1,721,004 research outputs found
Epidemiologia degli infortuni e delle malattie professionali tra i lavoratori dell’area portuale di Ancona
No full textInfortuni lavorativi nell’area portuale di Ancona: dimensioni e caratteristiche principali del fenomeno
No full textCardiac troponin I as prognostic marker in heart failure patients discharged from emergency department
No full textDespite evidence that cardiac troponin I (cTnI) identifies patients with advanced heart failure (HF) at risk of death, data on heterogeneous HF populations are scarce. Our purpose was to verify and analyze the prognostic role of cTnI in acute HF patients admitted to the emergency department. This was an observational longitudinal prospective study carried out in an urban hospital. We studied 99 patients discharged from the department between March and December 2002 with a HF diagnosis and samples of cTnI. Patients with acute coronary syndromes, myocarditis or renal failure were excluded. The main outcome was death from any cause. The detection level of the cTnI assay was 0.05 ng/ml. cTnI was detected in 45.5% of HF patients. These patients had a higher NYHA class (P<0.001) at initial presentation and longer hospitalization (P=0.004) than cTnI-negative patients. Nineteen deaths occurred during the study: 17 for HF and 2 for acute coronary syndrome. Finally, detectable cTnI was associated with increased mortality risk (RR 4.7; 95% CI 1.3-17.1; P=0.021) also after adjustment for other adverse prognosis factors (age, NYHA class and presence of relapses). Our HF cTnI-positive patients had a worse clinical presentation and longer hospitalization. cTnI is a significant independent predictor of death and of longer hospitalization. It could be used for the early identification of HF patients at an increased risk of death in the long term, and of longer hospitalization. Thus, cTnI can aid decision-making and clinical management in the emergency department
Treatment of rectal adenomas by transanal endoscopic microsurgery: 15 years' experience.
No full textBACKGROUND: The authors present their experience with rectal adenomas managed by transanal endoscopic microsurgery (TEM). The goals of this study were to examine our institution's experience by evaluating surgical morbidity, mortality, and local recurrence rate. METHODS: This retrospective study investigated 402 patients who underwent TEM a for preoperative diagnosis of adenoma from January 1993 to October 2008. The mean age was 65 years (range = 22-92 years). All patients were regularly followed up to determine treatment efficacy in terms of local recurrence rate. RESULTS: No 30-day perioperative mortality occurred. No conversion to laparoscopic or open procedures was reported. Minor complications occurred in 28 (7%) patients, whereas major complications were found only in 2 (0.5%) patients. Definitive histology confirmed adenomas in 366 cases (91%). At a mean follow-up of 84 months (range = 1-190 months), 16 (4%) adenomas recurred and were successfully retreated by TEM [14 cases (87.5%)] and by conventional surgery [2 patients (12.5%)]. No further recurrences were observed at subsequent follow-up. CONCLUSION: The findings warrant the conclusion that TEM is a safe, effective treatment for rectal adenomas where endoscopic removal is not applicable and has low morbidity and no mortalit
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
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