bluuebunny/crossref_metadata_2025 huggingface dataset:
Política, cultura e hegemonia na sociedade civil: uma leitura gramsciana
Authors: Santos Wilson da Silva
Published: July 2018

Este artigo tem o objetivo de analisar a relação entre política, cultura e hegemonia em Gramsci. Para tanto, o presente trabalho parte da ideia gramsciana segundo a qual é na construção da hegemonia que se desenvolve a formação ético-política norteada dentro da coletividade, favorecendo ao sujeito a compreensão crítica de si, dentro de uma luta de hegemonias políticas, de direções contrastantes, a princípio no campo da ética, depois da política, para chegar a uma elaboração superior da concepção do real.
O papel da educação na cooptação ideológica em Gramsci e Freire
Authors: Costa Bruno Botelho
Published: July 2018

Este trabalho tem por objetivo discutir o processo de cooptação ideológica em Antonio Gramsci e Paulo Freire. Procuraremos ver nas ponderações sobre a contradição Estado/Sociedade civil e sua relevância na disputa da hegemonia de classe em Gramsci e contradição entre teorias de ação dialógica e anti-dialógica em Freire, a possível associação entre suas perspectivas pedagógicas e ideológicas. Para tanto, abordaremos a questão da educação em Freire e Gramsci no intuito de ver nas concepções de intelectual orgânico e do educador-educando dialógico aproximações entre os contrapontos desses autores à referidas contradições.
O lugar da educação em Gramsci: correlação com seus conceitos políticos
Authors: Silva Deise Rosalio
Published: July 2018

Antonio Gramsci contribuiu de modo original e relevante para os estudos de educação. Ansiava por instrumentos capazes de alterar a estrutura da sociedade e a educação ocupa um lugar destacado em sua reflexão sobre a transformação social. Para compreendê-lo é necessário examinar não apenas os trechos explícitos sobre intelectuais, educação e cultura de sua obra, mas os conceitos e elucidações que aborda, o encadeamento que o plano político estabelece com seu plano de ação para a construção de uma nova sociedade e, portanto, de seu ideal de formação.
Hegemonia e “autogestão” no MST
Authors: Pereira Evelyne Medeiros
Published: July 2018

Com referência na perspectiva marxista-gramsciana, o estudo que ora se apresenta pretende analisar as repercussões das estratégias organizativas (em âmbito econômico e político) da classe trabalhadora na construção de uma nova hegemonia na sociedade brasileira. Para isso, tomaremos como base as experiências vigentes, desenvolvidas pelo Movimento dos Trabalhadores Rurais Sem Terra/MST. Vale ressaltar que partiremos do ponto de vista das contradições, não apenas dessas estratégias, mas da própria sociedade capitalista.
O intelectual orgânico e a formação política do movimento estudantil
Authors: Vilhagra Gabriela Teixeira de Freitas Ribeiro
Published: July 2018

Este trabalho constata a necessidade de uma formação de professores emancipada do sistema capitalista e discute a possibilidade de o movimento estudantil proporcionar uma formação política aos estudantes e futuros profissionais. A formação de professoras e professores é cada vez mais influenciada pelas determinações dos organismos internacionais, e mais difícil fica organizar a resistência ao capitalismo. As atividades das entidades do movimento estudantil, seu histórico de ação e questionamentos das condições do ensino e da sociedade brasileira podem permitir uma formação contra-hegemônica.
Hegemonia e a reconstrução ética no pensamento de Antonio Gramsci
Authors: Bandeira Heloisa Gomes , Landim Eveline de Sousa
Published: July 2018

O trabalho consiste no estudo da relação entre o conceito de hegemonia na obra do pensador e militante italiano Antônio Gramsci e a construção de uma nova moralidade a partir da reflexão e vivência de valores emancipatórios. Tal relação se fundamenta na medida em que observamos a conceituação gramsciana acerca do processo de conquista de hegemonia que pode ser primordialmente compreendido como reforma intelectual e moral, ou seja, um espraiamento de uma determinada concepção de mundo e divulgação das conquistas culturais para amplas camadas da população bem como a vivência de valores e a construção de uma nova moral a partir da reflexão ética.
Reflexões sobre questões metodológicas e práticas em pesquisas em educação
Authors: Gatti Bernardete Angelina
Published: July 2018

Comunicação apresentada no III Seminário de Epistemologia e Teorias da Educação e IV Colóquio de Epistemologia da Educação Física. Trata da problemática da identificação do campo relativo às pesquisas educacionais e suas relações com questões formativas.
Educação Física: atividade epistemológica e objetivismo
Authors: Fensterseifer Paulo Evaldo
Published: July 2018

A Educação Física, atenta aos desdobramentos no campo das ciências do debate entre as concepções dogmáticas e relativistas, pode encontrar no redimensionamento da noção de objetividade novas possibilidades para pensar a atividade epistemológica desenvolvida em seu âmbito. Sem o recurso ao “tribunal da epistemologia”, orientado por um entendimento dogmático de ciência, e recusando uma postura relativista, visualizamos no referencial hermenêutico outro modo de legitimar os conhecimentos produzidos na área.
Marxismo e cultura: contraponto às perspectivas pós-modernas
Authors: Teixeira David Romão , Dias Fernanda Braga Magalhães
Published: July 2018

