bluuebunny/crossref_metadata_2025 huggingface dataset:
Assessment of Steady and Unsteady Friction Models in the Draining Processes of Hydraulic Installations
Authors: Coronado-Hernández Óscar E. , Derpich Ivan , Fuertes-Miquel Vicente S. , Coronado-Hernández Jairo R. , Gatica Gustavo
Published: July 2021

The study of draining processes without admitting air has been conducted using only steady friction formulations in the implementation of governing equations. However, this hydraulic event involves transitions from laminar to turbulent flow, and vice versa, because of the changes in water velocity. In this sense, this research improves the current mathematical model considering unsteady friction models. An experimental facility composed by a 4.36 m long methacrylate pipe was configured, and measurements of air pocket pressure oscillations were recorded. The mathematical model was performed using steady and unsteady friction models. Comparisons between measured and computed air pocket pressure patterns indicated that unsteady friction models slightly improve the results compared to steady friction models.
Impact of specialist training on the social consequences of innovation processes
Authors: Filin S. A. , Yakushev A. Zh.
Published: July 2021

Management is a system of ideas and techniques for building and managing organizations effectively. The prospects for the development of Russian management are determined by the development of market relations in the state. Today, in the context of Russia’s transition to an innovative way of development, the issue of shortage of professional personnel in the field of management has become even more urgent. Special attention should be paid to studies showing the social significance of the innovation process.
Embedding Cobalt Into ZIF-67 to Obtain Cobalt-Nanoporous Carbon Composites as Electrode Materials for Lithium ion Battery
Authors: Zheng Guoxu , Yin Jinghua , Guo Ziqiang , Tian Shiyi , Yang Xu
Published: July 2021

Lithium ion batteries (LIBs) is a kind of rechargeable secondary battery, developed from lithium battery, lithium ions move between the positive and negative electrodes to realize the charging and discharging of external circuits. Zeolitic imidazolate frameworks (ZIFs) are porous crystalline materials in which organic imidazole esters are cross-linked to transition metals to form a framework structure. In this article, ZIF-67 is used as a sacrificial template to prepare nano porous carbon (NPC) coated cobalt nanoparticles. The final product Co/NPC composites with complete structure, regular morphology and uniform size were obtained by this method. The conductive network of cobalt and nitrogen doped carbon can shorten the lithium ion transport path and present high conductivity. In addition, amorphous carbon has more pores that can be fully in contact with the electrolyte during charging and discharging. At the same time, it also reduces the volume expansion during the cycle and slows down the rate of capacity attenuation caused by structure collapse. Co/NPC composites first discharge specific capacity up to 3115 mA h/g, under the current density of 200 mA/g, circular 200 reversible capacity as high as 751.1 mA h/g, and the excellent rate and resistance performance. The experimental results show that the Co/NPC composite material improves the electrical conductivity and electrochemical properties of the electrode. The cobalt based ZIF-67 as the precursor has opened the way for the design of highly performance electrodes for energy storage and electrochemical catalysis.
Lippia (Verbenaceae) do Brasil: atualização taxonômica, biogeografia e conservação
Authors:   , Valério Vanessa Imaculada dos Reis
Published: July 2021

O Brasil enfrenta uma grave crise ambiental que está colocando em risco toda a biodiversidade e é o principal centro de riqueza do gênero Lippia, compreendendo um alto número de endemismos, espécies raras e ameaçadas. Lippia destaca-se pela sua variedade química com grande potencial farmacológico, compreendendo 140 espécies. Está representado no Brasil por 87 espécies, sendo 63 endêmicas, caracterizadas por uma distribuição majoritariamente restrita ou microendêmica, com maior riqueza e endemicidade no Cerrado e campos rupestres da Cadeia do Espinhaço, especialmente na Serra do Espinhaço Meridional situada em Minas Gerais, estado responsável pelo maior número de espécies ameaçadas. Problemas taxonômicos envolvendo a relação muito próxima entre Lippia e Lantana refletem em análises não confiáveis e falsas conclusões sobre a riqueza, distribuição e risco de extinção com graves consequências para a conservação das espécies. A ausência de um estudo amplo para o gênero no Brasil, representa um agravante que impede a real dimensão do seu estado de conservação. Como parte dos estudos para a Flora do Brasil 2020, este trabalho buscou analisar os materiais de Lippia e Lantana disponíveis em coleções botânicas virtuais (Reflora e speciesLink) a fim de corrigir problemas de identificação para a formação de um banco de dados confiável, base para atualização da distribuição, análises biogeográficas (Análise de Parcimônia de Endemismo e de Endemicidade) e definição do status de conservação das espécies endêmicas do Brasil. Foram analisados 17.821 espécimes, 11.040 do gênero Lippia e 6.781 de Lantana, sendo que 3.182 exsicatas tiveram suas identificações atualizadas. Foram corrigidos 194 registros de ocorrência para os estados, domínios fitogeográficos e fitofisionomias, sendo que 29 táxons tiveram sua distribuição ampliada, enquanto nove tiveram sua distribuição recircunscrita. A avaliação do status de conservação das espécies mostrou que cerca de 97% dos táxons endêmicos do Brasil foram incluídos em alguma categoria de ameaça (sete como “Criticamente em Perigo”, 20 “Em Perigo” e 36 “Vulnerável”), mesmo aquelas inseridas dentro de UCs, principalmente em função de atividades agrícolas, desmatamento e incêndios, revelando que quase metade das espécies do gênero encontra-se ameaçada. Entre os domínios, o Cerrado detém o maior número de espécies incluídas em categorias de ameaça (47), sendo um dos mais impactados pelo desmatamento que vem devastando sua cobertura vegetal nativa. São necessárias com urgência, políticas de conservação direcionadas, especialmente para o Cerrado e campos rupestres, evitando que várias espécies possam ser extintas a nível global.
No passo, no compasso e no tecer de travessias: narrativas de jovens e adultos de uma escola da rede municipal de Juiz de Fora
Authors:   , Pereira Anamaria Paixão
Published: July 2021

