1,721,078 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
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
CARCINOMA MUCOEPIDERMOIDE SCLEROSANTE CON EOSINOFILIA E “NIDI CELLULARI SOLIDI” DELLA TIROIDE. STUDIO IMMUNOISTOCHIMICO
No full textIl carcinoma mucoepidermoide sclerosante con eosinofilia (CMSE) della tiroide è una neoplasia rara, la cui origine è tuttora dibattuta. La presenza di una differenziazione squamosa in questo tumore, ha fatto avanzare l’ipotesi di un’origine dai cosiddetti “nidi cellulari solidi” (NCS), piccoli aggregati cellulari con aspetti squamoidi e , talora cistici, che sono ritenuti essere residui del corpo ultimobrachiale. Allo scopo di acquisire nuove informazioni sul CMSE e sulla sua eventuale correlazione con i NCS, abbiamo studiato 2 casi di CMSE e ne abbiamo confrontato morfologia e immunofenotipo con una serie di 14 NCS tiroidei. Tra questi, 8 presentavano aspetti cistici piu’ o meno marcati con evidenza di mucosecrezione, prevalentemente di tipo neutro (PAS positiva). Tutti i casi sono stati testati con anticorpi anti TTF1, anti-p63, anti citocheratina 19 e anti MUC 2, 5,6. Inoltre con gli stessi anticorpi sono stati testati anche 2 CMSE.
Nella nostra serie, i due casi di CMSE hanno mostrato un immunofenotipo simile, anche se non identico, ai NCS. Infatti entrambi i CMSE e tutti i NCS sono risultati positivi con p63 e citocheratina 19. Il TTF1 è risultato focalmente positivo nella componente ghiandolare dei CMSE e negativo in quella squamoide, mentre nei NCS lo stesso anticorpo ha decorato in 3 casi rare cellule della componente cistica-ghiandolare. Anche con gli anticorpi anti-MUC i risultati sono stati simili: il secreto della componente cistica e rare cellule in 6 casi di NCS sono risultati positivi con anti MUC 6, cosi’ come nei due casi di CME, mentre MUC 2 e 5 sono risultati negativi in tutti i casi. Anche se sarà necessario confermare i dati con lo studio di un numero maggiore di CMSE, i nostri risultati sembrano supportare l’ipotesi di un’origine comune per questo tumore e i NCS tiroidei
Chickenpox related granulomas in a healthy young woman with dyspnea and fatigue: a case report
No full textAn Unusual Cause Of Alveolar Accumulation Of Foamy Macrophages In Adults
No full textA 33-year-old non-smoking female presented with a 6-months history of mild dyspnea and cough. Physiologic testing showed a moderate restrictive ventilatory impairment, whereas high-resolution CT revealed bilateral ground-glass opacities and thickening of interlobular septa. A videothoracoscopic biopsy was performed. Microscopically, the pulmonary architecture was preserved, with only a minimal interstitial fibrosis. The alveolar and the bronchiolar spaces were filled by finely vacuolated macrophages, whereas Pas-positive macrophages expanded the pleural and the interlobular connective tissues. The bronchiolar epithelium had a peculiar clear cytoplasm. Three months after the biopsy, the patient presented with abdominal pain, hepatosplenomegaly and thrombocytopenia. A bone marrow biopsy showed a “sea-blue histiocytosis”. The sphingomyelinase activity, evaluated in cultured fibroblasts, was markedly reduced and a diagnosis of Niemann-Pick disease type B was performed.
In the lung: 1) the evaluation of both morphology and localization of the macrophages may provide useful diagnostic clues to the pathologist; 2) although rare, the possibility of a metabolic disease must be considered also in adults; and 3) a diffuse alveolar accumulation of foamy macrophages without a significant fibrosis/inflammation, particularly when associated with a clarification of the bronchiolar epithelium, is characteristic of pulmonary involvement in Niemann-Pick disease
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