1,720,972 research outputs found
Influence of the tethering system on the seismic response of submerged floating structures (SFT)
No full textpaper N 287, 9 pp., contributo su C
Effects of the anchoring systems on the dynamic behaviour of the submerged floating structures (SFT)
No full textSommario su volume (pp. 260-261). Allegata memoria su CD (ST6.1, 12 pp.
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
Multi-support seismic input and response of submergedfloating tunnels anchored by cables
No full textThe modeling and seismic analysis of Submerged Floating Tunnels moored by cables is addressed with particular attention to spatial variability of the excitation.
A uniformly modulated random process is deemed adequate to model the spatial variability of the seismic input for the given structure. A novel method to obtain response spectrum compatible accelerograms is proposed, that is based on the explicit expression of the median pseudo-acceleration response spectrum induced by the adopted power density function (PSD), which is then used to identify the parameters of the PSD function that minimize the difference with the elastic response spectrum prescribed by EN 1998. The minimization process is discussed and parameters for the PSD spectra are obtained. Samples of the free-field motion are then generated using a proved and theoretically sound approach and reach a satisfactory agreement with the prescribed response spectra.
To model the cables, a 3 node isoparametric cable element, formulated in the coordinates of the dynamic model, is enriched, by including hydrodynamic loading, within a numerical procedure for the dynamic time domain step-by-step analysis of non-linear discretized systems. Cables discretization and dissipation modeling issues are addressed.
An example of application is shown, that makes reference to the bed profile of Qiandao Lake (People’s Republic of China), where the first SFT prototype should be built; additional analyses tend to assess the sensitivity to soil parameters
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
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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