bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study of Power Turbine with Adjustable Nozzle Guide Vanes
Authors: Troitskiy N.I. , Molyakov V.D.
Published: August 2021

The article discusses the results of experimental research of the impact of the law of profiling along the stage height on the characteristics of a turbine with an adjustable nozzle guide vanes. The results of the design study have been confirmed, taking into account meridional streamline bending. It is shown that in the stage profiled according to the law of constancy of the product of the radius of the flow path and the tangent of the blade angle the degree of reactivity in the root sections of the blades increases provided that the degree of reactivity at the middle diameter is the same as in a turbine with a constant blade angle, which leads to an increase in the turbine efficiency in modes with a reduced angle of arrangement of blades of the adjustable nozzle guide vanes and the degree of pressure reduction.
ФОРМИРОВАНИЕ КОММУНИКАЦИОННЫХ НАВЫКОВ ПУТЕМ ВНЕДРЕНИЯ КАРТЫ РАЗВИТИЯ SOFT-SKILLS В ПРОФЕССИОНАЛЬНОМ ОБРАЗОВАНИИ IT-СПЕЦИАЛИСТОВ
Authors: Рыжкова Марина Вячеславовна , Шефер Елизавета Олеговна , Кондратьева Анастасия Александровна , Соболева Екатерина Николаевна
Published: August 2021

Актуальность исследования заключается в том, что в современных условиях для работодателей большое значение имеет минимизация затрат на адаптацию выпускников системы высшего профессионального образования. В процессе обучения студенты приобретают знания, умения и навыки, но при этом у них формируется определенный тип поведения, препятствующий достижению качественного результата в определённый срок. Это возникает благодаря коммуникационному барьеру, появляющемуся в ходе адаптации молодого сотрудника на рабочем месте. Цель работы: выявить недостающие компетенции в профессиональном образовании IT-специалистов и разработать карту их развития в проекте «Академия Умн ый Мир » (томская IT-компан ия «Умный Мир »). Методы: анализ конкурентной среды рынка профессионального образования IT-специалистов, метод интегральных оценок для анализа акселерационных программ томских работодателей, карта компетенций. Результаты исследования потребностей работодателей и трендов в профессиональном образовании IT-специалистов позволили составить карту необходимых компетенций. Основными недостающими в образовании компетенциями стали «мягкие навыки», особенно это касается способности работать в команде. Эти компетенции являются универсальными для начинающих специалистов и выпускников вузов, а их развитие представляет собой интерес для IT-сферы и бизнеса. Составленная карта компетенций позволит томским IT-компаниям подбирать сотрудников и влиять на их дальнейшее профессиональное развитие, а для университетов данная карта является ориентировочным профилем выпускника, подготовка которого увеличит востребованность у работодателя. В итоге создаются условия для преодоления структурного разрыва между потребностями работодателей и профессиональным образованием IT-специалистов.
ДИСТАНЦИОННОЕ ОБУЧЕНИЕ И МОДЕРНИЗАЦИЯ ОБРАЗОВАНИЯ – ТУПИК ИЛИ ВОЗМОЖНОСТЬ?
Authors: Левин Семен Михайлович
Published: August 2021

В статье рассматриваются вопросы дистанционного обучения с позиции реализации студентоцентрированного образовательного процесса – одного из принципов Болонской декларации. Актуальность исследований в этой области обусловлена стремительным ростом числа вузов, реализующих дистанционные образовательные программы, который происходит на фоне модернизации системы высшего образования в соответствии с требованиями Болонского процесса. Цель ­­­­­– изучение учебного процесса, протекающего в электронной образовательной среде, выявление проблемных аспектов и поиск эффективных решений для реализации дистанционного обучения на основе современных педагогических концепций. В этой области выявлен ряд проблем, связанных с реформой высшего образования, соблюдения образовательных стандартов, а также развитием дистанционного образования как формы подготовки квалифицированных специалистов. К указанным проблемам отнесены низкая познавательная самостоятельность студентов, смещение акцента мотивации преподавателей в сторону научно-исследовательской деятельности, профессиональная неподготовленность последних для эффективного применения современных педагогических технологий и инструментов электронных образовательных систем, а также недостаточная наполненность требуемыми элементами самих систем управления обучением. Результаты работы отражены в конкретных рекомендациях по решению проблем в части, регулируемой высшими учебными заведениями: развитие познавательной самостоятельности студентов через использование соответствующих педагогических подходов, изменение системы мотивации профессорско-преподавательского состава, направленной на применение в образовательном процессе современных педагогических технологий, а также формирование компетенций в области электронных образовательных инструментов.
Hongos psilocibios como patrimonio biocultural y su potencial para el desarrollo local en la Sierra Mazateca de Oaxaca
Authors: Hannon Ovies Diego
Published: August 2021

