منابع مشابه
Ocular injuries from liquid golf ball cores.
Tissue removed from nine new cases from 18 hours to 20 weeks after injury by a golf ball contained crystalline and other foreign material to which there was a mild inflammatory reaction followed by macrophagic activity and fibrosis. Optical and electron probe analysis showed that the crystalline material was crushed barytes containing small quantities of muscovite as is typical in natural depos...
متن کاملGolf Driver/ball Impact Acoustic Measurement System
This experiment assessed whether or not a golf club impact acoustic testing methodology using a fixed golf club/launched golf ball setup would record less error in the captured acoustic signatures than industry standard methodologies (a stationary ball/swinging club setup). Two steel-shafted golf drivers were tested using this new system that launched golf balls using a pressurized air cannon i...
متن کاملThe flight of a golf ball
A skilled golfer hitting a drive can accelerate his club head from zero to 120 miles per hour in the quarter of a second before making contact with the ball. As a result, the ball leaves the tee with a typical speed of 175 miles per hour and at an angle of 11◦ to the ground. From that moment the golfer no longer exercises control. The trajectory of the ball is determined by the laws of physics....
متن کاملAutomatic Golf Ball Trajectory Reconstruction and Visualization
The article presents the steps required to reconstruct a 3D trajectory of a golf ball flight, bounces and roll in short game. Two video cameras were used to capture the last parts of the trajectories including the bounces and roll. Each video sequence is processed and the ball is detected and tracked until is stops. Detected positions from both video sequences are then matched and 3D trajectory...
متن کاملRealistic Simulation of Golf Ball Impact
This paper presents an Abaqus/Explicit simulation of the impact event when a golf club hits a golf ball. This is a challenging subject for finite element simulations because of it is characterized by high strain rate behavior. The simulation emphasizes accurate material characterization and realistic model construction. Specifically, an advanced nonlinear viscoelastic material model from Veryst...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 2000
ISSN: 0022-3050
DOI: 10.1136/jnnp.68.2.251