35 research outputs found
Methodological aspects in the experimental measurement of the interface friction between geosynthetics.
No full textAbstractThe evaluation of the interface friction at the contact between geosynthetics is a very important feature in a safe design of landfills and similar earth structures. Coupling different geosynthetics to fulfil multiple functions may be a critical point, due to the low frictional properties of such products. As a consequence, the assessment of the degree of safety of earth structures including geosynthetics requires a characterization of the interface strength and of its evolution with displacements. Some results obtained at the University of Padua will be presented with reference to experimental measurements of the interface friction between geosynthetics, in different conditions, to highlight the complexity of the friction phenomena and their dependence on experimental conditions
Parenté, catégories économiques et théorie du pouvoir. Le cas des Nzema du Ghana
No full textAbstract
Kinship, Economie Categories and Theories of Power: The Case of the Nzema (Ghana). — The matrilineal Nzema of southwestern Ghana are mainly farmers and fishers belonging to the Akan language group. The author studied the Nzema economic system of thought with reference to the traditional kinship and political organization. The funda-mental aspects of that System have to do with the structural relation between matrilineal descent and patrilocal bonds in the sense of the Crow kinship terminology. The father-son relationship has crucial, economic and political, importance, even though it is also a source of conflict (at a level that is more theoretical and practical) in matters of inheritance. The analysis of economic categories sheds light on the coherence of the local system of thought, and on its adjustment to modemization as well as its adaptations to the political and matrimonial strategies that ruling groups adopt in order to keep power and wealth.Résumé
Les Nzema du Ghana sud-occidental sont des cultivateurs matrilinéaires du regroupement akan. L'auteur, au cours d'une recherche qui se déroule depuis 1989, a étudié le système de pensée économique par rapport à l'organisation des relations de parenté et du système politique traditionnel. Les caractères fondamentaux de ce système concernent le rapport entre matrifiliation (oncles maternels/neveux utérins) et patrifiliation (pères/fils), dans le sens que la terminologie de parenté de type crow assigne à ces catégories. La relation entre pères et fils s'avère d'une importance cruciale du point de vue politique et économique, même si elle représente la source de conflits, à un niveau aussi bien théorique que pratique, par rapport aux enjeux de la succession héréditaire. L'analyse des catégories économiques donne à l'auteur la possibilité de démontrer la cohérence du système local de pensée et son caractère fonctionnel dans le processus de modernisation comme dans les stratégies de conservation du pouvoir menées par les groupes dominants.Pavanello Mariano. Parenté, catégories économiques et théorie du pouvoir. Le cas des Nzema du Ghana. In: Cahiers d'études africaines, vol. 36, n°143, 1996. pp. 373-396
Correction to: Nutraceutical approach for the management of cardiovascular risk - a combination containing the probiotic Bifidobacterium longum BB536 and red yeast rice extract: results from a randomized, double-blind, placebocontrolled study (Nutrition Journal (2019) 18 (13) DOI: 10.1186/s12937-019-0438-2)
No full textFollowing publication of the original article[1], the authors reported an error in the affiliation of the third author, Sara Gandini. The correct affiliation should read: Division of Epidemiology and Biostatistics, IEO, European Institute of Oncology IRCCS, Milan, Italy
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Five Years in Theoretical and Computational Chemistry: From H3+ to DNA
No full textThe research described in this dissertation concerns two fields of theoretical chemistry: Part I concerns applications of Density Functional Theory, and part II high accuracy calculations within the Born-Oppenheimer approximation using explicitly correlated Gaussian functions.In the first part, after a brief introduction to Density Functional Theory and Hartree Fock methods, the candidate's research in Density Functional Theory is described in two chapters. One treats the charge transport in B-DNA, specifically (GC) oligomers solvated by water. The second chapter treats the charge transfer between the Lithium atom and Fullerene-C in the endohedral complex Li@C. In both applications Density Functional Theory was the central quantum mechanical technique that allowed the approaching of such large molecular systems.In the second part of this dissertation, the candidate's development of a FORTRAN code using explicitly correlated Gaussian functions within the Born-Oppenheimer approximation is presented.Every item of the author's research during his graduate studies has been published in co-authorship with the author's scientific advisor and other collaborators in peer-reviewed journals. A total of 8 scientific articles and one letter have been published by the author while at The University of Arizona
