bluuebunny/crossref_metadata_2025_split huggingface dataset:
Géométrie est plus que ses Axiomes
Authors: Boi Luciano 
Published: June 2021

Les théories mathématiques cherchant Ã comprendre les structures géométriques et topologiques du monde naturel et de celui de la perception, ainsi que les relations qui se tissent entre eux, sont ouvertes et incomplètes. Le champ conceptuel de la géométrie ne peut pas être réduit Ã un système fini d’axiomes. D’abord, la recherche de la signification des concepts mathématiques ne s’identifie pas Ã la logique de leur démonstration; et la vérité des propositions doit aussi être distinguée de leur démonstration (cf. les exemples de mathématiques et de physiques non dénombrables). Ensuite, on peut associer Ã la géométrie (ou Ã d’autres domaines des mathématiques) un certain pouvoir morphogénétique, donc ontogénétique - cf. l’exemple des symétries et celui des formes naturelles, et les repliements/entrelacements dans le monde vivant. La géométrie est un ‘langage’ pluridimensionnel et polysémique: langage de l’imagination et de l’invention de concepts, et aussi de la nature et du vivant. Les concepts de groupe et de nœud sont transversaux: ils recoupent les différentes dimensions et significations de ce qu’est la géométrie.
Estoicismo, Ceticismo e Consciência Infeliz
Authors: Raskin Henrique 
Published: June 2021

O presente artigo busca sugerir que, já na Fenomenologia do Espírito (1807), Hegel desenvolve uma leitura historicista do desenvolvimento do direito na modernidade. Escrita a partir de metáforas, propomos que a tríade estoicismo, ceticismo e consciência infeliz referenciaria o percurso do pensamento moderno, perpassando a doutrina do contrato social, o construtivismo moral de Kant, e a eticidade hegeliana ”“ lida, aqui, a partir do entendimento de que o direito se subjuga Ã ética contextualmente situada, manifesta na religião. As consequências para essa leitura consolidam-se na percepção de que Hegel, na Fenomenologia do Espírito, traça a visão de que é preciso superar o dualismo entre consciência e natureza, a fim de compreender que a própria experiência ética fornece os termos da razão que, por sua vez, reflete e incorpora a natureza.
"O Marrocos ou a prescrição em termos de roubo" de Simone Weil
Authors: Lacour Philippe , Oliveira Chaia Jade , Matos Lima Melo Felipe , Mendes Sbervelheri Mariana , Mucury Teixeira Manuella , Alves Teixeira Michelly , Ceppas Filipe 
Published: June 2021

A tradução da presente obra foi realizada pelo Grupo de Tradução do Departamento de Filosofia da Universidade de Brasília, coordenado pelo professor doutor Philippe Lacour. O grupo se propõe traduzir regularmente obras de filosofia francesa ainda inéditas em língua portuguesa. O trabalho de tradução é produzido de maneira colaborativa através da plataforma digital TraduXio (https://traduxio.org/).
Optimization of operating modes of the main oil pipeline according to the criterion of minimum costs for electric energy payment
Authors: Лурье Михаил Владимирович , Штанько Екатерина Олеговна 
Published: June 2021

Рассматривается вопрос о выборе оптимального плана эксплуатации технологического участка магистрального нефтепровода при различных производительностях. В качестве критерия оптимальности принимается минимум суммарных денежных затрат на оплату потребляемой электрической энергии. При изменении планов поставок нефти приходится решать вопрос, является ли новый вводимый режим оптимальным, какова будет величина требуемой дополнительной или неизрасходованной электроэнергии, какие поправки требуется вносить в заявку на электроэнергию. В этой связи определение корректного способа вычисления и сравнения энергопотребления при планировании режимов работы магистрального нефтепровода для разных, изменяющихся планов перекачки является актуальной и важной задачей. Предлагается двухэтапный алгоритм определения оптимального графика работы технологического участка нефтепровода путем решения задачи линейного программирования, сформулированной таким образом, чтобы учесть все особенности расчета стоимости потребленной электрической энергии. Приводится пример расчета с использованием предлагаемого алгоритма.
The article considers the issue of choosing the optimal operating schedule for the technological section of the main oil pipeline at various pumping capacities. The optimality criterion is the minimum of total monetary expenses for payment of electric energy consumed for the oil pumping process. It is necessary to decide whether the new regime being introduced is optimal, what amount of additional or unspent electricity will be required, and how much it is needful to adjust the electricity demand when changing oil-pumping plans. In this regard, determining how to correctly calculate and compare energy consumption when planning the operation modes of the main oil pipeline for different, changing pumping plans is an urgent and important task. A two-stage algorithm for determining the optimal operating schedule of the oil pipeline technological section is proposed. The proposed method consists in solving a linear programming problem formulated in a way that takes into account all features of calculating the cost of consumed electrical energy. An illustrative example of calculation using the proposed algorithm is given.
РОЛЬ МОВИ У КОНТЕКСТІ ІДЕНТИЧНОСТІ ТА АКУЛЬТУРАЦІЇ МІГРАНТІВ
Authors: Тарасюк Інна 
Published: June 2021