Pese al papel fundamental que desempeñan los hongos psilocibios en la medicina tradicional indígena de México desde tiempos inmemoriales, su desatención institucional y su condición de ilegalidad imposibilita el despliegue de esquemas de conservación, investigación y aprovechamiento de este recurso biocultural endógeno. Partiendo del paradigma conceptual de la bioculturalidad y desde el enfoque socioterritorial del desarrollo local, el presente artículo plantea una discusión sobre el potencial de los hongos psilocibios para constituirse como patrimonio biocultural de México y favorecer el desarrollo local en la Sierra Mazateca de Oaxaca. El artículo se fundamenta metodológicamente en una investigación documental y etnográfica para destacar el valor biocultural y el potencial terapéutico de los hongos psilocibios a fin de proponer su reconocimiento institucional y científico en el ámbito nacional. Los resultados indican que la comunidad mazateca reconoce el potencial endógeno de los hongos psilocibios y favorece su uso turístico. No obstante, la ausencia de capacidades comunitarias para la cooperación cohesiva inhibe la articulación de estrategias regionales de conservación y desarrollo. La reflexión final propone que la dinamización de las plantas visionarias por medio de esquemas de conservación biocultural y aprovechamiento turístico responsable puede contribuir a la mitigación de la pobreza en regiones indígenas.
Ciberespacio y mundo virtuales: el caso de Active Worlds.
Authors: Infantas Barbachán Iván
Published: August 2021

Las nuevas tecnologías de la información y de la comunicación, NTIC, básicamente Internet, alteran las formas de interacción social, gracias a las grandes posibilidades que actualmente ofrece el ciberespacio a las sociedades. A pesar de existir todavía una diferenciación de uso y de accesibilidad al ciberespacio, es probable que las personas, que tienen acceso a las tecnologías digitales, sientan que pueden estar ‘aquí’ y ‘allá’ de forma instantánea, lo cual causa —quizá sin percatarse, — alteraciones en las nociones tradicionales del espacio tiempo. Una de las tantas formas de comprender el nuevo espacio emergente, es decir el ciberespacio, es mediante el estudio de los Mundos Virtuales, entre los cuales se destacan los sub-mundos virtuales de Active Worlds.
Desarrollo y retos de la participación de la sociedad civil en los procesos de Ordenación Territorial
Authors: Rentería Rodríguez María Teresa
Published: August 2021

La organización de la sociedad civil, como fenómeno global, es relativamente nueva y en los países en vías de desarrollo muy poco ha tenido que ver con los procesos de desarrollo y gobernabilidad, menos aún con los de ordenación territorial, como actor, cuyas decisiones incidieran en esos procesos, pues el Estado había tenido –y sigue teniendo– una participación casi exclusiva en la configuración de la realidad política, económica y social, aunque la empresa también ha tenido un peso importante en ello. Este ensayo se centra en la sociedad civil, la cual tradicionalmente ha quedado relegada a un plano irrelevante en muchos aspectos que le afectan de modo directo, como es la ordenación del territorio, la educación y la salud, entre otros aspectos. El trabajo se divide en cuatro partes: introducción, génesis y desarrollo de la participación de la sociedad civil, conexión de ésta con los procesos de ordenación territorial y retos de la participación de la sociedad civil.
El ordenamiento territorial en Colombia a través del tiempo
Authors: Villamil Pérez Mauricio
Published: August 2021

Comprender la situación de Colombia en materia de ordenamiento, considerando que este es un país agobiado por una violencia histórica enfocada hacia el control y dominio territorial, ya sea por afán de lucro o simplemente por control político, es un proceso que debe realizarse consustancialmente con los hechos históricos que la acción humana desarrolla en su afán de adaptabilidad territorial, y que a través del tiempo lo construye social, política y culturalmente en la búsqueda de un modelo equilibrado.
Cambios espaciales y su influencia en la configuración territorial de Aguazul y Tauramena 1974–2005
Authors: Devia Acosta Claudia Yolima
Published: August 2021

El estudio aborda los principales cambios espaciales que influyen en la configuración territorial de los municipios de Aguazul y Tauramena (Casanare, Colombia) entre 1974y 2005. Se trata de un trabajo descriptivo de perspectiva temporal, que aborda los cambios visibles y los factores económicos, demográficos y sociales que influyeron en ellos. Se recurre auna periodización basada en el cambio en las actividades económicas y en los cambios político-administrativos en la configuración territorial de estos municipios. El artículo centra el análisis en la influencia de la actividad petrolera en la región, y en su capacidad directa e indirecta de transformar el territorio.
Dinámicas socio-espaciales por causa del fenómeno de la Niña en el valle de Ubaté y Chiquinquirá en el primer semestre del 2011
Authors: Torres Castro Marcela
Published: August 2021

Este artículo expone las dinámicas socio-espaciales ocurridas en el valle de Ubaté y Chiquinquirá por el fenómeno de la Niña en la actividad lechera durante el primer semestre del 2011. Se llevó a cabo una caracterización biofísica del valle de Ubaté y Chiquinquirá y se identificaron las dinámicas socio-espaciales a partir de las relaciones construidas alrededor de la producción primaria, transporte y acopio de leche, como procesos vinculados a este espacio rural. Con base en esta información, se analizaron las dinámicas socio-espaciales que se vieron afectadas en esta región conocida por tener una de las mejores tierras ganaderas y productoras de leche en el país. Los resultados indican que en esta zona el fenómeno de la Niña ha influido de manera significativa en las dinámicas socio-espaciales alrededor de la actividad ganadera, afectando a la población dependiente, a la producción y el uso del suelo.
El ecoturismo. Un modo nuevo de ver el Turismo
Authors: Africano Castillo Ana María
Published: August 2021

