1,720,957 research outputs found
Nonlinear seismic analysis of innovative steel and concrete hybrid coupled shear walls in OpenSees
No full textAn innovative hybrid coupled shear wall (HCSW) system made of a reinforced concrete wall coupled to steel side columns by means of steel links is studied. This structural solution is conceived to exploit both the stiffness of reinforced concrete elements, necessary to limit building damage under low-intensity earthquakes, and the ductility of steel elements, necessary to dissipate energy under medium- and high-intensity earthquakes, limiting the seismic damage to the link elements that can be easily substituted. A number of case studies are designed and their seismic behaviour assessed through multi-record nonlinear incremental dynamic analysis. Details of the finite element models developed in OpenSees are provided and discussed, including their validation against experimental tests. A selection of results is shown to highlight the potentialities of the proposed innovative HCSW systems and the possibility to develop a ductile behaviour where plastic deformation are attained in the steel links before yielding in the reinforced concrete wall
Influence of axial loads and higher order modes on the seismic response of slender bridge piers
No full textSeismic performance of innovative steel and concrete hybrid coupled shear walls
No full textSteel and concrete hybrid systems are obtained through a combination in series of steel elements and reinforced concrete elements with the aim of exploiting at their best the potentialities of each material. This concept differentiates steel and concrete hybrid structures from steel and concrete composite structures, where steel and concrete are working in parallel in the same structural element, e.g. concrete filled hollows steel columns and steel profiles embedded in reinforced concrete elements. In this work the seismic behaviour of an innovative hybrid coupled shear wall (HCSW) system, developed in the European research project INNO-HYCO (INNOvative HYbrid and COmposite steel-concrete structural solutions for building in seismic area), is investigated. Such earthquake resistant solution is composed by a reinforced concrete wall coupled to steel side columns by means of steel links with the objective to exploit both the stiffness of reinforced concrete wall, necessary to limit building damage under low-intensity earthquakes, and the ductility of steel links, necessary to dissipate energy under medium- and high-intensity earthquakes. The seismic behaviour of the system is assessed through multi-record nonlinear incremental dynamic analysis (IDA). For this purpose, first a set of realistic case studies is designed, then a finite element model is developed into the platform OpenSees and validated through comparisons against experimental tests including local and global responses quantities. The outcomes of the numerical analyses show that the proposed innovative system is actually able to effectively dissipate the energy through the activation of the inelastic behaviour of the steel links before yielding in the reinforced concrete wall
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
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
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