Browsing by Author "Cordeiro, A."
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- Bidirectional Boost/Buck Quadratic Converter for Distributed Generation Systems with Electrochemical Storage SystemsPublication . Foito, Daniel José Medronho; Cordeiro, A.The increasing number of distributed generation systems using renewable and non-conventional energy sources show the trend of future generation systems. Most of these systems require power electronic converters as an interface between the DC voltage buses and electrochemical storage systems. Such storage systems, like batteries or supercapacitors, usually need bidirectional DC-DC converters to allow their charge or discharge according with necessary operation conditions. In this paper, a non-isolated bidirectional Buck-Boost converter with high voltage gain for electrochemical storage devices used in distributed generation systems is presented. To achieve high voltage gain ratios, the proposed topology presents quadratic characteristics in both step-down (Buck) and step-up (Boost) operation modes. In addition to the wide conversion range, it presents continuous input and output current, reduced charging/discharging ripple and simple control circuitry. All these features allow the energy exchange smoothly and continuously resulting in a longer durability of storage devices. The principle of the operation of the proposed converter in both operation modes, as well as their theoretical analysis will be discussed. The performance of this bidirectional power converter is confirmed through simulation and experimental results.
- Iloprost infusion through elastomeric pump for the out patient treatment of severe Raynaud’s phenomenon and digital ulcers – a single centre experiencePublication . Duarte, A. C.; Barbosa, L.; Santos, M. J.; Cordeiro, A.
- Industrial Automation Self-Learning Through the Develoment of Didactic Industrial ProcessesPublication . Cordeiro, A.; Abraços, M.; Monteiro, L.; Andrade, E.; Foito, Daniel José MedronhoTeaching industrial automation is a complex mission. The classical approach is based on lectures and laboratories assisted by teachers. Nevertheless, teaching industrial automation using the classical approach is not easy because this multidisciplinary area requires knowledge in control, energy, electronics, robotics and computer engineering, among others. In this way, this paper presents an approach to teach Industrial Automation based on a self learning strategy. Instead of using the classical approach, students must develop a research work and a didactic automation prototype. The results of this methodology indicate that students increase the interest about industrial automation and clarify important aspects of assembly, commissioning, parameterization and programming of electric and electronic devices. Additionally this methodology seems to increase self-confidence of students and give them the necessary background to face the challenge of working in the real world.
- Intestinal Amyloidosis in common variable immunodeficiency and Rheumatoid ArthritisPublication . Meira, T.; Sousa, R.; Cordeiro, A.; Ilgenfritz, R.; Borralho, P.We present a case of reactive amyloidosis that developed secondary to common variable immunodeficiency and rheumatoid arthritis. A 66-year-old woman, with prior history of common variable immunodeficiency and rheumatoid arthritis, was referred to our clinic for chronic diarrhea investigation. The patient was submitted to colonoscopy with ileoscopy, which did not show relevant endoscopic alterations. However, undertaken biopsies revealed amyloid deposition. Since amyloidosis with GI involvement is a rare cause of chronic diarrhea, this pathology should be considered in etiologic investigation, especially when associated with chronic inflammatory diseases.
- Intravenous human immunoglobulin for the treatment of severe longitudinal extensive transverse myelitis associated with systemic lupus erythematousPublication . Duarte, A. C.; Sousa, S.; Nunes, T.; Cordeiro, A.; Gonçalves, P.
