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Participação dos receptores gabaérgicos, serotoninérgicos e adrenérgicos do núcleo do trato solitário na ingestão de água e sódio induzida por diferentes tipos de desidratação
(Universidade Federal de São Carlos, 2016-12-20)
Tomeo, Rodrigo Anderson
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Paula, Patrícia Maria de
;
https://lattes.cnpq.br/0201361251312074
;
https://lattes.cnpq.br/2675300056814074
The nucleus of the solitary tract (NTS), the primary site of peripheral osmoreceptor and cardiovascular afferences, is suggested to receive important inhibitory signals involved in the control of water and sodium intake. However, it is not known which neurotransmitters are involved in the transmission of this information. Central gabaergic, serotonergic and adrenergic mechanisms are involved in the control of sodium and water intake and immunohistochemical studies have shown that these receptors are present in the NTS. Therefore, in the present study, we investigated the effects of muscimol (a GABAA receptor agonist), DOI (a serotonergic 5-HT2A/2C receptor agonist), methysergide (a serotonergic 5-HT1/2 receptor antagonist) and moxonidine (α2 adrenergic/imidazoline receptor agonist) injected into the NTS on water and 0.3 M NaCl intake induced by intragastric load of 2 M NaCl (a cellular dehydration protocol), by intracerebroventricular (icv) angiotensin II (ANG II) or by sodium depletion (furosemide + 24 h diet deficient in sodium, a extracellular dehydration protocol). Holtzman rats (290-310 g, n=3-20) had stainless steel cannulas implanted bilaterally into the NTS and into the lateral ventricle (LV). Bilateral injection of muscimol (0.25 and 0.5 nmol/100 nl), and DOI (2.5 μg/100 nl) reduced water intake induced by intragastric load of 2 M NaCl (2 ml/rat) and water intake induced by icv ANG II (50 ng/100nl) without changing 0.3 M NaCl intake. Bilateral injection of DOI reduced water intake induced by icv ANG II. However, DOI produced no changes in the 0.3 M NaCl and water intake induced by sodium depletion. Injections of methysergide (2 μg/100 nl) produced no changes in the water and 0.3 M NaCl intake induced by intragastric load of 2 M NaCl, icv ANG II or sodium depletion. The pre-treatment with methysergide blocked the effect of DOI on water intake induced by intragastric load of 2 M NaCl. Besides that, bilateral injections of moxonidine (0.5 and 5 nmol/100 nl) produced no changes on water intake induced by intragastric load of 2 M NaCl. The results suggest that gabaergic, serotonergic, but not adrenergic, receptors in the NTS are part of a mechanism involved in the inhibitory control of water intake induced by cellular dehydration. Our results also suggest that serotonergic receptors into the NTS participate in the control of water intake induced by icv injection of ANG II.
Entre experiências e diferenças nas mídias digitais : modos de uso e desejos-hashtag na #seráqueéracismo
(Universidade Federal de São Carlos, 2016-12-20)
Baboni, Renata
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Sanchez, Fábio José Bechara
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https://lattes.cnpq.br/6423443695464907
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https://lattes.cnpq.br/5510971486260967
The research inquired into the relation among ways of using and the identification processes involving #seráqueéracismo on Twitter. Therefore, it unveiled how the differences were articulated in the discourses about racialized experiences by means of analyzing published content and semi-structured interviews with the influencers, widely shared narratives producers. Analytical axes such as experiences and diferences were used, in the relation between gender, sexuality, race and social class, through Queer Studies. In these negotiations about differences, the hashtag, communication mode about itself, was very characterized by narratives about emotions. These ways of using it, on one hand, are configured by a certain contestatory practice of a racist current norm's perception in some narratives and, on the other hand, enabled an aperture of a discussion about the existence or not of racism in other narratives. In this game of experiences ambivalences, sometimes were reproduced and sometimes were contested normalizations about differences, by means of position delimitations and stereotyping individuals. It was also very frequent the description of racism in the other, directly linked to the social acknowledge desire that rules those ways of using (so many times denied to the nonwhite, conferring on them the victimization and accountability on the existence of racism).
