Miguel Freitas

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This paper proposes a new microblogging architecture based on peer-to-peer networks overlays. The proposed platform is comprised of three mostly independent overlay networks. The first provides distributed user registration and authentication and is based on the Bitcoin protocol. The second one is a Distributed Hash Table (DHT) overlay network providing(More)
The robot presented in this paper was designed to find damages to the external sheath of offshore pipelines. The pipeline section subject to inspection is known as “riser” and connects the pipe running on the seabed to the production facility at the platform or “floating production, storage and offloading” ship (FPSO). When(More)
The physical topology design (PTD) of optical networks is typically obtained as solution to a mixed integer linear program (MILP) that optimizes a performance measure, such as link length, total number of hops, maximum link load, number of wavelengths, etc. In this work, we investigate a multi- objective formulation to compute the Pareto set of solutions(More)
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