1,722,700 research outputs found
Optical exciton molecules in three-dimensional Kerr-nonlinear photonic crystals
No full textThree-dimensional Kerr-nonlinear photonic crystals support a new kind of quantum gap solitons. Such SD-quantum gap solitons are described by an approximate Bethe-ansatz solution of the quantized nonlinear-field Hamiltonian under the effective mass approximation. 'Their main manifestations are predicted: (i) a series of discrete transmission peaks in the band gap, which progresses linearly with the diphoton number; (ii) Bessel-function dependence of the intensity correlation function on the detector separation.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000077610900007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)1ARTICLE4517-5223
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
Metabolomics in Nutritional Metabolism, Obesity, and Diabetes
No full textThe authors thank all the volunteers who participated in these studies. They also gratefully acknowledge colleagues at Hasselt University, Jessa Hospital and University Biobank Limburg for their contributions. This work was supported by a grant from ZonMW/JPI HDHL Intestinal Microbiomics (grant 50-52905-98-599) and by Hasselt University and the Research Foundation Flanders (FWO Vlaanderen; Hercules project AUHL/15/2- GOH3816N)
Metabolomics in Nutritional Metabolism, Obesity, and Diabetes
No full textThe authors thank all the volunteers who participated in these studies. They also gratefully acknowledge colleagues at Hasselt University, Jessa Hospital and University Biobank Limburg for their contributions. This work was supported by a grant from ZonMW/JPI HDHL Intestinal Microbiomics (grant 50-52905-98-599) and by Hasselt University and the Research Foundation Flanders (FWO Vlaanderen; Hercules project AUHL/15/2- GOH3816N)
Self-concept clarity lays the foundation for self-continuity: the restorative function of autobiographical memory
No full textThe current research concerns the relations among self-concept clarity, autobiographic memory, and self-continuity. We hypothesized, and tested in seven studies, that low self-concept clarity would disrupt self-continuity, but resorting to autobiographic memory would counter this disruption, thus restoring self-continuity. In Studies 1-2, low or threatened self-concept clarity was associated with decreased, or led to a decrease of, self-continuity. In Study 3, participants low (vs. high) in self-concept clarity manifested a stronger preference for an autobiographical memory task (but not for a control task). In Study 4, a suppressed mediational model of autobiographical memory received empirical backing: Threatened self-concept clarity decreased self-continuity, but also increased the propensity to evoke autobiographical memory, which fostered self-continuity. By manipulating autobiographical memory in different ways, Studies 5-7 provided additional direct evidence for the capacity of autobiographical memory to restore self-continuity. Taken together, the results converge in support of the hypothesis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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