A mean-field game model of economic growth : an essay in regularity theory
(Universidade Federal de São Carlos, 2016-12-20)
Lima, Lucas Fabiano
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Pimentel, Edgard Almeida
;
https://lattes.cnpq.br/4664734271138581
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https://lattes.cnpq.br/9171086482555658
In this thesis, we present a priori estimates for solutions of a mean-field game (MFG) defined over a bounded domain Ω ⊂ ℝd. We propose an application of these results to a model of capital and wealth accumulation. In Chapter 1, an introduction to mean-field games is presented. We also put forward some of the motivation from Economics and discuss previous developments in the theory of differential games. These comments aim at indicating the connection between mean-field games theory, its applications and the realm of Mathematical Analysis. In Chapter 2, we present an optimal control problem. Here, the agents are supposed to be undistinguishable, rational and intelligent. Undistinguishable means that every agent is governed by the same stochastic differential equation. Rational means that all efforts of the agent is to maximize a payoff functional. Intelligent means that they are able to solve an optimal control problem. Once we describe this (stochastic) optimal control problem, we produce a heuristic derivation of the mean-field games system, which is summarized in a Verification Theorem; this gives rise to the Hamilton-Jacobi equation (HJ). After that, we obtain the Fokker-Plank equation (FP). Finally, we present a representation formula for the solutions to the (HJ) equation, together with some regularity results. In Chapter 3, a specific optimal control problem is described and the associated MFG is presented. This MFG is prescribed in a bounded domain Ω ⊂ ℝd, which introduces substantialadditional challenges from the mathematical view point. This is due to estimates for the solutionsat the boundary in Lp. The rest of the chapter puts forward two well known tips of estimates: theso-called Hopf-Lax formula and the First Order Estimate. In Chapter 4, the wealth and capital accumulation mean-field game model is presented. The relevance of studying MFG in a bounded domain then becomes clear. In light of the results obtained in Chapter 3, we close Chapter 4 with the Hopf-Lax formula, and the First Order estimates. Three appendices close this thesis. They gather elementary material on Stochastic Calculus and Functional Analysis.
O velho e o novo rural em Araras: análise do desenvolvimento rural a partir de uma categorização dos setores censitários
(Universidade Federal de São Carlos, 2016-12-20)
Farbelow, Marcus Vinícius
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Montebello, Adriana Estela Sanjuan
;
https://lattes.cnpq.br/4326971138357942
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https://lattes.cnpq.br/4749660956412878
The rapid and intense transformations that took place in the Brazilian countryside generated new configurations and productive arrangements, which, in different combinations and tensions with the so - called traditional formations, can be considered responsible for the complexity and heterogeneity prevailing in the contemporary rural landscape. In spite of the growing number of studies dedicated to the theme, there are very few that seek to analyze the diversity of compositions existing within the municipalities. The present work aims to contribute to the literature on rural development and rural settings by proposing to classify the rural sectors of the municipality of Araras, State of São Paulo, through the Demographic Census (2010), State of São Paulo, using criteria that allow them to capture their specificities (sectors for tourism, agricultural sectors, recreational farms, among others). In addition, this dissertation aims to present a Rural Development Index (IDR) for each category of the municipality in question, providing subsidies for the formulation and implementation of public policies. The methodology used was Group Analysis. The results obtained allow us to conclude that, even in a relatively small municipality, there are different rural realities, which demand different modes of interpretation and intervention. Considering that, this work has sought to generate not only the application of the same methodology in other areas of interest (municipalities, hydrographic basins, microregions, among others), but also to improve the techniques utilized and to carry out complementary studies, mainly off qualitative character, related to the multiple configurations of the rural world
Discursos midiáticos e preconceito linguístico em disputa pelo dizer e silenciar
(Universidade Federal de São Carlos, 2016-12-20)
Viveiros, Danielle Christiane da Silva
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Riscal, Sandra Aparecida
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https://lattes.cnpq.br/0328618752218708
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https://lattes.cnpq.br/8476572172406508
