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A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
A pawl is used in an anchor windlass to prevent a free-spooling chain by grabbing and snubbing an individual link. Similar mechanisms include a Devil's claw, or a claw and dog. Ratchet A pawl is used in combination with a ratchet gear in socket wrenches, bicycle freehubs, winches, ratchet reels for diving, fishing, and many other applications ...
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Inclusion has different historical roots/background which may be integration of students with severe disabilities in the US (who may previously been excluded from schools or even lived in institutions) [7] [8] [9] or an inclusion model from Canada and the US (e.g., Syracuse University, New York) which is very popular with inclusion teachers who believe in participatory learning, cooperative ...
In other words, assistive technology is any object or system that helps people with disabilities, while adaptive technology is specifically designed for disabled people. [7] Consequently, adaptive technology is a subset of assistive technology. Adaptive technology often refers specifically to electronic and information technology access. [8]
A ratchet or rattle, more specifically, cog rattle [1] is a musical instrument of the percussion family and a warning/signaling device. It operates on the principle of the ratchet device , using a gearwheel and a stiff board mounted on a handle, which rotates freely.
Schematic figure of a Brownian ratchet. In the philosophy of thermal and statistical physics, the Brownian ratchet or Feynman–Smoluchowski ratchet is an apparent perpetual motion machine of the second kind (converting thermal energy into mechanical work), first analysed in 1912 as a thought experiment by Polish physicist Marian Smoluchowski. [1]
Adapted physical education is the art and science of developing, implementing, and monitoring a carefully designed physical education. Instructional program for a learner with a disability, based on a comprehensive assessment, to give the learner the skills necessary for a lifetime of rich leisure, recreation, and sport experiences to enhance physical fitness and wellness.