Slots
Mostrando 1-12 de 70 artigos, teses e dissertações.
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1. Quais agentes são responsáveis pela pericementite medicamentosa?
A pericementite medicamentosa pode ser causada por agentes químicos utilizados durante o tratamento endodôntico como substâncias químicas irrigadoras (o hipoclorito de sódio, por exemplo. Quanto maior for a concentração empregada, maior a possibilidade da ação irritante nos tecidos), medicações intracanais sem compatibilidade biológica e mater
Núcleo de Telessaúde Maranhão HU-UFMA. Publicado em: 12/06/2023
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2. Variations of Compact Rectangular Microstrip Antennas Using Defected Ground Plane Structure
Abstract The defects in the form of slots have been employed in microstrip antenna either on the patch or the ground plane to yield frequency reduction. However, the reported work does not provide any comparative study that highlight upon the frequency and cross-polar level reduction achieved using these various shape slot/defects. This paper provides a thor
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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3. Compact Triple Band Notched Pentagonal Shaped UWB Antenna Loaded with Slots and Parasitic Resonator
Abstract In this paper, a compact, planar printed microstrip line fed pentagonal shape ultra-wideband antenna with triple band-notched characteristics is proposed and investigated. By incorporating a pair of mirrored Γ-shape, a pair of mirrored L-shape slots in the pentagonal patch and bent C-shape parasitic strip at the backside of a patch, the tunable ban
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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4. A High Gain Super Wideband Metamaterial Based Antenna
Abstract The paper proposes a high gain, metamaterial based super wideband (SWB) antenna. The SWB antenna has two inverted U slots which are responsible for two notches at 3.5 GHz and 5.5 GHz frequencies. A flower-shaped slot is etched from the radiator to obtain the SWB characteristics. The super wideband antenna has dimensions of 30×35 ×1.5 mm3 with FR4
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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5. Study of Patch Antennas with Koch Curve Form Slots
Abstract This work proposes the study of patch antennas with fractal slots. Initially, a 2.4 GHz microstrip antenna is designed. Then, the slots in the Koch fractals format are inserted with the iteration 0, 1 and 2. Similarly, it is expected that the antenna can be subjected to various functions in other applications. Simulations using CST STUDIO SUITE Stud
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
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6. A comparative analysis of the frictional resistance of esthetic orthodontic wires
Resumo Introdução O movimento ortodôntico bem sucedido está diretamente relacionado com a capacidade de os fios ortodônticos deslizarem sobre os bráquetes e tubos ortodônticos. Portanto, durante a movimentação ortodôntica a principal preocupação está diretamente ligada a fricção entre o suporte e o fio. Objetivo O objetivo deste estudo foi a
Rev. odontol. UNESP. Publicado em: 22/08/2019
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7. O ENSINO DE FONOAUDIOLOGIA NO BRASIL: RETRATO DOS CURSOS DE GRADUAÇÃO
Resumo O presente estudo foi realizado em setembro de 2018, e teve como objetivo verificar o estado atual do ensino de fonoaudiologia no Brasil, por meio da caracterização de seus cursos de graduação. Para tal, foi realizada uma pesquisa documental e descritiva, de abordagem quantitativa e qualitativa. O levantamento de dados ocorreu no portal do Minist�
Trab. educ. saúde. Publicado em: 04/07/2019
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8. Dumbbell Shaped Microstrip Broadband Antenna
Abstract In this article, a dumbbell shaped microstrip broadband microstrip antenna with partial ground plane is presented, The overall dimension of the proposed antenna is 20 × 15 × 1.5 mm3 and is fabricated on FR4 substrate which has electrical permittivity of 4.3 and loss tangent of 0.025. FR4 is a low cost and easily available. The thickness of the sub
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2019-03
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9. A Novel Design of an H-shaped Microstrip Diplexer
Abstract In this paper, a new microstrip diplexer using modified H-shaped resonators with a compact size and high isolation is presented. This circuit is designed for the ISM band at 2.4 GHz and GPS at 1.575 GHz. The proposed diplexer is formed by connecting two band-pass filters designed by using the modified H-shaped resonator and tapped microstrip Input/o
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
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10. Dual U-Slot Loaded Patch Antenna with a Modified L-Probe Feeding
Abstract In this paper, a modified L-strip fed patch antenna is theoretically analyzed for wideband applications. Dual U-shaped slots are incorporated in the radiating patch and a maximum bandwidth of 16.93% (2.65 GHz to 3.14 GHz) is achieved. Further, when two parasitic elements are used, antenna bandwidth improves up to 25.89% (2.90 GHz to 3.77 GHz). The m
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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11. Compact MIMO Antenna for Multiband Mobile Applications
Abstract This paper presents a multiple input multiple output (MIMO) antenna for multiband operation based on meander lines with L shaped metallic strip. Meander lines is basically a monopole antenna loaded with multiple sections of short circuited transmission line that acts as inductor and alter the impedance characteristics of antenna. Antenna size miniat
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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12. Avaliação empírica dos impactos competitivos de regras regulatórias de redistribuição de slots em aeroportos
Resumo O presente trabalho visa efetuar um estudo empírico dos efeitos do congestionamento da infraestrutura aeroportuária sobre o poder de mercado das companhias aéreas, com ênfase na dominância de slots. A partir de um modelo de escolha do tipo logit aninhado agregado, foi estimada uma modelagem econométrica de poder de mercado relativo das grandes e
J. Transp. Lit.. Publicado em: 2016-12