1,720,958 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
Dengue 2 Infection in Wild Caught Papio Anubis (Olive Baboons) and Chlorocebus Aethiops (African Green Monkey) from Selected Regions of Kenya
Get PDFDengue viruses, family Flaviviridae and genus Flavivirus occur as four antigenically
distinct serotypes denoted as dengue virus 1, 2, 3, 4 (DENY-I, 2, 3, 4). The four
serotypes are known to broadly infect different vertebrate hosts including humans, wild
animals and various species of non-human primates (NHPs). Despite the fact that NHPs
have increasingly been implicated as potential sources of emerging zoonotic viral
diseases, there is no available scientific data on sylvatic dengue virus surveillance in
Kenya. The present study investigated the sero-prevalence of DENY-2 exposure and
characterized DENY serotypes circulating in NHPs from Laikipia, Aberdares, Kajiado,
Kibwezi, Kitale, Nairobi and Namanga regions. A total of 287 wild-caught NHPs,
comprising of 115 Olive baboons (Papio anubis) and 172 Africa Green monkey-AGM
(Chlorocebus aethiops) were sampled. Sera prepared from the 287 blood samples were
tested for anti-dengue viral immunoglobulin gamma (IgG) antibody using enzyme linked
immunosorbent assay (ELISA). Samples which were positive for anti-dengue IgG were
subsequently subjected to a nested polymerase chain reaction (PCR) test with specific
primers targeting the capsid and pre-membrane genes of the virus. The sero-prevalence
of dengue virus exposure was 35.7% (41/115) in P anubis and 39.5% (68/172) C.
aethiops. RT-PCR confirmed that 1.7% (2/115) P anubis and 2.3% (4/172) C. aethiops
were positive for dengue virus. The 2 baboons and 4 AGMs were from Laikipia,
Kakamega, Kibwezi and Kitale respectively. Chi-square test indicated no statistical
significance in sero-prevalence (P = 0.537) results between the species. In conclusion,
this study provides strong evidence of dengue virus infection among P anubis and C.
aethiops in Kenya. Although this epidemiological study indicates high dengue exposure
in NHPs, there was significantly low active infection as evidenced by PCR results. My
conclusion is that sylvatic dengue viruses 2 circulates in non-human primates found in
Kenya. I recommend that the country should strengthen its surveillance on sylvatic
dengue viruses which will likely become a serious public-health problem in the near
future in human population that live in close proximity to animals
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
Endemicity of Yaws and Seroprevalence of Treponema pallidum Antibodies in Nonhuman Primates, Kenya
No full textHuman yaws has historically been endemic to Kenya, but current epidemiologic data are lacking. We report seroprevalence for Treponema pallidum antibodies in olive baboons (Papio anubis) and vervet monkeys (Chlorocebus pygerythrus) in Laikipia County, Kenya. Our results suggest endemicity of the yaws bacterium in monkeys, posing a possible zoonotic threat to humans.US Agency for International Development Emerging Pandemic Threats PREDICT ProjectUnited States Agency for International Development (USAID) [GHN-A-OO-09-00010-00]; German Research FoundationGerman Research Foundation (DFG) [DFG KN 1097/3-1]This study was supported by the US Agency for International Development Emerging Pandemic Threats PREDICT Project (cooperative agreement mo. GHN-A-OO-09-00010-00) and the German Research Foundation (grant DFG KN 1097/3-1 to S.K.)
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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