Abstract: A system for determining at least one property of a sheet dielectric sample using terahertz radiation includes at least one terahertz transmitter configured to output a pulse of terahertz radiation, a terahertz receiver configured to receive at least a portion of the pulse of terahertz radiation, wherein the terahertz receiver is configured to output a measured waveform based on the terahertz radiation received by the terahertz receiver, and a control unit in communication with the terahertz receiver. Wherein the control unit is configured to choose at least one region of interest of the measured waveform, compare the at least one region of interest of the measured waveform to a model waveform, vary at least one parameter of a model waveform to minimize the difference between the model waveform and the measured waveform.

Abstract: A system for transmitting and receiving electromagnetic radiation includes a beam splitter and a transceiver. The beam splitter is configured to separate an optical pulse into a pump pulse and a probe pulse. The transceiver may include a transmitter switch and a receiver switch. The pump pulse is directed toward the transmitter switch and the probe pulse is directed towards the receiver switch. Electromagnetic radiation is emitted from the transceiver when the pump pulse strikes the transmitter switch. The electromagnetic radiation may be terahertz radiation in either a pulsed or continuous wave form.

Abstract: Apparatus for generating an RF signal for use in RF signal detection is described. The apparatus comprises at least one processor configured to generate a set of IQ data based on at least one set of weighted IQ data, each set of weighted IQ data having a respective weight and a circuit configured to generate an RF signal using the set of IQ data. The at least one processor is configured to calculate each respective weight in dependence upon location of a signal detector or an antenna associated with the RF signal detector.

Abstract: A system for determining at least one property of a sheet dielectric sample using terahertz radiation includes at least one terahertz transmitter configured to output a pulse of terahertz radiation, a terahertz receiver configured to receive at least a portion of the pulse of terahertz radiation, wherein the terahertz receiver is configured to output a measured waveform based on the tera-hertz radiation received by the terahertz receiver, and a control unit in communication with the terahertz receiver. Wherein the control unit is configured to choose at least one region of interest of the measured waveform, compare the at least one region of interest of the measured waveform to a model waveform, vary at least one parameter of a model waveform to minimize the difference between the model waveform and the measured waveform.

Abstract: A system for transmitting and receiving electromagnetic radiation includes a beam splitter and a transceiver. The beam splitter is configured to separate an optical pulse into a pump pulse and a probe pulse. The transceiver may include a transmitter switch and a receiver switch. The pump pulse is directed toward the transmitter switch and the probe pulse is directed towards the receiver switch. Electromagnetic radiation is emitted from the transceiver when the pump pulse strikes the transmitter switch. The electromagnetic radiation may be terahertz radiation in either a pulsed or continuous wave form.

Abstract: Apparatus for generating an RF signal for use in RF signal detection is described. The apparatus comprises at least one processor configured to generate a set of IQ data based on at least one set of weighted IQ data, each set of weighted IQ data having a respective weight and a circuit configured to generate an RF signal using the set of IQ data.

Abstract: Apparatus for generating an RF signal for use in RF signal detection is described. The apparatus comprises at least one processor configured to generate a set of IQ data based on at least one set of weighted IQ data, each set of weighted IQ data having a respective weight and a circuit configured to generate an RF signal using the set of IQ data. The at least one processor is configured to calculate each respective weight in dependence upon location of a signal detector or an antenna associated with the RF signal detector.

Abstract: A semiconductor structure includes a GaAs or InP substrate, an InxGa1-xAs epitaxial layer grown on the substrate, where x is greater than about 0.01 and less than about 0.53, and a wider bandgap epitaxial layer grown as a cap layer on top of the InxGa1-xAs epitaxial layer.

Abstract: Apparatus for generating an RF signal for use in RF signal detection is described. The apparatus comprises at least one processor configured to generate a set of IQ data based on at least one set of weighted IQ data, each set of weighted IQ data having a respective weight and a circuit configured to generate an RF signal using the set of IQ data.

Abstract: An interactive television program guide is provided in which advertisements may be displayed in program listings display regions on program guide screens. The program listings display regions may be browse displays or flip displays. The program guide screens contain video for the current channel to which the user is tuned. The program listings display regions containing the advertisements may be overlaid on top of the current channel. Alternatively, the video for the current channel may be provided in a reduced-size video window. The advertisements may contain video. The advertisements may be used to promote television programs and conventional goods and services. Advertisements may be selectable. When a user selects an advertisement, the program guide provides the user with an opportunity to order products or services, request information, set reminders for upcoming programs, view program descriptions, record programs, or take other such actions.

