1,721,125 research outputs found
Alien Registration- Heikkinen, Elli Maria (Andover, Oxford County)
Get PDFhttps://digitalmaine.com/alien_docs/18142/thumbnail.jp
Evaluation of hygrothermal ageing damage in structural foam cored marine sandwich materials and the potential of thermoelastic stress analysis for its detection
No full textThis work seeks to address concerns voiced in the marine industry over the confidence of design safety factors applied to sandwich cores following reported failures in service and the introduction of new lower standards for linear foams. Design calculations largely define the safety factor for the sandwich structure based upon the performance characteristics of the laminate skins with only basic criteria for the core, in terms of section modulus, moment of inertia, core shear and density, all intended to limit skin buckling at the compressive face. Typically, the core is the most vulnerable component of the sandwich, and is assigned the lowest factor of safety with no allowance for change in the material properties over time. Much of the research on durability and the effects of environmental ageing into the degradation of sandwich materials has been generated by the aeronautical industry and has focused upon laminate composites with environmental exposure specific to flight. Further information is required by marine designers to address the knowledge gap in the estimation of risk posed by the altered response of aged cores, especially in light of the special dispensation offered to linear foams of equivalent density. The approach adopted by this work was an experimental investigation into the effects of ageing on two medium density foam types, typical of the marine industry; a cross-linked C70.130 and a linear R63.140. Their responses to exposure and ageing were chronicled by changes in weight and fracture toughness. Fracture toughness values were obtained for a progression of mixed modes from pure tensile to pure shear, mapping the deterioration of mechanical properties over a period of accelerated ageing using a sharp edge- crack CTS-type specimen with the same configuration for all modes. Mechanical testing revealed increasing brittle behaviour for both foam and micrographs depicted evidence of pitting and leaching of material from the cell of the R63.140. Long-term environmental exposure was simulated by</p
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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