EGNOS based virtual reference stations

We propose the use of the European Geostationary Navigation Overlay Service (EGNOS) data - real time on line data provided by SISNeT - to develop Virtual Reference Stations and, thus, increase the quality of the Position, Velocity an Time (PVT) solution of receivers unable to interface directly with EGNOS. A Virtual Reference Station (VRS) is a concept where the existence of a differential reference station located near a mobile rover is simulated by software in order to increase the accuracy of the PVT solution of the mobile GNSS receiver.

An IEEE 802.15.4 protocol implementation (in nesC/TinyOS): reference guide v1.0

This technical report is to provide a reference guide to the implementation of the IEEE 802.15.4 protocol in nesC/TinyOS for the MICAz motes. The implementation is provided as a tool that can be used to implement, test and evaluate the current functionalities defined in the protocol standard as well as to enable the development of functionalities not yet implemented and new add-ons to the protocol.

A flexibility reference model to achieve leagility in virtual organizations

The paper proposes a Flexibility Requirements Model and a Factory Templates Framework to support the dynamic Virtual Organization decision-makers in order to reach effective response to the emergent business opportunities ensuring profitability. Through the construction and analysis of the flexibility requirements model, the network managers can achieve and conceive better strategies to model and breed new dynamic VOs. This paper also presents the leagility concept as a new paradigm fit to equip the network management with a hybrid approach that better tackle the performance challenges imposed by the new and competitive business environments.

Contributos legislativos para a criação de empresas cooperativas: a livre fixação do capital social

Num contexto em que as dinâmicas europeias em matéria de empreendedorismo e empresas sociais apelam à melhoria do ambiente legal, este estudo debruça-se sobre a oportunidade da consagração do princípio da livre fixação nos estatutos da cooperativa do montante do capital social. Esta solução legislativa permitirá reduzir os custos de contexto para a constituição da cooperativa e evitar o risco de fuga para formas societárias com regimes mais favoráveis em matéria de capital social mínimo. Constata-se que nas cooperativas, mais intensamente do que nas sociedades comerciais, o capital social mínimo não desempenha eficientemente as funções que lhe são tradicionalmente atribuídas. Conclui-se, igualmente, que a avaliação do nível de capitalização das cooperativas não pode atender apenas a este instituto, devendo ter em conta o património da cooperativa ressalvado para garantia dos credores, com particular destaque para a reserva legal.