bluuebunny/crossref_metadata_2025 huggingface dataset:
Kinematical Constraint on Eccentricity in the Protoplanetary Disk MWC 758 with ALMA
Authors: Kuo I-Hsuan Genevieve , Yen Hsi-Wei , Gu Pin-Gao , Chang Tze-En
Published: October 2022

We analyzed the archival data of the 13CO and C18O J = 3 − 2 emission lines in the protoplanetary disk around MWC 758 obtained with the Atacama Large Millimeter/submillimeter Array to discuss possible planet–disk interaction and non-Keplerian motion in the disk. We performed fitting of a Keplerian disk model to the observational data and measured the velocity deviations from the Keplerian rotation. We found significant velocity deviations around the inner cavity in the MWC 758 disk. We examined several possibilities that may cause the velocity deviations, such as pressure gradient, height of the emitting layer, infall motion, inner warp, and eccentricity in the disk. We found that the combination of an eccentric orbital motion with eccentricity of 0.1 ± 0.04 at the radius of the inner cavity and an infalling flow best explains the observed velocity deviations. Our kinematically constrained eccentricity of the gas orbital motion close to the inner cavity is consistent with the eccentricity of the dust ring around the inner cavity measured in the submillimeter continuum emission. Our results hint at strong dust–gas coupling around the inner cavity and presence of a gas giant planet inside the inner cavity in the MWC 758 disk.
Metacognitive knowledge and experiences developed by chemistry teachers through the process of research-based teaching: an emphasis on continuing education
Authors: Francisco Welington , Silva Erivanildo Lopes , Wartha Edson José
Published: October 2022

There is a noticeable, widely accepted movement in the field of science teaching, which suggests that continuing education should focus on the needs and goals of the teachers. To this end, a viable path is adopting a metacognitive perspective to enable deeper reflections, the construction of meaning, reevaluations and redirections. Given this panorama, this paper aims to present a discussion about the metacognitive knowledge teachers may hold on the subject of research-based teaching, and what metacognitive experiences they may bring up in order to further develop (more) investigative activities in class. Assuming this thesis and relying on action research mechanisms, a training course for practicing teachers was held between August and December 2019, supported with the participation of six Chemistry teachers working in public and full-time schools in the state of Sergipe, Brazil. Based on the audio recording of the first phase of the course, our results point out that these teachers have adequate metacognitive knowledge on research-based teaching, and how to foster more autonomy for students to elaborate their own arguments, propose solutions, make decisions and solve different problems. The discussions conducted throughout the course allowed an expansion of this knowledge, by means of proposals grounded on various types of metacognitive experiences. Therefore, it is understood that taking a metacognitive approach for continuing education, as well as for initial training, leads to certain possibilities: firstly, the chance to properly identify the well-established metacognitive knowledge held by teacher; and then, to reflect on it, with a view to planning new metacognitive experiences that will be built upon this knowledge, expanding and improving it.
JEEDMA: a utilização de um jogo eletrônico educacional gamificado para o desenvolvimento da cognição numérica
Authors: Silva Juliano Alessio da , Blanco Marilia Bazan , Coelho Neto Joao
Published: October 2022

Os jogos eletrônicos educacionais podem ser utilizados nas mais diversas formas de ensino, tanto em um contexto tradicional quanto com alunos com necessidades especiais, visto seu potencial para auxiliar no desenvolvimento da Cognição Numérica. Este trabalho tem como objetivo geral apresentar um jogo eletrônico educacional gamificado, denominado de Jogo Eletrônico Educacional em Matemática – JEEDMA, para auxiliar o desenvolvimento da Cognição Numérica. O encaminhamento metodológico utilizado foi o qualitativo para analisar a aplicação do jogo em crianças dos anos iniciais, a fim de analisar o desenvolvimento da Cognição Numérica. Diante das análises, se torna possível identificar que o JEEDMA contribuiu para o desenvolvimento da Cognição Numérica dos indivíduos dos anos iniciais, uma vez que o tempo gasto para conclusão das tarefas e a quantidade de erros para completá-las diminuíram ao longo do tempo de sua aplicação.
Observação de aves como estratégia didática na educação ambiental em uma escola do campo
Authors: Morais Rosiane De , Guedes Neiva Maria Robaldo , Andrade Luciana Paes de , Favero Silvio
Published: October 2022

O objetivo do estudo foi verificar se a atividade observação de aves é viável na reserva da Escola Municipal Agrícola Governador Arnaldo Estevão de Figueiredo em Campo Grande, Mato Grosso do Sul, e como esta pode ser explorada como estratégia didática em atividades de Educação Ambiental. A abordagem metodológica utilizada foi de caráter descritiva-exploratória, enquadrado no paradigma qualitativo. As atividades envolveram a participação de 25 alunos matriculados no 7º ano do ensino fundamental, no ano de 2018. As observações foram conduzidas pelas trilhas presentes dentro da Reversa da escola (remanescentes do bioma Cerrado). O caminho metodológico percorrido para o desenvolvimento das atividades foi dividido em cinco momentos: primeiro momento apresentação da atividade, segundo momento a observação das aves, terceiro momento organização dos dados produzidos, quarto momento contextualização dos conteúdos abordados em sala e o último a construção de uma placa informativa com algumas aves presente na reserva. Durante os três dias de observação registrou-se a presença de 71 espécies de aves. A observação de aves é uma estratégia didática que possibilitou o estudo do meio a partir de uma atividade integradora, que permitiu a discussão e contextualização de diferentes conteúdos e temáticas ambientais, e o envolvimento de diferentes componentes curriculares. A observação de aves contribui na construção do conhecimento e no desenvolvimento da capacidade de atuação do aluno no mundo vivido. Observação das aves não se traduz somente na forma científica, mas sim em uma forma de lazer e aprendizagem lúdica, fortalecendo a ligação existente entre o professor e o aluno. Houve a aproximação das aulas teóricas associadas as aulas práticas/de campo, estimulando a postura reflexiva, investigativa, e a autonomia para tomada de decisões, sendo alguns dos valores por eles desenvolvidos enquanto processos para a formação cidadã.
Avaliação e modificação de microscópio alternativo para estruturação de laboratório de microbiologia e realização de atividades práticas na educação básica
Authors: Sato Amélia , De Lima Nicolle , Ono Lucy
Published: October 2022