O presente trabalho, desenvolvido no Programa de Pós-Graduação em Educação da Universidade Federal de Juiz de Fora, foi realizado em uma escola da rede municipal de ensino de Juiz de Fora, atravessada por um período de pandemia do Covid-19, com estudantes da Educação de Jovens e Adultos. A partir de cartas trocadas entre pesquisadora e estudantes, buscou-se refletir a respeito das relações socioculturais que perpassam a vivência do espaço escolar em relação à figura do jovem e adulto e como se construiu a sua inserção no processo educativo. Nesse sentido, buscou-se abordar as especificidades desse público historicamente marcado por preconceitos inerentes de raízes surgidas desde a colonização do nosso país, evidenciando-se, até os dias de hoje, discursos e práticas escolares não condizentes com as reais necessidades destes estudantes. Assim, o objetivo foi compreender como o estudante jovem ou adulto traz, em sua vivência, por meio de suas narrativas reveladas, significados em relação ao espaço escolar a partir do retorno aos estudos. A elaboração do percurso, construído e consolidado por meio das narrativas de histórias das escutas das vozes, tece, como uma rede, a constituição dos sujeitos e o significado que estes dão às suas vidas e à escola.
O estudo da variação linguística nas aulas de Língua Portuguesa do Ensino Fundamental: uma proposta contra o preconceito linguístico e social
Authors:   , Coelho Carina de Almeida
Published: July 2021

Este trabalho pretende promover uma reflexão sobre a necessidade de um ensino de Língua Portuguesa mais sensível à variação linguística, a fim de desenvolver a competência comunicativa dos alunos e conscientizá-los acerca do preconceito linguístico e social. Para isso, assumindo uma perspectiva teórica embasada na Sociolinguística e, em especial, na Sociolinguística Educacional (BORTONI-RICARDO, 2004; 2005), serão analisados os conceitos de língua, linguagem, norma, variação e mudança linguística, além de serem tratadas questões sobre o preconceito linguístico e social, a relevância do conhecimento dos vários tipos de gramática e a importância do trabalho com os gêneros textuais no ensino de Língua Portuguesa. A proposta de intervenção pedagógica é direcionada a alunos do 8º ano do Ensino Fundamental II, de uma escola pública estadual do município de Juiz de Fora/MG, e tem como objetivo ampliar o conhecimento linguístico desses estudantes, nas mais diversas situações de fala e escrita, principalmente no que tange ao aspecto mais formal da língua, sem se desvalorizar ou negar a variante desses alunos. Para o alcance desse objetivo, o ponto de partida do projeto interventivo será o conhecimento prévio dos discentes, verificado numa fase pré-intervenção, após a qual será sugerida uma sequência didática com atividades, intermediadas pelos gêneros textuais (cf. DOLZ; NOVERRAZ; SCHNEUWLY, 2011), em particular, os gêneros entrevista, notícia e reportagem, do campo jornalístico-midiático, nos termos da Base Nacional Comum Curricular (2017), buscando a reflexão, a participação e o aprendizado dos alunos. Tal proposta interventiva se justifica pelo fato de a língua se constituir como um dos mais poderosos instrumentos de ação e transformação social, sendo a aprendizagem da norma-padrão fundamental para o exercício da cidadania. Esta dissertação fundamenta-se, ainda, nos Parâmetros Curriculares Nacionais (1998) e em referenciais teóricos, como os de Antunes (2007, 2009, 2014); Bagno (2001, 2002, 2004, 2007, 2012); Bortoni-Ricardo (2004, 2005, 2009, 2014); Marcuschi (2004, 2006, 2007, 2008, 2012), dentre outros.
Rede de invenção no Brasil: características e determinantes dos tipos de inventores
Authors:   , Reis Raquel Coelho
Published: July 2021

