1,721,033 research outputs found
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
Accurate and reliable U -value assessment of argon-filled double glazed windows: A numerical and experimental investigation
No full textU-value assessment is a significant process to be able to evaluate the thermal insulation performance of building materials notably windows. About 60% of energy losses from building envelope is attributed to windows, hence accurate and reliable thermal resistance evaluation of glazed areas is of vital importance for a sensitive energy demand analysis of buildings. U-value assessment of windows is usually conducted through theoretical and numerical methods in literature. However, dwellers frequently complain about the insufficient thermal insulation performance of commercial glazing products when compared to the reported U-values in datasheets. This inconvenience arises from the lack of comprehensive experimental tests which simulate the actual operating conditions. Therefore, in this research, argon filled double glazed windows, which is one the most common fenestration products in market, is numerically and experimentally analysed in terms of U-value performance. Although computational fluid dynamics (CFD) analyses reveal that the U-value of the reference sample (4 mm pane + 20 mm argon + 4 mm pane) is 0.89 W/m(2)K, which is in good accordance with the theoretical data (0.80 W/m(2)K), it is observed from the environmental chamber tests that the U-value in simulated operating conditions is 1.25, 1.18 and 1.32 W/m(2)K for top, centre and lower positions of the window sample. The tests are repeated for accuracy verification, and the U-value is found to be 1.23, 1.18 and 1.31 W/m(2)K for the said points. In this respect, it is concluded that thermal bridges and edge effects play a key role in actual U-value performance of glazing products. Therefore, experimental performance figures are recommended to be utilised in energy demand analyses of buildings. (C) 2018 Elsevier B.V. All rights reserved.TUBITAK (The Scientific and Technological Research Council of Turkey) [216M531]The author gratefully acknowledges the financial support of TUBITAK (The Scientific and Technological Research Council of Turkey) through the Project grant of 216M531
Impacts of edge seal material on thermal insulation performance of athermally resistive photovoltaic glazing: CFD research withexperimental validation
Full text linkA novel design of photovoltaic (PV) glazing technology called TRPVG is introduced within thescope of this research, and thermal insulation performance of TRPVG for different edge sealmaterials is evaluated through a well-known and reliable commercial software ANSYS FLUENT.For a typical TRPVG configuration, CFD results are compared with the experimental data, and agood accordance is achieved. Then, different potential edge seal materials are considered forTRPVG technology in terms of their impacts on thermal bridging and hence overall heat transfercoefficient (U-value) of entire glazing. Besides the plastic based edge seals, which are widelyutilized in fenestration products, thermal superinsulation materials like flexible aerogel are alsoconsidered in the research to analyze their potential effects for reducing the U-value range ofTRPVG. A recent experimental research indicates a U-value of 1.10 W/m2K in whichunplasticised polyvinyl chloride (PVC-U) is considered as edge seal. The U-value from the CFDresearch for the said configuration is determined to be 1.19 W/m2K, which verifies the accuracyof the numerical analyses. Further investigations reveal that the U-value of TRPVG can beenhanced to 1.13 W/m2K only if PVC-U edge seal is replaced with aerogel. This can be attributedto the competitively low thermal conductivity of PVC-U material (0.19 W/mK) as an edge seal.The predicted U-values of TRPVG are reported to be 1.44 W/m2K for polymer seal, 1.32 W/m2Kfor glass fiber seal, 1.26 W/m2K for polycarbonate seal, 1.24 W/m2K for polyethylene seal, 1.20W/m2K for acrylic seal and 1.18 W/m2K for epoxy seal. © 2019 Published by peer-reviewed open access scientific journal.Türkiye Bilimsel ve Teknolojik Araştirma Kurumu: 216M531The author gratefully acknowledges the financial support of TÜBİTAK (The Scientific and Technological Research Council of Turkey) through the project grant of 216M531
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
- …
