Results 41 to 50 of about 1,547 (268)

Pushing the limits of remote RF sensing by reading lips under the face mask

Nature Communications, 2022
This study aims to solve the fundamental limitations of camera-based systems by proposing a contactless and privacy-preserving radio frequency-based lip-reading framework, which can recognise lip movements under face masks.
Hira Hameed, Muhammad Usman, Ahsen Tahir, Amir Hussain, Hasan Abbas, Tie Jun Cui, Muhammad Ali Imran, Qammer H. Abbasi   +7 more
doaj   +1 more source

Closed-Form Power Normalization Methods for a Satellite MIMO System

Sensors, 2022
The paper proposes a new set of normalization techniques for precoding/beamforming matrices applicable to broadband multiuser multiple-input multiple-output (MIMO) satellite systems.
Andrea Segneri, Alejandro Baldominos, George Goussetis, Alberto Mengali, Nelson J. G. Fonseca   +4 more
doaj   +1 more source

Millimetre-wave optics design & verification [PDF]

AIP Conference Proceedings, 2002
Microwave background astronomy requires very high performance millimetre-wave optical systems. However, compact quasi-optics are difficult to design with any confidence using techniques developed for visible wavelengths. In this paper we investigate the performance of existing software design tools (ASAP, CODE V, GLAD) as well as a Gaussian beam mode ...
O'Sullivan, Créidhe, Murphy, J.Anthony, Withington, Stafford, Yassin, Ghassan, Atad-Ettedgui, Eli, Duncan, William, Henry, David, Jellema, Willem, van de Stadt, H.   +8 more
openaire   +2 more sources

Elevated Connectivity During Language Processing Is Associated With Cognitive Performance in SeLECTS

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Self‐Limited Epilepsy with Centrotemporal Spikes (SeLECTS) is associated with language impairments despite seizures originating in the motor cortex, suggesting aberrant cross‐network interactions. Here we tested whether functional connectivity in SeLECTS during language tasks predicts language performance.
Wendy Qi, Katharine Lee, Kerry C. Nix, Miguel Menchaca, Xiwei Shé, Lorelei Santa Maria, Wei Wu, Zihuai He, Fiona M. Baumer   +8 more
wiley   +1 more source

NUMERICAL SIMULATION OF STRESS WAVE PROPAGATION IN SAP CONCRETE [PDF]

Civil Engineering Journal, 2018
The SAP (Super Absorbent Polymers) concrete is a new kind of concrete materials with uniformly distributed spherical pores with diameter of millimetre-size.
Zhenqun Sang, Zhiping Deng, Jianglin Xi, Huibin Yao, Jiang Wu   +4 more
doaj   +1 more source

Clinical Outcomes of SEEG‐Guided Radiofrequency Thermocoagulation in Children With Focal Drug‐Resistant Epilepsy: A Multicenter Real‐World Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Stereoelectroencephalography‐guided radiofrequency thermocoagulation (SEEG‐RFTC) has emerged as a safe and effective minimally invasive treatment for children with drug‐resistant focal epilepsy. Although evidence from real‐world studies remains limited, numerous pediatric cases have demonstrated promising outcomes. This retrospective
Weitao Chen, Stéphane Jean, Weihong Liu, Yihai Dai, Xinrong Fang, Xiaoqiang Wei, Shan Chen, Shiwei Song   +7 more
wiley   +1 more source

Collocated MIMO travelling wave SIW slot array antennas for millimetre waves

IET Microwaves, Antennas & Propagation, 2021
A novel four‐element collocated travelling wave substrate integrated waveguide (SIW) multiple‐input multiple‐output (MIMO) antenna covering millimetre wave (mm‐wave) bands (28–32 GHz) is presented. The antenna exhibits a matching bandwidth of more than 4 
Asim Ghalib, Mohammad S. Sharawi, Raj Mittra, Hussein Attia, Atif Shammim   +4 more
doaj   +1 more source

Radar cross‐section measurement in millimetre‐wave for passive millimetre‐wave identification tags

IET Microwaves, Antennas & Propagation, 2015
The passive millimetre‐wave identification (MMID) technology was introduced few years ago, exploiting the advantages of the passive ultra‐high frequency (UHF) radio frequency identification (RFID). The communication is based on backscattering modulation, related to the radar cross‐section (RCS) of the transponder.
Hotte, David, Siragusa, Romain, Duroc, Yvan, Tedjini, Smail   +3 more
openaire   +3 more sources

Neurovascular Contacts in the Pathophysiology of Neuralgic Amyotrophy: An Observational Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neuralgic amyotrophy (NA) is a prevalent, monophasic, multifocal immune‐mediated neuropathy. A distinctive characteristic of the disease is the occurrence of nerve or fascicle constrictions and torsions (NA‐associated focal nerve lesions, NAFL). The pathophysiology underlying this phenomenon remains to be fully elucidated.
Johannes Fabian Holle, Andreas Leha, Volker Limmroth, Wolfram Windisch, Maximilian Zimmermann   +4 more
wiley   +1 more source

Efficient waveguide power combiners at mm‐wave frequencies

IET Microwaves, Antennas & Propagation, 2023
In this study, an efficient power combiner for mm‐wave frequency transmitters is investigated. The combiner is based on a parallel plate waveguide (PPW) excited with multiple parallel feeds.
Ralph M. vanSchelven, Marco Spirito, Daniele Cavallo   +2 more
doaj   +1 more source