Results 41 to 50 of about 1,748,185 (181)

Self‐Powered All‐in‐One Wearable Bioelectronics Driven by Pneumatic Energy Buffering of Daily Footsteps

Advanced Science, EarlyView.
A pneumatic energy‐buffering strategy transforms transient and intermittent footsteps into quasi‐continuous electrical energy for a self‐powered wearable biosensing platform. The footwear‐integrated air‐pumping harvester, combined with the rationally designed power‐management system, powers a wearable ankle PPG device with reduced motion artifacts ...
Ji‐Seok Kim, Tae Woog Kang, Hyunjoon Yoo, Jawon Ha, Yunuo Huang, Hee Han, Chi Won Ahn, Woon‐Hong Yeo, Il‐Kwon Oh   +8 more
wiley   +1 more source

Self‐Sustaining Sensing Systems: Integration Strategies and Signal–Power Matching in Energy‐Harvesting Electronics

Advanced Science, EarlyView.
Energy‐harvesting‐integrated sensors couple ambient energy conversion with sensing, processing, and wireless communication. This review organizes recent progress through integration architectures and operating principles, revisiting co‐packaged, monolithic, and co‐functional designs together with always‐on, event‐driven, and multi‐modal sensing modes ...
Taehyun Park, Ki‐Yoon Park, Yeonho Choi, Dong‐Myeong Shin, Hong‐Joon Yoon, Hocheon Yoo   +5 more
wiley   +1 more source

Analysis of differences between contact and non-contact estimation of blood pressure

Current Directions in Biomedical Engineering
Blood pressure (BP) is a key indicator for cardiac diseases. Although many current works focus on estimating BP using photoplethysmography (PPG), the number of works using imaging PPG, i.e.
Sahl Fabienne, Zaunseder Sebastian
doaj   +1 more source

Heart rate monitoring in ultra-high-field MRI using frequency information obtained from video signals of the human skin compared to electrocardiography and pulse oximetry

Current Directions in Biomedical Engineering, 2015
Videos of the human skin contain subtle color variations associated with the blood volume pulse. This remote photoplethysmography signal can be used for heart rate monitoring and represents an alternative to signals obtained from contact-based hardware ...
Spicher Nicolai, Maderwald Stefan, Ladd Mark E., Kukuk Markus   +3 more
doaj   +1 more source

Bio‐Inspired Internal Stress Engineering for Microscale Surface Cracking in Sensitive Strain Sensors

Advanced Science, EarlyView.
This study presents a bio‐inspired internal stress engineering strategy to fabricate highly sensitive crack‐based strain sensors. By harnessing the internal expansion energy of microspheres and the thickness‐dependent brittle‐to‐ductile transition of ultrathin gold films, tunable microscale cracks are generated.
Jae Yeong Jang, Hanchul Cho, Young Jung
wiley   +1 more source

ASSESSMENT OF CUTANEOUS BLOOD FLOW IN LOWER EXTREMITIES BY IMAGING PHOTOPLETHYSMOGRAPHY METHOD [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
Subject of Research. The paper presents effective application of the novel imaging photoplethysmography method for receiving data on reaction of peripheral blood flow in lower extremities on venous occlusion. Method.
Valeriy V. Zaytsev, Oleg V. Mamontov, Alexey A. Kamshilin   +2 more
doaj   +1 more source

Wafer‐Scale Dendritic Nanoporous Platinum Films for Neural Electrodes

Advanced Science, EarlyView.
Wafer‐scale dendritic nanoporous platinum films with intrinsic nanoscale porosity are synthesized by suraface‐confined wet chemistry and transferred onto flexible substrates to create tissue‐conformal neural electrodes. The ultrathin films combine mechanical flexibility with electrochemical stability, enabling low‐impedance, high‐capacitance interfaces
Kyeongbin Kang, Joosung Oh, Soumen Dutta, Sun Woo Jang, Byeong Su Gu, Woosung Cho, Mingyu Kwak, Sunguk Hong, Seongjae Lee, Hyo Kyoung Jeon, Juwan Han, Keehoon Kim, Sung‐Min Park, Unyong Jeong, In Su Lee   +14 more
wiley   +1 more source

Perovskite Photodetectors at the Intelligence Frontier: From Tunable Materials to Adaptive Optoelectronic Systems

Carbon Energy, EarlyView.
This comprehensive review presents a progressive roadmap for perovskite vision detectors. Centered on perovskite‐based artificial perception, the graphic illustrates a systematic evolution: starting with fundamental material engineering and device architectures, advancing toward complex functional strategies such as flexible neuromorphic imaging ...
Chenglong Li, Wei Qu, Deepak Kumar, Naini Jain, Nur Wardina Syahirah binti Mohamad Fadil, Nur Najiha binti Ahmad Rasid, Emannuel Kymakis, Maria Vasilopoulou, Chunxiong Bao, Feng Gao, Peng Gao, Sanjeev Kumar Sharma, Mohammad Khaja Nazeeruddin, Abd. Rashid bin Mohd Yusoff, Haotong Wei   +14 more
wiley   +1 more source

Noise‐Blocking Interfacial Lamination of Small‐Molecule Acceptors for Enhanced Signal Clarity in Organic Photodetectors

Carbon Energy, EarlyView.
The structural design strategy employing the Y6‐BO interfacial lamination suppresses dark current by limiting solvent‐induced interfacial damage through the formation of uniformly arranged interfaces while optimizing charge transport to achieve superior detectivity.
Jihyun Lim, Hyunguk Park, Woongsik Jang, Jae Hyun Jeong, Dong Hwan Wang   +4 more
wiley   +1 more source

Toward-1mm depth precision with a solid state full-field range imaging system [PDF]

, 2006
Previously, we demonstrated a novel heterodyne based solid-state full-field range-finding imaging system. This system is comprised of modulated LED illumination, a modulated image intensifier, and a digital video camera. A 10 MHz drive is provided with 1
Dorrington, Adrian A., Carnegie, Dale A., Cree, Michael J.   +2 more
core   +1 more source