1,720,959 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
A ultra-sonografia no diagnóstico de câncer em nódulos de tireóide
Get PDFA doença nodular da tireóide (DNT) é um problema clínico comum, e na mawna dos casos tem etiologia benigna. O câncer de tireóide, entretanto, também pode manifestarse sob a forma de nódulos tireoidianos, e os pacientes com DNT com maior risco de malignidade devem ser identificados e encaminhados a cirurgia. A punção aspirativa com agulha fina (PAAF) é o principal método diagnóstico na avaliação da DNT, permitindo a redução do número de tireoidectomias e a duplicação do número de carcinomas nas cirurgias, mas os resultados suspeitos, insatisfatórios e os falso-negativos, por outro lado, constituem suas limitações. A ultra-sonografia (US) é um método não-invasivo que permite identificar características dos nódulos tireoidianos consideradas sugestivas de malignidade, porém o seu uso na diferenciação de nódulos malignos e benignos ainda é controverso.O objetivo deste estudo foi avaliar o desempenho da US na detecção de câncer na DNT, compará-lo ao obtido pela P AAF e verificar o efeito do tamanho dos nódulos no desempenho da US. Em estudo transversal, prospectivo, 80 indivíduos com DNT submetidos a tireoidectomia foram avaliados por PAAF e US. As características ultrasonográficas em combinações em paralelo resultaram em um melhor desempenho da US na detecção de câncer na DNT do que as características agrupadas e algumas isoladas. Microcalcificações, halo ausente ou incompleto, ou hipoecogenicidade resultou em sensibilidade de 81,3% e especificidade de 70,3% na detecção de câncer em nódulos tireoidianos. Esse desempenho foi semelhante ao obtido pela PAAF. Foram encontrados dados sugestivos de que a US apresente um melhor desempenho em nódulos com o maior diâmetro entre 3 e 5 cm ou com volume entre 7 e 20 cm3 . Os resultados sugerem que a US pode ser útil no diagnóstico de malignidade em nódulos tireoidianos.Nodular thyroid disease (NTD) is a common clinicai problem and usually associated a benign etiology. However thyroid cancer may also present as a thyroid nodule therefore it should be identified and treated surgically. Fine needle aspiration biopsy (FNAB) is the principal diagnostic method to identified the malignant etiology of thyroid nodules but it has limitations such as 'suspicious' diagnostic results, insufficient material for diagnosis and false-negative results. Thyroid ultrasound (US) is a non-invasive method that may identify certain nodular features that may be related to a malignant etiology but its role for this purpose remains controversial. The aim of the present study was to evaluate the US performance to predict cancer in NTD, to compare it to the FNAB performance, and to assess the size of nodules effect in the US performance. In a transversal, prospective study, 80 patients with NTD that were sent to surgery were evaluated by both FNAB and US of the thyroid gland. The presence of microcalcifications, partial or completely absent halo and hypoecogeniety were the US aspects that analyzyd in parallel combinations, resulted in better performance to detect cancer in NTD than clustering and some isolated characteristics. These US features yield a sensitivity of 81.3% and a specificity of 70.3% in the detection of cancer in thyroid nodules. This US performance was similar to the one of FNAB. The data suggest that thyroid US performs better in nodules measuring 3 to 5 cm in its greater diameter or whose volume were between 7 and 20 cm3 . Our data also suggest that thyroid US may be useful to identify malignant thyroid nodules
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
É Possível Evitar a Recuperação do Peso após o Emagrecimento?
Get PDFObesity is a chronic disorder with a progressive and relapsing profile, and it has reached epidemic global proportions. It is a preventable and treatable cause of increased early mortality, however, in most of cases, it reaches only transitory success. When obese people lose weight, orexigen hormones increase and sacietogen ones decrease, causing a persistent increase in hunger and a decrease in body energy expenditure. In a obesogenic environment, this metabolic imbalance causes obesity relapse. The obesity treatment must focus in hyperproteic diets, intensive and frequent exercise and a combination of drugs that counteract the compensatory mechanisms present in who have lost weight
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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