Results 71 to 80 of about 6,144 (263)

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

Journal 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, Shashank Manjunath, Jose A. Perea   +2 more
wiley   +1 more source

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

Nanophotonics, 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, Mariusz Martyniuk, Andrey Miroshnichenko, Ilya Shadrivov   +3 more
wiley   +1 more source

Compact Millimeter-Wave Bandpass Filters Using Quasi-Lumped Elements in 0.13-um (Bi)-CMOS Technology for 5G Wireless Systems [PDF]

, 2019
© 2019 IEEE.A design methodology for a compact millimeter-wave on-chip bandpass filter (BPF) is presented in this paper. Unlike the previously published works in the literature, the presented method is based on quasi-lumped elements, which consists of a ...
Bautista, Meriam Gay, Dutkiewicz, Eryk, Sun, Yichuang, Yang, Yang, Zhu, He, Zhu, Xi   +5 more
core   +2 more sources

Spatial mapping of dissolved methane using an in situ sensor in Puget Sound

Limnology and Oceanography: Methods, Volume 23, Issue 11, Page 804-814, November 2025.
Abstract Release of methane, as gas bubbles or in the dissolved phase, from the seafloor has been observed in coastal waters (< 200 m) and deep ocean basins (> 1000 m). Methane dissolution within the water column affects the geochemistry of the surrounding water, leading to localized oxygen loss and potential escape to the atmosphere, particularly from
Alexandra M. Padilla, William Pardis, Jason Kapit, Tor A. Bjorklund, Nicholas D. Ward, Daniel J. Fornari, Susan Hautala, William F. Waite, H. Paul Johnson, Anna P. M. Michel   +9 more
wiley   +1 more source

Integration of Second-Order Bandstop Filter Into a Dual-Polarized 5G Millimeter-Wave Magneto-Electric Dipole Antenna [PDF]

, 2023
Jiangcheng Chen, Markus Berg, Kimmo Rasilainen, Zeeshan Siddiqui, Marko E. Leinonen, Aarno Pärssinen   +5 more
openalex   +1 more source

Tunable metamaterial bandstop filter based on ferromagnetic resonance

AIP 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, Lingyu Zeng, Ming Lei, Ke Bi   +3 more
doaj   +1 more source

Computational modelling of the impact of anatomical changes on ECGs in left ventricular hypertrophy

The Journal of Physiology, Volume 603, Issue 19, Page 5387-5413, October 1, 2025.
Abstract figure legend Eccentric and concentric left ventricular hypertrophy distinctly alter 12‐lead ECG signals. Eccentric hypertrophy predominantly increases voltages in the precordial leads, whereas concentric hypertrophy affects voltages across all leads in a variable manner.
Mohammadreza Kariman, Karli Gillette, Matthias A. F. Gsell, Anton J. Prassl, Gernot Plank, Christoph M. Augustin   +5 more
wiley   +1 more source

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

Active 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

Design and Characterization of MSAP‐Fabricated Sub‐THz Frequency Selective Surface by Bench‐Top Optoelectronic Measurement System

Microwave and Optical Technology Letters, Volume 67, Issue 9, September 2025.
ABSTRACT A low‐cost and compact benchtop using the off‐the‐shelf optoelectronic (OE) measurement system is presented which is built to measure the performance of a 160 GHz frequency selective surface (FSS). The system uses an optical heterodyne source to excite wireless signals through the ‐D‐band (110–170 GHz), and transmission magnitude is measured ...
Keigan Macdonell, Takashi Tomura, Shulabh Gupta   +2 more
wiley   +1 more source

High‐Quality‐Factor, Compact Nanoplasmonic Filter Utilizing Graphene Metasurface at Near‐Infrared Range

Advanced Photonics Research, Volume 6, Issue 8, August 2025.
A plasmonic reflective filter utilizing monolayer graphene is proposed and theoretically examined. The filter demonstrates dual‐band reflection and absorption characteristics at resonance wavelengths in the near infrared. The reflection dips is adjusted by manipulating the chemical potential of graphene.
Mohammad Sadegh Zare, Asma Attariabad, Sevda Seyedmasoumian, Ali Farmani   +3 more
wiley   +1 more source