Encontrados 12 documentos, a visualizar página 1 de 2
Gestão da água como um bem económico: aplicação de instrumentos económicos
Araújo, Filipe Augusto Fontes FigueiraDissertação para obtenção do Grau de Mestre em Engenharia do Ambiente ; A crescente escassez de água, associada à necessidade de cumprir objectivos de crescimento económico e de desenvolvimento humano, têm colocado a gestão da água na agenda política. Os conflitos exigem a concepção e estabelecimento de sistemas de gestão capazes de resolver disputas e alocar água entre os diferentes usos, incluindo os diverso...
Conversão de veículos diesel para tração elétrica
Araújo, Filipe Alexandre Simões deTem-se assistido nos últimos tempos a um aumento do preço do crude e este facto tem levado a um decréscimo acentuado na procura de veículos movidos a combustível fóssil, como se verificou nos últimos anos no nosso país. Impõe-se deste modo, uma procura de alternativas à dependência crónica do crude por parte do setor dos transportes e do parque automóvel em geral. O presente trabalho debruçou-se...
Reconfiguração dinâmica estruturada de workflows de serviços web
Araújo, Filipe Jorge da SilvaDissertação para obtenção do Grau de Mestre em Engenharia Informática ; A complexidade crescente dos sistemas distribuídos baseados em serviços requer, cada vez mais, suporte para dinamismo e automatismo, permitindo assim construir sistemas evolutivos mais versáteis e perduráveis. Alguns exemplos são, adição dinâmica de serviços, modificação dinâmica de dependências entre serviços ou substituição dinâmica de s...
Evaluating the performance and intrusiveness of virtual machines for desktop gr...
Domingues, Patrício Rodrigues; Araújo, Filipe; Silva, LuísComunicação apresentada no 3rd Workshop on Desktop Grids and Volunteer Computing Systems, Rome, 2009. ; We experimentally evaluate the performance overhead of the virtual environments VMware Player, QEMU, VirtualPC and VirtualBox on a dual-core machine. Firstly, we assess the performance of a Linux guest OS running on a virtual machine by separately benchmarking the CPU, file I/O and the network bandwidth. The...
Municipal service delivery: the role of transaction costs in the choice between...
Rodrigues, Miguel; Araújo, Filipe; Tavares, António F.Currently, due to their level of proximity and periodic transfers of competences from the national government, local governments are responsible for many services consumed by citizens. Their competences are growing and nowadays include water supply, promotion of regional development, solid waste collection, emergency management, health care, education, land use management, among many others. To cope with all th...
Trends of reform in Portuguese local government: alternative mechanisms in serv...
Rodrigues, Miguel; Araújo, Filipe; Tavares, António F.The influence on local government organization and management of new public management practices promoted by national administrative reforms remains an issue of contention. On one hand, some authors argue that these reforms have produced similar results at both the central and local levels of government (John 2001; Sanderson 2001; Van Gramberg & Teicher 2000). Others consider that the political nature of electe...
Position-based distributed hash tables
Araújo, Filipe João Boavida de Mendonça Machado deIn this thesis we want to create scalable, fault-tolerant and self-configuring dictionaries that can be deployed in a wide range of networks, including highly dynamic networks with frequent membership changes, like peer-to-peer overlay networks or wireless ad hoc networks. In recent years, distributed hash tables (DHTs) have emerged as a solution to implement large-scale dictionaries. However, given the existin...
Single-Step Creation of Localized Delaunay Triangulations
Araújo, Filipe; Rodrigues, LuísA localized Delaunay triangulation owns the following interesting properties for sensor and wireless ad hoc networks: it can be built with localized information, the communication cost imposed by control information is limited, and it supports geographical routing algorithms that offer guaranteed convergence. This paper presents two localized algorithms, FLDT1 and FLDT2, that build a graph called planar localiz...
Survey on Distributed Hash Tables
Araújo, Filipe; Rodrigues, LuísIn this paper we review distributed hash tables (DHTs) that work as overlay networks on top of the IP network. We compare these DHTs under a number of key aspects that concern performance, scalability and self-configurability. Additionally, since these networks are not suitable for wireless ad hoc networks, we shortly review techniques that can be used to take distributed hash tables to wireless environments.
Reforming portuguese local government: a new public management approach
Rodrigues, Miguel; Araújo, FilipeThe last decades represented a severe strike to the public management model associated to the Welfare State. Different pressures from economics, financial, politics and ideological sources motivated the appearance of the so called New Public Management (NPM). Hood (1991) and Pollitt (1990) point out that the NPM introduced market type mechanisms, the adoption of private management practices, competition among p...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||