1,720,954 research outputs found
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
Isolation and characterisation of antibiotic-producing marine actinomycetes
No full textBibliography: leaves 94-102.Resistance to antibiotics poses a serious threat to healthcare and new drugs are needed. This is especially true for tuberculosis (TB), which is at epidemic levels in South Africa. Multidrug-resistance in Mycobacterium tuberculosis makes TB more difficult and expensive to treat and increases mortality rates. The surfaces of 12 seaweed species found in South African coastal waters were screened for the presence of antibiotic-producing actinomycetes. Of the 67 strains isolated, 26 exhibited antibacterial activity against Mycobacterium aurum A+ and for Enterococcus faecium VanA. These actinomycete strains were physiologically characterised. Three strains showing very strong antibacterial activity were further characterised by the use of chemical taxonomy, DNA sequencing and scanning electron microscopy and were shown to belong to the genus Streptomyces. A strain not showing activity was shown by the same methods to belong to the genus Micromonospora. Partial purification of the active compounds was carried out on the three strains exhibiting strong antibacterial activity. All were shown to produce moderately to highly polar compounds
Constructing a family tree in an online space as an act of digital curation: an auto-hermeneutics study
Full text linkDigital curation requires taking appropriate actions throughout the lifecycle of digital data. Digital curation of research data in a lifecycle is referred to as the custodial approach, while the pragmatic approach is the curation of digital content in everyday life, such as on websites or social media platforms (Dallas, 2016). Online genealogy, in which a genealogist is using a digital platform to construct a family tree and search for source documents, is an example of the pragmatic approach to digital curation. In this study I investigate genealogy through the lens of digital curation to discover how users curate their genealogical information on a major genealogy website, Ancestry.com. In this way, I consider how online genealogy can be studied as an example of the pragmatic approach to digital curation. This is a qualitative study making use of auto-hermeneutics – I collected data by systematic self-observation (SSO) and analysed it by interpretative phenomenological analysis (IPA). I reconstructed my own family tree in Ancestry.com, evaluating the research hints offered to me by the website algorithm and the member-constructed family trees which contained my ancestors. I found, among other things, that Ancestry.com makes the tree construction process easy and the research hints provided by the website can be verified if caution is exercised, but the same cannot be said for the family trees constructed by Ancestry.com members, many of whom do not practise caution in this endeavour. Study recommendations include a change in the data fields Ancestry.com uses for data capture from members or a change in which it processes and displays that data to ensure that omission of data does not cause incongruous errors to be displayed; and better visibility of the website's guidance on good research techniques to avoid the perpetuation of research errors. Ancestry.com already has verification functionalities which, if applied more widely, have the potential to improve the curation of member-constructed trees
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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