Este artigo tem por objetivo apresentar a contribuição do marxismo ao debate sobre a cultura, destacando suas principais orientações e contrapontos ao debate pós-moderno. Expõe um panorama sintético do debate sobre cultura na atualidade, realiza um balanço da análise marxista sobre cultura, destacando as contribuições de Trotski sobre a temática e sua íntima ligação com o contexto revolucionário soviético e europeu de seu tempo. Ressalta a importância de compreender a interdependência dialética entre a cultura e a economia. Concluindo que a análise da cultura no campo do marxismo nos possibilita elencar orientações que demarcam a compreensão da cultura no campo da revolução social.
A educação física e as teorias do conhecimento
Authors: Saladini Ana Cláudia , Fogaça Júnior Orlando Mendes , Montoya Adrian Oscar Dongo
Published: July 2018

Historicamente a disciplina de Educação Física esteve fundamentada nos conhecimentos das ciências biológicas, revelando uma concepção positivista do movimento humano. Pensamos que a Educação Física deve compreender melhor este ser humano que se movimenta e se reconstrói enquanto sujeito. Não basta apenas que faça as atividades práticas das aulas. É preciso que compreenda esta ação. A problemática que surge é: como o sujeito constrói conhecimento? Para responder, destacamos as teorias do apriorismo, empirismo e construtivismo, pois entendemos que explicam como o sujeito aprende, fundamentando a ação docente na Educação Física.
Pressupostos teórico-metodológicos da genealogia: composições para um debate na educação
Authors: Moruzzi Andrea Braga , Abramowicz Anete
Published: July 2018

Este trabalho procura mapear, a partir de um estudo bibliográfico, a genealogia enquanto referencial teórico metodológico pós-estruturalista. Como resultado, observa-se que a genealogia aparece de forma contínua e com muitas similaridades em Nietzsche, Foucault e Deleuze, contudo, na educação trata-se ainda de uma perspectiva teórica metodológica pouco explorada. São elementos da genealogia: questionar o conhecimento, o saber e as verdades; questionar quem as produzem e em que condições, fazendo emergir as relações de poder que as tornam possíveis; por fim, entrar no campo da genealogia é colocar em foco saberes antes não considerados, é trazer à tona o marginal e o impensado.
Tendências epistemológicas da pesquisa em educação especial no Brasil: a análise das dissertações e teses do PPGEEs/UFSCar
Authors: Silva Régis Henrique dos Reis
Published: July 2018

Este estudo teve como objetivo geral, analisar, a partir das abordagens metodológicas, as implicações epistemológicas das dissertações e teses produzidas no PPGEEs/UFSCar, levando em consideração suas inter-relações com os determinantes sociais, políticos e econômicos. Em linhas gerais obtivemos os seguintes resultados, 88,9% dos documentos analisados adotaram a abordagem empírico-analítica, 11,1% a fenomenológica-hermenêutica e 0% a crítico-dialética. Considerando as articulações entre o lógico e o histórico, verificamos que a predomínio da abordagem empírico-analítica, está relacionado com os determinantes sociais, políticos e econômicos do Brasil, especialmente ao modelo de Pós-Graduação implantado no País, assim como, com as características internas do programa estudado.
Vozes do silêncio: os sentidos do discurso de/sobre sexualidade de mulheres paraplégicas
Authors: Lima Maria do Socorro Correia
Published: July 2018

Baseado nos pressupostos teórico-metodológicos da Análise de Discurso Francesa, este trabalho visa a investigar os depoimentos de mulheres paraplégicas que residem no Distrito Federal (DF), tendo por base seus discursos sobre sexualidade, corpo e deficiência. O debate propiciou-me verificar que quando afetadas pela malha discursiva do outro é que essas mulheres constroem suas representações sobre sexualidade, corpo e deficiência.
Ciência e capitalismo
Authors: Souza Julia Paula Motta de
Published: July 2018

Este artigo reflete sobre as relações entre a ciência moderna e o capitalismo. Historicamente a ciência moderna nasce ligada ao capitalismo, pretendendo-se impor como saber hegemônico, livre de valores e baseada em quantificações. Na presente fase neoliberal do capitalismo, na qual se acentua a tendência a transformar tudo em mercadoria, a ciência vem sendo mercantilizada e as condições de trabalho dos pesquisadores vem sendo degradadas. Um dos aspectos é o surto avaliatório, que quantifica a produção acadêmica. No entanto, os pesquisadores podem exercer sua responsabilidade social que inicia com uma reflexão crítica.
Possibilidades da educação física na formação do trabalhador
Authors: Santos Jorge Oliveira dos
Published: July 2018

A problematização das práticas da Educação Física curricular em uma instituição federal de ensino profissional é o foco deste texto. Investigaram-se as concepções de educação física dos grupos de professores da disciplina e administrativo-pedagógico da instituição. O conceito marxiano de corpo e toda a análise da pesquisa deu-se com base no materialismo histórico e dialético. Concluímos que a subsunção da instituição às leis do mercado de trabalho e a ausência de politização na condução pedagógica nas práticas dos grupos estudados, evidenciou a necessidade da politização daquele coletivo.
Educação crítica: uma possibilidade de formação "ambientalista" para professores de educação física
Authors: Domingues Soraya Corrêa , Kunz Elenor
Published: July 2018

