Fei Guang Tao , Xu Shao Hui , Gao Xu Dong
Published: September 2019

AbstractThe angular dependences of the transmission of a one-dimensional photonic crystal based on porous anodic aluminum oxide are studied in the wavelength range of 320–1200 nm. The possibility of using porous one-dimensional photonic crystals based on aluminum oxide as selective narrowband optical filters and mirrors is studied.
Влияние дрейфа частоты лазера в фазочувствительной рефлектометрии
Authors: Жирнов А.А. , Степанов К.В. , Чернуцкий А.О. , Федоров А.К. , Нестеров Е.Т. , Звелто Ч. , Пнев А.Б. , Карасик В.Е.
Published: September 2019

AbstractThe influence of the laser frequency drift on the operation of phase-sensitive optical time domain reflectometry (φ-OTDR) systems is considered. Theoretical results based on a new numerical φ-OTDR model demonstrating the influence of the laser frequency instability on a signal are reported. This model is verified based on experimental data. It has been used to calculate the signal-to-noise ratio (SNR) of the system for different parameters of the laser source stability. As a result, quantitative requirements for lasers used in φ-OTDR systems are formulated.
Динамическая прочность керамических материалов на основе ZrO-=SUB=-2-=/SUB=-, изготовленных по аддитивной технологии
Authors: Промахов В.В. , Савиных А.С. , Дубкова Я.А. , Шульц Н.А. , Жуков А.С. , Разоренов С.В.
Published: September 2019

The ceramic and composite ceramic materials based on ZrO2 have been prepared by the additive manufacturing. The experimental investigations on the shock-wave loading of the fabricated samples were carried out. The Hugoniot elastic limit and spall strength of the ceramic samples were determined by analyzing the full wave profiles recorded by means of the laser velocimeter under their shock compression.
Особенности вольт-амперной характеристики микродисковых лазеров на основе квантовых ям-точек InGaAs/GaAs
Authors: Зубов Ф.И. , Моисеев Э.И. , Корнышов Г.О. , Крыжановская Н.В. , Шерняков Ю.М. , Паюсов А.С. , Кулагина М.М. , Калюжный Н.А. , Минтаиров С.А. , Максимов М.В. , Жуков А.Е.
Published: September 2019

Microlasers formed by deep etching with an active region based on arrays of InGaAs/GaAs quantum well-dots were studied. The way how the current-voltage characteristic changes with decreasing microlaser diameter indicates the formation of a nonconducting layer about 1.5 μm thick near the side walls, which leads to a decrease in the effective area of current flow
Локализация электронов верхних долин в узкозонном канале --- возможный дополнительный механизм увеличения тока в DA-DpHEMT
Authors: Пашковский А.Б. , Богданов С.А.
Published: September 2019

Abstract: The theoretical estimation of the effect of electron localization in the upper valleys in the narrow-band channel of transistor heterostructures AlxGa1–xAs-GaAs with two-sided doping on the value оf drift velocity overshoot is carried out. It is shown that for transistor heterostructures with donor-acceptor doping, in which the proportion of electrons transferred from the narrow-band channel to the wide-band material is less than in conventional structures, in some cases, the drift velocity increase can reach 15 % due to the localization of electrons in the upper valleys in the narrow-band channel. The studied effect can be an additional mechanism for increasing the current in transistors based on heterostructures with donor-acceptor doping.
Люминесцентные свойства выращенных на InP слоев GaInAsP с градиентом состава по толщине
Authors: Гагис Г.С. , Власов А.С. , Левин Р.В. , Маричев А.Е. , Щеглов М.П. , Попова Т.Б. , Бер Б.Я. , Казанцев Д.Ю. , Чистяков Д.В. , Кучинский В.И. , Васильев В.И.
Published: September 2019

