RESUMO
The environment consists of the interaction between the physical, biotic, and anthropic means. As this interaction is dynamic, environmental characteristics tend to change naturally over time, requiring continuous monitoring. In this scenario, the internet of things (IoT), together with traditional sensor networks, allows for the monitoring of various environmental aspects such as air, water, atmospheric, and soil conditions, and sending data to different users and remote applications. This paper proposes a Standard-based Internet of Things Platform and Data Flow Modeling for Smart Environmental Monitoring. The platform consists of an IoT network based on the IEEE 1451 standard which has the network capable application processor (NCAP) node (coordinator) and multiple wireless transducers interface module (WTIM) nodes. A WTIM node consists of one or more transducers, a data transfer interface and a processing unit. Thus, with the developed network, it is possible to collect environmental data at different points within a city landscape, to perform analysis of the communication distance between the WTIM nodes, and monitor the number of bytes transferred according to each network node. In addition, a dynamic model of data flow is proposed where the performance of the NCAP and WTIM nodes are described through state variables, relating directly to the information exchange dynamics between the communicating nodes in the mesh network. The modeling results showed stability in the network. Such stability means that the network has capacity of preserve its flow of information, for a long period of time, without loss frames or packets due to congestion.
Assuntos
Redes de Comunicação de Computadores , Internet das Coisas , Monitoramento Ambiental , Internet , Monitorização Fisiológica , TransdutoresRESUMO
Although cryptococcal infections begin in the lungs, meningoencephalitis is the most frequently encountered manifestation of cryptococcosis among individuals with advanced immunosuppression. As the infection progresses along the Virchow-Robin spaces, these structures may become dilated with mucoid material produced by the capsule of the organism. We report a case of a 24-year-old man with cryptococcal meningoencephalitis in which magnetic resonance imaging showed clusters of gelatinous pseudocysts in the periventricular white matter, basal ganglia, mammillary bodies, midbrain peduncles and nucleus dentatus with a soap bubble appearance.
Assuntos
Criptococose/diagnóstico , Imageamento por Ressonância Magnética , Meningoencefalite/diagnóstico , Artefatos , Humanos , Masculino , Meningoencefalite/microbiologia , Adulto JovemRESUMO
Although cryptococcal infections begin in the lungs, meningoencephalitis is the most frequently encountered manifestation of cryptococcosis among individuals with advanced immunosuppression. As the infection progresses along the Virchow-Robin spaces, these structures may become dilated with mucoid material produced by the capsule of the organism. We report a case of a 24-year-old man with cryptococcal meningoencephalitis in which magnetic resonance imaging showed clusters of gelatinous pseudocysts in the periventricular white matter, basal ganglia, mammillary bodies, midbrain peduncles and nucleus dentatus with a soap bubble appearance.
Assuntos
Humanos , Masculino , Adulto Jovem , Criptococose/diagnóstico , Imageamento por Ressonância Magnética , Meningoencefalite/diagnóstico , Artefatos , Meningoencefalite/microbiologiaRESUMO
No presente trabalho, apresentamos um levantamento das biópsias encaminhadas ao Laboratório de Patologia da Faculdade de Odontologia de Pernambuco, no período de 1994 a 1997. A partir da análise dos laudos de diagnóstico histopatológico e das fichas clínicas de encaminhamento, avaliou-se a freqüência de lesões do complexo buco-maxilo-facial, classificando-as em 9 diferentes grupos, e as características clínicas daquela que obteve o maior índice percentual de ocorrência. Os resultados demonstraram um predomínio das lesões proliferativas não neoplásicas; a hiperplasia fibrosa inflamatória e o granuloma piogênico representaram as entidades mais comuns no levantamento