1,721,077 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
Experimental and Computational Laboratory Astrochemistry – A Personal View
No full textThe application of surface science methodologies to problems in solid state and surface laboratory astrochemistry has seen rapid growth and considerable success over the last two decades. Driven by observational astronomy and the need to explain those observations through simulations capturing the relevant physics and chemistry, early successes of surface science are to be found in the application of temperature-programmed desorption and a little bit of chemical intuition in exploring the trapping and desorption of volatiles in icy films in hot core environments; and in the various explorations of molecular hydrogen formation on model grain and ice surfaces. These illustrate the close interaction of laboratory astrochemistry and astrochemical simulation; and within laboratory chemistry of the strong links and complementarity of experimental and computational approaches. This presentation will briefly consider two topics:(i) Wetting and de-wetting during adsorption on model grain surfaces and specifically how chemical intuition can sometimes let you down; and(ii) Spontaneous dipole orientation during icy film growth and its astrochemical impact;and how both experimental and computational laboratory astrochemical understanding contribute (or could contribute) to a deeper understanding of the chemical physics of these systems
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