1,720,961 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
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
Aplicação de fontes de boro e zinco via foliar em culturas anuais
No full textA adubação foliar ainda apresenta muitos resultados inconclusivos, tanto no que concerne às concentrações, épocas de aplicação e produtos utilizados. O trabalho teve como objetivo comparar os efeitos da aplicação, via foliar, de diferentes fontes de fertilizantes foliares contendo B e/ou Zn, em culturas anuais, nos anos de 2006 e 2007. Os experimentos foram conduzidos na Fazenda Experimental da Universidade Estadual Paulista/UNESP – Campus de Ilha Solteira – SP, em um Latossolo Vermelho-escuro distroférrico, com 0,41 mg dm-3 de B e 0,60 mg dm-3 de Zn. O delineamento experimental adotado, para todas as culturas, foi o de blocos ao acaso sendo os tratamentos constituídos por quatro fontes de B e/ou quatro fontes de Zn, com quatro repetições, além da testemunha sem aplicação de fertilizantes via foliar. Os cultivares utilizados foram o IAC – Carioca, AG 5020, BRS MG-68 (Vencedora) e IAC – 370, para o feijão, milho, soja e trigo, respectivamente. Cada parcela constou de 5 m x 5 linhas, na cultura do feijão, do milho e da soja, e para a cultura do trigo cada parcela constou de 5 m x 10 linhas. Foram utilizadas quantidades de cada um dos produtos para que fossem aplicados 220 g e 500 g ha-1 de B e/ou de Zn, respectivamente, parceladas em duas aplicações, sendo a primeira aos 20 DAE e a segunda no momento do florescimento de cada cultura, exceto no milho que foi aplicado no estádio de 8 folhas. Foram avaliados os teores foliares de todos os nutrientes, com exceção do Cl e do Mo, xi os componentes de produção e a produtividade das culturas. A aplicação de boro e zinco via foliar aumentou os teores foliares desses elementos nas culturas estudadas; os tratamentos não promoveram efeitos significativos nos componentes de produção e na produtividade das culturas do feijão, milho, soja e trigo, exceto no número de vagens...The leaf fertilization is still a practice little studied on concerns to the concentrations, application times and used products. The study had as objective to investigate the effects of the application, through leaf, of different leaf fertilizers containing B or Zn, in the crops of common bean, corn, soybean and wheat, in 2006 and 2007. The experiments were conducted at Experimental Station of Faculdade de Engenharia /UNESP – Ilha Solteira Campus - SP, in a Haplustox with 0.41 mg dm-3 of B and 0.60 mg dm-3 of Zn. A randomized block design with treatments constituted by four sources of B and four sources of Zn, besides a control, in four repetitions, was used. They were tested IAC – Carioca, AG 5020, BRS MG-68 (Vencedora) and IAC - 370, for common bean, corn, soybean and wheat, respectively. Each plot consisted of 5m x 5 lines, to common bean, corn and soybean and to wheat each plot consisted of 5 m x 10 lines. It was applied 220 g and 500 g ha-1 of B and of Zn, respectively, split in two applications, at 20 days after emergency the first application and the second one at flowering stadium to common bean, soybean and wheat. To corn it was applied at 8 leaf stadium. They were evaluated the leaf content to macro and micronutrient, except Cl and Mo; the production components and the productivity of the crops. The boron and zinc application through leaf increased B and Zn leaf content on common bean, corn, soybean and wheat; the treatments did not promote significant effects in the production xiii components and in productivity on crops studied; it would not recommended the application these fertilizers on crops studied.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
Aplicação de fertilizantes foliares em culturas anuais
No full textA adubação foliar ainda é uma prática pouco estudada, tanto no que concerne às concentrações, épocas de aplicação e produtos utilizados. O interesse pelo uso do fornecimento de nutrientes minerais através das partes aéreas da plantas cultivadas vem aumentando extraordinariamente, não só nos países mais adiantados do mundo, como também no Brasil, especialmente nos últimos anos. O trabalho teve como objetivo investigar os efeitos da aplicação, via foliar, de B e de Zn em culturas anuais (algodão, arroz, feijão, milho, soja e trigo). A importância do trabalho está no sentido de se obter respostas sobre a aplicação dos produtos atualmente recomendados para as devidas culturas sem o estudo experimental de sua eficiência ou de possíveis danos que possam provocar às culturas, e conseqüentemente auxiliar o agricultor na prática deste manejo. Foi utilizado o delineamento em blocos casualizados e os tratamentos se constituíram pela variação de fontes dos nutrientes boro e zinco aplicados via foliar. Foram avaliados o teor foliar dos macro e micronutrientes, com exceção do cloro e do molibdênio, os componentes de produção e a produtividade das culturas. De acordo com os resultados pode-se concluir que: (a) a aplicação de boro e zinco via foliar, nas culturas do feijão, trigo e algodão, não aumentaram os teores foliares desses elementos, (b) os teores de boro e zinco foliar, na cultura do arroz, foram aumentados quando da aplicação destes nutrientes, (c) a aplicação de zinco via foliar, aumentou o teor foliar desse nutriente nas culturas do milho e da soja, (d) os tratamentos não promoveram efeitos significativos nos componentes de produção e na produtividade