As possibilidades de diálogo pedagógico entre os campos da Educação Ambiental e Formação Humana nos cursos de Educação Física é objeto deste estudo. Buscando revisar e evidenciar os princípios e objetivos construídos historicamente da Educação Ambiental e a atual realidade da formação de professores, identificando os limites e possibilidades para a construção de uma proposta crítica pedagógica que altera a lógica na Formação de Professores em Educação Física a partir do tripé ensino, pesquisa e extensão e a Educação Ambiental.
Epistemologia das concepções abertas no ensino da educação física: o legado de Jean Piaget
Authors: Lira Neto Joaquim Francisco de
Published: July 2018

O presente trabalho tem o objetivo de analisar a influência do pensamento de Jean Piaget (1896-1980) na proposta das Concepções Abertas no ensino da Educação Física. A epistemologia do autor constituiu uma das referências para a proposta em questão, o que torna necessário o estudo dos pressupostos gnosiológicos e ontológicos da teoria piagetiana para a melhor compreensão das implicações político-pedagógicas do ensino aberto. É possível identificar problemas e limitações das Concepções Abertas, que, por herdar as visões de homem e sociedade defendidas por Piaget, encontra-se presa aos parâmetros do ensino centrado no aluno.
Educação sexual: contradições, limites e possibilidades
Authors: Bonfim Cláudia Ramos de Souza
Published: July 2018

O presente estudo bibliográfico com aporte de campo, objetiva compreender as contradições, limites e possibilidades da Educação Sexual apresentada nas escolas, especialmente na disciplina de Ciências Biológicas. A análise pauta-se nas respostas dos docentes de Ciências e na história da sexualidade e da Educação Sexual Escolar no Brasil. Procura-se, fundamentar a necessidade da inserção de uma disciplina no currículo dos cursos de Licenciatura que aborde a construção histórica e cultural da sexualidade. Busca-se vislumbrar uma Educação Sexual que possibilite ao educando construir uma identidade crítica em meio à crise de valores éticos da sociedade.
Educação como adaptação: a experiência segundo John Dewey
Authors: Matos José Claudio Morelli
Published: July 2018

Em sua filosofia da educação, fortemente marcada pelo método experimental de investigação e pela adoção da atitude naturalista, John Dewey concebe o ser humano e a sociedade com base na noção mais ampla de transmissão da vida, num ambiente social, por meio da comunicação de hábitos, crenças e valores. Caso mais específico deste processo da vida, é pela educação que a experiência de um indivíduo ou cultura se renova e se modifica. O sucesso de processos educativos, por procedimentos informais ou formais, depende do tipo de experiência envolvida e dos efeitos dessa experiência na adaptação do sujeito ao seu ambiente.
Niilismo e decadência
Authors: Mendonça Samuel , Silva Igor Hideo Kato da
Published: July 2018

Em O Niilismo, Volpi Franco discorre sobre a história do niilismo e problematiza temas contemporâneos como o fim da história, o relativismo e o ceticismo.
Az egészséges táplálkozás szerepe és jelentősége
Authors: Pfau Christa , Müller Anetta , Bács Zoltán , Bácsné Bába Éva
Published: July 2018

A gyümölcs- és zöldségfogyasztás és a fizikai aktivitás növelése egy praktikus stratégia vala­mennyi korosztály számára, hogy megőrizzék egészségüket és a krónikus betegségek kocká­zatát csökkentsék. Az egészségfejlesztés terü­letén a rendszeres testmozgás és az egészséges táplálkozási szokások kialakítása és megszilár­dítása a köznevelési intézményekben – ahol a gyerekek életmódjába beépülhet – hosszú tá­von eredményezhet egy egészségesebb felnö­vekvő generációt (HIDVÉGI és BÍRÓ, 2015).A rendszeres sportolással, fizikai aktivi­tással az elhízás csökkenthető. Több hazai és nemzetközi kutatás bemutatja azt, hogy a heti többszöri rendszeres testmozgás vagy a fizi­kai aktivitás egészség-előnnyel jár, illetve a rendszeresen sportoló populációban kevesebb azoknak a száma, akik a BMI index alapján a túlsúlyos vagy az elhízott kategóriába tartoz­nak (DONNELLY et al., 2013; WIKLUND, 2016; HERPAINÉ et al., 2017). Ezért a né­pegészségügyi stratégiáknak, a beavatkozási területeknek az egészséges táplálkozáson túl a testmozgást ösztönző programok is nélkülöz­hetetlen elemei kell, hogy legyenek.
JEL-kód: I12
Educación y enseñanza en las tesis de graduación de la formación de los profesores de educación física en el Uruguay (1950 – 1954)
Authors: Dogliotti Paola
Published: July 2018

