1,720,989 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
The effect of changes in equity index composition on stock price: The case of the S&P/ASX 20, 50, and MidCap 50
No full textThis paper is aimed at evaluating the index effect for the Australian blue-chip and midcap indices using changes in index composition from the S&P/ASX 20, 50 and MidCap 50. For the midcap index I find significant CAARs for the period prior to the announcement period which would signify that market participants anticipate the changes to index composition and possibly try to exploit the already еstablished in literature phenomenon that is the index effect. For exclusions from the S&P/ASX MidCap 50, I find significant negative price effect after the effective date which does not revert in the next 20 days. The imperfect substitutes hypothesis is used to explain the finding
Synthetic Studies Towards Analogues of Spirolaxine Methyl Ether
No full textH. pylori is a bacteria that infects a significant proportion of the human population. It is the primary agent responsible for gastric and duodenal ulcers and has been further linked with gastric cancer and mucosa-associated lymphoid tissue (MALT lymphoma). Eradication of H. pylori can cure these diseases; however the current therapies used are far from ideal. (+)-Spirolaxine methyl ether (15) exhibits potent activity against H. pylori and is therefore a promising drug candidate. The first enantioselective total synthesis of spirolaxine methyl ether (15) was achieved by Robinson and Brimble. This thesis reports the successful synthesis of eight analogues of spirolaxine methyl ether (15), with the aim of producing antibiotics with more pronounced activity than the parent natural product Specifically the goal is to obtain analogues where the length of the polymethylene carbon chain which links the spiroacetal and phthalide moieties is varied (Compounds 335-336) and at the same time replace the phthalide heterocycle with an indole (Compounds 337-339) and an oxindole (Compounds 340-342) ring systems. This strategy provides three sets of three analogues: one set with a longer polymethylene chain than the natural product and three different heterocycles (Compounds 336, 339, 342), a second set of three analogues with the same polymethylene chain length as in the natural product and the three different heterocycles (Compounds 338, 341) and finally a set of three compounds with a shorter polymethylene chain length than the natural product (Compounds 335, 337, 340) (Scheme 69). The information from the biological evaluation of these analogues of spirolaxine methyl ether (15) will be of considerable value to programs aimed at improving the anti-H. pylori profile of these compounds
Web-based solution for optimizing the make-to-order production planning in the corrugated fiberboard industry
No full textkoamabayili/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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