En nuestro bello país, Colombia, el turismo convencional ha prevalecido por muchos años, en muchos casos solamente disfrutamos del paisaje artificial a locual estamos dejando a un lado la manera de apreciar los recursos naturales, sentirnos parte del páramo, del bosque, de las montañas, de las bahías; sentir elagua, las plantas, la tierra y toda esa riqueza natural que es la vida de nuestro planeta. Infortunadamente, en años recientes todos aquellos cambios sociales,económicos, y ambientales entre ellos la grave contaminación que afecta nuestro entorno ha ido haciendo menos atractiva esta actividad. Por lo tanto, resulta indispensable respetar los elementos que forman parte del paisaje.
La naranja atómica: escribir para divulgar
Authors: Hernández Y , Higuera S
Published: August 2021

Este artículo da cuenta dinámica y los resultados de un trabajo divulgativo, cuyo propósito se ha centrado en la utilización de la radio como una herramienta para difundir ciencia; en este sentido se considera como un instrumento de constante aprendizaje para los radioescuchas interesados, así como un elemento parahacer accesible el conocimiento científico a una población muy diversa. Igualmente, se presentan una serie de resultados acerca del grado de interacción que este método de difusión de la física ha tenido en la comunidad boyacense.
La sociología del turismo, "un reto por asumir"
Authors: Rodríguez Cortés Diana Carolina
Published: August 2021

Teniendo el turismo un carácter multidisciplinario, interdisciplinario y transdisciplinario, se hace necesario estudiarlo con la rigurosidad que esto requiere, por tal razón se plantea indispensable investigar esta temática desde todas sus múltiples perspectivas, habiéndose hecho ya estudios extensos sobre varios tipos de disciplinas que el turismo abarca, pero haciéndose evidente una carencia desde lo sociológico
Observatorio agroindustrial "lugar de encuentro de empresas boyacenses"
Authors: Silva Ruiz Herica
Published: August 2021

El Observatorio Agroindustrial pretende ser un semillero de investigación que apoyará permanentemente al grupo de investigación IDEAS "INVESTIGADORES PARA EL DESARROLLO EMPRESARIAL y AGROINDUSTRIAL SOSTENIBLE" unido a las diferentes carreras relacionadas con el sector agroindustrial, procurando obtener datos reales y de calidad, que a su vez sirvan de base para las empresas agroindustriales del departamento de Boyacá y su continuo crecimiento económico, laboral y social, éste además de ser un espacio investigativo, será un lugar de encuentro de las diferentes empresas del sector, inicialmente del departamento de Boyacá en donde se complementarán y pactarán alianzas comerciales, brindando en el momento oportuno lo que cada una de ellas necesita para desarrollarse plenamente y darse a conocer al mercado global, elevando así el nivel competitivo y productivo de las compañ1as agroindustriales y por ende el nivel de vida de los ciudadanos del departamento de Boyacá.
Estudio a las imágenes religiosas de Santa Clara la Real: San Gabriel
Authors: Colmenares Elkin
Published: August 2021

El presente trabajo es el resultado de un proceso de investigación que tuvo origen en una clase de artes plásticas. Su fin tiene que ver con un ejercicio en el cual se abordaron temas relacionados con la ciudad de Tunja, más específicamente con vínculo a la iglesia Santa Clara la Real. El estudio se enfocó en una pintura del arcángel San Gabriel, dicho objeto fue analizado desde dos visiones o conceptos: el tautológico y de creencia.Palabras clave: Santa Clara la Real, creencia, tautología, imágenes, parodia, mass media, reproductividad.
La estrategia de BPO&O (tercerización), ¿una opción de servicios para colombia?
Authors: Rojas Camilo
Published: August 2021

El artículo muestra el significado, antecedentes e importancia de la tercerización o BPO&,O, traducidos en menores costos y mayor eficiencia para las empresas. Cuál es su importancia en los países asiáticos, europeos y latinoamericanos. Finaliza haciendo una breve presentación de la tercerización en Colombia y, particularmente, en Boyacá. Palabras clave: Boyacá, BPO&,O, Colombia, desventajas, estrategia, empresario, países tercerizadores, tercerización, ventajas.
Microscopia de fuerza atómica: técnica, equipo y aplicaciones
Authors: Sandoval Santiago
Published: August 2021

