1,720,977 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
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
Analysis of the B chromosomes undergoing root-specific elimination during the embryogenesis of Aegilops speltoides : [kumulative Dissertation]
No full textB-Chromosomen haben keinen signifikanten Einfluss auf die Entwicklung und die Fitness des Trägers. Deshalb werden sie auch als „nicht-funktional“ angesehen. In den meisten Fällen ist die Anzahl der B-Chromosomen pro Organismus stabil. In Aegilops speltoides ist die Anzahl der B-Chromosomen in allen überirdischen Organen konstant, während in den Wurzeln keine B-Chromosomen vorkommen. Der erste Teil der vorliegenden Arbeit beschäftigt sich mit der Aufklärung der Sequenzzusammensetzung der B-Chromosomen von Ae. speltoides mit besonderem Fokus auf repetitive Sequenzen. Zwei B-spezifische und zwei auf den B-Chromosomen stark angereicherte Repeats konnten nebe einem hohen Anteil an mitochondrialer und Chloroplasten-DNA in den B-Chromosomen von Ae. speltoides identifiziert werden. Der zweite Teil der Arbeit beschäftigt sich mit der wurzelspezifischen Eliminierung der B-Chromosomen in Ae. speltoides. Der Eliminierungsprozess unterliegt einer strengen Kontrolle und ist genetisch programmiert. Non-disjunction der B-Chromosomen Schwesterchromatiden resultiert unabhängig von der Zentromeraktivität in Mikrokerne. Diese Mikrokerne werden anschließend komplett eliminiert. Die vorliegende Arbeit ist der erste Beleg für eine programmierte Chromosomeneliminierung in Pflanzen.Supernumerary B chromosomes (Bs) do not affect significantly the development and fitness of an organism and are therefore considered as non-functional and without any essential genes. In most cases, the number of Bs is stable within individual organisms, but numerical instability of Bs may exist in a number of plant and animal species. In B chromosome-carrying Aegilops speltoides plants, Bs are constant in the aerial organs and totally absent in primary and adventitious roots. The study, firstly, addresses the sequence composition of the Ae. speltoides B chromosome with the focus on repetitive sequences. Two B-specific and two B-enriched repeats, as well as a high amount of mitochondrial and chloroplast DNA insertions were identified in Ae. speltoides Bs. The second part of the study addresses how the root-specific elimination of B chromosomes occurs in Ae. speltoides. The elimination process is strictly controlled and genetically programmed. Non-disjunction of B chromatid results in micronuclei undergoing elimination independently of centromere activity. The present work is the first report about programmed chromosome elimination in a plant species
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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