1,720,967 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
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
Rapid L-PBF printing of IN718 coupled with HIP-quench: A novel approach to manufacture and heat treatment of a nickel-based alloy
Full text linkThere has been a growing interest in additive manufacturing in recent years, with researchers actively working on improving component quality through adjustments to printing parameters, lead time, and productivity. Rapid L-PBF printing has emerged as an attractive approach to expedite component manufacturing. However, employing a rapid building strategy may lead to additional internal flaws, which can be addressed during a Hot Isostatic Pressing (HIP) cycle. In this study, Inconel 718 was L-PBF printed using two distinct strategies: one involving the creation of a dense 1 mm shell with loosely packed powders in the core and the other utilizing different sets of printing parameters for the shell and core, respectively. These strategies resulted in a 60% and 45% printing time reduction, respectively, compared with the time requirement for printing same-size cubic samples with optimized parameters. Additionally, full densification and porosity elimination were achieved through a HIP-quench approach, obviating the need for further heat treatment. The study presents the final microstructures and retained flaws, along with assessing the degree of recrystallization via EBSD analysis and evaluating mechanical properties using hardness measurements and compression tests
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
Role of the preheating temperature during electron beam powder bed fusion (PBF-EB/M) in precipitation of γ’ and carbides in Inconel 738 superalloy
Full text linkn this work, two tailored electron beam powder bed fusion (PBF-EB/M) preheating conditions were selected to build Inconel 738 (IN738) superalloy. The IN738 samples produced at 1025 °C (R1) and 950 °C (R2) were characterized in the as-built condition to investigate the effect of the preheating temperature on the evolution of their microstructural features. Both samples showed low residual porosity (<0.2 %), and the microstructure displayed columnar grains elongated in the building direction, together with the precipitation of γ’ (Ni3Al), Ta-rich MC, and Cr-rich M23C6. The R1 condition developed a multimodal γ′ size distribution subjected to strong coarsening along the building direction. This scenario provoked a notable microhardness gradient and micro-crack formation due to the severe residual stresses developed. On the contrary, the lower preheating temperature chosen for the R2 condition provoked the precipitation of γ′ in a homogeneous monomodal size distribution with negligible coarsening along the building direction, thus lowering the residual stresses (no micro-cracks) and stabilizing the microhardness. The preheating temperature thus had a lower impact on carbide precipitation and evolution compared to the γ’ one. Both conditions experienced the precipitation of Cr-rich M23C6 and Ta-rich MC carbides along the grain boundaries, coupled with fine Ta-rich MC carbide precipitation inside the grains. However, the R2 condition underwent slightly lower precipitation. The current study therefore highlights the beneficial effects of tailoring the PBF-EB/M preheating temperature to control the evolution of the microstructural features and their effect on the development of residual stresses and microhardness stabilization in the as-built condition
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