Scalable Middleware Environment for Agent-Based Internet Applications

Abstract. The AgentScape middleware is designed to support deployment of agent-based applications on Internet-scale distributed systems. With the design of AgentScape, three dimensions of scalability are considered: size of distributed system, geographical distance between resources, and number of administrative domains. This paper reports on the AgentScape design requirements and decisions, its architecture, and its components.

Analysis of Air Traffic Controllers Decisions

International audienceThis paper presents an approach based on a multiple criteria decision making methodology (MCDM) to analyse the decisions of Air Traffic Controllers. This study will allow to model some tools able to assist the controllers in their tasks and particularly able to help them to assume the ceaseless increase of Air Traffic. Currently the platform AMANDA assists controllers on only one sector of control. This platform was very pleasant welcome, and we wish to extend these principles to adjacent sectors, and thus include tool to help the cooperation between adjacent controllers. This analysis is composed of three main points. First it is necessary to determine the decision making process of controllers. The second point consists of the application of the MCDM which guide all the study. And finally a repertory grid technique is applied in order to support the operational aspect of MCDM and to support the interviews. We begin this paper by a presentation of Air traffic Control and the problematic, we present then AMANDA and its principles, and the objectives for the new version. In a third part we describe the approach developed and a real example of its application, the results and analyses that we can deduce of this first grid are also presented. These results must be, of course, confirmed and validated by the controllers

Mobile Robot as Physical Agent of Intelligent Space

The Intelligent Space is an area (room, public space, etc.) that has networked distributed sensors, which can be used for observing and gathering information from the space. The main objective for the introduction of Intelligent Space is to provide services to humans inside the space. These services can be either informational, such as the ones provided by displays, or physical. In order to be able to provide physical services mobile robots are introduced in the Intelligent Space as actuators. The network of distributed sensors in the space can therefore be utilized to provide data from the space needed for the control of the robot. Here we present our implementation of an Intelligent Space system that uses spatially distributed laser range finders for tracking the mobile robot and humans inside the space and building the map of the space. Based on these measurements the control of mobile robot acting as physical agent of the Intelligent Space is developed

ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ АНАЛИЗА МЕДИКО-БИОЛОГИЧЕСКИХ ДАННЫХ В ДЕТСКОЙ ЛЕЙКОЗОЛОГИИ

Рассматриваются две информационные технологии, реализованные в виде соответствующих программных комплексов и предназначенные для анализа многомерных медико-биологических данных: первая – система анализа данных, реализующая комплекс разнообразных статистических и нейросетевых методов на основных стадиях обработки данных; вторая –  система классификации групп риска  пациентов на основе гибридной нечеткой классификационной модели, обеспечивающей построение нескольких подмножеств Парето-оптимальных компактных и хорошо интерпретируемых классифицирующих правил

ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ АНАЛИЗА МЕДИКО-БИОЛОГИЧЕСКИХ ДАННЫХ В ДЕТСКОЙ ЛЕЙКОЗОЛОГИИ

Рассматриваются две информационные технологии, реализованные в виде соответствующих программных комплексов и предназначенные для анализа многомерных медико-биологических данных: первая – система анализа данных, реализующая комплекс разнообразных статистических и нейросетевых методов на основных стадиях обработки данных; вторая –  система классификации групп риска  пациентов на основе гибридной нечеткой классификационной модели, обеспечивающей построение нескольких подмножеств Парето-оптимальных компактных и хорошо интерпретируемых классифицирующих правил

Vers une modélisation des systèmes coopératifs

International audienceDans le cadre de la coopération homme-homme, les agents humains construisent et maintiennent une représentation partagée de la situation par l'intermédiaire d'échanges verbaux. Cette représentation a été appelée Référentiel Commun, mais n'est que virtuelle. Dans le cadre de la coopération homme-machine, il est nécessaire de rendre opérationnel ce Référentiel Commun. C'est ce que nous présentons dans ce papier, où une expérimentation a permis de définir de manière exacte son contenu dans le cadre du contrôle de trafic aérien, ce qui a permis de bâtir un modèle de système coopératif que nous présentons ici

