Results 101 to 110 of about 2,241 (208)

A high-resolution resonant MEMS accelerometer

, 2015
This paper reports on a vacuum packaged resonant MEMS accelerometer that demonstrates some of the highest sensitivities reported to-date and a ∼7x scale factor enhancement relative to a recently reported prototype, benefiting from a larger proof mass and
Zou, X, Seshia, AA, ,
core  

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

A Micromachined Silicon-on-Glass Accelerometer with an Optimized Comb Finger Gap Arrangement

Micromachines
This paper reports the design, fabrication, and characterization of a MEMS capacitive accelerometer with an asymmetrical comb finger arrangement. By optimizing the ratio of the gaps of a rotor finger to its two adjacent stator fingers, the sensitivity of
Jiacheng Li, Rui Feng, Xiaoyi Wang, Huiliang Cao, Keru Gong, Huikai Xie   +5 more
doaj   +1 more source

Association Between Sleep Quality and Oxidative Stress in Postoperative Cardiovascular Patients—A Pilot Study

Journal of Sleep Research, EarlyView.
In 15 postoperative cardiac surgery patients, venous reactive oxygen species (ROS) measured by electron spin resonance (ESR) over 48 h showed no consistent circadian pattern. Higher ROS was associated with lower subjective sleep efficiency and more nocturnal awakenings, but not with other sleep measures.
K. Krawczyk, D. Riemann, E. Schleicher, A. Günther, A. Ayekoi, M. Czerny, J. S. Pooth, T. Böhmerle, B. Feige, J. Sahlmann, F. Beyersdorf   +10 more
wiley   +1 more source

NEX4EX – A novel exercise device enabling resistive, plyometric and sensorimotor training during deep‐space missions: A case report

Experimental Physiology, EarlyView.
Abstract During weightlessness, the human neuro–muscular–skeletal system undergoes maladaptation to the microgravity environment. The European Space Agency (ESA) project NEX4EX, ‘Novel Exercise Hardware for Exploration’, developed an advanced multipurpose exerciser offering resistive (RES), plyometric (PLYO) and sensorimotor (SENSO) exercises.
Jonas Böcker, Jochen Zange, Markus Gruber, Guillaume Fau, Rainer Rawer, Sören Törholm, Arnaud Runge, Jörn Rittweger   +7 more
wiley   +1 more source

Amplitude-modulated resonant accelerometer employing parametric pump

, 2020
This paper demonstrates a resonant accelerometer employing weakly coupled resonators for inertial force transduction. An ultra-low virtual mode coupling is established by employing the parametric pump in the coupled resonators to enhance the parametric ...
Zhao, C, Seshia, A, Pandit, M, Chen, D, ,, Zhang, H, Sun, J   +6 more
core  

Lifestyle modification in atrial fibrillation: Mechanisms, phenotypes and ablation outcomes

Experimental Physiology, EarlyView.
Abstract Atrial fibrillation (AF) is the most prevalent sustained cardiac arrhythmia and is associated with significant morbidity, mortality and healthcare utilization. Catheter ablation is increasingly used as a rhythm‐control intervention for patients with symptomatic paroxysmal and persistent AF, yet recurrence rates remain suboptimal.
Konstantinos Grigoriou, Paschalis Karakasis, Panagiotis Theofilis, Konstantinos Pamporis, Panayotis K. Vlachakis, Anastasios Apostolos, Nikolaos Ktenopoulos, Barbara Fyntanidou, Efstratios Karagiannidis, Dimitrios Patoulias, Antonios P Antoniadis, Nikolaos Fragakis   +11 more
wiley   +1 more source

Non linear response and optimization of a new z-axis resonant micro-accelerometer

, 2016
Micro-Electro-Mechanical Systems (MEMS) accelerometers are micro-sized devices largely used for de- tecting accelerations in the consumer and automotive market. Both capacitive and resonant sensing have been successfully employed in these devices. In the
ZEGA, VALENTINA, CORIGLIANO, ALBERTO, COMI, CLAUDIA, Zerbini, Sarah   +3 more
core   +1 more source

Oxidative stress and impaired cardiovagal baroreflex sensitivity in young adults with post‐traumatic stress disorder

Experimental Physiology, EarlyView.
Abstract Post‐traumatic stress disorder (PTSD) is associated with elevated cardiovascular disease (CVD) risk, yet the underlying physiological characterization in young adults remain unclear. This study examines whether autonomic and/or vascular dysfunction predominates as an early precursor to CVD development in young adults with PTSD and explores the
Jennifer B. Weggen, Jacob W. Richardson, Emily A. Buck, Brad T. Bakken, Brandon J. Fitzpatrick, Raven G. Campbell, Ryan S. Garten   +6 more
wiley   +1 more source

Mitigation of Mechanical Crosstalk in Resonant Beam Accelerometers

IEEE Sensors Journal
Resonant MEMS beam accelerometers have demonstrated remarkable sensitivity and stability, enabling applications in seismology and gravimetry while keeping a small footprint. However, mechanical cross-talk and resonance mode coupling have shown to be specially detrimental to the operation of this kind of accelerometers, especially when employing nano ...
Théo Miani, Thierry Verdot, Audrey Berthelot, Federico Maspero, Alexandra Koumela, Philippe Robert, Giacomo Langfelder, Julien Arcamone, Marc Sansa   +8 more
openaire   +2 more sources