1,720,993 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Modeling the human classification of acute decompensated heart failure using abstracted medical record with machine learning
Full text linkHeart failure (HF) is a clinical syndrome in which the heart is not able to properly pump blood because of structural and functional defects, resulting in the body not getting enough blood. It affects millions of people in the United States and often leads to hospitalization or mortality. Acute decompensated heart failure (ADHF) is a sudden worsening of HF symptoms and is a powerful predictor of readmission for HF and death of patients with chronic HF post-discharge. In this thesis, we used data from the Atherosclerosis Risk in Communities (ARIC) study’s community surveillance of heart failure hospitalizations to develop machine learning classification models to accurately classify if a patient did have or did not have ADHF. We used abstracted hospital records and ADHF diagnosis, done by clinician review, to train the classifiers to identify ADHF cases. After data preparation through imputation and handling collinearity in the data, we had 2,925 records in our training set and 116 records in our test dataset. Data preparation, cross-validation, model creation, and data analysis were all done in R, and we created a decision tree using the rpart package and a boosted decision tree using the adabag package. Using these models, we observed classification accuracy rates of approximately 75% in the decision tree model and 79% in the boosted decision tree model. These rates were fairly consistent with those found in literature of machine learning models that were used to classify general HF and general heart disease cases. The success of our models, relative to those in literature, demonstrate the potential for machine learning to help identify ADHF cases among HF-related hospitalizations in the clinical setting.Bachelor of Science in Public Healt
RTS,S Malaria Vaccine not Found to be Modified by Spatial Location or Ecological Factors During a Phase III Randomized, Controlled Trial in Lilongwe, Malawi
Full text linkRTS,S was the first vaccine for Malaria approved for use by the European Medicines Agency and it is set to be administered to 360,000 children in Malawi, Ghana, and Kenya as part of a pilot implementation program in fall 2018. The efficacy of RTS,S was variable, possibly due to differences in transmission intensity, between the 11 sites and 7 countries participating in the 2009-2014 phase III trials. However, a within-site analysis examining environmental factors related to transmission intensity has yet to be conducted. We used data from the phase III trial of RTS,S, which enrolled 1,578 infants (6-12 weeks) and children (5-17 months) living in the Lilongwe District in Central Malawi and followed them for up to 4 years. A global positioning system survey and an ecological questionnaire were used to collect household locations and characteristics in order to investigate whether spatial location or household ecological factors were associated with the efficacy of RTS,S. We used negative binomial regression models to assess the effect of the vaccine on number of malaria episodes.Using data from 1189 (75.3%) of the phase III participants, we found that the location-specific malaria incidence varied over the study region from .072 to 2.11 estimated episodes per year. We found no evidence supporting the hypothesis that the efficacy of the RTS,S vaccine varied over the Lilongwe study region. We also found that malaria incidence was associated with grass roofs, certain window types, proximity to a waterway and low population density. However, we found no evidence supporting the hypothesis that these ecological variables impacted the efficacy of RTS,S.Our results suggest that transmission intensity did not play a role in the intra-site efficacy of RTS,S in Lilongwe, Malawi during the phase III trial.Bachelor of Science in Public Healt
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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