1,721,038 research outputs found
Maintenance strategy selection: a comparison between fuzzy logic and analytic hierarchy process
No full textContinued pressure on companies to reduce costs and improve customer satisfaction has resulted in increasingly detailed examinations of maintenance practices and strategies. At the same time, the role of maintenance nowadays is shifting from the traditional necessary evil to a business chance. However, even if research in this area is on the rise nowadays, little work has been done in order to provide a model for the selection of the suitable maintenance strategy for each piece of equipment. This paper shows a comparison between two techniques, Analytic Hierarchy Process and Fuzzy Logic, as Multi Criteria Decision Methods useful for selecting the most suitable maintenance strategy. The two models have been applied to a real case study carried out in an Italian manufacturing firm
Deklaratywny model wielorobotowego systemu inspekcji pomieszczeń zamkniętych
No full textTyt. z nagłówka.Bibliogr. s.90.Dostępny również w formie drukowanej.STRESZCZENIE: Rozważany problem doboru, alokacji i planowania działań grupy robotów mobilnych w środowisku pomieszczeń zamkniętych sformułowany został w modelu deklaratywnym. Dla zadanego zbioru zmiennych decyzyjnych charakteryzujących środowisko pomieszczeń zamkniętych z nieruchomymi i poruszającymi się przeszkodami, a także dla floty robotów mobilnych oraz zbioru ograniczeń wiążących zmienne, poszukiwana jest strategia planowania struktury i alokacji robotów warunkująca inspekcję zadanej liczby pomieszczeń w określonym horyzoncie czasu. Proponowane podejście zostało zilustrowane na załączonym przykładzie. SŁOWA KLUCZOWE: wieloobrotowe systemy inspekcyjne, roboty mobilne, model deklaratywny, ruchome przeszkody. ABSTRACT: Declarative modeling provides attractive perspective for integrated approach to selection, docking and routing planning of multi mobile robot inspection system problem formulation. For given set of decision variables describing indoor environment (ncluding stationary and movable obstacles) and acting robots as well as the set of constraints limiting these variables robots' navigation strategy is sought out. The solution should respond to the question: what kind and how many and in which way initially docked robots enable to inspect a given indoor environment within a given time horizon? The approach proposed is illustrated on an example attached. KEYWORDS: multi mobile robot system, indoor inspection, constraints programming
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
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
CP-driven production process planning in multiproject environment
No full textTyt. z nagłówka.References p. 31-32.Dostępny również w wersji drukowanej.ABSTRACT: The way enterprise capabilities are used decides about its competitiveness among other ones. In that context modeling aimed at production tasks allocation planning plays a crucial role especially at concurrently executed production orders. The introduced reference model employing constraint programming (CP) paradigm describes both an enterprise and a set of project-like production orders. Moreover, encompassing consumer orders requirements and available production capabilities, the model provides the formal framework allowing one to develop a class of decision support systems aimed at interactive production process planning subject to multiproject environment constraints. In that context our contribution is a knowledge-based and CP-driven approach to resource allocation assuming precise character of decision variables. The conditions sufficient for deadlock avoidance are the main goal. The conditions delivered provide formal framework for developing a task oriented Decision Support Tool for Project Portfolio Prototyping (DST4P, Banaszak 2006). The tool provides a prompt and interactive service to a set of routine queries formulated either in straight or reverse way. KEYWORDS: projects portfolio, support system, constraints programming, scheduling
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