bluuebunny/crossref_metadata_2025 huggingface dataset:
Possibilities of pharmacological correction of reperfusion injury of ischemic myocardium (review)
Authors: Gurevich Konstantin G. , Urakov Aleksandr L. , Fisher Eugeniy L. , Abzalilov Timer A. , Khairzamanova Kseniya A. , Yagudin Timur A. , Samorodov Aleksandr V.
Published: October 2021

Timely and effective reperfusion in ischemia and reoxygenation in hypoxia of the heart muscle prevent myocardial infarction. Delayed reperfusion and reoxygenation in myocardial ischemia and hypoxia can cause reversible damage in it, which, with a favorable outcome, disappear without a trace. Excessively late reperfusion and reoxygenation inevitably ends with irreversible damage to the myocardium, which is widely known as a myocardial infarction, and which, together with other complications of cardiac ischemia, can cause disability and death of the patient. In recent years, reperfusion injury of the ischemic heart muscle has been recognized as an independent link in the pathogenesis of myocardial infarction. The mechanisms of this link of pathogenesis have been partially studied in experimental conditions. The phenomena of preconditioning and post-conditioning have been discovered, the effects of which are currently determined fairly reliably. After determining the mechanisms of reperfusion injury of the ischemic myocardium, the search and development of pharmacological agents capable of inducing such a phenomenon as cardioprotection began. In parallel, studies of specific microRNAs that claim to be diagnostic markers are being conducted, as well as the search for drugs that affect the level of their expression is being conducted. The information about the achieved successes in this direction is given.
Retina photosensitivity indexes as an objective indicator of expression of psychostimulating effect
Authors: Ovanesov Karen B. , Shabanov Petr D.
Published: October 2021

BACKGROUND: The variety of neurotransmitter systems providing photoreceptor capabilities of the retina is a prerequisite for studying the retinotropic properties of some psychotropic drugs, taking into account their ability to interfere with the work of synapses.
MATERIALS AND METHODS: Given this circumstance, a set of studies was carried out with the participation of volunteers to assess the effect of psychotropic substances with a stimulating (caffeine, piracetam, Bilobil) type of action on the functional state of the retina, recorded by the campimetric method. In the course of the research, the photosensitivity of the retina, its ability to distinguish colors and the speed of the visual-motor reaction were assessed. Such an approach can not only demonstrate the interest of retinal cellular elements in the action of substances, but also broaden the question of the participation of the visual system in the psychopharmacological effect.
RESULTS: The function of the retina was studied both in healthy volunteers and in individuals with organic lesions of the central nervous system, which were often accompanied by emotional disorders, which were identified using special questionnaire tests. It was found that these pathological conditions are accompanied by a limitation of the photosensitivity of the retina of varying severity. These facts can be interpreted in different ways. On the one hand, violations of visual functions can lead to psychoemotional disorders and be a pathogenetic link in their development, and on the other hand, primary disorders of retinal light and color sensitivity can provoke the development of psychopathology. However, regardless of the pharmacological characteristics of the studied drugs that stimulate mental activity, the relationship of their effect with changes in visual function seems obvious, which makes it possible to raise the question of the advisability of taking into account the light and color sensitivity of the retina for a comprehensive assessment of both the mental state and the pharmacodynamics of the drugs, stimulating mental activity.
CONCLUSION: Thus, it is legitimate to conclude that taking into account the light and color sensitivity of the retina can be one of the quantitative criteria for the severity and effectiveness of psychopharmacotherapy.
Effect of the ointment based on benzosulfonate 1-ethyl-3-methyl-4,5-bis(N-methylcarbomoyl) imidazolium on wound healing in thermal skin damage in rats
Authors: Khnychenko Lydmila K. , Piotrovskiy Levon B. , Shabanov Petr D.
Published: October 2021

AIM: Of the investigation was to assess the therapeutic efficacy of ointment based on benzosulfonate 1-ethyl-3-methyl-4,5-bis(N-methylcarbomoyl) imidazolium, an imidazol derivative, on healing of a thermal skin damage (burn wound) in rats.
MATERIALS AND METHODS: In experiments on 150 male rats weighing 180200 g, the wound-healing effect of an ointment based on benzosulfonate 1-ethyl-3-methyl-4,5-bis(N-methylcarbomoyl) imidazolium (IEM-1181) after experimental thermal skin damage was studied. The ointment containing 10% of the compound IEM-1181 was prepared by the pharmacopoeial method based on lanolin. The control was the placebo effect (the basis of the ointment). For comparison, we used Solcoseril (ointment, Solco, Switzerland). Thermal damage to the skin of rats under ether anesthesia was carried out with a special device consisting of a metal plate and a temperature controller. The surface of the plate with a diameter of 1,5 cm was heated for 15 minutes to a temperature of 80С, and then applied to the pre-cut skin of the rats back (from the scapula caudally) for 15 seconds. After 24 hours, the skin of the animals developed damage to the epidermis and partially underlying dermis, corresponding to a grade II burn. The dynamics of changes in the burn wound was evaluated by 5, 10, 15, 20, 30, 40, 45, 50, 60, 70 days along the length of the contour bounding the affected area, using a curvimeter.
RESULTS: It was found that 1-ethyl-3-methyl-4,5-bis(N-methylcarbomoyl) imidazolium benzosulfonate has a wound-healing effect in thermal skin damage in rats. With topical application of the ointment containing the test compound, the time of complete healing of the wound formed at the site of the burn defect was reduced by 30%, healing took place without signs of inflammation, with the formation of an elastic scar.
CONCLUSIONS: Based on the conducted studies, it can be concluded that the ointment based on benzosulfonate 1-ethyl-3-methyl-4,5-bis(N-methylcarbomoyl) it has a wound-healing effect in thermal damage to the skin comparable in terms of the duration and degree of healing of burn defects with Solcoseril and can be the drug of choice for the treatment of grade II burns.
Exploring the Relationship Between Rich Media Communication and Knowledge Sharing in Global Virtual Teams
Authors:   , Baynum James T. , Tzabbar Daniel
Published: October 2021

