1,721,660 research outputs found
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
Estimation of the gravitational wave polarizations from a nontemplate search
Full text linkGravitational wave astronomy is just beginning, after the recent success of the four direct detections of binary black hole (BBH) mergers and the first observation from a binary neutron star inspiral, with the expectation of many more events to come. Given the possibility to detect waves from not exactly modeled astrophysical processes, it is fundamental to be ready to calculate the polarization waveforms in the case of searches using nontemplate algorithms. In such a case, the waveform polarizations are the only quantities that contain direct information about the generating process. We present the performance of a new valuable tool to estimate the inverse solution of gravitational wave transient signals, starting from the analysis of the signal properties of a nontemplate algorithm that is open to a wider class of gravitational signals not covered by template algorithms. We highlight the contributions to the wave polarization associated with the detector response, the sky localization, and the polarization angle of the source. In this paper we present the performances of such a method and its implications by using two main classes of transient signals, resembling the limiting case for most simple and complicated morphologies. The performances are encouraging for the tested waveforms: the correlation between the original and the reconstructed waveforms spans from better than 80% for simple morphologies to better than 50% for complicated ones. For a nontemplate search these results can be considered satisfactory to reconstruct the astrophysical progenitor
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
Wave crest properties and non-linearities of storm waves measured at three sites in the Mediterranean sea
No full textLa visita domiciliare per gli studi di coppia per l'adozione nazionale e internazionale
No full textLa visita domiciliare all’interno dell’indagine di coppia per l’adozione è uno degli strumenti di analisi della capacità dei coniugi di accogliere e curare il futuro figlio adottivo. Durante la visita alla casa di famiglia vengono, infatti, raccolte informazioni capaci di integrare e/o spiegare quanto raccolto nei colloqui individuali e di coppia. Attraverso l’analisi narrativa delle interviste condotte alle assistenti sociali di alcune Équipe Adozioni del territorio veneto, in merito all’utilizzo della visita domiciliare in questo specifico ambito del lavoro sociale, è stato possibile rilevare gli aspetti di somiglianza, pur in assenza di specifiche linee guida, ma anche la non piena attuazione delle potenzialità di questo strumento nella lettura dei contesti
Numerical simulations of subaqueous bipartite gravity flows
No full textLarge mass gravity flows are characterized by bipartite flows: a basal very dense laminar flow having Bingham fluid characteristics and an overlaying turbulent flow. In a first phase the turbulent flow is generated and dragged by the basal dense flow, then it continues to flow independently over very long distances after the basal flow has come to rest. The physical modelling of such complex phenomenon has been approached with the development of two coupled models, one for the basal dense flow, the other for the turbulent flow. The present paper briefly describes the coupled models and illustrates the results of their application to simulate outcropping ancient events
The modelling of short waves in shallow waters. Comparison of numerical models based on Boussinesq and Serre equation.
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