1,721,165 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
Endoanal ultrasound for preoperative evaluation of perianal sepsis
No full textEndoanal ultrasound (EUS) imaging performed with a 10-MHz rotating probe can be easily performed by surgeons in the office or the operating room. The procedure is well tolerated, easily repeatable, and cost effective. Major indications are perianal sepsis, fecal incontinence, and anorectal malignancies. Whether used for the evaluation of malignant or benign disease, this technique has been shown to be accurate in identifying normal anatomy and anatomic alterations.
EUS has shown higher accuracy than physical examination in localizing the internal opening and in detecting horseshoe extension of anal fistulas. Compared with MRI, EUS demonstrated similar sensitivity but lower specificity at detecting perianal fistulas; however data from the literature are heterogeneous and no definitive conclusion can be made. The costs for MRI are higher and not all hospitals have the facility.
A total of 934 EUS examinations were performed in our Unit for perianal sepsis from January 2007 to September 2013, we found an intersphincteric abscess, a transsphincteric fistula, and a horseshoe extension in 54%, 32%, and 8% of cases, respectively. Overall accuracy in identifying the internal opening was over 90%.
In conclusion, EUS is a reliable and reproducible method for preoperative assessment of anorectal diseases, at present it should be consider the diagnostic tool of choice for patients with perianal sepsis
A late Bartonian-early Priabonian benthonic foraminiferal assemblage from Tornimparte near L'Aquila (Central Italy).
No full textA previously undescribed microfaunal assemblage from a late Bartonian-early Priabonian slope setting from Tornimparte near L'Aquila (Central Apennines) is illustrated, yielding taxonomically diverse smaller benthonic and larger foraminifera. The slope represents an area of redeposition, erosion and in situ deposition, with hemipelagic deposits and resediments. The assemblage consists of mainly upper bathyal smaller benthonics and redeposited taxa typical of shallow water. The present work shows that, in terms of the current larger foraminiferal standard biozonation, the recognizability of the biozones at the Middle/Upper Eocene boundary is seriously hampered by the rareness of suitable markers, even in taxonomically diverse assemblages
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
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