1,721,048 research outputs found
Cost-Benefit Analysis of Single Unit Systems Using Matlab
No full textThe present chapter focuses on the development of a stochastic model for a one-unit system in which unit fails completely either directly from normal mode or via partial failure. The partially failed operating unit is shutdown after a maximum operation time for preventive maintenance (PM). There is a single server who attends the system immediately whenever needed. The unit becomes degraded after repair. The server inspects the degraded unit at its failure to see the feasibility of repair. If the repair of the degraded unit is not feasible, it is replaced by new unit. The distributions of failure, maximum rate of operation times, preventive maintenance, inspection and repair time of the unit are arbitrary distributed. By using regenerative point technique some reliability characteristic of interest are also obtained
Study of Industrial Systems Using Supplementary Variable Technique
No full textM.Sc. (Mathematics and Computing)The whole range of our work reported in this dissertation is covered into four chapters which are
described as:
Chapter-1: This Chapter is introductory in nature and contains the basic concepts including reliability
engineering, reliability theory and modeling, system configurations, Lagrange’s Method and Runge-kutta
4th order Method.
Chapter-2:
This Chapter discusses the comparison between the availability of a pipe manufacturing industry when
the Sub-Systems are subjected to simultaneously and independent failure. The failure rates of the
subsystem are constant and repair rates are variable. Availability analysis of a system can benefit the
industry in terms of higher productivity and low maintenance cost. It is possible to improve the
availability of the of the plant with proper maintenance planning and monitoring. Reliability analysis
helps us to obtain the necessary information about the control of various parameters.
Chapter-3:
The main intension of this Chapter is to develop and analyze a reliability model for polytube industry
using supplementary variable technique. A mathematical model for the system is given in the form of
differential difference equations and solved for obtaining steady state availability. The effect of various
subsystems on the availability is also studied taking numerical data.
Chapter-4:
In this Chapter we discuss the finding of Chapter-2 and Chapter-3.School of Mathematics and Computer Applications, Thapar University, Patial
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
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
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Resilience during the COVID-19 pandemic: The Alstom Bombardier transportation acquisition
No full textIn January 2021, Alstom announced the completion of its acquisition of Bombardier Transportation (BT), a deal worth €5.5bn first announced a year earlier, just before the global COVID-19 outbreak. The success of Alstom’s large-scale cross-border acquisition of BT is a remarkable demonstration of corporate resilience. This case study contributes to the literature by examining corporate resilience, in particular Mergers and Acquisitions (M&A) in the context of various risks and uncertainties such as macroeconomic and regulatory risks, as well as the uncertainty caused by the COVID-19 crisis. In the face of these risks and uncertainties, Alstom managed to build resilience by successfully implementing a range of strategies and effectively leveraging key capabilities which enabled it to complete its acquisition of BT
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