1,721,549 research outputs found
Condensation risk: comparison of steady-state and transient methods
Get PDFAccurate assessment of both surface and interstitial condensation risk is important not only to reduce the damaging effect of moisture within the structure of buildings, but also to provide a healthy environment free from mould growth. The current British Standard (BS EN ISO 13788: 2002) contains an assessment procedure based on the assumption of a steady-state heat flow through the building envelope, neglecting the transient nature of the problem. This paper compares and evaluates numerical results of the condensation risk calculation under both steady-state and transient conditions using the existing numerical codes. Significant differences are apparent between the predictions of the simple (steady-state) and complex (transient) methods for all construction details modelled
Programme development for the calculation of water vapour diffusion according to SIST EN ISO 13788 standard
Get PDFMould growth and excess moisture pose problems in residential as well as working and other\ud
spaces. Our purpose was to study legislation regarding condensation, in particular the SIST\ud
EN ISO 13788:2002 and SIST EN ISO 13788:2013 standards. SIST EN ISO 13788:2002\ud
standard describes calculation methods for the internal surface temperatures of a building\ud
component or building elements below which mould growth is likely as well as risk\ud
assessment of condensation due to water vapour diffusion. We have also studied the revised\ud
SIST EN ISO 13788:2013 standard which includes an example of determining internal air\ud
temperature and relative air humidity as well as examples for calculating building\ud
components which contain intermediary air layers and an example of calculating the drying of\ud
moisture which was generated during the execution of the building component.\ud
On the basis of the aforementioned documentation, we have devised a programme and\ud
named it PIDVP. The programme enables the calculation of water vapour diffusion as well as\ud
an assessment for the risk of mould growth and condensation formation on the surface and\ud
inside the building component. We have also included calculations for determining internal\ud
temperature and air humidity. The tool does not include the possibility to make calculations\ud
for a construction which contains air layers and calculations to determine the drying time of\ud
moisture which was generated during the construction.\ud
All examples of calculations from the SIST EN ISO 13788:2002 standard have been\ud
recalculated with the help of this programme. Two additional examples (for the roof and wall)\ud
were calculated with the help of the devised programme and KI Energija 2014 programme.\ud
The comparison of calculations is shown in the tables which particularly display the\ud
compliance of the results. It has been determined that there were only negligible deviations\ud
when comparing the results. There were bigger deviations only in the additional example for\ud
the wall when calculating the level of condensation in April if we compare the results of the\ud
newly devised programme (which foresees the condensation formation in one of the planes)\ud
and the results from KI Energija 2014 programme (which foresees the drying of the\ud
condensed water vapour in the same plane). On the basis of the calculation comparisons\ud
analysis, it can be concluded that the newly developed programme works correctly.\ud
According to the described analysis we can conclude that the deviations in the month of April\ud
were only due to a different method of condensation level calculation
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
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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