Este estudo teve por objetivo modificar o microscópio alternativo de Yoshino (2017), que é composto por um aparador de acrílico que comporta uma lente plano-convexa e é associado a um smartphone, para permitir a visualização de microrganismos como leveduras e fungos filamentosos, bem como propor atividades práticas inéditas com esse equipamento, para que professores de Ciências e Biologia de Ensino Fundamental e Médio possam realizar atividades práticas de estudo de microrganismos em laboratório escolar. A principal modificação proposta consistiu na retirada de algumas das porcas metálicas do equipamento original para permitir maior aproximação do suporte de lâminas à lente de leitor de DVD, permitindo o ajuste de foco para lâminas contendo leveduras ou fungos filamentosos. O grau de magnificação alcançado foi determinado com lâmina de calibração para microscópio óptico, obtendo-se um aumento de 23 x (vezes) sem o uso de zoom digital da câmera do smartphone e de até 175 x na imagem final (capturada com zoom digital de 4 x da câmera somado ao aumento adicional observado na tela do computador quando a resolução da imagem era de 72 dpi). O microscópio modificado de Yoshino (2017) permitiu a observação da micromorfologia do fungo filamentoso Botrytis cinerea (mofo cinzento do morango), compatível com o observado em microscópio óptico convencional, bem como a observação da morfologia de leveduras Saccharomyces cerevisiae em suspensão aquosa de fermento biológico seco. Avaliou-se também o uso do microscópio modificado para correlacionar o efeito da concentração de açúcar do meio no aumento do diâmetro médio das bolhas de gás produzidas no processo de fermentação realizado pelo S. cerevisiae, ao longo de 3 minutos de gravação com câmera de smartphone de lâminas posicionadas no equipamento confeccionado. Conclui-se que o microscópio de Yoshino modificado constitui um modelo de microscópio alternativo que professores da Educação Básica poderiam utilizar para atividades práticas investigativas com microrganismos.
Explorer des lisières d'activités
Authors: Sidoroff Nicolas
Published: October 2022

Cette recherche s’inscrit dans la thématique générale d’une microsociologie des pratiques musicales, depuis ma position de musicien impliqué dans de nombreuses et diverses pratiques. Comment des personnes font de la musique ensemble ? Comment les différentes activités constituant une pratique musicale (la musique se faisant) se partagent et se répartissent ? Quelles sont les divisions du travail, les distinctions d’activités à l’œuvre ? Et quelles sont les dominations et/ou les émancipations repérables en portant attention à de telles distinctions ? Je me propose de regarder les pratiques musicales comme une articulation de six « noyaux à lisières » : création, performance, médiation-formation, recherche, administration, technique-lutherie. Les successions et appariements d’activités sont déjà bien traité·es, mais que se passe-t-il dans des lisières entre ces noyaux ? Sans doute se cachent ici, des sources d’hybridation et de créolisation, un regard intéressant sur des formes de coopération, des créations institutionnelles de résistances et d’alternatives. De quelles manières des activités de lisières s’exercent-elles ? Que racontent-elles sur la société ? Je commencerai autour des noyaux « médiation-formation » (en sciences de l’éducation) et « recherche » (dans l’université), c’est-à-dire en considérant plus globalement les savoirs, les rapports au savoir et les apprentissages qui se jouent dans de telles lisières. Plongé dans trois types de terrain (les mondes de la musique où je suis impliqué, ceux où je ne le suis pas, des mondes éloignés de la musique), la thèse consistera alors à « explorer des lisières d’activités, vers une microsociologie des pratiques (musicales) ».
L’université de Gripsvalde (Greifswald) au XVII e siècle
Authors: Alvermann Dirk , Richard Nicolas
Published: October 2022

L’acquisition par la Suède de la Poméranie occidentale apportait à la Couronne une nouvelle université. Fondée en 1456, l’université de Greifswald avait su faire face au défi de la Réformation au xvie siècle, mais la guerre de Trente Ans fit empirer la situation (économique) de l’institution dans des proportions dramatiques. La situation financière difficile fit aussi échouer les projets de réformes que la reine Christine de Suède avait pour Greifswald. L’université, qui jouait un rôle important dans l’administration du souverain, attirait aussi des Suédois jusqu’à la fin des années 1660, avant d’être détrônée par l’université de Lund, fondée en 1666.
Guerre en Ukraine : y a-t-il génocide ?
Authors: Vinet Guy
Published: October 2022

