1,720,957 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
Antibiotic Susceptibility and Detection of tdh Gene Among Vibrio parahaemolyticus Isolates from An Outbreak Case
Get PDFAssessment of Environmental Variables as Potential Risk Factors for the Transmission of Leptospira spp.
Get PDFA diverse Leptospira serovars and reservoir hosts have been reported to circulate in various environmental settings in Sarawak. The risk of infection has been linked to socio-economic and environmental risk factors. This underscored the potential for a shift in the transmission dynamics of leptospirosis in Sarawak. It is imperative to consider the broad socio-demographical and environmental determinants such as climate and agricultural intensity, which may act as modifiable predictors for a disease like leptospirosis. These factors may be unevenly distributed, and their spatial distribution may influence the dynamics of leptospirosis. Hence, this study aims to determine the demographical and spatial distribution of leptospirosis using confirmed cases from 2011-2018 at a district level. This study also aims to investigate the global and localised relationship between leptospirosis with climate and agricultural variables. The demographical distribution of leptospirosis was analysed based on descriptive and inferential statistics by aggregating the data according to demographical groups. Spatial statistics including global and local Moran’s I was employed to study the spatial autocorrelation of leptospirosis incidence rate by districts. The potential clustering of hot spot and cold spot regions were investigated using Getis-Ord-Gi* statistics. The relationship between environmental factors and spatial density of geocoded leptospirosis cases was explored by using global Poisson regression (GPR) and geographically weighted Poisson regression (GWPR). A total of 4,648 cases were reported from 2011-2018 with the highest incidence in 2018, with 31 cases per 100,000 population. One hundred and thirty-nine fatal cases were reported, with the overall case fatality rate of 2.99%. Higher incidence rate per 100,000 population was observed in males (35.79; 95% CI: 22.92- 48.67), individuals aged between 50-59 years (27.22; 95% CI: 15.91- 38.53), other Bumiputera ethnic group (32.21; 95% CI: 16.80-47.82) and elementary occupational
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type (56.93; 95% CI: 26.49-87.37). Overall, the leptospirosis incidence in Sarawak demonstrated a positive spatial clustering (Moran’s I: 0.28) with significant positive local clustering observed in 2012 (Moran’s I: 0.23), 2013 (Moran’s I: 0.33) and the highest Moran’s I in 2014 (0.45). An increasing incidence trend was observed towards the southeast region with a standardised incidence ratio (SIR) between 0.39 and 4.54. The southeast region was identified as a significant hot spot region (z-scores: 1.58 to 2.83). Leptospirosis in the hot spot region was concentrated in areas with higher water vapour pressure (exp(β): 1.12; 95% CI: 1.02 - 1.25) and annual precipitation (exp(β): 1.15; 95% CI: 1.02 - 1.31), with lower precipitation in the driest month (exp(β): 0.85; 95% CI: 0.75 – 0.96) and the wettest quarter (exp(β): 0.88; 95% CI: 0.77 – 1.00). Water vapour pressure (WVP) has the most variation effect across the hot spot region with a standard deviation of 0.62 (LQ: 0.15; UQ; 0.99) while least variation in effect was observed in annual precipitation (ANNP) with a standard deviation of 0.14 (LQ: 0.11; UQ; 0.30). The GWPR model explained better relationships between leptospirosis and environmental covariates as denoted by the reduction in AICc value from 519.73 to 443.49. The results of localised relationships presented in this study could be used to formulate spatially targeted interventions. This would be useful particularly in localities with strong environmental or socio-demographical determinants for the transmission leptospirosis
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
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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