1,721,066 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
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
Study on wind energy potential by eight numerical methods of Weibull distribution
No full textRasul, M ORCiD: 0000-0001-8159-1321In this study, eight different numerical methods have been investigated to identify more effective methods for efficiently determining the value of Weibull factors (k and c) to estimate wind energy potential. To achieve the goal, the study used nine statistical test tools including relative percentage of error, root mean square error, mean percentage of error, mean absolute percentage of error, chi-square error, and analysis of variance to precisely rank the methods. The method of moment, least square method, and empirical method were found to be better methods for calculating Weibull factors in this specific application. The statistical fittings of the measured and calculated wind speed data by Weibull functions are assessed and results are graphically represented to provide better understanding. The monthly variations of available power, energy density, energy intensity, etc. have been analyzed for the selected wind sites. This analysis used 10-min time series wind speed data obtained by the United Nations Development Programme (UNDP) wind project at four wind monitoring stations in Bangladesh. Further study is needed for long-term wind data analysis for a prospective windy site and a suitable design of wind turbine for that site. © 2017 Elsevier Inc. All rights reserved
Biodiesel from Queensland bush nut (Macadamia integrifolia)
No full textRasul, M ORCiD: 0000-0001-8159-1321Macadamia, an oil-enriched Queensland bush nut, is one of the Australian native species. In this study, crude vegetable oil was extracted from Macadamia nuts by the n-hexane (98%) method and converted to biodiesel by a transesterification reaction. The reaction utilized potassium methoxide as a catalyst with a reaction temperature of 60°C for 60 min. The physiochemical fuel properties of the crude vegetable oil and converted biodiesel were tested under the ASTM and EN standards and compared with ultra-low sulfur diesel (ULSD). The fatty acid methyl esters (FAMEs) were analyzed by gas chromatography (GC) using the AOCS Ce 1a-13 standard method. The physical behavior of the biodiesel at different temperatures was analyzed and compared with ULSD. The mass and energy balances were studied for both the oil extraction and biodiesel conversion processes to calculate the total process loss of the conversion system. The study found about 73% oil yield for macadamia nut by n-hexane extraction and a 98.21% conversion efficiency utilizing the designated reaction. The GC test identified 21 FAMEs in the biodiesel that contains mainly 15.39%vol. palmitoleic acid (C16:1) and 61.09%vol. oleic acid (C18:0). Other fuel properties, such as calorific value (39.88 MJ/kg), flash point (137°C), and cetane number (56.9) were measured and compared with ULSD values. In the biodiesel conversion process, 58.71% of total mass was recovered as a final product (biodiesel) and 12.51% as by-product (glycerin), respectively, which means that 84% energy was recovered by biodiesel and 10% by glycerin with a 6% energy loss during the conversion process. © 2017 Elsevier Inc. All rights reserved
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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