1,721,281 research outputs found
Is It Possible To Measure the Lifetime of the Antineutron At Superlear
No full textA preliminary study of the possibility of measuring the neutron lifetime at the SUPERLEAR facility has been performed. The principle of the method and the crucial parameters of the measurement are described in a particular experimental setup and the results in terms of expected decay rates are reported
Production of Heavy Flavors In Nuclei At the Ares Facility
No full textThe recent proposal of the ARES facility, a single-pass electron-positron collider up to 15 GeV c.m. with high luminosity, opens the possibility of producing Λc+ (Λb)-hypernuclei by means of the charm (beauty) exchange reactions on nuclei. An estimation of the production cross-sections as well as experimental conditions and requirements are discussed
A Search For Exotic T = 2 Or T = 3/2 Meson States At Lear
No full textWe discuss particular ( {Mathematical expression} p) two-body annihilation reactions as a tool to search for exotic meson resonances presumably described in terms of (2q {Mathematical expression}) configurations. These reactions may be studied within the comprehensive program of the OBELIX spectrometer at LEAR
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
On the neutron emission from the Ti/D system
No full textThe results of a set of measurements of neutron emission from D(2) gas loaded Ti (metallic and sponge) at different initial values of the D/Ti ratio are reported. The D/Ti system was submitted to thermal cycles in order to pass through phase transitions. We observed no neutron emission with an upper limit of 0.05 neutrons s(-1)g(-1)(1 sigma level), in four series of measurements, whereas in two series we observed a neutron emission at a similar to 2 sigma level
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