La question du génocide est souvent abordée par un biais émotionnel et donc instrumentalisée à des fins politiques. Or, il faut avoir une approche juridique en cherchant à définir l’intentionnalité. Cela permettrait d’éviter des imprécations et des effets de propagande, oubliant la matérialité des faits et faisant fi des victimes.
Les espaces de discussion dans une administration libérée : entre nouvelles prescriptions et invisibilisation du travail
Authors: de Ridder Marine
Published: October 2022

Alors que les idéologies managériales basées sur l’autonomie et la responsabilisation des travailleurs intéressent les praticiens et interrogent les chercheurs en gestion, cet article porte sur les espaces de discussion du travail des entreprises libérées. La libération des organisations est abordée comme une philosophie gestionnaire visant à supprimer les pratiques managériales fondées sur le contrôle et le commandement au profit d’une plus grande liberté pour les travailleurs. Si la libération consiste à décentraliser les prises de décision et à encourager l’autogestion des équipes, nous supposons qu’elle s’accompagne d’un renouvellement des modalités de dialogue sur le travail, que nous explorons en mobilisant le modèle de management des espaces de discussion du travail. A l’aide d’une étude de cas dans une administration publique, nous caractérisons d’abord l’ensemble des espaces de discussion du travail identifiés pour, ensuite, mettre en évidence leurs pratiques et leurs objets. Cela nous amène à identifier une transformation des prescriptions à l’œuvre ainsi que les effets de ces nouvelles pratiques de dialogue, notamment, une invisibilisation du travail réel dans certains espaces de discussion du travail. Nous discutons alors des possibilités et des limites qu’offre l’entreprise libérée en termes de management par le dialogue.
Concepts, habitudes et le pragmatisme mal entendu
Authors: Santarelli Matteo
Published: October 2022

La critique de la philosophie de William James qu’Émile Durkheim développe dans Pragmatisme et sociologie est examinée selon deux aspects : 1) le désaccord entre James et Durkheim sur le problème des concepts et de la conceptualisation ; 2) l’échec presque total de Durkheim à considérer le thème le plus proprement sociologique du travail de James : sa théorie de l’ habit (ou habitude). Dans les deux cas, référence est faite au rôle joué (et parfois non joué) dans la critique de Durkheim par les Principles of Psychology . Malgré l’influence du contexte historique et les malentendus qui en découlent, la réception du pragmatisme par Durkheim touche ainsi parfois des nerfs sensibles de la philosophie et de la psychologie de James.
Courant de conscience et philosophie de la culture
Authors: Viola Tullio
Published: October 2022

Dans le cadre général de la réception des  Principles of Psychology  dans les pays germanophones, on examine l’influence de cet ouvrage sur la philosophie de la culture d’Ernst Cassirer. Le concept de flux de conscience a notamment aidé Cassirer à résoudre ce que l’on peut appeler le problème de l’articulation : comment décrire la transition entre le flux continu de sensations et la création de formes culturelles capables de durer dans le temps ? Pour répondre à cette question il faut faire face à un problème auquel James n’avait pas donné de réponse définitive, celui de la relation entre les composantes dynamiques ou transitoires du flux de la conscience et ses composantes statiques : concepts, symboles, images.
Lettre de William James à Joseph Segond
Authors: James Wm
Published: October 2022

William James répond le 19 mars 1902 à la proposition que lui a faite Joseph Segond de traduire les Principles of Psychology . Il l’invite à se mettre en relation avec d’autres candidats à cette traduction et suggère de traduire plutôt le Briefer Course dont il prépare une nouvelle édition.
Proteolysis during aging of commercial full-fat and reduced-fat Cheddar cheeses of identical chronological age
Authors: Rosenberg Moshe , Rosenberg Yael
Published: October 2022

The evolution of Cheddar cheese flavor and texture is highly dependent on its proteolytic state however, Cheddar cheese is marketed based on its chronological age. Information about the proteolytic age of commercial Cheddar cheese of a given age almost does not exist. The present research challenged the merit of marketing Cheddar cheese according to its chronological age. Full-fat (FF) and Reduced-fat (RF) Cheddar cheeses, of identical chronological age, were aged for 180 days at 5 ℃ and the progression of the proteolytic cascade was investigated and quantified. The accumulation of the cheese N fractions that are soluble at pH 4.6 (4.6SN), soluble in 12% tri-chloroacetic acid (12TCASN), and soluble in 5% phospho-tungstic acid (5PTASN) was quantified along with the accumulation of free L-Glutamic acid (L-Glu). Results indicated that both FF and RF cheeses exhibited very significant among-cheeses differences in accumulation of the investigated fractions (p < 0.05). These significant differences were related to both the concentration of the fractions and the rate at which they accumulated. The results thus reflected significant among-cheeses differences in the inherent proteolytic potential of the cheeses as well as in its manifestation during aging. Results clearly indicated that the chronological age of the investigated cheeses did not reflect their proteolytic age. The results highlighted the need to market Cheddar cheese based on some proteolysis-related quantitative parameters.
A novel scheme of $ k $-step iterations in digital metric spaces
Authors: Botmart Thongchai , Shaheen Aasma , Batool Afshan , Etemad Sina , Rezapour Shahram
Published: October 2022

In computational mathematics, the comparison of convergence rate in different iterative methods is an important concept from theoretical point of view. The importance of this comparison is relevant for researchers who want to discover which one of these iterations converges to the fixed point more rapidly. In this article, we study the different numerical methods to calculate fixed point in digital metric spaces, introduce a new k-step iterative process and conduct an analysis on the strong convergence, stability and data dependence of the mentioned scheme. Some illustrative examples are given to show that this iteration process converges faster.
Ulysse ou la piraterie en traduction
Authors: Larsonneur Claire
Published: October 2022