Uno de los principales métodos de caracterización de superficies y películas delgadas es el de la microscopía de fuerza atómica, el cual permite obtener la morfología de la superficie desde el rango de los micrómetros y armstrong donde pueden hacerse medidas de tamaño de grano y rugosidad de la superficie, aún bajo ciertas condiciones  especiales, el nivel atómico de especial interés en el campo de la nanotecnología. Se hace una introducción a la técnica, se describe su electrónica y funcionamiento. Se amplía el tema de los "cantilevers" y las puntas del equipo, describiendo su estructura, la resolución y la curva de fuerzas debida a las interatómicas implicadas en especial la fuerza de Vander Waals. También se describen algunas de las aplicaciones de la microscopía de fuerza atómica, que permiten obtener mayor información de la superficie, tales como sus propiedades magnéticas, eléctricas y su dureza. Palabras clave: microscopía de fuerza atómica, cantiléver, punta AFM, nanotecnología.
Nuevos estudios de citogenética convencional al servicio de pacientes del departamento de Boyacá.
Authors: Vergara Estupiñán Edwin Javier , Forero Castro Ruth Maribel
Published: August 2021

La citogenética convencional permite diagnosticar anomalías cromosómicas numéricas y estructurales, ya que aportan en el diagnóstico de múltiples patologías. Este ensayo pretende rescatar los estudios de citogenética convencional que se han puesto al servicio de la población boyacense y que han sido adelantados por el Grupo de Investigación en Genética y Biología Molecular (GEBIMOL). Estudios interdisciplinarios adelantados por Sánchez y Corredor (2010) y Vergara (2011) abordaron citogenéticamente la esquizofrenia y el síndrome de Down respectivamente, beneficiando a 25 pacientes, pues los diagnósticos e interconsultas no tuvieron ningún costo para dichos pacientes, además se logró fortalecer el estudio de estas patologías desde la citogenética en el departamento

de Boyacá.
Langues et littératures de la « vieille Europe » dans les universités américaines : un état des lieux
Authors: Canovas Frédéric
Published: August 2021

Having completed his literature studies in France, the author of this essay started teaching in the United States in 1988 in both private and public universities. This essay is the result of his observations made as a teacher, a scholar and an administrator on the evolution and the shifts occurred in departments of romance languages these past thirty years. Since the 1980s, neoliberal politics and repetitive economic crisis encouraged states to drastically reduce their financial support to public universities forcing them to turn to other forms of financing including juicy contracts with Asian and the Middle Eastern countries where economic development generates surplus. This essay studies the consequences on departments of Romance languages of a university policy conducted in favor of the development of Chinese and Arabic languages, as well as sciences instead of European languages and the humanities in general, and shows how the preference given to those newly developing languages has weaken departments of European studies as a result.
Vue d’ensemble sur la philologie en tant que discipline d’enseignement en Roumanie (1969–2017)
Authors: Constantinescu Muguraş , Hăisan Daniela
Published: August 2021

In the present paper, we offer a glimpse at a classic, canonical book on philology (namely Initiation à la philologie française, by N.N. Condeescu, published in 1969) and at its (ir)relevance against the backdrop of the evolution of philological studies from the 1970s to the language and literature studies of the new millennium. The article is therefore a reflection on philology (a term as vague in Romanian as it is in French) and on its scope of application in Romania.
Methods of teaching weapon training: adaptation to the professional activity conditions
Authors: Paramonov Andrey V. , Plotnikova Tatiana V.
Published: August 2021

The ability to shoot for future law enforcement officers is an important and competitively oriented skill for entering, building a career in the law enforcement system, since weapon training is part of the professionally applied combat and physical training of employees of state de-partmental structures. Training and improvement of shooting skills is carried out within the framework of conducting weapon training classes. We consider the methods of teaching weapon training for students of specialty 40.05.01 “Legal Support of National Security” on the basis of a civil university – Derzhavin Tambov State University. A weapon training session is the foundation that lays both primary shooting skills and, subsequently, a platform for improving and honing skills. Most of the weapon training classes are not theoretical, but practical. The main methods of teaching both theoretical and practical lessons in weapon training are considered. However, the existing methods of teaching and learning shooting skills does not meet modern practical challenges. Currently, practical exercises for conducting weapon training classes, which are regulated and recommended by the relevant regulatory legal acts (not only general methodic recommendations for training students in civilian universities, but also orders and instructions from specialized educational institutions of law enforcement agencies) do not correspond to the real conditions and situations of the use of firearms. In particular, it is worth considering the fact that calm and quiet conditions for firing a shot are only opportunities in a practical lesson. In real life, weapons have to be used in extreme situations and in conditions of a difficult mental state. In this regard, there is a methodic adaptation of the teaching of the discipline of weapon training to the modern practical realities of the trafficking and use of weapons.
On the issues of influence of the Armenian and Georgian diasporas of Kizlyar on the economic, cultural and educational life of the city in the first half of the 19th century
Authors: Gazieva Abidat A. , Gasanov Magomed M.
Published: August 2021

