1,721,093 research outputs found
Damping forces exerted by rarefied gas mixtures in micro-electro-mechanical system devices vibrating at high frequencies
Full text linkPROCEEDINGS OF SIMAI 2020+21: THE XV BIANNUAL CONGRESS OF SIMAI 30 August - 3 September 2021 Parma, Italy
No full textThe book collects the abstracts of the bi-annual congress of the Italian Society of Applied and Industrial Mathematics (SIMAI) held from August 30 to September 3, 2021 at the University of Parma. The Congress met together about 500 researchers from academia and industry active in the study of mathematical and numerical models as well as in their applications to industrial and real life problems. The aim of this traditional event is to stimulate interdisciplinary research in Applied Mathematics and to foster interactions of the scientific community with industry. The content of this book is made by the contributions of: 6 Plenary Speakers; 63 Minisymposia and some other individual contributions; the "Industrial Session", a special event gathering together academic and industrial representatives to work on mathematical problems encountered in Research & Development areas; "EDU-SIMAI session", the event dedicated to the relationship with Secondary Schools on the subject of applied mathematics teaching
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
Experimental study on kinetics and thermodynamics of Refuse Derived Fuel pyrolysis
No full textThe results presented in a previous study on the pyrolysis of municipal refuse derived fuel are compared in this work with those obtained for PVC and utilized to carry out a kinetic and thermodynamic study on the reactions involved in this process
Serenoa repens (Permixon) reduces intra- and postoperative complications of surgical treatments of benign prostatic hyperplasia
No full textAim. The aim of this study was to evaluate the efficacy of pre-treatment with Serenoa repens (Permixon®) in reducing intra- and postoperative complications of surgical treatments of benign prostatic hyperplasia (BPH). Methods. A total of 144 patients with BPH, who were candidates for transurethral resection of the prostate (TURP) and open prostatectomy (OP), were admitted to the study and randomized to receive either a daily pre-treatment with 320 mg of Serenoa repens, Permixon® for two months prior to surgery (G1) or to undergo surgery without any pre-treatment (G2). Preoperative and postoperative courses were carefully monitored for each patient. Results. Of the 144 patients, 24 dropped out of the trial: 10 in G1 and 14 in G2. In G1, the duration of surgery was significantly shorter than in G2 (59.8 min vs. 77.6 min, respectively; P<0.001), no intraoperative complications were observed (0% vs. 15% in the control group; P=0.001) and transfusion needs were remarkably lower (0% in G1vs. 38.33% in G2; P<0.001). The postoperative course was significantly more favorable in G1 (with a shorter duration of catheterization, 64.95 h vs. 91.7 h in G2; P<0.001). There was also a significant change in hemodynamic parameters and the length of hospitalization was significantly shorter in the pretreated group (5.92 d in G1 vs. 7.92 d in G2; P<0.001). Conclusion. These data suggest that pre-treatment with Serenoa repens before surgery (TURP or OP) for BPH is effective in reducing intra- and postoperative complications
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