During 2020, in response to the Covid-19 pandemic, the business world learned it no longer required dedicated workspace for its office employees to perform their assigned functions. Thus, businesses transitioned many employees to a virtual workforce with all needing to learn how to remotely use information and communication systems such as Microsoft Teams and Zoom. The most underutilized feature of these systems was the use of live video. Communication breakdowns in global virtual teams can be a significant problem, resulting in limited knowledge sharing across the team. The goal of this study was to examine the use of rich media as a communication method to share equivocal or complex knowledge within a virtual global team. We proposed that the increased use of rich media (i.e., Live Video Chat) in virtual teams would strengthen the sharing of equivocal knowledge, thus improving cultural intelligence and organizational learning. The setting for the study was the international ecommerce team for a global consumer packaged goods (CPG) manufacturer with offices located in 20 countries. This study used a mixed method longitudinal 10-month field study that began in January 2020 prior to the Covid-19 pandemic and ended in October 2020. We collected and combined quantitative and qualitative data in the analysis to develop a new theory concerning the relationship between communication using rich media and knowledge sharing resulting in increased organizational learning in global virtual teams. Once global virtual teams routinely utilize rich media for communications, they often feel conversations are more informative and feel that something is missing using just verbal communications. The use of live video becomes a habit for many virtual team members after utilizing it for most communications over an extended period. Bonds begin to form across these team members who utilize rich media habitually. These bonds lead to more information being communicated, thus increasing knowledge sharing. Specifically, team members often insist on utilizing live video when discussing equivocal knowledge because observing non-verbal cues is especially needed when communicating complex information. Once this knowledge is shared, it can then be turned into organizational learning. These findings are not specific to only global teams. They can be applied to any team that is conducting work virtually.
The Influence of Reproductive History on Post-Reproductive Mortality: A Case Study of Amish Women
Authors: Stein Rachel E. , Corcoran Katie E. , Perrone Carina , Cossman Jeralynn S.
Published: October 2021

The reproductive choices women make affect their health outcomes; however, the relevance of reproductive history on post-reproductive mortality varies according to the population under study. We examine whether the number of children a woman gives birth to, short birth intervals, late childbearing, having twins, and having children who die young have an influence on maternal mortality among the Amish. We use information from Amish directories to examine reproductive patterns of 228 women in this high fertility group. Our results indicate the patterns typically found for maternal mortality in the general population do not hold in our sample of Amish women. We suggest the mediating role of family and community is integral to understanding the maternal health patterns within the Amish community.
Guía para la planeación e implementación de un sistema de levantamiento artificial basado en los lineamientos PRINCE2 para un campo petrolero en Colombia
Authors: Vargas Delgado Jhoan Sebastian , Gallo Corzo Natalia , Calvete Gonzáles Fernando Enrique , Caballero Márquez José Alonso , Vecino Arenas Carlos Enrique
Published: October 2021

La gestión de proyectos en la industria del petróleo era un tema de poca importancia en el pasado, cuando los recursos se usaban de manera empírica e incontrolada, generando sobrecostos y altas probabilidades de fracasos en los proyectos; estas malas prácticas fueron quedando en el olvido gracias a las nuevas investigaciones tanto en el área técnica, como en la de planeación; en esta última se desarrollaron herramientas para la gestión de proyectos, en la que se destacan PRINCE2 Y PMBOK. Estas dos herramientas tienen el mismo fin, y sus diferencias radican en la manera de abordar la gestión de proyectos, y como estructuran las áreas del conocimiento; es decir, mientras que PRINCE2 Propone una metodología de gestión de proyectos que cobija, las temáticas, la calidad, el cambio, la estructura de los roles del proyecto, los planes, el riesgo y el progreso del proyecto, justificado por un Business Case. Esta metodología consta de 4 elementos: principios, temáticas, procesos y el entorno del proyecto (Montes de Oca Salcedo & Perez, 2014); PMBOK es un documento formal que describe normas, métodos, procesos y practicas establecidas alrededor de la dirección de proyectos, para la cual es necesario la aplicación e integración de 47 procesos, agrupados en los siguientes cinco grupos: iniciación, planificación, ejecución, seguimiento y cierre (Montes de Oca Salcedo & Perez, 2014). Debido a las crisis periódicas que enfrenta la industria petrolera, tiene como opción implementar estas herramientas, con el fin de optimizar recursos, tiempos y procesos, para satisfacer las necesidades del mercado de manera austera y coherente. Este proyecto de investigación buscó proveer a los ingenieros de producción para campos petroleros de una herramienta que les sirva como guía para realizar sus labores de gestión de proyectos, específicamente en el área de los sistemas de levantamiento artificial mediante la metodología europea de gestión de proyectos conocida como PRINCE2 en su versión 2017, con posibilidad de expansión a cualquier tipo de proyectos. Los resultados de la investigación no arrojaron valores concluyentes en cuanto a la eficiencia de la metodología con respecto a otras formas de realizar la gestión de proyectos, pero si reforzaron de forma general que existen diferentes maneras de realizar un proyecto, todas ellas válidas y lo más significativo que tienen en común es el uso de herramientas adecuadas para llevar un control de la gestión de proyectos y todos sus procesos.
Generación de energía eléctrica en sistemas de generación distribuida de pequeña escala usando bioenergía en Nicaragua
Authors: Blanco-Orozco Napoleón Vicente
Published: October 2021

