1,720,971 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Competitiveness of the Brazilian wood board industry in the world market 1998 to 2002
No full textO presente trabalho teve como objetivo principal caracterizar a estrutura do mercado internacional de painéis de madeira e analisar o desempenho do Brasil neste mercado. Tendo como objetivos específicos caracterizar a estrutura do mercado internacional de chapa de fibra de madeira, compensado e aglomerado quanto às exportações para o período de 1998 a 2002 e decompor o desempenho brasileiro e dos principais participantes do mercado internacional nas exportações de chapa de fibra de madeira, compensado e aglomerado em efeito destino, crescimento de mercado e competitividade em dois períodos 1998 a 2000 e 2000 a 2002. A estrutura de mercado foi analisada através do Coeficiente de Gini que permitiu verificar a desigualdade do mercado internacional enquanto o desempenho das nações exportadoras foi decomposto através do Modelo Constant Market Shere . De acordo com as análises desenvolvidas concluiu-se que a estrutura do mercado internacional de painéis foi caracterizada pela concentração e desigualdade na participação de mercado entre as nações, o que favoreceu o uso de práticas anticompetitivas e que os tratados comerciais e políticos entre as nações exerceram forte influência nos resultados do comércio internacional de painéis, reduzindo os benefícios de vantagens comparativas e do esforço estratégico da indústria de painéis reconstituídos nacional. Os aspectos endógenos desfavoreceram as exportações brasileiras, a exceção do compensado no período de 1998 a 2000, embora a magnitude destes efeitos tenha diminuído de forma significativa no período analisado. A hegemonia canadense no mercado internacional de aglomerado exerceu forte influência nos resultados gerais do mercado deste produto. O Brasil mostrou-se competitivo no período 1998 a 2000, no mercado internacional de compensado e no período 2000 a 2002 no mercado de chapa de fibra.The objective of this work was to characterize the structure of the world wood market and to analyze the Brazilian export performance. The specific objectives were to characterize the structure of the world market of fiberboard, plywood and agglomerate according to the exports for the period 1998-2002 and to decompose the performances of Brazil and the main participants in this market into destination effect, market growth and competitiveness in two periods, 1998-
2000 and 2000-2002. The market structure was analyzed by the Gini s Coefficient, with which it was possible to verify the inequality of the world market, whereas the performance of the exporter nations was decomposed by the Constant Market Shere Model. The analyses allowed the conclusion that the structure of the fiberboard world market was characterized by concentration and inequality of the market share between nations, favoring the use of anticompetitive practices, and that the political and trade agreements between nations exerted strong influence on the results of the global board trade, reducing the benefits of comparative advantages and the strategic effort of the national industry of reconstituted boards. Endogenous aspects made the Brazilian exports less effective, with the exception of plywood in the period 1998-2000, although the magnitude of these effects has decreased significantly in the period analyzed. The Canadian hegemony in the international agglomerate market exerted considerable influence on the general results of this product trade. Brazil showed competitiveness in the world plywood market in the period 1998-2000, and in the fiberboard market in 2000-2002
Risk-return and demand elasticity of sawn wood and forest management cost in Amazon
No full textEste trabalho teve como objetivo principal contribuir para a gestão de manejo de mata nativa na região da Amazônia Oriental, colaborando para a visualização de aspectos econômicos financeiros. Caracterizou-se a relação risco-retorno da madeira serrada oriunda de diferentes espécies florestais nativas da região amazônica, com o objetivo específico de determinar a relação risco-retorno da madeira serrada de Ipê, Jatobá, Maçaranduba, Angelim Pedra, Angelim Vermelho e Cumaru observada de 2003 a 2007. Admitiu-se a TGC dos preços do m3 das pranchas de cada espécie como estimativa de retorno e o coeficiente de variação como indicativo do risco. Concluiu-se que as mesmas flutuam de forma relativamente semelhante e que o Jatobá destacou-se em termos de atratividade, considerando todo o período, enquanto as demais espécies apresentaram uma relação coerente entre si de maiores retornos acompanhados de maiores riscos. O Angelim Vermelho e a Maçaranduba destacaram-se pela atratividade numa perspectiva anual. Estimou-se a elasticidade da demanda por madeira serrada no Brasil. Buscando-se especificamente a elasticidade preço do m3 de madeira serrada, a elasticidade preço cruzada do m3 de painéis de madeira e a elasticidade renda do PIB da nação. Fez-se uso de um modelo log-log com correção através de esquema de média móvel (MA(1)), ajustado para o período de 1971 a 2006 que se mostrou estável e com níveis de significância satisfatórios. Observou-se que a demanda de madeira serrada é inelástica em relação a preço e elástica em relação à renda. Estimou-se o custo do manejo florestal sustentável na região amazônica. Através do rendimento observado das atividades de manejo na região e do valor atual dos recursos envolvidos. Foram estimados os custos fixos e variáveis, para cada atividade do manejo florestal. Dessa forma, notou-se que o transporte representa o principal componente do custo médio do m3 de madeira extraída, o qual reduz à medida que a área da UPA (Unidade de Produção Anual) aumenta. O impacto da alteração da produtividade supera o exercido pela variação na intensidade de corte, seja no sentido de aumento ou redução dos custos.This work had as a main objective to contribute for the native forest management in the Amazonian Oriental area, collaborating for the visualization of financial economical aspects. The risk-return relationship of sawn wood from different forest native species of the Amazonian area was characterized, with the specific objective to determinate the riskreturn relationship of the sawn wood of Ipê, Jatobá, Maçaranduba, Angelim Pedra, Angelim Vermelho and Cumaru, observed from 2003 to 2007. TGC of the prices of the m3 of boards of each species was admitted as return estimative and the variation coefficient as indicative of the risk. It was concluded that they float in a relatively similar way and that Jatobá stood out in attractiveness terms, considering the whole period, while the other species presented a coherent relationship among themselves of higher returns associated with higher risks. Angelim Vermelho and Maçaranduba stood out for the attractiveness in an annual perspective. It was estimated the demand elasticity for sawn wood in Brazil. It aimed specifically the elasticity price of the m3 of sawn wood, the elasticity price of the m3 of wood panels and the income elasticity GDP of the nation. It was used a log-log model, with correction through outline of the mobile average (MA(1)), adjusted for the period from 1971 to 2006, which showed to be stable, with satisfactory significance levels. It was observed that the sawn wood demand is inelastic in relation to price and elastic in relation to income. It was delineated as objective to estimate the costs of the sustainable forest management in the Amazonian area. Through the observed revenue of the management activities in the area and the current value of the involved resources, it was estimate the fixed and variable costs, for each activity of the forest management. It was noticed that transportation represents the principal component of the average cost of the m3 of extracted wood, which reduces as the area of the APU (Annual Production Unit) increases. The impact of the alteration of the productivity overcomes the exercised by the variation in the cut intensity, both in the increase or reduction of costs
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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