Internal Loop
Mostrando 1-12 de 299 artigos, teses e dissertações.
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1. A New Miniaturized Low-Profile and Stable Dual-Band FSS with 2.5D Structure for ISM Bands
Abstract Based on 2.5-Dimensional (2.5D) frequency selective surface (FSS) structures, a new miniaturized frequency selective surface structure is proposed in this work to operate as a bandreject filter in the 2.4 GHz (2400 to 2483.5 MHz) and 5 GHz (5150 to 5350 MHz and 5470 to 5725 MHz) ISM (Industrial, Scientific, and Medical) bands. The FSS has the metall
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Endoscope-assisted retrosigmoid approach in hemifacial spasm: our experience
Resumo Introdução: O uso de descompressão cirúrgica do espasmo hemifacial devido ao loop no canal auditivo interno nem sempre é aceito devido ao risco relacionado ao procedimento cirúrgico. Atualmente, uma nova técnica cirúrgica permite trabalhar em condições seguras. Objetivo: Relatar os resultados que obtivemos com a abordagem retrosigmóidea a
Braz. j. otorhinolaryngol.. Publicado em: 29/08/2019
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3. INTERNAL HERNIA FOLLOWING LAPAROSCOPIC ROUX-EN-Y GASTRIC BY-PASS: INDICATIVE FACTORS FOR EARLY REPAIR
RESUMO CONTEXTO: Hérnia interna (HI) após bypass gástrico em Y de Roux laparoscópico (BGYRL) é uma complicação importante que desafia o cirurgião devido à sua apresentação inespecífica e necessidade de reparo precoce. Um diagnóstico e intervenção cirúrgica tardios para HI pode levar a um aumento na morbidade dos pacientes e trazer grandes p
Arq. Gastroenterol.. Publicado em: 26/08/2019
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4. Comparison of LAMP and PCR for molecular mass screening of sand flies for Leishmania martiniquensis infection
BACKGROUND Leishmaniasis caused by Leishmania martiniquensis infection has been reported in human and domestic animals of Martinique Island, Germany, Switzerland, USA, Myanmar and Thailand. The peculiar clinical features of disseminated cutaneous and visceral forms co-existence render the urgent need of specific diagnostic tool to identify the natural sand
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-02
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5. Evaluation of pH, ultimate tensile strength, and micro-shear bond strength of two self-adhesive resin cements
The aim of this study was to evaluate the pH, ultimate tensile strength (UTS), and micro-shear bond strength (µSBS) of two self-adhesive resin cements to enamel and dentin. Sound bovine incisors (n = 10) and two self-adhesive resin cements (i.e., RelyX U-100 and seT PP) were used. The pH of the resin cements was measured using a pH-indicator paper (n = 3).
Braz. oral res.. Publicado em: 14/10/2014
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6. Verificação do desempenho da técnica "Hardware-in-the-Loop" aplicada a sistemas mecânicos não-lineares / Verification of the hardware-in-the-loop technique applied to non-linear mechanical systems
Este trabalho tem como objetivo a aplicação da técnica conhecida como Hardware-in-the-Loop (HIL), para a avaliação do comportamento dinâmico de dois sistemas mecânicos não-lineares e assim verificar o desempenho da técnica nestes casos. O primeiro estudo consiste na avaliação de um componente, no caso uma engrenagem bi-partida, sujeito a contatos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
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7. Investigation of hydrodynamics and transition regime in an internal loop airlift reactor using CFD
CFD modeling for an internal loop airlift reactor is developed for different superficial gas velocities, ranging from 0.015 to 0.073 m/s. Based on the presence of gas bubbles in the downcomer, three regimes can be generally classified as: no gas bubbles (I), stagnation of gas bubbles (II), and recirculation of gas bubbles into the riser (III). The aim of the
Braz. J. Chem. Eng.. Publicado em: 2012-12
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8. Estratégia de controle robusto para filtro ativo paralelo sem detecção de harmônicos de correntes
Resumo: As estratégias de controle convencionais de filtros ativos de potência paralelos (FAPP) empregam esquemas de detecção de harmônicos em tempo real, usualmente implementados com filtros digitais. Isso aumenta o número de sensores na estrutura do filtro, o que resulta em altos custos. Além disso, esses esquemas de detecção introduzem atrasos qu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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9. Controle preditivo de horizonte infinito para sistemas integradores e com tempo morto. / Model predictive control of integrating systems with dead time.
Model Predictive Control (MPC) has gained wide acceptance in chemical industry in the last 30 years. The basic principle of this technique is to use a model to calculate plants future behavior based on the inputs it would receive in the next sampling periods. It must be set an objective, mainly composed of some measure of the distance between plants predicte
Publicado em: 2011
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10. Project, development and testing In vitro of new model pump for cardiopulmonary bypass : spiral pump / Projeto, desenvolvimento e ensaios "In Vitro" de novo modelo de bomba de sangue para circulação extracorpórea : bomba espiral
A model of blood pump has been developed, the Spiral Pump. This pump has an internal rotor, a conically shaped fuse, containing threads with double entrance on its surface. This rotor is supported by two bearings assembled at a stainless steel shaft, fixed to the housing´s base. The rotation of the conical fuse is generated by magnetic coupling to a motor,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2010
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11. Síntesis y caracterización de adhesivos reposicionables de poliuretano dispersos en agua, obtenidos a partir de aceite de castor maleinizado
This work focused on the production of aqueous dispersions of polyurethane using the emulsification method by phase inversion. For the synthesis two polyols were employed, viz. a commercial polyester and Maleinizated Castor Oil (MACO), with two diisocyanates: one aromatic, toluene diisocyanate (TDI) and another aliphatic, hexamethylene diisocyanate (HDI), wh
Polímeros. Publicado em: 11/06/2010
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12. Subspace predictive control. / Controle preditivo com enfoque em subespaços.
Model Predictive Control (MPC) technology is widely used in chemical process industries. Subspace identification (SID) on the other hand has proven to be an efficient alternative for classical system identification methods. Based on the results from MPC and SID, it was developed in the late 90s a new control approach, called Subspace Predictive Control (SPC)
Publicado em: 2009