1,721,025 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
Antibacterial activity of Vibrio sp. strain OCN008, a bacterium isolated from the coral Porites compressa
No full textCorals of Hawaii are increasingly experiencing outbreaks of diseases. One such disease is Montipora White Syndrome (MWS), which is hypothesized to be caused by marine bacteria. This disease causes rapid tissue loss in Montipora capitata, one of the dominant scleractinian coral species of Kaneohe Bay, Oahu, Hawaii. Vibrio sp. strain OCN008 was isolated from Porites compressa, another common species of coral in Kaneohe Bay, and was shown to inhibit the growth of three putative pathogens isolated from the coral mucus of MWS-affected M. capitata. OCN008 exhibited inhibitory activity on agar plate tests, including soft-agar overlay assays, culture droptests, and supernatant droptests. Inhibitory activity was also observed through growth curves of these putative pathogens incubated in 50% conditioned liquid medium and 50% GASW medium. The antibacterial substance was stable up to 100°C and has a molecular weight less than 3 kD. Significant pH changes were not observed in the conditioned medium, eliminating the possibility of inhibition caused by secretion of organic acids or hydrogen peroxide. The spectrum of inhibitory activity of this substance was also tested against various Gram-positive and Gram-negative bacteria, and was seen to inhibit the growth of Bacillis megaterium, Bacillus subtilis, Micrococcus luteus, and Staphylococcus saprophyticus. Further investigation on the physical nature and solubility of the antibacterial substance is required for isolation and identification of the inhibitory substance
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
Vibrio coralliilyticus strain OCN014 is the Etiological Agent of Acropora White Syndrome at Palmyra Atoll
No full textCorals play an important role in marine ecosystems by providing a habitat for many members of the reef community. Threats such as coral disease have pushed many reefs past the point of recovery and are lost forever. Investigation of coral disease outbreaks at Palmyra Atoll in 2010 and 2011 resulted in the isolation of Vibrio sp. OCN014 from diseased Acropora cytherea. OCN014 was proposed as the pathogen responsible for the disease Acropora white syndrome (AWS), which affects Acropora spp. throughout the atoll. In this study, Koch’s postulates were applied to demonstrate OCN014 as the etiological agent of AWS. OCN014 was determined to be a strain of Vibrio coralliilyticus, a species of bacteria previously shown to cause disease in coral. Under laboratory conditions, infections by OCN014 were found to be temperature dependent, with infections observed at 29 °C and none at 25 °C. The genome of OCN014 was sequenced and compared to a previously published genome of the V. coralliilyticus strain type strain BAA-450, which has also been shown to be temperature sensitive. A genetic system was developed to screen for genes which are differently expressed at 25 and 29 °C to identify potential regulators of OCN014 virulence
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