1,720,970 research outputs found
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
Post-Fire Damage and Corrosion in Structural Steels: Characterization and Prevention
Full text linkSteel structures frequently experience extreme service conditions such as fire accidents, corrosion, etc., resulting in significant deterioration, reduced service life, and increased maintenance cost. Almost 0.5 million structural fire accidents are reported annually in the U.S., inflicting a considerable toll on infrastructure. Similarly, corrosion-induced deterioration is the leading cause of premature failure in infrastructure and costs $22.6 billion in infrastructure maintenance annually. The bridge infrastructure vulnerability to these extreme service conditions is compounded by the aging bridge inventory (42% of the 617,000 bridges in the U.S. are 50 years or older). To improve the resilience and the ?C-? infrastructure grade, it is vital to understand the material-scale damages and mechanisms induced by such extreme service conditions and develop efficient mitigation strategies. This dissertation adopts a two-prong approach to understand and predict the material-scale damage after exposure to fire accidents in steel structures and mitigate corrosion damage in steel/RC structures. Specifically, it aims to improve our current understanding of the post-fire mechanical behavior of steels and propose a microstructure-based approach for forensic analysis of fire-affected steel structures in phase-I. It further aims to mitigate corrosion in steel/RC structures by employing agriculturally-derived non-toxic materials and surface treatments in phase-II.
Post-fire mechanical and microstructural investigations conducted in phase-I revealed that stress concentrations and fire-extinguishing methods significantly affect the post-fire mechanical behavior of structural steels, and post-fire steel microstructure can be utilized to accurately estimate the mechanical strength of structural steels without the knowledge of fire temperatures. The outcomes of phase-I of this dissertation can lead to accurate forensic fire investigations and usability determination of the fire-affected steel structures. The results obtained from phase-II of this dissertation revealed the role of surface treatments in improving the corrosion resistance and validated the performance of the agriculturally-derived materials such as corn-derived inhibitors and soy-protein coatings in lowering the corrosion damage in structural steels and embedded rebars by up to 90% without compromising the integrity of cement-based materials. These outcomes will lead to mitigating corrosion-induced deterioration in aging and new infrastructure. Overall, the outcomes of this dissertation contribute to improving infrastructure resilience and reducing maintenance costs
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
Influence of high stress triaxiality on mechanical strength of ASTM A36, ASTM A572 and ASTM A992 steels
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