18 resultados para UCINET
em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Ciência da Informação - FFC
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Ciência da Informação - FFC
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This paper analyses the scientific collaboration network formed by the Brazilian universities that investigate in dentistry area. The constructed network is based on the published documents in the Scopus (Elsevier) database covering a period of 10 (ten) years. It is used social network analysis as the best methodological approach to visualize the capacity for collaboration, dissemination and transmission of new knowledge among universities. Cohesion and density of the collaboration network is analyzed, as well as the centrality of the universities as key-actors and the occurrence of subgroups within the network. Data were analyzed using the software UCINET and NetDraw. The number of documents published by each university was used as an indicator of its scientific production.
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The most visible researchers in Knowledge Organization and Representation were identified, from the perspective of Brazilian researchers, based on cocitations from the papers presented in the last five meetings of the Encontros Nacionais de Pesquisa of the Associação Nacional de Pesquisa e Pós- Graduação em Ciência da Informação (ENANCIBs) from 2003 to 2008. First, the total number of references was identified, a total of 134 articles. Second, a citation analysis was conducted, being considered the most cited authors those who received 12 citations or more, which resulted in 31 most cited authors. Third, the Pajek software was used for the construction of the co-citation network and, thereafter, some indicators were calculated with the Ucinet software, which describe the structure and cohesion of the generated network, and, particularly, its density, and its degree of centrality, betweenness and proximity. The high cohesion of the network and the compliance between the most co-cited authors and the calculated indicators were verified.
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This piece of research aims at analyzing the absolute and relative co-citation indicators, especially Salton’s Cosine and comparing the contribution of these indicators to the understanding of a domain, applying them to the universe of "Metric Studies" at the BRAPCI base. It also aims at presenting the co-citation network generated from the absolute frequencies and highlighting the groupings of co-cited authors, depending on the relative values, integrating and explaining the information from the two indexes. The domain analysis, by means of its 11 approaches, including “Bibliometric Studies”, focuses on the science characterization and evaluation, in that it allows us to identify and to analyze the conditions under which the scientific knowledge is constructed and socialized. In these studies, the contribution of citation and co-citation analysis is highlighted. Of the total of 147 articles retrieved at BRAPCI base, the authors cited in at least 11 articles, in a total of 38 researchers, were selected. The 38 x 38 symmetric matrix with the absolute frequencies of co-citation and the matrix with the relative values of Salton’s Cosine were generated. The co-citation network with absolute frequency values were constructed, through Ucinet software. Cluster analysis of data with relative values wer performed, using the SPSS software. Significant differences between the absolute and relative indexes, with some high absolute values of co-citation were observed; when considered in relation to the presence of each author, their significance is decreased. As to the generated network, seven groups were determined, in which only one is established for close themes and comes from co-citations in the original sense of the term. Five groups present closeness in absolute and relative indicators. It can be concluded about the importance of the studies of authors' co-citation analysis, which associate the two indexes, absolute and relative, in order to visualize and understand the underlying structures of a scientific domain.
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This study aimed to identify the post-graduation programs in Speech Pathology in Brazil, present the production of professors of these programs in the aspects of documentary typologies and present the evolution of this production up to year 2011, delineate the collaborative networks between professors and between institutions, as well as to present the indicators of networks. By accessing the Capes website, eight post-graduation programs were found, revealing a list with a total of 118 professors in Brazil. Data were extracted from the Lattes Platform using the ScriptLattes. The graphs were created in Excel, the networks were traced using the software Ucinet and the density and centrality indicators were calculated. It was observed that most courses are located in the South and Southeast regions of the country and, even though this is a recent field, it presents a significant collaborative network.
