Results 51 to 60 of about 5,901 (289)
Unexpected proof of the diurnal nutation [PDF]
, 1890 The proof of the diurnal nutation is confirmed by a new determination: the Strasbourg meridian circle azimuth variations.La preuve de la nutation diurne est confirmée par une nouvelle détermination: les variations de l’azimut du cercle méridien de ...
Folie, François
core +1 more source
Research on Variable Baseline Coherent Angle Measurement Based on Nutation Scanning
PhotonicsIn inter-satellite laser communication systems, angular deviations between the boresights of terminals exert an impact on system performance, thereby imposing higher requirements on performance parameters such as the angle measurement accuracy and range ...
Dixiang Zeng +6 more
doaj +1 more source
Aviation, 2021 In this paper, the dynamic stability analysis of a rolling airframe actuated by one pair ON-OFF actuator using linear theory is presented via developing a new closed form solution. The effect of discontinuous forcing term on rolling airframe stability is
Jalal Karimi
doaj +1 more source
Advanced Robotics Research, EarlyView.An enhanced universal gripper combining rigid mechanics with self‐adaptable fingers is presented for industrial automation. The novel six‐bar linkage with integrated compliant pad eliminates mechanical interference while enabling passive shape adaptation.
Muhammad Usman Khalid +7 more
wiley +1 more source
Chandler Wobble and Free Core Nutation: Theory and Features
Journal of Astronomy and Space Sciences, 2019 Being a torque free motion of the rotating Earth, Chandler wobble is the major component in the Earth’s polar motion with amplitude about 0.05-0.2 arcsec and period about 430-435 days.
Sungho Na, Kyoung-Min Roh, Jungho Cho
doaj +1 more source
FiN‐Kiri: Fabric‐Based Inflatable Kirigami Actuator for Multimodal Soft Robots
Advanced Robotics Research, EarlyView.This study introduces a type of inflatable fabric‐based kirigami actuator capable of performing bending motion. The actuator is utilized as soft grippers, a crawling robot and a swimming robot. The crawling robot demonstrated extraordinary motion capabilities, such as moving forward, turning and navigating a narrow tunnel.
Yang Yu +12 more
wiley +1 more source
Practical demonstration of the diurnal nutation existence [PDF]
, 1886 Introduction of a François Folie’s note about the existence of diurnal nutation of the world’s axis. Nutation that can be sensitive if the globe consists of a fluid core and a solid crust.Présentation d’une note de François Folie sur l’existence de la ...
Folie, François
core
Understanding the effects of the core on the nutation of the Earth
Geodesy and Geodynamics, 2017 In this review paper, we examine the changes in the Earth orientation in space and focus on the nutation (shorter-term periodic variations), which is superimposed on precession (long-term trend on a timescale of years).
Véronique Dehant +7 more
doaj +1 more source
Flexible Sensors for Robotics Tactile Perception: A Review
Advanced Robotics Research, EarlyView.Flexible tactile sensing for robotics is reviewed through four interconnected dimensions. Physical mechanisms include piezoresistive, capacitive, piezoelectric, triboelectric, iontronic, and optical sensing. Structural design includes bioinspired, defect‐based, and MEMS‐based tactile systems.
Yu Song, Ying Chen, Yihao Chen, Xue Feng
wiley +1 more source
The Earth's nutation: VLBI versus IAU 2000A
, 2013 International audienceThe nutation measured by VLBI is compared with the IAU 2000A model. The differences are modeled empirically by adjusting the free core nutation and a number of tidal terms.
Capitaine, Nicole +3 more
core +4 more sources