1,720,954 research outputs found
Which methods are suitable to assess the effectiveness of chemical injection treatments in the laboratory?
Full text linkResin injection is a widespread technique to fight rising damp in historic brick masonry buildings, but the evaluation of its drying effectiveness is often hard, also due to the lack of standard procedures to test the different damp-proofing materials. Some testing procedures have been proposed in national guidelines and scientific literature to assess the effectiveness of chemical injection in laboratory, but they reflect very different approaches and are hard to compare.
This paper firstly provides a critical overview of the presently available methods to assess the effectiveness of chemical injections in brick masonry at the laboratory scale, highlighting their main advantages and drawbacks. Then, two different experimental test walls are proposed, having large and small size, respectively. The test walls were manufactured and subjected to a continuous capillary rise of water, monitoring the moisture amount by a micro-destructive method based on “permanent sampling holes”. Both test walls allowed to effectively reproduce rising damp occurring in real masonry walls and to monitor the moisture amount during time by an easy and reliable method. Large walls involve a long curing time (more than 1 year in laboratory conditions) and are quite space consuming, but they are less affected by the microclimatic variations. Conversely, small walls are more easy to handle, but also more affected by RH changes. The proposed test walls aim at contributing to the future development of a new testing procedure to evaluate chemical damp-proof courses in laboratory
Laboratory models for the assessment of the effectiveness of chemical damp-proofing in masonry: existing methods and some proposals for new fixtures
No full textCoping with rising damp in existing masonry is extremely complex due to several reasons, such as the presence of architectural constrictions, the variability of ancient materials and technologies and the difficulty of monitoring moisture in a quantitative and accurate manner. For this reason, investigating the effectiveness of the different repair systems at a laboratory scale may greatly contribute to a better understanding of the functioning of such systems and to their improvement.
In the case of chemical damp-proofing, some methods have been proposed in the literature and by national Institutions, but the approach followed by these methods are very different and not homogeneous.
In the present paper, a review of the methods for the assessment of the performance of chemical damp-proofing by use of laboratory models is carried out, highlighting their strong points and drawbacks.
Then, two new kinds of masonry models, characterised by different geometry and size, are proposed, allowing the reproduction of rising damp occurrence in the laboratory. Some preliminary results are shown about their employment for the monitoring of rising damp, also highlighting some critical aspects connected to their conditioning
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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