1,720,986 research outputs found
Debonding strength and anchorage devices for reinforced concrete elements strengthened with FRP sheets
No full textA brief overview of anchorage systems is dealt with introducing experimental tests on eight types of end fixing for reinforced polymers
(FRP) sheets glued on RC elements. Particular test set-up and T-shaped specimens have been designed and realized to test mechanical
fixings with steel or FRP plates glued or bolted, FRP bars or L-shaped fibers. The experimental results confirm that the various solutions
have different performances in improving the debonding load. Numerical analysis confirm the reliability of debonding formulations
available; furthermore a simple evaluation of anchorage effectiveness is proposed
Bond Tests on Concrete T-shaped Sections Strengthened with CFRP
No full textInnovative techniques based on fibre reinforced polymer (FRP) laminates externally bonded to existing structures appear to be interesting alternatives to traditional solutions for the seismic upgrade and repair of buildings and civil structures. Interface failures represent a typical issue of FRP laminates externally applied to reinforced concrete elements, due to high stress concentrations in the anchorage zone of most types of application. Experimental tests to evaluate the efficiency of anchorage systems to avoid the delamination failure at the end of FRP laminates have been performed. Efficiency of the anchorage is evaluated either in terms of ultimate strength or in terms of ductility of the syste
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
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
Tension stiffening of RC Ties Strengthened with externally bonded FRP Sheets
No full textExternally bonded laminates of fiber reinforced polymers ~FRPs! are becoming more and more common for rehabilitation and
strengthening of RC structures, to solve problems either in serviceability or at ultimate conditions. This paper focuses on the behavior in
the serviceability state: in particular, verifications in terms of cracks widths and crack spacing, used to warrant the functionality of
FRP-RC structures, are considered. Test results on RC ties externally reinforced with FRP laminate are reported and the applicability of
the Eurocode2 formulation used for RC elements is discussed. Provisions given by the International Federation for Structural Concrete are
also analyzed
- …