Taking into consideration that speaking differently does not mean speaking “wrongly”, and that, many times, the linguistic heterogeneity is not acknowledge by the school and/or Portuguese language teachers, this work aims at contributing to the development of studies linked to the linguistic variables. The most common practices have been the prejudice and the intolerance in relation to the popular speaking forms, which are stigmatized and excluded as wrong forms. Although, in the last decade, the educational legislation has been making the guidelines that exclude the popular discourse form less rigid, we can see resistance to this idea, which is not only reinforced, but also embraced by the general press and by the means of communication. This work discusses the needs for adopting a political posturs in relation to this subject, which acknowledges that the point cannot be simplified to the adoption of a correct and true speaking form, whose arguments, in fact are in service of the maintenance of an authoritarian order, based on privileges and that excludes all those who do not practice the standardized form of the Portuguese language. Thus, the proposed aim for this work, as a result of bibliographical and documented research, is a linguistic reflection concerning the relation between: discourse, identity and alterity, as well as an analysis of the mediatic speeches produced since 2001 up to current times referring to the thematic, seeing these speeches as power and knowledge devices. The linguistic stigmatization remains as an impregnable beacon of inequality and finds support among the professors and students of Language, Linguistic and Pedagogy who intend to stablish a sort of monopoly over the national linguistic forms and manifestations. On the other hand, many researchers in the linguistic field have dedicated their research to the valorization of the popular speaking forms. Through a bibliographical study, the theoretical conceptions of the research are presented inside the functionalist and sociolinguistic perspective, basically aiming the communicative competence, a theory shown in: Bakhtin (1979 and 1992), Labov (2008), Neves (1990, 1997, 2003, 2006 and 2010), Bagno (2003, 2009, 2010 and 2011), Leite (2005 and 2008), Possenti (2005 and 2012), Gnerre (2009); Bortoni-Ricardo (2004 and 2005) among others; in addition to the scholars linked to the Human Sciences who deals with the study of the discourse as language is a social behavior and manifestation of the fight for power– Foucault (1995, 1996, 1999 and 2009), of Philosophy and Bourdieu (1975, 1989, 1998, 2001 e 2008), of Sociology and Habermas (1987). This way, the analysis focus in the real usages of the language and pursues the explanation of these processes activated in various textual genres (journalistic, political debates, cartoons, charges, paintings and pictures) to exemplify the analysis and the theoretical apparatus as well. Concerning the teaching of the Portuguese language, speeches and documents related to the new forms to teach grammar are not enough if these are not incorporated to the pedagogical practice. The grammar teaching should be brought close to the reality of the usage and dynamism of the Portuguese language; however, we cannot forget that the norms in the grammar compendium have a space, which, necessarily, should be respected and taught. Furthermore, when we praise the standard practice of the language and raise the view of “right” and “wrong”, without considering the other forms of the language, the mediatic speeches help to spread the linguistic prejudice. The prejudiced metadiscourse also report other prejudices of social, racial, political, religious order among others and the teachers and school administrators need to know how to acknowledge them within the school scope in order to, on one side, act in a critical and conscious way in the face of the occurrences of these phenomena and to, on the other side, help to avoid its manifestation. Such attitude is part of the whole development of citizenship, because it is also an indicative of respecting the differences of the other.
Composição da fauna de formigas (Hymenoptera: Formicidae) de serapilheira em floresta semidecídua no Parque Estadual de Águas da Prata, São Paulo
(Universidade Federal de São Carlos, 2016-12-22)
Carvalho, Ana Carolina Nicolau de
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Canali, Murilo
;
Morini, Maria Santina de Castro
;
https://lattes.cnpq.br/2516452266649545
;
https://orcid.org/0000-0002-1823-6703
The present study aimed to evaluate the composition of the leaf litter ant fauna (Hymenoptera: Formicidae) in the Águas da Prata State Park, a 48.4-hectare fragment of Semideciduous Forest within the Atlantic Forest biome, located in the municipality of Águas da Prata, SP. Collections were conducted in June 2016. A transect of 400 m in length was marked, located 100 m away from the fragment's edge to eliminate the edge effect. Twenty sampling points were defined, spaced 20 m apart. At each point, two samples were collected, one to the left and one to the right of the transect, 20 m apart, where a 1 m² plot of leaf litter was scraped, collected, sieved, and placed in properly identified fabric bags. The sieved material was introduced into mini-Winkler-type extractors for 48 hours. The collected material was properly identified into morphospecies and compared with specimens deposited in the regional ant collection of the Bacia Hidrográfica do Alto Tietê (UMC, Mogi das Cruzes, SP). A total of 7,389 ants were sampled, distributed in six subfamilies (Dolichoderinae, Ectatomminae, Heteroponerinae, Myrmicinae, Ponerinae, and Proceratiinae), 19 genera, and 26 species. Myrmicinae was the most species-rich subfamily (19), followed by Ponerinae (3). Dolichoderinae, Ectatomminae, Proceratiinae, and Heteroponerinae were represented by a single species each. The genera with the highest richness were Solenopsis, with four species, and Pheidole with three. The most abundant genera were Solenopsis (4,131) and Hypoponera (1,032), and the most abundant species were Solenopsis sp. 2 (3,486) and Hypoponera sp. 4 (1,032). The study provided a list of ant species occurring in the leaf litter in the Águas da Prata State Park, contributing to the understanding of the species in this fragment. It can be used to characterize the current conservation status of the forest fragment about its ant fauna and may serve as a reference for future biodiversity conservation actions.
