Results 71 to 80 of about 26,636 (252)

Flexible wearable electronics for cardiovascular monitoring from surface signals to deep physiological insights

FlexMat, EarlyView.
This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen, Hongwen Chen, Yuanyuan Li, Pingan Yang, Rui Li, Zhihao Zhou   +5 more
wiley   +1 more source

Research progress on the use of the optical coherence tomography system for the diagnosis and treatment of central nervous system tumors

Ibrain, Volume 11, Issue 1, Page 3-18, Spring 2025.
With the advantages of high‐resolution imaging, efficient image acquisition, intraoperative real‐time detection, and radiation‐free and noninvasive characteristics, optical coherence tomography (OCT) provides accurate diagnosis and effective intraoperative guidance for the minimally invasive diagnosis and treatment of central nervous system (CNS ...
Jiuhong Li, Ziba Ayi, Gonggong Lu, Haibo Rao, Feilong Yang, Jing Li, Jiachen Sun, Junlin Lu, Xulin Hu, Si Zhang, Xuhui Hui   +10 more
wiley   +1 more source

Vehicle-to-Vehicle Radio Channel Characteristics for Congestion Scenario in Dense Urban Region at 5.9 GHz

International Journal of Antennas and Propagation, 2018
This paper reports the results of a car-following measurement of the wireless propagation channel at 5.9 GHz on a seriously congested urban road in Wuhan, China.
Yishui Shui, Fang Li, Junyi Yu, Wei Chen, Changzhen Li, Kun Yang, Fuxing Chang   +6 more
doaj   +1 more source

Spectrum-Efficient Distributed Compressed Sensing Based Channel Estimation for OFDM Systems Over Doubly Selective Channels

IEEE Access, 2019
In this paper, we deal with channel estimation (CE) for high-mobility orthogonal frequency division multiplexing (OFDM) systems. To make the numerous (unknown) estimation for the high-mobility OFDM systems practicable, the channels are assumed to be time-
Anthony Ngozichukwuka Uwaechia, Nor Muzlifah Mahyuddin   +1 more
doaj   +1 more source

Pelvic venous disorders in women: Diagnosis and management for gynecologists

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Pelvic venous disorders (PeVD) are an underrecognized yet significant cause of chronic pelvic pain (CPP) in reproductive‐aged women, characterized by venous reflux, obstruction, or both. This clinical opinion provides a practical overview of PeVD for gynecologists, outlining its pathophysiology, common presentations, diagnostic approach, and ...
Tiffany Ni, Inbar Friedman, Jessica Smith, Brian Liu, Mary Melchior, Andrew D. Brown   +5 more
wiley   +1 more source

Sparse-Recovery-Based Channel Estimation in Orthogonal Time-Frequency Space Modulation for High-Mobility Scenarios in 5G and Beyond

Journal of Communications Software and Systems
Orthogonal time frequency space (OTFS) modulation is a breakthrough waveform that significantly outperforms conventional modulation schemes in high-mobility scenarios. Unlike traditional approaches that operate in the time-frequency domain, OTFS exploits
Sundaresan Sabapathy, Surendar Maruthu, Deepika Sasi   +2 more
doaj   +1 more source

Delay-doppler-based key generation using OTFS

, 2023
Key generation for secure communication is challenging in high-mobility scenarios due to the low coherence time. This is further exacerbated in frequency-division duplex systems due to the non-reciprocal wireless channel in uplink and downlink.
Solaija, Muhammad Sohaib J., Zegrar, Salah Eddine, Arslan, Hüseyin   +2 more
core   +1 more source

Transcranial Color‐Coded Duplex Sonography in Large‐Vessel Vasculitis Compatible With Takayasu Arteritis Presenting Intracranial Involvement and Vertebrobasilar Dolichoectasia: A Case Report

Journal of Clinical Ultrasound, EarlyView.
This case illustrates sequential intracranial occlusions in large‐vessel vasculitis compatible with Takayasu arteritis preserving perfusion through robust collateral pathways. Transcranial color‐coded duplex sonography identified characteristic blunted flow patterns and focal turbulence, underscoring its value in detecting hemodynamic compromise beyond
Maria Júnia Lira e Silva, Jordana Gaudie Gurian, Isabella Mesquita Venâncio, Eva Carolina Rocha, Gisele Sampaio Silva   +4 more
wiley   +1 more source

Complaints Involving Sonographers: What Three Decades of Cases From A Public New Zealand Database Can Teach Us

Journal of Medical Radiation Sciences, EarlyView.
Health consumer complaints to the New Zealand Health and Disability Commissioner involving sonographers are rare, totalling 15 in the last 31 years and averaging 1.5 cases per year over the last decade. A large proportion of complaints involve an undetected finding, obstetric examination and private setting.
Martin Necas, Claire Calver, Alex Hill, Danielle Mourits, Sarah Park, Carla Smith   +5 more
wiley   +1 more source

Research status of channel estimation and signal detection techniques for orthogonal time frequency space modulation

Tongxin xuebao
Orthogonal time frequency space (OTFS) modulation is a multiplexing technique designed in the two-dimensional (2D) delay-Doppler domain suited for high Doppler fading channels. OTFS converts a doubly-selective channel into an almost non-fading channel in
WANG Yongchuan, ZHOU Ping, HUANG Ju
doaj   +2 more sources