Results 41 to 50 of about 25,281 (243)

Effects of Missing Data on Heart Rate Variability Measured From A Smartwatch: Exploratory Observational Study

JMIR Formative Research
BackgroundMeasuring heart rate variability (HRV) through wearable photoplethysmography sensors from smartwatches is gaining popularity for monitoring many health conditions.
Hope Davis-Wilson, Meghan Hegarty-Craver, Pooja Gaur, Matthew Boyce, Jonathan R Holt, Edward Preble, Randall Eckhoff, Lei Li, Howard Walls, David Dausch, Dorota Temple   +10 more
doaj   +1 more source

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In‐Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

Wearable Tailored Passive Radiative Cooling Textile for Flexible Electronic Integration

Advanced Science, EarlyView.
A scalable, additive‐free wearable tailored passive radiative cooling textile (WRCT) with hierarchically structured fibers delivers exceptional thermal management, combining >95% solar reflectance, 0.96 mid‐infrared emissivity, and ultralow thermal conductivity (0.041 W/m·K).
Lung Chow, Jianpeng Zhang, Zehua Peng, Denglin Ye, Binbin Zhang, Jian Li, Wooyoung Park, Chentao Du, Xingcan Huang, Chun Ki Yiu, Yuze Qiu, Jingkun Zhou, Zhenlin Chen, Yuyu Gao, Weibin Zhu, Pengcheng Wu, Guangyao Zhao, Qiang Zhang, Yuan Guo, Zuowei Sun, Zhan Shen, Shuaiqi Ren, Sang Min Won, Jiyu Li, Xinge Yu   +24 more
wiley   +1 more source

Mathematical Modeling of Arterial Blood Pressure Using Photo-Plethysmography Signal in Breath-hold Maneuver

, 2018
Recent research has shown that each apnea episode results in a significant rise in the beat-to-beat blood pressure and by a drop to the pre-episode levels when patient resumes normal breathing. While the physiological implications of these repetitive and
Alex, Raichel M., Behbehani, Khosrow, Watenpaugh, Donald E., Zadi, Armin Soltan, Zhang, Rong   +4 more
core   +1 more source

Alterations in electrodermal activity and cardiac parasympathetic tone during hypnosis [PDF]

, 2015
Exploring autonomic nervous system (ANS) changes during hypnosis is critical for understanding the nature and extent of the hypnotic phenomenon and for identifying the mechanisms underlying the effects of hypnosis in different medical conditions.
Kekecs, Z, Szekely, A, Varga, K
core   +1 more source

Silicon‐Embedded Multifunctional Heterogeneous Integration for Miniaturized Photoplethysmography Detection Devices

Advanced Science, EarlyView.
ABSTRACT The multifunctional integration of chips with high flexibility and scalable manufacturing is crucial for enhancing chip performance, reducing chip size, and simplifying chip design. However, balancing volume, cost, flexibility, and functionality using traditional heterogeneous integration methods is challenging.
Lang Chen, Shizun Hu, Zhou Yang, Shitao Shen, Pan Zhang, Han Xu, Chi Zhang, Wei Wang   +7 more
wiley   +1 more source

Design of an oximeter based on LED-LED configuration and FPGA technology [PDF]

, 2013
sensor
Allen, Anliker, Dejan Karadaglic, Gil, Lau, Mendelson, Miyazaki, Phillips, Radovan Stojanovic, Rhee, Soguel Schenkel, Stojanovic   +11 more
core   +3 more sources

Semi‐Transparent Organic Photodiodes with Near‐Infrared Detection Fabricated by Inkjet Printing

Advanced Electronic Materials, EarlyView.
This work shows the inkjet printing of semi‐transparent and opaque organic photodiodes that enable light detection in the near‐infrared regime. Their transparency and high detection speed make them ideal for applications in soft robotics, wearable devices, and light communication systems.
Luis Arturo Ruiz‐Preciado, Peter Krebsbach, Mervin Seiberlich, Gerardo Hernandez‐Sosa   +3 more
wiley   +1 more source

Restoration of microhemodynamics on the human body surface using the fractional derivative of temperature oscillations [PDF]

Известия Саратовского университета. Новая серия: Физика
Background and Objectives: The possibility of restoring microhemodynamics on the human body surface was investigated through the analysis of skin temperature oscillation signals using integer and fractional order derivatives.
Sagaidachnyi, Andrey Aleksandrovich, Volkov, Ivan Yu., Zaletov, Ivan Sergeevich, Mayskov, Dmitriy Igorevich, Fomin, Andrey Vladimirovich, Antonov, Andrey V., Tsoy, Mariya Olegovna, Skripal, Anatoly Vladimirovich   +7 more
doaj   +1 more source

Possibilities of Pulse Wave Contour Analysis in Diagnostics of Early Vascular Aging

Рациональная фармакотерапия в кардиологии, 2020
Aim. To study the possibilities of photoplethysmography (PPG) in evaluation of arterial stiffness, arterial age and early vascular aging (EVA) in healthy individuals and patients with cardiovascular risk factors.Material and methods.
A. M. Tuktarov, A. E. Filippov, A. A. Obrezan, L. V. Kukol'   +3 more
doaj   +1 more source