The work examines the socio-economic and cultural development of Kizlyar and the adjacent villages in the context of the national policy pursued in the city by the tsarist administration in the period 20-60s of 19th century. The main research method used in the work is the narrative method, as well as adherence to the principles of comprehensiveness and consistency of historical knowledge of the research issue. Archival materials and available literature are used as the main research base. We make an attempt, on the basis of available sources and literature, a detailed analysis of the contribution of the Armenian and Georgian diasporas to the economic and educa-tional activities in the Kizlyar region. We show the leading role of the Armenian and Georgian merchants in the process of involving the region (a number of cities in the North-Eastern Cauca-sus) into the trade and economic space of the Russian Empire. The work reveals the trade and economic specialization of the city’s diasporas, which later became the basis of industrial production in Kizlyar. We also highlight the issue of educational activities of the Armenian diaspora, the emergence of the first private schools founded by the Armenian community of the city of Kizlyar. The work shows, using the example of the activities of representatives of the Armenian and Georgian diasporas, the process of civil colonization of the region – as the main method for bringing closer relations between the centre and the outskirts.
Tambov Governorate Library and the development of librarianship in Tambov in 1920–1937
Authors: Zhitin Ruslan M. , Topilsky Aleksey G. , Patrina Lyudmila N.
Published: August 2021

We consider the stage of development of library business in the Tambov region during the formation of Soviet power. We describe the systematization in the funds of state and trade union libraries of books nationalized from private collections, the reconstruction and expansion of the network of local (district and sub-district) libraries, reading rooms, mobile libraries that contributed to educational work among the population of the region. The activities of the new government on administrative regulation of the system of relations between libraries, libraries with other cultural and educational institutions and local authorities are studied. The work shows the activities of the management of the Central Governorate Library (CGL) to improve labor discipline, the level of education and political literacy of librarians. We describe the management of the Central Governorate Library and its policy of hiring employees, the fight against the manifestation of per-sonal conflicts of librarians in the workplace, the theft of books and careless attitude towards them. Mass events that were practiced along with the distribution of books in the library are considered: meetings of political education, excursions for pioneer children, atheistic anti-religious evenings. We describe the creation of children’s and youth departments that contributed to the development of education. It is shown that the library staff created a developed system of libraries in the region, which allowed to meet the cultural needs of the population.
The use of project methods in foreign language teaching to students of linguistic programmes
Authors: Nikolaenko Irina S. , Pribytkova Anna A. , Pustovalova Olga V.
Published: August 2021

The 2019 coronavirus pandemic had a significant impact on the development of new innovative methods and forms of foreign language teaching that can organize distance or blended learning of a foreign language and continue to develop students’ subcompetencies that are part of a foreign language communicative competence. The project method is one of the problem-based teaching methods aimed at enhancing the speech-thinking activity of students in the process of completing a number of tasks. Its unique characteristic lies in the fact that this method can be used both in classroom and in blended or distance learning. However, despite the fact that in the methodic literature there are many studies devoted to the development of specific methods of foreign language teaching (aspects of language and types of speech activity) through information and communication technologies, the researchers did not come to a consensus on what stages the project methods should include. In our work, based on the analysis of the methodic literature, we identify eight stages of organizing the project work of linguistic university students. These include: 1) goal setting; 2) discussion of technical issues of organizing design work; 3) search, collection and processing of the necessary information on the Internet; 4) work on the project; 5) feedback from the teacher and students; 6) work to improve the draft version of the project; 7) presentation of the project; 8) project evaluation. An analysis of some well-known methodic studies devoted to the organization of project work of pupils and students is given, as well as a detailed description of stages of teaching.
Amur Region as a territory of humanitarian cooperation
Authors: Yan Meiwei
Published: August 2021

The study is devoted to the development of humanitarian cooperation between the regions of the two states – the Amur Region (Russian Federation) and Heilongjiang province (People’s Republic of China). We analyze the development of humanitarian relations between these neighbouring territories from the late 1980s to the present. The main normative and legal acts of the interstate and interregional levels that have influenced humanitarian cooperation are considered. The factors influencing the development of Sino-Russian relations in the border area, related to the difficult social and economic situation of reforms in Russia in the 1990s are noted. We consider the position of the leaders of the Amur Region in relation to the development of humanitarian relations with the neighbouring region of People’s Republic of China. The main directions of hu-manitarian cooperation between the Amur Region and the border territories of China (first of all, with the province of Heilongjiang) in the field of tourism, culture, sports, as well as in the educa-tional space are highlighted. It is proved that the development of Sino-Russian interstate relations since the late 1980s can be described as progressive and stable. The conclusion is made about the features of cooperation with the regions of the People’s Republic of China, the significant role of the geographical position of the region in the development of international interaction, as well as the stability of the rate of convergence in the field of humanitarian cooperation between the two countries.
On an ill-posed boundary value problem for the Laplace equation in a circular cylinder
Authors: Laneev Evgeniy B. , Bykov Dmitriy Yu. , Zubarenko Anastasia V. , Kulikova Olga N. , Morozova Darya A. , Shunin Evgeniy V.
Published: August 2021

