Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity.

Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.

Abstract: A method for determining a flow speed of a liquid in a fluid conduit is provided. During a signal-generating phase, an impulse signal is applied to a first ultrasonic transducer. A response signal is then received at a second ultrasonic transducer. A measuring signal is later derived from the response signal, wherein the derivation comprises reversing a signal portion with respect to time. During a measurement phase, a liquid moves with respect to the fluid conduit. The measuring signal is then applied to one of the two transducers and a response signal of the measuring signal is measured at the other transducer. A flow speed is derived from the response signal of the measuring signal.

Abstract: The miniaturized piezoelectric accelerometer includes a support frame (102) having a cavity (104) and a seismic mass (108) supported by a plurality of suspension beams (110) extending from the support frame (102). Each of the suspension beams (110) has a piezoelectric thin film coated on a top surface thereof, with a pair of inter-digital electrodes (114) deposited on an upper surface of each piezoelectric thin film. The presence of acceleration excites bending and thus strain in the piezoelectric thin film, which in turn causes electrical signals to be generated over terminals of the electrodes (114). To collect constructively the output of the electrodes (114), one terminal of each of the electrodes (114) is routed to and electrically connected at a top surface (308) of the seismic mass (108).

Abstract: A virtual SIM can be used in conjunction with a physical SIM to minimizing roaming charges. A mobile device can sign up with a primary telephone company to have a physical SIM and a primary telephone number. The mobile device can also sign up with a service provider that can have telephone partners in foreign countries. The foreign telephone partners can provide local coverage through a virtual SIM and the primary telephone number from the physical SIM.

Abstract: Methods and systems for promoting charity donations are provided, in which a person's contributions to a charity is calculated based on both monetary donations and efforts in publicizing the charity's cause in a social network. The efforts are credited with a monetary amount, allowing the person to donate actual money to a charitable cause with his work. The crediting of efforts with actual donation money can be used in a marketing campaign, in which the advertising budget is directed to charity donations with participations from members of a social network assistance.

Abstract: A system is provided that enables customers to search for event tickets for purchase. A computer interacts with the user to allow the user to specify criteria for event tickets the user wishes to purchase. The system presents relevant event ticket results, and provides filters for the user to further refine those search results. The user selects an event, and then selects tickets for that event. Ticket availability is shown, with seat locations indicated directly on an interactive venue map. For purchase, the user is directed to the selling ticket provider.

Abstract: A system is provided that enables customers to search for event tickets for purchase. A computer interacts with the user to allow the user to specify criteria for event tickets the user wishes to purchase. The system presents relevant event ticket results, and provides filters for the user to further refine those search results. The user selects an event, and then selects tickets for that event. Ticket availability is shown, with seat locations indicated directly on an interactive venue map. For purchase, the user is directed to the selling ticket provider.

Abstract: A system is provided that enables customers to search for event tickets for purchase. A computer interacts with the user to allow the user to specify criteria for event tickets the user wishes to purchase. The system presents relevant event ticket results, and provides filters for the user to further refine those search results. The user selects an event, and then selects tickets for that event. Ticket availability is shown, with seat locations indicated directly on an interactive venue map. For purchase, the user is directed to the selling ticket provider.

Abstract: A system is provided that enables customers to search for event tickets for purchase. A computer interacts with the user to allow the user to specify criteria for event tickets the user wishes to purchase. The system presents relevant event ticket results, and provides filters for the user to further refine those search results. The user selects an event, and then selects tickets for that event. Ticket availability is shown, with seat locations indicated directly on an interactive venue map. For purchase, the user is directed to the selling ticket provider.

Abstract: A device adapted to recognize a color dye frame from a color ribbon (for use in a thermal printer) comprises a LED (light emitting diode) capable of producing white light, positioned so that the ribbon passes between the LED and a photo-transistor. The photo-transistor collects the light emitted by the LED as it passes through the color dye frame and generate a specific exit voltage associated with the color of the dye frame. An analog to digital converter transforms the voltage into a digital signal which is fed into a micro-computer. The micro-computer processes the digital signal by comparing the digital signal to a stored set of values associated with each color dye frame.