124 resultados para indicadores de citação
em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"
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Ps-graduao em Cincia da Informao - FFC
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This study aims to present, analyze and compare the results of applying three normalization procedures on the index of citations per document: normalized by the overall mean, median and the mean of the 10% most productive in the area, in the universe of Brazilian science in the 27 areas of knowledge presented by Scopus. From the data obtained on SCImago Journal & Country Rankings for the 27 areas, we calculated Ma, Md and Ma10% of the number of citations per document for the set of countries. Next, for each area, we calculated the normalized index of Brazil by the overall mean ( ), median ( ) and the mean of the 10% most productive countries ( ). It was concluded that normalization procedures present results with fewer biases and are more representative of the actual performance of the area in relation to its peers when comparing different areas of knowledge. This is the major contribution of normalized indicators pointed out by this research.
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This paper aims at contributing with research about Information Science through analysis of Bibliometric indicators applied to Dentistry in Brazil, comparing the impact of such production with the ones from major countries in that field. The analyzed indicators are the following: total number of citations, self-citations, average of citations received a year and index h. Within the procedures, we outlined, in the Scimago Journal Rank (SJR) the group of producing countries in the field of Dentistry from 1996 to 2009. The results show that Brazil is the only country in Latin America which is among those of major impact in Dentistry. We highlight the role of the Bibliometric indicators as methodological contribution to the research while pointing out the main performers in the knowledge field.
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This research aims at analyzing the indicators of impact and relevance - total of published articles, average of citations, total number of citations and index h of the most productive researchers in the Metric Studies field, within periods of the Scopus base by means of a correlation study, determining the best equation of regression of index h due to the total of citations, as well as to all other indicators under analysis. As research procedure, we used the search terms bibliometr* OR scientometr* OR infometr* OR webometr* OR informetr* OR webmemetr* OR paentometr*, obtaining 36 researchers as the most productive ones. For each indicator, the following descriptive statistics were calculated: maximum, minimum, average, standard deviation and coefficient of variation. The coefficient of correlation of Pearson was calculated and adjusted to the equation of regression of index h due to the total of citations. The equation of multiple regression was identified, from index h due to the other indicators. Concluding, we highlight the need for a matching of such indicators to broadly describe a researcher's multifaceted profile, seeing the complementarity of information provided by the indicators of productivity and impact, from distinctive nature.
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This research aimed to study the international scientific collaboration, through co-authorship, and the impact of full papers published in journals Qualis A1 and A2 of Graduate Programs in Animal Science of excellence (2007-2009). Through the indicators of production of graduate evaluation from CAPES, the research gathered the scientific production of three graduate programs, adding up to 125 articles. The citations received were gathered from the SCOPUS database and the impact of journals from the SCImago Journal & Country Rank. In order to investigate the correlation among the indicators analyzed, Pearsons linear correlation coefficients were calculated. It was observed that the Impact Factor (IF) of the journal may influence the number of citations and that there is a weak trend for association of IFs with the number of coauthor countries. It was not observed a statistically significant correlation between the number of collaborating countries and citations received by the article.
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Ps-graduao em Cincia da Informao - FFC
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Introduction: This paper considers that information science (IS) literature covers a diversity of thematics with low emphasis on researches about conducting research. The study analyzes the scientific production of authors who investigate about research methodology in the information science (IS) literature, and the references used to lay the foundation of the methodological issues regarding the area. It discusses the methodological and epistemological positions of the leading researchers highlighted as the most productive investigators on the subject in the country. Method: The research adopts the content analysis coupled with metric studies to contextualize the indicators related to productivity, to the types of authorship and citation analysis. The bibliographic coupling method is considered an analysis mode which analyzes concomitant citations. It develops a theoretical framework about the importance of scientific production analysis in different knowledge fields. The study investigates, from a theoretical perspective, the concepts about research methodology and the complementarity between methodology and epistemology in conducting research. Results: The results of the analysis showed that the production of the highlighted authors presents the methodology as a thematic focus to be applied to IS contexts, as well as a research object in the field. The prominent productivity of the authors is justified especially by deepening the meta studies about the ways to conduct research in IS. This study also identifies a trend to single-authored studies about the theme. Conclusions: The research considers that meta studies and applied and methodological studies are important to recognize a consistent theoretical and practical core in the IS area. Regarding the epistemological influences identified by the citation analysis, the study observes that the critical rationalist epistemology and the social and political epistemology are highlighted in the construction of the theoretical framework of the most productive authors.