- Portuguese recommendations for the use of biological therapies in patients with axial spondyloarthritis – 2016 updatePublication . Machado, P. M.; Cerqueira, M.; Ávila-Ribeiro, P.; Aguiar, R.; Bernardo, A.; Sepriano, A.; Águeda, A.; Cordeiro, A.; Raposo, A.; Rodrigues, A. M.; Barcelos, A.; Malcata, A.; Lopes, C.; Vaz, C. C.; Nour, D.; Godinho, F.; Alvarenga, F.; Pimentel-Santos, F.; Canhão, H.; Santos, H.; Cunha, I.; Neves, J. S.; Fonseca, J. E.; Gomes, J. L.; Tavares-Costa, J.; Costa, L.; Cunha-Miranda, L.; Maurício, L.; Cruz, M.; Afonso, M. C.; Santos, M. J.; Bernardes, M.; Valente, P.; Figueira, R.; Pimenta, S.; Ramiro, S.; Pedrosa, T.; Costa, T. A.; Vieira-Sousa, E.; Portuguese Society of Rheumatology
- Portuguese Recommendations for the use of biological therapies in patients with rheumatoid arthritis- 2016 updatePublication . Duarte, C.; Sousa-Neves, J.; Águeda, A.; Ribeiro, P.; Daniel, A.; Eugénio, G.; Serra, S.; Araújo, F.; Barcelos, A.; Filipe, B.; Bernardes, M.; Canhão, H.; Cerqueira, M.; Capela, S.; Cordeiro, A.; Costa, F.; Costa, L.; Cruz, M.; Cunha-Miranda, L.; Duarte, C.; Falcão, S.; Faria, D.; Figueira, R.; Freitas, J. P.; Gonçalves, M. J.; Madruga Dias, J.; Melo Gomes, J.; Mourão, A. F.; Neto, A.; Oliveira Ramos, F.; Pimenta, S.; Pinto, P.; Polido-Pereira, J.; Ponte, C.; Ramos, J.; Rodrigues, A.; Santos, H.; Santos, M. J.; Sepriano, A.; Silva, C.; Tavares Costa, J.; Teixeira, F.; Teixeira, V.; Valente, P.; Vieira-Sousa, E.; Barros, R.; Abreu, P.; Fonseca, J. E.
- Portuguese recommendations for the use of methotrexate in rheumatic diseases – 2016 updatePublication . Duarte, A. C.; Santos-Faria, D.; Gonçalves, M. J.; Sepriano, A.; Mourão, A. F.; Duarte, C.; Neves, J. S.; Águeda, A. F.; Ribeiro, P. A.; Daniel, A.; Neto, A.; Cordeiro, A.; Rodrigues, A.; Barcelos, A.; Silva, C.; Ponte, C.; Vieira-Sousa, E.; Teixeira, F.; Oliveira-Ramos, F.; Araújo, F.; Barcelos, F.; Canhão, H.; Santos, H.; Ramos, J.; Polido-Pereira, J.; Tavares-Costa, J.; Melo Gomes, J. A.; Cunha-Miranda, L.; Costa, L.; Cerqueira, M.; Cruz, M.; Santos, M. J.; Bernardes, M.; Oliveira, P.; Abreu, P.; Figueira, R.; Barros, R.; Falcão, S.; Pinto, P.; Pimenta, S.; Capela, S.; Teixeira, V.; Fonseca, J. E.; Portuguese Society of Rheumatology
- Safety of etanercept in the treatment of rheumatic disease patients with Hepatitis C virus infectionPublication . Teixeira, L.; Fonseca, C.; Sousa, S.; Vinagre, F.; Cordeiro, A.; Gonçalves, P.; Santos, M. J.; Silva, J. Canas da
- The Portuguese Society of Rheumatology position paper on the use of biosimilars – 2017 updatePublication . Araújo, F. C.; Sepriano, A.; Teixeira, F.; Jesus, D.; Rocha, T. M.; Martins, P.; Tenazinha, C.; Cordeiro, A.; Mourão, A. F.; Silva, C.; Vaz, C.; Duarte, C.; Ponte, C.; Santos, F. P. dos; Canhão, H.; Santos, H.; Pimentão, J. B.; Silva, J. C. da; Polido-Pereira, J.; Silva, J. A. P. da; Miranda, L. C.; Oliveira, M.; Saavedra, M. J.; Gonçalves, P.; Falcão, S.; Capela, S.; Fonseca, J. E.