1,720,991 research outputs found
La «Memoria de quatuordeci valentissimi homini romani» dans le commentaire sur la «Comédie» du “Falso Boccaccio” (1375)
No full textNell'articolo è edito ed esaminato un insolito catalogo di romani illustri contenuto nel commento dantesco del cosiddetto Falso Boccaccio
Determination of discrete element method (DEM) simulation parameters for polymeric waste particles
No full textPlastic consumption is on the rise, particularly in Europe, where million tonnes are produced each year, with only 10% recovered. Optimizing the recycling processes in all its phases is vital. Understanding particle movement in some components of the plastic recycling plants can be addressed by the Discrete Element Method (DEM). The characterization of DEM materials is often performed through the study of the angle of repose (AoR). This study aims to advance DEM simulation of shredded polymeric waste, proposing a scaling and calibration procedure of the relevant simulation parameters. A total of six distinct types of polymeric particles, with different shape and size, have been characterized in this study, measuring their density, their shape estimators, their size distribution and their angle of repose. The AoR has been measured through a hollow cylinder lifting test. First, sensitivity analyses have been performed to establish a suitable range for the numerical parameters and to reduce the dimensionality of the problem. Then, the scaling and calibration procedure is described and tested on the six batches. The proposed procedure allows to predict very well the AoR, with an error below 1%, and the other geometrical variables of a heap, although it deteriorates in fully predicting its shape when the sphericity of the particles decreases. Graphical Abstract: (Figure presented.
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
Effect of mepindolol on serum lipids
No full textIn view of the postulated association between plasma lipids and the development of atherosclerosis, there is growing interest in the effects of beta blockers on plasma lipids. This study was undertaken to investigate whether a nonselective beta blocker, such as mepindolol, which possesses intrinsic sympathomimetic activity, causes significant changes in serum lipids, particularly in their ditribution among the different lipoproteins. Eighteen healthy subjects, twelve males and six females, were given mepindolol orally, daily doses of 0.2 mg/kg averaging 10-15 mg. Pre- and post-treatment fasting total serum cholesterol, HDL cholesterol, LDL cholesterol, and triglycerides were evaulated; the ratio LDL cholesterol/HDL cholesterol was also calculated. Total cholesterol did not change significantly after treatment with mepindolol (- 1.9 mg%), whereas a small and nonsignificant decrease was observed in LDL cholesterol (- 6 mg%); no change was found in HDL cholesterol (- 0. mg%). Serum triglycerides showed a significant increase (+ 20.9 mg%, p less than 0.01). Thus, the most prominent effect of even a short period of treatment with mepindolol is a net increase in serum triglyceride levels. It must be remembered that high triglyceride levels do not constitute a cardiovascular risk factor. On the other hand, no significant changes in total cholesterol, HDL and LDL cholesterol, and in LDL cholesterol/HDL cholesterol ratio were observed. The results of this study show that mepindolol, unlike other beta-blocking agents, does not affect cholesterol concentration and distribution among the lipoproteins. In particular it does not reduce HDL cholesterol, which is currently assumed to be inversely related to the development of atherosclerosi
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
