1,721,128 research outputs found
Inferring the essentiality of different mutations of Saccharomyces Cerevisiae from the position of the corresponding enzymes in the metabolic network
No full textImprovement in mild soil steaming using exothermic reactions: temeprature evaluation and sclerotia viability
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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
AN INTRODUCTION TO RECURENCE QUANTIFICATION ANALYSIS OF CLICK-EVOKED OTOACOUSTIC EMISSIONS. A
No full textVariations 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
Special factors in Biological strings
No full textBiological macromolecules such as DNA, RNA, and proteins can be regarded as finite sequences of symbols (or words) over a finite alphabet. In this paper, we refer to DNA (RNA) sequences which are words on a four-letter alphabet. A comparison is made between some “genes”, or fragments of them, with random sequences or random reshuffled sequences on the same alphabet and having the same length. Some combinatorial techniques of analysis of finite words are developed. A crucial role in the comparison is played by the so-called special factors of a given word. In all the analysed DNA (RNA) fragments the distribution on the length of the number of right (left) special factors differs, in a very typical way, from the corresponding distribution in a string on the same alphabet and having the same length generated by a random source or obtained by making a random alteration (=shuffling) of the original string. This kind of change is irrespective of the length in the range that we have considered <2650 bp and of the phylogenetic origin of the fragment
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