1,720,974 research outputs found
A study on fatigue crack propagation in thick composite adhesively bonded joints
No full textThe fatigue crack propagation in adhesively bonded, thick composite joints was investigated experimentally using double cantilever beam and single lap joint specimens. The crack growth was modelled using a fracture mechanics model based on finite element models. The parameters of the Paris law were derived from fracture mechanics tests on double cantilever beam joints. The fatigue crack propagation in tapered single lap joints was modelled using these parameters and results compared with fracture observations. In both the fatigue tests on single lap and DCB joints complex crack paths were observed, with a combination of cohesive failure and delaminations. In spite of the complexity of the crack growth behaviour, a numerical model, based on the crack propagation in the adhesive layer only, allowed for predicting the crack growth behaviour observed during fatigue tests on single lap joints with relatively good accuracy
Interactive journaling as a mental health coping strategy for youths / Nur Shahmina Dayini Kasman and Sheik Badrul Hisham Jamil Azhar
Full text linkSince 2017, the prevalence of mental health disorders among youths and young adults in Malaysia appears to be growing in frequency and severity. The cause of this matter may vary depending on one’s circumstances; however, studies show that most suffering people dislike sharing their side of the story, and this may be the grounds for the issue they face. Due to self-consciousness, many are reluctant to disclose their problems due to scared of being judged, and as a result, they pent up their emotions. In consideration of this matter, nurturing this habit will gradually lead to poor mental well-being. Thus, the purpose of this project ‘A Book You Never Knew You Needed’ is to assist youths in finding an appropriate outlet for expressing their problems through journaling. In order to gather youths' perspectives on journaling, a google form survey was conducted. The findings then revealed that the respondents between the age of 18 to 22 find writing and art help in expressing their thoughts, and writing is the most preferable medium to vent
Comparative study of cohesive zone and virtual crack closure techniques for three-dimensional fatigue debonding
Full text linkAdhesively bonded metallic and/or composite material structures are present as principal structural elements in several fields, such as aeronautics, automotive, nautical, and wind energy. A numerical method able to reproduce three-dimensional fatigue debonding and, in the case of composites, delamination evolution in bonded structures is therefore necessary to improve their performances. In this paper, a comparison of the performances of a cohesive zone model developed by some of the authors and the Virtual Crack Closure Technique (VCCT) embedded in the software Abaqus (v. 6.11) is made on mode I, mode II, and mixed-mode I/II loaded cracks in bonded assemblies
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
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