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There are many designs for the leg mechanisms of walking machines that provide foot trajectories with different properties. Walking vehicles are classified according to the number of legs. Common configurations are one leg (pogo stick, monopod, unipod, or "hopper"), two legs ( biped or bipod), four legs ( quadruped ), and six legs ( hexapod ).
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They benefit from increased stability over bipedal robots, especially during movement. At slow speeds, a quadrupedal robot may move only one leg at a time, ensuring a stable tripod. Four-legged robots also benefit from a lower center of gravity than two-legged systems. [1] Four legged robots include:
Extended Reach Drilling (ERD) is directional drilling of very long non-vertical wells. The aims of ERD are: a) to reach a larger area from one surface drilling location, and b) to keep a well in a reservoir for a longer distance in order to maximize its productivity and drainage capability.
Natural navigation employing the ODT has two fundamental, parallel paths. One path seeks to create wholly immersive, obstruction free environments as in virtual reality, while the other seeks a lower cost, more restricted device. The immersive vision is that of a large active surface upon which the user is able to walk freely and unfettered.
Unilateral training involves the performance of physical exercises using one limb instead of two. Such exercises should be considered as being distinct from bilateral, two limbed, exercises. For example, unilateral squats use one leg, and bilateral squats use two legs. A unilateral bench press uses one arm and a bilateral bench press two arms.
As they reach their maximum velocity, the torso straightens out into an upright position. The goal of sprinting is to reach and maintain high top speeds to cover a set distance in the shortest possible time. A lot of research has been invested in quantifying the biological factors and mathematics that govern sprinting.
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