Esta tese apresenta três artigos que utilizam dados de copatenteamento das atividades inventivas no Brasil para investigar as características dos inventores e gatekeepers e os determinantes de seu desempenho inventivo. O primeiro artigo, “Tipos de interação e características dos grupos de inventores na rede de invenção no Brasil”, explora a relação entre as características do inventor e o tipo de interação deste com os demais inventores da rede. As interações podem ser nulas, locais, e/ou extrarregionais permitindo classificar os inventores em isolados, internal stars, external stars ou possíveis gatekeepers. O segundo artigo, “Identificação dos gatekeepers da rede de coinvenção do Brasil por diferentes métricas”, identifica os gatekeepers por diferentes medidas e investiga o perfil dos mesmos. O último artigo, “Determinantes do desempenho tecnológico de inventores e gatekeepers da rede de coinvenção do Brasil”, investiga o desempenho inventivo de coinventores brasileiros considerando a coexistência de efeitos multi-escalares. A tese permite compreender melhor o perfil dos inventores brasileiros, destacando a relevância dos gatekeepers para a rede. Os principais resultados apontam que coinventores possuem conhecimento educacional elevado e em alta tecnologia, permitindo inferir que redes de coinvenção possuem fluxo de conhecimentos mais complexos. Os possíveis gatekeepers, inventores com ligações internas e externas, possuem conhecimento educacional ainda mais elevado com títulos em pósgraduação, maior capacidade em absorver conhecimentos e são tecnologicamente mais especializados. No entanto, há sub ou superestimação de inventores classificados como gatekeepers dependendo da medida utilizada, sendo importante a aplicação conjunta de diferentes métricas. A maioria dos gatekeepers se concentram em São Paulo, Rio de Janeiro e Campinas, atuando nos tipos de instituições mais inventivas das regiões. Contudo, gatekeepers mais direcionados a obter ligações externas tendem a se localizar em regiões não metropolitanas, vistos como meio de suprir a escassez de conhecimentos locais. Por fim, é possível associar o desempenho inventivo de gatekeepers e coinventores principalmente às características individuais destes como o grau de diversificação e conhecimento em alta tecnologia, pertencimento à indústria e salários mais elevados. Além disso, atuar como gatekeeper, bem como ser relacionalmente próximo a estes inventores também influencia no desempenho inventivo de seus parceiros diretos, enquanto os aspectos regionais e de regiões próximas explicam, em menor grau, o desempenho inventivo dos inventores brasileiros.
Maladie et pratiques thérapeutiques en contexte bouddhique arakanais (ouest de la Birmanie)
Authors: Coderey Céline
Published: July 2021

En s’appuyant sur une étude de cas spécifique, cet article montre qu’en Arakan la maladie est un phénomène conçu comme résultant d’une imbrication de facteurs et géré par une variété de pratiques issues de différents domaines de savoirs et de techniques. Pour la soigner, malades et thérapeutes font appel aux ressources du bouddhisme theravāda, de l’astrologie, de l’alchimie, de la sorcellerie, des savoirs et pratiques ésotériques, de la médecine indigène et de la médecine scientifique d’origine occidentale — cela dans le cadre d’un parcours thérapeutique qui implique

une articulation entre ces différents domaines et dont la finalité est de garantir au

malade une protection-guérison aussi complète que possible en intervenant sur tous les facteurs à l’origine de la maladie.
Kausambi, ancien royaume mao. Les traces archéologiques du peuplement shan sur les hauts plateaux de Birmanie
Authors: Berliet Ernelle
Published: July 2021

Les processus d’urbanisation et d’occupation du territoire aux périodes anciennes sont depuis longtemps étudiés dans les zones côtières et insulaires de l’Asie du Sud-Est par rapport aux étendues continentales de la péninsule Indochinoise. Et dans ces régions mêmes, l’histoire de ces phénomènes demeure mieux connue dans les zones de plaines que dans les secteurs montagneux où, d’un point de vue général, peu d’études ont été menées. En dépit d’un fort potentiel archéologique, la Birmanie et plus particulièrement ses secteurs de hautes terres, notamment le pays shan, n’ont que très rarement fait l’objet de recherches dans ce domaine. Des prospections récentes menées en 2006 dans le nord-ouest de l’État shan ont révélé pour la première fois l’existence du fait urbain aux époques prémodernes et ont mis en lumière les vestiges de sites fortifiés jusque-là méconnus de l’ancien royaume Mao (vi e s. ?-xve s.). Bien que l’extension des prospections archéologiques soit nécessaire à l’ensemble du pays shan, cet article propose de présenter les résultats des premières prospections dans cette région, ainsi que les caractéristiques particulières de ces établissements de montagnes de l’ancien royaume Mao, Kausambi. Il vise, de plus, à établir des comparaisons préliminaires entre les établissements urbanisés dans deux contextes géographiques différents : ceux des zones de plaines et ceux des régions montagneuses de la Birmanie ancienne.
Le site géologique de l’ancienne cité de Châtel-Aillon (Castrum Allionis) et l’évolution de la côte de l’Aunis
Authors: Mathieu G.
Published: July 2021

Durant un séjour de six mois à Châtel-Aillon, tout en collectionnant les galets exotiques de la plage, l'auteur a pu observer les phénomènes littoraux et le régime de l'évolution du littoral d'Aunis.

Pour connaître les rivages successifs, il a dressé la carte du sous-sol à l'intérieur des terres depuis l'époque Gallo-Romaine, tandis que l'élude des falaises faite aux plus basses marées lui a permis de préciser certains points de tectonique sur les récifs du Cornard situés à 4 km. 5 en mer.

L'histoire locale, tracée par Amos Barbol, permet de dater exactement la suite des positions successives de la côte mieux que la faune des cordons littoraux, trop identique à la faune actuelle.