Introduzione a Sessione I Antropologia medica e Sanità Pubblica nel Lazio
No full textIl testo introduce la sessione del volume dedicata agli esiti delle ricerche condotte - sotto la guida dell'Autore - da giovani ricercatori della Sapienza presso diverse strutture sanitarie pubbliche del Lazio, su temi di antropologia medica quali la valutazione dei servizi di emergenza, i trapianti di cuore, le narrazioni di degenza ospedaliera, l'assistenza domiciliare infermieristica, fisioterapica e sociale.The text introduces the session of the volume devoted to the results of research conducted - under the guidance of the author - by young researchers of Wisdom at different public hospitals of Lazio, on issues of medical anthropology such as the assessment of the emergency services, transplants heart, the narratives of hospitalization, nursing home care, physiotherapy and social
Topology optimization considering design-dependent Stokes flow loads
No full textThis article presents an evolutionary topology optimization method for mean compliance minimization of structures under design-dependent viscous fluid flow loads. The structural domain is governed by the elasticity equation and the fluid by the incompressible Stokes flow equations. When the modelling of a system consists in the interaction of multiple domains, the classic density-based topology optimization methods become arduous within the framework of dealing with the moving multi-physics loads and interfaces, due to the considerable volume of intermediate density elements. Herein it is suggested an alternative methodology to handle this type of loading problems. With an extended Bi-directional Evolutionary Structural Optimization (BESO) method, design-dependent Stokes flow loads are modelled straightforward during the optimization procedure. The discrete nature of the method allows both fluid and structural domains to be modelled separately in each step of the optimization. In order to validate the methodology, only small structural displacements and a simple staggered fluid-structure interaction algorithm are considered in this paper. Primary results are shown for a 2D flexible structure immersed in an incompressible viscous flow channel.Computational Design and Mechanic
Where Christianity is ancient. Pentecostalism, evil in the world and the break with the past in Ethiopia
No full textPentecostal and Protestant churches have had a dramatical spread in Ethiopia in the last decades, especially after the civil war and the establishment of religious freedom in the countries. During the emperor Haile Selassie time and, later, the communist dictatorship, both Pentecostal and Protestant fellows
have been persecuted. Starting from this common destiny the two streams are very linked in the country. The paper will focus on the specificity of the Pentecostal movements. By highlighting the most relevant figures and discussing the history of its development, the author wants to understand how those churches situate themselves in a country where Christianity is very old, being introduced during the IV century A.D.. Christianity, then, it is not a legacy of colonialism, differently from other African countries. Which are the contents of the Pentecostal preaching in such a context? The paper try to answer to this question by exploring the development of the movement and the discourses and practices through which it tries to find a room in the religious field. The demonization of the past, characterized by the persecution, is one of the investigated field. On the other hand the paper examines the fight against the Coptic Orthodox Church which is the hegemonic religion in the country. The Pentecostal churches demonize it and its practices, i. e. the use of the holy water sources, as in the other African countries they do with the traditional religions
Ensino de frações e da função quadrática: uma abordagem alternativa ao modelo tradicional
Get PDFThis research aims to provide a discussion after the presentation of two experiments that were conducted intervention trying to give a grant to a pedagogical alternative to the traditional
model. As this is a descriptive research, we aim not indicate paths or presenting solutions to
problems, and for having in his rise characteristics of a case study, we examine in making
only the reports of our experience and base our actions without major theoretical debates. For
