摘要:
A method and apparatus for injecting saline into an open cavity of a patient's body, and, alternatively, vacuuming fluids from said cavity, during laparoscopic surgery that provides constant feed and amplified pressure to provide a steady fluid output, in a disposable, single use handheld surgical device.
摘要:
A switchable inductor-capacitor-inductor (L-C-L) network, which includes an integrated T/R switch, can advantageously bridge a PA and an LNA of a wireless device. The first inductor can function as an RF choke that provides power to the PA. In one embodiment, the first inductor can be advantageously implemented using the bond wires already attached to the PA, thereby requiring no additional inductors to provide the integrated T/R switch and minimizing use of valuable silicon area. The second inductor can function as a source inductor for and cancel an input parasitic capacitance of the LNA. A set of capacitors can act as blocking capacitors to provide DC isolation between the LNA and the PA, thereby protecting the LNA from high voltages. The L-C-L network can also advantageously function as an impedance matching network for at least one of the PA and the LNA.
摘要:
A streamlined method for purifying alpha-1-antitrypsin (AAT) from an AAT-containing protein mixture, such as a Cohn fraction IV precipitate, is provided. In the method of the invention, contaminating proteins are destabilized by cleavage of disulfide bonds with a reducing reagent, such as a dithiol, which does not affect AAT. The destabilized proteins are then preferentially adsorbed on a solid protein-adsorbing material, without the addition of a salt as a precipitant. Separation of the solid adsorbent from the solution leaves a purified AAT solution that is directly suitable for chromatographic purification, without the need for extensive desalting as in prior art processes. A process incorporating this method, which provides pharmaceutical grade AAT in high yield on a commercial scale, is also described.
摘要:
An improved kayak provides a rigid open cockpit hull with air chambers attached to the hull. The air chambers provide a generally convex shape for increased maneuverability and also provide cushioning against impact to reduce the risk of injury to the kayak pilot. The air chambers allow for an open cockpit kayak with an exterior surface having a similar shape as a conventional closed cockpit kayak, providing a similar level of maneuverability and allowing for completion of maneuvers such as rolling the kayak from an inverted position in the water.
摘要:
A method for controlling a vehicle wheel brake that includes applying a pulse width modulated voltage to an isolation valve located between a master brake cylinder and the wheel brake to develop a differential pressure across the isolation valve that is applied to the wheel brake. The differential pressure is a function of the duty cycle of the applied voltage. Because the operation of the isolation valve allows a flow of fluid through the valve, changes in the master cylinder pressure are passed through the isolation valve to the wheel brake.
摘要:
An improved kayak provides a rigid open cockpit hull with air chambers attached to the hull. The air chambers provide a generally convex shape for increased maneuverability and also provide cushioning against impact to reduce the risk of injury to the kayak pilot. The air chambers allow for an open cockpit kayak with an exterior surface having a similar shape as a conventional closed cockpit kayak, providing a similar level of maneuverability and allowing for completion of maneuvers such as rolling the kayak from an inverted position in the water.
摘要:
Methods for treating and preventing retinopathic conditions by administering a glucocorticoid to the vitreous chamber of a patient at risk of, or suffering from, the retinopathy.
摘要:
Beta and alpha-ray particles emitted by radio-isotopic by-products of nuclear fission, such as nickel 63, are used as a power source at the cathode of a microwave generating magnetron. Such particles include high speed, high energy electrons having a large EMF associated therewith. In the magnetron, a radial electrical vector, between the cathode and anode, interacts with an axial magnetic vector to produce a cloud of electrons that rotates about the magnetron axis. The speed, geometry and density of the rotating cloud may be modulated by an external RF input or grids within the interaction space of the magnetron. At the periphery of the interaction space is a polar array of anode cavities into which the rotating field induces an LC equivalent parameter that includes high energy microwaves that may be used as an input for the generation of AC or DC power.
摘要:
An apparatus and methods for delivering ocular implants or microimplants. The apparatus is ergonomically designed for ease of use, and a simple manual depression of an actuator produces proportional movement of a linkage causing the implant or microimplant to be ejected through a cannula disposed at the desired location in the eye. Small gauge cannulas are provided for self-sealing methods of delivery.
摘要:
A multi-threaded DMA engine data transfer system for a data processing system and a method for transferring data in a data processing system. The DMA Engine data transfer system has at least one frame buffer for storing data transmitted or received over an interface. A multi-threaded DMA engine generates a plurality of requests to transfer data over the interface, processes the plurality of requests using the at least one frame buffer, and completes the transfer requests. The multi-threaded DMA engine data transfer system processes a plurality of data transfer requests simultaneously resulting in improved data throughput performance.