1,720,968 research outputs found
Isolamento sismico a grande scala per la salvaguardia del tessuto urbano nella ricostruzione post-sisma
No full textAfter a seismic event, the observation of the consequences to buildings and infrastructures always highlights
extensive damage situations in old or historical district of the hit towns. Damage depends not only on the local
amplification of the seismic action, but also on the quality of the materials and the construction technique. The
negative consequences of traditional design and construction approaches appeared in all their negative evidence in
all areas of Central Italy affected by recent seismic sequences of medium intensity (M5-M6) in 2016-17. Now the
reconstruction should solve the problem to rebuild with safety but preserving the historical aspect of buildings and
landscape. This paper proposes a particular application of the known technique of seismic isolation for the integral
seismic protection of entire urban quarter or entire small centers characterized by building of different characteristics
also significantly irregular. The adoption of seismic isolation systems at village or quarter scale involves the
construction of large floating slabs, supported by seismic isolators and/or dampers, above which to construct
buildings that can present the aesthetic and constructive characteristics of the collapsed traditional ones. These large
slabs could have the size of entire compartments (hundreds of meters on each side). Solution of ground isolation have
already been implemented in various countries to isolate complex of buildings.
The solution allows a correct interpretation of the objective to rebuild "as it was, there where it was", safeguarding
the landscape, prolonging the lifetime, and saving the expected cost. The paper illustrates a case study related to a quarter of a historic town in central Italy and shows the constructive solutions
Vertical collapse mechanisms in masonry buildings due to seismic vertical component
No full textThe acceleration histories recorded in the epicentral areas during the last earthquake in Central
Italy (2016-17) show very intense vertical components. During the post-earthquake damage assessment operations
in the epicentral areas, some damage frameworks different from those described in the literature have
been observed, with a macro-element collapse mode attributable to the action of the earthquake vertical component.
The paper presents some of these buildings characterized by the presence of horizontal cracks, by the
displacement of the highest levels, by vertical cracks in the sub-window walls. The masonry walls are undamaged
without the typical shear or flexure failure cracks and the lower levels do not show any damage. The
crack pattern and the associated collapse mechanisms cannot be included within the classic in-plane and outof-
plane mechanisms. A collapse mechanism characterized by the loss of vertical connection of entire structural
bodies is therefore hypothesized. The activation of this type of mechanism would seem to exclude the
formation of the classic collapse mechanisms on which the seismic capacity checks of the masonry structures
provided by the technical codes are based. A simplified linear kinematic analysis able to analyze the described
behavior is proposed and illustratively applied to a case study building. Criteria for the identification and verification
of the proposed mechanisms are described, with the aim to introduce the method in design codes
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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