Abstract The friction force on a circular object rolling without sliding down an inclined plane is due to static friction. If the commences in mode at top of incline, and if incline angle small, then small additional arises reduce speed contact point zero sufficiently long. While sliding, total equal plus force. effect described theoretically supported by measurements linear angular velocities ...

Liquid water is pushed through flow channels of fuel cells, where one surface is a porous carbon electrode made up of carbon fibers. Water drops grow on the fibrous carbon surface in the gas flow channel. The drops adhere to the superficial fiber surfaces but exhibit little penetration into the voids between the fibers. The fibrous surfaces are hydrophobic, but there is a substantial threshold ...

In this study, conditions that enable a prosthetic knee flexion strategy in transfemoral amputee subjects during obstacle avoidance were investigated. This study explored the hip torque principle and the static ground principle as object avoidance strategies. A prosthetic limb simulator device was used to study the influence of applied hip torques and static ground friction on the prosthetic fo...