1,721,024 research outputs found
A Heuristic for flow-shop scheduling with machine bypass
No full textFlow-shop systems with machine bypass represent production approaches currently widely adopted in several industrial fields (i.e. electronic and belt industries). As a consequence of differences in the manufacturing process, in those systems, jobs are not forced to stop by each machine. Moreover, if a job does not need processing on a machine, it can skip that machine and the very job eventually residing there. In this paper, a new heuristic for solving the flow-shop scheduling problem with machine bypass is presented. The algorithm is able to manage several scheduling performance measures, finding a set of
non-dominated solutions representing the Pareto front. The heuristic integrates a priority rule and a local search procedure with a Multi Attribute Decision Making (MADM) technique in such a way as to drive the search direction towards good trade-off solutions. To show the effectiveness of the proposed approach some computational results are presente
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
OTTIMIZZAZIONE DELLA RETE DI RECUPERO DEI RAEE NELLA PROVINCIA DI REGGIO EMILIA MEDIANTE ANALISI SIMULATIVA
No full textLa gestione del fine vita dei Rifiuti di Apparecchiature Elettriche ed Elettroniche (RAEE) è regolamentata, in Italia, dal D.Lgs. n. 151 del 25 Luglio 2005, che recepisce le direttive europee 2002/96/CEE e 2003/108/CEE. Le nuove direttive, facendo ricadere la responsabilità del recupero sui produttori di Apparecchiature Elettriche ed Elettroniche (AEE) e stabilendo l’obbligo, da parte dei rivenditori, di accettare gli elettrodomestici dismessi in seguito all’acquisto di nuovi prodotti, aumentano la complessità gestionale delle operazioni di raccolta. Emerge, quindi, la necessità di definire una metodologia in grado di ottimizzare le esistenti reti di recupero organizzando le attività di raccolta considerando le esigenze imposte dalla nuova normativa. Nel seguito, si presenta lo studio effettuato in collaborazione con TRED Carpi S.r.l., al fine di ottimizzare la raccolta dei RAEE nella provincia di Reggio Emilia
Complications of thalassemia major and their treatment
No full textThe life of patients with thalassemia has improved both in duration and in quality in industrialized countries. Complications are still common and include heart disease (heart failure and arrhythmias), chronic liver hepatitis, which can evolve in cirrhosis and, rarely, in hepatocellular carcinoma, endocrine problems (hypogonadism, hypothyroidism, diabetes, hypoparathyroidism), stunted growth, osteoporosis, thrombophilia and pseudoxanthoma elasticum. The incidence of complications is decreasing in younger cohorts of patients who have been transfused with blood that has been screened for viruses and thanks to the introduction of new oral iron chelators and imaging methods. The accurate measurement of iron deposits allows better management of iron overload. In addition, therapy for several complications is available. Specialized competence in treating patients with thalassemia is of great importance. © 2011 Expert Reviews Ltd
LA REVERSE LOGISTICS PER L'ABBIGLIAMENTO
No full textI prodotti del sistema moda (vestiti, accessori,...) sono da sempre caratterizzati da un’estrema volatilità delle vendite, che si traduce in un numero significativo di articoli invenduti al termine della stagione. In questo articolo si presenta un magazzino, che, gestendo in maniera efficace ed efficiente la raccolta dei resi di stagione, ha consentito di trasformare una voce di costo in un’occasione diprofitto per l’azienda
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
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