1,720,955 research outputs found
A proof of the linearity conjecture for k-blocking sets in PG(n, p(3)), p prime
No full textIn this paper, we show that a small minimal -blocking set in \PG(n,q^3), , , prime, , intersecting every -space in points, is linear. As a corollary, this result shows that all small minimal -blocking sets in \PG(n,p^3), prime, , are -linear, proving the linearity conjecture (see \cite{sziklai}) in the case \PG(n,p^3), prime,
On the code generated by the incidence matrix of points and hyperplanes in PG(n,q) and its dual
No full textIn this paper, we study the -ary linear code , , prime, , generated by the incidence matrix of points and hyperplanes of a Desarguesian projective space , and its dual code. We link the codewords of small weight of this code to blocking sets with respect to lines in and we exclude all possible codewords arising from small linear
blocking sets.
We also look at the dual code of and we prove that finding the minimum weight of the
dual code can be reduced to finding the minimum
weight of the dual code of points and lines in . We present an improved upper
bound on this minimum weight and show that we can drop the divisibility condition on the weight of the codewords in Sachar's lower bound \cite{sachar}
An empty interval in the spectrum of small weight codewords in the code from points and k-spaces of PG(n, q)
Full text linkLet \C(n,q) be the -ary linear code defined by the incidence matrix of points and -spaces in \PG(n,q), , prime, . In this paper, we show that there are no codewords of weight in in \C(n,q)\setminus\mathrm{C}_{n-k}(n,q)^\bot which implies that there are no codewords with this weight in \C(n,q)\setminus \C(n,q)^{\bot} if . In particular, for the code of points and hyperplanes of \PG(n,q), we exclude all codewords in with weight in . This latter result implies a sharp bound on the weight of small weight codewords of , a result which was previously only known for general dimension for prime and , with prime, , and in the case , for ,
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
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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