El trabajo aborda las principales discursividades en torno a la educación y a la enseñanza en las tesis de graduación de los estudiantes de la carrera de profesor de educación física impartida en el Instituto Superior de Educación Física de Uruguay en el primer lustro de la década del 50. Se señala la potencialidad de estas fuentes para el estudio historiográfico en el campo educativo. Como parte de la circulación de ideas, teorías y prácticas pedagógicas que muestran las tesis, se aborda la influencia y traducción local de la compleja trama de corrientes psicológicas y filosóficas que conformaron la “Escuela Nueva” y de la perspectiva tecnicista del curriculum de raigambre anglosajona al desarrollo de los fundamentos pedagógicos y didácticos del campo de la educación física.
La actividad física de la comunidad rural: la YMCA en México durante la década de los años 20
Authors: Martínez Moctezuma Lucia
Published: July 2018

Después del movimiento revolucionario de 1910 en México, la Secretaría de Educación Pública puso en práctica una serie de proyectos educativos orientados a las necesidades de la población rural. Las Misiones Culturales lograron conjuntar a toda la comunidad en torno a una serie de actividades que, a través de la escuela, apuntaron el desarrollo físico y cultural de niños, mujeres y hombres, con la realización de festivales y encuentros deportivos en los que se conjugó el baile y el canto con la práctica del futbol, el basquetbol, el volibol y el beisbol. El objetivo de este trabajo es dar cuenta de estas prácticas novedosas que muestran la implementación de un modelo norteamericano de desarrollo físico en la escuela mexicana, el de la Young Men´s Christian Association YMCA, en el que se implementan nuevas estrategias para integrar a la comunidad rural a partir de propuestas festivas y deportivas que apuntaban también a un disciplinamiento y administración del tiempo libre.
A formação de professores de Educação Física em imagens: acervos fotográficos em exposição
Authors: Linhales Meily Assbú , Segantini Verona Campos , Scarlato García Inés , Dogliotti Paola
Published: July 2018

O presente texto tem como proposição apresentar experiências de organização de acervos históricos relativos à Educação Física em instituições de salvaguarda no Uruguai e no Brasil. Mais especificamente, pretende-se discutir processos de investigação a partir de acervos fotográficos que revelam aspectos das práticas de formação de professores de educação física nos dois países. Decorrentes desse processo de aproximação e diálogo relata-se o processo curatorial e de concepção de uma exposição fotográfica que buscou explorar tempos, espaços e as práticas selecionadas presentes na formação de futuros professores das escolas e das praças de jogos e esportes.
PERNIKAHAN ADAT JAWA DI DESA NENGAHAN, KECAMATAN BAYAT, KABUPATEN KLATEN
Authors: Pratama Bayu Ady , Wahyuningsih Novita
Published: July 2018

Membahas tentang upacara perkawinan di Nengahan, Bayat, Klaten selama upacara perkawinan merupakan suatu rangkaian kegiatan tradisional yang turun-menurun dan mempunyai maksud serta tujuan agar sebuah perkawinan dapat selamat, sejahtera dan mendatangkan kebahagiaan dalam keluarga dikemudian hari. Kebudayaan di Jawa sudah berinteraksi dengan adanya norma-norma agama. Tujuan dari penelitian ini yaitu untuk mengetahui tentang proses perkawinan dari masyarakat Nengahan Bayat Klaten baik dalam ide,  adat istiadat, kepercayaan dalam melangsungkan perkawinan bagi masyarakat adat Jawa. Terutama di penelitian yang dilakukan yaitu wawancara, studi pustaka. Manfaat dari penelitian ini adalah untuk memperkenalkan kepada msayarakat luas tentang budaya pernikahan adat jawa terutama pernikahan adapat Jawa di desa Nengahan, kecamatan Bayat, kabupaten Klaten. Disini juga dapat dirumuskan masalah seperti apa yang dimaksud pernikahan adat Jawa di Nengahan, Bayat, Klaten dan bagaimana proses pernikahanya. Untuk mengetahui pernikahan adat Jawa serta proses dalam pernikahan adat Jawa di Nengahan, Bayat, Klaten. Karena ketertarikan penulis ingin mengetahui tentang bagaimana upacara pernikahan adat Jawa dari mulai pengenalan calon pasangan pengantin, tata cara dalam suatu proses lamaran, suatu proses pernikahan dalam adat Jawa, sampai dengan upacara perkawinan adat Jawa. Dalam suatu upacara perkawinan adat Jawa yang di dalamnya juga terkandung nilai-nilai dari keagamaan yang diharapkan bermanfaat bagi kedua mempelai dalam mengarungi sebuah bahtera rumah tangga.

 
Feasibility Study on Beef Cattle Development in Teluk Bintuni Regency, West Papua
Authors: Widayati Trisiwi Wahyu , Santoso Budi , Woran Djonly , Warsono Irba Unggul , Palulungan John Arnold
Published: July 2018