this, we present the memorial to draw in the reader a profile of the author of the study and
describe our experience in the discipline of mandatory intervention Supervised III, offered by
the Federal University of Paraíba. After that, we brief quotations and theoretical debates,
where we highlight Japiassu (2006), Pavanello (2004), Kleiman and Morais (1999), among
others, to write on Contextualization, Interdisciplinary, Reading and Troubleshooting. We
also present our experience of intervention about content Quadratic Function in a class of high
school and eventually we have our final considerations.Essa pesquisa tem como objetivo fornecer uma reflexão após a apresentação de duas experiências de intervenção que foram realizadas tentando dar um subsídio a uma prática pedagógica alternativa ao modelo tradicional. Por tratar-se de uma pesquisa descritiva, não temos como objetivo indicar caminhos ou apresentar soluções a problemáticas, e por haver em seu ensejo características de um estudo de caso, nos debruçamos em fazer apenas os relatos de nossa experiência e fundamentar nossas ações sem grandes debates teóricos. Para isso, apresentamos o memorial para desenhar no leitor um perfil do autor da pesquisa e descrevemos nossa experiência de intervenção obrigatória na disciplina de Estágio Supervisionado III, ofertada pela Universidade Federal da Paraíba. Após isso, fazemos breves citações e debates teóricos, onde destacamos Japiassu (2006), Pavanello (2004), Kleiman e Morais (1999), entre outros, a fim de versamos sobre Contextualização, Interdisciplinaridade,
Leitura e Resolução de Problemas. Também apresentamos nossa experiência de intervenção sobre o conteúdo Função Quadrática em uma turma de Ensino Médio e por fim tecemos nossas considerações finais
Delinquency and the (im) possibility of meaning as an author in mathematical discourse. 2
No full textThis PhD research was developed into a socio-educational center, where the researcher works as a Math teacher. It was elected by objective to analyze the (non) meaning of mathematics in adolescent discourse, who is in socio educational measures in the center, in relations produced with the social described in his stories of life and as the author of Problem Situations. The question that drives the research is: Working with adolescents into a socio-educational center, how to open space for this student author in mathematical practice from his life stories? In order to situate the reader, there is a historic resumption of socio education implementation, as it is known today, after the enactment of the Children and Adolescents Statute and the National socio-educational System. These two legal frameworks, together with the legal relations introduced, weave a way to determine the adolescent subject in conflict with the law: he who transgresses social rules and must be punished for it. To unveil the production conditions of juvenile detainees are the themselves written in the form of life narratives, often brought by marginality that point the way. To think the institutional relationship, the research has Chevallard, since this author brings the concept of Didactic Transposition to deal with the passage between the scientific knowledge produced and the academic knowledge. In this Institutional relationship that makes a contrast to Althusser, who thinks the institutions, including the school, as Ideological State Apparatuses. At this work there is concern in conducting a study about the Curriculum of Mathematics to investigate its implementation in the official documents of the Education departments, and go its way until it get to the school. The analytical theoretical scope, Discourse Analysis, in historical materialism, based on Pêcheux and Eni Orlandi served the necessary analyzes. This theory directs the research for the discursive functioning as other sayings tension, crossed by the adolescent had heard, remembered or forgotten during the months in which he was in the socio education center. From the life narratives it opened up the possibility of the intersection of this with the mathematical content. The research seeks to understand in the adolescent's words, his understanding about mathematics curriculum, taught in schools as an essential discipline. For this, it established a process of authorship, in which the adolescent produces Math's Problem situations. In addition, the subject of this work produced individual reports, the analysis of which allowed a fruitful relationship with the elaborated problem situations. As a result of the research it was found in the adolescent discourse the possibility to review your past achievement conditions before his admission and makes a plan for a possible productions later. With the DA approach and the mathematics by the bias of the authorship problem situations, a different possibility is