Мета. Сучасний політичний та суспільний розвиток актуалізує значення мови в контексті національної, культурної та соціальної ідентичності особистості. Особливого значення питання мови та її функцій набуває в руслі успішної інтеграції мігрантів у іншомовному середовищі. Згідно з актуальними дослідженнями та опитуваннями населення в мультикультурних суспільствах, мові належить вирішальне значення в процесі інтеграції, а відтак сприяє успішній акультурації мігрантів. Метою статті є здійснити огляд та проаналізувати наявні теорії мовної комунікації в контексті ідентичності особистості.
Методи. Для реалізації поставленої мети було використано базові теоретичні методи дослідження, а саме: аналіз, синтез, порівняння та узагальнення.
Результати. Дослідницький центр П'ю у Вашингтоні 2017 року оприлюднив результати опитування мігрантів по всьому світі, котрі засвідчують, що саме володіння мовою домінантної більшості є надважливою передумовою, аби стати повноцінною частиною суспільства, бути інтегрованим та визнаним у ньому. Для поглибленого вивчення впливу мови на життя мігрантів у іншомовному середовищі було розроблено багато теорій з мовної комунікації. Одна з найбільш відомих теорій у контексті теми ідентичності є теорія соціальної ідентичності (SIT), за якою мова є ознакою, через яку особистість сигналізує свою соціальну ідентичність та належність до певної групи. Теорія етнолінгвістичної ідентичності (EIT) фокусує увагу на взаємозалежності між етнічною та мовною ідентичністю. В центрі уваги не лише мовленнєві дії, але й соціально-психологічні процеси, котрі лежать в основі міжкультурної комунікації. У центрі теорії комунікативної адаптації (CAT) – соціально-психологічні фактори, що впливають на процес комунікації між різними, несхожими мовцями. В процесі такої комунікації відбувається усунення мовленнєвих відмінностей або ж навпаки наголошення на них (приміром через діалект або соціолект).
Висновки. В контексті акультурації мові належить беззаперечно важлива функція, адже завдяки їй відбувається обмін інформацією про належність до тієї чи тієї групи. Діалекти та акценти надають інформацію про регіональне походження. Через соціолекти мігранти ідентифікують себе з певними соціальними групами. Знання мови домінантної більшості відкриває додаткові перспективи для навчання та праці, а знання мови свого етносу дає можливість не втрачати зв’язків зі своєю етнічною спільнотою. Це і є основним принципом інтеграції, а відтак і успішної акультурації. Отримані висновки та узагальнення будуть використані нами в емпіричному дослідженні психології акультурації іноземних студентів до іншомовного середовища.
Pengaruh CAR dan FDR Terhadap Pembiayaan Murabahah dengan NPF Sebagai Variabel Moderating
Authors: Yulyani Evita , Diana Nana 
Published: June 2021

This study aims to know the effect of CAR and FDR variables on Murabahah financing partially and simultaneously, besides, this study also examined the influence of NPF variables in moderating the relationship between independent variables and Murabahah financing. This research is a quantitative study with a sample of 11 (eleven) Syariah Commercial Banks registered with the Otoritas Jaa Keuangan in 2015-2019 that meet the researchers' criteria. The data used in this study is secondary data in the form of financial statements obtained from the website of each bank that is a sample of research. The results showed that CAR had no effect and significant on Murabahah financing, FDR had no effect and significant on Murabahah financing, and also simultaneously CAR and FDR did not affect muarabah financing. On the other side, the NPF as moderating variable show that a map to the CAR on Murabahah financing, the NPF moderating the FDR on Murabahah financing, and also the NPF moderating the influence of CAR and FDR on Murabahah financing simultaneously.
Sala de aula invertida e aprendizagem de temas financeiros-econômico
Authors: Oliveira Izabela Badaro Machado de , Kistemann Junior Marco Aurélio 
Published: June 2021