The purpose of this study was to obtain information on the readiness of the development of beef cattle using ranch system in Bintuni District, West Papua through the approach of four local foundations in terms of technical, social and economic. Research respondents were 62 families from four local foundations in Bintuni. Determination of technical feasibility of land used based on carrying capacity for each land. The technical feasibility of raising cattle was observed based on the knowledge of the community. Socio-economic feasibility was investigated based on food security and poverty level of society. Business feasibility was determined according to economic indicators namely B/C ratio, NPV, and IRR. The results showed that the aspect of land provided by the four foundations was feasible with the average carrying capacity based on fresh weight, dry matter and TDN basis were 1.8, 2.0 and 4.5 AU/Ha/year, respectively. About 70,91% of the farmers are free from poverty, and 46.54% are in food security status, which means that cattle raising will not be disturbed by the basic requirement of life but it needs an initial investment to support cattle raising. Based on the technical feasibility of cattle raising as much as 64,39% having no knowledge of breeding, therefore training and livestock education should be done. The business feasibility result shows that cattle raising on a breeding scale of 60 heads were feasible with positive NPV value of IDR 2.536.610,211, IRR of 23.09% and B/C of 1.22. Based on the overall indicators, it was concluded that the development of beef cattle in Bintuni regency was feasible to be done with requisite that improvement on land aspects and community knowledge about raising cattle.
FAKTOR-FAKTOR YANG MEMPENGARUHI KEBERHASILAN REDENOMINASI MATA UANG: PENDEKATAN DATA HISTORIS DAN PERCOBAAN
Authors: Deni Priyarsono
Published: July 2018

Redenomination is a simplification of nominal value of currency by reducing digit (zero number) without reducing the real value of the currency. The main objective of this research was to examine whether the economic conditions at the time of redenomination may affect the success of currency redenomination. The methods used were regression analysis on historical data of 30 countries which are involved in redenominating their currencies, economic experiments with t-test, and survey of people’ perspective. Based on regression analysis, inflation will decrease and economic growth will rise higher after redenomination, if previously a country have experienced high economic growth as well. Based on experimental research, when inflation was high, redenomination could increase the selling price. Otherwise, when inflation was low, redenomination could decrease the selling price. Changes in selling price after redenomination was not affected significantly by differences in economic growth conditions. In different economic conditions, redenomination policy did not significantly affect the changes number of transactions and total value of transactions in the market. From the survey results, public did not believe government can control inflation after redenomination. Redenomination also will not affect consumption pattern
MODELING OF POWER SYSTEMS AND TESTING OF RELAY PROTECTION DEVICES IN REAL AND MODEL TIME
Authors: Novash I. V.
Published: July 2018

The methods of modelling of power system modes and of testing of relay protection devices with the aid the simulation complexes in real time and with the help of computer software systems that enables the simulation of virtual time scale are considered. Information input protection signals in the simulation of the virtual model time are being obtained in the computational experiment, whereas the tests of protective devices are carried out with the help of hardware and software test systems with the use of estimated input signals. Study of power system stability when modes of generating and consuming electrical equipment and conditions of devices of relay protection are being changed requires testing with the use of digital simulators in a mode of a closed loop. Herewith feedbacks between a model of the power system operating in a real time and external devices or their models must be determined (modelled). Modelling in real time and the analysis of international experience in the use of digital simulation power systems for real-time simulation (RTDS simulator) have been fulfilled. Examples are given of the use of RTDS systems by foreign energy companies to test relay protection systems and control, to test the equipment and devices of automatic control, analysis of cyber security and evaluation of the operation of energy systems under different scenarios of occurrence of emergency situations. Some quantitative data on the distribution of RTDS in different countries and Russia are presented. It is noted that the leading energy universities of Russia use the real-time simulation not only to solve scientific and technical problems, but also to conduct training and laboratory classes on modelling of electric networks and anti-emergency automatic equipment with the students. In order to check serviceability of devices of relay protection without taking into account the reaction of the power system tests can be performed in an open loop mode with the use of hardware and software test systems. Testing methods for relay protection and their models in open-loop mode have been proposed.
REDUCTION OF FRICTION LOSSES DUE TO THE VORTEX FLOW OF THE MAGNETIC FLUID CAUSED BY THE ADDITIVES OF CARBON NANOTUBES
Authors: Labkovich O. N.
Published: July 2018

Magnetic fluids are promising lubricating material, in particular, in sliding bearings. With the aid of the magnetic system the magnetic fluid is held in the gap of friction that simplifies the design of the lubrication system sufficiently. It is known that when conventional lubricants (mineral oil, water) flow, with increasing of speed of rotation of the inner cylinder the transition of laminar flow in a vortex takes place. This dramatically increases the viscous friction losses. The friction losses in a wide range of speeds and possibilities of their decrease due to the vortex flow of the magnetic fluid in the gap between the cylinders are experimentally studied. It is revealed that when the dimensionless speed – number of Taylor equal to 41.2 – is reached, the slope of the curve of friction torque sharply increases, viscous losses also increase, i. e. there is a change laminar flow to a vortex one. The average temperature in the layer of the magnetic fluid reaches 60 оC. This factor leads to increased evaporation of the carrier liquid (water, mineral oil), which reduces the service life of the lubricant i.e. the magnetic fluid. In order to reduce viscous friction when a vortex flow of magnetic fluids takes place, carbon nanotubes, which are cylinders with a diameter of 5.0 nm and a length of about 0.1 mm, are brought into the magnetic fluid. Carbon nanotubes demonstrate elasticity under transverse bending: they curve under the impact of load, and after its removal they restore their original shape. They are also able to elongate along the axis by 16 % and to return to its original position after removal of the load. The effect of reducing friction (about 30 %) with a vortex flow of magnetic fluid by the introduction of carbon nanotubes in a magnetic fluid is experimentally obtained. The likely mechanism of friction reduction is the ability of nanotubes to deform under the influence of pressure pulsations and the velocity of the swirling flow, and to absorb partially a part of their energy. As it was experimentally demonstrated, there is an optimum weight concentration of the additive of nanotubes in the magnetic fluid (~10–4) that is associated with the maximum effect of reducing friction by 30 %. Thus, the insertion of carbon nanotubes in the lubricant (magnetic fluid) makes it possible to reduce the viscous friction and, consequently, to increase the range of operating speeds, to strengthen the online lubricant site.
FUNCTION REGULATION OF CUSTOMER’S PLANT THAT BURN TRADITIONAL TYPES OF FUEL
Authors: Zoryna T. G.
Published: July 2018

