1,721,015 research outputs found
TORQUE TRANSMISSION CAPABILITIES OF ADHESIVELY BONDED TUBULAR LAP JOINTS FOR COMPOSITE DRIVE SHAFTS
No full textThe stresses and torque transmission capabilities of adhesively bonded circular, hexagonal and elliptical lap joints were analyzed by the three-dimensional finite element method and compared with the experimental results. The adherends of the joints were composed of carbon fiber epoxy composite shafts and steel shafts. In calculating the torque transmission capabilities, the linear laminate properties of the composite material and the nonlinear shear properties of the adhesive were used. Using this method, the torque transmission capabilities of the adhesively bonded lap joints could be calculated accurately, except the circular and the hexagonal single lap joints whose adherends were failed by bulging when the composite adherends had small stacking angles from the shaft axis. The experiments revealed that the hexagonal joint had the best torque transmission capability among the single lap joints, and the double lap joint had better torque transmission capability than the single lap joint. The torque transmission capability of the hexagonal single lap joint was found to be comparable to that of the circular double lap joint.
OPTIMAL TUBULAR ADHESIVE-BONDED LAP JOINT OF THE CARBON-FIBER EPOXY COMPOSITE SHAFT
No full textThe effects of adhesive thickness and adherend surface roughness on the fatigue strength of the tubular adhesive-bonded single lap joint were experimentally investigated using small fatigue test specimens (phi-21 mm) whose adherends were made of S45C carbon steel. From the fatigue experiments, it was found that the optimal arithmetic surface roughness of the adherends was about 2-mu-m and the optimal adhesive thickness was about 0.15 mm. Also, the manufacturing method of the adhesive-bonded tubular single lap joint was discussed for the reliable and optimal joint quality. Using the optimal adhesive thickness and the optimal adherend roughness. the prototype torsional adhesive joints for thc power transmission shafts (phi-66 mm) of an automotive or a small helicopter were manufactured and statically tested under torque. The tests were performed on the single lap joint, the single lap joint with scarf, the double lap joint. and the double lap joint with scarf. The one part of the adherend of the joint was made of high strength carbon fiber epoxy composite material and the other part of the adherend was made of S45C carbon steel. The stresses of joints were analyzed by the finite element method. In applying the finite element method to the composite adherends, the smeared laminate properties were used. From the experiments, it was found that the double lap joint was the best among the joints in terms of torque capacity as well as manufacturing cost
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
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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