1,721,028 research outputs found
Isospin-symmetry breaking corrections for the description of triplet energy differences
Get PDFThe charge-independence breaking of the nuclear interaction is analyzed by means of energy differences
among analog states in T=1 isobaric multiplets. Data on triplet energy differences in the sd, pf, and pf5/2g shells, i.e., 18<A<66, are reproduced with very good accuracy by large-scale shell-model calculations taking
into account, aside from the Coulomb interaction, a single isotensor schematic interaction of monopole-pairing
type. It is shown that the effect on the triplet energy differences of this isospin-breaking interaction is of the
same magnitude as the Coulomb one. Moreover, its strength is the same for every single-particle orbital of the
considered model space
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
Beta-delayed (multi-)particle decay studies
No full text21 pags.; 10 figs.Here we report on beta-delayed multi-particle-breakup studies made at IGISOL to determine the nuclear structure and eventual alpha clustering in light nuclei. The experimental studies were performed in full kinematics and we will dedicate part of this article to technical details of the experiments. In particular we will discuss the breakup of excited states in 12C fed by beta decay from 12B and 12N, the study of the beta decay of 13O, as well as studies determining the neutrino spectrum of 8B. © Springer Science+Business Media B.V. 2012This work was partly financed by the Spanish Ministry of Science and Technology
under project FPA2007-62170, FPA2009-07387 and partly by the European Union under
contract EURONS JR4/DLEP (contract no. 506065).This work was partly financed by the Spanish Ministry of Science and Technology
under project FPA2007-62170, FPA2009-07387 and partly by the European Union under
contract EURONS JR4/DLEP (contract no. 506065).Peer Reviewe
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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