There is strong experimental evidence for the existence of strange modes of failure of MEMS devices under shock. Such failures have not been explained with conventional models of MEMS. These failures are characterized by overlaps between moving microstructures and stationary electrodes, which cause electrical shorts. This work presents a model and simulation of MEMS devices under the combinatio...

background: tibial avulsion fractures of the posterior cruciate ligament are not infrequent. however, controversies exist between the fixation of the fragments and their reconstruction in the cases with small bony fragments. this prospective study was undertaken to study the results after fixation of the fragments by the malleolar screw and the pull through suture techniques.   methods: from ju...

An accurate frequency of the Helmholtz–Duffing oscillator is obtained by a sophisticated modification He’s formulation. The pull-down instability existing in symmetric breaking phenomenon newly discovered dynamic motion for oscillators with even nonlinearities. A criterion predicting asymmetrical amplitude and built measuring change. good matching performance between analytic results numerical ...

purpose ankle sprain is one of the most common injuries among athletes and instability and injury to this joint is responsible for long time loss of physical and recreational activity. also, it can impose high costs to sport teams. prevention of this injury is an important concern of practice and rehabilitation. one way of reducing the possibility of ankle joint injury is using an ankle orthosi...

This paper presents results about fabrication and operation of electrostatic actuators in liquids with various permittivities. In the static mode, we provide experimental and theoretical demonstration that the pull-in effect can be shifted beyond one third of the initial gap and even be eliminated when electrostatic actuators are operated in liquids. This should benefit to applications in micro...

There is strong experimental evidence for the existence of strange modes of failure of microelectromechanical systems (MEMS) devices under mechanical shock and impact. Such failures have not been explained with conventional models of MEMS. These failures are characterized by overlaps between moving microstructures and stationary electrodes, which cause electrical shorts. This work presents mode...