Ulysse par jour est une entreprise inédite de traduction française du roman de Joyce, Ulysse, publiée par Guillaume Vissac au rythme d’un tweet par jour depuis 2012. Ces tweets sont relayés et archivés dans un espace Web dédié. En choisissant de créer un dispositif numérique spécifique à cette traduction, Guillaume Vissac sort la traduction de l’espace éditorial où elle était confinée et de sa position ancillaire. L’architexte ainsi construit joue sur la polyvalence des médias numériques (cartographie, tags horaires, tags thématiques, hyperliens) et ouvre une pluralité de lectures. Le séquençage du roman-fleuve en 140 puis 280 caractères produit des micro-textes, qu’on pourrait qualifier de fragments mais qui s’en distinguent par leur unité propre (textuelle et écranique) et par leur insertion dans un réseau de références. Le dispositif influe sur l’écriture dans la mesure où il conduit à une poétisation du roman et à un redéploiement de l’œuvre dans une série de plis (versions, gloses) littéraires. Autre différence avec une publication traditionnelle, le dispositif articule des temporalités complexes, tant en matière d’écriture que de lecture. Plutôt que de parler de traduction proprement dite, Vissac préfère le terme de « piratage poétique », qu’il emprunte à Kathy Acker : la traduction est une réappropriation poétique mais aussi une transgression, une remédiation créatrice. Il s’inscrit ainsi dans un ensemble de pratiques artistiques ; littéraires comme chez Acker, Riós ou Headley, ou multimodales comme chez J. R. Carpenter, entre détournement et remix, qui remettent en question les frontières des genres traditionnels.
Sur la route avec Google
Authors: Tréhondart Nolwenn
Published: October 2022

En mars 2017, l’artiste et développeur Ross Goodwin se lance dans un road trip entre New York et La Nouvelle-Orléans le conduisant sur les traces de Jack Kerouac. Il monte à bord d’une Cadillac équipée d’une caméra de surveillance, d’un GPS, d’un microphone, d’une horloge, le tout connecté à un réseau de neurones artificiels AI Wordcar, qu’il a lui-même nourri et éduqué durant plusieurs années des plus grands récits de voyage de la littérature anglo-saxonne. Imprégné du vocabulaire et du rythme des textes, AI Wordcar écrit et décrit ses perceptions numériques dans un long poème en prose, hybridant le programme de la machine avec des données collectées sur la route. Cette « performance littéraire automatisée » a attiré l’attention de la maison d’édition Jean Boîte ; en 2018 paraît 1 The Road, sous l’accroche suivante : « Le premier livre écrit par une intelligence artificielle est un road trip gonzo ». Dans cet article, nous proposons d’analyser 1 The Road comme une production culturelle se situant au croisement de la performance artistique et littéraire, de l’imaginaire du livre, des pratiques éditoriales contemporaines, et des mutations du capitalisme numérique liées à l’intelligence artificielle. Dans un premier temps, nous nous intéressons aux spécificités du processus de création textuelle mis en œuvre durant la performance, et aux questions que la démarche peut susciter en termes de posture auctoriale. Puis nous interrogeons les enjeux de remédiation éditoriale et de « mise en livre » : comment un texte écrit par une intelligence artificielle est-il transformé en « produit culturel, collant aux usages et aux attentes des consommateurs » ? En dernier lieu, nous nous penchons sur les enjeux idéologiques et politiques d’une entreprise artistique et éditoriale dont l’existence semble aussi servir les intérêts de la firme Google. À l’heure où les procédés liés à l’intelligence artificielle sont majoritairement issus de grandes firmes néolibérales, le destin de la littérature numérique semble en effet inévitablement lié à des formes de domination culturelles et capitalistiques impulsées par les GAFAM.
"Minas Gerais é muitas"
Authors: Fonseca Marcus Vinícius , Souza Batista Vanessa
Published: October 2022

Neste artigo elaboramos um perfil do público das escolas de instrução elementar da região tradicionalmente conhecida como Sul de Minas. Utilizamos como material de análise uma documentação censitária relativa à província de Minas Gerais, dos anos de 1830. Esse material permitiu estabelecer características como o perfil racial e socioeconômico dos alunos e aspectos relativos a seus grupos familiares. Elaboramos também uma comparação do público das escolas da região sul com o da região central de Minas. Isso tornou evidente a singularidade da população que acessava as escolas da região e a importância de se levar em consideração a diversidade regional nas análises sobre a história da educação em Minas Gerais, no século XIX.
Retratos e registros de escolas de São João de Meriti (RJ)
Authors: Bezerra Amália Cristina Dias da Rocha
Published: October 2022

Confrontamos retratos de escolas públicas primárias de São João de Meriti com o debate historiográfico sobre ingresso e atuação de populações não-brancas na educação pública, na condição de estudantes e docentes. A pesquisa nos mapas de frequência escolar no Arquivo Público do Estado e a busca pelo nome de docentes na hemeroteca da Biblioteca Nacional descortinaram modos de funcionamento das escolas fotografadas, desde a oferta dos níveis de ensino, matrículas e trajetórias docentes. A historiografia da Baixada Fluminense informa sobre o perfil racial e populacional. A partir do território como posição de análise, apresentamos, entre condições de acesso e permanência, os contornos e margens das experiências educativas de populações não-brancas periféricas entre 1920 e 1943.
As alunas negras da Escola Doméstica de Nossa Senhora do Amparo (1889-1910)
Authors: Chiozzini Daniel Ferraz , Leal Luciana Silva
Published: October 2022