This article deals with the issue of function regulation of customer’s plants that burn traditional types of fuel. Its aim was to develop certain measures for reducing customer’s plants influence on the Belarusian power supply system as their activity has unfavorable economic consequences. The following methods were used in the present research: the system analysis, the method of analogies and expenses calculation. The article presents the comparative characteristics of the power production during the typical working day of the heating period in the years 2013 and 2014 in terms of condensation power plants, central heating and power plants and customer’s plants. The potential damage caused by the customer’s plants to the power supply system has been calculated, the restrictions for the customer’s plants activity existing in the Republic of Belarus nowadays has been analyzed. The author has developed a number of measures within the framework of regulation policy of the activity of customer’s plants that burn traditional types of fuel: the fee for the spinning reserve necessary for the power supply system in case of the customer’s plants breakdown; the fee for the supervisory control; the fee for the service of transfer and distribution. The introduction of the proposed measures is supposed to bring the following advantages: high-quality growth of energy efficiency of the power industry; prime cost reduction of power energy in the power supply system as a whole; stimulation of market elements implementation in the power industry; the ability to react fairly fast to the alterations of economic conditions.
SAMPLING OF THE PLAN OF REPAIRS OF THE MAIN EQUIPMENT IN THE ELECTRICAL POWER SYSTEM
Authors: Alexandrov O. I.
Published: July 2018

The main aspects of creation of the formal-and-functional mathematical models supporting a system for prompt resolution of repair requires in a complex electric power system are considered in the article. In accordance with the standards of repairs, inspections, replacement of elements of the main equipment or devices of a system of automation, inclusion of spare capacity, various switches, as well as with the frequency of outages adopted in practice, the decisionmaking process is formalized and automated as the problem of scheduling optimal daily schedules of blackouts, functioning as a part of automated system of dispatching management of electric power system. The main problems that hinder mathematical modeling of decision-making concerning operational applications for the repair of the main power equipment of power system are: the need for a coherent account of a large number of limiting factors and indicators of effectiveness of the solutions; the need of information and algorithmic trade-offs with the objectives of adjacent levels of spatial, temporal and functional hierarchy; the lack of developments in the standardization of information structures that adequately reflect the process of finding solutions; the computational complexity of several restrictions of the optimization problem subject to mandatory registration.
APPROXIMATE SOLUTION OF ONE PROBLEM ON ELECTRICAL OSCILLATIONS IN WIRES WITH THE USE OF POLYLOGARITHMS
Authors: Lasy P. G. , Meleshko I. N.
Published: July 2018

The article considers a mixed problem with homogeneous boundary conditions for onedimensional homogeneous wave equation. Such a problem can arise, for example, when studying oscillations of current and voltage in the conductor through which electric current flows, while the line is free from distortion. The solution can be found with the use of the Fourier method in the form of trigonometric series. This representation is of purely theoretical interest, because the real calculation should be, first, to find a large number of coefficients of the integrals, which in itself is not a trivial task and, second, it is almost impossible to assess the error of the calculations. An alternative way of solving this problem based on the use of transcendental functions i. e. polylogarithms that represent complex power series of a special kind. The exact solution of the problem is expressed through the imaginary part of a polylogarithm of the first order on the single circle and the approximate one – via the real part of the dilogarithm. In addition, if the initial conditions in the problem are elementary functions, then the solution is also computed using elementary functions. A simple and effective error estimate of the approximate solution has been found. It does not depend on time and it has the first-order of accuracy regarding the step of a partitioning segment of the numerical axis on which the problem is considered. This valuation is uniform with respect to the variables of the problem – both spatial and temporal.
ON THE SIMULATION OF MODES ОF ELECTRIC POWER SYSTEMS WITH FACTS
Authors: Halilov E. D.
Published: July 2018

