Frequency
Mostrando 13-24 de 19515 artigos, teses e dissertações.
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13. Evaluation of the Electrically-Evoked Stapedial Reflex Threshold in Pediatric Cochlear Implant Users with High-Frequency Probe Tones
Abstract Introduction Measurement of the electrically-evoked stapedial reflex threshold (ESRT) is an objective tool used to set the comfort levels in pediatric cochlear implant (PCI) users. The levels of ESRT have a strong correlation with comfort levels. However, the clinical utility of ESRT is limited because the ESRT response is not observed in all cochl
International Archives of Otorhinolaryngology. Publicado em: 2022
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14. Broadband Antennas Based on the Double Moebius Strip
Abstract The family of new antenna designs based on the double Moebius strip principle is proposed in this article. Three possible options of the power supply port location had been reviewed in this respect: the cut external strip with the signal port located directly in the cut area is used; the continuous rings without discontinuities are applied, with the
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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15. Frequency Reconfigurable Near-Zero Refractive Index Material for Antenna Gain Enhancement Applications
Abstract In this paper, a planar near-zero refractive index material (NZRIM) consisting of an outer loop with four symmetrical quarter-rings is proposed. The quarter-rings are connected to the outer loop by two symmetrical microstrip lines on the opposite side. The backside of the substrate has mutually central split microstrip lines. By loading adjustable c
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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16. Frequency of Congenital Aortic Arch Anomaly in COVID-19 Patients
SUMMARY OBJECTIVE: The aim of this study was to investigate the frequency of aortic arch anomaly in COVID-19 patients and to determine whether it will be included in the risk classification. METHODS: The study was retrospectively conducted in a third-level hospital by scanning the contrast-enhanced thoracic computed tomography and thoracic computed tomogra
Revista da Associação Médica Brasileira. Publicado em: 2022
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17. Frequency of antigen Dia on the blood donor population of the Hemocenter coordinator of the Hemopa Foundation
ABSTRACT Introduction: Erythrocyte phenotyping is a very important test in the adoption of prophylactic measures to reduce transfusion reactions/alloimmunizations in polytransfused patients. The blood group Diego, in its current, form has 22 antigens, of which 4 are immunogenic, being Dia/Dib and Wra/Wrb, while the others are less expressive. The antigen Di
Hematology, Transfusion and Cell Therapy. Publicado em: 2022
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18. Investigate the Effect of Dielectric Properties on Microwave Absorption of Pyramidal Microwave Absorber
Abstract This paper presents an analysis of the impact of various dielectric properties material’s effects on broadband pyramidal microwave absorbers (PMA). The Computer Simulation Technology (CST) studio software simulates and analyzes the PMA over 0.7 GHz to 30 GHz frequency range. To achieve the best reflectivity performance of the PMA, different types
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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19. Inferior Turbinate Reduction during Rhinoplasty: Is There Any Effect on Rhinitis Symptoms?
Abstract Introduction Inferior turbinate surgery is often performed concomitantly with rhinoseptoplasty. As inferior turbinates play a major role in allergic rhinitis, it seems reasonable to suggest that inferior turbinate surgery reduces allergy. Objective To assess the impact of nasal turbinate surgery on non-obstructive allergic symptoms (nasal discharg
International Archives of Otorhinolaryngology. Publicado em: 2022
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20. Frequency of complications after dermatological surgeries in the elderly
Anais Brasileiros de Dermatologia. Publicado em: 2022
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21. Relationship between the Prenatal Diagnosis of Placenta Acreta Spectrum and Lower Use of Blood Components
Abstract Objective To describe the clinical results of patients admitted and managed as cases of placenta accreta spectrum (PAS) at a Central American public hospital and the influence of the prenatal diagnosis on the condition. Materials and Methods A retrospective analysis of PAS patients treated at Hospital Bertha Calderón Roque, in Managua, Nicaragua,
Revista Brasileira de Ginecologia e Obstetrícia. Publicado em: 2022
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22. A Wideband and Wide Axial Ratio Bandwidth Circularly Polarized Antenna Loaded with Circular Ring Slot
Abstract The presented model for wideband circularly polarized microstrip antenna is an improved version of the previous models which is widely applicable to satellite, microwave relay and radar. The designed circularly polarized antenna having overall volume of 20× 20 × 1.6 mm3 actively works at the impedance bandwidth of 9000 MHz (4.0–12.9 GHz) having
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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23. Experimental Loss Segregation in a Solid Rotor Induction Motor
Abstract Solid rotor induction motors (SRIMs) are asynchronous motors suited for high speed applications. This work presents an experimental case study where standard loss segregation procedures for induction motors are performed with a two-phase smooth solid rotor induction motor in order to verify their applicability. Even though the machine is supposed to
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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24. Mutagenic damage among bronchiectasis patients attending in the pulmonology sector of a hospital in southern Brazil
SUMMARY OBJECTIVE: Bronchiectasis is a chronic respiratory disease characterized by inflammation, irreversible dilation of the bronchi, and recurrent pulmonary infections, with a high morbidity and mortality rate, but is less studied from the point of view of its prevalence and associated factors not directly related to respiratory prognosis. As it is a dis
Revista da Associação Médica Brasileira. Publicado em: 2022