Celle élude montre donc l'utilité des faits historiques pour la géomorphologie d'une ligne de rivage en pleine évolution ; elle fait ressortir aussi l'influence de la tectonique sur la morphologie.
A propos d’une thèse de dialectologie : Les problèmes de peuplement du centre de la France
Authors: Bonnaud P.
Published: July 2021

Constatant que les géographes s'intéressent peu aux travaux des linguistes, l'auteur prend comme exemple d'ouvrage, pouvant leur fournir une moisson de faits et de sujets de réflexion, la thèse de M. J. Pignon sur l’«Évolution phonétique des Parlers du Poitou» et il rappelle les conclusions formulées par ce savant linguiste.

Examinant ensuite les problèmes du peuplement dans le Centre-Ouest et la bordure Nord du Massif Central, il fait connaître la signification de la ligne «Von Warlburg» que cet éminent linguiste a tracée de l'embouchure de la Loire au Nord du Morvan et à la Franche-Comté et qui, selon cet auteur, est la frontière primitive entre langue d'oc et langue d'oïl ; celte hypothèse sur l'origine du partage linguistique de la Gaule romane étant loin cependant d'être unanimement acceptée.

Puis l'auteur montre qu'entre la ligne Von Warlburg et l'actuelle limite occitane s'étend un vaste espace où existèrent dès l'origine deux groupes dialectaux, l'un occidental, l'autre oriental, dont la limite est actuellement encore indiscernable.

En conclusion, il souligne l'intérêt que les géographes peuvent trouver à la lecture des travaux des topongmistes et des dialectologisles et indique que, sans trop se hasarder lui-même sur des terrains qu'il vaut mieux laisser aux spécialistes, le géographe peut, en s'appuyant sur les travaux des linguistes, faire œuvre originale et constructive.
Remarques sur les destinations de l’émigration rurale en France
Authors: Lariviere Jean-Pierre
Published: July 2021

Durant la période 1962-1968 les émigrants ruraux, saisis par les tableaux MI du recensement de 1968, se dirigent essentiellement vers des communes urbaines. Seule une petite minorité va vers d'autres communes rurales en général très proches. Dans V ensemble, pour chaque département, le rayon dans lequel se font l'essentiel des déplacements est peu étendu, couvrant tout au plus la région à laquelle appartient le département et les quelques régions limitrophes. Les villes de leur département sont en importance la première destination des émigrés ruraux, suivie en deuxième position par les départements limitrophes du département de départ. L'émigration à longue distance est assez peu importante surtout pour les départements de la moitié orientale de la France. Elle se fait vers la Région Parisienne — avec une intensité très variable — et accessoirement vers le Sud-Est du pays.
Portugal, un pays de construction clandestine : analyse de la situation dans la zone de la Grande Lisbonne
Authors: Sanchez da Costa Pereira Pedro
Published: July 2021

Le Portugal et en particulier sa capitale, Lisbonne ont connu pour un ensemble de raisons une croissance de la construction dite clandestine qui atteint aujourd'hui des proportions alarmantes et dont la dynamique du processus ne permet pas d'entrevoir à court terme une solution définitive pour le problème.
Peripheral Insulin Resistance Is Associated with Copeptin in Patients with Chronic Kidney Disease
Authors: Arroyo Juan Pablo , Akwo Elvis A. , Terker Andrew S. , Alsouqi Aseel , Bhave Gautam , Harris Raymond C. , Hung Adriana M. , Ikizler T. Alp
Published: July 2021

Key Points

We found that elevated levels of copeptin are associated with peripheral insulin resistance in nondiabetic patients with CKD stage 3–4.

We found no correlation between copeptin levels and hepatic insulin resistance in patients with CKD stage 3–4 or in our control group.

Further research is warranted to establish potential mechanistic links between vasopressin and peripheral insulin resistance in CKD.

Background

Insulin resistance is associated with cardiovascular disease risk and worsened kidney function. Patients with CKD have higher levels of insulin resistance. Elevated levels of copeptin (a surrogate for vasopressin levels) have been associated with an increased incidence and progression of CKD, and with incident diabetes mellitus. The purpose of our study was to examine the relationship between insulin resistance, copeptin, and CKD.

Methods

We performed a cross-sectional study to investigate if insulin resistance was associated with higher copeptin levels in nondiabetic patients with stage 3–4 CKD versus controls. We measured plasma copeptin levels and used data from 52 patients with stage 3–4 CKD and 85 controls (eGFR ≥60 ml/min per 1.73 m2) enrolled in the Insulin Resistance in Chronic Kidney Disease (IRCKD) study. We then used a multivariable linear-regression model to assess the independent relationship between peripheral or hepatic insulin resistance and copeptin across levels of eGFR.

Results

We found that in patients with CKD (eGFR of 30–60 ml/min per 1.73 m2), but not in controls, peripheral insulin resistance was significantly correlated with higher levels of log copeptin (r=−0.21, P=0.04). In patients with CKD, when adjusted for age, sex, BMI, serum osmolality, log IL6, and log leptin/adiponectin ratio, each 1 SD decrease in insulin sensitivity was associated with a 39% increase in serum copeptin levels. The relationship between hepatic insulin resistance, copeptin, and eGFR is similar between controls and patients with reduced eGFR.

