1,720,970 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
Effect of HIV/AIDS on fertility: historical evidence from South Africa’s women educators
No full textContext/Background: The HIV/AIDS epidemic remains a public health challenge. Globally, South Africa ranks second in HIV prevalence and has the second lowest fertility rate in sub-Saharan Africa. The effect of HIV/AIDS on fertility is contentious, although it is often assumed in population projections that HIV/AIDS reduces fertility. This study examines the effect of HIV/AIDS on the probability of getting pregnant among South Africa’s educators controlling for confounders.Data Source and Methods: The data consisted of a representative sample of educators in public schools in South Africa in 2004. Statistical analysis utilized multivariate logistic regression.Results: Controlling for confounders, HIV positive women educators aged 18-34 had higher odds of being pregnant in the preceding 12 months compared with HIV negative women educators in the same age group.Conclusion: There was no evidence from this study that HIV positive women were less likely to be pregnant than HIV negative women
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
Dynamics of communicable diseases mortality in South Africa, 2000-2013
Get PDFContext/Background: Communicable diseases dominate non-communicable diseases as causes of death in Africa. However, knowledge about their dynamics in the region is limited. This study examines the dynamics of communicable diseases mortality during the period 2000-2013 in South Africa. Data Sources and Methods: The data consisted of death records from South Africa’s death registration system utilizing International Classification of Diseases Revision 10 codes. The estimates included computing age standardized death rates and logistic regression of factors associated with communicable diseases deaths. Results: Communicable diseases’ deaths contributed at least a third to total deaths in South Africa in 2013.Conclusion: Despite the roll out of free anti-retroviral therapy in public health facilities since 2004 and contrary to what some other researchers have argued, death rates from HIV/AIDS as underlying cause of death, increased during the period 2000-2013
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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