En este artículo se presentan los resultados de un estudio que indagó sobre la posibilidad de generar electricidad en sistemas de generación distribuida utilizando los residuos agrícolas a pequeña escala en la región del oeste de Nicaragua; se utilizaron sistemas de información geográfica (SIG) para evaluar el potencial de energía eléctrica de la biomasa realizando un análisis espacial que permitió determinar la cantidad de residuos disponibles. Además, se obtuvo un modelo conceptual de localización de biocentrales de generación y se calculó el potencial energético teórico disponible. Se utilizó el programa HOMER para simular la generación de energía eléctrica, considerando el potencial energético determinado de las regiones en estudio, y se determinó su posibiliad técnica; no obstante, se comprobó que el costo nivelado de la generación usando biomasa residual tiene un valor mayor al de la red, y, por lo tanto, su empleo para la generación de electricidad no es rentable en las condiciones actuales del mercado energético nicaraguense.
Feasibility analysis of the implementation of geothermal energy in waters associated for the production of hydrocarbons
Authors: Bohórquez-Araque Andrea , Garavito-Reyes Harold
Published: October 2021

The water-cut or ratio of water to oil is about 92% or higher per day in Colombia. In some oil basins like Los Llanos or Putumayo, the water is extracted with relatively high temperatures that are 115 °C, a potential geothermal resource of low-to-medium enthalpy. Usually, this hot water is wasted instead of being used as a resource to generate electricity by the Organic Rankine Cycle (ORC) technology. In this paper, an ORC power plant’s technical and economic feasibility analysis is carried out for an oil field with the characteristics mentioned above. The base case for the technical simulation compiles the characteristics and optimal conditions that allow the ORC plant’s proper performance. A sensitivity analysis of mass flow and temperature allows the best working fluid and optimum mass flows to obtain the ORC plant’s best efficiency. As a result, an ORC module with a geothermal fluid input of 30 kg/s and a power output of 1.5 MW is technically feasible. Economically, this module presents an IRR higher than 17% over 8 years. The production of efficient, favorable, and sustainable energy through the development of co-generation projects such as ORC geothermal plants can contribute to an oil field’s energy demand with positive impacts in a noon carbon tax causation. In addition, this type of project also has social impacts facilitating remote communities to access electricity and clean energy.
Estudio experimental de la estabilidad y propiedades termofísicas de los nanolubricantes PEG 400-CuO, PEG 400-Grafeno y PEG 400-CuO/Grafeno
Authors: Moreno-Mendoza Jaime Felipe , Santa-Marín Juan Felipe , Buitrago-Sierra Robison , Cacua Karen
Published: October 2021

La adición de nanomateriales a los lubricantes convencionales se ha presentado como una alternativa para modificar sus propiedades termofísicas y tribológicas, buscando incrementar su rendimiento. Este estudio presenta los resultados de la evaluación experimental de estabilidad, conductividad térmica y viscosidad dinámica de los nanolubricantes PEG400-CuO, PEG400-Grafeno y PEG400-CuO/Grafeno. Los nanolubricantes se prepararon por el método de dos pasos y se utilizaron dos concentraciones 0.1 y 0.5 % p/p de cada tipo de nanomaterial. Los resultados experimentales mostraron que las dispersiones con menor aglomeración y sedimentación durante el tiempo de evaluación fueron las preparadas con 0.1 % p/p de grafeno. La conductividad térmica de la dispersión PEG400-CuO no presentó diferencias significativas con respecto a la conductividad del PEG400. Sin embargo, la conductividad para las dispersiones PEG400-Grafeno y PEG400-CuO/Grafeno (0.5 % p/p), incrementó hasta un 13.5 % y 5.2 %, respectivamente. La viscosidad dinámica de las dispersiones con una concentración de 0.1 % p/p no presentó cambios significativos con respecto al PEG400, mientras que la viscosidad de la dispersión G-PEG para la concentración de 0.5 % p/p fue superior que la del PEG400 para todas las temperaturas evaluadas.
The concept of a software and analytical complex of the educational process based on ontology and artificial neural networks
Authors:   Ufa State Aviation Technical University, Ufa, Russia, Antonov V.V. , Kulikov G.G. ,   Ufa State Aviation Technical University, Ufa, Russia, Kromina L.A. ,   Ufa State Aviation Technical University, Ufa, Russia, Rodionova L.E. ,   Ufa State Aviation Technical University, Ufa, Russia, Fakhrullina A.R. ,   Ufa State Aviation Technical University, Ufa, Russia, Kharisova Z.I. ,   Ufa Law Institute of the Ministry of Internal Affairs of Russia, Ufa, Russia
Published: October 2021

