1,721,506 research outputs found
Scientific Visualization (Dagstuhl Seminar 14231)
No full textThis report documents the program and the outcomes of Dagstuhl Seminar 14231 "Scientific Visualization". It includes a discussion of the motivation and overall organization, an abstract from each of the participants, and a report from each of the working groups
Assessment of the results of the pendulum friction tester (EN 14231) for natural building stones used as floor-coverings
Full text linkThe main scope and parameter in choosing stone materials for floorings are unquestionably safety and slip resistance. The standard "EN 14231" is one of those developed for natural stones. The device used for the tests of this standard, "the pendulum coefficient friction tester", determines the slip resistance value of floorings in angle. Standards and their testers have constantly being developed. When this point of view is considered, EN 14231 has not yet been criticized. In this study, EN 14231 and the results obtained by the pendulum tester were for the first time analysed in terms of characteristics expected from a standard. For experimental studies, marble, limestone, travertine and granite samples currently in use as natural building materials were used. For each type of stone, four well-known and widely used stones that had surface roughness less than 1 mm were chosen. In this respect, 384 pendulum tests were conducted on 192 samples and more than 2200 angles were read from F scale. Depending on these readings, the dry slip resistance value-wet slip resistance value (DSRV-WSRV) relationships of marbles, limestone, travertine, and granites were investigated. Except travertine, DSRV-surface roughness and WSRV- surface roughness relationships of the samples were investigated. In addition, DSRV- cavity surface area and WSRV- cavity surface area relationships of travertine samples were investigated. After the evaluation of the test results, it was observed that, in general, higher correlations were obtained from wet samples compared to dry ones. The highest correlations were obtained from wet limestone samples. On the other hand, the lowest correlations were determined on the marble samples. Besides, petrographic characteristics and the physical characteristics of the stones such as, surface roughness and surface cavities were not recorded to have had any determinative effects on the results of the pendulum tester. According to the data obtained in this study, EN 14231 and the pendulum tester were seen to have fallen short in distinguishing both different types of natural stones and different groups of the same type of stone. For this reason, new researches should be made on EN 14231 and the pendulum tester device and both should be developed further. In the light of these results, EN 14231 was concluded to have been unsatisfying in terms of the characteristics expected from a standard and its applicability for slip resistance tests of stone materials to be used in floorings. (C) 2013 Elsevier Ltd. All rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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