Channel In Step
Mostrando 1-12 de 244 artigos, teses e dissertações.
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1. Pediatric population with cystic fibrosis in the centre of Portugal: candidates for new therapies
Abstract Objectives: Cystic fibrosis (CF) is a severe autosomal recessive disease that results from mutations in a gene encoding the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) protein, a chloride channel. This study aims to characterize the clinical and genetic features of a cohort of pediatric people with CF (PwCF) in the center of Portugal
Jornal de Pediatria. Publicado em: 2022
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2. Multi-Step-Ahead Spectrum Prediction for Cognitive Radio in Fading Scenarios
Abstract This paper analyzes multi-step-ahead spectrum prediction for Cognitive Radio (CR) systems using several future states. A slot-based scenario is used, and prediction is based on the Support Vector Machine (SVM) algorithm. The aim is to determine whether multi-step-ahead spectrum prediction has gains in terms of reduced channel-switching and increased
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-12
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3. Simulation of the solidification in a channel of a water-cooled glass flow
A computer simulation study of a laminar steady-state glass flow that exits from a channel cooled with water is reported. The simulations are carried out in a two-dimensional, Cartesian channel with a backward-facing step for three different angles of the step and different glass outflow velocities. We studied the interaction of the fluid dynamics, phase cha
Braz. J. Chem. Eng.. Publicado em: 2014-12
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4. Automatic segmentation and classification of blood components in microscopic images using a fuzzy approach
INTRODUCTION: Automatic detection of blood components is an important topic in the field of hematology. Segmentation is an important step because it allows components to be grouped into common areas and processed separately. This paper proposes a method for the automatic segmentation and classification of blood components in microscopic images using a genera
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-12
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5. ECAE processed NiTi shape memory alloy
The current work evaluated the microstructures and martensitic transformation temperatures of NiTi shape memory alloy (SMA) deformed by equal channel angular extrusion (ECAE). The Ti-55.27wt.%Ni alloy was processed by 1 ECAE pass at 250 °C using a die with an intersection angle of 120°. After processing, samples were annealed at 300 °C, 400 °C and 500 °
Mat. Res.. Publicado em: 25/03/2014
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6. Design and off-design analysis of a centrifugal compressor for natural gas
Centrifugal is the main compressor type used in process industries and pipelines. This work presents the design of a centrifugal compressor in three steps. The first step is the preliminary design that has an unidimensional treatment and is heavily based on empirical data. Then, using the quasi-ortogonals method, the flow in the meridional plane of the impel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2012
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7. Three-dimensional numerical modeling of RTM and LRTM processes
Resin Transfer Molding (RTM) is a manufacturing process in which a liquid resin is injected into a closed mold pre-loaded with a porous fibrous preform, producing complex composite parts with good surface finishing. Resin flow is a critical step in the process. In this work, the numerical study of the resin flow in RTM applications was performed employing a
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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8. The effects of severe plastic deformation on some properties relevant to Ti implants
In some types of surgical implants, such as bone screws and plates, Grade 2 Ti is seriously considered as a replacement for the Ti-6Al-4V alloy. Advantages are lower cost and the absence of Al and V, which have been identified as potentially harmful to human health. The present paper shows that the lower strength of the commercially pure metal can be enhance
Materials Research. Publicado em: 22/12/2011
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9. Numerical modeling of fluid dynamics and heat transfer of glass flow in a short channel
A numerical investigation of laminar flow in a two-dimensional, Cartesian flow that exits from a short channel with a backward-facing step is carried out in this work for the Reynolds number range of 0.00054 < Re < 54. We studied the steady state fluid dynamics, phase change and heat transfer of the flow. We analyzed the flow behavior occurring for different
Brazilian Journal of Chemical Engineering. Publicado em: 2010-12
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10. Influência de níveis de base nas características morfossedimentares das bacias dos rios das Velhas e Jequitaí (MG)
The Velhas and Jequitaí river basins have together an asymmetric shape that drain northward from Quadrilátero Ferrífero to the northern Minas Gerais State. These two basins are affluent of São Francisco river in its right margin. The headwaters of Velhas and Jequitaí rivers are dominated by quartzites ridges structured during the Brazilian orogenic cycl
Publicado em: 2010
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11. Análise dos parâmetros analógicos do dispositivo SOI DTMOS. / Analog performance of dynamic threshold voltage SOI MOSFET.
This work presents the study of analog performance parameters of PDSOI (Partially-depleted) transistor in comparison with a Dynamic Threshold MOS transistor (DTMOS). The DTMOS is a partially-depleted device with dynamic threshold voltage. This variation of threshold voltage is obtained when the gate is connected to the silicon film (channel) of the PDSOI dev
Publicado em: 2009
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12. Um estudo numérico sobre a transferência de calor na camada limite turbulenta
The present work is a numerical study on the applicaion of analogies between heat and momentum difusion as a methodology to impose heat flux boundary conditions in turbulent boundary layer flows. In order to validate the proposed methodology the following cases were tested: a) a study of turbulent flows over slightly heated flat plates and with unheated star
Publicado em: 2009