Results 81 to 90 of about 38,112 (227)

Spacetime dynamics of spinning particles - exact electromagnetic analogies

, 2016
We compare the rigorous equations describing the motion of spinning test particles in gravitational and electromagnetic fields, and show that if the Mathisson-Pirani spin condition holds then exact gravito-electromagnetic analogies emerge.
A. Barnes, C. Møller, C. Møller, C. Will, C. W. Misner, D. J. Griffiths, E. Poisson, F. A. E. Pirani, H. Stephani, H. C. Corben, Hans C. Ohanian, I. Ciufolini, I. B. Khriplovich, J. Madore, J. Weyssenhoff, J. D. Jackson, José Natário, K. S. Thorne, Kip S. Thorne, L. Bel, L. Bel, L. Bel, L. Filipe O. Costa, L. Landau, L. F. Costa, M. Mathisson, M. Mathisson, M. L. Ruggiero, Miguel Zilhão, R. Plyatsko, R. F. O’Connell, Robert M. Wald, W. Tulczyjew   +32 more
core   +1 more source

Myoelectric Origami‐Based Soft Robotic Knee Exoskeleton to Enhance Sit‐to‐Stand Assistance in Elderly Populations

Advanced Intelligent Systems, EarlyView.
This work presents a lightweight Miura‐origami soft knee exoskeleton powered by vacuum actuation and integrated with a multimodal physiological intent‐recognition system, providing real‐time assistance during sit‐to‐stand movement to reduce muscle effort and improve user comfort.
Yuchuan Jia, Xingjian Ye, Xuanyi Zhou, Yong Ling, Daniela Rus, Chen‐Hua Yeow   +5 more
wiley   +1 more source

Signal Quality Improvement Algorithms for MEMS Gyroscope-Based Human Motion Analysis Systems: A Systematic Review

Sensors, 2018
Motion sensors such as MEMS gyroscopes and accelerometers are characterized by a small size, light weight, high sensitivity, and low cost. They are used in an increasing number of applications. However, they are easily influenced by environmental effects
Jiaying Du, Christer Gerdtman, Maria Lindén   +2 more
doaj   +1 more source

Voxel‐SLAM: A Complete, Accurate, and Versatile Light Detection and Ranging‐Inertial Simultaneous Localization and Mapping System

Advanced Intelligent Systems, EarlyView.
: In this work, Voxel‐SLAM (simultaneous localization and mapping) is introduced: a complete, accurate, and versatile LiDAR (light detection and ranging) ‐inertial SLAM system consisting of five modules: initialization, odometry, local mapping (LM), loop closure (LC), and global mapping (GM), all employing the same map representation, an adaptive voxel
Zheng Liu, Haotian Li, Chongjian Yuan, Xiyuan Liu, Jiarong Lin, Rundong Li, Chunran Zheng, Bingyang Zhou, Wenyi Liu, Fu Zhang   +9 more
wiley   +1 more source

New Upper Limit of Terrestrial Equivalence Principle Test for Rotating Extended Bodies

, 2003
Improved terrestrial experiment to test the equivalence principle for rotating extended bodies is presented, and a new upper limit for the violation of the equivalence principle is obtained at the level of 1.6$% \times 10^{\text{-7}}$, which is limited ...
A. Cavalleri, A.M. Nobili, A.N. Youdin, B. Mashhoon, B. Mashhoon, B. Mashhoon, B. Mashhoon, B. Mashhoon, B. Mashhoon, B. Mashhoon, B. Mashhoon, B.M. Barker, C.G. de Oliveira, C.J. Berglund, D.J. Wineland, F. Sorge, I. Yu Kobzarev, J. Luo, J. Luo, J.O. Dickey, K. Kuroda, K.D. Krori, L. Herrera, L.H. Ryder, L.S. Hou, M. Cerdonio, P. Touboul, P.G. Roll, Q. Yan, R.C. Ritter, R.V. Eötvös, S. Baessler, S. Buchman, S. Buchman, S. Carusotto, S.A. Werner, T.L. Gustavson, T.M. Niebauer, T.M. Niebauer, V. Josselin, V.B. Braginsky, W.D. Ni, Y. Su, Y. X. Nie, Y. Z. Zhang, Y.Z. Zhang, Z. B. Zhou, Z. G. Wu, Z.B. Zhou   +48 more
core   +1 more source

Turning Slowly Predicts Future Diagnosis of Parkinson's Disease: A Decade‐Long Longitudinal Analysis

Annals of Neurology, EarlyView.
Objective Wearable technology allows accurate measurement of turning while walking, with cross‐sectional studies indicating that difficulty turning presents even in preclinical phases of Parkinson's disease. The aim of our study was to quantify rate of change of turning performance in a cohort of older adults, and test whether turning decline can ...
Morad Elshehabi, Clint Hansen, Markus A. Hobert, Anna‐Katharina von Thaler, Kathrin Brockmann, Bhargav Tallapragada, Florian Metzger, Daniela Berg, Walter Maetzler, Brook Galna   +9 more
wiley   +1 more source

Physics of gyroscope nutation

AIP Advances, 2019
The known publications of the gyroscope property of maintaining its axis are represented by simplified mathematical models formulated on the law of kinetic energy conservation and the action of an inertial torque expressed by the change in the angular ...
R. Usubamatov
doaj   +1 more source

Functional models from limited data: A parametric and multimodal approach to anatomy and 3D kinematics of feeding in basking sharks (Cetorhinus maximus)

The Anatomical Record, EarlyView.
Abstract Basking sharks, Cetorhinus maximus (Gunnerus, Brugden [Squalus maximus], Det Kongelige Norske Videnskabers Selskabs Skrifter, 1765, vol. 3, pp. 33–49), feed by gaping their mouths and gill slits, greatly reorienting their cranial skeletons to filter food from water.
Tairan Li, Mike Schindler, Martha Paskin, Venkata A. Surapaneni, Elliott Scott, Sabine Hauert, Nicholas Payne, David E. Cade, Jeremy A. Goldbogen, Frederik H. Mollen, Daniel Baum, Sean Hanna, Mason N. Dean   +12 more
wiley   +1 more source

Dynamic Characteristics of Vertically Coupled Structures and the Design of a Decoupled Micro Gyroscope

Sensors, 2008
In a vertical type, vibratory gyroscope, the coupled motion between reference (driving) and sensing vibrations causes the zero-point output, which is the unwanted sensing vibration without angular velocity.
Seog Soon Baek, Taekhyun Kim, Seung-Yop Lee, Bumkyoo Choi   +3 more
doaj  

Dynamics of a yoyo using a smartphone gyroscope sensor

, 2019
The dynamics of a traditional toy, the yoyo, is investigated theoretically and experimentally using smartphone' sensors. In particular, using the gyroscope the angular velocity is measured.
Marti, Arturo C., Monsoriu, Juan A., Monteiro, Martin, Salinas, Isabel   +3 more
core   +1 more source