Results 91 to 100 of about 38,112 (227)

Advances in Triboelectric Nanogenerators With Rotating Structure

Carbon Energy, EarlyView.
The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang, Chunxu Xue, Yutong Chen, Yujie Qiang, Seeram Ramakrishna   +4 more
wiley   +1 more source

Mach's principle: Exact frame-dragging via gravitomagnetism in perturbed Friedmann-Robertson-Walker universes with $K = (\pm 1, 0)$

, 2009
We show that the dragging of the axis directions of local inertial frames by a weighted average of the energy currents in the universe is exact for all linear perturbations of any Friedmann-Robertson-Walker (FRW) universe with K = (+1, -1, 0) and of ...
A. Lichnerowicz, A. R. Edmonds, C. W. Misner, Christoph Schmid, D. Lynden-Bell, D. Lynden-Bell, E. Mach, E. Mach, E. Mach, G. de Rham, G. de Rham, G. de Rham, H. Thirring, H. Thirring, H. Thirring, I. Ciufolini, J. Jost, J. D. Jackson, J. D. Jackson, M. Berger, M. E. Rose, O. Heaviside, R. Durrer, R. Weitzenböck, S. Weinberg, T. Frankel, T. J. McCormack   +26 more
core   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

A Large‐Area, Stretchable Accelerometer Array for Spatial Assessment of Chest Compressions in Cardiopulmonary Resuscitation

FlexTech, EarlyView.
A large‐area stretchable accelerometer array enables multi‐point monitoring of chest compression depth and thoracic contour reconstruction during CPR, offering high spatiotemporal resolution for dynamic deformation tracking and providing a new pathway toward intelligent, feedback‐based resuscitation systems. ABSTRACT High‐quality chest compressions are
Tianrun Xu, Jin Ji, Chongyuan Huang, Yiming Chen, Peng Zhao, Jizhou Song   +5 more
wiley   +1 more source

Assessing the impact of body location on the accuracy of detecting daily activities with accelerometer data

iScience
Summary: Recent advancements in digital biomarkers have highlighted the importance of accelerometer and gyroscope data for monitoring activities, identifying motion-related diseases, and assessing disease severity.
Xiangnan Dang, Wentao Li, Jasmine Zou, Brian Cong, Yuanfang Guan   +4 more
doaj   +1 more source

Flexible ionic pressure sensors: From migration‐electronic mechanisms to emerging iontronic paradigms

InfoMat, EarlyView.
Mechanisms, materials, structures, and applications of the FIPSs. Abstract Flexible ionic pressure sensors (FIPS) have emerged as promising candidates for bridging the gap between electronics and biologically compatible interfaces. Unlike previous reviews, which focused primarily on materials or devices, this review presents a classification of FIPS ...
Mengjie Wang, Yanan Ma, Jia Liu, Li Xu, Li Wen, Ranyun Wu, Yongfa Cheng, Liang Li, Siliang Wang, Yang Yue, Zhixiang Huang   +10 more
wiley   +1 more source

Gyroscope sensor data of shank motion during normal and barefoot walking

Data in Brief
In recent years, shank angular velocity (SAV) has emerged as a valuable tool for accurate temporal gait analysis and motion pattern assessment. To explore SAV among healthy subjects and its capability to distinguish differences between walking conditions,
Mikko Salminen, Saku Suominen, Akihiro Inomata, Shinji Hotta, Yuki Sasamoto, Lea Saarni, Antti Vehkaoja   +6 more
doaj   +1 more source

On the Motion of a Gyroscope in an External Gravitational Field [PDF]

Progress of Theoretical Physics, 1973
The equation of rotational motion of a gyroscope in a given gravitational field is obtained from a kinematical consideration combined with the equivalence principle. The Lagrangian is constructed which leads to this equation and also to the equation of its orbital motion. The.
openaire   +1 more source

Faraday–Ramsey Rotation in Ultrathin Alkali Vapor Cells as an Analogy to Atomic‐Beam Systems

Laser &Photonics Reviews, EarlyView.
This work demonstrates that ultrathin rubidium vapor cells can emulate atomic‐beam behavior through geometry‐dependent velocity filtering. Employing a spatially separated pump–probe scheme and Faraday–Ramsey rotation, the study reveals coherent atomic dynamics without buffer gas or anti‐relaxation coatings. This approach offers a compact pathway toward
Mark Dikopoltsev, Eliran Talker, Yefim Barash, Noa Mazurski, Uriel Levy   +4 more
wiley   +1 more source

A Smart Device Enabled System for Autonomous Fall Detection and Alert

International Journal of Distributed Sensor Networks, 2016
The activity model based on 3D acceleration and gyroscope is created in this paper, and the difference between the activities of daily living (ADLs) and falls is analyzed at first.
Jian He, Chen Hu, Xiaoyi Wang
doaj   +1 more source