1,720,958 research outputs found
Equivalent frame modelling of an unreinforced masonry building in finite element environment
No full textEquivalent frame method (EFM) is a viable modelling option for global seismic analysis of masonry buildings in comparison to more refined techniques, such as finite elements (FE), especially in professional practice [1–3]. EFM takes advantage of a building’s geometric regularity, both in plan and elevation, as well as of the good quality of masonry and floors stiffness, as required for the activation of box-like behaviour under seismic loads. However, typical vulnerabilities in existing unreinforced masonry (URM) buildings, e.g. highly flexible floors, openings too close one another, poor quality masonry, isolated pillars or non-vertically aligned walls, limit the effectiveness of EFM application. Recently, many studies have been devoted to expanding the possibilities of applying EFM to buildings which do not meet box-behaviour hypotheses [4–6]. The paper describes the procedure for implementing an EF model of an existing URM building in Midas GEN, a FE software commonly used for design of steel and r.c. structures. The equivalent frame (piers and spandrels) consists of a system of mono-dimensional, lumped plasticity beam elements [7]. In MIDAS, the frame is defined by the user, who also have to control the modelling process, by using the theoretical criteria available [8–10] and adapting their results to a building’s characteristics. Therefore, some peculiar vulnerabilities of the original building may be specifically implemented, thus obtaining a more refined model. The case study is Palazzo Carraro, a cultural heritage building, located close to the old town of Noale (Venezia). The palace complies with the main requirements of EFM except for floors stiffness, although horizontal connections may be considered sufficient at this level of analysis. Pro and cons of the specific procedure are here discussed, also referring to other state-of-the-art techniques, such as continuum models [11] implemented through the DIANA FEA code. Finally, the work explores the response of the EF model to different modelling choices, but also its reliability in overall analyses
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
Evaluation of the effect of compatible interventions applied to horizontal components of URM buildings with EFM and FEM models. The case of palazzo carraro in Noale (Italy)
No full textURM buildings suffer generally of their weak vertical structure and absence of horizontal connections between the walls. Nevertheless, traditional building practice in Veneto plains, where poor soil conditions are extremely common, required to build very deformable and lightweight houses to adapt to differential foundation settlement. Such peculiar features must be considered in the restoration and adaption to present safety criteria of those buildings. Therefore, 'improvement' interventions as defined by Italian technical standards, rather than structural retrofitting, seems to be more appropriated for reducing both, the alteration of the seismic behavior and the structural weight on foundations. Thanks to the regularity, both in plan and in elevation, of this set of buildings, equivalent frame modeling (EFM) is a viable way to perform global analysis if compared to the complexities of a continuum finite element model (FEM). In the paper, two software will be used for the implementation of the EF model, i.e., TRE Muri and Midas GEN, and their results will be compared with a continuum FE model built with DIANA FEA. In the three models, global seismic behavior through pushover analyses, as the building is and after interventions, is explored. Structural interventions are intentionally limited to horizontal structures stiffening. The case study is represented by a medium sized building placed just outside the old town of Noale, in the metropolitan district of Venice (Italy), dating back to the XVII cent
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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