Abstract: A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

Abstract: A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

Abstract: A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

Abstract: A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

Abstract: A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

Abstract: Method and structure for nitride-based laser diode arrays on a conducting substrate are disclosed. Air-bridge structures are used to make compact laser diode arrays suitable for printer applications. The use of a channel structure architecture allows the making of surface emitting laser diode arrays.

Abstract: A method and structure for nitride based laser diode arrays on an insulating substrate is described. Various contact layouts are used to reduce electrical and thermal crosstalk between laser diodes in the array. A channel structure is used to make a surface emitting laser diode while maintaining a simple contact structure. Buried layers are used to provide a compact and low crosstalk contact structure for the laser diode array.

Abstract: A technique based on etching a release layer, for separating the nearly lattice matched substrate from a base substrate is disclosed. A nearly lattice matched substrate for the epitaxial growth of Group-III nitride semiconductor devices and method of fabricating the nearly lattice matched substrate and devices is disclosed. Enhanced ELOG methods are used to create low defect density GaN films. The GaN films are used to grow Group-III nitride LEDs and laser diodes.

Abstract: A process for etching III-V nitride and III-V nitride alloy materials first implants selected regions of the materials with ions and then selectively etches the implanted regions in an etching liquid, such as an aqueous base. The etch depth is controlled by the energy, mass and dose of the implanted ions.

Abstract: A method and apparatus for overpressure protection of a catheter from an indwelling catheter. A method in one embodiment includes injecting an agent into the catheter and relieving overpressures in the catheter during the injecting step. The agent is typically a declotting agent and the obstruction is typically a clot (e.g., blood clot). In one embodiment of the apparatus, a catheter includes a cannula and a first hub and a second hub, each of which are coupled to the cannula. The first hub is for receiving an agent which is placed into the cannula to remove an obstruction, and the second hub includes an overpressure relief valve for relieving an overpressure condition in the cannula. Other embodiments of the invention are also described.

Abstract: A method for fabricating a multiple layer semiconductor device, such as a laser, using impurity-induced, or vacancy-enhanced, intermixing of semiconductor layers to selectively inactivate quantum well regions in the device.

Abstract: A fabrication process and several structures for an index-guided laser diode formed by IILD or for a multiple wavelength laser array containing stacked semi-conductive active layers with quantum wells. The laser wavelength is varied laterally by effectively inactivating quantum wells which have transition wavelengths longer than that desired in the selected portion of the device. The quantum wells are inactivated by intermixing them with the surrounding high band gap semiconductor layers. To accomplish this intermixing without affecting the active layer in nearby regions, a finite source of impurity inducing or promoting intermixing is located in proximity to the quantum well to be intermixed, and the sample is annealed under conditions which allow for lateral patterning of the impurity-induced intermixing.

Abstract: A device for patching chemical tanks or tank cars comprised of a housing, at least a pair of electromagnets, and a seal which is secured to a pressure system which is secured to the housing, wherein the pressure system permits the seal to be extended from the housing against the surface of a tank or tank car.

Abstract: The method of the present invention comprises displaying an image comprising reflected pulsed doppler signals in real time produced by reflecting a reference pulsed doppler signal, each reflected signal displayed in a color defined by a polar coordinate plot, wherein the polar coordinate plot comprises an origin representing reflected signals of the reference pulsed doppler signal having zero amplitude and zero frequency. The polar coordinate plot further comprises an axis representing reflected signals of the reference pulsed doppler signal having zero frequency, a radius with respect to the origin representing amplitude information of reflected signals of the reference pulsed doppler signal, an angle with respect to the axis representing the frequency of reflected signals of the reference pulsed doppler signal, and a vector displaced 180 degrees from the axis, the vector representing a Nyquist limit of the reference pulsed doppler signal.