1,721,059 research outputs found
Influence of Joule Heating and Heat Source on Radiative MHD Flow over a Stretching Porous Sheet with Power-Law Heat Flux
No full textIn this paper, a detailed investigation on MHD flow over a porous stretching sheet was conducted by taking power-law heat flux and heat source into account. Series solutions are achieved for the reduced nondimensional ordinary differential equations by admitting an analytical technique known as a homotopy analysis method (HAM). A precise way of convergence of series solutions is also furnished. The attained results of the present study are in excellent connection with the previous results. Nature of magnetic parameter, permeability parameter, radiation parameter, Prandtl number, Eckert number, heat generation parameter and suction/injection parameters on velocity, temperature, skin friction coefficient and Nusselt number are presented in tables and graphs
Effects of Slip and Radiation on Convective MHD Casson Nanofluid Flow over a Stretching Sheet Influenced by Variable Viscosity
No full textAbstract: The aim of the present investigation is framing the effect of thermalradiation and slip on a magnetohydrodynamic (MHD) Casson nanofluid flowover a stretching surface under the influence of variable viscosity andconvective boundary condition. First, non-dimensionally developedboundary layer equations are deduced with suitable transformations. Thenthey are solved numerically by the Runge–Kutta–Fehlberg method with theshooting technique for different values of parameters. The most relevantresult of the present study is the fact that the augmented magneticfield strength, Casson fluid parameter, and the inclined angle underminethe flow velocity, establishing thinner hydrodynamics boundary layer,while the thermal slip and radiation parameters show the opposite trend.Another most important outcome is the fact that increase in the Prandtlnumber, radiation, viscosity, thermal slip, and radiation upsurges thefluid temperature, leading to improvement in the thermal boundary layer.The effects of different natural parameters on the skin frictioncoefficient and the Nusselt and Sherwood numbers are examinedgraphically. For a limiting case of the present model, the obtainedsolution was found to be in excellent agreement with the existingliterature
A Study of Thermally Radiant Williamson Nanofluid Over an Exponentially Elongating Sheet with Chemical Reaction Via Homotopy Analysis Method
No full text
Analytical Modeling of Heat and Mass Transfer of Radiative MHD Casson Fluid over an Exponentially Permeable Stretching Sheet with Chemical Reaction
No full textAbstract: Aspire of this study is to study the effect of heat source,suction/injection, and chemical reaction on dissipative and radiativeMHD flow of a Casson fluid over an exponentially permeable stretchingsheet. Series solutions are obtained for converted non-dimensionalordinary differential equations using an analytical technique known asthe homotopy analysis method (HAM). A decisive approach of convergenceof series solutions is also furnished. The acquired results are inexcellent correlation with the previous results. The nature of differentparameters like the magnetic parameter, exponential parameter,suction/injection parameter, the Casson parameter, radiation parameter,the Prandtl number, the Eckert number, heat source parameter, Schmidtnumber, and chemical reaction parameter are discussed using tables andgraphs
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
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