1,721,278 research outputs found
Temporal and spatial changes in sedimentation along the margins of the North Atlantic (abstract of paper presented at AGU Fall Meeting, San Francisco, 8-12 Dec 2003)
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Analysis of piston cores from Great Meteor East: report to Rijks Geologische Dienst, Haarlem, Netherlands
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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
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
The correlation of magnetic, gas dynamic and thermal effects on arc mobility in low contact velocity circuit breakers
No full textThis paper examines arc root mobility in relation to magnetic and gas dynamic forces in low contact opening velocity circuit breakers (1 m/s). Arcing conditions of interest are short circuit faults (10/sup 3/-10/sup 4/ A) in low voltage (220-380 VAC) circuit breakers. Previously published experimental results have shown how the gas flow and venting in the contact region affects the arc root mobility. In this paper the interrelation of gas dynamic and magnetic forces is investigated further by developing relationships between electromagnetic forces and high temperature gas dynamic flows. New semi-empirical modeling and experimental results are presented in terms of electrical and thermal energy transfer between the arc and the gas flow. The influences of magnetic field on the relationships between arc power, arc voltage, arc current and arc energy are discussed. The effects of heat transfer and thermal power on the gas flows in the arc chamber are explored. These effects are discussed particularly in relation to arc root motion in low contact opening velocity systems. Some features of arc root mobility, which had hitherto been anomalous, are explained. Furthermore, these are used to extend and develop models of arc root commutation. This study provides a vital step in the development of a consistent model of the arc structure and motion in miniature circuit breakers operating at low contact opening velocity
A proposal to the JOIDES Ocean Drilling Programme for drillsites relevant to the Great Meteor East HLRW study area
No full textAppropriate 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
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