Results 1 to 10 of about 154,857 (301)
Pitch Invariance Reveals Skill-Specific Coordination in Human Movement: A Screw-Theoretic Reanalysis of Golf Swing Dynamics [PDF]
Journal of Functional Morphology and KinesiologyBackground: Skilled human movement, such as the golf swing, emerges from coordinated rotational and translational dynamics. This study investigates pitch—a screw-theoretic invariant defined as the ratio of linear to angular velocity along the ...
Wangdo Kim
doaj +2 more sources
Calculation Method of Bearing Capacity of Screw Pile Based on Unified Strength Theory
Shanghai Jiaotong Daxue xuebao, 2022 Based on the unified strength theory and the Terzaghi limit equilibrium theory, the ultimate bearing capacity of screw pile has been deduced. The method to determine the critical pitch and calculate the ultimate bearing capacity of the screw pile in two ...
MA Jiakuan, LUO Lijuan, REN Xiang, SHI Hang, YIN Yimo
doaj +1 more source
Novel Reconfigurable Spherical Parallel Mechanisms with a Circular Rail
Robotics, 2022 The COVID-19 pandemic has placed unprecedented stress on the world healthcare system and demonstrated the need for modern automated robotic solutions for numerous medical applications.
Pavel Laryushkin +3 more
doaj +1 more source
IEEE Access, 2023 The closed-form solution of each rotation joint angle is the most direct and convenient method for humanoid robot arms to imitate the real-time motion of the human arm.
Feifei Zhong +5 more
doaj +1 more source
The melting performance of single screw extruders. II [PDF]
, 1981 In the previous paper (1) the melting performance of a number of recent screw designs was analyzed, using a rather simple theory. A new screw design was proposed.
Dekker +8 more
core +9 more sources
Micromachines, 2022 The Ilizarov external fixator plays an important role in the correction of complex malformed limbs. Our purpose in this work was to reveal the transmission of adjustable forces between the external fixator and the broken bone, and express the stress ...
Peng Su +4 more
doaj +1 more source
Simplified theory of Archimedean screws [PDF]
Journal of Hydraulic Research, 2009 The Archimedean screw pump is one of the oldest hydraulic machines. Today, it is employed in pumping as well as - operating in reverse - in an energy conversion role. Despite its age, no consistent theory links the screw's geometry with its mechanical efficiency. Based on geometrical parameters and an idealised energy conversion process for one turn of
Muller, Gerald, Senior, James
openaire +1 more source
Robotics, 2021 This paper presents a screw theory approach for the computation of the instantaneous rotation centers of indeterminate planar linkages. Since the end of the 19th century, the determination of the instantaneous rotation, or velocity centers of planar ...
Juan Ignacio Valderrama-Rodríguez +3 more
doaj +1 more source
Machines, 2023 In the present day, unmanned aerial vehicle (UAV) technology is being used for a multitude of inspection operations, including those in offshore structures such as wind-farms.
Pedro Pereira +2 more
doaj +1 more source
Dynamic Interaction of a Heavy Crane and a Ship in Wave Motion [PDF]
Modeling, Identification and Control, 2018 Previous work on the dynamics of vehicle-manipulator systems is extended to offshore ships with heavy cranes. The proposed method is based on a Newton-Euler formulation where the forces of constraint are eliminated using projection matrices based on the ...
Geir Ole Tysse, Olav Egeland
doaj +1 more source