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Role of S[(123)〈634〉] orientations in the preferred nucleation of cube grains in recrystallization of FCC metals
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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
Friction stir processing of AZ31 magnesium alloy
No full textMagnesium alloys are known to be one of the lightest structural alloys and hence they are of interest to the potential applications in aerospace and automobile industry. However, widescale commercial usage of magnesium alloys is limited given its low formability at room temperature. Conventional processing techniques fail to alter the formability and other mechanical properties significantly. A severe plastic deformation processing technique called friction stir processing (FSP) developed on the principles of friction stir welding (FSW) is touted to significantly change the microstructure, texture and hence the mechanical properties of magnesium alloys. This thesis is primarily based on investigating the mechanisms of microstructure and texture evolution during FSP of a commercial AZ31 magnesium alloy. The work presented in the thesis comprise of four projects, all under the broad theme of investigating the microstructure and texture evolution in AZ31 alloy: (i) Microstructural origin of friction stir processed zone in a magnesium alloy, (ii) Microstructural evolution during multipass friction stir processing of a magnesium alloy, (iii) Friction stir processing under different thermal history, and (iv) Study of grain structure evolution during annealing of a twin roll cast AZ31 Mg alloy. In (i) microstructural and texture evolution at the edge regions of a friction stir processed (FSP) magnesium alloy AZ31 was studied which was aimed at explaining the mechanism of the microstructural evolution during FSP. A model of microstructural development through grain boundary sliding of the ultra-fine grains was proposed based on the texture and microstructural observations in the concerned regions. Further, in (ii) the microstructure and texture developments and also prediction of texture using visco-plasticself-consistent (VPSC) modelling of commercial magnesium alloy AZ31 being friction stir processed through multi-pass and multi-directional (unidirectional, reverse and transverse tool movements) was studied. Later, in (iii) the effect of various coolant mediums viz. air, liquid nitrogen and water on the microstructural and thermal profiles in the friction stir processed zone was investigated. Experimental observations, on the process zone dimensions and temperature profiles, showed significant differences: which highlighted the effect of the thermal history. A numerical simulation was made using multi-physics finite element method. A three-dimensional steady-state coupled laminar fluid flow and heat transfer model was developed, which could capture the experimentally observed process zone dimensions and temperature profiles. Lastly, in (iv) evolution of microstructure under static annealing at 300°C and 500°C for different times of twin-roll-cast (TRC) magnesium alloy AZ31 was outlined. Grain path envelope analysis was used for quantitatively analyzing the microstructural evolution. Twin-rolled structure had bimodal grain size which was preserved after annealing at 300°C. However, annealing at 500°C led to a unimodal grain size. A deformation induced recrystallization recovery (DIRR) model was proposed which could explain the observed microstructural features.Thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy of the Indian Institute of Technology Bombay, India and Monash University, Australia
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
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