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
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O objetivo deste trabalho foi avaliar os indicadores fisiolgicos da interao entre deficit hdrico e acidez do solo em plantas jovens de cana-de-acar. As plantas foram submetidas a trs tratamentos de disponibilidade hdrica, medidos em percentagem de capacidade de campo (CC) - sem estresse (70% CC), estresse moderado (55% CC) e estresse severo (40% CC); e trs tratamentos de acidez no solo, medidos em termos de saturao por bases (V) - baixa acidez (V = 55%), mdia acidez (V = 33%) e alta acidez (V = 23%). O experimento foi realizado em casa de vegetao a 29,74,3C e 7510% UR. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 3x3, com quatro repeties. Aps 60 dias, foram determinados os teores de solutos compatveis - trealose, glicina betana e prolina - na folha diagnstico e o crescimento inicial da parte area. Os solutos compatveis trealose, glicina betana e prolina so indicadores do efeito da interao dos estresses hdrico e cido no solo. O acmulo dos solutos compatveis nos tecidos foliares das plantas no capaz de impedir a reduo na produo de matria seca da cana-de-acar, resultante do agravamento nas condies de disponibilidade hdrica e de acidez no solo.
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The present study aimed to compare the main zootechnical and economic indicators of farming tilapia in superintensive system developed in two different net cages dimensions: 6 and 18 m(3). Were used 12,960 juveniles male reversed Nile tilapia (Oreochromis niloticus), strain supreme, with an initial average weight of 32.0 g (+/- 0.85) for 6 m(3) net cages and 88.5 g (+/- 0.96) for 18 m(3) net cages. The fish were fed three times a day with commercial extruded ration, crude protein levels from 40 to 32%, particle size from 2 to 8 mm and daily feeding rate starting with 8% of live weight (LW), decreasing up to 1% LW. It was conclued that, although no statistical difference in most indicators zootechnical (P>0.05), the production of tilapias in bigger net cages resulted in lower average total cost and higher rentability per kg of fish produced, 34.4% higher, resulting in better profitability.
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Este trabalho teve como objetivo identificar zonas diferenciadas de manejo por meio de indicadores de fertilidade em Latossolos cultivados com cana-de-acar, utilizando-se a tcnica de krigagem indicatriz, com vistas em buscar um aprimoramento na utilizao de tcnicas de agricultura de preciso. O estudo foi realizado em uma rea de 90 ha pertencente a uma rea maior de 1.900 ha, localizada em Jaboticabal, Estado de So Paulo, Brasil (21 ° 15 ' S e 48 ° 18 ' W). Na rea experimental, foi estabelecida uma malha de amostragem regular de 50 m, com 420 pontos. em cada ponto, coletou-se uma amostra de solo, na qual foram determinados os teores de matria orgnica, P, K disponveis e o valor de V. Os dados obtidos para estas caractersticas do solo, assim como as combinaes entre elas, foram codificados em valores indicadores 0 ou 1, conforme as variveis apresentassem valores acima ou abaixo do valor de corte estabelecido, escolhido para cada varivel, respectivamente. Os resultados propiciaram a confeco de mapas de probabilidade de cada varivel (individual e combinada), o que possibilitou identificar regies com diferentes nveis de fertilidade do solo na rea experimental.