das culturas, (e) não se recomendaria a aplicação foliar desses fertilizantes nas culturas estudadas.The leaf fertilization is still a not very studied practice, so much to concentrations, application times and used products. The interest for supplying nutrients through the leaf of cultivated plants comes increasing extraordinarily, not only in the advanced countries of the world, but also in Brazil, especially in last years. The work had as objective to investigate the effects of the application, through leaf, of nutrients in annual crops (cotton, rice, common bean, corn, soybean and wheat). The importance this study is to obtain response about the application of products recommended for those crops without experimental study of its efficiency or possible damages that can provoke to the crops, and consequently to help farmers in the practice of this management. The experimental design was blocks casualizados and the treatments were constituted by sources of boron and zinc applied through leaf. Were appraised the leaf content of macro and micronutrients, except for the chlorine and molybdenum, the production components and productivity of the crops. The results showed: (a) the B and Zn application, in common bean, wheat and cotton crops, did not increase the leaf content those elements, (b) B and zinc leaf content, on rice, were increased when of the application of these nutrients, (c) the leaf application of zinc increased the leaf content this nutrient on corn and soybean, (d) the treatments did not promote significant effects in production components and productivity of the crops, (e) would not be recommended the leaf application those fertilizers on crops studied.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP
Aplicação de fontes de boro e zinco via foliar em culturas anuais
No full textA adubação foliar ainda apresenta muitos resultados inconclusivos, tanto no que concerne às concentrações, épocas de aplicação e produtos utilizados. O trabalho teve como objetivo comparar os efeitos da aplicação, via foliar, de diferentes fontes de fertilizantes foliares contendo B e/ou Zn, em culturas anuais, nos anos de 2006 e 2007. Os experimentos foram conduzidos na Fazenda Experimental da Universidade Estadual Paulista/UNESP – Campus de Ilha Solteira – SP, em um Latossolo Vermelho-escuro distroférrico, com 0,41 mg dm-3 de B e 0,60 mg dm-3 de Zn. O delineamento experimental adotado, para todas as culturas, foi o de blocos ao acaso sendo os tratamentos constituídos por quatro fontes de B e/ou quatro fontes de Zn, com quatro repetições, além da testemunha sem aplicação de fertilizantes via foliar. Os cultivares utilizados foram o IAC – Carioca, AG 5020, BRS MG-68 (Vencedora) e IAC – 370, para o feijão, milho, soja e trigo, respectivamente. Cada parcela constou de 5 m x 5 linhas, na cultura do feijão, do milho e da soja, e para a cultura do trigo cada parcela constou de 5 m x 10 linhas. Foram utilizadas quantidades de cada um dos produtos para que fossem aplicados 220 g e 500 g ha-1 de B e/ou de Zn, respectivamente, parceladas em duas aplicações, sendo a primeira aos 20 DAE e a segunda no momento do florescimento de cada cultura, exceto no milho que foi aplicado no estádio de 8 folhas. Foram avaliados os teores foliares de todos os nutrientes, com exceção do Cl e do Mo, xi os componentes de produção e a produtividade das culturas. A aplicação de boro e zinco via foliar aumentou os teores foliares desses elementos nas culturas estudadas; os tratamentos não promoveram efeitos significativos nos componentes de produção e na produtividade das culturas do feijão, milho, soja e trigo, exceto no número de vagens...The leaf fertilization is still a practice little studied on concerns to the concentrations, application times and used products. The study had as objective to investigate the effects of the application, through leaf, of different leaf fertilizers containing B or Zn, in the crops of common bean, corn, soybean and wheat, in 2006 and 2007. The experiments were conducted at Experimental Station of Faculdade de Engenharia /UNESP – Ilha Solteira Campus - SP, in a Haplustox with 0.41 mg dm-3 of B and 0.60 mg dm-3 of Zn. A randomized block design with treatments constituted by four sources of B and four sources of Zn, besides a control, in four repetitions, was used. They were tested IAC – Carioca, AG 5020, BRS MG-68 (Vencedora) and IAC - 370, for common bean, corn, soybean and wheat, respectively. Each plot consisted of 5m x 5 lines, to common bean, corn and soybean and to wheat each plot consisted of 5 m x 10 lines. It was applied 220 g and 500 g ha-1 of B and of Zn, respectively, split in two applications, at 20 days after emergency the first application and the second one at flowering stadium to common bean, soybean and wheat. To corn it was applied at 8 leaf stadium. They were evaluated the leaf content to macro and micronutrient, except Cl and Mo; the production components and the productivity of the crops. The boron and zinc application through leaf increased B and Zn leaf content on common bean, corn, soybean and wheat; the treatments did not promote significant effects in the production xiii components and in productivity on crops studied; it would not recommended the application these fertilizers on crops studied.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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
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