1,721,272 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
New molecular charge transfer salts of BEDT-TTF, bis(ethylenedithio) tetrathiafulvalene, with thiocyanato-complex anions: (BEDT-TTF)<sub>4</sub> Fe(NCS)<sub>6</sub>·CH<sub>2</sub>Cl<sub>2</sub> and (BEDT-TTF)<sub>2</sub> Cr(NCS)<sub>4</sub>(bipym)·0.15H<sub>2</sub>O
No full textTwo new charge transfer salts of BEDT-TTF, bis (ethylenedithio) tetrathiafulvalene, with thiocyanato-metal complex anions have been synthesized and characterized as (BEDT-TTF)4[Fe(NCS)6].CH2Cl2 and (BEDT-TTF)2[Cr(NCS)4 (bipym)]·0.15H2O, where bipym = 2,2 ' -bipyrimidine. The Fe salt, I, crystallizes in the P-l (No. 2) space group at 150 K with a = 10.629(1) Angstrom, b = 12.099(1) Angstrom, c = 16.062(2) Angstrom, alpha = 99.61(1)degrees, beta = 90.87(1)degrees, gamma = 112.92(1)degrees, and V = 1868.5(6) Angstrom (3). At 150 K th, C, salt, II, crystallizes in the P-1 (No. 2) space group with a = 9.243(2), b = 11.781(2), c = 22.925(5) Angstrom. alpha = 93.76(3), beta = 101.51(3), gamma = 105.45(3)degrees, V= 2339.0(8) Angstrom (3), and Z = 2. Both salts exhibit close S···S contacts between the anion and cation components and in II there is no pi -stacking between the bipym group and the BEDT-TTF molecules. Both salts are paramagnetic with C = 4.926 I and C = 1.819 II with small negative Weiss constants of -0.19 and -0.26, respectively. Therefore, the S S contacts alone do not promote correlated magnetic effects as seen in other thiocyanato salts that also contain pi -stacking. Each compound is a semiconductor and has two crystallographically independent BEDT-TTF molecules for which bond length analysis give charges of +0.9 ± 0.1/ +0.6 ± 0.1 for I and +0.3 ± 0.1/ +0.9 ± 0.1 for II
Case studies in web sustainability
No full textAt the moment organisations often make significant investments in producing Web-based material, often funded through public money, for example from JISC. But what happens when some of those organisations are closed or there is no longer any money or resources to host the site? We are seeing cuts in funding or changes in governmental policy, which is resulting in the closure of some of these organisations. What happens to those Web resources when the organisations are no longer in existence? Public money has often been used to develop these resources - from that perspective it would be a shame to lose them. Moreover, the resources might be needed or someone may actually want to take over the maintenance of the site at a later date. How do we make these sites more sustainable? Is there any way we can move sites to somewhere that is free to host the Web pages, and can be left there or modified when needed? JISC previously funded three projects to look at this area through a programme called Sustaining ‘at risk’ online resources [1]. One of these projects, which ran at The University of Northampton, looked into ‘rescuing’ one of the recently closed East Midlands Universities Association’s online resources. This resource, called East Midlands Knowledge Network (EMKN), lists many of the knowledge transfer activities of 10 of the East Midlands universities. The project looked at options on how to migrate the site to a free hosting option to make it make it more sustainable even when it is no longer available on the original host’s servers. This article looks at this work as a case study on Web sustainability and also included a case study of another project where Web sustainability was centra
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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