The photoluminescent properties at 77 and 300 K are investigated for Ga1 xInxAsyP1 y epilayers with V-group elements content gradient Δy up to 0.08 across whole thickness (about 1 µm). Ga1 xInxAsyP1 y layers with high Δy values have widened photoluminescence spectra. For GaInAsP layers of low crystaline perfection, photoluminescence was either absent or manifested itself as it is typical for transitions involving impurity levels.
Исследование взаимного влияния группы ударников при высокоскоростном одновременном входе в воду
Authors: Ищенко А.Н. , Афанасьева С.А. , Буркин В.В. , Дьячковский А.С. , Чупашев А.В.
Published: September 2019

The work is devoted to an experimental study of the high-speed motion of a group of supercavitating kinetic strikers while entering the water. An experimental technique of throwing and studying high-speed movement of a group of supercavitating strikers on a hydro-ballistic stand was developed. Experimental data on the motion of two supercavitating strikers in the initial section of the trajectory at speeds of about 1200 m/s are obtained, which demonstrate the possibility of stable motion of a group of supercavitating strikers in the water and their achievement of an underwater target under different conditions of the shot.
Importance of Visceral Obesity and Testosterone Deficiency in the formation of metabolic disorders in men
Authors: Gusova Z. R. , Dzantieva E. O.
Published: September 2019

Background. During a long time, men appraise the problem of overweight as a natural process of aging in the conditions of social demand and physical inactivity. Therefore, there is usually no reason to see a doctor and conduct a clinical examination. In this regard, obesity-associated metabolic diseases are often diagnosed late in the complication stage.

Objective. Assessing the effects of obesity and androgen deficiency on the development of metabolic disorders in men.

Materials and methods. 120 men with obesity aged 29–56 years who considered themselves healthy were examined. The patients were divided into two groups: in-group 1 included 56 people with a normal level of total testosterone (T), in-group 2 included 64 people with a level of total T less than 12.1 mmol / l, accordingly. The main indicators of carbohydrate, lipid, purine metabolism, and the level of sex hormones were investigated.

Results. Аnalysis of the metabolic status of obese men who considered themselves completely healthy revealed a high incidence of dyslipidemia, arterial hypertension, insulin resistance (IP), carbohydrate metabolism disorders and purine metabolism, and fatty hepatosis. The most significant changes were identified in the group of patients with testosterone deficiency.

Conclusion. Visceral obesity in men is a high-risk factor for the formation of metabolic disorders. Androgen deficiency completed obesity leads to the formation of more severe metabolic changes in patients and the development of erectile dysfunction. Men with visceral obesity, even in the absence of actively complain need careful examination. It should include, along with the assessment of biochemical indicators of metabolic status, also control of the level of total serum testosterone.
Masks of Chronic Prostatitis: Overactive bladder and Myofascial Syndrome. Case study
Authors: Kulchavenya E. V. , Baranchukova A. A.
Published: September 2019

Prostatitis is a chronic disease that does not respond well to therapy. It is prone to frequent relapses and does not have a clear and unambiguous clinical picture, which can lead to diagnostic failure. A case of overactive bladder and myofascial syndrome described. The clinical picture was interpreted as «chronic prostatitis» erroneously. Differentiated analysis of the International Prostate Symptom Score (IPSS) and NIH-CPSI (National Institute of Health Chronic Prostatitis Symptom Index) questionnaires, as well as palpation of trigger points made it possible to establish the correct diagnosis. The following drugs were prescribed: Trospium chloride (Spasmex® ) 15 mg twice a day, Baclоfen (Baclophenum) 10 mg daily, Combilipen (B vitamins multicomplex) intramuscularly, Nimesulide (Nimesulide) orally, and locally low-intensity laser therapy. The patient noted a marked improvement after 14 days: the pain intensity decreased from 8 points to 1, urination urgency was not noted, nocturia stopped. The quality of life (QoL) accordingly improved to 1 point on the IPSS scale. The total score for domains III and IV decreased from 11 to 3 according to the NIH-CPSI symptom scale of chronic prostatitis. The pronounced positive dynamics of the patient’s state of health has confirmed the accuracy of the diagnosis and treatment.
Editorial
Authors: Erazo Kalil
Published: September 2019

