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In recent years a number of conditions has been established that a monoid must necessarily satisfy if it is to have a presentation through some nite convergent string-rewriting system. Here we give a survey on this development, explaining these necessary conditions in detail and describing the relationships between them.
We evaluated brain activity using 64-channel visual evoked potentials (VEPs) while subjects perceived apparent motion in depth. Checkerboard patterns (CBPs) within small and large circles were presented in turn as experimental conditions. Motion in depth was perceived when the CBP in the large circle was coarser than in the small circle; when coarseness did(More)
This study aimed to examine the bilateral differences in movement and joint torques during the squat exercise by using kinematic and kinetic analyses. Eighteen long jumpers participated in this study. They performed 3 repetitions of the squat exercise with loads of 50, 70, and 90% of their 3 repetition maximum (3RM). During the exercise, their movement was(More)
Motion aftereffect (MAE) is a type of motion illusion. After visual focusing on an object moving in one direction, an illusory perception of motion in the opposite direction occurs while the object suddenly stops moving. In this study we explored components and distribution of evoked potentials related to this motion illusion using MAE caused by motion of(More)