O presente texto é parte de uma investigação acerca do processo de escolarização de meninas pretas e pardas na Escola Doméstica Nossa Senhora do Amparo, em Petrópolis, entre os anos de 1889 e 1910, instituição que tinha como objetivo amparar e instruir meninas órfãs. Foram investigadas onze alunas identificadas como pretas ou pardas na documentação da escola, constituída por livro de matrícula, registros paroquiais e os boletins de notas. Buscou-se investigar se havia alguma diferenciação nas práticas educativas oferecidas a elas e a trajetória percorrida do ingresso até a saída da escola. Para compreender o sentido da categoria cor, a pesquisa dialogou com Mattos (2013) e Muller (2008a, 2008b)
Do sertão ao sul baiano
Authors: Santos Cristiane Batista da
Published: October 2022

Resumo: Este trabalho tem como finalidade apresentar aspectos da trajetória do intelectual Deoclecio Ramiro Alves da Silva (1889-1927). O recorte temporal inicia-se em 1880, na capital baiana, e estende-se  à 1927, em Ilhéus. Tomou-se como ponto de partida do estudo, a notícia do ingresso deste na Escola Normal de Homens, localizada em Salvador. Nomeado como professor, em 1913, para atuar na região cacaueira, também foi redator em Ilhéus na Primeira República. Este texto, teoricamente, encontra-se no entrecruzamento entre a História da Educação e a História Social que inclui as trajetórias de intelectuais negros, incumbindo-se, portanto, de visibilizar o protagonismo deste intelectual. Para tal, utiliza-se da análise de  fotografias e jornais editados na Bahia. Recorremos ao entendimento de intelectuais como postula Sirinelli (2003), Silva (2019), Barros (2021) e do trato com as fontes históricas propostas por Ginzburg (1989; 2007) com o Método Indiciário da ligação nominativa de fontes na análise qualitativa dos dados a partir de indícios. A hipótese central é de que a História da Educação em Ilhéus pode ser perscrutada a partir da trajetória de docentes negros que são invisibilizados no tocante às suas contribuições. Entre os resultados, destaca-se que Deoclecio fez parte de uma rede de sociabilidade de intelectuais na primeira República, na capital e em Ilhéus, representando um grupo que coexistiu ao lado dos coroneis, ícones da elite econômica e política e, em paralelo, constituindo-se como uma elite cultural que exercia a docência como uma agência potencializadora de suas ideologias políticas.
A ordem do presidente JK
Authors: Lima Fábio Souza
Published: October 2022

O presente artigo tem por objetivo resgatar a história da criação da Escola Normal Julia Kubitschek, em 1960, ano em que a capital do Brasil foi transferida do Rio de Janeiro para Brasília. Especificamente, objetivou-se também abordar as políticas públicas para formação de professores primários, as tramas político-partidárias, a cobertura da imprensa carioca e a atuação de comissões de pais de alunas durante o processo de criação da unidade. O estudo teve por base os pressupostos da nova história política e a metodologia de análise de periódicos. Concluiu-se que não houve planejamento para a expansão do Curso Normal na antiga capital, sendo as barganhas políticas, a interferência presidencial e os interesses da imprensa e das famílias cariocas as peças centrais que deram origem à instituição.
Comienzo de la atención educativa a la primera infancia en España
Authors: Vázquez Domínguez Carmen
Published: October 2022

El objeto de estudio de este trabajo son las primeras escuelas de párvulos en la ciudad de Cádiz, su momento de implantación, el número de centros que se abrieron, condiciones de los inmuebles que las acogen y circunstancias en las que desarrolló su labor el profesorado que las atendía. En este sentido se ha intentado desentrañar los hechos históricos desde una perspectiva social que explique no solamente la creación de estas escuelas, sino que lo encuadre en el contexto que las motivó. El método utilizado ha sido el historiográfico, entendido como procedimiento científico en las ciencias sociales por el que se interpreta el pasado más allá de la subjetividad del investigador, el habitualmente utilizado en la investigación histórico-educativa.
Uma tipologia das letras usadas na fase inicial da escolarização no Rio Grande do Sul
Authors: Silveira Alessandra Amaral da
Published: October 2022

Este artigo apresenta um mapeamento das letras usadas nas classes iniciais de escolarização de diferentes escolas gaúchas no período de 1937-2015, periodização possível considerando a documentação (cadernos de alunos) disponível no acervo de um centro de memória brasileiro. A metodologia utilizada foi a operação historiográfica enquanto uma produção do pesquisador que associa um lugar (social) com diferentes procedimentos de análises (práticas) e com a construção de uma escrita. A análise possibilitou problematizar as mudanças de perspectivas que alteram as orientações e prescrições para o ensino dos tipos de letras. A partir dos dados, foi possível identificar cadernos dos alunos com o uso exclusivo de um tipo de letra e cadernos com o uso concomitante das letras, e essas variações estavam vinculadas aos debates da época.
Entre a Escola Nova e a Escola Básica
Authors: Oliveira Fernando Rodrigues de
Published: October 2022

