1,720,954 research outputs found
Synthesis and characterization of MgCuZn ferrites by co-precipitation and mixed oxide route / Chin Chee Lung
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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
Optimization Of Physical Characterization Of Malaysian Clay For Ceramic Tile Production
Get PDFClay is an important raw material in manufacturing of ceramic tiles. From economical point of view, local clays are important for demand of local ceramic tile industries. However, no comprehensive research work was carried out on Malaysia clays for application in ceramic tiles. The research work is aimed to provide scientific data on characterization of Malaysian clays from Ipoh (Perak), Kuala Rompin (Pahang) and Mersing (Johor) and their suitability for ceramic tile industry. The research covered characterization of study clays, effect of ceramic tile processing parameters on properties of studied clays and application in ceramic tiles. The clays were characterized by chemical composition, mineralogy, rheological analysis, physical, thermal and fired properties. Results showed that Ipoh clay is coarser in particle size (14.6 um) than Kuala Rompin (7.2 um) and Mersing clays (6.0 um). For rheological behaviour, sodium tripolyphosphate (STPP) is the most suitable deflocculant for the studied clays with CEC of 16 to 40 meq/100g and optimum deflocculant of 0.10 to 0.24% for manufacturing of ceramic tiles by wet milling process. For mineralogical analysis, kaolinite was present abundantly in Ipoh clay of about 78.7%, while Kuala Rompin and Mersing clays are containing high percentage of quartz (34.1% and 43.9%, respectively) and illite (39.1% and 30.7%, respectively). Mineralogy of clay is greatly affecting the fired properties of studied clays, where Kuala Rompin and Mersing clays shown higher densification (2.3 – 2.5 g/cm3), higher shrinkage (9.0 – 13.0%), lower water absorption (0.0 – 2.0%), higher CTE (8.1 – 8.4 x10-6 'C-1) and darker fired colour (L* of 60 - 70) than Ipoh clay at firing temperature of 1200 'C. For processing parameters, pressing pressure and firing temperature have greater impact to drying and fired properties, while both moisturizing and milling time have minor effect on both drying and fired properties of studied clays. Statistical design of mixture experiment proves that the clays are suitable to be used for production of ceramic tiles but its application is highly dependent to ceramic tile production practice by pressing pressure and firing temperature. For commercial floor tile production practice, studied clays have only fulfilled categories of BIIb and BIII ceramic tiles. For commercial porcelain tile production practice, studied clays have fulfilled almost all the ranges of ceramic tiles from BIa to BIII. The outcome of the research work shows that mineralogy and particle size of clay, pressing pressure and firing temperature have direct influenced on fired properties of studied clays and ceramic tiles body formulation
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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