Continuization of Timed Petri Nets: From Performance Evaluation to Observation and Control

Abstract. State explosion is a fundamental problem in the analysis and synthesis of discrete event systems. Continuous Petri nets can be seen as a relaxation of discrete models allowing more efficient (in some cases polynomial time) analysis and synthesis algorithms. Nevertheless computational costs can be reduced at the expense of the analyzability of some properties. Even more, some net systems do not allow any kind of continuization. The present work first considers these aspects and some of the alternative formalisms usable for continuous relaxations of discrete systems. Particular emphasis is done later on the presentation of some results concerning performance evaluation, parametric design and marking (i.e., state) observation and control. Even if a significant amount of results are available today for continuous net systems, many essential issues are still not solved. A list of some of these are given in the introduction as an invitation to work on them.

Self-adaptive Grid Resource Monitoring and discovery

The Grid provides a novel platform where the scientific and engineering communities can share data and computation across multiple administrative domains. There are several key services that must be offered by Grid middleware; one of them being the Grid Information Service( GIS). A GIS is a Grid middleware component which maintains information about hardware, software, services and people participating in a virtual organisation( VO). There is an inherent need in these systems for the delivery of reliable performance. This thesis describes a number of approaches which detail the development and application of a suite of benchmarks for the prediction of the process of resource discovery and monitoring on the Grid. A series of experimental studies of the characterisation of performance using benchmarking, are carried out. Several novel predictive algorithms are presented and evaluated in terms of their predictive error. Furthermore, predictive methods are developed which describe the behaviour of MDS2 for a variable number of user requests. The MDS is also extended to include job information from a local scheduler; this information is queried using requests of greatly varying complexity. The response of the MDS to these queries is then assessed in terms of several performance metrics. The benchmarking of the dynamic nature of information within MDS3 which is based on the Open Grid Services Architecture (OGSA), and also the successor to MDS2, is also carried out. The performance of both the pull and push query mechanisms is analysed. GridAdapt (Self-adaptive Grid Resource Monitoring) is a new system that is proposed, built upon the Globus MDS3 benchmarking. It offers self-adaptation, autonomy and admission control at the Index Service, whilst ensuring that the MIDS is not overloaded and can meet its quality-of-service,f or example,i n terms of its average response time for servicing synchronous queries and the total number of queries returned per unit time

Agent-Based Mediated Service Negotiation

Brazier, F.M.T. [Promotor]Overeinder, B.J. [Copromotor

Self-adaptive Grid Resource Monitoring and discovery

The Grid provides a novel platform where the scientific and engineering communities can share data and computation across multiple administrative domains. There are several key services that must be offered by Grid middleware; one of them being the Grid Information Service( GIS). A GIS is a Grid middleware component which maintains information about hardware, software, services and people participating in a virtual organisation( VO). There is an inherent need in these systems for the delivery of reliable performance. This thesis describes a number of approaches which detail the development and application of a suite of benchmarks for the prediction of the process of resource discovery and monitoring on the Grid. A series of experimental studies of the characterisation of performance using benchmarking, are carried out. Several novel predictive algorithms are presented and evaluated in terms of their predictive error. Furthermore, predictive methods are developed which describe the behaviour of MDS2 for a variable number of user requests. The MDS is also extended to include job information from a local scheduler; this information is queried using requests of greatly varying complexity. The response of the MDS to these queries is then assessed in terms of several performance metrics. The benchmarking of the dynamic nature of information within MDS3 which is based on the Open Grid Services Architecture (OGSA), and also the successor to MDS2, is also carried out. The performance of both the pull and push query mechanisms is analysed. GridAdapt (Self-adaptive Grid Resource Monitoring) is a new system that is proposed, built upon the Globus MDS3 benchmarking. It offers self-adaptation, autonomy and admission control at the Index Service, whilst ensuring that the MIDS is not overloaded and can meet its quality-of-service,f or example,i n terms of its average response time for servicing synchronous queries and the total number of queries returned per unit time.EThOS - Electronic Theses Online ServiceUniversity of Warwick (UoW)GBUnited Kingdo