Conclusion

Peripheral insulin resistance is associated with elevated copeptin levels in nondiabetic patients with stage 3–4 CKD. Further research into how the interaction between peripheral insulin resistance and elevated vasopressin affects CKD progression could be of interest.
ARTICULAÇÕES ENTRE EDUCAÇÃO MATEMÁTICA, BRINCADEIRAS E CORPO EM MOVIMENTO NA EDUCAÇÃO INFANTIL NA PERSPECTIVA DA COMPLEXIDADE
Authors: Barbosa Paulo Robson , Guérios Ettiène
Published: July 2021

Este artigo tem como eixo norteador a Educação Matemática na Educação Infantil a partir do intercâmbio entre dois campos de experiências: “espaços, tempos, quantidades, relações e transformações” e “corpo, gestos e movimentos”, conforme documento normativo que orienta as práticas pedagógicas em território nacional, a Base Nacional Comum Curricular (BNCC). O objetivo do estudo concentra-se na análise da percepção de conhecimentos matemáticos em brincadeiras que envolvem o corpo em movimento por parte dos professores de Educação Infantil. A pesquisa de abordagem qualitativa e natureza exploratório-interpretativa reuniu como instrumentos de produção de dados questionário e roda de conversa com três professoras da Educação Infantil. A análise revela que as profissionais percebem a importância das brincadeiras que envolvem o corpo em movimento para formação de conhecimentos matemáticos na primeira infância. No entanto, reconhecem fragilidades conceituais em decorrência de precariedade na formação inicial. Os resultados permitem refletir sobre a relevância da Educação Matemática na Educação Infantil por meio das brincadeiras, evidenciando o corpo em movimento como alicerce para o desenvolvimento infantil.
Effect of Selenium on TNAZ Molecule - A DFT Treatment
Authors: Türker Lemi
Published: July 2021

The present treatment deals with an unusual composite of TNAZ that is TNAZ+ nSe(n:1,2) within the constraints of density functional theory at the level of UB3LYP/6-31++G(d,p). TNAZ is an insensitive high explosive material. Since, selenium atom in its ground state has two unpaired electrons, the composites are considered in their singlet, triplet and quintet states. Selenium and TNAZ interact at different extents and the systems are electronically stable but TNAZ+2Se (singlet) structurally decomposes by the elongation of one of the geminally substituted nitro groups. Modeling studies indicate that the N-O bond elongation in the composite mentioned occurs only if azetidine ring is present with or without the nitramine bond. For the composites various structural, electronic and quantum chemical data have been harvested and discussed.
Scientific Thoughts Revealed in Old Tamil Literature
Authors: Sathees Murukaiya
Published: July 2021

Scientific Thoughts Expressed by Old Tamil Literatures Synopsis Science is a scientific form of thought recorded in old Tamil literature.  Thoughts can be seen as expressions of the life activities of the people of that time.  Scientific ideas also merged with the ancient Tamils as they tended to adapt their lives to nature.  They have lived with biological, astronomical, mathematical, medical, biological, chronological, craft, geological, etc. scientific disciplines.  This study is aimed at identifying and documenting the reflections of such scientific ideas on how they have been studied in ancient Tamil literature.  The dissertation is characterized by the fact that the dissertation has been used extensively in old Tamil literature, as well as old Tamil essays, magazines, and electronic commentaries.  Based on these, the study concludes that Tamils have had the best scientific knowledge since the dawn of time.  Therefore, this study also suggests that many more studies should be carried out by researchers focusing on the ancient Tamil literature.
APPLICATION OF THE myPKFiT PROGRAM FOR AN INDIVIDUALIZED APPROACH TO PREVENTIVE TREATMENT WITH COAGULATION FACTOR VIII IN CHILDREN WITH HEMOPHILIA A OF THE CHELYABINSK REGION
Authors: Зуб Н.В. , Моисеева Л.В. , Башарова Е.В. , Спичак И.И.
Published: July 2021

Для пациентов, получающих лечение препаратом октоког альфа, разработано программное обеспечение (ПО) myPKFiT* на основе web-приложения, позволяющее моделировать режим дозирования с учетом фармакокинетического профиля пациента на основании определения активности F VIII в 2 образцах крови. ПО позволяет изменять (повышать) целевой уровень остаточной активности F VIII, учитывая образ жизни и уровень физической активности пациента. Возможности ПО позволяют наглядно продемонстрировать больному активность FVIII при различных дозах и интервалах введения препарата, а также обозначить риски, возникающие при пропуске приема препарата. Таким образом, myPKFiT решает важную задачу индивидуализированного подхода к подбору и коррекции терапии, способствует улучшению сотрудничества и взаимопонимания врача и пациента, повышению приверженности больного к терапии и достижению оптимальных результатов.
Políticas Institucionales contra las Violencias Machistas
Authors: Santervas Georgina
Published: July 2021

El artículo aborda la relevancia que tiene la conformación de colectivos de trabajo, en tanto colectivos de identificación, para el funcionamiento y la sostenibilidad de las cooperativas de trabajo, y en particular de aquellas que constituyen formas de asociatividad forzada o artificial. Se parte de un estudio de caso realizado en 2015 a partir de las cooperativas de trabajo creadas en el marco del Programa de la Micro Región de San Pedro y La Esperanza en Jujuy. El estudio realizado permite identificar variables que intervinieron en la formación de los colectivos de trabajo, ante la escasa atención que en el diseño e implementación del mismo se le dio a las relaciones interpersonales dentro de las cooperativas y al fortalecimiento de los lazos entre les integrantes de las mismas. Finalmente, se analiza cómo dichas variables posibilitaron o dificultaron que dentro de los colectivos constituidos predominaran lazos de confianza y cooperación, y se indaga en la incidencia esto tuvo para la identidad laboral de les trabajadores y su participación y permanencia en el programa.
LISBOA, Marcelino; SILVA, Micael; SAAVEDRA, Olga (Organizadores) (2020). Fronteiras e Relações Internacionais. Perspectivas a partir do Cone Sul. Ed. Appris. Curitiba
Authors: Capeletti Dalila Emilse
Published: July 2021

