1,720,966 research outputs found
Existence and nonexistence of almost-perfect autocorrelation sequences
No full textExistence and nonexistence of almost-perfect autocorrelation sequences / Alexander Pott ; Steven P. Bradley. - In: IEEE transactions on information theory. 41. 1995. S. 301-30
A multiplier theorem for projections of affine difference sets
No full textA multiplier theorem for projections of affine difference sets / Alexander Pott, Dirk Reuschling, Bernhard Schmidt. - In: Journal of statistical planning and inference. 62. 1997. S. 63-6
Impossibility of a certain cyclotomic equation with applications to difference sets
No full textImpossibility of a certain cyclotomic equation with applications to difference sets / K. T. Arasu ; A. Pott. - In: Designs and finite geometries / ed. by Dieter Jungnickel. - Boston u.a. : Kluwer Acad. Publ., 1996. - S. 23-27. - (Designs, codes and cryptography ; 8,1/2
Finite geometry and character theory
No full textDifference sets are of central interest in finite geometry and design theory. One of the main techniques to investigate abelian difference sets is a discrete version of the classical Fourier transform (i.e., character theory) in connection with algebraic number theory. This approach is described using only basic knowledge of algebra and algebraic number theory. It contains not only most of our present knowledge about abelian difference sets, but also gives applications of character theory to projective planes with quasiregular collineation groups. Therefore, the book is of interest both to geometers and mathematicians working on difference sets. Moreover, the Fourier transform is important in more applied branches of discrete mathematics such as coding theory and shift register sequences
A survey on relative difference sets
No full textA survey on relative difference sets. - In: Groups, difference sets, and the monster / ed.: K. T. Arasu ... - Berlin u.a. : de Gruyter, 1996. - S. 195-232. - (Ohio State University Mathematical Research Institute publications ; 4
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
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