Effective management of the learning process of additional professional education programs at the university is conditioned by providing unique needs of students as requested by employers in the real sector of the economy in accordance with the selected competencies and areas of training. At the same time, when solving a number of tasks, the algorithm of which is unknown, there are more and more actively developed and implemented systems using artificial neural networks, which allow classifying and analyzing data for making managerial decisions. Based on such widespread use of artificial neural networks, there is an increasing need for systematization of data to improve the performance of software analytical complex processing, storage, search and analysis of data, for the implementation of training programs at all stages of the life cycle, taking into account uncertainty. The developed software-analytical complex is presented on the example of a model of an intelligent system used to control and analyze the acquired competencies of students, built on the basis of an ontological approach, a model of continuous quality improvement, which makes it possible to determine the interaction of business processes, their sequence and performance benchmarks. To implement this theory, a neural network node scheme of a software analytic complex capable of data-driven learning has been developed. The presented scheme of a neural network node assumes the use of a supervised learning algorithm when a training dataset arrives at the input.
Algorithm for assessing and selecting innovations for an enterprise
Authors:   Peter the Great St.Petersburg Polytechnic University, St. Petersburg, Russia, Kudriavtceva A.
Published: October 2021

Currently, innovative technologies of the third and fourth industrial revolutions have a huge impact on the development of industrial enterprises. There is a need to create an approach to decision-making management when introducing innovative technologies. The purpose of the article is to develop an algorithm for assessing innovative technologies by gradually narrowing the area of feasible solutions. A brief analysis of existing methods for assessing innovations is given. It is shown that the existing economic and complex assessments do not allow to give a systematic assessment of the effectiveness of innovations, since new technologies have no experience in the past. The works of J. Rifkin and K. Schwab, as well as the Strategy for the Development of the Information Society in the Russian Federation for 2017-2030 can form the basis for choosing the initial set of innovations, the basis for forming the area of proposed innovations for implementation. To narrow the selected set of innovations, an algorithm for systemic assessment and selection of innovations is proposed. The study, carried out on the basis of the developed algorithm for the shipbuilding enterprise "Admiralteyskie Verfi" in Saint Petersburg, made it possible to evaluate and select the rational composition of innovations for this enterprise.
Ks. Grzegorz Klaja, Msza święta w nadzwyczajnej formie rytu rzymskiego
Authors: Golec Łukasz
Published: October 2021

Artykuł recenzyjny
3D графика в проектировании и дизайне
Authors: Горбачев А.Ю. , Гулякин Д.В.
Published: October 2021

В наши дни строительный рынок, включающий в себя архитектурные и дизайнерские решения, развивается стремительными темпами. Строительная сфера постоянно находится в поиске новых решений для оптимизации рабочих процессов. Объектом данной статьи является трехмерное моделирование, как отличный инструмент для повышения производительности и качества архитектурных и иных продуктов.
Проблемы загрязнения реки Волги
Authors: Мамелина Т.Ю.
Published: October 2021

В данной статье рассматриваются проблемы загрязнения реки Волги.
Построение зон фазовых переходов в приближении малых деформаций
Authors: Шарипова Л.Л.
Published: October 2021

Фазовые границы в упругих телах рассматриваются как поверхности разрыва деформаций. На равновесной границе в дополнении к обычным условиям непрерывности перемещений и напряжений ставится дополнительное термодинамическое условие. Деформации, которые могут сосуществовать на равновесной границе, образуют зону фазовых переходов (ЗФП). Граница зон фазовых переходов играет роль поверхности пластичности в пространстве деформаций. В работе развивается процедура построения в случае малых деформаций. Форма зон фазовых переходов зависит от параметров материала. Используя ЗФП, мы исследуем, как деформационное состояние влияет на тип фазовой границы и локализацию деформаций вследствие фазового перехода.
INCREASING THE PHOTOLUMINESCENCE EFFICIENCY OF CdS NC GROWN IN A GELATINOUS ENVIRONMENT
Authors: Skobeeva V. M. , Smyntyna V. A. , Kiose M. I. , Malushin N. V.
Published: October 2021