Com o objetivo de problematizar como as prescrições para o ensino da língua portuguesa estiveram associadas a projetos de formação do povo e a ideais de Educação, focalizam-se neste artigo os programas publicados entre 1949 e 1968 em São Paulo, decorrentes de duas reformas curriculares do ensino primário. Fundamentada nas contribuições da História do Currículo, a análise desses programas indica que a modernização curricular para o ensino do português implementada em São Paulo no período estudado foi marcada pela permanência do princípio filosófico e conceitual de entendimento da língua, porém correspondeu à importante ruptura com relação à cultura escolar moldada pelo ideal republicano, marcando o intento da escola básica fundada na razão técnico-instrumental.
Preparation of Bamboo Long Fibers and their Reinforced Polypropylene Composites
Authors: Han Yu Tong , Li Da Gang , Shi Kang Jie , Ma Dan , Tang Yu , Ma Chao Qun
Published: October 2022

In the context of carbon neutrality, it is of good economic and ecological value to replace synthetic fibres with natural fibres as reinforcing materials in the preparation of composites. The effect of the hot pressing process parameters on the physical and mechanical properties of the LBF/PP composites was further investigated. The distribution of LBF in the composites was observed by CT. The experimental results show that the hemicellulose content of the BF decreases and the lignin content decreases after the alkali treatment. The mechanical properties of the LBF/PP composites were better at a hot pressing temperature of 180°C, a hot pressing pressure of 8 MPa, a hot pressing time of 15 min and a mass fraction of 70% LBF, with bending strength and bending modulus reaching 226.1 MPa and 15.1 GPa respectively. CT results show that the fibres are evenly distributed in the composites and that the hot pressing process allows the molten PP to penetrate the pores of the LBF surface, forming a good physical and mechanical bond. These composites can be used in various applications such as construction, automotive, consumer goods etc. They are considered to be a suitable alternative to solid plastic products and materials.
Structural Characterization of V2O5/TiO2 Nanocomposites Prepared by Co-Precipitation Method
Authors: Rani Pinki , Rohilla Sunil , Verma Ajay Singh
Published: October 2022

Powder nanoparticles of vanadium oxide doped with titanium dioxide were successfully prepared by the chemical co-precipitation method. The sample was calcined at temperatures 150, 300, 450, and 600°C. As prepared and heat-treated samples were structurally characterized through X-ray diffraction. The crystal size, cell parameters, R-Factor, and structural properties of mixed nano oxide were investigated. The value of the goodness fit factor, R-Factor, and cell parameters were examined by Rietveld Refinement. XRD study reveals that V2O5 exhibits orthorhombic structure and this orthorhombic phase is fully developed at 600°C. By using XRD data crystallite size of V2O5 was estimated to be 33.98nm and the crystallite size of TiO2 was estimated to be 35.04nm.
Numerical Deflection Analysis of Rectangular Laminated Composite Plates - Truck Bed - Case Study
Authors: Veerappan Balasubramani , Vasudevan Sudharshan , Karthikeyan B.
Published: October 2022

Transport industry plays a vital role in development of economy of countries. To increase the load carrying capacity of the truck, the weight of truck bed may be reduced using fibre reinforced composite material. In this work, a numerical investigation is performed to reduce the weight of the truck bed using different types of laminated composites. An extensive study is conducted using unidirectional and woven fibres of glass, carbon and Kevlar fibres with polyester, epoxy and vinyl ester resins. Carbon fibre laminated plates have higher stiffness than Glass and Kevlar composite plates. Asymmetrically hybrid composite plates have lower stiffness than symmetrically hybrid composite plates. It is observed that the stiffness of plate is increased when kevlar unidirectional fibres are arranged at top and bottom of the laminate. [K/Gw]S hybrid composite plates has the lowest deflection than other five hybrid composite plates. An optimization study is performed to identify the influencing parameter for deflection of the composite materials among material type, fibre volumetric fraction and the thickness of plate using Taguchi method. The results revealed that thickness of the plate has more influential than other two parameters.
Study of Air Entrained Concrete with Various Types of Air Entraining Admixtures
Authors: Pikna Ondřej , Ťažký Martin , Hela Rudolf
Published: October 2022

In current concrete practice, several types of air entraining admixtures are used. These admixtures aim to improve the durability of concrete in aggressive exposure conditions caused by negative temperatures in combination with salts. The current article attempts to describe the types actually used, namely, synthetic tensides and natural resins and to also compare their effect on the durability of physical and mechanical parameters. With these admixtures, air entrained concrete with different amounts of air content in the concrete are designed. Furthermore, the article describes methods for determining the parameters of air entrained concrete, as well as their advantages, disadvantages and their evaluation.
Bottom-up influence of Subjective Success (Happiness) on Sri Lankan Grassroots level Inventors
Authors: Wickramasinghe C. N. , Ahmad Nobaya
Published: October 2022

Owing to the poorer explicit successful performances, the grassroots level inventors in developing countries were not given needed attention and acceptable level recognition. Therefore, the question of why these inventors continuously involved in inventive activities where surroundings are becoming hostile to independent inventing remained unanswered in the literature. The present study aims to fill the said knowledge gap by exploring the demographic, psychological, technical and social causes and consequences of objective and subjective success of grassroots level inventors in Sri Lanka. The study was designed as a correlational research. Out of 640 patent applied grassroots level inventors in Sri Lanka between the year 2000 and 2008, 200 were randomly selected as the sample of the study. The sample represented 31% of the target population, and it has provided the acceptable statistical power 0.80 at 0.05 confidence level. According to the bottom-up path model, income, engagement in inventive activities and external linkages have positive influence on the objective success of grassroots level inventors. On the other hand, grassroots level inventors’ marital status, internet usage, life orientation and social capital have significant positive influence on the subjective success of inventors. More importantly, selected inventive life inputs: income, engagement in inventive activities and external linkages as well as the outcomes: objective success, inventive career satisfaction and community connectedness have significant indirect and direct positive influences on subjective success respectively.
Does Gender Diversity Influence the Operational Sustainability of Microfinance Institutions (MFIS) In Sri Lanka
Authors: Thrikawala Sujani
Published: October 2022