Em busca de aulas que contribuam para o protagonismo aos estudantes, metodologias de aprendizagem vêm sendo pesquisadas como estratégias para propiciar uma aprendizagem com significado e que contemple todos os estudantes. Esta pesquisa faz parte de um estudo de caso exploratório que está investigando uma turma do primeiro ano do Ensino Médio, na rede particular de ensino, que está tendo aula no formato do Ensino Remoto Emergencial, e que pretendemos trabalhar no contexto de sala de aula invertida (SAI). Compreendemos que a (SAI) por si só não é suficiente para garantir qualidade na aprendizagem. Preocupados em garantir uma educação que promova a criticidade e a reflexão dos estudantes em relação à Matemática, estamos planejando atividades Educação Financeira com objetivo de estudar os conteúdos de Função Exponencial e Logarítmica em uma perspectiva crítica. Utilizamos para pesquisa a metodologia estudo de caso, em uma escola de rede particular de ensino, na cidade de Leopoldina-MG, com turma do primeiro ano do ensino médio. Investigamos o uso da metodologia Sala de Aula Invertida (SAI), e inserção de temas financeiro-econômicos. Utilizamos as ferramentas de apoio: o Google classroom, Google meet, WhatsApp, Youtube e Edpuzzle. Essas ferramentas auxiliaram significativamente na comunicação entre estudantes e professor.
Palavras-chave: Educação Financeira Crítica – Sala de Aula Invertida – Ambientes Virtuais.
análise de vídeos de canais do Youtube como recursos didáticos para o ensino de operações de adição e subtração na educação infantil
Authors: Lozada Claudia de Oliveira , Santos Bruna Gama dos , Lima Cryslãne de Araújo 
Published: June 2021

O desenvolvimento de noções aritméticas na Educação Infantil ocorre através do campo de experiência “Espaços, tempos, quantidades, relações e transformações” previsto na Base Nacional Comum Curricular (BNCC). Assim, por meio de atividades lúdicas, a criança vivenciará situações nas quais poderá compreender e construir o senso numérico mobilizando processos cognitivos essenciais como contagem e quantificação que auxiliarão posteriormente no entendimento das estruturas aditivas onde se inserem as operações aritméticas básicas, como adição e subtração. No entanto, é necessário que o professor utilize recursos variados para promover vivências matemáticas significativas que promovam a aprendizagem de noções aritméticas. Desta forma, este trabalho teve como foco a análise de vídeos de quatro canais do YouTube que abordam as operações de adição e subtração na Educação Infantil, tendo como principais pontos de análise, a didática, o layout e a existência de personagens. Para tanto, realizamos uma breve pesquisa bibliográfica para entender melhor o que a BNCC e os teóricos que estudam os processos cognitivos de assimilação de conceitos matemáticos como Vergnaud (1990), Piaget (1975) e Kamii (2012) falam a respeito do ensino das operações de adição e subtração na Educação Infantil e identificar se os vídeos auxiliam na mobilização desses processos. Os vídeos analisados se mostraram atrativos pelas animações coloridas e motivadoras através das variadas situações-problema e histórias que servem para desenvolver o processo de contagem, ordenação, comparação, quantificação, entretanto, percebemos também que as operações de adição e subtração não trouxeram situações-problema desafiadoras e estavam fortemente ligadas à fixação repetitiva e exposição dos algoritmos, relacionando o numeral às quantidades. Mesmo com este tipo de ênfase presente, os vídeos analisados constituem um material potencialmente significativo para o ensino de adição e subtração na Educação Infantil e seu uso requer o planejamento da aula, combinando-os com outras atividades de modo que promovam o desenvolvimento de outras habilidades aritméticas.
Palavras-chave: Adição e Subtração; Ensino de Matemática; Educação Infantil.
Influence of Bondcoat Topography on the Properties of Suspension Sprayed YSZ Thermal Barrier Coatings
Authors: Toma Filofteia-Laura , Sagel Julia , Leyens Christoph , Slámečka Karel , Tkachenko Serhii , Čelko Ladislav 
Published: June 2021

