Search results for "GiST"

Measuring diversity. A review and an empirical analysis

2021

Abstract Maximum diversity problems arise in many practical settings from facility location to social networks, and constitute an important class of NP-hard problems in combinatorial optimization. There has been a growing interest in these problems in recent years, and different mathematical programming models have been proposed to capture the notion of diversity. They basically consist of selecting a subset of elements of a given set in such a way that a measure based on their pairwise distances is maximized to achieve dispersion or representativeness. In this paper, we perform an exhaustive comparison of four mathematical models to achieve diversity over the public domain library MDPLIB, …

PRIVANET: An Efficient Pseudonym Changing and Management Framework for Vehicular Ad-Hoc Networks

2020

Protecting the location privacy is one of the main challenges in vehicular ad-hoc networks (VANETs). Although, standardization bodies, such as IEEE and ETSI, have adopted a pseudonym-based scheme as a solution for this problem, an efficient pseudonym changing and management is still an open issue. In this paper, we propose PRIVANET, a complete and efficient pseudonym changing and management framework. The PRIVANET has a hierarchical structure and considers the vehicular geographic area as a grid. Each cell of this grid contains one or many logical zones, called vehicular location privacy zones (VLPZs). These zones can easily be deployed over the widespread roadside infrastructures (RIs), su…

El componente pragmático en los diccionarios: Implicaciones para la Lexicografía

2015

Dictionaries are a list of words, simple or complex, that are treated as entries (lexical items). It is usual to assert several components: the lemma or headword, named after its most neutral form, followed by an indication of the main inflections of its category: genre and number if they are names, syntactic class if they are verbs. Sometimes, indications of it are made in other aspects: etymology, pronunciation, marks of placement, area of use, register, frequency of use, etc.Among all the group, it is pointed out an area that grows daily, painstakingly, in lexicographic works: the pragmatic component. Most of the words are referential (names, verbs, adverbs), but others correspond to lan…

Plan d’action suffragiste en faveur de la cause féminine: femmes rédactrices, catalyseurs des réformes sociales et politiques dans l’Angleterre victo…

2019

National audience; La suppression du droit de timbre en 1855 et des taxes sur le papier en 1861, en Angleterre, favorise la création de plusieurs organes de presse dont le magazine féministe The Englishwoman’s Journal (1858-1864). Sa stratégie éditoriale consiste à promouvoir les analyses critiques des journalistes de sexe féminin contre les politiques conservatrices anglaises concernant la condition féminine. Les co-fondatrices du groupe de Langham Place, Barbara Leigh Smith (1827-1891) et Bessie Rayner Parkes (1829-1925), donnent la parole à la communauté féminine qui n’a de véritable possibilité d’expression et de communication que l’écriture. Se dégageant de toute restriction d’expressi…

Logistics Competences within World Class Supply Chains Concept

2017

In the recent years, within the business management area, one may notice an increasing importance of a firm’s competences in achieving the expected market and economic outcomes leading to business success as well as to business competitive advantage. Within business management an increasing role is often assigned to business logistics concept. Among the firm’s competences, an important role is played by logistics competences. The aim of the article is to present the results of the research conducted by European Logistics Association (ELA) and A.T. Kearney, concerning the place and role of logistics competences within World Class Supply Chains concept. Logistics competences are the long-term…

Closed-loop supply chains: What reverse logistics factors influence performance?

2016

This paper analyses the inventory and order flow dynamics in closed-loop supply chains (CLSCs). In this kind of supply chains the reverse flow of materials entering the system for recycling purposes complicates the way in which inventories should be managed and replenishment policies should be designed. Specifically, we analyse the relationships between some reverse logistics’ factors (remanufacturing lead-time, return rate of recycled products, reverse order policy, and number of supply chain tiers) on the order and inventory variance amplification. We firstly perform a systematic literature review of the related studies. Secondly, by adopting a difference equation math approach and design…

A journey into the information Typhoon: Typhoon Haiyan DRL Field Report Findings and Research Insights:

2013

Global organizations and supply chain: new research avenues in the international human resource management

2014

Purpose– The purpose of this paper is to aim at proposing a research agenda in the intersection of strategic supply chain management and logistics (SCML) of global organizations from the perspective of international human resource management (IHRM).Design/methodology/approach– To disclose the intellectual structure of research to date across both fields, the content of up to 280 articles dealing with IHRM and 174 papers addressing challenges in SCML in global organizations from a human resource management (HRM) viewpoint were analyzed. A stepwise hierarchical cluster and discriminant analysis were conducted to map a joint research agenda. Approaches from Upper Echelons theory and Co-Evoluti…

Impact of reverse logistics on supply chain performance

2013

Purpose – The purpose of this paper is to analyse the impact of reverse logistics on order and inventory variance amplification in a single-echelon supply chain (SC) and to propose a new order policy for dampening such amplification. Design/methodology/approach – A general review of the literature on sustainable operations and on the impact of reverse logistics on SC performance provides the foundation for the study. The authors use difference equation math approach for modelling and analysing a closed SC. A proper design of experiment and data collected from the European Union statistics validate the obtained numerical results. Findings – The variability of reverse flow in a closed loop S…

A Behavioral Approach for Logistics System Analysis and Design: A Reverse Logistics Case

2002

Traditional logistic system analysis quite often assumes a single decisionmaker (the planner) operating in a state of complete information and full decision power. He pursues the objective of designing an efficient logistic network by solving a sequence of operational problems mainly in the form of optimization models. More realistically, one should consider that the decision power is actually distributed within the logistics system among different actors (agents or holons) having different (conflictual or cooperative) goals, following different behavioural rules and generating interdipendencies. The shift from a SAS (single-agent system) approach to a MAS (multi-agent system) one induces s…