"Lo primero que debemos destacar es que no sólo el contenido, sino también el recorrido en la construcción de este libro es desde —y para— la frontera. La frontera entendida no sólo como un punto geográfico que divide jurisdicciones, sino también —y por sobre todo—, como un lugar desde el que se piensa y desde el que se escribe, en este caso, sobre la periferia..."
Realidades y potencialidades del turismo en Sudamérica. Hacia políticas regionales concertadas
Authors: Navarro-Drazich Diego
Published: July 2021

Esta investigación explora las potencialidades de Sudamérica en términos de turismo, particularmente desde la perspectiva de las Relaciones Internacionales. En primer lugar, se aborda la doble dinámica teórica que representa, por una parte, el turismo como locus de construcción de poder económico y político en el plano internacional y, por otra parte, una política regional concertada entre Estados sudamericanos orientada a promover el desarrollo turístico. Es decir, el turismo al servicio de las relaciones internacionales y éstas al servicio del turismo. La necesidad de construcción de poder con base en el desarrollo turístico se fundamenta en la pobreza e inequidad del subcontinente. Luego, se analiza la oferta y la demanda turística de América del Sur. Finalmente, se esbozan opciones de orden práctico para la gestión coordinada del turismo en Sudamérica.
Measuring Mental Model of Primary Teachers and Pre-service Teachers on Heat Transfer Concept
Authors: Hermita Neni , Wijaya Tommy Tanu , Putra Zetra Hainul , Yora Novi Yani , Suhandi Andi
Published: July 2021

This study compares primary teachers' mental models with pre-service primary school teachers' mental models on the heat transfer concept. The mental model categories reviewed in this study include scientific, synthetic, and initial. This study's method was descriptive quantitative method, with research subjects 40 primary teachers and 40 pre-service primary teachers. This study's instrument is a conceptual understanding test consisting of three parts of a statement that asks for an explanation and description. The results showed that in understanding concepts test in synthetic mental models, 32.5%. In the category of initial mental models, there is a comparison of 32.5%. While in the concept of convection, there is a comparison of 2.5% in the scientific category. For synthetic mental models' category is 5%. In the category of initial mental models is 7.5%. For the concept of radiation, there is no comparison in the category of scientific mental models. Next there is a comparison of 7.5% in the category of synthetic mental models. In the category of initial mental models is 7.5%. Generally, elementary school teachers and students are in synthetic mental models and the initial mental models' category.
The Effect of Literacy Skills on the Critical Thinking Skills of Mathematics Education Students
Authors: Susanti Vera Dewi , Krisdiana Ika
Published: July 2021

This study aims to see the effect of literacy skills on students' critical thinking skills. This research type is a correlational study to know the relationship between literacy skills and students' critical thinking skills. The total population is 168 students, and the level of precision is set at 10%. A sample of 63 respondents will be obtained, taken using a simple random sampling technique. The data analysis used in this study is a simple regression analysis with the product-moment correlation coefficient formula. The results showed that literacy skills positively correlate with students' critical thinking skills by 80%. It shows that besides literacy, there are still 20% of other factors that can affect students' critical thinking skills.
The Role of Education Politics as a Foundation in Developing Curriculum and Educational Techniques in Indonesia
Authors: Anwar Khairul , Novalina Sesti , Anwar Kasful , Hasibuan Lias , Suryani Dewi
Published: July 2021

This research aims to explore the political role of education in Indonesia and the problems encountered in its implementation and solutions to overcome. Close relationship Politics and education exist in a mutually related system in its implementation for improving the quality of education. Educators have always embraced politics because the educational process can provide value and contribute to political development. Having a high understanding of education politics is expected to contribute to controlling the direction of educational activities in Indonesia. The literature research method was used to obtain references related to the required data that is analyzed. It can be concluded that political viewpoint refers to the relationship between politics and government policies due to Indonesia's educational systems, strategies, and techniques. Various regulations, decrees, rules, administrative actions in education are part of the evidence of the political role of policies for education. Another view of politics is politics as a process, how the political performance takes place. This approach is more complex in concept and requires understanding how government processes work and how human behavior affects all these processes as a culture.
IDLE Challenges: Playing Digital Games?
Authors: Alhaq Muhammad Najmussaqib Diya , Drajati Nur Arifah , Wijayanto Agus
Published: July 2021