The optical and luminescent properties of nanostructures of CdS / ZnS QDs and CdS QDs doped with lithium, obtained by the sol-gel technology in an aqueous solution of gelatin, have been studied. It was determined from the optical absorption spectra of the CdS / ZnS QD nanostructures that the thickness of the shell layer corresponds to the thickness of one ZnS monolayer. The luminescence spectra revealed a significant increase in the intensity of luminescence nanostructure. The absorption spectra of undoped and doped CdS NCs coincide, which indicates that there is no change in the NC size and the absence of the formation of a lithium-sulfur compound. The luminescence spectra of lithium-doped QDs demonstrate an increase in the luminescence intensity, which is associated with the passivation of surface states.
ANTHROPONYMS AS THE BASIC CONSTITUENTS OF THE ONYME SYSTEM
Authors: Chornous O. V.
Published: October 2021

The purpose of the article is to summarize and supplement key information about anthroponyms as basic components of the onymic system by referring to English-language lexicographic works and terminology registers. The object of the study is anthroponyms as the basic components of the onymic system. The subject of the study is the specificity of terminological designation, definition and typology of anthroponyms in Ukrainian and foreign sources. Methods of research are predetermined by the purpose and tasks put in the article. The main ones are comparative analyses, observation method, analysis of the scientific literature, method of classification, descriptive, comparative, and historical methods as well as methods of generalization and abstraction. They make it possible to clarify the concept of anthroponym, to define the specificity of functioning in different resources, to draw conclusions on the typology of anthroponyms. The term «anthroponym» belongs to the category of international and is firmly established in scientific linguistic communication for proper names of people. The chronology of its appearance in foreign and domestic sources varies, but can be most generally described as the second half of the twentieth century. Presence in the most authoritative terminology registers and dictionaries has contributed to popularization of the term «anthroponym» among researches of different countries and has supported its relevance for many decades. The analysed English-speaking and Ukrainian lexicographic works are mostly unanimous in defining anthroponym as a name of a human being, but we find particularly valuable more informative definitions, which contain information on the function and peculiarities of anthroponyms or represent a typology of antroponyms. The anthroponym typologies proposed by the authors vary considerably in quantitative and qualitative parameters, making it difficult to compare them with the corresponding material in Englishlanguage sources. The results of the analyses validate the observations of scholars from different countries that terminological homogeneity does not exist at the international level, which makes translation of terms and comparative research difficult.
TRAILER AS AN ECTOCOMPONENT OF CINEMA DISCOURSE: NEUROLINGVOSEMIOTIC QUALIFICATION OF A LANGUAGE ORGANIZATION
Authors: Shcherbak O. V.
Published: October 2021

The article is devoted to the problem of neurolinguosemiotic qualification of the language organization of trailers as autonomous components of film discourse. The author of this article draws the following conclusions: 1) the trailer belongs to the external components of film discourse, which is due to the presence of semantic and functional correlations with the concept of «advertising»; 2) between the concepts of «trailer text» and «advertising text» the relationship of the so-called approximate identity, because they have identical structural elements, primarily of a reference nature; 3) the text of the trailer is more complex compared to the advertising text, because the linguosemiotic structure of the first introduced a larger number of typological types of signs; 4) the linguosemiotic structure of the advertising text, in which there are dialogic and monologue signs, has the form of meaningfully and formally interconnected remarks of actors who can perform different roles (average consumers of goods / services, professionals, celebrities, etc.), with the final thesis announcer (rarely – titrated on the screen graphically); 5) the linguosemiotic structure of the trailer text is a combination of autonomous multifunctional monologue signs, nonlinearly related to each other by subject (signs of actor, expert, witness and announcer); 6) the vectors of influence of linguosemiotic units of advertising texts and trailer texts do not coincide, because in the former the metaprograms of centrifugal / centripetal motivation, activity, desired modality, comparison focus are actualized, and in the latter – metaprograms of time orientation, breakdown size, way of thinking.
The HEED project: Summary of multi-level cross sectional impact.
Authors:   Coventry University, UK, Al-Kaddo Hajar , Halford Alison ,   Coventry University, UK, Nixon Jonathan ,   Coventry University, UK, Gaura Elena ,   Coventry University, UK
Published: October 2021

Globally, there are 82.4 million displaced people and 26.4 million refugees[i]. An estimated 7 million displaced people in camps have access to electricity for less than four hours a day[ii], making them among the most likely groups left behind in the global drive for improved energy access. In settings that are both precarious economically and politically, humanitarian actors need access to design protocols and pathways for energy products and services that deliver inclusive, affordable, and sustainable energy systems that benefit camp-based populations now and in the future. This briefing paper overviews three impacts that emerged from the project outcomes that can aid short and long-term improved access to energy and sustainability of energy systems for refugees and internally displaced people (IDPs).
The Versatility of Autologous Fat Grafting in Facial Volumetric Restoration
Authors: Patil Tushar B , Yaseen Mohd. , Singh Pankaj , Sharma Girish , Khurram Mohd. Fahud , Mokhale Kunal
Published: October 2021

Deformities in the craniofacial region are of great social and functional importance. Several surgical techniques have been used to treat such pathologies often with high morbidity and lacking the ability to address smaller contour defects. The minimally invasive technique of fat transplantation has evolved rapidly within the last few decades. The objective of this paper is to present the versatility and applicability of fat transplantation in a wide range of contour deformities in the craniofacial region. We share our experiences in treating 24 patients with autoimmune disorders, congenital malformations, and acquired defects.
USE OF MICROWAVE RADIATION FOR SEPARATION OF LIQUID GLASS HEAT INSULATION MATERIALS
Authors: Rymar Tatyana
Published: October 2021