In this paper, we consider a mixed problem for the Laplace equation in a region in a circular cylinder. On the lateral surface of a cylidrical region, the homogeneous boundary conditions of the first kind are given. The cylindrical area is bounded on one side by an arbitrary surface on which the Cauchy conditions are set, i.e. a function and its normal derivative are given. The other border of the cylindrical area is free. This problem is ill-posed, and to construct its approximate solution in the case of Cauchy data known with some error it is necessary to use regularizing algorithms. In this paper, the problem is reduced to a Fredholm integral equation of the first kind. Based on the solution of the integral equation, an explicit representation of the exact solution of the problem is obtained in the form of a Fourier series with the eigenfunctions of the first boundary value problem for the Laplace equation in a circle. A stable solution of the integral equation is obtained by the Tikhonov regularization method. The extremal of the Tikhonov functional is considered as an approximate solution. Based on this solution, an approximate solution of the problem in the whole is constructed. The theorem on convergence of the approximate solution of the problem to the exact one as the error in the Cauchy data tends to zero and the regularization parameter is matched with the error in the data is given. The results can be used for mathematical processing of thermal imaging data in medical diagnostics.
Solvability conditions in the analytical form of a descriptor system of partial differential equations
Authors: Mohamad Abdulftah H.
Published: August 2021

A system of first-order partial differential-algebraic equations in a Banach space with constant degenerate operators in the case of a regular operator pencil is considered. In this case, under some additional condition, the original system splits into two subsystems in disjoint subspaces in order to search for the projections of the original unknown function in the subspaces. The matching conditions for the parameters of the systems are identified. A solution of the considered system of differential-algebraic equations is constructed.
Study of rigidity of a first-order algebro-differential system with perturbation in the right-hand side
Authors: Uskov Vladimir I.
Published: August 2021

The rigidity of a dynamical system described by a first-order differential equationwith an irreversible operator at the highest derivative is investigated. The system is perturbed by an operator addition of the order of the second power of a small parameter. Conditions under which the system is robust with respect to these disturbances are determined as well as conditions under which the influence of disturbances is significant. For this, the bifurcation equation is derived. It is used to set the type of boundary layer functions. As an example, we investigate the initial boundary value problem for a system of partial differential equations with a mixed second partial derivative which occurs in the study of the processes of sorption anddesorption of gases, drying processes, etc.
Značilnosti opravljanja sečnje in spravila v zasebnih gozdovih v Sloveniji
Authors: Ščap Špela , Stare Darja , Krajnc Nike , Triplat Matevž
Published: August 2021

A survey conducted in 2019 covered 544 randomly selected forest owners. More than half of the forest owners own a forest estate ranging from 1 to 4.99 ha. For 62 % of respondents, the primary purpose of forest management is to harvest wood for their own needs. In 2015%2019, 71 % of respondents carried out felling and skidding in their forests. In total, approximately 50,000 m3 of wood was felled (24 m3 /ha or 141 m3 per holding). The largest volumes were felled by private owners with small forest holdings (up to 0.99 ha), on average 41.4 m3 /ha. There were statistically significant differences between the size of the forest holding and the average volume of annual felling. Furthermore, there were no statistically significant differences in felling intensity between male and female forest owners. The survey found that professional contractors carried out 41 % of felling and harvesting. Furthermore, there were significant differences between the size of the private forest estate and the method of performing forest operations. The results showed that the largest share of private owners who carry out all felling and skidding with the help of hired contractors is in the size class of forest holdings from 5 to 9.99 ha. The study did not confirm statistically significant differences in the intensity of felling between male and female private forest owners.
Pressure Transient Analysis for Horizontal Wells in Coal Bed Methane Reservoirs with Pressure-Sensitive Permeabilities
Authors: Sepúlveda Juan Camilo , Díaz Sebastián , López Edwin Alexander
Published: August 2021

Abstract: Coal bed methane (CBM) reservoirs are complex systems whose properties differ from those of conventional reservoirs. Coal seams are dual-porosity systems that comprise the porosities of the matrix and cleat system. Gas in the coal seams can be stored as free gas in the cleat system and as adsorbed gas in the porous medium. The flow mechanisms of the natural gas through the formation include desorption, diffusion, and Darcy’s flow regimes. The permeability of CBM reservoirs is more sensitive to pressure variations than conventional gas reservoirs. To study the flow behavior of CBM reservoirs it is mandatory to use a model that considers their unique characteristics. The objective of this study was to propose a physical and mathematical model of production performance for horizontal wells in CBM reservoirs whose permeability is dependent on pressure. A solution for the model was obtained by applying Pedrosa´s transformation, perturbation theory, Laplace transformation, the point source method, and Sthefest´s algorithm. The solution to this problem was validated with previous work thoroughly. The type curves of the model were built and the pressure transient behavior of the model was analyzed and discussed. The effects of several parameters on pressure behavior were also discussed.
Exploring Clinical Correlates of Metacognition in Bipolar Disorders Using Moderation Analyses: The Role of Antipsychotics
Authors: Roux Paul , Faivre Nathan , Cannavo Anne-Sophie , Brunet-Gouet Eric , Passerieux Christine
Published: August 2021

