1,720,955 research outputs found
Alkali–Silica Reactivity Potential of Aggregates from Different Sources in Pakistan
Full text linkThis paper aims to support stakeholders in the sustainable construction sector
by exploring the potential of unexamined aggregates from five distinct origins: the Jandol
River, the Swat River, the Panjkorha River, the Kitkot Drain, and the Shavey Drain situated
in Malakand division, North Waziristan, Pakistan, concerning Alkali–Silica Reaction (ASR)
prior to their incorporation into large-scale construction practices. Petrographic examination
for the determination of the mineralogical composition of all collected aggregates
revealed that aggregates stemming from the Swat River, Panjkorh River, Kitkot Drain,
and Shavey Drain exhibited no reactive minerals. In contrast, those from the Jandol River
showed reactive mineral content. Physical analysis of the aggregates revealed that Jandol
River aggregates had superior resistance to impact, crushing, and abrasion, having values
of 18.53%, 18.53%, and 20.10%, respectively. Moreover, the chemical analysis exhibited the
highest silica content (SiO2) in Jandol River aggregates, i.e., 94.7%, respectively. Samples in
the form of cubes, prisms, and mortar bars were prepared to study both the mechanical
properties and the expansion tendencies of specimens prepared from different aggregate
sources. Validation of the reactive nature of the Jandol River aggregates was corroborated
by the expansion results obtained from the mortar bars and the reduction in compressive
strength and flexure strength by 8.2% and 9.2%, respectively, after 90 days, higher than
that of aggregates exposed to ASR sourced from the other four origins. It can be asserted
that aggregates from the Jandol River source are more susceptible to ASR as compared
to other aggregates. To mitigate the potential of ASR, various strategies, such as using
low reactivity, natural, or processed aggregates; low alkali-containing cement; inducing
pozzolanic substances in concrete; etc., are recommended. Simultaneously, an economic
feasibility study and environmental assessments are recommended as future developments
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
Impact of Software Comprehension in Software Maintenance and Evolution
No full textThe need of change is essential for a software system to reside longer in the market. Change implementation is only done through the maintenance and successful software maintenance gives birth to a new software release that is a refined form of the previous one. This phenomenon is known as the evolution of the software. To transfer software from lower to upper or better form, maintainers have to get familiar with the particular aspects of software i.e. source code and documentation. Due to the poor quality of documentation maintainers often have to rely on source code. So, thorough understanding of source code is necessary for effective change implementation. This study explores the code comprehension problems discussed in the literature and prioritizes them according to their severity level given by maintenance personnel in the industry. Along with prioritizing the problems, study also presents the maintenance personnel suggested methodologies for improving code comprehension. Consideration of these suggestions in development might help in shortening the maintenance and evolution time.Usman Akhlaq Mirpur, Azad Kashmir, Pakistan Muhammad Usman Yousaf Bhimber, Azad Kashmir, Pakista
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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