1,720,987 research outputs found
Optimization of logistics in industrial districts through creation of a community of agents
No full texthe aim of this paper is to find an optimal solution for freight transportation in an industrial district taking into account the point of view both of agents and customers, and trying to reduce the environmental pollution. We propose a system architecture that drives agents to cooperate in minimizing costs, and environmental negative impacts. The idea is to achieve an optimization of logistics by setting up a community made of district enterprises. We address the situation in which a virtual coordinator helps the agents to reach an agreement among each other. The objectives are: maximizing customers satisfaction, and minimizing the number of trucks needed. A fuzzy clustering, a fuzzy/genetic system and a greedy algorithm are thus proposed to achieve these objectives, and eventually an algorithm to solve the Travelling Salesman Problem
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
Dynamic Time Warping and Cross Correlation for the estimation of cell movements in conjunctival capillaries: a comparison through simulation
No full textWe wish to assess the performance of an automatic analysis of video sequences of conjunctival vessels, digitally imaged with high enough magnification to resolve movement of the blood within the vessel. With a previously developed algorithm, from each vessel and from each frame we extract a one dimensional signal representing the longitudinal variation of gray level along the vessel, which is related to the presence of red blood cells. Then we estimate the local shift of the signals of a vessel between different frames, using a modified dynamic-time-warping approach. Since manual tracking of cells on a large batch of real video is unfeasible, we assess the performance of the algorithm on set of simulated vessels, where the mean cell velocity is known. By this means, we are also able to vary the mean blood cells velocity and the frequency of their velocity variation in time, so as to study the error variation with regard to these variables. We show the effectiveness of our method comparing it with a cross correlation approach. Moreover, along with the estimation error and robustness toward changes in the mean cells velocity, we show that at variance with the cross correlation method, the proposed algorithm is able to provide estimates on instantaneous velocity with an acceptable error, even if suffering from an overestimation bias that increases with the cells mean velocity
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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