1,720,976 research outputs found
Experimental and Nonlinear Finite Element Studies of RC Beams Strengthened with FRP Plates
No full textThis paper presents a joint experimental–analytical investigation aimed at studying the brittle failure modes of RC members strengthened in flexure by FRP plates. Both midspan and plate end failure modes are studied. The finite element analyses are based on nonlinear fracture mechanics. The model considered the actual crack pattern observed in the tests by using a smeared and an interface crack model. This paper shows how concrete cracking, adhesive behavior, plate length, width and stiffness affect the failure mechanisms. The numerical and experimental results show that debonding and concrete cover splitting failure modes occur always by crack propagation inside the concrete
Recovery of Art Nouveau European architecture: materials, technologies, degradation and conservation strategies
No full textModern architecture, dating back the end of XIX and the beginning of XX century, represents an important cultural heritage, being threatened by rough or unsuitable restoration works.
For the safeguard of this heritage, a detailed diagnostic survey of the materials and technologies of the period, an investigation about their interaction with the urban polluted environment and the setting up of compatible restoration protocols are strongly needed.
Although modern architecture had different features in Europe, a common methodological approach should be outlined, in order to promote sensible and compatible restoration and maintenance works all over Europe
Research needs for Cultural Heritage conservation: 1 – Outlining new diagnostic protocols for materials’ restoration
No full textIn architectural restoration works on cultural heritage, no operation (cleaning, consolidation, etc.) can be properly performed without a suitable preliminary diagnostic investigation about the materials’ nature and decay processes and products. Yet, diagnostics is still regarded as marginal by the many professional committed in restoration and is performed with casualness. As a consequence, approximate and unsatisfactory restoration works are often carried out and, in the worst cases, further damage are caused to architectural heritage.
In order to enhance the use of diagnostics in restoration, diagnostic protocols based on a holistic approach are needed (flexible enough to be applied all over Europe) and relevant harmonised standards should be set up
Research needs for Cultural Heritage conservation: 2 – Innovative materials and technologies
No full textThe fulfilment of the requirements of the Carta del Restauro (1972) still gives rise to several problems, as far as materials and technologies for architectural restoration are concerned. As a matter of fact, currently used materials often exhibit poor compatibility with the ancient substrates, or scarce effectiveness, or unsatisfactory long-term performances, etc.
Hence the setting up of new materials and technologies should be investigated, such as nanomaterials, composites, hybrid organic/inorganic binders, etc., for applications in restoration works (decayed stone consolidation, plasters re-adhesion, topping up of lacking or irrecoverably damage materials, art nouveau buildings restoration, etc.), in order to safeguard the architectural heritage in terms of both functionality and image
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
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