1,720,955 research outputs found
Performance assessment of vegetable oil based cutting fluids with extreme pressure additive in machining
No full textThe present work focuses on the experimental evaluation of the performance of vegetable
oil based cutting fluids (coconut, canola and sesame oils) with extreme pressure (EP) additive in
machining. Cutting fluids are prepared with three different base oils at three different percentages of
EP additives. Performance of these cutting fluids is assessed by measuring cutting forces, cutting tool
temperature, tool flank wear and surface roughness in turning AISI 1040 steel with coated carbide tool.
Experiments are conducted initially at constant cutting conditions with 5% EP additive in vegetable
oils in order to compare their performance with conventional cutting fluid prepared from soluble oil.
Further evaluation is done by varying percentage of EP additive and cutting conditions as well. The
results indicated that 10% EP additive included in coconut oil based cutting fluid performed better
compared to other vegetable oils and other percentages of EP additive
Multi response optimization for turning aisi 1040 steel with extreme pressure additive Included vegetable oil based cutting fluids using grey relational analysis
No full textThe present work focuses on finding the optimal machining parameters in turning AISI 1040
steel with multiple performance characteristics using Grey-based Taguchi method. The multi-response
problem is converted into an equivalent single-response problem using Grey Relational Analysis
(GRA). A Grey grade obtained from GRA is analysed to get optimal machining parameters using the
Grey grade as the performance index. The performance characteristics selected in this work are cutting
force, cutting tool temperature, tool flank wear and surface roughness. These performance
characteristics are analysed to obtain the optimal machining parameters for type of vegetable oil based
cutting fluid, proportion of extreme pressure (EP) additive, cutting speed and feed. The results reveal
that type of vegetable based cutting fluid is found to be the major factor along with feed, proportion of
EP additive and cutting speed that influences the multiple performance characteristics
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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