The determinants of metacognition are still poorly understood in bipolar disorders (BD). We aimed to examine the clinical determinants of metacognition, defined as the agreement between objective and subjective cognition in individuals with BD. The participants consisted of 281 patients with BD who underwent an extensive neuropsychological battery and clinical evaluation. To assess subjective cognition, participants provided a general rating of their estimated cognitive difficulties. Clinical characteristics of BD were also recorded, along with medication. We studied the potential moderation of the association between cognitive complaints and global objective cognitive performance by several clinical variables with ordinal logistic regressions. Depression and impulsivity were associated with greater cognitive complaints. The only variable that moderated the relationship between objective and subjective cognition in the global model was the prescription of antipsychotics. Patients taking antipsychotics had a poorer association between cognitive complaints and objective neuropsychological performance. This result suggests a role for dopamine in the modulation of metacognitive performance, and calls for the systematic control of antipsychotic medication in future studies documenting metacognitive deficits in severe and persistent mental disorders. Depression and impulsivity should be investigated as potential therapeutic targets for individuals with BD and cognitive complaints, before proposing an extensive neuropsychological evaluation.
A Position Sensing Glove to Aid Ankle-Foot Orthosis Diagnosis and Treatment
Authors: Cazacu Eduard , Grinten Coen , Bax Jeroen , Baeten Guus , Holtkamp Fred , Lee Chris J.
Published: August 2021

A position sensing glove, called SmartScan, that creates a 3D virtual model of a real object is presented. The data from the glove is processed by a volume minimization algorithm to validate the position sensor data. This allows only data from the object’s surface to be retained. The data validation algorithm allows the user to progressively improve an image by repeatedly moving their hand over the object. In addition, the user can choose their own balance between feature resolution and invalid data rejection. The SmartScan glove is tested on a foot model and is shown to be robust against motion artifacts, and has a mean accuracy of 2.9 mm (compared to a 3D model generated from optical imaging) without calibration.
Multi-Granularity Neural Network Encoding Method for Land Cover and Land Use Image Classification
Authors: Wang Guoyin , Bosco Musabe Jean , Yves Hategekimana
Published: August 2021

Deep learning classification is the state-of-the-art of machine learning approach. Earlier work proves that the deep convolutional neural network has successfully and brilliantly in different applications such as images or video data. Recognizing and clarifying the remote sensing aspect of the earth's surface and exploit land cover and land use (LCLU). First, this article summarized the remote sensing emerging application and challenges for deep learning methods. Second, we propose four approaches to learn efficient and effective CNNs to transfer image representation on the ImageNet dataset to recognize LCLU datasets. We use VGG16, Inception-ResNet-V2, Inception-V3, and DenseNet201 models to extract features from the EACC dataset. We use pre-trained CNNs on ImageNet to extract features. For feature selection we proposed principal component analysis (PCA) to improve accuracy and speed up the model. We train our model by multi-layer perceptron (MLP) as a classifier. Lastly, we apply the multi-granularity encoding ensemble model. We achieve an overall accuracy of 92.3% for the nine-class classification problem. This work will help remote sensing scientists understand deep learning tools and apply them in large-scale remote sensing challenges
Before the Next COP: How to Stop Missing our Environmental Policy Targets
Authors: Garcia Claude A. , Savilaakso Sini , Verburg René W. , Stoudmann Natasha , Fernbach Philip , Sloman Steven A. , Peterson Garry D. , Araújo Miguel B. , Bastin Jean-François , Boutinot Laurence , Dessard Hélène , Dray Anne , Francisco Scott , Ghazoul Jaboury , Feintrenie Laurène , Kleinschroth Fritz , Naimi Babak , Novotny Ivan P. , Oszwald Johan , Pietsch Stephan A. , Quétier Fabien , Robinson Brian E. , Sassen Marieke , Sist Plinio , Sunderland Terry , Vermeulen Cédric , Wilmé Lucienne , Wilson Sarah J. , Zorondo Rodríguez Francisco , Waeber Patrick O.
Published: August 2021

While the scientific community has focused on documenting environmental degradation and developing scenarios that help identify the operational margins for system Earth, less attention has been given to the mental models of decision-makers that underpin environmental policies. We suggest that global efforts to stop deforestation and biodiversity loss are failing in part due to a critical blind spot in the analysis—human agency. To address this weakness, we propose to formulate mental models and translate them into strategy games. This will increase the representation of agency in scenario development and create spaces for deliberation between different worldviews. We claim that personal transformation can be achieved through transparent democratic dialogues that identify, challenge, and respond to the human and social limitations inherent to decision-making and we present empirical examples that validate that claim. Their transformation through gaming gives decision-makers access to the experience of consciousness: “what is it like being a stakeholder?”. Such experience will help to break free of established norms in science and political processes.
Prevention and Treatment of Methotrexate-induced Hepatotoxicity: Potential of Natural Phytobioactive Compounds
Authors: Adu-Frimpong Michael , Abugri James , Osei Henewaah Annor Bridget
Published: August 2021