The purpose of this research is to examine the challenges faced by the learner and the activities they undertake concerning informal digital learning of English (IDLE) implementation in the English as foreign language (EFL) context. The impact of the COVID-19 on the education sector feels very challenging. Especially in EFL learning at the high/secondary school level, it is crucial since the skills are needed to support such level students' more complex need. It leads many experts to find the formal model's best alternative: playing digital games as IDLE. However, the current indications showed various challenges in the efforts of implementing IDLE within an academic context. As part of a more extensive sequential qualitative mixed-method study, seven high school students from various Indonesia parts were interviewed. From the findings, it is discovered that there were still some challenges regarding the implementation of IDLE in an academic context: physical and behavioural assumptions, dealing with the growth of physical and behavioural effect misconception and logical fallacy within the community; communal judgment, the a priori assumption of 'gaming stereotype' which massively wide-spread; and, technical challenges, regarding the implemental availability of the contemporary learning model. It is also recommended that finding solutions to these challenges requires many parties' involvement. It is due to some of the challenges were fundamentals. It is expected that many parties' involvement will make the resulting efforts to be a holistic solution.
The Efforts to Improve Thematic Learning Critical Thinking Skill through Problem Based Learning
Authors: Hutama Pindi Darma , Wardani Naniek Sulistya , Permana Intan
Published: July 2021

This study aims to find out whether the improvement of critical thinking skills in thematic learning can be attempted through Problem Based Learning. Moreover, it also wants to know how is the improvement of critical thinking skills student in thematic learning can be attempted through Problem Based Learning. The subjects of this research were class III students, even semester totaling 20 students. The type of this study was classroom action research (CAR). The model of CAR was spiral-shaped from Kemmis and Robin Mc. Tagget. The procedure of this study was implemented at least two cycles if cycle one was already improved. The observation was used in the data collecting. The study instrument used an observation sheet equipped with a performance appraisal rubric. The analysis data technique used was descriptive comparative technique. The result of the study stated that there was an improvement on critical thinking skills students in the thematic learning that PBL attempted had proven. The improvement of the number of skilled in good critical thinking was 15% in cycle 1, and 40% from the totaling students in cycle 2. The improvement of critical thinking skills in the students grade III in the thematic learning was attempted through PBL with steps of 1) reviewing problems by taking notes, 2) asking 3 energy source problems, 3) reasoning solving 3 problems of energy sources, 4) collecting data of energy sources, 5) analyzing data of energy sources, 6) writing report of the result of solving 3 problems of energy sources, 7) presenting the result of solving the problem of energy sources, 8) evaluating the process of energy sources problem-solving.
Online Reading Strategy in Academic Reading by Foreign Language Learners during Covid 19 Outbreak
Authors: Erni Erni
Published: July 2021

This mixed-method research used questionnaires, in-depth interviews, and open-ended questions as the instrument of data collection.  Twenty-five samples were selected randomly from 112 populations. The objectives of the study were to explore online reading strategies in academic reading by foreign language learners during the Covid 19 outbreak. This study revealed that: Using online reading strategies by foreign language learners were varied in four different types, namely global strategy, problem-solving strategy, support strategy, and soci0-effective strategy. Motivation influenced foreign language learners' online reading strategies for  13.65%  in academic reading during the Covid 19 outbreak; meanwhile, age and gender influenced less. Motivation influenced online reading strategies used by foreign language learners during the Covid 19 outbreak for two purposes: integrated and instrumental motivations. These two types of motivation influenced the choices and use of learners' online reading strategies during the Covid 19 outbreak.
Students' Perceptions on the Use of E-Portfolio for Learning Assessment
Authors: Muin Chalim Fathul , Hafidah Hafidah , Daraini Amira Muflicha
Published: July 2021

This study aims at probing students' perceptions of utilizing e-portfolio for learning at the university. The study was qualitatively conducted as a case study. The subjects were 16 undergraduate students of the seventh semester in a university.  The data were obtained by conducting interviews and disseminating a questionnaire.  The results of the study revealed that most participants demonstrated positive views towards the use of e-portfolio. Further, the participants acknowledged some crucial benefits of utilizing the e-portfolio. They were extended to; increasing the motivational beliefs and self-efficacy, learning new things, accomplishing the English tasks effectively, giving beneficial effects for the learning, and improving students' ability in English. The findings are expected to bring light to stakeholders to consider e-portfolio to encourage students' learning enthusiasm and engagement.
RIAS Learning Model: a Character Education Innovation
Authors: Muhlisin Ahmad , Sarwanti Sri , Jalunggono Gentur , Yusliwidaka Arnanda , Mazid Sukron , Nufus Achmad Busrotun
Published: July 2021

Character education has not been well facilitated in every learning process; hence, several indications of low character among college students are found. This research aims to develop a new learning model based on character education to enhance students’ spiritual and social attitudes. The research was a research and development by adopting Borg Gall’s research and development procedures. The research procedures consist of the following steps: 1) Library study, 2) designing a model design, 3) learning model development, 4) expert validation, and 5) focus group discussion with users and students. Instruments used in the research include content validity and construct validity sheets of the learning model with an assessment scale score of 1-5 that ranges from (1) not feasible, (2) less feasible, (3) fairly feasible, (4) feasible, and (5) very feasible. The research results indicate that 1) character-based learning innovation resulted in RIAS learning model with main steps of Reading, Identification, Analysis, and Self-reflection, 2) RIAS learning model has a validation score of 4.6 within a valid category; thus, it is feasible to be utilized to enhance social and spiritual attitudes. The suggested for further research is testing the effectiveness of the RIAS learning model on a wide scale and testing the effect of the RIAS learning model on problem-solving and student learning outcomes.
Teachers’ Perception towards Online Science Learning during the Pandemic
Authors: Sajidan Sajidan , Adi Fadhil Purnama , Atmojo Idam Ragil Widianto , Salimi Moh , Ardiansyah Roy , Anisa Adelia
Published: July 2021