As percepções e práticas de publicação em acesso aberto dos pesquisadores de dois programas de pós-graduação em Engenharia
(Universidade Federal de São Carlos, 2017)
Guirra, Daniel Andre Rigo
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Furnival, Ariadne Chloe Mary
;
https://lattes.cnpq.br/5924083706738817
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https://lattes.cnpq.br/1291482506649810
Apresenta os resultados de um estudo que buscou conhecer as práticas e percepções de pesquisadores credenciados em dois programas de pós-graduação em engenharia, avaliados com nota sete pela CAPES, em relação à publicação em canais de acesso aberto comparado com aqueles restritos, de assinatura. Foi usada uma abordagem metodológica mista. Dados de publicação referentes ao período 2008 a 2016 foram levantados e tabulados dos currículos Lattes dos pesquisadores usando os softwares ScriptLattes e VantagePoint respectivamente. Os 244 títulos de revistas científicas e os 970 artigos identificados dessa fase foram então pesquisados em outras plataformas como o SciELO, DOAJ, SHERPA/ROMEO, Google Acadêmico e o próprio Repositório Institucional da instituição dos programas de pós-graduação para verificar a proporção de artigos publicados disponíveís em acesso aberto. Concomitantemente a esses levantamentos quantitativos, foram realizadas entrevistas semiestruturadas com 11 pesquisadores dos dois programas para identificar suas percepções em relação à publicação em geral e especificamente em acesso aberto, e em repositórios abertos. Dos dados quantitativos levantados, foi verificado que apenas 21,9% dos artigos publicados do primeiro programa de pós e 29,8% do segundo estão disponíveis em acesso aberto. No entanto, nas entrevistas a maioria dos autores apoia o acesso aberto, embora manifestem pouco conhecimento sobre o acesso aberto em repositórios, incluindo aquele da sua própria instituição, como também desconhecem o caminho complementar de se publicar primeiramente em revistas de alto impacto com o posterior arquivamento do mesmo artigo no repositório, ao término do eventual tempo de embargo da editora.
Vantagens de citação do acesso aberto em periódicos selecionados da ciência da informação: uma análise ampliada aos indicadores altmétricos
(Universidade Federal de São Carlos, 2017)
Cintra, Paulo Roberto
;
Furnival, Ariadne Chloe Mary
;
Milanez, Douglas Henrique
;
https://lattes.cnpq.br/4162331040612067
;
https://lattes.cnpq.br/1291482506649810
Introdução: O acesso aberto diz respeito à literatura científica disponibilizada a qualquer usuário sem custos e livre das restrições de copyright e de licenciamento para seu reuso. Espera-se, de acordo com a hipótese do Open Access Citation Advantage, um aumento no número total de citações recebidas pelos artigos disponibilizados em acesso aberto com relação àqueles em acesso restrito. Objetivo: Analisar as possíveis vantagens de citações e menções na web social que o acesso aberto pode oferecer à área da Ciência da Informação. Metodologia: Foram analisados indicadores altmétricos e bibliométricos de citação de dois periódicos científicos: Journal of the American Society for Information Science e Scientometrics. A coleta dos dados foi realizada na Web of Science, Google Acadêmico, Altmetric.com e Mendeley. Resultados: Os resultados indicaram que o acesso aberto oferece vantagem quanto ao número de citações e de menções na web social recebidas pelos artigos em ambos as revistas. Verificou-se também que essa vantagem se mantém ao longo dos anos. Conclusões: A investigação confirma a hipótese do Open Access Citation Advantage para os periódicos selecionados da área da Ciência da Informação e demonstra que essa vantagem se estende aos dados altmétricos.
A experiência docente na formação inicial de professores: uma pesquisa bibliográfica sobre a importância de vivências práticas durante a graduação
(Universidade Federal de São Carlos, 2017)
Ricarte, Geovanni de Paula
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Severino, Natália Búrigo
;
https://lattes.cnpq.br/7473436068039477
;
https://orcid.org/0000-0001-8214-5139
This study conducted a literature review of articles published in the ABEM Journal between 2012 and 2016 in order to examine how practical experiences and teaching experiences of undergraduate Music Education students are addressed during their initial teacher education. The study includes a brief literature review on initial teacher education and music teacher education, presenting some of the legal requirements established for teacher education programs that promote practical experiences throughout the training process. The findings indicate that, although only a limited number of studies were identified within the selected time frame, all of them emphasize the importance of providing opportunities for undergraduate music education students to connect theory and practice. Therefore, the reviewed studies highlight the need for teacher education programs in music to create spaces that foster the integration of theoretical knowledge and practical teaching experience.
