Search results for " Computer Science"

A Branch-and-Cut method for the Capacitated Location-Routing Problem

2011

International audience; Recent researches in the design of logistic networks have shown that the overall distribution cost may be excessive if routing decisions are ignored when locating depots. The Location-Routing Problem (LRP) overcomes this drawback by simultaneously tackling location and routing decisions. The aim of this paper is to propose an exact approach based on a Branch-and-Cut algorithm for solving the LRP with capacity constraints on depots and vehicles. The proposed method is based on a zero-one linear model strengthened by new families of valid inequalities. The computational evaluation on three sets of instances (34 instances in total), with 5–10 potential depots and 20–88 …

Vers une aide à la mobilité basée sur la connaissance de l'espace pour les personnes ayant une déficience visuelle

2018

International audience; Cette communication présente un nouveau concept de dispositif d'assistance à la mobilité pour les personnes présentant une incapacité visuelle (PPIV), son implantation dans un simulateur, et son évaluation préliminaire. Ce système, ACCESSPACE, permet de représenter l'essentiel (gist) de l'agencement spatial des alentours immédiats de l'utilisateur, sur une tablette à stimulation tactile. En combinant des données cartographiques, GPS et visuelles, ce système effectue un bi-partitionnement de l'espace (en zones accessibles ou non) et transmet cette information sous forme d'une carte égocentrée augmentée, évoluant en temps réel avec les mouvements de l'utilisateur. L'év…

Lidar : traitement avancé des données et interprétation archéologique - cours 2016

2016

E-Learning Experiences in La Ribera Health Department

2014

This paper shows how the training of health professionals is improving thanks to the use of new technologies, in particular e-learning. This type of technology is widely used in medical education and there are multiple research works that report its effective deployment by health professionals and students. However, there is a need to incorporate e-learning platforms and online methods in healthcare organizations through a systematic and rigorous approach what is proposed in the current work. This approach has been applied since 2009 in the context of La Ribera Health Department implementing a high number of e-learning experiences. The obtained outcomes reveal how useful have been these exp…

Earth System Chemistry integrated Modelling (ESCiMo) with the Modular Earth Submodel System (MESSy) version 2.51

2016

Abstract. Three types of reference simulations, as recommended by the Chemistry–Climate Model Initiative (CCMI), have been performed with version 2.51 of the European Centre for Medium-Range Weather Forecasts – Hamburg (ECHAM)/Modular Earth Submodel System (MESSy) Atmospheric Chemistry (EMAC) model: hindcast simulations (1950–2011), hindcast simulations with specified dynamics (1979–2013), i.e. nudged towards ERA-Interim reanalysis data, and combined hindcast and projection simulations (1950–2100). The manuscript summarizes the updates of the model system and details the different model set-ups used, including the on-line calculated diagnostics. Simulations have been performed with two diff…

The on-line coupled atmospheric chemistry model system MECO(n) – Part 5: Expanding the Multi-Model-Driver (MMD v2.0) for 2-way data exchange includin…

2018

Abstract. As part of the Modular Earth Submodel System (MESSy), the Multi-Model-Driver (MMD v1.0) was developed to couple online the regional Consortium for Small-scale Modeling (COSMO) model into a driving model, which can be either the regional COSMO model or the global European Centre Hamburg general circulation model (ECHAM) (see Part 2 of the model documentation). The coupled system is called MECO(n), i.e., MESSy-fied ECHAM and COSMO models nested n times. In this article, which is part of the model documentation of the MECO(n) system, the second generation of MMD is introduced. MMD comprises the message-passing infrastructure required for the parallel execution (multiple programme mul…

A Survey on Gaussian Processes for Earth-Observation Data Analysis: A Comprehensive Investigation

2016

Gaussian processes (GPs) have experienced tremendous success in biogeophysical parameter retrieval in the last few years. GPs constitute a solid Bayesian framework to consistently formulate many function approximation problems. This article reviews the main theoretical GP developments in the field, considering new algorithms that respect signal and noise characteristics, extract knowledge via automatic relevance kernels to yield feature rankings automatically, and allow applicability of associated uncertainty intervals to transport GP models in space and time that can be used to uncover causal relations between variables and can encode physically meaningful prior knowledge via radiative tra…

Chapter 4</br>Will our children have the chance to do research on today’s digital books?

2016

In this chapter, I will first position my considerations about the sustainability of ebooks for future research in the context of book history; moreover, I will introduce basic concepts of (migration and emulation) as well as challenges to the long-term preservation of digital data in greater generality. After that and taking current research on past (printed) books as an analogy, I shall try to outline which kinds of (digital) material will be indispensable in the future to do research on today's digital book production: published digital materials and unique (digital) artefacts. Finally, I shall present the results of my exemplary studies to find out which precautions for the future avail…

A Top-Down Approach Based on Business Patterns for Web Information Systems Design

2009

International audience; In this paper we develop an approach that is based on a top-down strategy to realization of transactional web services. Our approach highlights non-functional properties (e.g., traceability, security) which are essential to preserving an application's quality. It is implemented in three steps. The first step is a breakdown of the application in accordance with a related business involved. The goal of this step is to have sets of actors and activity patterns defined as an activity workflow that support the architecture of the application. The next step allows developing a mapping of the activity pattern on this architecture. The aim of this step is to identify the ris…

Towards E-Government in a Sub-Saharan African Country

2006

ABSTRACT The use of information communication technologies (ICT) in governance is growing rapidly in many parts of the world. Developing countries in Africa are also making efforts to harness the new technology. In this paper, we provide useful insights regarding the impediments and initiatives of e-government in Nigeria, a Sub-Saharan African (SSA) country. The main problems facing the emergence of e-government in Nigeria have their roots in socioeconomic inadequacies that have plagued several countries in the SSA region. Some of the problems discussed include poor organizational skills, attitudinal problems, inadequate infrastructural support, and poor or unavailable human capital resourc…