1,721,057 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
No full textWe 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
Multimorbidity and cardiovascular disease in the United Kingdom
No full textBackground: Multimorbidity, the presence of two or more conditions in the same individual, is common, particularly in populations with cardiovascular disease. Addressing the evidence gaps in temporal trends, effects on treatment, and associations with relative mortality risk in the field of multimorbidity will inform health service planning, resourcing and delivery of quality patient care for an increasingly multimorbid population.
Aims: The aim of this thesis was to examine multimorbidity and cardiovascular disease using the United Kingdom’s Clinical Practice Research Datalink. To achieve this aim, the specific objectives of this thesis were to:
1. Select an appropriate framework for measuring multimorbidity, including selection of conditions, in the Clinical Practice Research Datalink
2. Prepare data in the Clinical Practice Research Datalink for analysis, including phenotyping of the selected chronic conditions
3. Investigate patterns and temporal trends of comorbidities in incident cardiovascular disease
4. Examine the association between multimorbidity and blood pressure & antihypertensive prescription
5. Investigate the association between multimorbidity and mortality in patients with cardiometabolic comorbidities
Methods: First, a literature review was conducted to select an appropriate method of measuring multimorbidity applicable to the Clinical Practice Research Datalink. Second, raw data in the Clinical Practice Research Datalink was extracted and converted to data for analysis, including phenotyping of chronic conditions. Third, age/sex-standardised prevalences of comorbidities were calculated for patients with incident cardiovascular disease, with stratification by age, sex and socioeconomic status. Fourth, a landmark cohort analysis using linear and Poisson regression investigated the association between number & type of comorbidity, and blood pressure & prescription of antihypertensives. Finally, a cohort study using Cox proportional hazards regression examined the association between cardiometabolic comorbidities and mortality, with adjustment for a range of additional comorbidities.
Results: The method of measuring multimorbidity was highly heterogeneous, and a pragmatic approach of examining multimorbidity by number of conditions, specific comorbid conditions, and condition groups, was chosen for subsequent analyses. Data in the Clinical Practice Research Datalink was extracted and processed for analytical use, including phenotyping of 60 chronic conditions. The prevalence of patients with multimorbidity in incident cardiovascular disease increased between 2000 to 2014. Furthermore, 4 out of the top 10 comorbidities were non-cardiovascular conditions, and patterns of comorbidities differed by age group and sex. The presence of comorbidity was associated with lower blood pressure in hypertensive patients, largely driven by a lower blood pressure at diagnosis, even when differences in health service use were accounted for. The mortality risk of patients with multiple cardiometabolic comorbidity was partly explained by additional comorbidities, and the combined risk of concomitant cardiometabolic conditions was less than the additive risk of the individual conditions
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