This study examines the relationship between gender diversity and operational sustainability of Sri Lankan Microfinance Institutions (MFIs). The static OLS regression and random effect models are used to analyse an unbalanced panel data comprising 243 firm-year observations over the period 2007 to 2012. Findings show that the institutions with female directors on the board have a negative effect on operational sustainability. This study also discovered that MFIs with female CEOs and female chairpersons have a positive effect on operational sustainability. This research provides insight to the policy-makers regarding gender diversity on boards in Sri Lankan MFIs.
COVID-19: Past, present and future
Authors: Bergquist Robert
Published: October 2022

Not available
Adaptive radiation therapy (ART) for patients with limited-stage small cell lung cancer (LS-SCLC): A dosimetric evaluation
Authors: Sager Omer , Dincoglan Ferrat , Demiral Selcuk , Uysal Bora , Gamsiz Hakan , Ozcan Fatih , Colak Onurhan , Elcim Yelda , Gundem Esin , Dirican Bahar , Beyzadeoglu Murat
Published: October 2022

Background:

Adaptive radiation therapy (ART) refers to redesigning of radiation therapy (RT) treatment plans with respect to dynamic changes in tumor size and location throughout the treatment course. In this study, we performed a comparative volumetric and dosimetric analysis to investigate the impact of ART for patients with limited-stage small cell lung cancer (LS-SCLC).

Methods:

Twenty-four patients with LS-SCLC receiving ART and concomitant chemotherapy were included in the study. ART was performed by replanning of patients based on a mid-treatment computed tomography (CT)-simulation which was routinely scheduled for all patients 20–25 days after the initial CT-simulation. While the first 15 RT fractions were planned using the initial CT-simulation images, the latter 15 RT fractions were planned using the mid-treatment CT-simulation images acquired 20–25 days after the initial CT-simulation. In order to document the impact of ART, target and critical organ dose-volume parameters acquired from this adaptive radiation treatment planning (RTP) were compared with the RTP based solely on the initial CT-simulation to deliver the whole RT dose of 60 Gy.

Results:

Statistically significant reduction was detected in gross tumor volume (GTV) and planning target volume (PTV) during the conventionally fractionated RT course along with statistically significant reduction in critical organ doses with incorporation of ART.

Conclusion:

One-third of the patients in our study who were otherwise ineligible for curative intent RT due to violation of critical organ dose constraints could be treated with full dose irradiation by use of ART. Our results suggest significant benefit of ART for patients with LS-SCLC.
Histopathological and immunohistochemical clues to the illusive diagnosis of follicular dendritic cell sarcoma
Authors: Sood Ridhi , Mehta Anurag
Published: October 2022

Follicular dendritic cell sarcoma is a rare histiocytic and dendritic neoplasm mainly involving the lymph nodes and selective extranodal sites. They are often misdiagnosed due to nonspecific clinical, radiological, and morphological findings in addition to their rarity. Four cases described below had variable age of presentation, site of involvement, size of the lesion, and histopathological features. Application of an extensive immunohistochemical panel, including a combination of >1 dendritic cell marker, clinched the diagnosis. A combination of D2-40 and Cluster of differentiation 21 (CD21) worked best in establishing a definite role in the current series. Programmed death-ligand 1 (PD-L1) analysis was positive in two of the three cases where it could be performed. However, none of our cases had received immunotherapy. Prompt recognition of the described histopathology features and incorporation of novel immunohistochemical markers can translate to timely initiation of therapy for this aggressive disease.
The Effect of Adding Nanoparticles to Dental Porcelain on the Fracture Resistance and Bond Strength to Zirconia Core
Authors: Mohammed Abdullah J. , Dawood Alaa E. , Saeed Mohammad A.
Published: October 2022

Background:

Porcelain combined with zirconia core substructure has low fracture toughness. Nanoparticles are incorporated into the porcelain to boost its mechanical properties.

Aims:

To evaluate the effect of the incorporation of silver oxide and titanium oxide nanoparticles into porcelain powder on the bond strength of porcelain veneer to zirconia core. The flexural strength of nanoparticles-modified porcelain was also evaluated.

Materials and Methods:

The flexural strength of feldspathic porcelain was measured (according to ISO specifications number 6872) after the incorporation of silver and titanium oxide nanoparticles. For measuring the bond strength at the porcelain-zirconia interface, 70 bars (4 × 4 × 12 mm) of zirconia were cut and fired in a furnace. The control and nanoparticles-modified porcelain powders were built up on the zirconia bars and fired to create veneers of 3 mm height, 4 mm width and 4 mm thickness. The porcelain veneers were de-attached from the zirconia core by the universal testing machine. The failure load was recorded to calculate the bond strength.

Statistical Analysis:

The data were analysed with one-way analysis of variance followed by Tukey's test.