Os padrões de metadados como recursos tecnológicos para a garantia da preservação digital
(Universidade Federal de São Carlos, 2017)
Formenton, Danilo
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Gracioso, Luciana de Souza
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Castro, Fabiano Ferreira de
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Furnival, Ariadne Chloe Mary
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Simões, Maria da Graça de Melo
A garantia de preservação digital a longo prazo só será possível com a adoção efetiva de padrões ou esquemas de metadados, pois são eles que determinarão a descrição, a representação, a consistência e a persistência do recurso/objeto digital no ambiente informacional, além de definir a interoperabilidade entre sistemas. A adoção de metadados para preservação apoia a administração dos processos relativos ao arquivamento e à manutenção do acesso à informação digital a longo prazo, com garantias de autenticidade, de integridade e de confiabilidade. Neste cenário, foi objetivo do trabalho identificar e descrever padrões ou esquemas de metadados que poderiam ser considerados por instituições que estão desenvolvendo seus repositórios institucionais, para que possam contemplar a preservação digital. Para tanto, foi desenvolvida pesquisa bibliográfica e sistematização e análise de conteúdo. Foram selecionados e analisados os seguintes esquemas e padrões de metadados: DUBLIN CORE, MODS, EAD, ANSI/NISO Z39.87, METS e o PREMIS. A análise dos resultados indica que os metadados descritivos e técnicos do DC, MODS, EAD e ANSI/NISO Z39.87 ou MIX, possuem um papel mais direcionado a amparar o METS e o PREMIS, tanto na descoberta e no registro dos aspectos técnicos do objeto digital, como na comprovação de sua procedência, autenticidade, contexto e integridade. Englobando metadados descritivos, estruturais, administrativos e de preservação do PREMIS, o METS pode gerir os objetos digitais atuando como um Pacote de Submissão de Informação (PSI), Pacote de Arquivamento de Informação (PAI) ou Pacote de Disseminação de Informação (PDI) num Sistema Aberto de Arquivamento de Informação (SAAI).
Perspectivas para o uso da pesquisa observacional em biblioteca universitária: um estudo na coleção de periódicos
(Universidade Federal de São Carlos, 2017)
Augusto, José Aparecido
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Furnival, Ariadne Chloe Mary
;
Colepicolo, Eliane
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Simionato, Ana Carolina
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https://lattes.cnpq.br/1291482506649810
Analisa o uso da coleção de periódicos impressos em papel numa biblioteca universitária, por meio de pesquisa observacional estruturada, sistemática e não participante e também do levantamento de dados estatísticos de utilização, no período compreendido entre os anos de 2012 a 2015, junto à Biblioteca. Enquadra-se, academicamente, na grande área de “usos da informação e acervos”, com inspiração na contribuição intelectual de Lancaster e de outros grandes autores no campo de estudos de usuários. A partir dos dados obtidos, espera-se contribuir para um possível estabelecimento de uma política para readequação do espaço atualmente utilizado por este acervo de periódicos, visando colaborar com a comunidade acadêmica para estar em sintonia com as linhas de pesquisa e projetos desenvolvidos na Universidade.
