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O Papel da RDIS na Sociedade da Informação
Joaquim Jorge F. Nunes; Fernando M. S. RamosThe result of the continuous evolution in Telecommunications is the growing easiness to access information, and the emergence of the so called Information Society. The final consequence of such situation, is the development of nations and the well-being of their citizens. This paper focuses the ISDN, and the steps that have been taken in order to transform it in the basic and funda...
SPARK: Missão Micro-Rato ‘99
Anabela A. Duarte; Paulo Jorge F. Peixoto; Este artigo descreve o robot SPARK baseado numa plataforma móvel circular com duas rodas motrizes e uma roda livre. Tem 3 sensores de obstáculos na parte frontal e um sensor de detecção da zona de chegada na parte inferior. É equipado com encoders ópticos incrementais nas rodas motrizes e uma unidade rotativa na parte superior para a detecção da posi&c...
Assessment of 3D scanners for modeling Pectus Carinatum corrective bar
Moreira, António H. J.; Fonseca, João Gomes; Rodrigues, Pedro L.; Fonseca, Jaime C.; Pinho, A.C.M.; Correia-Pinto, Jorge; F. Rodrigues, NunoPectus Carinatum (PC) is a chest deformity consisting on the anterior protrusion of the sternum and adjacent costal cartilages. Non-operative corrections, such as the orthotic compression brace, require previous information of the patient chest surface, to improve the overall brace fit. This paper focuses on the validation of the Kinect scanner for the modelling of an orthotic compression brace for the correcti...
Ehanced oil recovery under simulated reservoir conditions using an indigenous B...
Gudiña, Eduardo J.; Pereira, Jorge F. B.; Costa, A. R.; Rodrigues, L. R.; Coutinho, J. A. P.; Teixeira, J. A.Microbial Enhanced Oil Recovery (MEOR) is potentially useful to increment oil recovery from reservoirs beyond primary and secondary recovery operations using microorganisms and their metabolites. In situ stimulation of microorganisms that produce biosurfactants and degrade heavy oil fractions reduces the capillary forces that retain the oil inside the reservoir and decreases oil viscosity, thus promoting its fl...
Production and characterization of biosurfactants produced by microorganisms is...
Pereira, Jorge F. B.; Costa, A. R.; Gudiña, Eduardo J.; Rodrigues, L. R.; Teixeira, J. A.; Coutinho, J. A. P.Surfactants are amphiphilic molecules that comprise both hydrophilic and hydrophobic moieties, allowing the reduction the surface and interfacial tensions, as well as the formation of oil in water or water in oil emulsions. These surface-active compounds are extensively used by petroleum industries in order to reduce the capillary forces that entrapped the oil inside the reservoir. The compounds synthetized che...
Thoracic wall reconstruction using ultrasound images to model/bend the thoracic...
Fonseca, João Gomes; Moreira, António H. J.; Rodrigues, Pedro L.; Fonseca, Jaime; Pinho, A.C.M; Correia-Pinto, Jorge; F. Rodrigues, NunoPectus excavatum is the most common congenital deformity of the anterior thoracic wall. The surgical correction of such deformity, using Nuss procedure, consists in the placement of a personalized convex prosthesis into sub-sternal position to correct the deformity. The aim of this work is the CT-scan substitution by ultrasound imaging for the pre-operative diagnosis and pre-modeling of the prosthesis, in order...
Developing and validating a measure of the strength of the HRM system: Operatio...
Coelho, Joaquim P.; Cunha, Rita C.; Gomes, Jorge F.S.; Correia, AnabelaThe four studies in this article introduce a questionnaire to measure Strength of the HRM System (HRMSQ), a multidimensional construct, theoretically developed by Bowen and Ostroff (2004). Strength of the HRM System is a set of process characteristics that lead to effectiveness in conveying signals to employees that allow them to create a shared meaning of desired and appropriate work behaviours. Nine character...
Isolation and study of microorganisms from oil samples for application in Micro...
Gudiña, Eduardo J.; Pereira, Jorge F. Brandão; Rodrigues, L. R.; Coutinho, João A. P.; Teixeira, J. A."Author's personal copy" ; Microbial Enhanced Oil Recovery (MEOR) is potentially useful to increment oil recovery from a reservoir beyond primary and secondary recovery operations using microorganisms and their metabolites. Stimulation of bacterial growth for biosurfactant production and degradation of heavy oil fractions by indigenous microorganisms can enhance the fluidity and reduce the capillary forces tha...
A stable liquid–liquid extraction system for clavulanic acid using polymer-base...
Pereira, Jorge F. B.; Santos, Valéria Carvalho; Johansson, Hans-Olof; Teixeira, J. A.; Pessoa Junior, AdalbertoThe partitioning of Clavulanic Acid (CA) in a novel inexpensive and stable aqueous two-phase system (ATPS) composed by poly(ethylene glycol) (PEG) and sodium polyacrylate (NaPA) has been studied. The aqueous two-phase systems are formed by mixing both polymers with a salt (NaCl or Na2SO4) and an aqueous solution of CA. The stability of CA on the presence of both polymers was investigated and it was observed tha...
Characterization by electrospray ionization and tandem mass spectrometry of rha...
Pereira, Jorge F. B.; Gudiña, Eduardo J.; Dória, M. L.; Domingues, M. R. M.; Rodrigues, L. R.; Teixeira, J. A.; Coutinho, J. A. P.In this work, biosurfactants produced by two Pseudomonas aeruginosa strains isolated from Brazilian crude oils were identified by proton nuclear magnetic resonance ((1)H NMR) and further characterized by mass spectrometry (MS) coupled with electrospray ionization (ESI) and tandem mass spectrometry (MS/MS) analysis in positive mode and their surface activities evaluated. Mono-rhamnolipids and di-rhamnolipids wer...
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