OSTEORRADIONECROSE DOS MAXILARES: UM ESTUDO DESCRITIVO

A Osteorradionecrose (ORN) é a complicação oral mais grave e severa advinda do tratamento radioterápico de tumores da região de cabeça e pescoço. A doença é definida como uma área de tecido ósseo exposto desvitalizado onde não ocorreu o processo de reparo no mínimo entre três a seis meses no momento do diagnóstico, na ausência de doença neoplásica local. A ORN pode ocorrer de forma espontânea ou devido à doença periodontal, doença apical, e, mais frequentemente após trauma induzido por próteses, cirurgias ou extrações dentárias (Lye et. al., 2007; Nabil, Samman, 2011).Dependendo da extensão e localização da lesão, os sintomas da ORN pode incluir dor, odor fétido, disgeusia, disestesia ou anestesia, trismo, dificuldade de mastigação, deglutição e da fala, formação de fístula, fratura patológica e infecção local ou sistêmica (Epstein et. al, 1987). A incidência desta complicação é baixa, variando, na maioria dos estudos, entre 5-10% (Jham et al., 2008; Tsai et al., 2012; Niewald et al., 2014), sendo que esta vem diminuindo ao longo do tempo, especialmente pelo crescente cuidado com a prevenção desta patologia. Deste modo, o objetivo deste trabalho é descrever o perfil de indivíduos diagnosticados com ORN dos maxilares, no Centro de Referência de Lesões Bucais da Universidade Estadual de Feira de Santana, Bahia (CRLB- UEFS), no período de 2010 a 2016

PREVALÊNCIA E POSSÍVEIS FATORES ASSOCIADOS AOS TUMORES DE GLÂNDULAS SALIVARES: UM ESTUDO DESCRITIVO NO MUNICÍPIO DE FEIRA DE SANTANA.

A incidência anual dos tumores de glândulas salivares no mundo está em torno de 1 a6,5 casos por 100.000 habitantes (TORABINA, KHALESI, 2014; NEVILLE, 2017)

An IC architecture for RF Energy Harvesting systems

In this work we present an IC architecture for RF energy harvesting. The system has been designed with a 0.18μm CMOS SMIC technology and optimized at 900MHz. Simulation results have confirmed that the integrated system handles an incoming power typically ranging from -25 dBm to 20 dBm by rectifying the variable input signals into a DC voltage source with an overall efficiency up to 50%. The chip area estimation for the proposed system is as low as 3x3mm2

Electronic Interface for Lidar System and Smart Cities Applications

This work deals with the design of a new readoutelectronics for silicon photomultipliers sensors. The so-calledSiPMs sensors are an emerging technology currentlydiffusing in many applications and, among them, in thedefinition of a new generation of LIDAR systems. Thelatter, nowadays have a primary role in the evolutionprocess that is involving Smart Cities, being an enablingtechnology in different fields. The solution here proposed isrealized at electronic level with a 150 nm technology processfrom LFoundry and results provide a feasibledemonstration of the capability of the proposed designapproach to be employed in practical application

Biomass furnace for externally fired gas turbine: Development and validation of the numerical model

Externally-fired gas turbines (EFGT) are currently being investigated for co-generation from biomass, because of their ability to deal with low-grade fuels without the complexity of gasification. Main drawbacks of the technology are related to the high thermal stresses experienced by the heat exchanger. The present work proposes a computational fluid dynamics (CFD) analysis of a grate-fired furnace installed in a EFGT cycle, with the purpose to provide a tool for detecting the most critical regions in the furnace. The model is complemented with a process simulation of the entire EFGT cycle. Different approaches for treating the fuel bed and their impact on the CFD analysis are discussed and validated through the availability of in-flame measurements of temperature and chemical species. Predictions indicate the need for a detailed fluid dynamic characterization of the grate region, which was found to largely impact the furnace flow and thermo-chemical fields

On risk-based maintenance: A comprehensive review of three approaches to track the impact of consequence modelling for predicting maintenance actions

Since gas plants are progressively increasing near urban areas, a comprehensive tool to plan maintenance and reduce the risk arising from their operations is required. To this end, a comparison of three Risk-Based Maintenance methodologies able to point out maintenance priorities for the most critical components, is presented in this paper. Moreover, while the literature is mostly focused on probabilistic analysis, a particular attention is directed towards consequence analysis throughout this study. The first developed technique is characterized by a Hierarchical Bayesian Network to perform the occurrence analysis and a Failure Modes, Effects and Criticality Analysis to assess the magnitude of the adverse outcomes. The second approach is a Quantitative Risk Analysis carried out via a software named Safeti. Finally, another software called Synergi Plant is adopted for the third methodology, which provides a Risk-Based Inspection plan, through a semiquantitative risk analysis. The proposed study can assist asset manager in adopting the most appropriate methodology to their context, while highlighting priority components. To demonstrate the applicability of the approaches and compare their rankings, a Natural Gas Regulating and Measuring Station is considered as case study. The results showed that the most suited method strongly depends on the available data

A Combined 90/900 MHz IC Architecture for Smart Tag Application

In this work we present a combined 90/900 MHz Energy Harvesting Architecture for active smart tag Application. The harvester takes advantages from a dedicated diplexer and a power manager for battery life enhancement purposes. The system has been optimized in the 900 MHz frequency range by analyzing a probabilistic approach used for modeling the possible amount of Global System for Mobile communication (GSM) energy that could be harvested while a fixed power downlink scenario has been adopted for the 90MHz band. A preliminary IC system with a 0.18μm CMOS SMIC technology has been designed and optimized at 90 and 900 MHz while discrete element board, to be integrated with the proposed IC, with commercial components has been developed and tested. Concerning simulation results on the IC design they have confirmed that the integrated system handles an incoming power typically ranging from -25 dBm to 5 dBm by rectifying the variable input signals into a DC voltage source with an average 50% efficiency

RF Active Inductors Small-Signal Design by Means of Conformal Transformations

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Detection of <i>Mycobacterium avium</i> subsp. <i>paratuberculosis</i> (MAP) in animals and human tissue

The aim of this work was the detection of MAP in human with CD and in ovine with natural and experimental PTBC, by in “situ” techniques. ISH showed strong signals in the macrophages infiltrating the mucosal and submucosal layers in PTBC samples and positive signals in macrophages of CD cases. Furthermore, ISPCR signals were more numerous than those obtained by ISH. This result indicate that ISPCR is able to detect also less copies of MAP DNA