1,720,970 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
True solitary pancreatic cyst in an adult: report of a case.
No full textThe differential diagnosis of cystic neoformations in the pancreas is challenging. We report a case of a true solitary cyst of the pancreas in a 26-year old woman. Abdominal magnetic resonance imaging and computed tomography showed a unilocular neoformation in the head of the pancreas, without obstruction of Wirsung's duct. We excised the cyst and performed Roux-en-Y loop pancreaticojejunostomy, but the patient suffered recurrent acute pancreatitis from Wirsung's duct stenosis. Thus, a new Roux-en-Y loop pancreaticojejunostomy was successfully done 6 months later. Histologically, the cyst was lined by cuboidal epithelium, immunohistochemically positive to anti-carbohydrate antigen 19-9 antibodies. To our knowledge, only 11 cases of solitary true cyst of the pancreas in adults have been reported, so the characteristics of this unusual entity are not well known. We propose a scheme for the differential diagnosis of cystic neoformations of the pancreas, starting from the histopathological definition of a true solitary cyst
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
Rare surgical complications of Crohn's disease. Clinical and therapeutic considerations.
No full textWe present our clinical experience in the management of rare surgical
complications in Crohn's disease. Two hundred and eight patients affected by
Crohn's disease were treated surgically between January 1992 and September 2001,
at the Department of Surgical and Gastroenterological Sciences of the University
of Padua. Rare surgical complications were identified in 17 patients (6.2%): 4
with small intestine adenocarcinoma, 5 with massive gastrointestinal bleeding, 5
with free peritoneal perforation and 3 with psoas abscesses. The very substantial
clinical variability of Crohn's disease is a constant challenge to researchers.
In particular, the high incidence of associated pathologies and complications
related to Crohn's disease makes this pathology extremely disabling. In addition,
this disease quite often appears to occur together with a rare complication
which, though in most cases its course tends to remain unknown, at times may be
potentially life-threatening. For this reason, it is crucial to suspect the
occurrence of these pathologies, especially in patients responding poorly to
therapy or in those whose symptoms suddenly become acute. Early diagnosis and
treatment are therefore fundamental for the most appropriate treatment to be
administered
Psoas abscess: a rare complication of Crohn's disease
No full textPsoas abscess is a rare complication of Crohn's disease.METHODS AND MATERIALS: We
evaluated the incidence of psoas abscess on 312 patients with Crohn's disease,
seen at our institution between 1992-2001.
RESULTS: We encountered three cases of psoas abscess (0.9%). One patient was
managed with ileocolic resection and immediate anastomosis, while in two patients
a percutaneous drainage was first performed and then, after 12 days of total
parenteral nutrition, a resection of the diseased bowel with immediate
reconstruction was carried out.
CONCLUSIONS: A correction of the nutritional deficiencies is mandatory.
Percutaneous computed-tomography guided drainage of the abscess with intestinal
resection with immediate anastomosis, performed after a parenteral
hyperalimentation, should be the method of choice in the management of such
patients
Traumatic complete transsection of the left hepatic duct: Another approach to repair
No full textI.F.= 0.51
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