1,720,991 research outputs found
Parameter estimation approach applied to the characterization of an intumescent fire retardant paint
No full textIntumescent paints are used as passive fire protection system in structural constructions. In particular they are widely used as fire retardant to protect structural steel elements. The thermal properties of intumescent paints are often unknown and difficult to be estimated since they vary significantly during the expansion process induced by the fire event; for this reason the fire resistance validation of commercial coatings is based on expensive, large-scale methods where each commercial coating/beam configuration has to be tested one by one. Adopting, instead, approaches based on the thermal modeling of the intumescent coating could provide a helpful tool to simplify the test procedure and to support the design of fire resistant structure as well. Inverse parameter estimation methodologies offer a robust tool to obtain this required information. The present investigation is focused on the assessment of such methodology applied to the restoration of the thermal properties which can be used to model the behavior of intumescent coatings. The parameter estimation procedure is first validated throughout its application to synthetic data derived with regard to an IPE 400 steel beam. The analysis is then completed throughout the application of the parameter estimation methodology to the experimental temperature history of protected steel beams subjected to a fire test according to EN 1363-1 and ENV 13381-4 standards. The results suggest that the approach suggested here, based on the modeling of the behavior of the intumescent paint by means of an equivalent thermal conductivity, could be suitable for quantifying the fire retardant effect of the protective coating
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
Parameter estimation approach applied to the characterization of an intumescent fire retardant paint
No full textIntumescent paints are used as passive fire protection system in structural constructions. In particular they are widely used as fire retardant to protect structural steel elements. The thermal properties of intumescent paints are often unknown and difficult to be estimated since they vary significantly during the expansion process induced by the fire event; for this reason the fire resistance validation of a commercial coating is based on expensive, large-scale methods where each commercial coating/beam configuration has to be tested one by one. Adopting, instead, approaches based on a thermal modelling of the intumescent paint coating could provide an helpful tool to make easier the test procedure and to support the design of fire resistant structure as well. Inverse parameter estimation methodologies offer a robust tool to restore these wanted information. The present investigation is focused on the assessment of such a methodology applied to the restoration of the thermal properties which can be used to model the behaviour of intumescent coatings. The parameter estimation procedure is first validated throughout its application to synthetic data derived with regard to an IPE 400 steel beam. The analysis is then completed throughout the application of the parameter estimation methodology to the experimental temperature history of protected steel beams subjected to a fire test according to EN 1363-1 and ENV 13381-4 standards. The results suggest that the here suggested approach, based on the modelling of the behaviour of the intumescent paint by means of an equivalent thermal conductivity, could be suitable for quantifying the fire retardant effect of the protective coating, although other experimental cross-validation of the methodology is needed
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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