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Traditional and Innovative Techniques for the Seismic Strengthening of Barrel Vaulted Structures Subjected to Rocking of the Abutments
No full textProportioning criteria for traditional and innovative Extrados techniques for the strenghtening of barrel vaulted structures subjected to rocking of the abutments
No full textTraditional and innovative techniques for the seismic strengthening of barrel vaulted structures subjected to rocking of the abutments
No full textBehavior and retrofitting of single-leaf vaults under distributed horizontal forces
No full textIn this paper, the seismic vulnerability of single-leaf vaults undergoing horizontal actions is discussed, and an innovative strengthening technique is proposed. The extreme vulnerability of these structures was frequently assessed after recent earthquakes, when a significant number of single-leaf vaults collapsed, regardless of the earthquake intensity and of the level of the structure global damage; and highlights the need for structural strengthening interventions. In this paper, the vault seismic vulnerability is discussed based on the results of an experimental study on the behaviour of a single-leaf vault subjected to cyclic unsymmetrical loads. A special testing bench is adopted, which allows tilting the specimen both clockwise and counter-clockwise. In the tilted position, each vault segment is subjected to both relative vertical and horizontal forces, corresponding to the gravity load force components evaluated along and normal to the tilted axis. The resulting load distribution simulates the seismic action acting on the vault ring. Furthermore, lightweight ribs are proposed as an innovative solution to upgrade the seismic performance of existing single-leaf vaults. Ribs can be designed to behave like external retaining structure, preserving the vault shape by constraining the uplift deflection in the case of unsymmetrical load conditions. Further experimental tests will assess the efficiency of the proposed lightweight rib reinforcement solution, and clarify the role of the reinforcement-to-vault connection
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Proportioning criteria for traditional and innovative Extrados techniques for the strenghtening of barrel vaulted structures subjected to rocking of the abutments.
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