1,720,957 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
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
Wandering Spleen: A Rare Condition with Splenic Torsion and Infarction in an Elderly Patient
Full text linkEctopic spleen or wandering spleen is an uncommon presentation in which the spleen's anatomical location is different from its fixed position in the left upper quadrant of the abdomen, due to the absence of the typical peritoneal attachments; the spleen is more mobile inside the abdomen. Congenital or acquired conditions are the cause of this anomaly, which could ultimately result in torsion and splenic infarction. Less than 0.2% of wandering spleen cases are reported annually, making it a rare clinical manifestation. Splenic vascular pedicle torsion can result in complications that can cause symptoms of an acute abdomen as a result of ischemic necrosis of the spleen. Computed tomography and ultrasonography with Doppler or CEUS are essential for accurate diagnosis due to the vague clinical signs and potential complications. This case involves a 70-year-old elderly woman who complained of extreme abdominal pain and vomiting for three days. On physical examination, a tense right lower quadrant lump was palpated, when she visited the emergency room. An urgent CT scan was done for the acute abdomen which revealed torsion of the splenic pedicle in a wandering spleen
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
Ewing’s Sarcoma of the Adrenal Gland; A Rare Extraosseous Presentation
Full text linkEwing sarcoma also known as peripheral primitive neuroectodermal tumors (ES/PPNETs) usually produce in the chest wall, extraosseous soft tissues, and long or flat bones, however only rarely in solid organs. Although they can develop in any part of the body, development in the adrenal glands is very uncommon. We present a case of Ewing sarcoma (PNET) of the adrenal gland and the extraordinary diagnostic and therapeutic challenges faced during its diagnosis. Early detection of extraosseous disease with radiological imaging and the multimodality treatment strategy lowers morbidity and death in Ewing’s sarcoma of the adrenal gland
Ewings Sarcoma Mimicking a Schwannoma: MRI Findings of a Rare Case
Full text linkEwing’s sarcoma is among the most frequent yet highly aggressive neoplasms of the bones presenting in adolescents and children under the age of ten with a slight male predilection. It is now broadly categorized into a set of tumors recognized as Ewing’s sarcoma family based on the same histology and genotype of these tumors. This group of tumors includes Ewing’s sarcoma of bones, the 2nd most frequent bone malignancy, Askin tumors, PNET, and those rarely occurring extraosseous Ewing sarcoma (peripheral neuroepithelioma). Extra-osseous Ewing’s is a rare presentation occurring in only 5% of patients. Here we present such a case of an extra-osseous Ewing’s sarcoma in a 13-year-old female presenting to our hospital with a large mass in the sacral region. The interesting imaging findings and his histopathology are discussed
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