The study of the thermal insulation market of Ukraine showed that the market is dominated by aerated concrete and silicates, which are used as thermal insulation materials at an average density of 300-500 kg / m3. Their disadvantages include high values of water absorption and hygroscopicity, as well as very low flexural strength, because this material does not have elasticity and the use of small bending forces leads to its cracking. Foam glass has a set of operational properties that meet the highest regulatory requirements. Foam glass is the strongest of all effective thermal insulation materials, but this material is fragile. It is sensitive to vibration - induced damage. In addition, the technology of production of foam glass is quite complex and requires high energy consumption, as a consequence, the cost of this material is high. Therefore, it was important to develop thermal insulation material with the appropriate level of performance while reducing production costs. This was achieved by using energy-saving microwave technology to swell liquid glass materials. This technology is based on the simultaneous swelling of the liquid glass granulate and the binder under microwave radiation, which, due to the volumetric heating of the liquid glass composition, allows to obtain a strong monolithic material with a rigid, homogeneous and mostly closed-porous structure. The production of thermal insulation materials is proposed to be carried out on the basis of liquid glass granulate, because the introduction of granules reduces the deformability and shrinkage of the material and prevents its cracking, increases its strength, because the granular material has a certain plastic deformation, reduces water hygroscopicity. granules swell to form a compacted shell, which slows down the absorption kinetics of water and its vapor. The monolithic granules are proposed to be carried out with a binder that foams not only due to the release of water, but also with the help of a gasifier, because this technology will allow uniform distribution of the binder in the intergranular space, thus forming a more homogeneous structure of the material, which has a positive effect on its physical and mechanical characteristics.
CALCULATION OF RELIABILITY OF REINFORCED CONCRETE FLIGHT STRUCTURES
Authors: Kaplin Roman
Published: October 2021

A large number of bridges are operated on the roads of Ukraine. The increase in the intensity and speed of traffic leads to qualitative changes in the operating conditions of bridge structures, which is characterized by a sharp increase in the number of cycles under load of bridge elements, and to the development of damage in them. For trouble-free operation and efficient use of bridge structures it is very important to have reliable estimates of the actual load capacity and resource, taking into account the loads, material quality, nature of the structure. The solution of the problem in this statement is possible only on the basis of the theory of reliability. However, its application to specific assessments of durability and reliability of structures is associated with the solution of a set of issues: the identification of patterns of change of various parameters, the accumulation of reliable and easy to calculate statistics on loads and mechanical characteristics of materials, etc. It is necessary to know that the strength of the material (sample) of the structural element and the structure as a whole are completely different things. The article considers a new design of reinforced concrete girder structure, using perforated metal elements and an effective reinforced concrete slab of the carriageway. On its basis, a computational model in the form of a finite-element model built in the SCAD-Office software package is formed. As a result of calculations, the components of the stress-strain state of the structure are obtained. Based on the obtained results, the reliability of the structure was calculatedunder the influence of modern regulatory loads.
EXPERIMENTAL STUDY OF SHORT STEEL CONCRETE COLUMNS ON STATIC INFLUENCES
Authors: Hammoud Mohammad Tahran , Pcholkin Ruslan
Published: October 2021

The paper considers the issues of planning an experimental tests of samples of short reinforced concrete supports for static effects. The procedure for determining the required number of samples and their preparation for testing is given. To determine the needed amount of supports the Latin square is used. The variable parameters for such type of construction are the followed: concrete class, the thickness of the expanded-exhaust sheet, the size of the cell of the average exhaust sheet, geometric parameters of the support (diameter and height), diameter and pitch of frame and the degree of adhesion of concrete to metal. Experimental samples are presented in three series: round concrete supports(6 pcs.), concrete supports in a mesh holder (6 pcs.) and concrete supports in a mesh holder supported by outer frames (6 pcs.). The height of each support is about 1000mm, the diameter is 450 mm. Based on the presented methodology, 18 prototypes were prepared for testing, which were made on the construction site of "Avantazh" ICC. For convenience of production of supports concreting is executed in a disposable cardboard framework. The diameter of the mesh holder is 400 mm, thus, the protective layer of concrete is 25 mm. The connection of the holder is made by butt welding without overlays. The frames are made of Ø12A400C reinforcement bars of periodic profile. Before conducting a series of experimental studies, standard tests of structural materials were performed, in particular, determination of the cubic strength of concrete. Simultaneously with the testing of standard samples of cubes, the establishment of the actual concrete classes of the test samples was performed using a non destructive test with the ONYX-2.5 device. Together with determining the concrete classes, geometrical characteristics of samples were defined. A P-500 hydraulic press for testing of building structures is used as the main power plant. The loading of the samples is planned to be realized stepwise through two headers in the form of steel disks till the moment of distruction.
Improving the Oil-Free Scroll Vacuum Pump Efficiency
Authors: Tyurin A.V. , Burmistrov A.V. , Salikeev S.I. , Raykov A.A.
Published: October 2021

