1,720,962 research outputs found
Seismic vulnerability assessment of masonry buildings in a region of moderate seismicity
No full textTo assess the seismic vulnerability of masonry buildings is largely matter of personal feeling and experience especially when dealing with old houses made of heterogeneous materials and without a plan. One way to predict their resistance to earthquake forces is the experience on models put on a shaking table. Costs and scaling problems, particularly severe for stone walls, are limiting factors in the extensive use of this technique. After the Friuli 1976 earthquake, the regional government arranged a detailed survey of damages suffered by buildings to be repaired. These data organised in the FRED (Friuli Earthquake Database) make it possible to compare, on a statistically significant basis, the a priori vulnerability with the effective damage. One further step towards the practical use of the results is given by characterising the relevant features of the buildings with the same parameters which can be found in the General Census periodically produced by the Italian Statistical Institute (ISTAT)
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
A definition of seismic vulnerability on regional scale: the structural typology as a significant parameter
No full textIn this work a criterion is presented to evaluate the seismic vulnerability on a regional scale based on an a posteriori method. This goal has been reached through the analysis of data collected after the 1976 Friuli seismic event on the base of a Regional Law (17/76) that performed a census of the damage for every building of the area struck by the earthquake. It was possible to derive the typological parameters able to define a degree of vulnerability. To this purpose the original database has been reorganized and processed, in particular to assess the quality of the information. This was done by comparing the earthquake intensity as computed on the base of the judgements given in the forms with the published isoseismal maps. After having characterized the building typologies and the associated vulnerability classes, we statistically evaluated the differences in their behaviour under seismic action. The parameters used are present both in the rich damage assessment forms filled in after the 1976 earthquake, and in the poorer census carried out by ISTAT every 10 years. Six significantly different typological classes were selected; these, once mapped to vulnerability classes, highlight the most vulnerable typologies. The following step is a vulnerability map for the Friuli-Venezia Giulia region at different detail degrees. At the most detailed level, vulnerability evaluation is based on the availability of information for each building or structural aggregate. At the other end, a coarse, less detailed vulnerability map only requires statistical data that identify the structural behaviour for different building typologies. The application of GIS techniques allows the integration of these data with other geographical and geophysical information. © 2001 OGS
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
A definition of seismic vulnerability on a regional scale: the structural typology as significative parameter
No full text
- …