Power flow control is an important task of development of electric power systems. It is necessary to reduce the power loss, improve the reliability and quality of power supply and increase the power transmission. Currently, on the basis of modern power electronics effective FАСТS devices for flexible control of power system operation modes have been developed. FАСТS devices are able to simultaneously influence the voltage, the reactance, the angle between the voltages. As it is known, the calculations of the established modes of electric systems are the most frequently performed tasks at all the territorial and time levels of control and planning operations. These calculations are significant by themselves, being also an integral part of software systems of calculation of losses of power and energy in electrical networks, calculation of optimal modes and also sustainability. The need for multiple mode calculation imposes high requirements to the methods of calculation of the established modes in real time in terms of performance and reliability of the results of the solution being obtained under operating conditions of electric power systems. In traditional calculations of the established modes of electrical networks, shunt reactors, current-limiting reactors, capacitor banks, longitudinal compensation devices were accounted in the simulation as passive elements. In regard with the introduction of FACTS devices in power systems, there is an arising need to develop appropriate algorithms and implement them in the form of software for analyzing and controlling the established modes of power systems. The methodology and software for calculation of the established modes of electric networks with consideration of FACTS devices have been developed. The software makes it possible to obtain practically acceptable solutions in three outer iterations. Based on the results of numerical simulation of modes of the power system of the “Azerenergy” JSC it was determined that the application of FACTS devices can significantly increase the transmission line active power, improve voltage levels and reduce losses of active power. The dependences of flows and power losses on the control parameter of FACTS devices have been derived.
EXPERIMENTAL STUDY OF HEAT TRANSFER OF A SINGLE-ROW BUNDLE OF FINNED TUBES IN MIXED CONVECTION OF AIR
Authors: Sukhotskii A. B. , Sidorik G. S.
Published: July 2018

The technique and results of experimental study of heat transfer of a single bundle consisting of bimetallic tubes with helically knurled edges, in natural and mixed convection of air are presented. Mixed convection, i.e. a heat transfer, when the contribution of free and forced convection is comparable, was created with the help of the exhaust shaft mounted above the heat exchanger bundle and forced air movement was created by the difference in density of the air in the shaft and the environment. The experimental dependence of the heat transfer of finned single row of bundles in the selected ranges of Grashof and Reynolds numbers has been determined. It is demonstrated that heat transfer in the mixed convection is 2.5−3 times higher than in free one and the growth rate of heat transfer with increasing Reynolds number is more than in the forced convection. Different forms of representation of results of experiments were analyzed and it was determined that the Nusselt number has a single power dependence on the Reynolds number at any height of the exhaust shafts. A linear dependence of the Reynolds number on the square root of the Grashof number was determined as well as the proportionality factors for different shaft heights. It is noted that the characteristics of the motion of air particles in the bundle in free convection is identical to the motion of particles in forced convection at small Reynolds numbers, i.e. a free convection flow smoothly flows into a forced convection one without the typical failures or surges if additional driving forces arise.
THE IMPROVEMENT OF LOW-WASTE TECHNOLOGIES OF WORKING BODY OF WATER PREPARATION AT THERMAL AND NUCLEAR POWER PLANTS
Authors: Rymasheuskaya K. D.
Published: July 2018

In the present work the main directions of water desalination technologies improving have been analyzed. Possible techniques of high-quality treatment of water that enable the reduction of amounts of environmentally hazardous substances to be discharged into the hydrosphere are indicated. The purpose of the work was to improve the ecological efficiency and the effectiveness of water treatment equipment at heat power plants when designing new and the modernizing existing water treatment schemes. In order to achieve this goal the following problems have been solved: the one of analyzing the main directions of the improvement of technologies of working body of water preparation at thermal and nuclear power plants; of analyzing the main directions of reduction of total volume of highly mineralized power plant wastewaters; of developing the technological scheme of recycling of concentrate of membrane installations and regenerants of ionite filters in acid and alkali; of developing the technological scheme of transformation of the sludge in pre-processing waste into valuable commodity products. The results of research can be applied for the design of new and the modernization of existing water treatment installations of thermal and nuclear power plants. It will enable to reduce considerably the use of natural water and the amount of chemicals added as well as the volume of wastewater and the concentration of dissolved solids in it. As a consequence, the negative impact of thermal and nuclear power plants on the hydrosphere will be reduced.
STUDY OF WATER HAMMERS IN THE FILLING OF THE SYSTEM OF PRESSURE COMPENSATION IN THE WATER-COOLED AND WATER-MODERATED POWER REACTORS
Authors: Korolyev A. V. , Ishchenko A. P. , Ishchenko О. P.
Published: July 2018

The research presented in the article conforms to the severe accident that took place at the Three Mail Island nuclear power plant in the USA. The research is focused on improving the reliability of the pressure compensator that is an important equipment of the primary circuit. In order to simulate such a situation, the stand has been developed to simulate the design of the pressurizer of the PWR-440 reactor, in particular an elliptical shape of the upper lid which has a steam outlet pipe at the top of the construction that creates conditions for occurrence of such water hammers. For the experiments, an installation has been created that makes it possible to measure and record the water hammering that occur when the tanks are filled. Measurement of the amplitude of the water hammering was carried out by a specially developed piezoelectric sensor, and the registration – by a light-beam oscilloscope. The technique of carrying out the experiment is described and the results of an experimental study of the water hammers arising when the vessels are completely filled are presented. Quantitative data were obtained on the amplitudes of the hydraulic impacts depending on the rate of filling of the vessel and the diameter of the outlet, the maximum pressure of the hydraulic shock was 7–9 atm. Comparison of calculated and experimental data has been performed. The allowable discrepancy is explained by the calculated value of the system stiffness coefficient, which did not take into account the presence of welded seams in the tank that imparts the system with additional rigidity. The calculated relationships are obtained, that make it possible to estimate the amplitudes of the water hammers through the acceleration of the water level in front of the outlet from a vessel with an elliptical bottom. The possibility of a water hammer in the pressure compensator is demonstrated by experiment and by theoretical calculations. Based on the experimental data, a list of initial events of severe accidents at NPPs with a water-cooled and water-moderated power reactor can be expanded.
THE USE OF AIR LAYERS IN BUILDING ENVELOPES FOR ENERGY SAVING DURING AIR CONDITIONING
Authors: Osipov S. N. , Danilevskiy S. L. , Zacharenko A. V.
Published: July 2018

