1,720,963 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
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
Pseudohypoaldosteronism Type II or Gordon Syndrome: A Rare Syndrome of Hyperkalemia and Hypertension With Normal Renal Function
No full textPseudohypoaldosteronism type II (PHA II) or Gordon syndrome is characterized by hyperkalemia, hypertension, hyperchloremic metabolic acidosis, low plasma renin activity, and normal kidney function. We report a rare case of a young adult female patient presenting with abdominal pain, diarrhea, and vomiting. She was hypertensive during the presentation. Blood work showed mild anemia, hyperkalemia, hyperchloremia, and metabolic acidosis, with normal renal function and liver function. Plasma renin activity and aldosterone levels were low-normal. These findings were suggestive of PHA II or Gordon syndrome. It is a rare familial disease, with a non-specific presentation and no specific diagnostic criteria, and physicians should suspect it in patients with hyperkalemia in the setting of normal glomerular filtration, along with hypertension (which can be absent), metabolic acidosis, hyperchloremia, low plasma renin activity, and relatively suppressed aldosterone
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Diffuse Parenchymal Micro-calcifications in the Thyroid Gland with or without Thyroid Nodule: Clinical Significance
No full textIntroduction: Microcalcifications are sub-centimetric punctate echogenic foci without posterior acoustic shadowing seen in ultrasonography (US). They may represent dystrophic calcification, intravascular tumor thrombi calcifications, or malignant papillae infarction. Fine needle aspiration (FNA) biopsy is warranted if microcalcifications are seen in thyroid nodules, especially in solid hypoechoic nodules. Microcalcifications without nodules can be seen in up to 2% of patients with papillary thyroid cancer (PTC) and have been reported in diffuse sclerosing variant PTC and classical PTC. They are a predictor of thyroid malignancy, even without a clear nodule, and are associated with multifocality, intrathyroidal lymphatic spread, and cervical lymph node metastasis. Description of the Case: A 30-year-old female presented with diffusely enlarged thyroid and finding of snowstorm appearance on US of the thyroid. She has a family history of Graves\u27 disease. Her TSH was 2.49 (0.45-5.33uIU/mL) and thyroid peroxidase antibody was 21 (\u3c9IU/mL). US of the neck revealed a heterogeneous nonenlarged thyroid gland with diffuse hyperemia and numerous punctate echoes. A discrete nodule was not visualized. Several lymph nodes with punctate echoes were seen around the right thyroid lobe. CT neck showed a 1.8 x 1.1 cm heterogeneous nodule with a large dystrophic calcification in the right thyroid lobe and several abnormal-appearing right level 2 to 4 lymph nodes. FNA of the dominant right neck lymph node was positive for PTC. Thyroglobulin in the washout from the lymph node FNA was 63,843 ng/mL. She underwent total thyroidectomy with central and right lateral neck dissection. Pathology revealed 1.8 cm conventional type PTC in the right thyroid lobe, papillary thyroid microcarcinomas diffusely involving both thyroid lobes (greater than 20 foci), all welldifferentiated with papillary and follicular growth patterns, and 26 out of 74 regional lymph nodes with PTC (largest 1.8 cm). Chronic lymphocytic thyroiditis was also seen. Discussion: Diffuse microcalcifications in the thyroid gland, even without a clearly delineated thyroid nodule is an indicator of thyroid malignancy and can predict cervical lymph node metastasis. Current guidelines do not specifically address how to manage this sonographic finding. Further evaluation to assess cervical lymph nodes is warranted if diffuse parenchymal microcalcifications are seen on ultrasound
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