1,721,112 research outputs found
Račun opservabli nt – nt, dd – pt i dd – dd raspršenja primjenom realističnih međudjelovanja
Get PDFThe four-body equations of Alt, Grassberger and Sandhas are solved for a system of four nucleons, using realistic NN interactions in channels 1S0, 3S1−3D1, 1P1, 3P0, 3P1 and 3P2. The results of the calculation are compared with data for the reactions dd → dd, dd → p 3H and n3H → n 3H. The calculations indicate that the nucleon-nucleon p-waves have a strong effect on 4N observables, but one finds some disagreement with data that indicates the need for a 3N force or new 2N+3N force models.Rješavaju se jednadžbe Alta, Grassbergera i Sandhasa za četiri tijela za sustav četiri nukleona uz primjenu realističnih pretpostavki o NN-međudjelovanju u kanalima 1S0, 3S1−3D1, 1P1, 3P0, 3P1 i 3P2. Ishodi računa uspoređuju se s podacima za reakcije dd → dd, dd → p 3H i n3H → n 3H. Računi pokazuju da nukleon – nukleon p-valovi snažno utječu na 4N opservable, ali neka neslaganja s podacima ukazuju na mogućnost pogreške u poznavanju stvarnih međudjelovanja
Račun opservabli nt – nt, dd – pt i dd – dd raspršenja primjenom realističnih međudjelovanja
Get PDFThe four-body equations of Alt, Grassberger and Sandhas are solved for a system of four nucleons, using realistic NN interactions in channels 1S0, 3S1−3D1, 1P1, 3P0, 3P1 and 3P2. The results of the calculation are compared with data for the reactions dd → dd, dd → p 3H and n3H → n 3H. The calculations indicate that the nucleon-nucleon p-waves have a strong effect on 4N observables, but one finds some disagreement with data that indicates the need for a 3N force or new 2N+3N force models.Rješavaju se jednadžbe Alta, Grassbergera i Sandhasa za četiri tijela za sustav četiri nukleona uz primjenu realističnih pretpostavki o NN-međudjelovanju u kanalima 1S0, 3S1−3D1, 1P1, 3P0, 3P1 i 3P2. Ishodi računa uspoređuju se s podacima za reakcije dd → dd, dd → p 3H i n3H → n 3H. Računi pokazuju da nukleon – nukleon p-valovi snažno utječu na 4N opservable, ali neka neslaganja s podacima ukazuju na mogućnost pogreške u poznavanju stvarnih međudjelovanja
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
Case-control association results.
No full text<p>Results of the Polish case-control association analysis. <sup>a</sup>Uppercase denotes the more frequent allele in the control samples, <sup>b</sup>MAF, minor allele frequency calculated from the control samples, <sup>c</sup>The order of genotypes: DD/Dd/dd (d is the minor allele), <sup>d</sup>Dominant model: dd + Dd vs DD (d is the minor allele), <sup>e</sup>Recessive model: dd vs Dd + DD (d is the minor allele).</p
Comparison of magnetic couplers for IPT-based EV charging using multi-objective optimization
No full textInductive power transfer (IPT) is becoming increasingly popular in stationary electric vehicle (EV) charging systems. In this paper, the influence of the different IPT coupler geometries on the performance factors such as efficiency, power density, misalignment tolerance, and stray field is studied. Four different coupler topologies, namely the circular, rectangular, double-D (DD-DD), and the double-D transmitter with double-D-quadrature receiver (DD-DDQ) are considered in this study. The electromagnetic behavior of the couplers is modeled using three-dimensional finite-element method, which is validated by experiments on a laboratory prototype. A multi-objective optimization (MOO) framework is developed to analyze the Pareto tradeoffs between conflicting performance metrics for the couplers. Optimization results depict that the circular topology performs best among the selected topologies regarding higher coupling coefficient, and efficiency for similar active mass and coupler area. Circular and rectangular couplers perform better than the polarized couplers like DD-DD and DD-DDQ regarding stray field exposure in both vertical and lateral direction of the coupler position in the EV. However, polarized couplers show more tolerance toward misalignment compared to circular and rectangular couplers. Thus, this study provides information regarding the specific strengths and weaknesses of different coupler topologies, which can be used during the initial design phase.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.DC systems, Energy conversion & Storag
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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