Since there are no large natural energy resources in Belarus, energy savings ought to be a point of the special attention. With this regard it is important to develop modern ways of savings during the process of air conditioning inside new buildings with an air layer in the enclosure, especially in translucent ones. The system of ventilation of air layers in the enclosure of a building has been introduced in which air movement is caused by the gravitational and aerodynamic forces. It makes it possible to arrange further ventilation – a natural, forced or a hybrid one. With the purpose of increasing and streamlining natural draught the partitions are used separating the different parts of air layers. For natural ventilation with the use of gravitational forces the holes in the upper and lower parts of the partitions between adjacent air layers are applied. Natural ventilation in the holes of the partitions is regulated by movable shutters, blinds or other adjusting devices. For combined or forced air exchange between adjacent zones of air layers fans are used pumping air from the air layer zones with a higher temperature to zones of air layers with lower temperature and vice versa. When air exchange is forced, in order to intensify the infiltration of air into zones of air layers jets are laid on a hard surface. In order to cool a multi-layered enclosure of a building, where the movement of air between the air layers (that have been formed by internal partitions) is being fulfilled by a natural, forced or combined mode, a part of the air or the total air processed inside the building (i.e. conditioned or non-conditioned air cooler as compared with the outside one) is being sent to these strata. Combined or forced flow of the air processed inside the building into the air layers is done through the ducts associated with the output channels of the air conditioners. The internal partitions are equipped with the air valve hole.
ANALYSIS AND PARAMETRIC OPTIMIZATION OF ENERGY-AND-TECHNOLOGY UNITS ON THE BASIS OF THE POWER EQUIPMENT OF COMPRESSOR PLANTS OF MAIN GAS PIPELINES
Authors: Sednin V. A. , Abrazovskii A. A.
Published: July 2018

On the basis of the gas compressor units of compressor plants of a main gas pipeline mathematical models of the macro-level were generated for analysis and parametric optimization of combined energy-and-technology units. In continuation of the study these models was applied to obtain the regression dependencies. For this purpose, a numerical experiment was used which had been designed with the use of regression analysis mathematical tool, which assumes that the test results should represent independent, normally distributed, random variables with approximately equal variance. Herewith we study the dependence of the optimization criterion on the value of control parameters (factors). Planning, conducting and processing of results of the experiment was conducted in the following sequence: choice of the optimization criteria, selection of control parameters (factors), encoding factors, the matrix of experiment compiling, assessing significance of regression coefficients, testing the adequacy of the model and reproducibility of the experiments. As the optimization criteria the electricity capacity and efficiency of combined energy-technology units were adopted. As control parameters for the installation with a gas-expansion-and-generator machine the temperature of the fuel gas before the expander, the pressure of the fuel gas after the expander and the temperature of the air supplied to the compressor of the engine were adopted, while for the steam turbine the adopted optimization criteria were compression in the compressor of the engine, the steam consumption for the technology and the temperature of the air supplied to the compressor of the engine. The application of the outlined methodological approach makes it possible to obtain a simple polynomial dependence, which significantly simplify the procedures of analysis, parametric optimization and evaluation of efficiency in the feasibility studies of the options of construction of the energy facilities.
ECOLOGICAL AND ECONOMIC EFFICIENCY OF TRADITIONAL AND ALTERNATIVE METHODS OF ELECTRICAL ENERGY PRODUCTION WITH THE FEATURES OF THE ISLAMIC REPUBLIC OF IRAN
Authors: Mehdizadeh M. А. , Kalinichenko A. S. , Laptyonok S. A.
Published: July 2018

The problems of energy, environment protection and ecology play a major role in the development of economy strategy in any country. Most of the traditional power stations operating on organic fuels have a negative impact on the environment. Furthermore, there is a depletion of natural resources due to human activities. One of the ways to solve the problem of environmentally friendly energy production is to use alternative sources of energy. Based on the foregoing, the development of the strategy for the development of traditional and alternative energy must consider environmental and economic factors in a specific country. In the present work it was evaluated the environmental and economic efficiency of application of traditional and alternative energy with regard to the conditions of the Islamic Republic of Iran. The program packages RETScreen which is one of the most effective tools to accomplish the task was used. Calculations of cumulative cash flow from the operation of power plants using different types of primary energy are carried out using models of package RETScreen for assessing the input efficiency of various types of energy sources aiming to cover the intending growth in electricity demands and the environmental assessment with reference to different countries. The results of the study showed that the planning prospects of the development of energy systems in relation to the Islamic Republic of Iran to cover the expected growth in electricity demands it is advisable to use the alternative energy sources, and, first of all, the generating capacity based on solar and wind energy.