1,721,002 research outputs found
Prevalence, gender correlates, and co-morbidity of trichotillomania.
Get PDFTrichotillomania is a mental health condition characterized by repetitive pulling out of one's hair, often leading to functional impairment and/or distress. A convenience sampling of 10,169 adults, aged 18-69 years, representative of the general US population, completed a survey to establish occurrence of trichotillomania, other mental health concerns, and impact of the illness. 175 (1.7%) identified as having current trichotillomania. Rates of trichotillomania did not differ significantly based on gender (1.8% of males and 1.7% of females). The mean age of onset for trichotillomania was 17.7 years. The mean age of onset differed significantly for males (mean 19.0 years) versus females (mean 14.8 years (p = 0.020). The average amount of distress reported due to trichotillomania was relatively high, and 79% of people with trichotillomania had one or more mental health comorbidities, the most common being anxiety/depressive disorders, OCD, PTSD, and ADHD. This study suggests trichotillomania is relatively common in the general population and typically characterized by moderate-high distress and high rates of comorbidity
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
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Lung Hyperinflation and Cardiac Impairment in Chronic Obstructive Pulmonary Disease
No full textChronic obstructive pulmonary disease (COPD) is a leading cause of mortality and morbidity worldwide. Significantly, COPD carries a 2-5 fold increased risk of cardiovascular disease (CVD). This association persists even after accounting for shared risk factors, such as tobacco smoking. However, few studies have evaluated distinct pathophysiological mechanisms contributing to poor cardiovascular outcomes in individuals with COPD and CVD. Our hypothesis is that lung hyperinflation from COPD influences this cardiopulmonary relationship. In support of this hypothesis, studies of lung volume reduction surgery have suggested improvement in cardiovascular performance after surgical deflation. However, the mediators of this relationship are still generally unclear and essentially unknown in patients with both COPD and CVD. Given the frequent co-morbidity of COPD and CVD, an understanding of this complex relationship is critical to: 1) identifying COPD patients at risk for poor cardiovascular outcomes and 2) developing novel treatments to address this additional CVD risk in COPD patients. The purpose of this project is to identify structural, hemodynamic, and functional cardiac alterations unique to subjects with hyperinflation from a population of individuals with both COPD and CVD. We hypothesize that amongst individuals with COPD and CVD, lung hyperinflation leads to decreased cardiac chamber sizes, diminished cardiac filling, and, consequently, reduced cardiac output which can be reversed with lung deflation strategies. We will first investigate these questions using a local cohort of 8,000 subjects who have undergone cardiac MRIs, the current gold standard for cardiac chamber quantification, and analyze CMR- derived measures of cardiac structure and function in subjects with COPD and CVD, with and without hyperinflation. To understand the relationship of cardiac geometry to cardiac physiology, we will analyze previously ascertained invasive hemodynamic parameters from right heart catheterization, the gold standard for such measurements, in the same subjects. To help discern causal effects, we will use a novel reversible, non-invasive lung deflation device prospectively on ten subjects with hyperinflation and evaluate the hemodynamic effects of acute deflation with non-invasive impedance cardiography.COPD; cardiac MR
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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