Abstract
Intensive R&D work of more than one decade has demonstrated many unique coating properties, particularly for oxide ceramic coatings fabricated by suspension thermal spraying technology. Suspension spraying allows producing yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBC) with columnar microstructure, similar to those produced by electron-beam physical vapor deposition (EB-PVD), and vertically cracked morphologies, with a generally low thermal conductivity. Therefore, suspension sprayed YSZ TBCs are seen as an alternative to EB-PVD coatings and those produced by conventional air plasma spray (APS) processes. Nonetheless, the microstructure of the YSZ topcoat is strongly influenced by the properties of the metallic bondcoat. In this work, direct laser interference patterning (DLIP) was applied to texture the surface topography of Ni-alloy based plasma sprayed bondcoat. Suspension plasma spraying (SPS) was applied to produce YSZ coatings on top of as-sprayed and laser-patterned bondcoat. The samples were characterized in terms of microstructure, phase composition and thermal cycling performance. The influence of the bondcoat topography on the properties of suspension sprayed YSZ coatings is presented and discussed.
MCrAlX (X = Y, Hf and Si) Bond Coats by Cold Spray for High Temperature Applications
Authors: Cojocaru Cristian V. , Aghasibeig Maniya , Irissou Eric 
Published: June 2021

Abstract
MCrAlX powder compositions (M=Ni, Co and X=Y, Hf, Si or combination) are often thermally sprayed (TS) via vacuum plasma spray (VPS), low pressure plasma spray (LPPS) or high velocity oxy-fuel (HVOF) to produce high temperature oxidation and hot corrosion resistant bond coats (BC) for thermal barrier coatings (TBCs). Cold spray (CS) technology is currently considered as a promising alternative to the traditional TS solutions having the advantage of delivering oxide-free and very dense metallic coatings at relatively lower costs compared to VPS and LPPS. Here, we first present high-pressure CS deposition of NiCoCrAlY and NiCoCrAlYHfSi and discuss the influence of feedstock properties on the deposited BCs. CFD numerical simulation is employed to tailor the spray conditions based on the feedstock characteristics. Secondly, we present the laser assisted cold spray (LACS) deposition of NiCoCrAlYHfSi BCs using a low-pressure CS system. We show that LACS can be successfully used to deposit this particular powder while eliminating nozzle erosion and low deposition efficiency disadvantages observed during conventional CS. Lastly, high temperature isothermal oxidation of a TBC architecture having LACS BC is presented.
Cold Spray of Metallic Coatings on Polymer Based Composites for the Lightning Strike Protection of Airplane Structures
Authors: Delloro F. , Chebbi A. , Perrin H. , Ezo’o G. , Bastien A. , Ascani J. , Tazibt A. 
Published: June 2021

Abstract
Unlike their metal counterparts, composite structures do not readily conduct away the electrical currents generated by lightning strikes. Cost reduction and expected production growth of the next middle range airplanes require automated manufacturing process of polymer components. The development of an automated technology to metallize polymer based composite for lightning strike protection is the aim of the CO3 project (EU Grant agreement: ID831979). In this study, thermal and electrical conductivities of composites were achieved by cold spray deposition of Cu or Al coatings. Critical points to be addressed were substrate erosion during cold spray, lack of polymer-metal adhesion and poor deposition efficiency. Several strategies were tested: i) a thin polymer film was cocured at the substrate surface before cold spraying, to enable implantation of metallic particles in the film, helping coating build-up and protecting the fibers of the composite. ii) Cold spraying a mix of metal and polymer powders to improve coating adhesion and prevent fiber damage. iii) Supercritical Nitrogen Deposition technology, prior to cold spray, to mechanically anchor metallic particles into the polymer. Subsequent cold spraying of purely metallic coatings was more efficient and showed better adhesion. All coatings were tested in terms of adhesion strength and electrical conductivity.
Simulation Study on Microstructure Development in a MCrAlY Superalloy System
Authors: Yuan Kang , Zheng Zhaoran 
Published: June 2021

Abstract
In this paper, a diffusion kinetic model was applied to simulate the microstructure development in a MCrAlY-superalloy system at high temperatures. Both simulation and experimental results showed that γ+γ’ microstructure was obtained in the coatings due to Al depletion after oxidation. With the help of the modelling, the mechanism of the formation of the diffusion zones in the single crystal (SC) superalloy can be also analyzed. The results revealed that the inward diffusion of Al from coating affected the depth of secondary reaction zone (SRZ) with the precipitation of TCP phases while the depth of inter-diffusion zone (IDZ) was decided by the inward diffusion of Cr.
Mechanical and Fatigue Properties of Tungsten Heavy Alloy Prepared by RF-Plasma
Authors: KovářÍk Ondřej , Čech Jaroslav , Cizek Jan , Klečka Jakub , Hajíček Michal 
Published: June 2021

