1,720,974 research outputs found
Adil Baykasoglu and Nabil N.Z. Gindy LOADING FLEXIBLE CELLS: TABU SEARCH BASED SIMULATION OPTIMISATION APPROACH
No full textIn this work a tabu search-based "multi-objective simulation optimisation model " is proposed for loading flexible cell production systems. The problem is formally stated as a goal-programming model hybrid in nature. Some objectives and parameters are determined analytically others are determined from the developed simulation model. The model is solved utilising a tabu search algorithm developed by the author. In the developed methodology parts are assigned to the cells to achieve required performance levels. A capabilitybased approach is used to define processing requirements of products and processing capabilities of production resources. Parts are assigned to cells such that load is balanced between cells and individual production resources within the cells, cell interactions are kept to a minimum, required system performance levels satisfied (when feasible). Example application is provided to explain the developed methodology. 1
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
Evaluating the basic load consolidation strategies for a transportation company through logistics process modelling and simulation
No full textLand transportation managers face some difficulties especially for operating decisions which are about load/capacity/route planning. Load consolidation is a widely used practice in transportation. Load consolidation is grouping of several small shipments into one container while satisfying logistics system constraints. In this paper, two simple load consolidation approaches, which are known as 'quantity-based consolidation' and 'time and quantity-based consolidation' are evaluated. These approaches are 'non-recurrent', in which the logistics system has a 'target time' or 'target weight' before the accumulation of the orders. Some performance measures for these methods are investigated through a case study. The study is performed in a 3P-logistics company operating from Gaziantep. Due to the complexity of the logistics processes, effects of the load consolidation methods are evaluated via process modelling and simulation. The performance results of load consolidation methods are compared in order to support decisions made by the management of company.load consolidation; land transport; logistics; business process modelling; simulation; Turkey; transportation management; load planning; route planning; capacity planning.
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
Design optimization with chaos embedded great deluge algorithm
No full textIn this paper, the great deluge algorithm (GDA), which has not been previously used in constrained mechanical design optimization problems is employed to solve several design optimization problems selected from the literature. The GDA algorithm needs only one basic parameter to setup, which makes it very attractive for solving optimization problems. First time in this paper, an attempt is made to see whether it is possible to enhance the performance of a very simple algorithm like GDA to solve complex constrained non-linear design optimization problems by embedding chaotic maps in its neighborhood generation mechanism. Eight different chaotic maps are tested and compared in this paper. It is observed that chaotic maps can considerably improve the performance of GDA and enables it to find the best possible solutions for the studied problems. (C) 2011 Elsevier B.V. All rights reserved
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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