1,720,963 research outputs found
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
Numerical study of convective fluid flow in porous and non-porous media.
Get PDFPh. D. University of KwaZulu-Natal, Pietermaritzburg 2015.Abstract available in PDF file
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
A Mathematical Model On The Effect Of Non-Adherence To Drugs On Diabetes Control
Get PDFPublished ArticleA compartmental mathematical model for diabetes is
developed. The model describes the dynamics of the spread of Type-
2 diabetes. A theoretical investigation in the non-adherence to drugs
is investigated. A system of differential equations is analysed by
stability analysis, the non-trivial critical point obtained is locally
asymptotically stable under the given conditions. In-host mathematical
model for glucose tolerance test (GTT) is considered, actual
glucose data values are fitted using Matlab least squares curve
fitting technique. Two methods are used to numerically compute the
distributions of steady states of diabetic sub-populations. The Gauss-
Seidel method is more accurate than the Jacobi method. The results
show that more than 50% of clinical diagnosis effort need to be
applied to have more diagnosed population than undiagnosed. Nonadherence
to drugs make the control of diabetes difficult. Other nonclinical
activities such as campaigns against unhealthy lifestyles can
help control diabetes. The GTT model show that if strict diet and
medication is followed diabetes can be controlled
A Numerical Analysis of Viscoelastic Flow Between Porous Moving Walls
Get PDFPublished ArticleA viscoelastic fluid flow between porous moving walls is studied. This study is motivated by flow of
biological fluids through veins and arteries with moving walls. Most studies in fluid flow rarely include moving
walls. A special analysis of viscoelastic fluid flow between moving walls is considered, the problem was previously
considered for Newtonian fluids which resulted in a simple fourth order differential equation. The present study
resulted in the fifth-order modified Proudman-Johnson equation. A unique partial differential equation is developed
which is then solved numerically by the Simple Iteration Method (SIM). The numerical method is newly developed
based on the fixed point theorem.The method agrees with other numerical solutions in the literature. The important
results reported are that the effect of varying viscoelastic and the drag-force parameters result in decreasing velocity
profiles for both high and low Reynolds numbers. Wall dilation and injection/suction effects affect velocity profiles
giving more understanding of the flow of biological fluids in both Newtonian and non-Newtonian fluids
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