1,720,957 research outputs found
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
The Fattened Davis Complex and the Weighted L^2-(Co)Homology of Coxeter Groups
Full text linkAssociated to a Coxeter system there is a contractible simplicial complex called the Davis complex on which acts properly and cocompactly by reflections. Given a positive real multiparameter \Q indexed by , one can define the weighted --(co)homology groups of and associate to them a nonnegative real number called the weighted --Betti number. Unfortunately, not much is known about the behavior of these groups when \Q lies outside a certain restricted range, and weighted --Betti numbers have proven difficult to compute. We propose a program to compute the weighted --(co)homology of by introducing a thickened version of this complex which we call the fattened Davis complex. A salient feature of this complex is that our construction produces a homology manifold with boundary possessing as a --equivariant retract. This allows us to use many standard algebraic topology tools such as Poincar\\u27{e} duality for computing the --(co)homology of , and we successfully perform computations for many examples of Coxeter groups.
Within the spectrum of weighted --(co)homology there is a conjecture of interest called the Weighted Singer Conjecture. The conjecture claims that if is an --manifold (equivalently, the nerve of the corresponding Coxeter group is an --sphere), then the weighted --(co)homology groups of vanish above dimension whenever \Q\leq\mathbf{1}. We present a proof of the conjecture in dimension three that encompasses all but nine Coxeter groups. Then, under some restrictions on the nerve of the Coxeter group, we obtain partial results whenever (in particular, the conjecture holds for if the nerve of the corresponding Coxeter group is a flag complex). We also prove a version of this conjecture in dimensions three and four whenever is a manifold with (nonempty) boundary, and then extend our results in dimension four to prove a general version of the conjecture for the case where the nerve of the Coxeter group is assumed to be a flag triangulation of a --manifold
The Fattened Davis Complex and the Weighted L^2-(Co)Homology of Coxeter Groups
No full textAssociated to a Coxeter system there is a contractible simplicial complex called the Davis complex on which acts properly and cocompactly by reflections. Given a positive real multiparameter \Q indexed by , one can define the weighted --(co)homology groups of and associate to them a nonnegative real number called the weighted --Betti number. Unfortunately, not much is known about the behavior of these groups when \Q lies outside a certain restricted range, and weighted --Betti numbers have proven difficult to compute. We propose a program to compute the weighted --(co)homology of by introducing a thickened version of this complex which we call the fattened Davis complex. A salient feature of this complex is that our construction produces a homology manifold with boundary possessing as a --equivariant retract. This allows us to use many standard algebraic topology tools such as Poincar\'{e} duality for computing the --(co)homology of , and we successfully perform computations for many examples of Coxeter groups. Within the spectrum of weighted --(co)homology there is a conjecture of interest called the Weighted Singer Conjecture. The conjecture claims that if is an --manifold (equivalently, the nerve of the corresponding Coxeter group is an --sphere), then the weighted --(co)homology groups of vanish above dimension whenever \Q\leq\mathbf{1}. We present a proof of the conjecture in dimension three that encompasses all but nine Coxeter groups. Then, under some restrictions on the nerve of the Coxeter group, we obtain partial results whenever (in particular, the conjecture holds for if the nerve of the corresponding Coxeter group is a flag complex). We also prove a version of this conjecture in dimensions three and four whenever is a manifold with (nonempty) boundary, and then extend our results in dimension four to prove a general version of the conjecture for the case where the nerve of the Coxeter group is assumed to be a flag triangulation of a --manifold
Reflective Homework System in Mathematics Courses
Full text linkReflective and formative assessments are commonly used in both K-12 and higher education but are less common in university mathematics courses. In fact, much of mathematics education seems to be heavily reliant on summative assessments. In this article, we introduce a formative assessment in the frame of a reflective homework system that can be modified and implemented across the mathematics curriculum. We then report on a survey that we administered in the traditional university undergraduate calculus sequence that we designed to measure student attitude and perception of this reflective assessment. We hope that this study encourages faculty at other institutions to implement such assessments in their mathematics courses
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
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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