Boi Curumim de Nazaré: um relato sobre a cultura popular tradicional de uma comunidade ribeirinha
(Universidade Federal de São Carlos, 2017)
Figueiredo, Rafaela Lopes
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Severino, Natália Búrigo
;
https://lattes.cnpq.br/7473436068039477
;
https://orcid.org/0000-0001-8214-5139
This study aimed to investigate and describe how a riverside community located in the rural area of Porto Velho, Rondônia, known as Nazaré, produces culture and, more specifically, performs the Boi Curumim, a popular cultural manifestation closely related to Bumba-meu-boi and Boi-Bumbá traditions. To this end, a study was conducted on traditional and riverside communities, as well as on the community of Nazaré, focusing on its cultural practices, musical manifestations, and modes of teaching and learning. Initially, an account is presented of my arrival in the community through NAPRA (Núcleo de Apoio às Comunidades Ribeirinhas da Amazônia – Center for Support to Amazonian Riverside Communities), an organization that operates in the region. Subsequently, the study discusses traditional and riverside populations and contextualizes the community of Nazaré based on surveys conducted by NAPRA and official sources. To support an understanding of research relating riverside communities to music education, a bibliographic survey was carried out to identify articles addressing the themes of Traditional Popular Culture and Music Education in four journals dedicated to Music, Education, and Culture. In order to understand and present the community of Nazaré, its cultural activities, aspects of its way of life, and especially the Boi Curumim tradition, field notes were recorded during immersion in the community, documenting the researcher’s observations. In addition, semi-structured interviews were conducted with community members (children and adults) and NAPRA members regarding their participation in Boi Curumim. These data contributed to the description of both the preparation process and the performance of the Boi Curumim of Nazaré. The theoretical framework adopted was based on NAPRA’s perspective on Popular Education. From this standpoint, the collected data were analyzed, discussed, and interpreted. Without intending to provide definitive conclusions, the final considerations highlight the need for music educators to “expose themselves” (in Bondía’s terms) to diverse musical and cultural manifestations, valuing traditional Brazilian culture in order to develop creative, integrative, and multicultural approaches to music teaching.
O acesso aberto à luz dos Estudos Sociais da Ciência e Tecnologia
(Universidade Federal de São Carlos, 2017)
Cintra, Paulo Roberto
;
Furnival, Ariadne Chloe Mary
;
Milanez, Douglas Henrique
;
https://lattes.cnpq.br/4162331040612067
;
https://lattes.cnpq.br/1291482506649810
O acesso aberto é um movimento em prol de uma literatura científica disponibilizada sem custos aos usuários e livre de restrições para seu reuso. Este ensaio tem por objetivo refletir sobre as mudanças trazidas pelo acesso aberto à comunicação científica à luz dos conceitos propostos pelos teóricos dos Estudos Sociais da Ciência e Tecnologia. Para tanto, o estudo se baseou nos imperativos institucionais de Merton, nos conceitos de Bourdieu sobre capital simbólico e nos argumentos de Latour acerca do arregimento de aliados. Concluiu-se que o acesso aberto tem potencial para alterar as disparidades hierárquicas existentes entre os pares, uma vez que possíveis ganhos em visibilidade, legibilidade e acessibilidade dos artigos disponibilizados em livre acesso, poderiam impactar positivamente na avaliação da produção dopesquisador junto às agências de fomento e instituições de ensino e, dessa forma, elevar seu capital científico.
Modeling based on a reparameterized Birnbaum-Saunders distribution for analysis of survival data
(Universidade Federal de São Carlos, 2017-01-09)
Leão, Jeremias da Silva
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Sanchez, Victor Eliseo Leiva
;
https://lattes.cnpq.br/8210845561629144
;
Tomazella, Vera Lucia Damasceno
;
https://lattes.cnpq.br/8870556978317000
In this thesis we propose models based on a reparameterized Birnbaum-Saunder (BS) distribution introduced by Santos-Neto et al. (2012) and Santos-Neto et al. (2014), to analyze survival data. Initially we introduce the Birnbaum-Saunders frailty model where we analyze the cases (i) with (ii) without covariates. Survival models with frailty are used when further information is nonavailable to explain the occurrence time of a medical event. The random effect is the “frailty”, which is introduced on the baseline hazard rate to control the unobservable heterogeneity of the patients. We use the maximum likelihood method to estimate the model parameters. We evaluate the performance of the estimators under different percentage of censured observations by a Monte Carlo study. Furthermore, we introduce a Birnbaum-Saunders regression frailty model where the maximum likelihood estimation of the model parameters with censored data as well as influence diagnostics for the new regression model are investigated. In the following we propose a cure rate Birnbaum-Saunders frailty model. An important advantage of this proposed model is the possibility to jointly consider the heterogeneity among patients by their frailties and the presence of a cured fraction of them. We consider likelihood-based methods to estimate the model parameters and to derive influence diagnostics for the model. In addition, we introduce a bivariate Birnbaum-Saunders distribution based on a parameterization of the Birnbaum-Saunders which has the mean as one of its parameters. We discuss the maximum likelihood estimation of the model parameters and show that these estimators can be obtained by solving non-linear equations. We then derive a regression model based on the proposed bivariate Birnbaum-Saunders distribution, which permits us to model data in their original scale. A simulation study is carried out to evaluate the performance of the maximum likelihood estimators. Finally, examples with real-data are performed to illustrate all the models proposed here.
