Water is vaporized in an annular upper region of a subsurface formation into which borehole extends from the surface. This creates a... Show moreWater is vaporized in an annular upper region of a subsurface formation into which borehole extends from the surface. This creates a substantially nonconducting dielectric in such region extending outwardly from the borehole. Such vaporization is preferably achieved by the application of electrical power to an electrode disposed in the borehole. Liquid is produced through the borehole from a lower region of the formation to cool the lower region near the borehole and maintain an electrically conductive path between the formation and the electrode in such lower region through which electrical power is applied to the formation. Sponsorship: IIT Research Institute United States Patent Show less
A method for determining an optimal placement of wavelength converters in an optical network while optimizing bandwidth use in which a... Show moreA method for determining an optimal placement of wavelength converters in an optical network while optimizing bandwidth use in which a skeleton undirected graph of a WDM network is generated, a contraction graph is constructed from the skeleton undirected graph, and a minimum vertex cover of the contraction graph is determined. Sponsorship: Illinois Institute of Technology United States Patent Show less
The present invention relates to the magnetic recording of televisions signals. The source of video signals is a television receiver. Adapter... Show moreThe present invention relates to the magnetic recording of televisions signals. The source of video signals is a television receiver. Adapter circuitry is disclosed which includes a detachable cable for coupling the magnetic transducing heads with the video output of the receiver for the purpose of recording the broadcast signal or the display of the reproduced video signal derived from the tape. Detachment of the cable places the television receiver in a condition to allow the display of the broadcast video instead of recording the broadcast video signal. Sponsorship: IIT Research Institute United States Patent Show less
Monochrome and color television recording and playback circuitry for coupling of a video magnetic transducer head with a standard broadcast... Show moreMonochrome and color television recording and playback circuitry for coupling of a video magnetic transducer head with a standard broadcast television receiver, the circuitry including an inductor connected in series between the transducer head and the input of the playback amplifier and disposed closely adjacent the amplifier input for blocking transmission of stray radio frequency energy to the amplifier. Sponsorship: IIT Research Institute United States Patent Show less