Improving the quality of manufactured products involves reducing any contaminants introduced into the vacuum chamber from the pumping means. Scroll vacuum pumps, which are constantly developing, are the most promising for oil-free pumping. Relying on the mathematical model developed, we examined the influence of the main parameters of the scroll on the scroll pump performance, in particular, the influence of the radius of the base circle on the pumping speed and the power consumption of the scroll pump at fixed and variable radii of the pump housing bore. Maintaining the overall dimensions of the pump with an increase in the radius of the base circle proves to lead to an exponential increase in the limiting residual pressure and a decrease in energy efficiency due to a decrease in the number of scroll wraps and, as a consequence, an increase in backflows. For the pump under consideration, when the base circle radius is more than 3.5 mm, the limiting residual pressure exceeds 10 Pa, and the vacuum scroll pump can no longer be a full-fledged oil-free alternative to oil-sealed vacuum pumps. With an increase in the radius of the base circle, while maintaining the number of scroll wraps, the radius of curvature of the outer wraps will increase; this results in the backflow decrease, leading to a decrease, albeit insignificant, in the limiting residual pressure. The energy efficiency of the scroll pump decreases with decreasing pump inlet pressure. The above dependencies make it possible to choose the optimal geometry of the scrolls, based on the specific conditions for which the vacuum scroll pump is designed
Optimisation Method for Multistage Compressors
Authors: Goryachkin E.S. , Matveev V.N. , Popov G.M. , Baturin O.V. , Novikova Yu.D.
Published: October 2021

The paper presents an algorithm for seeking an optimal blade configuration for multistage axial-flow compressors. The primary tool behind the algorithm is 3D CFD simulation, augmented by commercial optimisation software. The core of the algorithm involves feeding an initial data vector to the parametric simulation module so as to form a "new" blade geometry, which is then transferred to 3D computational software. The results obtained are further processed in a program that implements the algorithm for seeking the optimum and forms a new input data vector to achieve the set goal. We present a method of parametrically simulation the blade shape, implemented in a software package, making it possible to describe the shape of the compressor blade profiles using a minimum number of variables and to automatically change the shape in the optimisation cycle. The algorithm developed allows the main parameters of compressor operation (efficiency, pressure ratio, air flow rate, etc.) to be improved by correcting the profile shape and relative position of the blades. The algorithm takes into account various possible constraints. We used the method developed to solve practical problems of optimising multistage axial compressors of gas turbine engines for various purposes, with the number of compressor stages ranging from 3 to 15. As a result, the efficiency, pressure ratio and stability margin of gas turbine engines were increased
Thermal State of an Aircraft Aerofoil in a High-Velocity Air Flow
Authors: Aliev Az.A. , Burkov A.S. , Tovstonog V.A. , Tomak V.I. , Yagodnikov D.A.
Published: October 2021

One of the features of high-velocity atmospheric aircraft is the presence of thin aerofoils with edges characterised by a small blunt radius, subjected to high-temperature aerodynamic heating at temperatures of up to 2000 -- 2500 °C. In order to ensure correct operation of both the power plant producing thrust in such vehicles, assumed to be a supersonic combustion ramjet, and respective aerodynamic controls, the components subjected to high-velocity air flows must retain their geometric stability. A way to ensure their performance is to use methods and means of thermal protection, as well as materials that are resistant to high temperatures in an oxidising atmosphere, while one of the promising trends is employing refractory oxide materials such as oxides of aluminium, zirconium and hafnium. Since this class of materials has low thermal conductivity, large temperature gradients develop in the vicinity of the surface being heated, resulting in temperature stresses, all of which designers should take into account. We analysed the temperature state in a model of an acute zirconium oxide wedge featuring a small blunt radius, subjected to a high-velocity air flow. To reduce the edge temperature and temperature gradients, we propose a design solution implemented as a thermally conductive core lined with a thin layer of zirconium oxide. We consider using aluminium oxide and hafnium boride as core materials
Without a compass: Salonikan Jews in Nazi Concentration Camps and later
Authors: Zezza Stefania
Published: October 2021

During the Holocaust, the largest Sephardi community in the world located in Saloniki was almost completely destroyed. Despite their limited number in comparison with that of Ashkenazi Jews, the Salonikan Jews, initially deported to Auschwitz Birkenau and Bergen Belsen, went through all the hardest experiences and were sent to many camps in occupied Poland, and in Germany. This article explores, using archival documents and the testimonies, the geographical directions of their deportations. It also analyses historical coordinates and the Salonikan Jews’ characteristics which affected their destinations and the itinerary with which they were forced to cope.
New trends in the changes of administrative boundaries in Poland
Authors: Kociuba Dagmara
Published: October 2021