Methotrexate (MTX) is a potent drug for the treatment of various diseases globally amidst being a chemotherapeutic and immunosuppressant agent. However, hepatotoxicity induced by MTX could be life-threatening if left untreated. Folate supplementation is concurrently applied to reduce the adverse effects of MTX, albeit efficacy compromise. Therefore, there is the need to understand the process for the prevention and treatment strategies for MTX induced hepatotoxicity (MIH). In recent times, preliminary preclinical and clinical findings indicate the potential of natural phytobioactive compounds for MIH prevention and treatment. This mini review therefore summarizes proposed mechanisms of MIH and recent advances in the prevention and treatment prospects of natural phytobioactive compounds on MIH.
EHMT2/G9a as an Epigenetic Target in Pediatric and Adult Brain Tumors
Authors: Souza Barbara Kunzler , Freire Natalia Hogetop , Jaeger Mariane , de Farias Caroline Brunetto , Brunetto Algemir Lunardi , Brunetto André T. , Roesler Rafael
Published: August 2021

Epigenetic mechanisms, including post-translational modifications of DNA and histones that influence chromatin structure, regulate gene expression during normal development, and are also involved in carcinogenesis and cancer progression. The histone methyltransferase G9a (euchromatic histone lysine methyltransferase 2, EHMT2), which mostly mediates mono- and dimethylation by histone H3 lysine 9 (H3K9), influences gene expression involved in embryonic development and tissue differentiation. Overexpression of G9a has been observed in several cancer types, and different classes of G9a inhibitors have been developed as potential anticancer agents. Here, we review the emerging evidence suggesting the involvement of changes in G9a activity in brain tumors, namely glioblastoma (GBM), the main type of primary malignant brain cancer in adults, and medulloblastoma (MB), the most common type of malignant brain cancer in children. We also dis cuss the role of G9a in neuroblastoma (NB) and the drug development of G9a inhibitors. Finally, we present evidence that G9a inhibition dose-dependently reduces MB cell viability, and that transcriptional levels of G9a are higher in MB tumors belonging to the SHH, Group 3, and Group 4, compared to Wnt tumors. Importantly, our findings suggest that higher G9a gene expression may be a predictor of poor prognosis in patients with SHH MB.
Facile Synthesis of Sulfonyl Chlorides/Bromides from Sulfonyl Hydrazides
Authors: Chen Rongxiang , Xu Shaohong , Shen Fumin , Xu Canran , Wang Kai-Kai , Wang Zhan-Yong , Liu Lantao
Published: August 2021

A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazide with NXS (X = Cl or Br) and late-stage conversion to several other functional groups has been described. A variety of nucleophiles could be engaged in this transformation thus permitting the synthesis of complex sulfonamides, sulfonates. In most cases, these reactions are highly selective, simple, and clean, affording products in excellent yields.
Prevalence, Phylogroups, Antimicrobial Susceptibility and GE-Netic Diversity of Escherichia coli Isolates From Food Products
Authors: Pakbin Babak , Allahyari Samaneh , Amani Zahra , Bruck Wolfram Manuel , Mahmoudi Razzagh , Peymani Amir
Published: August 2021

The emergence of multi-drug resistant E. coli is an important matter of increasing considerable concern to global public health. The aim of this study was to investigate the incidence, antibiotic resistance pattern, phylogroups and genetic variation of E. coli isolates from raw milk, vegetable salad and ground meat samples. Methods: Culture-based techniques, Kirby-Bauer disk diffusion susceptibility testing, PCR and RAPD assays were used to determine the incidence rate, antimicrobial resistance pattern, phylogenetic groups and genetic diversity of the E. coli isolates. Results: E. coli isolates were highly resistant to amoxicillin (79.16%), trime-thoprim-sulfamethoxazole (70.83%), amoxicillin-clavulanic acid (62.50%), tetracycline (54.16%), chloramphenicol (54.16%), nitrofurantoin (54.16%), ampicillin (45.83%), streptomycin (45.83%), and kanamycin (33.33%); and completely susceptible to norfloxacin and azithromycin. 70.83% of the isolates were multi-drug resistant. Most E. coli isolates (46%) belonged to phylogroup A. RAPD with UBC245 primer categorized the isolates into 11 clusters. A high level of genetic di-versity was found among the isolates; however, 33.3% of the isolates were grouped in a major cluster (R5). Conclusions: Antibiotic resistance patterns are randomly distributed among the ge-netic clusters. Novel, practical, efficient food safety control and surveillance systems of multi-drug resistant foodborne pathogens are required to control the foodborne pathogen contamina-tion.
On the Operational Utility of Measures of EEG Integrated Information
Authors: Darmon David , Watanabe Tomas , Cellucci Christopher , Rapp Paul E
Published: August 2021

Multichannel EEGs were obtained from healthy participants in the eyes-closed no-task condition (where the alpha component is typically abolished). EEG dynamics in the two conditions were quantified with two related binary Lempel-Ziv measures of the first principal component and with three measures of integrated information including the more recently proposed integrated synergy. Both integrated information and integrated synergy with model order p=1 had greater values in the eyes closed condition. If the model order of integrated synergy was determined with the Bayesian Information Criterion, this pattern was reversed, and in common with other measures, integrated synergy was greater in the eyes open condition. Eyes open versus eyes closed separation was quantified by calculation of the between-condition effect size. Lempel-Ziv complexity of the first principal component showed greater separation than the measures of integrated information. The performance of the integrated information measures investigated here when distinguishing between indisputably different physiological states encourages caution when advocating for their use as measures of consciousness.