1,720,955 research outputs found
Etude Du Comportement Thermique Et Hydraulique Dans Un Canal Triangulaire En Utilisant Le Nano Fluide Cu-Eau
No full textRésumé -- Le présent travail est une étude numérique de la convection forcée d’un écoulement bidimensionnel, laminaire et incompressible à travers un canal corrugué à base triangulaire en utilisant des nanoparticules métalliques Cu dispersées dans de l’eau comme fluide de base. Les équations régissant le problème (l’écoulement et le transfert de chaleur) ont été résolues en utilisant la méthode des volumes finis. Le logiciel FLUENT d’ANSYS 15.0 a été utilisé pour réaliser les simulations numériques. Ces simulations numériques ont été réalisées pour différentes valeurs du nombre de Reynolds allant de 100 jusqu'à 1000 et pour des nanoparticules métalliques de diamètre nm avec des fractions volumiques de et.Mots clés -- Ansys-Fluent, canal corrugué, convection forcée, nanoparticules métaliques, volumes finisAbstract – The present work is a numerical study of the forced convection of a two-dimensional, laminar and incompressible flow through a triangular-based corrugated channel using metallic nanoparticles dispersed in water as the base fluid. The equations governing the problem (flow and heat transfer) were solved using the finite volume method. ANSYS 15.0 FLUENT software was used to perform the numerical simulations. These numerical simulations were carried out for different values of the Reynolds number ranging from 100 to 1000 and for metallic nanoparticles of diameter nm with volume fractions of and.Keywords -- Ansys-Fluent, corrugated channel, forced convection, metallic nanoparticles, finite volume
Forced convection heat transfer performance of the turbulent flow of nanofluid (Al2O3-water) and hybrid nanofluid (Al2O3-SiO2-water) in a triangular channel
No full textA numerical study on flow characteristics and convective heat transfer of nanofluids (Al2O3-water) and hybrid nanofluids (Al2O3-SiO2-water) with volume fraction of nanoparticles equal to 0.03 and ratios in percent volume of Al2O3-SiO2 (10:90, 50:50) inside a triangular shaped channel and the diameter of the nanoparticles is equal to 30 nm, the calculations are made for an input temperature and at the level of corrugations T0=300 k and T=333 k respectively covering Reynolds numbers between 1000 and 5000. The equations governing this study are solved using the finite volume method based on the SIMPLE algorithm. The results show that the thermal performance of hybrid nanofluids in our case and our conditions exceeds that of nanofluids, the 10:90 ratio has the best performance of convective heat transfer.  
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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