Análise de eficiência de programas de pós-graduação em Engenharias III
(Universidade Federal de São Carlos, 2017-01-09)
Costa, Naijela Janaina da
;
Moralles, Herick Fernando
;
https://lattes.cnpq.br/3603674784653923
;
https://lattes.cnpq.br/9395111230471879
The effectiveness of Brazil's postgraduate programs is directly linked to the country's capacity for innovation, which entails the need to diagnose the causes of low academic achievement, as well as the development of techniques and methods to evaluate and measure performance Of educational units. In this sense, the objective of this project was to analyze the efficiency of postgraduate programs in Brazilian Engineering III. Through the application of the Data Envelopment Analysis (DEA) technique, the most efficient programs were identified, and through the Tobit Regression the degree of influence of certain inputs was determined (number of professor; scholars of CNPq; Number of students) in educational performance. The results of this project can contribute to a better understanding of the dynamics and determining factors of the national academic production, in order to generate knowledge about postgraduate programs, especially courses that did not reach the production efficiency standards Required by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
Avaliação do impacto do acesso aberto em periódicos da área da Ciência da Informação : uma análise de indicadores bibliométricos e altmétricos
(Universidade Federal de São Carlos, 2017-01-16)
Cintra, Paulo Roberto
;
Milanez, Douglas Henrique
;
https://lattes.cnpq.br/9233120345793647
;
Furnival, Ariadne Chloe Mary
;
https://lattes.cnpq.br/1291482506649810
The existence of innumerous barriers to access scientific knowledge gave rise to the movement in favor of open access. The impact of scientific research tends to be measured by the total number of citations the work gets, and so the hypothesis of a possible Open Access Citation Advantage (OACA) emerged, in which it is argued that the articles available in open access have an advantage in the number of citations in relation to those only available in restricted publications. However, assessing the impact of a scientific publication must go beyond the analysis of citations, as it is necessary to consider that scientists do not cite all references that may have influenced them during the research, and that other actors are also part of the scientific community. For these reasons, the use of alternative metrics to assist the evaluation of science has been discussed in a new subfield called Altmetrics. In this sense, the aim of this study was to investigate the potential benefits that open access can offer to the field of Information Science. Therefore, bibliometric citation indicators and altmetric indicators for four journals were collected and analyzed: Journal of the American Society for Information Science, Scientometrics, El Profesional de la Información and Transinformação. Data sources covered Web of Science, Google Scholar, Altmetric.com and Mendeley. The results indicated that open access actually offered advantages over the average number of citations and references in the social web received in all hybrid journals. This fact confirms the validity of the OACA hypothesis for the Information Science area. It was also found that this advantage is maintained, at least, until the eighth year after publication, and it extends to the altmetrics data.
Influência da microestrutura na resistência mecânica de ligas hipereutéticas Al-Si solidificadas direcionalmente
(Universidade Federal de São Carlos, 2017-01-18)
Reyes, Rodrigo André Valenzuela
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Spinelli, José Eduardo
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https://lattes.cnpq.br/8882038118634925
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https://lattes.cnpq.br/9357263200951932
The present research work deals with directional solidification (DS) of Al-15wt.% and 18wt.% Si alloys and further characterization of the related microstructures. Emphasis is given on the eutectic growth being affected not only by solidification kinetics (V-eutectic growth rate and G-thermal gradient) but also by melt superheat, which is varied in two degrees for each alloy, i.e., 6% and 23% above the liquidus temperature. The dependences of interphase spacing (X) on both solidification kinetics (fast, intermediate and slow cooling conditions) and on melt superheat during solidification of hypereutectic alloys are reported for the first time. Furthermore, functional experimental interrelations of tensile mechanical properties and interphase spacing between eutectic Si particles of both alloys evaluated are proposed. It is shown by these correlations that the tensile properties increase with the decrease in these spacings. More significant variations in properties are associated with a certain range of spacings (1.0^m < X < 2.3^m) in the case of the Al-15wt.%Si alloy. Tensile strength and elongation-to-fracture decrease with increasing alloy silicon content. The applicability of eutectic growth expressions such as X=f (V-1/2) and X=f (G-a x V-b) has been verified for the present tested alloys and experimental conditions.
