摘要:
Disclosed is an automatic, self propelled lawn mower that references its position within a cutting area using electronically stored path and terrain information as a primary navigation system, senses a non magnetic, non-current carrying metallic guide path as a secondary navigation system, senses underground metallic references for use as position reference points as a further navigation system, incorporates an ultrasonic obstacle detection system to stop the vehicle if unexpected obstacles are encountered. The vehicle further includes a cow-catcher front bumper arrangement to divert small objects away from the cutting blades, contains bumper switches to shut off the vehicle upon contact with large objects, contains an inclinometer sensor to halt the vehicle during unexpected tilting, incorporates a radio communications link to notify an off-board monitoring system of problems, contains an on-board power generation system using an internal combustion engine, generator, and a battery arrangement. The lawn mower also provides a navigation controller and servo motor positioning system that plans path motion, using sensory data and stored map data and to turn the drive wheels to propell the vehicle in the desired manner.
摘要:
A product comprising a natural acellular xenogenic vascular tissue matrix having at least an 80% reduction in DNA content as compared to an untreated control vascular tissue matrix and being antigenically inert by being substantially free of epitopes capable of reacting with pre-formed human antibodies and also without having the ability to substantially activate complement. The invention also includes methods of preparing such products and uses of the products especially in bypass surgery.
摘要:
A system and method for organizing social activity information on a website is disclosed. The system comprises a feed serving module and a presentation module. The feed serving module is configured to receive social activity of at least a first user from at least one third-parity source. The feed serving module aggregates the social activity information to form aggregated social activity information. The presentation module is communicatively coupled to the feed serving module and is configured to receive the aggregated social activity information from the feed serving module. The presentation module generates feed display associated with the aggregated social activity information and sends feed display to a client for display to a second user.
摘要:
Nanostructures and photovoltaic structures are disclosed. Method for creating nanostructures are also presented. A method according to one embodiment includes adding a template to a substrate; depositing conductive material in the template thereby forming an array of conductive nanocables on the substrate; removing at least part of the template; and depositing at least one layer of photovoltaic material on exposed portions of the conductive nanocables. A nanostructure according to one embodiment includes an array of nanocables extending from a substrate, the array of nanocables having physical characteristics of having been formed using an at least partially removed template; an insulating layer extending along the substrate; and at least one layer of photovoltaic material overlaying portions of the nanocables.
摘要:
The present invention provides a method of, and apparatus for, utilizing ultrasonic energy so as to mechanically disrupt the collagenous architecture of biological matrices in a controlled manner so that the tissue can be rapidly recellularized in continuous form. The present invention also provides for the production of tissue matrices with improved recellularization properties, cell stratification or patterning.
摘要:
The present invention relates to a method of preparing a tissue matrix and its subsequent use in the replacement and/or repair of a damaged or defective meniscus. The invention also provides meniscal tissue that is substantially decellularised.
摘要:
In one embodiment, a stationary exercise station is provided. The stationary exercise station includes a computer which may run a computer program. The computer program simulates the motion of a first virtual bicycle and a second virtual bicycle. The first virtual bicycle and the second virtual bicycle riding through a predetermined landscape. The computer program simulates moving images seen by the virtual rider of the first virtual bicycle while riding through the predetermined landscape.The stationary exercise station also include a video monitor in communication with the computer. The video monitor displays the moving images seen by the virtual rider of the first virtual bicycle while riding through the predetermined landscape. The stationary exercise station also includes steerable handlebars, rotatable pedals, a force resisting pedal rotation, and a movable gear-shifting member. The motion of the virtual bicycle is determined by the steering of the steerable handlebars, rotation of the rotatable pedals, and motion of the moveable gear-shifting member. The force resisting pedal rotation is proportional to the slope experienced by the virtual bicycle riding through the predetermined landscape.
摘要:
Various embodiments of the present invention provide (a) an inexpensive apparatus enabling the measurement of power dissipated by the rider of a cardio-fitness station (or any other stationary bicycle) that does not depend on manufacturing tolerances or machine condition variations, and (b) a method of using the data measured by such an apparatus to improve the accuracy of exercise condition settings by implementing the invented apparatus into a closed-loop control system which improves the quality of the exercise experience and enhances the adoption of exercise on a cardio-fitness station employing this as a community activity.
摘要:
Provided are coaxial waveguide microstructures. The microstructures include a substrate and a coaxial waveguide disposed above the substrate. The coaxial waveguide includes: a center conductor; an outer conductor including one or more walls, spaced apart from and disposed around the center conductor; one or more dielectric support members for supporting the center conductor in contact with the center conductor and enclosed within the outer conductor; and a core volume between the center conductor and the outer conductor, wherein the core volume is under vacuum or in a gas state. Also provided are methods of forming coaxial waveguide microstructures by a sequential build process and hermetic packages which include a coaxial waveguide microstructure.