Limit Theorems for Non-Critical Branching Processes with Continuous State Space

2000 Mathematics Subject Classification: Primary 60J80, Secondary 60G99.In the paper a modification of the branching stochastic process with immigration and with continuous states introduced by Adke S. R. and Gadag V. G. (1995) is considered. Limit theorems for the non-critical processes with or without non-stationary immigration and finite variance are proved. The subcritical case is illustrated with examples

Inhomogeneous charged pion condensation phenomenon in the NJL2_2 model with quark number and isospin chemical potentials

The properties of two-flavored massive Nambu--Jona-Lasinio model in (1+1)-dimensional spacetime are investigated in the presence of isospin and quark number chemical potentials. The consideration is performed in the large-$N_c$ limit, where $N_c$ is the number of colored quarks. It is shown in the framework of this model that charged pion condensation phenomenon of dense quark/hadron isotopically asymmetric matter is rather a spatially inhomogeneous than a homogeneous one.Comment: 11 pages, 8 figures; version accepted for publication in PRD. arXiv admin note: text overlap with arXiv:1106.2928, arXiv:1102.407

Chiral density waves in the NJL2_2 model with quark number and isospin chemical potentials

We investigate the phase portrait of the (1+1)-dimensional massless two-flavored NJL$_2$ model containing a quark number chemical potential $\mu$ and an isospin chemical potential $\mu_I$ in the limit of a large number of colors $N_c\to\infty$. Particular attention is paid to the question to what extent the inclusion of an isospin asymmetry affects chiral condensates to have a spatial inhomogeneity in the form of the so-called chiral density waves (CDW) (chiral spirals). It is shown that at zero temperature and comparatively small values of $\mu$, i.e. at $\mu<\mu_c\approx 0.68M_0$ ($M_0$ is the dynamical quark mass in the vacuum) only the homogeneous charged pion condensation phase is realized for arbitrary nonzero values of $\mu_I$. Contrary to this, for large values of $\mu>\mu_c$, two CDW phases appear in the $(\mu_I,\mu)$-phase diagram of the model. In the first phase, CDWs are clockwise twisted chiral spirals and in the second phase they are counterclockwise. The influence of nonzero temperature on the formation of the CDW phases is also investigated.Comment: 14 pages, 9 figures; typos corrected; one reference adde

Numerical simulation of hot desulfurization transport reactor

The model of hot desulfurization transport reactor was presented. Hydrogen sulfide was removing from syngas by sorbents based on zinc oxide. The function of dependence between volume fraction of solid phase in multiphase flow and relation of gas flow rate and sorbent flow rate was defined for flow velocity 5 m/s. The dependence of reactor height from main input parameters was presented, and critical reactor height was found.Разработана модель расчета транспортного реактора для сухой горячей сероочистки синтез газа от сероводорода при помощи сорбентов на основе окиси цинка. В ходе расчетов была определена зависимость порозности слоя в многофазном потоке от соотношения расхода газа к расходу сорбента при скорости потока 5 м/с. Была получена зависимость высоты реактора от основных входных параметров а так же определена критическая высота реактора

Comprehensive assessment of the quality of life of patients with glaucoma when using various methods of treatment

Background. Research and maintenance of an acceptable quality of life is considered to be the main aim of treating chronic incurable disease including glaucoma.The aim. To perform a comprehensive assessment of the quality of life of patients with glaucoma when using various types of surgical and conservative treatment before treatment and 1 month after treatment.Material and methods. We carried out a randomized controlled study which included 229 patients, divided into 2 groups. The first group of patients (133 people) received various types of surgical intervention for glaucoma, consisted of 6 subgroups. They had the following types of surgeries: sinus trabeculectomy with the use of “Glautex” drainage implant; classical sinus trabeculectomy; sinus trabeculectomy with implantation of drainage made of a collagen hemostatic foam; transscleral laser cyclocoagulation of the ciliary body; cataract phacoemulsification in comorbid primary open-angle glaucoma and in primary closed-angle glaucoma. The second group consisted of 96 patients who received conservative treatment; it consisted of 4 subgroups. Patients of subgroups of the 2nd group received various types of conservative therapy against the background of local antihypertensive therapy: complex treatment with the use of vasoprotectives, vitamins, nootropics in a hospital setting; neuroprotective therapy in the form of Retinalamin intramuscular injection. After receiving informed voluntary consent to participate in the study, all patients underwent a comprehensive assessment of the quality of life using universal, specific and psychological questionnaires (SF-36, visual analogue scale, EQ-5D, VFQ-25, GQL-15, VF-14 and HADS) before treatment and 1 month after treatment.Results. The therapy had a positive effect on the quality of life in both groups of patients, however the most pronounced positive dynamics is registered in patients having conservative therapy as compared with those having surgical treatment. The use of valid, reliable questionnaires makes it possible to fully assess the quality of life in glaucoma

Features of filtration of industrial gases from dust with a basalt filter

The scientific and technological progress of the 21st century is inextricably linked with the widespread use of new materials based on mineral and organic fibers. The most widespread in various industries received on the basis of basalt crystalline fibers. These fibers, in terms of their inherent indicators, for example, physical, mechanical and chemical properties, and price indicators, significantly exceed the classical ones, the production technology of which was implemented in industrial conditions at the end of the last century only in Russia and Ukraine and is a priority of these countries. Basalt fibers are well compatible with polymer, metal, ceramic, inorganic and carbon matrices and various fibers when creating hybrid and composite materials. These unique materials outperform their counterparts made of fiberglass and even steel in terms of performance. They are distinguished by durability, reliability, high corrosion resistance, are operational in a wide temperature range (from -275 to 800 °C), and are chemically inert

