In our currently ageing society, fall prevention is important for better healthy life expectancy and sustainable healthcare systems. While active outdoor walking recommended as adequate exercise the senior population, falls due to tripping slipping exist primary causes of severe injuries. Minimum foot clearance (MFC) lowest vertical height during mid-swing phase indicates risk tripping. contras...

In every state, when an adult has a diminished capacity to make decisions about personal affairs or property management, a court may transfer the individual’s right to make decisions to a guardian. This Article argues that, in most cases, it would be preferable to support decision making rather than supplant it through guardianship, and then seeks to locate a right to receive such support as a ...

Assistant Professor, Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, N.Y. 14850 The shear resistance of slipping surfaces at fixed normal stress is given by r = r( v,state). Here V = slip velocity, dependence on «state" is equivalent to functional dependence with fading memory on prior V(t), and ar( v,state) /iJV>O. We establish linear stability conditions for stead...

Force and torque induced by traveling motion of a mobile robot effect dynamically to the objects being carried on it. If the induced force and torque should be bigger than the static friction force and torque exerting between the carrying objects and the mobile robot, the carrying objects start to slip. Since this slipping motion causes increasing the acceleration of the mobile robot, then the ...

According to the Principle of Conditional Non-Contradiction (CNC), conditionals of the form “If p, q” and “If p, not q” cannot both be true, unless p is inconsistent. This principle is widely regarded as an adequacy constraint on any semantics that attributes truth conditions to conditionals. Gibbard has presented an example of a pair of conditionals that, in the context he describes, appear to...

Slipping and Tripping Re exes for Bipedal Robots Gary N. Boone and Jessica K. Hodgins Abstract|Many robot applications require legged robots to traverse rough or unmodeled terrain. This paper explores strategies that would enable legged robots to respond to two common types of surface contact error: slipping and tripping. Because of the rapid response required and the di culty of sensing uneven...

Many vehicle systems contain rolling elements which exhibit unstable rolling motion, called shimmying, which may lead to disastrous results. The classical shimmying wheel is a simple model which captures the essential dynamics of such systems. Fortunately, this model possesses a particular geometric structure which provides a simple means to design a globally stabilizing controller. However, th...