1,721,092 research outputs found
CFD study of the behavior of LPG tanks exposed to forest fires
No full textForest fires represent a growing safety concern since their frequency is increasing, with severe damages to humans, environment and structures. The present work focuses on the impact of forest fires on a particular type of target: liquefied petroleum gas (LPG) tanks. A computational fluid dynamic (CFD) model was applied to simulate the response of LPG tanks of different sizes exposed to a forest fire scenario. Results are presented in terms of pressurization rates, temperature distributions and velocity fields focusing on the effects of the tank size variation on the vessel response. In particular, it is pointed out how the tank diameter greatly affects the pressurization rate, but it as a negligible effect on the wall temperature distribution. The outcomes of this work provide useful results to evaluate the possible failure conditions, thus supporting the emergency response to wildland fires
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
TRAITEMENT D'AIR CHARGE EN COV HYDROPHOBES PAR UN PROCEDE HYBRIDE : ABSORPTION – PERVAPORATION
No full textVolatile organic compounds (VOC) entail nuisances for humans and the natural environment. Increasing strict rules force the industrials to set up equipments of air treatment ofr their VOC charged effluents. This work studies the technical feasibility of an innovative hybrid process among the at present available techniques: the coupling of an absorption process and a membrane separation, pervaporation. The various aspects of this process are examined: choice of the absorbent, study of hydrodynamics and mass transfer in a packed column, separation of pollutants contained in the absorbent by pervaporation, coupling of the two processes. At the end, an analysis of the process underlines main parameters and their impact on the coupling efficiency. It is shown that hybrid process turns out feasible.Les composés organiques volatils (COV) sont source de nuisances pour l'Homme et le milieu naturel. Des réglementations de plus en plus strictes imposent d'équiper les unités industrielles d'un procédé de traitement des effluents gazeux chargés en COV lorsque cela est nécessaire. Ce travail étudie la faisabilité technique d'un procédé hybride innovant parmi les techniques actuellement disponibles : le couplage d'un procédé d'absorption et un procédé membranaire, la pervaporation. Les différents aspects de ce procédé sont examinés : choix de l'absorbant, étude de l'hydrodynamique et du transfert de matière en colonne garnie, séparation des polluants contenus dans l'absorbant par pervaporation, couplage des deux procédés. Au final, une analyse du procédé met en lumière les grandeurs influentes et leur impact sur l'efficacité du couplage. Il est montré que le procédé hybride s'avère faisable techniquement
TRAITEMENT D'AIR CHARGE EN COV HYDROPHOBES PAR UN PROCEDE HYBRIDE : ABSORPTION – PERVAPORATION
No full textVolatile organic compounds (VOC) entail nuisances for humans and the natural environment. Increasing strict rules force the industrials to set up equipments of air treatment ofr their VOC charged effluents. This work studies the technical feasibility of an innovative hybrid process among the at present available techniques: the coupling of an absorption process and a membrane separation, pervaporation. The various aspects of this process are examined: choice of the absorbent, study of hydrodynamics and mass transfer in a packed column, separation of pollutants contained in the absorbent by pervaporation, coupling of the two processes. At the end, an analysis of the process underlines main parameters and their impact on the coupling efficiency. It is shown that hybrid process turns out feasible.Les composés organiques volatils (COV) sont source de nuisances pour l'Homme et le milieu naturel. Des réglementations de plus en plus strictes imposent d'équiper les unités industrielles d'un procédé de traitement des effluents gazeux chargés en COV lorsque cela est nécessaire. Ce travail étudie la faisabilité technique d'un procédé hybride innovant parmi les techniques actuellement disponibles : le couplage d'un procédé d'absorption et un procédé membranaire, la pervaporation. Les différents aspects de ce procédé sont examinés : choix de l'absorbant, étude de l'hydrodynamique et du transfert de matière en colonne garnie, séparation des polluants contenus dans l'absorbant par pervaporation, couplage des deux procédés. Au final, une analyse du procédé met en lumière les grandeurs influentes et leur impact sur l'efficacité du couplage. Il est montré que le procédé hybride s'avère faisable techniquement
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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
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