1,721,109 research outputs found
Centrifugal distortion constants of X2Y6 type of molecules
No full textThe centrifugal distortion constants of bridged Aluminium and Gallium trihalide molecules (dimers) have been evaluated using the force constants calculated on the basis of general valence force field. The results have been discussed in relation to the structure and molecular weight of the molecules.Natarajan A., Somasundaram S. Centrifugal distortion constants of X2Y6 type of molecules. In: Bulletin de la Classe des sciences, tome 66, 1980. pp. 149-153
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
A mathematical model for bend-allowance calculation in automated sheet-metal bending
No full textSheet-metal components are used extensively in the aerospace and the electronic industry, where high precision is an essential requirements for the final products. In precision components, the calculation of the bend allowance is important in arriving at the final dimensions of the developed length of the sheet metal. Bend allowance is defined as the length of the unstretched fiber in the bent portion of the sheet. Any inaccuracy in calculating the bend-allowance parameter during bending may result in increasing the inaccuracy in the final developed length of the sheet. This causes the blank size to be incorrect, which in turn causes the location of bend lines, slots, and holes to be inaccurate. This may cause mismatch in the final assembly also. \ud
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In this paper an attempt has been made to first review the current industrial practice for the calculation of bend allowance. The current empirical methods used to calculate the bend-allowance parameter are examined and the drawbacks associated with them are identified. The highlight of this paper is on a mathematical model which has been developed to calculate the bend-allowance parameter accurately by assuming plane-strain deformation and a rigid-plastic material, considering thinning effects. The effects of temperature and friction are neglected. The bend-allowance parameter is calculated on the basis of material properties such as the yield stress and the strain-hardening exponent, and the tool geometry. The model has been tested with available data in the literature to assess its accuracy
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
CADDS: an automated die design system for sheet-metal blanking
No full textThis article reports on the design and implementation of a \ud
Computer-Aided Die Design System (CADDS) for sheet-metal \ud
blanks. The system is designed by considering several factors, such as the complexity of blank geometry, reduction in scrap material, production requirements, availability of press equipment and standard parts, punch profile complexity, and tool elements manufacturing method. The interaction among these parameters and how they affect designers' decision patterns is described. The system is implemented by interfacing AutoCAD with the higher \ud
level languages FORTRAN 77 and AutoLISP. A database of \ud
standard die elements is created by parametric programming, \ud
which is an enhanced feature of AutoCAD. The greatest \ud
advantage achieved by the system is the rapid generation of the most efficient strip and die layouts, including information about the tool configuration
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