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Low cost alternative equipment for telepathology. Use of 35mm film scanners for teleconsultation
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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
Rettocolite ulcerosa e displasia: quale monitoraggio nei pazienti a rischio?=Ulcerative colitis and dysplasia: Which monitoring in risk patients?
No full textFirst study, by Bargen, based on relations between cancer and U.C. dates back to 1928; since then it is currently common knowledge that patients with U.C. have an incremented risk to develop cancer of the colon compared to the average population. At present it seems that risk is related to the duration and the extension of disease and only partially to the activity degree. The increase of the risk is to be considered not before seven years since the outbreak of the disease. The increased risk is particularly high in patients with pancolitis. The objective of this study is to verify the effectiveness of the colonoscopic surveillance program to which our patients have been submitted, the above in order to establish a long range management program of patients themselves. 148 patients affected by U.C. have been engaged, 90 males and 58 females, average age 40 years. The following factors have been evaluated for each patients initially and every six month: family and pathological remote anamnesis, age of disease's beginning, histological diagnosis, extension, activity clinical indexes, endoscopic aspect and carried out therapies. Within the considered sample the average duration of disease, since the first histological diagnosis, was 71.4 months; 40 of them presented a duration above 84 months; the extension of the disease involved left colon in 114 cases (77%) and whole colon in 34 cases (23%). 14 patients presented dysplasia, out of them we observed 10 slight intensity case and 4 severe; it must be underline that the evidence of dysplasia has never been verify at the first endoscopical exam but only in following controls. Patients with dysplasia were 51 years old on average; the average duration of the disease was 124 months. Dysplasia occurred in 25% of subjects with an increased risk, that is in patients with disease duration above seven years. Malignant degeneration was found in 4 out of 148 cases, 2 males and 2 females, average period between diagnosis and disease degeneration was 17 years. From the analysis of results we deduce the following conclusion: the utility of making colonoscopic management for high risk patients, continuing within even after first negative controls; in no risk population, it would be better to have a clinical approach with colonoscopic exam only if there's an alteration of symptomatology
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