Results 31 to 40 of about 87,849 (169)

Actigraph Accelerometer-Defined Boundaries for Sedentary Behaviour and Physical Activity Intensities in 7 Year Old Children [PDF]

, 2011
Background: Accurate objective assessment of sedentary and physical activity behaviours during childhood is integral to the understanding of their relation to later health outcomes, as well as to documenting the frequency and distribution of physical ...
Cortina-Borja, M, Carly Rich, Richard M. Pulsford, Lucy J. Griffiths, Dezateux Carol, Lucy Griffiths, Kinnafick Florence-Emilie, Kinnafick, FE, Lucy J Griffiths, Dezateux, C, Richard M Pulsford, Mario Cortina-Borja, Griffiths Lucy J., Kinnafick, F-E, Rich, C, Florence-Emilie Kinnafick, Kinnafick, Florence-Emilie, Cortina-Borja Mario, Carol Dezateux, Pulsford, R M, Griffiths, LJ, Rich Carly, Pulsford Richard M., Pulsford, RM, Griffiths, L J   +24 more
core   +1 more source

Research on adaptive modulus maxima selection of wavelet modulus maxima denoising

The Journal of Engineering, 2018
Microelectromechanical system (MEMS) accelerometers are small in size, low in power consumption and easily integrated. They can be used in intelligent hydraulic components to obtain the dynamic acceleration of the system and monitor the operating status ...
Wensi Ding, Zhiguo Li
doaj   +1 more source

Coherence‐Gated Mirau Interferometry for Single‐Shot Quantitative Phase Imaging and Motion Sensing

Laser &Photonics Reviews, Volume 20, Issue 10, 22 May 2026.
This paper presents a compact add‐on module converting a Mirau or other on‐axis interferometer into a single‐shot quantitative phase imaging system using coherence gating and precise optical path matching. Demonstrations include time‐resolved imaging of human cells and streaming red blood cells, visualization of evaporation dynamics in liquid mixtures,
Petr Bouchal, Martin Konečný, Zdeněk Nováček, Radim Chmelík, Zdeněk Bouchal   +4 more
wiley   +1 more source

Numerical Model and Experimental Validation of Composite Metal Foam in Protecting Carbon Steel Against Puncture

Advanced Engineering Materials, Volume 28, Issue 1, January 2026.
The puncture prevention and energy absorption performance of composite metal foam (CMF) are studied experimentally and numerically for hazardous materials transportation protection. The numerical model implementing air within the CMF (nonhomogeneous model using fluid cavity technique) predicts puncture more accurately compared to the homogeneous CMF ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

Study on the Influence of Tunnel Clearance on the Long‐Term Settlement of Parallel Twin Subway Tunnels

Shock and Vibration, Volume 2026, Issue 1, 2026.
To investigate the effect of tunnel clearance on long‐term soil settlement around tunnels under cyclic subway loading, a three‐dimensional (3D) track–tunnel–soil coupling numerical model was established using MIDAS software, with Shanghai Metro Line 1 as the case study.
Chunling Yan, Guangshuai Wang, Biaowei Sang, Qian Lv, Zhongcai Lin, Shangyuan Chen, Junhong Park   +6 more
wiley   +1 more source

Wafer Bonding Technologies for Microelectromechanical Systems and 3D ICs: Advances, Challenges, and Trends

Advanced Engineering Materials, Volume 27, Issue 20, October 2025.
This review explores wafer bonding technologies, covering wafer preparation, activation methods, and bonding mechanisms. It compares direct and indirect bonding, highlights recent advancements and future trends, and examines applications in 3D integration and packaging.
Abdul Ahad Khan, Tuan‐Khoa Nguyen, Quang Thang Trinh, Nam‐Trung Nguyen, Dzung Viet Dao, Yong Zhu   +5 more
wiley   +1 more source

MEMS: The Sensory Nervous System for Embodied AI Robots

SmartBot, Volume 1, Issue 3, September 2025.
Embodied AI represents a shift of intelligence from virtual to physical realms, calling for efficient and multimodal perceptual capabilities. This review illustrates how Micro‐Electro‐Mechanical Systems (MEMS) offer miniaturized, low‐power sensors such as those for ranging, inertia, touch, sound and smell, which serve as robotic “sensory organs”.
Xu Zhou, Dongsheng Li, Shuhan He, Mengyao Xiao, Zhouli Sui, Fusheng Zha, Lining Sun, Chengkuo Lee, Huicong Liu   +8 more
wiley   +1 more source

Oxide Membranes from Bulk Micro‐Machining of SrTiO3 Substrates

Advanced Science, Volume 12, Issue 20, May 29, 2025.
Bulk‐micromachining of SrTiO3 substrates is employed to realize suspended structures made of epitaxial thin films of complex oxides such as trampoline resonators and sealed membranes with physical access from both sides. The fabrication protocol relies on wet chemical etching of SrTiO3 and uses (La,Sr)MnO3 as hard mask and device layers.
Nicola Manca, Alejandro E. Plaza, Leonélio Cichetto, Warner J. Venstra, Cristina Bernini, Daniele Marré, Luca Pellegrino   +6 more
wiley   +1 more source

Performance-increasing technique in micromechanical accelerometer development

Journal of Physics: Conference Series, 2020
Abstract Requirements for higher-performance on-board control systems and instruments applied in a variety of small-scale moving objects results in the necessity to develop micromechanical sensors – small, lightweight, energy-efficient and, at the same time, offering high-reliability performance and easy-to-use.
D Yu Ershov, I N Lukyanenko, E E Aman
openaire   +1 more source

Reduced Order Modelling of Fully Coupled Electro‐Mechanical Systems Through Invariant Manifolds With Applications to Microstructures

International Journal for Numerical Methods in Engineering, Volume 126, Issue 3, 15 February 2025.
ABSTRACT This article presents the first application of the direct parametrisation method for invariant manifolds to a fully coupled multiphysics problem involving the nonlinear vibrations of deformable structures subjected to an electrostatic field. The formulation proposed is intended for model order reduction of electrostatically actuated resonating
Attilio Frangi, Alessio Colombo, Alessandra Vizzaccaro, Cyril Touzé   +3 more
wiley   +1 more source