The objective of the study is to determine the leading trends in changing administrative boundaries in Poland. Based on 194 Regulations of the Council of Ministers concerning the changes of boundaries and granting city status, which covered a total of 1,383.8 sq. km, multidimensional analyses for the years 2010–2020 were conducted, and their results were referred to territorial reforms in Europe and Poland. The analyses provided the basis for selecting the leading trends, including: (1) the ‘new wave’ of the restitution of city status (from 2018 in the new fast-track mode), resulting in quantitative changes within 3rd-tier units, (2) a significant increase in the area of cities and city counties primarily caused by annexations in suburban zones and establishing new cities, and (3) the politicisation of the process of changing boundaries, especially in the years preceding local government elections. The trend of unit fragmentation observed in the 1990s has disappeared. The initiators of the changes of administrative boundaries are still predominantly local elites and rarely the inhabitants of communes.
Molecular Characterization of the Coding Region and 5’ UTR of HSP70 Gene in Indian Riverine Buffalo Breeds
Authors: Singh Ravinder , Gurao Ankita , Mishra S.K. , Niranjan S.K. , Vohra Vikas , Mukesh Manishi , Rajesh C. , Kataria R.S.
Published: October 2021

Background: HSP70 (Heat Shock Protein 70), plays a crucial role in nascent protein folding; the added challenges due to physiological factors demand stringent role-playing of such chaperones for tropical livestock such as water buffalo (Bubalus bubalis). Therefore to evaluate the variations at nucleotide level in HSP70 that could potentially unravel the molecular basis of thermal adaptation in the riverine buffalo breeds of India, the current study was targeted to sequence the CDS (Coding Sequence) and UTR (Untranslated Region) of the gene in a panel of 16 Indian riverine buffalo breeds. Methods: Blood samples were collected and genomic DNA was isolated followed by PCR standardized for the amplification of different fragments of the HSP70 gene using different sets of primer pairs covering the entire coding region and 5’UTR. Multiple amplicons generated to cover the entire gene were sequenced. Sequences were further analyzed manually for the identification of heterozygous animals to detect the polymorphic nucleotide sites and variation between breeds documented. Result: The HSP70 results suggest, the highly conserved nature of gene in buffalo. The only non-synonymous polymorphic site was found in the Toda buffalo breed (g.SNPC greater than T at position 14), resulting in amino acid change 5M greater than T. A total of 7 polymorphic sites were found in the 5’UTR flanking region. Additionally, two insertion/deletions (INDEL) of 30 and 1 nucleotide length were found in the 5’UTR.
Identification of Risk Factors for Diabetes Disability Among Bangladeshi Adults
Authors: KC Bhuyan
Published: October 2021

The paper was to throw some light on the risk factors for diabetes disability among Bangladeshi adults of 18 years and above residing in both urban and rural areas. In investigating the adults, it was decited to cover 50.1% males and 49.9% females to maintain the national level of sex ratio in the sample. The respondents were interviewed when they were visiting some diagnostic centres in urban and semi-urban areas. The percentage of diabetic respondents included in the sample was 67% and 25.5% of them were suffering for 10 years and above, 6.4% were disable against 4.8% total disable respondents in the sample, and obese adults were 30.2%. Diabetic disable adults in the sample were 4.3%. The most responsible variable for diabetes disability was obesity followed by longer duration of diabetes, sedentary activity, smoking habit, being housewife, being married, etc. These variables were identified on the basis of risk ratio and correlation coefficients of variables and discriminant function scores. Beside these variables, rural people, Muslims, adults of ages 40-50 years, illiterate people had more risk of facing the problem of diabetes disability.
25 Years of HOW: A Celebration of Language Teaching and Learning
Authors: Sánchez-Solarte Ana Clara
Published: October 2021

This article overviews the major themes and pedagogical developments that have emerged via the academic endeavors of practitioners and researchers in the last 30 years, while also touching on how my work adheres to these developments. The document starts with a brief historical background on the establishment of HOW as a resource for the academic community.

The next part of the article deals with the theoretical tenets that have influenced my published works. One of those perspectives is the post-method pedagogy, which acknowledges the limitations of attempting to determine what the “best” language teaching method is for everyone, and proposes three parameters to guide language teaching and learning. The next perspective is the psychology of language learning, particularly positive psychology, which is a field that adds balance to the study of negative emotions in the classroom and can be the basis for interventions that aim at enhancing the language learning process. The final construct discussed in the article is metacognition, which refers to how language teachers adapt their mental processes and behaviors to the emerging demands of their context. The article concludes highlighting a number of topics that were relevant three decades ago and that will likely keep their relevance in the future: the complexity of education, the dynamic nature of context and meaning, and the examination of the role of context in the L2 teaching/learning processes, to name only three.
Criticality and English Language Education: An Autoethnographic Journey
Authors: Mora Raúl Alberto
Published: October 2021

This article, relying on a series of epiphanies throughout my journey as a researcher and scholar-activist, shares my relationship with criticality and how it has guided my research and teaching agendas. I share how critical theories have informed my main research areas and the questions and issues I have raised in my own work. The article also discusses my main scholarly influences and how my interactions with varied literature, mentors, and colleagues have shaped my own criticality. I also take a moment to reflect on how this journey has helped the field of language education in Colombia to continue with the evolution toward stronger critical and social justice-oriented frameworks and how I see my changing positionality as mentor and ally of colleagues and the future cadres of scholars moving forward.