1,720,967 research outputs found
Static analysis of historical reinforced masonry walls under horizontal loads
Get PDFVery often the horizontal resistance of an historical masonry building is incremented by using steel tie bars passing in the walls at the floor level. In previous works the results for the cases of the walls with thin platbands or small "panels" have been presented. This paper presents a method and some results for the case in which the masonry panels between two piers are "deep"
Some results on the strength evaluation of vaulted masonry structures
Get PDFWithin the framework of the studies on masonry structures that use the notension model for the masonry material, the paper aims to analyze the strength of some vaulted masonry structures, very frequent in the context of historical buildings. The analysis has been first focused to the case of the vertical loads, examining both the possibility of symmetric and non symmetric collapse mechanism. The effect of increasing horizontal forces has been then analyzed. Some useful results have been obtained particularly in the case of the circular and the pointed arch with abutment piers
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
Evaluation of medial meniscus tears and meniscal stability: Weight-bearing MRI vs arthroscopy
No full textTo assess the role of dedicated low-field standard and weight-bearing MRI in the evaluation of stable or
unstable tears of medial meniscus in comparison with arthroscopy.
Our series included 1750 knee MRI scans performed with a high-field MRI scanner from July 2010
to August 2011. We retrospectively reviewed and analyzed 20 MRI exams of normal knee and 57 MRI
exams of knee with clinical evidence of tears of the medial meniscus. In the same session, after conventional
1.5 T and “dedicated” 0.25 T supine MRI exam, the patients underwent weight-bearing examination
with the same dedicated MRI unit. In all cases sagittal and coronal PD-W were used. All patients underwent
arthroscopy 18–25 days after the weight-bearing MRI. In the first group, no statistically significant
anatomical modifications of shape, intensity and position of the medial meniscus between standard 1.5 T,
dedicated supine and upright MRI were observed. In group A, the images acquired in the supine position
(dedicated and 1.5 T MRI) documented in 21 cases a traumatic tear (group 2A) and in 36 cases a degenerative
tear (group 2B). In group 2A, weight-bearing MRI showed presence of unstable tear a degenerative
unstable meniscal tear only in 19 out of 36 cases. In group 2B, weight-bearing MRI showed only in 9 out
21 cases. Arthroscopy Confirmed weight-bearing MRI diagnosis in all cases.
This new approach to meniscus pathology gives an important contribution to a better management of
a diagnostic–therapeutic approach in which standard MRI has not played a key role, so far
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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