1,721,036 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
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
Ambient Ozone and Cadmium as Risk Factors For Congenital Diaphragmatic Hernia
Get PDFCongenital diaphragmatic hernia (CDH) results from a defect in the diaphragm through which abdominal contents enter the thorax displacing the heart and the lungs. This causes lung hypoplasia and varying degrees of pulmonary hypertension resulting in high rates of morbidity and mortality. Though CDH has a prevalence rate of 2.61 per 10,000 live births it is an expensive birth defect with an estimated annual cost of nearly $250 million for all CDH survivors. Maternal exposure to air pollutants have not been studied as risk factors for CDH in humans. Ambient ozone has been found to be risk factors for certain birth defects including congenital heart defects, chromosomal anomalies, and limb reduction defects. Cadmium, however, has been found to be a risk factor for diaphragmatic hernia, cleft palate, renal defects, anopthalmia, microphthalmia, anal atresia, undescended testes, and dysplastic ears in animal studies only. The objectives of this study were to: 1) examine the prevalence, temporal trends, and correlates of CDH among live-born infants during 1998–2012; 2) investigate the association between sociodemographic and perinatal characteristics and neonatal and one-year survival among infants with CDH and its subtypes, isolated and complex; 3) examine the role of ambient ozone as a risk factor for CDH; and 4) determine the association between maternal exposure to ambient cadmium in air and CDH and assess if maternal smoking during pregnancy is an effect modifier of the cadmium-CDH association. To answer these questions we used a population-based, retrospective cohort study using data from the 1998–2012 Florida Birth Defects Registry. We classified CDH cases into isolated and complex. A case that was associated with other anomalies listed on the National Birth Defects Prevention Network list of major structural reportable defects was classified as complex CDH. We used Poisson and joinpoint regression models to compute prevalence ratios and assess temporal trends, respectively. Kaplan-Meier survival curves and Cox proportional hazards regression were used to describe neonatal and one-year survival and estimate hazard ratios of neonatal and one-year mortality. We then used multilevel Poisson regression models to examine the association between maternal exposure to ambient ozone and CDH as well as cadmium and CDH. We conducted stratified analyses to test for effect measure modification by maternal smoking status. The study population to answer the first two questions consisted of 3,209,775 live-born infants (including 1,025 cases). To answer the third and fourth questions, the study population consisted of 3,039,685 and 2,591,395 live-born infants (including 981 and 840 cases), respectively. We found a 4% increase in the annual prevalence of CDH among complex cases, but no trend for isolated cases. We observed higher prevalence of CDH among infants born to mothers with high school or less maternal education and for multiple births. Female sex and maternal obesity were found to be associated with decreased risk for CDH. The most important predictor of neonatal and one-year mortality was gestational ag
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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