1,721,251 research outputs found
La prevenzione dei rischi dei lavoratori derivanti dall'uso di chemioterapici antiblastici in ambiente sanitario
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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
Donor organ preservation in high-risk cardiac transplantation.
No full textAIM: To evaluate safety and efficacy of blood cardioplegia in a retrospective selected (but not randomized) donor/recipient population as standard organ preservation technique in high-risk heart transplants (HTX). MATERIALS AND METHODS: The rationale of different strategies was based on both donor and recipient evaluations. Unstable donors with a long history of well-known risk factors and/or long-distance retrieval were given blood cardioplegia, particularly for HTX candidates in poor preoperative clinical condition. Organ protection was performed by administration of St Thomas II crystalloid cardioplegia in 74 patients (group 1) while 58 others (group 2) received blood cardioplegia. RESULTS: Groups I versus II shows comparable results for immediate postoperative mortality rates (4% vs 7%, P =.4), high doses of inotropic drug support (48% vs 20%, P =.08), and the need for postoperative mechanical assistance devices (9% vs 4.5%, P =.4). In contrast statistically significant differences were observed for occurrence of acute right ventricular failure (50% vs 5%; P =.004), atrioventricular conduction disturbances (63% vs 10%, P =.003), spontaneous sinus rhythm recovery (18% vs 64% P =.0038) and reperfusion interval (RI) (time between removal of aortic cross-clamp and discontinuation of extracorporeal circulation (ECC)) exceeding 30 minutes (70% vs 21%, P =.0004). Higher peak creatine kinase MB mean value (176 +/- 23 vs 90 +/- 19, P =.06) indicated more severe ischemic damage among G1 patients. CONCLUSION: This study suggests that high-risk heart transplant candidates benefit from blood cardioplegia, due to the reduced incidence of both right ventricular failure and severe cardiac arrhythmia. Potential limitations to this novel technique may be linked to the higher expenses due to the need for a perfusion technician. Improved myocardial protection can be seen even in a longitudinal study on chronic rejection: this form of allograft protection may preserve the matrix and the endothelium
Assessment of the potential of biomass: A new method for the planning of sustainable energy [La valutazione del potenziale da biomassa: Una nuova metodologia per una pianificazione energetica sostenibile]
No full textThe sources of renewable energy can represent an engine of local development, It is therefore necessary to prepare a planning which is sustainable, attentive to the environmental frameworks, landscapes and social standards and, at the same time, capable of evaluating the potential energy of the territory. The present work using a methodology that takes into account territorial vocations aims at evaluating the potential from biomass with the aid of the latest generation of software (agrires) in order to offer an exemplification of sustainable energy planning, in a marginal territory, such as the inland hills of northern Campania in the province of Caserta, on the border with Lazio, economically disadvantaged and fragile from a social point of view. © FrancoAngeli
La transizione energetica come paradigma di sviluppo sostenibile. Un caso di studio nella collina interna della Campania settentrionale
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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
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