This study aims to describe the perceptions of SD Angkasa Colomadu teachers on online science learning during the pandemic. This research used descriptive qualitative research methods and a case study approach. The subjects of this study were three teachers of grades IV, V, and VI SD Angkasa Colomadu in the academic year 2020/2021. Data collection techniques used interviews and documentation. The data validity test techniques used the triangulation technique. Data analysis techniques used interactive analysis techniques Miles and Huberman consisting of data reduction, data display, and conclusions. The results show that the teachers felt that learning sciences in the network was not optimal. Teachers do not optimally apply basic process skills. The teachers feel the limitation in the communication process.  They also have a restriction on directing the students to formulate hypotheses, conclude the material, guide experimental activities, attract students to ask questions, guide the measurement process, guide observation activities, classify, interpret, and predict processes due to media limitations. On the other hand, teachers feel that online learning makes teachers more innovative, creative, and able to take advantage of cellphones, computers, and the internet in learning activities, especially in learning science online during the pandemic period.
Academic Supervision in Improving Teacher Professionalism
Authors: Elliana Elliana , Yusrizal Yusrizal , Usman Nasir
Published: July 2021

This study aims to obtain empirical data about academic supervision in improving teacher professionalism at Lhokseumawe State Vocational High School. Academic supervision must be based on data, objective facts. Academic supervision is routine work that supervisors must carry out because of a dynamic curriculum that requires improvement in both documentation and contextually in the field. The method in this research uses a qualitative approach with descriptive analysis methods. The primary data sources of this study were obtained from direct interviews with informants consisting of school principals, teachers, and students, results from observations, and secondary sources obtained from various studies of documents, texts, and archives related to the implementation of Academic Supervision. The principal has carried out academic supervision in improving teacher professionalism, evidenced by the planning of supervision schedules, implementing, assessing the results of teacher performance using learning instruments prepared, and following up on the results of learning supervision. Supervision theory has been implemented well, one of which is directive supervision in learning and implementing initial meetings with teacher interviews carried out before implementing supervision.
Perceived Usefulness, Self-Efficacy, and Emotional Engagement: Does It Affect Student’s Satisfaction while using the Platform?
Authors: Masruroh Iffa , Surjanti Jun , Sholikhah Ni’matush
Published: July 2021

Many students are dissatisfied with using blended learning platforms. At the same time, student satisfaction with a blended learning platform can determine the quality of learning and learning outcomes. This study analyzed the direct and indirect influence between the user perception of a blended learning platform, self-efficacy, and emotional engagement on student satisfaction. This research includes quantitative research with a type of causality—grade XI students of IPS SMA 14 Negeri Surabaya as a population. A sample of 103 students was taken using saturated sample techniques. Data collection is obtained through interviews, questionnaires, and documentation. The data analysis used is path analysis. The results directly influenced perceptions of the usefulness of blended learning platforms, self-efficacy, and emotional engagement on student satisfaction. The indirect influence between the perception of usefulness of platform and self-efficacy to student satisfaction through emotional engagement.
Learning Assessment for Madrasah Teacher: Strengthening Islamic Psychosocial and Emotional Intelligence
Authors: Sukenti Desi , Tambak Syahraini , Siregar Ermalinda
Published: July 2021

This research focused on developing the learning assessment teacher of Madrasah Aliyah by strengthening Islamic psychosocial and emotional intelligence, using ex post facto research design and involving 297 Madrasah Aliyah teachers in 12 regencies/cities Riau Province, Indonesia. A questionnaire was made to measure Islamic psychosocial and emotional intelligence and measure learning assessment madrasah teachers. The data were analyzed using inferential statistics. The research results show that the gender levels of the madrasah aliyah teachers influence Islamic psychosocial but do not affect emotional intelligence and learning assessment. It confirms that male and female teachers do not have different emotional intelligence and teacher learning assessment, but Islamic psychosocial effects are affected. Madrasah teachers' teaching experience affects Islamic psychosocial, emotional intelligence, and learning assessment of madrasah aliyah teachers. This research shows that Islamic psychosocial contribution is "strong" in developing teacher learning assessments, while emotional intelligence has a "strong enough" effect. This research concludes that the learning assessment of madrasah teachers can be maximally developed by simultaneously mastering Islamic psychosocial and emotional intelligence in madrasah. This research has implications for the theory of "developing learning assessment for madrasah teachers" in developing the professionalism of madrasah teachers.
The Role of Madrasah Principal in Teacher Performance Supervision
Authors: Hakim Lukman
Published: July 2021

This study aims to obtain in-depth information related to the role of school principals in supervising teacher performance. Supervised performance is related to teaching and learning activities. The principal carries out supervision to improve the quality of teacher performance. This study used a qualitative approach with a survey method. Data were collected using observation, interviews, and documentation. Data analysis consists of the data reduction process, data presentation, conclusion drawing, and triangulation. The findings show that supervision activities by school principals have provided valuable input for teachers to improve the quality of education. The teacher has carried out teaching and learning activities that are adapted to current conditions. However, the identified shortcomings are in the mastery of digital technology devices as a tool that can support educational activities.