1,720,994 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
Selectivity of diamond and square mesh beam trawl cod ends for Parapenaeus longirostris (Lucas, 1846) (Decapoda, Penaeidae) in the Sea of Marmara
No full textIn this study, the effects of an increase in diamond mesh size from 24 to 28 and 32 mm, and changing mesh shape from diamond to square mesh on size selectivity for the deep-water rose shrimp, Parapenaeus longirostris were investigated. Fishing trials were carried out on commercial beam trawlers in the various fishing areas of the Sea of Marmara in two periods, between 28 August and 8 September 2001, and 29 April and 9 May 2002. Data were collected by twin trawl and analysed by means of a logistic equation with the Maximum Likelihood Method of the SELECT model. The 50% retention length (L-50) Of P longirostris increased consistently with diamond mesh sizes from 24 to 28 and 32 mm, and 28 mm square mesh gave a higher L-50 value than diamond at the same mesh size. The 32 mm diamond mesh size showed relatively better selectivity (L-50 = 104.1 mm) than the other cod ends, agreeing better with the Length at First Maturity (LFM) of 97 mm total length. The use of cod ends of 24 and 28 turn mesh size should be avoided in order to avoid a catch consisting mainly of small individuals. Such an increase in mesh size on beam trawl nets would contribute to reducing the amount of undersized P. longirostris in this fishery
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
The occurrence of xanthochroism in the thinlip grey mullet, Chelon ramada (Teleostei: Mugilidae), from the Aegean Sea
No full textIn this study, the first case of aberrant coloration, namely xanthochroism or xanthism, in the thinlip grey mullet, Chelon ramada (Teleostei: Mugilidae), was reported. The specimen was caught by a purse seiner in November 2019, in Izmir Bay, in the Aegean Sea, and was a female, with mature ovaries, which indicated that it had been in spawning migration or activity on the sampling date.TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [118O317]This specimen was caught during a field study for TUBITAK, under project number 118O317. The authors would like to thank Suleyman Canbaz and Arif Yalili, the skipper of the purse seiner AFALA and the executive chief of DALKO Fisheries Cooperative, respectively. We also would like to express our sincere appreciation to Aylin Ulman for her assistance in editing and checking of the manuscript language
An analysis of historical landing data of some pelagic species caught by purse seines in the Aegean Sea
No full textThe fishing activity with purse seines in the Aegean Sea accounts for almost half of the pelagic fish excluding anchovy (Engraulis encrasicolus Linnaeus, 1758) in Turkey. In this study, we aimed to analyse the catch amounts of some important pelagic species caught by Aegean purse seiners between 1973 and 2019. While mid-1990s are the most captured years for the European pilchard (Sardina pilchardus Walbaum, 1792) in Aegean Sea and also Turkish Seas, this amount has decreased at the level of 10000 mt in the mid-2000s and remained similar amounts up to now. Though European pilchard was the most caught species in the Aegean until 2011, this has changed in favour of anchovy in the last decade. Recently, almost all pelagic species such as mackerel (Scomber scombrus Linnaeus, 1758), chub mackerel (Scomber japonicus Houttuyn, 1782) and bogue (Boops boops Linnaeus, 1758) have been caught from the Aegean Sea in Turkey. In the study, the production of these species in the historical period was tried to be associated with the regulations implemented with circulars and notifications, and the problems preventing the sustainable use of these species that were caught by purse seiners were determined and solutions were proposed for the future
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