Implantable micropump systems capable of user-controlled and site-specific chronic drug delivery in small animals are a critical unmet need in drug discovery and development. Our electrochemical bellows actuator provides current-controlled flow rate and is integrated to form a fully implantable system with a refillable reservoir and one-way valve that prevents mixing of biological fluids with t...

An electron beam with a small energy spread (0.1%) and a small normalized emittance (2 mm.mrad) is required to drive a Free Electron Laser at the TESLA Test Facility (TTF) at DESY. During FEL operations, the longitudinal and transverse wakefields which are generated by vacuum components, principally by RF cavities, bellows and valves, will induce an additional energy spread and emittance growth...

The threat of premature death in the fourth or fifth decades of life from cardiorespiratory failure in kyphoscoliosis is well known. Ten patients with severe kyphoscoliosis (curves greater than 100 degrees), who had survived into their seventh decade free of cardiorespiratory failure, were encountered over a four-year period. Pulmonary function studies on five patients showed impaired chest bel...

To explore the mechanical properties of braided corrugated hose, space curve parametric equation tube is deduced, specific to structural features tube. On this basis, equivalent model proposed based on same axial stiffness in order improve calculational efficiency. The geometric and Finite Element Model DN25 hose established. numerical simulation results are analyzed, distribution stress fricti...