Towards the Development of XDense, A Sensor Network for Dense Sensing

Poster in 12th European Conference on Wireless Sensor Networks (EWSN 2015). 9 to 11, Feb, 2015, pp 24-25. Porto, Portugal.

TICAI 2008

TICAI 2008 é o terceiro volume de uma série que recolhe as contribuições mais significativas dos melhores congressos de língua espanhola e Portuguesa no âmbito da Sociedade de Educação do IEEE. Este volume corresponde aos eventos realizados no ano de 2008, é promovido pelos Capítulos Português e Espanhol desta Sociedade. Como os volumes anteriores, o âmbito centra-se na investigação e aplicações da tecnologia na educação e engloba o desenho e investigação de novas ferramentas, materiais e técnicas que facilitem o ensino/ aprendizagem e aplicações, métodos pedagógicos e experiências concretas de uso destas novas técnicas e ferramentas. Tudo com um enfoque particular no ensino/ aprendizagem das disciplinas próprias do IEEE, fundamentalmente nas áreas da Engenharia Electrotécnica, Tecnologia Electrónica, Engenharia de Telecomunicações e Engenharia Informática. Assim, os capítulos deste livro passaram pelo crivo apertado de duas revisões: primeiro do próprio congresso e depois uma segunda selecção de entre os artigos aceites para o congresso. Para esse processo, contamos com membros destacados de cada um dos Comités de Organização ou de programa dos respectivos congressos.

Performance Model for MRC Receivers with Adaptive Modulation and Coding in Rayleigh Fading Correlated Channels with Imperfect CSIT

RTUWO Advances in Wireless and Optical Communications 2015 (RTUWO 2015). 5-6 Nov Riga, Latvia.

Semi-Partitioned Scheduling of Fork-Join Tasks using Work-Stealing

13th IEEE/IFIP International Conference on Embedded and Ubiquitous Computing (EUC 2015). 21 to 23, Oct, 2015, Session W1-A: Multiprocessing and Multicore Architectures. Porto, Portugal.

Automated Synthesis Procedure of RF Discrete Tuning Differential Capacitance Circuits

The paper presents a RFDSCA automated synthesis procedure. This algorithm determines several RFDSCA circuits from the top-level system specifications all with the same maximum performance. The genetic synthesis tool optimizes a fitness function proportional to the RFDSCA quality factor and uses the epsiv-concept and maximin sorting scheme to achieve a set of solutions well distributed along a non-dominated front. To confirm the results of the algorithm, three RFDSCAs were simulated in SpectreRF and one of them was implemented and tested. The design used a 0.25 mum BiCMOS process. All the results (synthesized, simulated and measured) are very close, which indicate that the genetic synthesis method is a very useful tool to design optimum performance RFDSCAs.

Hard real-time multiprocessor scheduling resilient to core failures

Presented at 21st IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA 2015). 19 to 21, Aug, 2015, pp 122-131. Hong Kong, China.

Combining sparse and dense methods in 6D Visual Odometry

13th International Conference on Autonomous Robot Systems (Robotica), 2013, Lisboa

O Analógico como Modelo. Sem Título.11

Trabalho de Projecto apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ciências da Comunicação

Dependable Embedded Wireless Infrastructure

DEWI will provide key solutions for wireless seamless connectivity and interoperability in the everyday physical environment of citizens, thereby significantly contributing to the emerging smart home and smart public space.

Impact of sensor nodes scaling and velocity on handover mechanisms for healthcare wireless sensor networks with mobility support

Health promotion in hospital environments can be improved using the most recent information and communication technologies. The Internet connectivity to small sensor nodes carried by patients allows remote access to their bio-signals. To promote these features the healthcare wireless sensor networks (HWSN) are used. In these networks mobility support is a key issue in order to keep patients under realtime monitoring even when they move around. To keep sensors connected to the network, they should change their access points of attachment when patients move to a new coverage area along an infirmary. This process, called handover, is responsible for continuous network connectivity to the sensors. This paper presents a detailed performance evaluation study considering three handover mechanisms for healthcare scenarios (Hand4MAC, RSSI-based, and Backbone-based). The study was performed by simulation using several scenarios with different number of sensors and different moving velocities of sensor nodes. The results show that Hand4MAC is the best solution to guarantee almost continuous connectivity to sensor nodes with less energy consumption.