Abstract: A system and method to measure, with increased precision, the transit time position(s) of pulses in a time domain data. An example data set would be the transit time of pulses in Time-Domain Terahertz (TD-THz) data. The precision of the pulse timing directly affects the precision of determined sample properties measurements (e.g., thickness). Additionally, an internal calibration etalon structure and algorithm method provides for continuous system precision/accuracy check method to increase sample measurement integrity. The etalon structure can improve the precision of sample property measurements (e.g., absolute thickness). Various hardware and system implementations of the above are described.

Abstract: A lobed bushing is provided for a track assembly of a track-type machine. The track assembly includes a first chain and a second chain coupled together with a track pin. A bushing, defining a longitudinal axis, includes a central bore oriented along the longitudinal axis and extending from a first end of the bushing to a second end of the bushing for receiving the track pin. The bushing includes a first lobe positioned at a first location about the longitudinal axis and a second lobe positioned at a second location about the longitudinal axis that is less than about 180° from the first location. The first end of the bushing has a substantially cylindrical shape.

Abstract: A system and method to measure, with increased precision, the transit time position(s) of pulses in a time domain data. An example data set would be the transit time of pulses in Time-Domain Terahertz (TD-THz) data. The precision of the pulse timing directly affects the precision of determined sample properties measurements (e.g., thickness). Additionally, an internal calibration etalon structure and algorithm method provides for continuous system precision/accuracy check method to increase sample measurement integrity. The etalon structure can improve the precision of sample property measurements (e.g., absolute thickness). Various hardware and system implementations of the above are described.

Abstract: A lobed bushing is provided for a track assembly of a track-type machine. The track assembly includes a first chain and a second chain coupled together with a track pin. A bushing, defining a longitudinal axis, includes a central bore oriented along the longitudinal axis and extending from a first end of the bushing to a second end of the bushing for receiving the track pin. The bushing includes a first lobe positioned at a first location about the longitudinal axis and a second lobe positioned at a second location about the longitudinal axis that is less than about 180° from the first location. The first end of the bushing has a substantially cylindrical shape.

Abstract: A system for dispersion compensation in a terahertz system includes an optical fiber configured to transmit an optical pulse, a compensator optically coupled to the optical fiber, the compensator configured to compensate for a dispersion of the optical pulse caused as the optical pulse propagates through the optical fiber, and an optically induced terahertz device optically coupled to the compensator, whereby the optically induced terahertz device is configured to transmit or receive terahertz radiation.

Abstract: A semiconductor structure includes a GaAs or InP substrate, an InxGa1-xAs epitaxial layer grown on the substrate, where x is greater than about 0.01 and less than about 0.53, and a wider bandgap epitaxial layer grown as a cap layer on top of the InxGa1-xAs epitaxial layer.

Abstract: An interactive television program guide is provided in which advertisements may be displayed on program guide screens. Banner advertisements may be displayed above and below program listings. Panel advertisements may be provided adjacent to program listings. The advertisements may contain video. The advertisements may be used to promote television programs and conventional goods and services. When a user selects an advertisement, the program guide provides the user with an opportunity to order products or services, request information, set reminders for upcoming programs, view program descriptions, record programs, or take other such actions. Embedded advertisements may be provided within the program listings region and may be automatically displayed immediately adjacent to related program listings.

Abstract: The invention relates to a brewed beverage maker with a diverter valve assembly placed between a heater and a showerhead, the diverter valve assembly fluidly connected to both the heater and showerhead. Opening the beverage maker during a brew cycle automatically causes at least a portion of the fluid passing through the diverter valve assembly to be diverted to a channel that directs the fluid to a point downstream of the showerhead in the brew cycle. In one embodiment of the invention, the diverted fluid is directed to a filter basket. The channel may optionally include a basin to collect and direct the diverted fluid. The outlet of the diverter valve assembly may form the showerhead.

Abstract: An interactive television program guide system and method is provided. Time separators are displayed within lists of program listings to allow users to more easily view the program listings. On-screen arrows have their display characteristics changed according to user actions. Similar program listings are displayed only once when using search program listings. Users are provided with an opportunity to view channel information before setting channels as favorites. Information from local information services is provided in program guide display screens that are configurable by a main facility. Users are provided with an opportunity to centrally lock and unlock programs, and to bypass locks when desired.

Abstract: A multimedia software application that can include audio, video and/or graphics, in a manner that combines the multimedia experience with the transfer of information from and between a variety of sources (126), in a variety of directions, and subject to a variety of prompts. The application provides a “Web in Page” approach, in which a series of windows have the same or similar “look and feel”, yet can be used to access and display information from a variety of sources (126), including local content (112) (hard drive or other locally stored media), and web-based online content (118), including that available from a dedicated, integrated server (114), affiliated servers (114), or even other computer users. The application of the present invention can be provided in stand-alone form, to be loaded on a client device (116) (e.g., personal computer) from either a recorded medium or downloaded online.