18 documents found, page 1 of 2
Extending MQTT-SN with Real-Time Communication Services
Fontes, Fernando; Rocha, Bruno; Mota, Alexandre; Pedreiras, Paulo; Silva, ValterThe Message Queuing Telemetry Transport (MQTT) protocol is one of the most popular application-layer protocols for machine-to-machine communications. Its popularity results from its simplicity and effective publisher/subscriber messaging model, which allows lightweight implementations able to run on resource constrained devices, thus making this protocol suitable for (Industrial) Internet of Things applications...
Instrumentation and visualization of a small-scale downdraft gasifier
Rosa, Miguel; Silva, Valter; Mota, Alexandre; Mendonça, MiguelBiomass gasification is a promising technology in the conversion of biomass into electricity, being considered the most efficient thermochemical process for such endeavor. However, some technical aspects remain unsolved and currently slow down its progress, such as the formation of tars in the gas stream. Accurate measurements of a gasifier's operational parameters are central to improve the process' performanc...
Atypical presentation of colon cancer: perforation with hepatic fistulization
Rodrigues, Joana Ruivo; Rodrigues, Bernadete; Ribeiro, Nuno; Ribeiro, Carla Filipa; Figueiredo, Ângela; Mota, Alexandre; Cardoso, Daniel; Azevedo, PedroOne of the known and rare complications of the colon cancer is perforation, with fistulas or abscesses formation. In this paper it is reported the case of a 61 year old man who presented himself with pain and a palpable mass in the right upper abdominal quadrant in association with fever and weight loss. The radiological investigation showed findings compatible with perforated colon cancer and hepatic fistuliza...
Morgagni Hernia Associated with Hiatus Hernia, a Rare Case
Rodrigues, Joana ruivo; Rodrigues, Bernadete; Ribeiro, Nuno; Ribeiro, Carla Filipe; Figueiredo, Ângela; Mota, Alexandre; Cardoso, DanielThe simultaneous occurrence of two separate non-traumatic diaphragmatic hernias is extremely rare. We report a case of an old man with two diaphragmatic hernias (Morgagni and Hiatal hernias) and we also review the clinical and imagiologic features (Radiographic and Computed Tomography) of Morgagni and hiatal herniation.
Neoplasia Gástrica: Peculiaridades do Adenocarcinoma Mucinoso
Oliveira, Ana Pinho; Mota, Alexandre; Figueiredo, Ângela; Lopes, Joanne; Martins, Cláudia; Santos, Carla FerreiraGastric mucinous adenocarcinoma, a rare histological subtype of gastric cancer, is characterized by the presence of calcifications which, together with other peculiarities, allows its suspicion by currently available imaging techniques. The authors describe the case of a patient with this subtype of gastric neoplasia and revise its imaging and pathophysiological characteristics.
Hipertensão renovascular num rapaz 12 meses: o que pode o radiologista fazer?
Mota, Alexandre; Donato, Paulo; Noruegas, Maria José; Carvalheiro, Vítor; Moreira, ÂngelaApresentamos um caso clínico de doença renovascular, provavelmente relacionada com displasia fibromuscular, num lactente do sexo masculino de 12 meses de idade com hipertensão arterial grave associada a lesões de orgãos-alvo, destacando a abordagem radiológica. A avaliação inicial incluiu ecografia renal, que mostrou rins de tamanho normal, com ecogenicidade cortical normal à direita e aumento focal da ecogenic...
Renovascular hypertension in a 12 month old boy: what can the radiologist do?
Mota, Alexandre; Donato, Paulo; Noruegas, Maria José; Carvalheiro, Vítor; Moreira, ÂngelaWe report a clinical case of renovascular disease, probably linked to fibromuscular dysplasia, in a 12 months old boy with severe arterial hypertension with target-organ damage, highlighting the radiological approach. Initial investigation included renal ultrasound that showed normal sized kidneys, with normal cortical echogenicity on the right and focally increased echogenicity of the posterior aspect of the l...
Quantifying the effects of aspectual decompositions on design by contract modul...
Rebêlo, Henrique; Lima, Ricardo; Kulesza, Uirá; Ribeiro, Márcio; Yuanfang, Cai; Coelho, Roberta; Sant'Anna, Cláudio Nogueira; Mota, AlexandreTexto completo: acesso restrito. p. 913–941; Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2014-05-08T12:00:48Z No. of bitstreams: 1 0218194013500265.pdf: 1599729 bytes, checksum: b3e54b45560b15d918aed9454ee5a3fc (MD5); Made available in DSpace on 2014-05-08T12:00:48Z (GMT). No. of bitstreams: 1 0218194013500265.pdf: 1599729 bytes, checksum: b3e54b45560b15d918aed9454ee5a3fc (MD5) Previous issue date: 2013...
Subcutaneous Abscess Secondary to Xanthogranulomatous Cholecystitis
Correia, Hugo; Mota, Alexandre; Cardoso, Daniel; Gerediaga, GabrielOne of the known complications of gallstones consists in gallbladder perforation with cholecystocutaneous abscesses or external fistulas formation. Nowadays these types of complications are uncommon, having been more frequent. The authors report the case of an 86 year-old woman, bedridden and dependent, referred to our institution by presenting a tumefaction with inflammatory signs in the right upper quadrant. ...
Placa de desenvolvimento para microcontroladores da família PIC32MX
Antão, Rómulo; Terra, Luís; Mota, Alexandre; Martins, RuiEste artigo apresenta uma placa de desenvolvimento para microcontroladores de 32bit da família PIC32MX da Microchip. São analisados os aspectos mais importantes do seu core MIPS, a organização de memória, os seus periféricos assim como as ferramentas de suporte ao desenvolvimento de aplicações para este sistema. A título de comparação, são realizados três testes em que se avaliam os tempos de execução de três a...