Localização segura de objectos autenticados por RFID

Trabalho apresentado no âmbito do Mestrado em Engenharia Informática, como requisito parcial para obtenção do grau de Mestre em Engenharia Informática

Tumor Fibroso Localizado da Pleura: Análise de 11 Novos Casos

Pretende-se neste trabalho fazer uma revisão retrospectiva duma patologia, rara na sua incidência(5% de todos os tumores pleurais) e singular nas suas características, analisando na nossa casuística as formas de apresentação, terapêutica cirúrgica e resultados obtidos. Os tumores solitários da pleura são formações neoplásicas raras, cujo comportamento biológico não é obrigatoriamente correlacionável com características imuno-histoquímicas, pois os considerados benignos apresentam um sensível índice de recidiva e metastização, independentemente do volume que apresentam. A cirurgia é o único tratamento disponível e a excisão cirúrgica completa é decisiva para a cura. De Agosto de 1995 a Janeiro de 2003, na casuística do Serviço de Cirurgia Cardiotorácica do Hospital de Santa Marta, foram analisados todos os doentes com o diagnóstico de tumor fibroso localizado da pleura (TFLP). Neste contexto, identificaram-se 11 doentes com idade média de 57,54 anos, dos quais 6 do sexo feminino, em que foi colocado o diagnóstico de tumor fibroso localizado da pleura; 6 dos tumores foram classificados como malignos e 5 como benignos. Nesta série, todos os doentes foram submetidos a intervenção cirúrgica, com técnicas variadas, sem mortalidade intra-operatória ou morbilidade intra-hospitalar significativas, apesar da dificuldade da cirurgia nos tumores mais volumosos (um dos tumores pesava 2,5 kg). O follow up decorreu entre os 4 e os 84 meses (média – 39,4 meses). Um doente faleceu 13 meses após a intervenção, por embolia pulmonar maciça, depois de várias crises de tromboembolismo pulmonar (sem relação determinável com a cirurgia ou a patologia base), apesar da anticoagulação iniciada e controlada na Consulta do Hospital.

Fexofenadine is Efficacious and Safe in Children (Aged 6-11 Years) with Seasonal Allergic Rhinitis

Background: This is the first prospective, randomized, doubleblind, placebo-controlled study showing statistical improvement of an H1-antihistamine in children with seasonal allergic rhinitis in all symptoms throughout the entire treatment period. Objective: This randomized, placebo-controlled, parallelgroup,double-blind study was performed to assess the efficacy and safety of fexofenadine in children with seasonal allergic rhinitis. Methods: This study was conducted at 148 centers in 15 countries. Nine hundred thirty-five children (aged 6-11 years) were randomized and treated with either fexofenadine HCl 30 mg (n = 464) or placebo (n = 471) tablets twice a day for 14 days. Individual symptoms (sneezing; rhinorrhea; itchy nose, mouth, throat, and/or ears; itchy, watery, and/or red eyes; and nasal congestion) were assessed at baseline and then daily at 7:00 AM and 7:00 PM (±1 hour) during the double-blind treatment period. Each total symptom score was the sum of all symptoms, excluding nasal congestion. The primary efficacy variable was the change from baseline in the average of the daily 12-hour evening reflective total symptom scores throughout the double-blind treatment. Safety was evaluated from adverse-event reporting, vital signs, physical examinations, and clinical laboratory data at screening and study end point.

HTLV-1/2 seroprevalence and coinfection rate in Brazilian first-time blood donors: an 11-year follow-up

The seroprevalence and geographic distribution of HTLV-1/2 among blood donors are extremely important to transfusion services. We evaluated the seroprevalence of HTLV-1/2 infection among first-time blood donor candidates in Ribeirão Preto city and region. From January 2000 to December 2010, 1,038,489 blood donations were obtained and 301,470 were first-time blood donations. All samples were screened with serological tests for HTLV-1/2 using enzyme immunoassay (EIA). In addition, the frequency of coinfection with hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV), Chagas disease (CD) and syphilis was also determined. In-house PCR was used as confirmatory test for HTLV-1/2. A total of 296 (0.1%) first-time donors were serologically reactive for HTLV-1/2. Confirmatory PCR of 63 samples showed that 28 were HTLV-1 positive, 13 HTLV-2 positive, 19 negative and three indeterminate. Regarding HTLV coinfection rates, the most prevalent was with HBV (51.3%) and HCV (35.9%), but coinfection with HIV, CD and syphilis was also detected. The real number of HTLV-infected individual and coinfection rate in the population is underestimated and epidemiological studies like ours are very informative.

Linear amplification with multiple nonlinear devices

Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e Computadores