Results:

The addition of 0.5–1.5% silver oxide nanoparticles to feldspathic porcelain increased the flexural strength. The addition of 1.0–4.0% titanium oxide nanoparticles to feldspathic porcelain increased the flexural strength. Either 0.5–1.0% silver oxide or 3.0–4.0% titanium oxide nanoparticles in feldspathic porcelain increased the shear bond strength to zirconia core.

Conclusion:

The flexural strength of porcelain veneer and the bond strength at porcelain-zirconia interface can be improved by adding either 0.5% silver oxide nanoparticles or 4% titanium oxide nanoparticles to porcelain powder.
Caries Experience Scores Revisited for Caries Risk Assessment Using Cariogram Model – A Cross-Sectional Study
Authors: Patnana Arun Kumar , Chugh Ankita , Chugh Vinay Kumar , Rathore Kanupriya , Solanki Ira , Kumar Pravin
Published: October 2022

Context:

The widely accepted caries risk assessment tools such as the Cariogram model needs modifications in the scoring of different factors for reliable results.

Aims:

The study was aimed to report the caries experience in 3-60 years of the Rajasthan population and to apply the newly derived average decayed exfoliated filled teeth/Decayed Missing Filled Teeth (deft/DMFT) scores in the Cariogram model to assess the caries risk.

Settings and Design:

The cross-sectional study was planned in the Department of Dentistry and a total of 500 participants were equally divided into five groups (3-6, 7-12, 13-30, 31-44, and 45-60 years) were included.

Methods and Material:

All participants were examined for caries detection using deft/DMFT, ICDAS, and CAST indices according to the predefined protocol. A single examiner evaluated the participants in a dental operatory and data was recorded.

Statistical Analysis Used:

One-Way ANOVA and Tukey's Post-Hoc tests were used to evaluate the significant difference between the groups of each caries index.

Results:

A statistically significant difference was observed between the mean deft/DMFT and CAST scores of 3-6, 7-12, and 13-30 age groups with the 45-60 years age group. Caries prevalence was highest (83%) in 31-44 and 45-60 year age groups and lowest (51%) in the 3-6 year age group.

Conclusions:

Caries experience scores increase as the age increases and the highest scores were observed in 31-44 and 45-60 year age groups and the lowest were observed in the 3-6 year age group. The average ICDAS and CAST scores were higher when compared to the deft/DMFT index.
Serum Lactate Dehydrogenase in the Prognostic Assessment of Patients with Oral Squamous Cell Carcinoma
Authors: Sudha Jimson , Julius Amaladas , Jimson Samson , Padmavathy Kesavaram
Published: October 2022

Background:

Lactate dehydrogenase (LDH) has been proven to be a diagnostic marker in oral squamous cell carcinoma (OSCC). However, the prognostic value of serum LDH in OSCC is yet to be explored. The purpose of this study is to correlate the level of serum LDH with the degree of OSCC and to evaluate the role of serum LDH as a prognostic marker in OSCC.

Methods:

The investigators designed and implemented a prospective cohort study composed of patients with OSCC (n = 66) sub-grouped as follows: 2A—well-differentiated (n = 22), 2B—moderately differentiated (n = 22), 2C—poorly differentiated OSCC (n = 22), and normal healthy controls (n = 40). The primary outcome variable was the serum LDH measured at baseline (pre-treatment) and 2 and 12 months post-treatment in OSCC patients. The statistical analysis was performed using the student t-test and analysis of variance, and the P value was set at 0.05.

Results:

The habit of alcohol consumption alone as a single habit was found only in males (17.5%) (P = 0.3343), whereas betel quid chewing was more common among females (P = 0.0182). A significant difference was observed in the mean serum LDH between OSCC subjects (pre-treatment) (831.56 ± 93.43 IU/L) and controls (188.82 ± 25.53 IU/L), P < 0.00001. The baseline serum LDH was significantly higher in subgroup 2C (933.41 ± 46.1969 IU/L) than in the 2A (742.59 ± 46.5676 IU/L) and 2B (818.68 ± 58.1643 IU/L) subgroups (P = 0). There was a significant decline in the serum LDH within 2 months after treatment, and a further decrement was observed during a 12-month follow-up among the survivors of all three subgroups; P < 0.00001.

Conclusion:

Serum LDH can play a dual role as a reliable indicator of the degree of OSCC for decision-making in treatment modalities and as a prognostic marker of response to therapy.
Use of Pulp Tissue of Deciduous Teeth for Gender Determination - A Comparative Molecular Analysis Study
Authors: Manju R , Ravi MS
Published: October 2022

Aim:

The present study aimed to evaluate the effectiveness of pulp tissue collected from deciduous teeth for the determination of gender using polymerase chain reaction (PCR).

Materials and Methods:

140 extracted deciduous teeth were selected. The control group comprised 20 teeth that were subjected to DNA analysis immediately. Whereas Group I and Group II consisted of 60 teeth which were stored in the open environment and salt water, respectively, for a period of 3, 9, and 15 months. DNA was isolated and quantified followed by the amplification of X and Y chromosomes by PCR and compared with the actual gender of the child. The data were analysed using the Shapiro-Wilk test, the independent sample t-test, paired t-test, and the Chi-square test.

Result:

The PCR analysis results of Group I showed a more correct interpretation of gender as compared to Group II on storage for a period of 15 months. The PCR analysis results of the Control group showed a 100% accuracy rate as compared to the samples in Groups I and II.

Conclusions:

Gender could be effectively determined from the samples evaluated immediately after extraction. But the period of storage and the method of storage conditions affected the quality of isolated DNA and thus decreased the ability of gender determination.