1,720,964 research outputs found
Advanced Models & Tools for Inbound & Outbound Logistics in Supply Chain
Full text linkThe present Ph.D. Thesis is focused on Inbound & Outbound Logistics in Supply Chain, specifically on issues regarding the configuration of a generic multi stage distribution network, determination of fulfilment policies and material flows, the optimal daily allocation of customer demand, and the following design, management and optimization of storage systems, especially for the storage allocation of order picking systems.
The set of methodological hierarchical approaches and methods introduced in the present research aim to became a modelling system to integrate the main supply chain management decisions. In particular this modelling system groups concepts about integrated planning proposed by operations research practitioners, logistics experts, and strategists over the past 40 years. Indeed it refers to functional coordination within the firm, between the firm and its suppliers, and between the firm and its customers. It also refers to inter-temporal coordination of supply chain decisions as they relate to the firm’s operational, tactical and strategic plans.
The modelling system following a top down approach starts with limited detail of the big picture, that is the physical design of a supply network, and then, after a rough first design is outlined, looking inside storage systems, where the design is refined. This is essentially as breaking down a distribution network to gain insight into its compositional sub-systems (i.e. distribution centers).
Various frameworks, models, heuristics, and software tools are introduced and discussed in the following chapters. Significant case studies are given to demonstrate the effectiveness of the proposed tools.
Finally the goal of this thesis is to present a set of advanced models and tools for the design and control of an integrated supply chain. This set of methods and tools have the ambition to replace the basic rules-of-thumb too often in use in supply chain management practice.La presente tesi di dottorato è basata sulla logistica inbound ed outbound nei sistemi di imprese, relativamente alle tematiche riguardanti la configurazione di reti distributive multi livello, la determinazione dei relativi flussi logistici, l’allocazione ottimale della domanda, e la successiva progettazione, gestione ed ottimizzazione dei sistemi di stoccaggio (centri distributivi), specialmente per quel che riguarda l’allocazione della merce nei sistemi di order picking.
La serie di approcci metodologici di tipo gerarchico presentati in questa ricerca mirano a diventare un sistema di modellazione che integra le principali decisioni del supply chain management. Nello specifico il sistema di modellazione raggruppa i concetti tipici della pianificazione integrata così come è stata sviluppata nel corso degli ultimi 40 anni dai professionisti di ricerca operativa, dagli specialisti della logistica e dagli esperti di strategia aziendale. Infatti, tale sistema di modellazione si basa sia sul concetto di coordinamento funzionale tra imprese, tra l’impresa ed i suoi fornitori e tra l’impresa ed i suoi clienti, sia sul concetto di coordinamento intertemporale delle decisioni di supply chain, poiché considera la pianificazione operativa, tattica e strategica dell’azienda.
Il sistema di modellazione presentato nella tesi, seguendo un approccio top down, inizia con il delineare la struttura fisica e la configurazione del network distributivo attraverso un numero limitato di elementi, conseguentemente la progettazione è raffinata aumentando il grado di dettaglio, spingendosi fino alla progettazione dei centri di distribuzione, anello essenziale di ogni rete distributiva.
Nei seguenti capitoli sono presentati e discussi vari modelli, euristiche originali, framework e strumenti software. Alcuni significativi casi studio sono illustrati per dimostrare l’efficacia del sistema di modellazione proposto.
In definitiva lo scopo ultimo di questa tesi è quello di presentare un insieme di modelli e strumenti avanzati per la progettazione integrata ed il controllo della supply chain che possano essere di riferimento ed in sostituzione alle approssimative regole empiriche troppo spesso utilizzate nella pratica del supply chain management
Piattaforma software per la progettazione assistita di un impianto di stoccaggio e la scelta dell'allocazione della merce secondo i principi della correlated storage allocation
No full text[RELAZIONE
The strategic role of spare parts availability and facility location on maintenance in industrial systems
No full textThe ISSAT International Conference on Reliability and Quality in Design is an international forum for presentation of new results, research development, and applications in reliability and quality
in design. Papers may address any aspect of reliability and quality in design. Papers dealing with case studies, experimental results, or applications of new or well-known theory to the solution of actual reliability and quality problems in engineering design are of particular interest
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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