1,721,017 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
Gestioni commissariali e governo del sistema: i nodi irrisolti
No full textL'articolo analizza le problematiche attuali del modello dei cd. piani di rientro nel settore sanitario e delle relative gestioni commissariali, collocandolo nel contesto dell'attuazione del federalismo fiscal
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
Descrizione di una tecnica di trapianto omologo di fegato nel cane, con ischemia non superiore a cinque minuti
No full textGallstones in cirrhotics revisited by a laparoscopic view
No full textSurgical literature around 1980 has emphasized the technical challenge and the risks of cholecystectomy in cirrhotic patients reporting discouraging results. The aim of this study is the retrospective analysis of laparoscopic cholecystectomy in cirrhotics. The collected laparoscopic experience of 3 surgical groups for the last 5 years is reported. Cirrhotics were classified according to Child-Pugh criteria. Postoperative complications were classified using Clavien's rules. Forty patients were recruited; 31 received successful laparoscopic cholecystectomy. Liver cirrhosis was preoperatively diagnosed in all Child-Pugh B (n = 11) and in 11/20 Child-Pugh A patients. Compared with 989 noncirrhotics undergoing laparoscopic cholecystectomy, cirrhotics were similar in terms of age (59.9+/-10.3 vs. 58.1+/-10.9) and sex (male: 51.6% vs. 50.1%). Acute cholecystitis has a similar frequence in cirrhotics and noncirrhotics (3.2% vs. 4.1%, respectively). Bile duct stones and acute pancreatitis were significantly more frequent in cirrhotic patients (6.4% vs. 3.7%, p < 0.001; and 6.4% vs. 0.3%, p < 0.001, respectively). Endoscopic papillotomy and stone extraction combined with laparoscopic cholecystectomy was performed in 2 patients. Intraoperatively, technical problems occurred in 5 (16.1%) patients: liver bed bleeding (n = 4) was significatively more frequent in cirrhotics vs. noncirrhotics (p < 0.001). Mean operative time was 90 min, range 50-180, and it was not significantly longer than in noncirrhotics (85 min, range 30-200). Conversion rate was also similar (3%). Seven patients presented 8 postoperative complications (Class II): right side lung effusion (n = 2), ascites (n = 2), temporary worsening of Child-Pugh status (n = 2), hyperosmotic coma (n = 1), and umbilical hernia (n = 1). Mean hospital stay in noncomplicated cases was the same for noncirrhotics (3+/-1). The authors suggest a more liberal use of laparoscopic cholecystectomy for symptomatic gallstones in selected Child-Pugh A and B patients
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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