Results 51 to 60 of about 830,623 (154)

Bayesian Optimization for Realistic PPGI Video Synthesis

Current Directions in Biomedical Engineering
A key challenge in photoplethysmography imaging (PPGI) is the limited availability of heterogeneous data. Synthetic data offers a potential solution, but accurately reproducing realistic skin color variations in 3D render engine pipelines depends on ...
Reinhardt Tobias, Rohr Maurice, Dill Sebastian, Reinhold Emily, Hoog Antink Christoph   +4 more
doaj   +1 more source

Efficient Spatiotemporal Attention Network for Remote Heart Rate Variability Analysis

Sensors, 2022
Studies have shown that ordinary color cameras can detect the subtle color changes of the skin caused by the heartbeat cycle. Therefore, cameras can be used to remotely monitor the pulse in a non-contact manner.
Hailan Kuang, Fanbing Lv, Xiaolin Ma, Xinhua Liu   +3 more
doaj   +1 more source

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

Meniscus‐guided organic semiconductor single crystals: From fluid dynamics to morphology control and multifunctional applications

FlexMat, EarlyView.
Centered on the multiscale meniscus, this review dissects mass transport in meniscus‐guided coating into parallel and lateral components. By analyzing the balance of multiple factors during crystallization, it establishes a clear morphology‐performance relationship.
Yumeng Wang, Shengnan Chen, Lutong Guo, Lujing Shao, Zhenhua Li, Hao Liu, Yanlin Song, Yali Qiao   +7 more
wiley   +1 more source

Clinical applications of wearable devices for individuals with at‐risk substance use and substance use disorders: A systematic review

The American Journal on Addictions, EarlyView.
Abstract Background and Objectives Managing substance use disorders (SUDs) is limited by the lack of longitudinal clinical data during active use and recovery. Wearable devices may help address this gap by capturing physiological and behavioral data in real‐world settings.
Alexandra Sas, Matthew E. Sloan, Yaoyi Xing, Ethan Kim, Dhvani Mehta, Anna Mouzenian, Lena C. Quilty, Jeffrey D. Wardell, Shannon Lange, Daniel Felsky, Victor M. Tang   +10 more
wiley   +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

Robust Heart Rate Variability Measurement from Facial Videos

Bioengineering, 2023
Remote Photoplethysmography (rPPG) is a contactless method that enables the detection of various physiological signals from facial videos. rPPG utilizes a digital camera to detect subtle changes in skin color to measure vital signs such as heart rate ...
Ismoil Odinaev, Kwan Long Wong, Jing Wei Chin, Raghav Goyal, Tsz Tai Chan, Richard H. Y. So   +5 more
doaj   +1 more source

Middle Managers' Interface Work: Exploring Micro‐Practices for Co‐Adoption of Emerging Ecosystem Value Propositions

Journal of Management Studies, EarlyView.
Abstract Emerging ecosystem value propositions require collective co‐adoption by heterogeneous stakeholders. Focusing on middle managers (MMs) in ecosystem emergence, we introduce the notion of MM interface work: a form of social‐symbolic work comprising discursive, relational, and material micro‐practices within and across cognitive, behavioural ...
Krithika Randhawa, Wim Vanhaverbeke, Mariano L. M. Heyden, Paavo Ritala   +3 more
wiley   +1 more source

Continual Test-Time Adaptation for Robust Remote Photoplethysmography Estimation

IEEE Access
Remote photoplethysmography (rPPG) estimation has made considerable progress by leveraging deep learning, yet its performance remains highly susceptible to the domain shifts caused by lighting, skin tone and movement, particularly during inference ...
Hyunwoo Lee, Haechang Lee, Byung Hyun Lee, Se Young Chun   +3 more
doaj   +1 more source

Sleep and cardiac autonomic modulation in older adults: Insights from an at‐home study with auditory deep sleep stimulation

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary The autonomic nervous system regulates cardiovascular activity during sleep, likely impacting cardiovascular health. Aging, a primary cardiovascular risk factor, is associated with cardiac autonomic disbalance and diminished sleep slow waves. Therefore, slow waves may be linked to aging, autonomic activity and cardiovascular health. However, it
Stephanie Huwiler, M. Laura Ferster, Luzius Brogli, Reto Huber, Walter Karlen, Caroline Lustenberger   +5 more
wiley   +1 more source