Análise da microestrutura, parâmetros térmicos e de propriedades mecânicas na solidificação direcional de ligas Al-Mg-Fe
(Universidade Federal de São Carlos, 2017-01-18)
Gomes, Leonardo Fernandes
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Spinelli, José Eduardo
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https://lattes.cnpq.br/8882038118634925
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https://lattes.cnpq.br/6904883156193838
Al-Mg-Fe alloys are appointed as favorable ones in respect of the costs involved and all the required properties for successful vessel service. However, experimental inter-relations of solidification thermal parameters, microstructure and mechanical resistance are still undetermined. In the present research work, the dependences of tensile properties on the length scale of the dendritic morphology of ternary Al-1.2wt.%Mg-1.5wt.%Fe and Al-7.0wt.%Mg-1.5wt.%Fe alloys are examined. Transient heat flow conditions during solidification have been achieved by the use of a directional solidification system, thus permitting a comprehensive characterization of the dendritic microstructures to be performed. Thermo-Calc computations, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were carried out to give support to the extensive microstructural evaluation performed with both ternary Al-Mg-Fe alloys. Experimental growth relations of primary, λ1 and secondary, λ2 dendrite arm spacings with cooling rate (ṪL) and of tensile properties with λ2 are proposed. For both alloys examined, Hall-Petch type formulae show that the tensile strength increase with the decrease in λ2. The soundest strength-ductility balance is exhibited by the Al-7.0wt%Mg-1.5wt%Fe alloy specimen with very refined microstructure. This is shown to be due to a more homogeneous distribution of intermetallic particles in connection with solid solution strengthening propitiated by Mg. Functional experimental inter-relations of tensile properties with growth (VL) and cooling rates (ṪL) for both ternary Al-Mg-Fe alloys have also been derived.
Análise multicriterial da funcionalidade ecológica de modelos de restauração empregados em floresta estacional semidecidual
(Universidade Federal de São Carlos, 2017-01-19)
Galetti, Gustavo
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Silva, José Mauro Santana da
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https://lattes.cnpq.br/1206055452889306
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Piña-Rodrigues, Fatima Conceição Márquez
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https://lattes.cnpq.br/1475369713141675
The process of restoring degraded areas can be understood as the reconstruction of ecological processes, ensuring the continuation and development of the community in space and time. Given the complexity of this process, it is essential to develop indicators that will provide monitoring of the ecological integrity of these areas, serving as a tool for assessment of contained goals in projects and providing subsidies for decision-making in the management of these areas when required.This study aimed to conceptualize and analyze through literature, the concepts related to ecological restoration, stability and reliability in ecosystems, and key monitoring measures in forest restoration, emphasizing the ecological functions present in this process.
Incipiência da visualização de indicadores bibliométricos e altmétricos nos Repositórios Institucionais brasileiros
(Universidade Federal de São Carlos, 2017-01-21)
Reis, José Eduardo dos
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Spinola, Adriana Tahereh Pereira
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Amaral, Roniberto Morato do
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https://lattes.cnpq.br/3806982041285431
Os Repositórios Institucionais apresentam significativo potencial como fontes de informação para a elaboração dos estudos métricos, visando à compreensão das dinâmicas da atividade científica institucional. Contudo, sinalizam deficiências no tocante à externalização visual de seu vasto conteúdo científico na forma de indicadores bibliométricos e altmétricos. Neste contexto, o objetivo deste artigo foi investigar a capabilidade das iniciativas nacionais em Repositórios Institucionais de Acesso Aberto na utilização de indicadores bibliométricos e altmétricos, com base nos conceitos de visualização de informação. O método de pesquisa utilizado foi o estudo de caso exploratório, e a unidade de análise compreendeu 81 Repositórios Institucionais ativos nas Instituições de Ciência e Tecnologia brasileiras, identificados no Diretório de Repositórios de Acesso Aberto – OPENDOAR. Os resultados alcançados compreenderam a identificação e a análise da presença nos Repositórios Institucionais brasileiros dos indicadores bibliométricos e altmétricos e sua visualização gráfica. Observou-se que os indicadores bibliométricos apresentaram um índice maior de ocorrência na amostra analisada do que os indicadores altmétricos e a incipiência dos Repositórios Institucionais em disponibilizar os indicadores utilizando uma representação visual. Conclui-se que a discussão dos resultados alcançados pode contribuir para a compreensão da problemática em torno da utilização dos Repositórios Institucionais, como fontes de informação, para a elaboração e visualização de indicadores bibliométricos e altmétricos sobre as dinâmicas das atividades científicas desempenhadas pelas Instituições de Ciência e Tecnologia brasileiras.