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Foram submetidas s contagens de colifagos, coliformes totais, coliformes fecais e de estreptococos fecais, 104 amostras de gua colhidas de 8 poos rasos localizados na rea urbana do Municpio de Jaboticabal, SP, Brasil, com a finalidade de avaliar as condies higinico-sanitrias e de verificar as correlaes existentes entre o nmero de colifagos e o de bactrias indicadoras de poluio fecal. Os resultados obtidos evidenciaram a ocorrncia de 96 (92,3%) amostras fora dos padres bacteriolgicos de potabilidade estabelecidos pelo Ministrio da Sade, monstrando ser precrias as condies higinico-sanitrias das guas analisadas. Os achados evidenciaram a inexistncia de correlao entre o nmero de colifagos e os nmeros de bactrias indicadoras de poluio fecal.
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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
Efeito da seleo para peso ps-desmama sobre indicadores da eficincia produtiva de vacas da raa Nelore
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O objetivo deste estudo foi avaliar indicadores da eficincia produtiva de vacas Nelore selecionadas para peso ps-desmama, enfocados nas relaes peso bezerro e peso da vaca, nos rebanhos controle (NeC), no-selecionados para peso ps-desmama, seleo (NeS) e tradicional (NeT). As anlises envolveram 3929 e 3906 pesos dos bezerros aos 120 (P120) e 210 (P210) dias de idade, respectivamente. Os pesos das vacas quelas idades tambm foram considerados, obtendo-se 3824 (PV120) e 3777 (PV210) registros, respectivamente, para 120 e 210 dias. A anlise incluiu 183, 375 e 554 vacas dos rebanhos NeC, NeS e NeT, respectivamente. Para as anlises utilizou-se o procedimento GLM/SAS, em modelos que incluram os efeitos fixos de rebanho, ano e ms de nascimento, sexo do bezerro, idade da vaca ao parto e as interaes rebanho x ano de nascimento e ano x ms de nascimento. Todos os efeitos foram significativos. Os resultados mostraram respostas correlacionadas positivas na seleo para peso ps-desmama nos pesos dos bezerros e, em menor magnitude, no peso das vacas. As relaes peso bezerro e peso da vaca apresentaram valores mdios ajustados de 249,02,1; 253,71,6; e 255,81,2 g/kg para R120 e 362,92,8; 368,52,1; e 374,61,7 para NeC, NeS e NeT em R210, respectivamente, indicando que, nas duas idades, os rebanhos NeS e NeT produziram mais quilogramas de bezerro por quilogramas de vaca, quando comparados ao NeC.
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O objetivo deste trabalho foi comparar os indicadores internos, fibra em detergente neutro e fibra em detergente cido indigestveis, obtidos aps 144h de incubao in vitro e in situ (FDNiv; FDNis; FDAiv; FDAis) com o indicador externo, o xido crmico (Cr2O3), para estimativas da produo fecal, do fluxo duodenal de matria seca e matria orgnica em novilhos mestios (HxZ) confinados. Foram utilizadas dietas base de silagens de milho, de raspa e de casca de mandioca, e tambm de cana-de-acar ensilada com polpa ctrica peletizada. Os novilhos foram castrados e canulados no rmen e no duodeno. O perodo experimental teve 11 dias de adaptao s dietas e 8 dias de coleta. O delineamento experimental foi o quadrado latino (4x4), com quatro tratamentos, num arranjo em parcela subdividida, sendo as dietas estudadas nas parcelas, e os indicadores nas subparcelas. Os resultados obtidos em percentagem do peso vivo para a estimativa da produo fecal, utilizando-se os diferentes indicadores, mostraram que a FDAiv (0,88 %), a FDAis (0,85 %) e o Cr2O3 (0,99 %), embora com diferenas significativas, podem ser utilizados pelos resultados biologicamente consistentes. Para estimar o fluxo duodenal de matria seca e matria orgnica, foram utilizados os valores de produo fecal obtidos com a FDAiv. Os indicadores internos no apresentaram diferenas entre si para o fluxo duodenal de matria seca, com mdia de 3,29 kg/dia, porm o xido crmico superestimou o fluxo (4,95 kg/dia). Para o fluxo duodenal de matria orgnica no houve diferena entre os indicadores com mdia de 2,73 kg/dia.
