1,720,959 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
Cardiomyopathy and pericardial effusion in a 7 year-old boy with Β-thalassaemia major, severe primary hypothyroidism and hypoparathyroidism due to iron overload
No full textThe primary cause of cardiac dysfunction in thalassemia is believed to be myocardial iron overload. Besides iron, other factors may play a role in the impairment of myocardial contractility, including prolonged heart tissue hypoxia, pericardial involvement, arrhythmias, endocrine complications and vitamin D deficiency. We present the case of a 7 year-old boy with ?-thalassaemia major and cardiac dysfunction, pericardial effusion and associated endocrinopathies. His serum thyrotropin (TSH) level was increased, and total and free thyroxine (FT4) were low. In addition, biochemical results and serum PTH level were compatible with a diagnosis of hypoparathyroidism. Other laboratory findings were not consistent with rheumatic heart disease, viral myocarditis or autoimmune disease. The child was treated with digoxin, diuretics, oral calcium, vitamin D, L-thyroxine (25 microg daily, which was later gradually increased) and subcutaneous iron chelation therapy (45 mg/kg, six days/week). The patient was discharged from our Unit after 7 days and within 3 months he had appreciable myocardial improvement and disappearance of the pericardial effusion
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
Exaggerated TSH response to TRH ("Sub-Biochemical" hypothyroidism) in prepubertal and adolescent thalassaemic patients with iron overload: Prevalence and 20-year natural history
No full textThe severity of thyroid dysfunction in patients with beta-thalassaemia major is variable in different series. An exaggerated thyrotropin response to thyrotropin-releasing-hormone (TRH) has been found in 1 out of 5 beta-thalassaemia major patients. Because it is not well known how many of these patients will develop overt or subclinical hypothyroidism, we reviewed retrospectively the thyroid status (thyroid hormones, TBG, TG basal and TSH peak after TRH test) of 24 children and adolescents with beta-thalassemia major (mean age 12.1+/-3.9 years) on periodic transfusion therapy, regularly followed in our Centre during the last 20 years. As controls we studied 30 normal subjects aged 13.4+/-2.5 years. In our group of 24 thalassaemics an exaggerated TSH response to TRH test was found in 8 (33.3%), 3 of whom developed subclinical or overt hypothyroidism from 3 to 11 years later. TSH peak values correlated directly with ferritin levels, ALT, and compliance index to chelation therapy. Our data suggest that an exaggerated TSH response to TRH test is frequent in beta-thalassemia major, and may evolve into subclinical or overt hypothyroidism as we found in 37.5% of our patients with sub-biochemical hypothyroidism
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
- …