Remote Prophylaxis of Social and Educational Adaptation of University International Entrants in Total Pandemic

The relevance of the study is due to the trends of the global pandemic, which provoked an extremal transition of all areas of higher education to distance learning, as the only possible way to work with domestic and international entrants and students. In addition, the trends of the pandemic in the current educational environment also determine the special need to develop remote mechanisms for a prophylaxis approach to solving the problems of social and educational adaptation of international entrants – future University students. In this regard, this article is aimed at identifying the features of remote prophylaxis of social and educational adaptation of entrants. The article reveals the transformation of social and educational adaptation of international entrants in the global pandemic; defines the structure and content of remote prophylaxis of social and educational adaptation of international University entrants in the global pandemic. Based on the results of the research, the authors of the article substantiate the prophylaxis model of the educational and software complex for remote prophylaxis of social and educational adaptation of University international entrants. The effectiveness of the model is proved by the results of its use in the process of remote social and educational adaptation of University international entrants in the context of a global pandemic. The materials of the article have practical application and can be useful in the development and implementation of various methods and practices of social and educational adaptation of international entrants – future University students in the context of a global pandemic. It is recommended for University teachers and students, methodologists, curators, Tutors

История развития систем управления беспилотных воздушных судов

Unmanned aircraft find successful applications across various fields and continue to see increasing demand in numerous sectors. Modern flight control systems empower the creation and programming of unmanned vehicles for a diverse range of tasks.(Research purpose) This study aims to retrospectively analyze the evolution of drone control systems, tracing their development from the early unmanned aerial vehicles to the flight controllers of modern multifunctional drones. (Materials and methods) The study employs the historical-analytical method for data collection and processing. This encompasses a thorough examination of original works by both domestic and foreign authors, including literary references, scientific journal articles, monographs, conference materials, museum exhibitions, photographic archives, and open-access software source code. (Results and discussion) The historical process of unmanned aerial vehicle development has led to the emergence of many types of designs that provide better flight performance and new functions through the creation of flight control systems. Designers integrated worldwide aviation expertise and the latest advancements in science, engineering, and technology to enhance unmanned systems. The miniaturization of flight control systems has facilitated the widespread adoption and application of unmanned aerial vehicle in many domains. The introduction of intelligent flight control modes has ensured a high level of autonomy in drone operations. (Conclusions) In the course of the research into the historical development of control systems for unmanned aerial vehicles, block diagrams illustrating these control systems were created. Additionally, a block diagram was constructed outlining the evolution of these systems, with a periodization of individual stages. The block diagram includes nine stages; with the current emphasis primarily directed towards the advancement of intelligent control systems. The findings confirm that the extensive diversification of unmanned aerial vehicle applications and functionalities is closely linked to the continuous development and enhancement of micro-electromechanical systems technologies. The study identifies the key flight controllers that have significantly influenced the enhancement of unmanned aircraft and have outlined potential directions for the future development of flight controllers.Беспилотные воздушные суда успешно применяются и все более востребованы во многих сферах. Современные системы управления полетом позволяют создавать и программировать беспилотные аппараты для выполнения различных задач. (Цель исследования) Провести ретроспективный анализ развития систем управления с времен появления первых беспилотных летательных аппаратов до полетных контроллеров современных многофункциональных дронов. (Материалы и методы) Выполнили сбор и обработку данных с использованием историко-аналитического метода. Исследовали оригинальные работы отечественных и зарубежных авторов по литературным источникам, статьям в научных журналах, монографиям, материалам конференций, экспозиции музеев, фотоматериалов, а также исходного кода программного обеспечения, размещенного в открытом доступе. (Результаты и обсуждение) Исторический процесс развития беспилотных летательных аппаратов привел к появлению множества типов конструкций, обеспечивающих лучшие полетные характеристики и новые функции благодаря созданию систем управления полетом. В конструкцию беспилотных систем внедрялись передовые  достижения науки, техники и технологий, использовался мировой опыт в области теории и практики авиации. Миниатюризация систем управления полетом способствовала массовому распространению беспилотных аппаратов. Появление интеллектуальных режимов управления полетом обеспечило высокую автономность действий беспилотников. (Выводы) В рамках исследования составлены блок-схемы систем управления беспилотными воздушными судами по мере их развития, также составлена блок-схема, обобщающая эволюцию таких систем с периодизацией отдельных этапов. Выявлены девять таких этапов, в текущий момент основным направлением является разработка систем интеллектуального управления. Установили, что активное расширение областей применения и функций беспилотных летательных аппаратов связано с развитием и улучшением технологий микроэлектромеханических систем. Отметили основные полетные контроллеры, оказавшие большое влияние на усовершенствование беспилотных воздушных судов, спрогнозировали возможные перспективы развития полетных контроллеров

Characteristics of the epidemic process of tickborne encephalitis and its peculiarities in a major industrial center of the Middle Urals

The article presents the results of a retrospective analysis of the incidence of tick-borne encephalitis in the city of Yekaterinburg in the period from 2013 to 2017 among different age groups and contingents.В статье представлены результаты ретроспективного анализа заболеваемости клещевым энцефалитом на территории города Екатеринбурга в период с 2013г. по 2017 г. Среди различных возрастных групп населения и контингентов