experienced in the educational activities within a math class. The teenager, proposes a Problem Situation, writes part of his own experience and makes connections with mathematical content, even with concepts had not been studied yet. It was found a possibility of encouraging this student to write something that makes sense to him, and simultaneously destabilizes his certainties in this way, he himself feels the necessity to find an answer that is not built, often it is not known. In Problem Situations, developed by adolescents, it is possible to advance to the understanding of a social position, working socially beyond the classroom. During this process, the subject position of adolescents who are in the center is (un) built when the misconception link these positions can uncover something beyond school, reaching the Social Practice.A presente pesquisa de Doutorado desenvolveu-se em um Centro de Socioeducação, no qual a pesquisadora trabalha como professora de Matemática. Elegeu-se por objetivo, desta pesquisa, analisar os (não) sentidos das matemáticas no discurso do adolescente, que cumpre medida socioeducativa - de internação, nas relações produzidas com o social, descritas em suas narrativas de vida e na autoria de Situações Problema. A pergunta que move a pesquisa é: Trabalhando com adolescentes internados em um Centro de Socioeducação, como abrir espaço para a autoria na prática matemática desses alunos a partir de suas narrativas de vida? A fim de localizar o leitor, faz-se uma retomada histórica da implantação da socioeducação, como é conhecida hoje, depois da promulgação do Estatuto da Criança e do Adolescente e do Sistema Nacional de Socioeducação. Esses dois marcos legais, em conjunto com as relações jurídicas instauradas, tecem um modo de determinar o sujeito adolescente em conflito com a Lei: aquele que transgride uma regra social e tem que ser punido por isso. Para desvelar as condições de produção dos adolescentes internados são as escritas de si, na forma de narrativas de vida, instauradas muitas vezes na marginalidade que apontam um caminho. A fim de pensar a relação institucional, a pesquisa apresenta Chevallard, uma vez que esse autor traz o conceito de Transposição Didática para tratar da passagem entre o conhecimento produzido cientificamente e o conhecimento escolar. Nessa relação institucional faz-se um contraponto com Althusser, que pensa as Instituições, incluindo-se a escola, como Aparelhos Ideológicos de Estado. No trabalho há a preocupação em realizar um estudo sobre o Currículo de Matemática para investigar a sua implantação nos documentos oficiais das Secretarias de Educação, além de percorrer seu caminho até que chegue à Escola. O escopo teórico analítico, a Análise de Discurso, na perspectiva materialista histórica, pautada em Michel Pêcheux e Eni Orlandi serviu às análises necessárias. Essa teoria direciona a pesquisa para o funcionamento discursivo, enquanto tensão de dizeres outros, atravessados pelo que o adolescente ouviu, lembrou ou esqueceu, durante os meses em que esteve internado. A partir das narrativas de vida abriu-se a possibilidade do entrecruzamento desta com os conteúdos matemáticos. A pesquisa busca compreender nas palavras do adolescente, o seu entendimento sobre a Matemática curricular, ensinada nas escolas como disciplina essencial. Para isso, é estabelecido um processo de autoria, no qual o adolescente produz Situações Problema de Matemática. Além disso, o sujeito desse trabalho produziu relatos pessoais, cuja análise permitiu uma profícua relação com as Situações Problema elaboradas. Como resultado da pesquisa encontrou-se no discurso do adolescente a possibilidade de (re)visitar o antes que compõe suas condições de produção anteriores à sua internação e realizar um planejamento de um possível depois. Com a aproximação da AD e a Matemática pelo viés da autoria de Situações Problema, vivenciou-se uma possibilidade diferenciada na atuação pedagógica dentro de uma aula de Matemática. O adolescente, ao propor uma Situação Problema, textualiza parte de sua própria vivência e faz as ligações com conteúdos matemáticos, até mesmo com conceitos ainda não estudados. Encontrou-se uma possibilidade de incentivar o aluno a escrever algo que lhe faz sentido, e, simultaneamente desestabiliza suas certezas, desta forma, ele sente a necessidade de encontrar uma resposta que ainda não está construída, muitas vezes não conhecida. Nas Situações Problema, elaboradas pelos adolescentes, é possível avançar para a compreensão de uma posição social, daquilo que funciona socialmente para além da sala de aula. Durante esse processo, a posição sujeito dos adolescentes que se encontram internados são (des)construídas quando no enlace equívoco dessas posições é possível descortinar algo para além da Escola, chegando à Prática Social.192
