1,720,958 research outputs found
Impact and dynamic deformation behaviour of mechanically alloyed tungsten-based composites
No full textThe tensile properties, impact energy and dynamic deformation behavior were investigated to examine the effects of microstructural factors on the mechanical properties of mechanically alloyed tungsten-based composites. The 93W-5.6Ni-1.4Fe composites were fabricated by mechanical alloying process using elemental powders of tungsten, nickel and iron, followed by sintering at temperature ranged from 1445 to 1485 degrees C under hydrogen atmosphere. Tungsten-based composite sintered using mechanically alloyed powders showed finer tungsten particles about 5-18 mu m with high density above 99% at shorter sintering time than fabricated by conventional liquid phase sintering process. When solid state sintered at 1445 degrees C, the microstructure showed that the solid solution matrix phase was isolated within interconnected tungsten particles. While, when liquid phase sintered above 1460 degrees C, the microstructure showed that the spherical tungsten particles were distributed within continuous solid solution matrix phase. The elongation and impact energy were increased, maintaining similar tensile strength, with increasing matrix volume fraction and decreasing the W/W contiguity as the sintering temperature increased. The dynamic torsional behavior using Kolsky bar exhibited the brittle fracture in solid state sintered composite, while showed the shear fracture liquid phase sintered composite
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
SPEECH ERROR IN “GET REAL GIVING THANKS WITH SAM KIM EP #22 BY DIVE STUDIOS” VIDEO PODCAST
Get PDFThe study aims to describe the speech errors and find out the causes of the speech errors in the video podcast Get Real Giving thanks with Sam Kim Ep 22. The researchers collected data using the documentation method and applied qualitative analysis. The data for this research were the utterances from the video podcast Get Real Giving thanks with Sam Kim Ep 22. The data source was a video between the hosts, Ashley and BM, and the guest, Sam Kim, which was downloaded from the official DIVE Studios YouTube Channel with durations of 46 minutes. The data were described based on the theory of Common Speech Errors by Clark Clark (1977). According to the results, it was shown that Ashley made nine types of errors totaling 47 errors, but BM made eight types, so he did not make errors in types of stutters totaling 80 errors, and Sam made nine types totaling 106 errors. The causes of the speech errors are due to internal and external factors such as nervousness, hesitation, haste, and lacking concentration. The total number of speech errors made by the speakers is 233 mistakes. The speech errors happened as many as 52 repetitions, and Sam did it the most. In filled pause, 46 mistakes occurred, and Sam as well as BM produced the most errors. In silent pause, 41 errors occurred 41, and all speakers made the errors. In interjections, 37 mistakes occurred, and Ashley made the fewest mistakes. In false starts (unretraced), 14 mistakes occurred, and BM as well as Ashley made 4 mistakes. In corrections, 13 mistakes occurred, and BM only made two mistakes. In stutters, 13 mistakes happened, and Asley and Sam made the most mistakes, but BM did not make any mistake. In a slip of the tongue, 11 mistakes occurred, and Ashley made only one mistake. In false starts (retraced), which is the least common type, 6 mistakes occurred
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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