1,723,347 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
The interaction trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ with artificial radicals
No full textИзучено взаимодействие транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ с искусственными радикалами: 1,3,5-трифенилвердазилом, гальвиноксилом и дифенилпикрилгидразилом. Показано, что транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ способствует разрушению свободных радикалов за счет δ* компоненты четверной связи рений–рений, но в результате реакции в комплексе дирения(III) восстанавливается эта связь, поэтому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ может выступать как антирадикальный агент многократного действия.Вивчено взаємодію транс-Re2(HOC10H14-COO)2Cl4 зі штучними радикалами — 1,3,5-трифенілвердазилом, гальвіноксилом та дифенілпікрилгідразилом. Показано, що транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ здатен руйнувати вільні радикали за рахунок δ*-компоненти четверного зв’язку реній—реній, але внаслідок реакції у комплексі диренію(ІІІ) поновлюється цей зв’язок, тому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ може виступати антирадикальним агентом багаторазової дії.The interaction between trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ and artificial radicals: 1,3,5-triphenylverdazyl, galvinoxyl, diphenylpicrylhydrazyl was investigated. It was shown that the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ were able to be degradation of the free radicals due to quadruple rhenium—rhenium bond existence but in complex of dirhenium(III) this bond restore as a result of reaction, and so the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ is antiradical agent of repeat effect
The interaction trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ with artificial radicals
No full textИзучено взаимодействие транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ с искусственными радикалами: 1,3,5-трифенилвердазилом, гальвиноксилом и дифенилпикрилгидразилом. Показано, что транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ способствует разрушению свободных радикалов за счет δ* компоненты четверной связи рений–рений, но в результате реакции в комплексе дирения(III) восстанавливается эта связь, поэтому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ может выступать как антирадикальный агент многократного действия.Вивчено взаємодію транс-Re2(HOC10H14-COO)2Cl4 зі штучними радикалами — 1,3,5-трифенілвердазилом, гальвіноксилом та дифенілпікрилгідразилом. Показано, що транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ здатен руйнувати вільні радикали за рахунок δ*-компоненти четверного зв’язку реній—реній, але внаслідок реакції у комплексі диренію(ІІІ) поновлюється цей зв’язок, тому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ може виступати антирадикальним агентом багаторазової дії.The interaction between trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ and artificial radicals: 1,3,5-triphenylverdazyl, galvinoxyl, diphenylpicrylhydrazyl was investigated. It was shown that the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ were able to be degradation of the free radicals due to quadruple rhenium—rhenium bond existence but in complex of dirhenium(III) this bond restore as a result of reaction, and so the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ is antiradical agent of repeat effect
The interaction trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ with artificial radicals
Get PDFИзучено взаимодействие транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ с искусственными радикалами: 1,3,5-трифенилвердазилом, гальвиноксилом и дифенилпикрилгидразилом. Показано, что транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ способствует разрушению свободных радикалов за счет δ* компоненты четверной связи рений–рений, но в результате реакции в комплексе дирения(III) восстанавливается эта связь, поэтому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ может выступать как антирадикальный агент многократного действия.Вивчено взаємодію транс-Re2(HOC10H14-COO)2Cl4 зі штучними радикалами — 1,3,5-трифенілвердазилом, гальвіноксилом та дифенілпікрилгідразилом. Показано, що транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ здатен руйнувати вільні радикали за рахунок δ*-компоненти четверного зв’язку реній—реній, але внаслідок реакції у комплексі диренію(ІІІ) поновлюється цей зв’язок, тому транс-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ може виступати антирадикальним агентом багаторазової дії.The interaction between trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ and artificial radicals: 1,3,5-triphenylverdazyl, galvinoxyl, diphenylpicrylhydrazyl was investigated. It was shown that the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ were able to be degradation of the free radicals due to quadruple rhenium—rhenium bond existence but in complex of dirhenium(III) this bond restore as a result of reaction, and so the trans-Re₂(HO-C₁₀H₁₄-COO)₂Cl₄ is antiradical agent of repeat effect
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
Oligonychus litchii is an important agricultural pest in Taiwan (Acar: Tetranychidae)
No full textOligonychus litchii was first reported in 1989 by Lo and Ho. The known host
plants of this mite have rapidly increased to 34 plants in 17 families, including fruit
trees, ornamental plants, and some wild trees. It has become the key mite pest of
guava, litchi, longyan, loquat, and wax apple. In the opinion of the author, the
importance of this spider mite to agriculture in Taiwan is second only to Tetanychus
kanzawai Kishda, T. urticae Koch, and Panonychus citri (McGregor)
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