In modern industry, the issue of improving reliability a particular mechanism is relevant, especially when work takes place in an aggressive environment. Oil and gas companies are interested than anyone else solving these problems. This article will give example one problems this improvement design distributor mechanical waveguide. Such devices used to generate deformation wave flexible element...

Knowledge of local bone quality is essential for surgeons to determine operation techniques. A device for intraoperative measurement of local bone quality has been developed by the AO-Research Foundation (Densi - Probe®). We used this device to experimentally measure peak breakaway torque of trabecular bone in the proximal femur and correlated this with local bone mineral density (BMD) and fail...

OBJECTIVE Aseptic loosening of artificial knee joints induced by wear particles from a tibial polyethylene (PE) insert is a serious problem limiting their longevity. This study investigated the effects of grafting with our original biocompatible phospholipid polymer 2-methacryloyloxyethyl phosphorylcholine (MPC) on the insert surface. METHODS The hydrophilicity of the PE surface was determine...

The origins of impaired finger and hand function were examined in 10 stroke survivors with chronic spastic hemiparesis, with the intent of assessing whether mechanical restraint or altered neurophysiological control mechanisms are responsible for the well-known impairment of finger extension. Simultaneous extension of all four metacarpophalangeal (MCP) joints of the impaired hand was either ext...

We discuss recent highlights from research at Cornell University, Ithaca, New York, regarding the use of spin-transfer torques to control magnetic moments in nanoscale ferromagnetic devices. We highlight progress on reducing the critical currents necessary to produce spin-torque-driven magnetic switching, quantitative measurements of the magnitude and direction of the spin torque in magnetic tu...

Haptic interface serves as an ideal context and platform for teaching both system dynamics and embedded control. At The University of Michigan, a traditional undergraduate mechanical engineering course in systems dynamics and a new undergraduate electrical engineering course in embedded control systems have been equipped with instructional modules based on two new single-axis haptic interface d...

Transparent conductors (TCs) have a variety of properties that can limit their performance in various applications. These properties include their optical and electronic behavior: optical transparency, electrical conductivity, plasma wavelength, ultraviolet absorption edge, work function, conductivity type; factors affecting device fabrication: synthesis temperature, thermal stability, resistan...