Results 11 to 20 of about 6,424,880 (277)

Q-Factor Bounds for Microstrip Patch Antennas [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2023
Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth.
Ben A. P. Nel   +2 more
core   +4 more sources

A Q Methodological Study of the Support Valued by Students with English as an Additional Language [PDF]

open access: yes, 2013
This study investigated the viewpoints of students with English as an Additional Language (EAL). Specifically, I used Q methodology to highlight some of the viewpoints of learners with EAL on the strategies used by adults to support them in school.
Stollery, RL
core   +6 more sources

Difference limen for the Q-factor of room modes [PDF]

open access: yes, 2003
A subjective test study was carried out in order to identify the perceptibility of changes in the Q-factor of room modes. The experimental technique concentrates on the identification of difference limen for three levels of Q-factor referring to modes in
Fazenda, Bruno   +2 more
core   +4 more sources

q-Factors and Investment CAPM [PDF]

open access: yesSSRN Electronic Journal, 2019
Abstract The Hou–Xue–Zhang q-factor model says that the expected return of an asset in excess of the risk-free rate is described by its sensitivities to the market factor, a size factor, an investment factor, and a return on equity (ROE) factor.
openaire   +2 more sources

Terahertz Guided Mode Resonance Sensing Platform Based on Freestanding Dielectric Materials: High Q-Factor and Tunable Spectrum

open access: yesApplied Sciences, 2020
We theoretically investigated a polyethylene-based rectangular and guided mode resonance (GMR) structure with a circular pattern by using the finite-difference time-domain (FDTD) method in the terahertz region.
Hee Jun Shin, Gyeongsik Ok
doaj   +1 more source

Modelling Q-Factors of Micro Pillars [PDF]

open access: yes2007 9th International Conference on Transparent Optical Networks, 2007
The influence of fabrication induced imperfections on quality factors for a microcavity pillar is studied numerically. The dependence on side-wall inclination and etch variations is quantified.
Nielsen, Torben Roland   +3 more
openaire   +1 more source

Benefits and Limits of Modulation Formats for Optical Communications

open access: yesAdvances in Electrical and Electronic Engineering, 2014
This paper is focused on benefits and limits of intensity and phase modulation formats used in optical communications. The simulation results are obtained using OptSim software environment, employing Time Domain Split Step method.
Rajdi Agalliu, Michal Lucki
doaj   +1 more source

PECULIARITIES OF A WAVEGUIDE-COAXIAL RESONATOR ON THE TEM-OSCILLATIONS WITH A RESONANCE SHORT-CIRCUIT PLUNG-ER [PDF]

open access: yesРадиофизика и электроника, 2017
Tunable resonant structures serve as the basis for many microwave devices (generators, filters, wavemeters). One of the varieties of these structures is waveguide-dielectric and waveguide-coaxial resonators on the evanescent waveguides (WDR and WCR ...
R. I. Belous   +3 more
doaj   +1 more source

Performance Model for Video Service in 5G Networks

open access: yesFuture Internet, 2020
Network slicing allows operators to sell customized slices to various tenants at different prices. To provide better-performing and cost-efficient services, network slicing is looking to intelligent resource management approaches to be aligned to users ...
Jiao Wang   +4 more
doaj   +1 more source

Q-factor measurement of nonlinear superconductingresonators [PDF]

open access: yesElectronics Letters, 2000
12 pages, 4 figures, to appear in Electronics ...
Rao, X.S., Ong, C.K., Feng, Y.P.
openaire   +2 more sources

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