No precisa de resumen.
Análisis probabilístico de riesgo sísmico y terremoto de diseño para Santiago, República Dominicana
Authors: Erazo Kalil
Published: September 2019

Este artículo presenta los resultados de un análisis probabilístico de peligro sísmico (APPS) llevado a cabo para un lugar en la ciudad de Santiago, localizada en la República Dominicana. Para realizar el APPS se utilizaron datos sismológicos recientes de la falla Septentrional (fuente sísmica) para calibrar un modelo de recurrencia de terremotos y para calcular las curvas de peligro sísmico de varios parámetros de terremotos, movimiento del suelo y respuesta estructural de interés en aplicaciones de ingeniería sísmica. Los parámetros estudiados incluyen aceleración horizontal pico del suelo y ordenadas del espectro de pseudo-aceleración, con 5 % de amortiguamiento. El efecto de la incertidumbre en la ubicación en la falla de la zona de ruptura es estudiado usando un análisis de Monte Carlo; con este propósito la ubicación de la ruptura se trata como una variable aleatoria en la dirección de la falla. Los resultados del APPS son comparados con el espectro de diseño del sitio con 2 % de probabilidad de excedencia en 50 años, especificado en el código de la República Dominicana. Se concluye que hay un 17 % de probabilidad de que el valor actual de las ordenadas espectrales con 2 % de excedencia sea mayor que el valor especificado en el espectro de diseño, debido a las incertidumbres relacionadas a la ley de atenuación usada para relacionar la fuente de terremotos y las características del movimiento del suelo en el lugar. Basado en el modelo de atenuación, el espectro de diseño en el sitio es consistente con los espectros generados por terremotos de magnitud (momento) de 7.9, lo cual es cercano al terremoto característico de magnitud de 7.8 estimado en estudios anteriores de la falla Septentrional.
Comunicação pública da ciência por meio da exposição “Plataforma Zebrafish: a construção de uma red”
Authors: Lopes Ferreira Mônica , Vieira da Silva Guilherme , Almeida Adriana
Published: September 2019

Este artigo descreve a exposição “Plataforma Zebrafish: a construção de uma rede” como ação de comunicação pública da ciência e apresenta resultados de sua avaliação. A exposição é uma das ações empreendidas pela área de divulgação do CeTICS — Centro de Pesquisa em Toxinas, Resposta-Imune e Sinalização Celular. Para avaliar a exposição foram criados questionários para que os visitantes respondessem pela Internet após a visita. Os resultados indicam apreciação da exposição pela maior parte dos visitantes e interesse pelos temas tratados. A avaliação trouxe alguns elementos que orientam futuras modificações na exposição e subsidiam outras ações de divulgação da Plataforma Zebrafish e da Rede Zebrafish. Por exemplo, o interesse em conhecer mais profundamente as pesquisas realizadas e seus resultados, assim como outras características de peixe zebrafish, indica que é possível ampliar e aprofundar alguns dos temas já tratados na exposição.
Understanding Dominance of the Justice and Development Party in Turkey: the Ideological Dimension
Authors: Matiuhin V V
Published: September 2019

The article examines the ideological dimension of dominance of the Justice and Development Party in the Turkish political process. Analysis of the party's doctrine and its leaders’ statements reveals the pivotal elements of the ideology that facilitated strengthening of the JDP's stance as a dominant party, i.e. liberal and democratic values, social conservatism, modernism, globalism and Neo-Ottomanism. These center-right orientations, being vague and eclectic, helped “democratic Islamists” to show both ideological rigidity and flexibility necessary to mobilize broad masses of Turkish voters and to keep long-term public support.
Media Technologies and Their Role in the Information Warfare
Authors: Fedorov V A , Borhsenius A V
Published: September 2019

The article analyzes the new role of the mass media in the modern information space, the basic techniques and technologies of focused preparation, semantic distortion and emotional coloring of the transmitted information. The value of the mass media is estimated as the main weapon of the information warfare in the modern geopolitical space. Specific examples and techniques for manipulating information.