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This research aims at verifying the authors who have given basis to the brazilian researches internationally inserted in the area of Bibliometrics and Scientometrics through the analysis of citation and co-citation of the brazilian articles published in the journal Scientometrics. We used the Scopus data base, with the terms Scientometrics in source title and Brasil or Brazil in affiliation country. We found 53 articles, with 741 references and 19 authors cited 3 or more times. In general, the researchers come from the biologic and health areas. Using the Ucinet software, we build the co-citation network and calculated its indicators. We calculated the co-citation normalized index. The density and average of normalized degree centrality were 65,5%. We concluded the research highlighting the significant presence of brazilians (32%) and the dialogicity occurring between cited Brazilians and foreigners within a balance, where brazilians already dialog with renowned international researchers of the Bibliometrics and Scientometrics area.
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This research aims at analyzing the researchers with major insertion and impact within the GT7 ENANCIB community, through an analysis study of citation and co-citation from 2003 to 2010. We propose to highlight the researchers cited in a greater number of papers, as well as the number of citations received. Also, to describe the co-citation network intending to analyze the interlocution network built by the writers towards the cited ones and calculate the indicators of density and centrality of the network. As for the theoretical-methodological basis, we used the Domain Analysis (D.A.), seen as the reflexion of a discourse community. Among the 11 approaches about D.A, the bibliometric studies stand out. Data from the 124 researches presented in the period of this study showed 1446 cited researches for a total of 2307 citations. From the total number of cited researchers in a greater number of papers, 33 were considered authors of major impact and visibility, being cited in at least 8 papers, thus getting at least 8 citations. The software Ucinet was used to map and visualize the net of interlocution established by the citing papers. As for the results, we could notice that, from the total of 33 researchers, 23 are Brazilian, 20 take part in Post-Graduation Programs and 11 are granted CNPq scholarships of productivity. Furthermore, we highlighted the most cited themes and analyzed the relationship involving the number of citations according to the number of papers in which the researcher was cited and the number of researches cited from each researcher. Regarding the network structure, we could observe that the authors form a single component, indicating that the group of researchers co-cited reveals proximity and theoretical, conceptual and methodological articulations. We concluded that the citing community adopts ordinary theoretical schools; moreover, we might characterize the core of the known researchers as a foundation for the knowledge of the GT7 theme.
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The aim of the present research is to analyse Ancib’s scientific production in the workgroup GT7 named Production and Communication of Information in ST&I, between the years of 2003 and 2009, through bibliometric indicators, from which it is possible to indicate what is more important or significant within a scientific field or context, so as to therefore analyse trends, existing relations or processes. The bibliometric studies are an approach method for the analysis of science behaviour in a given field. More specifically, by means of production and connection indicators, it aims at revealing and portraying the most productive authors, the kind of authorship present in this group, the most recurrent themes, most productive institutions, and the collaborative network determined by the institutional coauthorships and their indicators, so as to map and visualize the main researchers and institutions of the present GT, within the period of time in question. The research procedure derived from studying the 94 research project results presented in the period, where the paper reference, summary and corresponding key words can be found. Analysis concerning the most productive authors, most recurrent themes, kinds of authorship and most productive institutions have been carried out from the variables under review. The collaborative network between the institutions was built using the Pajek software, and, with the help of the Ucinet software, indicators of degree centrality, betweeness centrality, and closeness centrality have been reached, besides the calculation of density. The results point to 11 researchers and 9 institutions as the most productive ones. The collaborative institutional network was shown to be fragile, presenting low density, and in general the participating institutions have presented low centrality indexes. As a conclusion, it has been observed that the themes focus, in general, on bibliometric analysis and their indicators, using regional and national data as their universe.
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This paper analyzed and mapped social networks among cassava farmers in São Paulo, gathered in search of information regarding production and marketing. A descriptive research, using semi-structured questionnaires, in Tupa and Assis regions, was conducted. UCINET software assisted the analysis of interactions within networks. The results indicate that Tupa network is diffuse and there is little interaction with technology transfer institutions. In Assis, the network is cohesive with greater technological diffusion.
Produção científica em organização do conhecimento: uma análise de domínio via cocitações de autores
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Agronegócio e Desenvolvimento - Tupã
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Pós-graduação em Ciência da Informação - FFC