Abstract
Tungsten heavy alloy (WHA) of W-Ni composition was deposited from a blend of standard thermal spray powders using a radio frequency inductively coupled plasma torch in a protective atmosphere. The coating contained a fully developed WHA structure, i.e., spherical W particles embedded in a Ni-rich matrix. Bending tensile strength Rm, bending yield strength Rp,0.2, and elastic modulus were measured and compared with W-Ni-Co references fabricated by sintered and quenched (SQ) and forged and annealed (FA) powder metallurgy (PM) processes. The fatigue and fracture properties of the plasma spray deposits are comparable with those of the SQ-PM reference material, but inferior to those of the FA-PM reference. The results of various property tests are presented and analyzed in the paper.
Investigation of Agglomerated and Porous Ceramic Powders Suitable for Cold Spray
Authors: Celeste Geoffrey , Guipont Vincent , Missoum-Benziane Djamel 
Published: June 2021

Abstract
Cold gas spraying is a solid-state deposition process developed for metallic powders as feedstock materials. For ceramic materials; such low temperature-high velocity kinetic process is still questionable but could have interesting advantages. In the CERASOL project (ANR-19-CE08-0009); the nature and the architecture of porous ceramic powders involving agglomerated sub-micrometric grains are investigated. To that purpose; three oxide ceramics powders (alumina; zirconia and yttria) have been prepared for cold spray. These powders were analyzed in order to assess their architecture (composition; particle size; porosity; density; crystallite sizes…). Preliminary cold spray experiments were carried out implementing velocities measurements for various stand-off distances and spraying of coupons with line experiments. The characteristics of the deposited layers have been examined by SEM and XRD in order to discuss the role of the powder architecture on the impact behavior of the nanostructured agglomerated particles. The role of the gas stream that affects the kinetic and the trajectory of the particles are also discussed.
Cold Sprayed Tungsten Armor for Tokamak First Wall
Authors: Cizek Jan , Vilemova Monika , Lukac Frantisek , Koller Martin , Kondas Jan , Singh Reeti 
Published: June 2021

Abstract
This study investigates the potential of cold-sprayed tungsten coatings for use in nuclear fusion reactors. Three commercially available tungsten powders were selected from which six series of feedstock were prepared. The feedstocks were deposited on aluminum, steel, and stainless steel substrates using high-pressure nitrogen cold spraying. The coatings produced were characterized based on SEM, EDX, and XRD analysis and were found to be free of oxides with levels of tungsten that were previously unachieved. The results indicate that cold spraying is a viable technology for applying tungsten-base coatings to critical components in nuclear fusion equipment.
Cold Spray Technology for Oxidation-Resistant Nuclear Fuel Cladding
Authors: Dabney Tyler , Yeom Hwasung , Quillin Kyle , Pocquette Nick , Sridharan Kumar 
Published: June 2021

Abstract
Light water reactors (LWR) use zirconium-alloy fuel claddings, the tubes that hold the uranium-dioxide fuel pellets. Zr-alloys have very good neutron transparency, but during a loss of coolant accident or beyond design basis accident (BDBA) they can undergo excessive oxidation in reaction with the surrounding steam environment. Relatively thin oxidation-resistant coatings on Zr-alloy fuel cladding tubes can potentially buy coping time in these off-normal scenarios. In this study, cold spraying, solid-state powder-based materials deposition technology has been developed for deposition of oxidation-resistant Cr coatings on Zr-alloy cladding tubes, and the ensuing microstructure and properties of the coatings have been investigated. The coatings when deposited under optimum conditions have very good hydrothermal corrosion resistance as well as oxidation resistance in air and steam environments at temperatures in excess of 1100 °C, while maintaining excellent adhesion to the substrate. These and other results of this study, including mechanical property evaluations, will be presented.
Powder Impact Temperature Influence on Metallurgical Bonding—An Investigation for Soft Particle Deposition on Hard Substrate
Authors: Nastic A. , Jodoin B. , Poirier D. , Legoux J.-G. 
Published: June 2021

Abstract
Segregating the convoluted effects of particle size, impact temperature and velocity on deposition behavior and adhesion is of utmost interest to the cold spray field. The current study aims to associate the particle impact behavior and adhesion to its in-flight characteristics by studying and decoupling the influence of particle size, temperature and velocity for single particle impacts and full coatings. Experimental results reveal that in-situ peening processes contribute to the adhesion at low impact temperature while particle velocity controls the adhesion/cohesion at increased particle impact temperatures. The benefits of both bonding mechanisms are discussed in terms of measured adhesion/cohesion, bend-to-break fracture surfaces, pseudoplasticity, deposition efficiency and critical velocity. Computational fluid dynamics (CFD) results provide individual particle trajectory, size, temperature and velocity, of successfully deposited particles, which have led to the observed signs of metallurgical bonding.