Tese de mestrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2008
Axis of quinary symmetry occur in molecular symmetry, as in the case of fullerenes, and in crystalline symmetry, in the quasicrystals. Minerals with pentagonal faces do not have this element of symmetry, as the pyrite (FeS2) which shows a ridge that is different from the other ones, in any face of the crystal. The purpose of this paper is to demonstrate conceptual differences between pyritohedron and regular pe...
“Copyright © [2010] IEEE. Reprinted from 2010 IEEE International Conference on Communications. ISBN:978-1-4244-6402-9. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained fro...
Internet Protocol (IP) is a standard network layer protocol of the Internet architecture, allowing communication among heterogeneous networks. For a given network to be accessible from the Internet it must have a router that complies with this protocol. Wireless sensor networks have many smart sensing nodes with computational, communication and sensing capabilities. Such smart sensors cooperate to gather releva...
O presente relatório é o resultado final do Estágio Curricular realizado, durante oito meses, no departamento de Projecto na Oliveira & Irmão, S.A. Deste modo, apresenta-se um resumo do Estado da Arte sobre as temáticas da Pesquisa Qualitativa e Metodologias Qualitativas, das quais a Observação Participante e a Entrevista Semi-Estruturada são mais enfatizadas. Através destas metodologias que são analisadas as p...
A Body Sensor Network can sense health parameters directly on the patient’s body, allowing 24/7 monitoring in an unobtrusive way. Several tiny sensors collect and route data to a special sink node. A new intra-vaginal biosensor was developed to study the relation between temperature variations and women health conditions, such as ovulation period, among others. We present a biosensor prototype and some initial ...
“Copyright © [2009] IEEE. Reprinted from First International Conference on Advances in System Simulation.ISBN:978-1-4244-4863-0. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be ob...
“Copyright © [2009] IEEE. Reprinted from 5th International Conference on Wireless and Mobile Computing, Networking and Communications. WIMOB 2009. ISBN: 978-0-7695-3841-9 . This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective ...
Increasing demand of mobile applications for on-site data acquisition pushes the development of flexible and easy to use mobile tools, with great advantages over the traditional computer-based approaches. The Accept System from SINMETRO allows data gathering for quality control, in the form of Inspection sheets. Such tool allows quality assurance by monitoring some samples of a given material, for instance milk...
Nos tempos em que vivemos, marcados pela expressão “crise” aos mais variados níveis (financeiro, económico, político, social, ético, entre outros), “empreendedorismo” e “inovação” parecem ser palavras de ordem na procura de soluções. E se estes conceitos estão, tradicionalmente, ligados ao sector lucrativo no sentido de iniciativa empresarial e uma constante adaptabilidade de produtos às exigências do mercado, ...
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