Results 81 to 90 of about 4,744 (216)

Climate Change Likely to Intensify Storm‐Driven Compound Flooding in an Exemplar UK Estuary

open access: yesEarth's Future, Volume 13, Issue 12, December 2025.
Abstract Flood protection authorities are not prepared for compound flood risk in estuaries—now and in the face of climate change. Climate projections are rarely downscaled appropriately to assess future changes in storm surge and concurrent river discharge extremes, and their interactions to exacerbate flooding.
Charlotte Lyddon   +7 more
wiley   +1 more source

Tunable metamaterial bandstop filter based on ferromagnetic resonance

open access: yesAIP Advances, 2015
Tunable wideband microwave bandstop filters have been investigated by experiments and simulations. The negative permeability is realized around the ferromagnetic resonance frequency which can be influenced by the demagnetization factor of the ferrite ...
Qingmin Wang   +3 more
doaj   +1 more source

Waveguide bandstop filter based on irises and double corrugations for use in industrial microwave ovens [PDF]

open access: yes, 2012
In this reported work it is shown that one of the most employed filtering systems for use in continuous-flow industrial microwave ovens, namely doubly corrugated filters, does not work properly for many values of the electric permittivity of the ...
Catalá Civera, José Manuel   +5 more
core   +2 more sources

Topological Data Analysis Based Characteristics of Electroencephalogram Signals in Children With Sleep Apnea

open access: yesJournal of Sleep Research, Volume 34, Issue 6, December 2025.
ABSTRACT This study aims to identify differences in the functional neural connectivity of the brain of paediatric patients with obstructive sleep apnea. Using EEG signals from 3673 paediatric patients, we grouped subjects into OSA or control groups based on sleep oxygen desaturation levels and apnea‐hypopnea index (AHI), and applied topological data ...
Aarti Sathyanarayana   +2 more
wiley   +1 more source

A Design of a Terahertz Microstrip Bandstop Filter with Defected Ground Structure

open access: yesActive and Passive Electronic Components, 2013
A planar microstrip terahertz (THz) bandstop filter has been proposed with defected ground structure with high insertion loss (S21) in a stopband of −25.8 dB at 1.436 THz.
Arjun Kumar, M. V. Kartikeyan
doaj   +1 more source

Novel microstrip bandstop filter

open access: yesElectronics Letters, 1977
A microstrip bandstop filter is described that overcomes the problems of radiation and surface-wave generation at high frequencies (40 GHz). An attenuation greater than 17 dB has been measured over at least a 10% bandwidth. The peak attenuation in the band can exceed 30 dB.
openaire   +1 more source

Broadband RCS Reduction of Microstrip Patch Antenna Using Bandstop Frequency Selective Surface [PDF]

open access: yes, 2013
In this article, a simple and effective approach is presented to reduce the Radar Cross Section (RCS) of microstrip patch antenna in ultra broad frequency band.
Cao, X. Y.   +4 more
core   +1 more source

Electromagnetic Design of Dual Resonant Structures for Improved Sensitivity of Terahertz Label Free Bio-Sensing

open access: yes, 2010
A design is proposed exploiting full wave numerical simulation of a dual resonant structure with an aim to sense small amounts of chemical and biochemical materials. The structure is energized with free space radiation in the terahertz regime.
Rotaru, Mihai, Sykulski, Jan
core   +1 more source

Wideband and UWB antennas for wireless applications. A comprehensive review [PDF]

open access: yes, 2017
A comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented. Planar,
Cicchetti, Renato   +2 more
core   +3 more sources

Tunable bound states in the continuum through hybridization of 1D and 2D metasurfaces

open access: yesNanophotonics, Volume 14, Issue 27, Page 4973-4981, December 2025.
Abstract This work presents a novel approach to create and dynamically control quasi‐bound states in the continuum (BIC) resonances through the hybridization of 1D and 2D metasurfaces using micro‐electromechanical systems (MEMS). The quasi‐BIC resonance’s central wavelength and quality factor are precisely tuned by introducing out‐of‐plane symmetry ...
Fedor Kovalev   +3 more
wiley   +1 more source

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