Akira c

Bio: Akira c is an academic researcher from Hitachi. The author has contributed to research in topics: Signal & Layer (electronics). The author has an hindex of 26, co-authored 310 publications receiving 2300 citations. Previous affiliations of Akira c include Shin-Etsu Chemical.

Semiconductor light-emitting element and method of manufacturing the same

Abstract: There is disclosed a semiconductor light-emitting element comprising a substrate (10) having a first surface and a second surface, and a semiconductor laminate formed on the first surface of the substrate and containing a light-emitting layer (12) and a current diffusion layer (15) having a light-extracting surface, which is characterized in that the light-emitting element is provided with a light-extracting surface which is constituted by a finely recessed/projected surface, 90% of which is constructed such that the height of the projected portion thereof having a cone-like configuration is 100 nm or more, and the width of the base of the projected portion is within the range of 10-500 nm

Data communications system

Abstract: A transmitting side relay device (110) comprises additional information generation means (111) for generating additional information about the characteristics of a data stream, packet generation means (112) for generating a packet by attaching additional information to each transfer unit and transmitting means (113) for transmitting the packet to the third network according to prescribed procedures. A receiving side relay device (120) comprises separation means (121) for breaking down the received packet into additional information and a transfer unit, analysis means (122) for analyzing the additional information, reproduction means (123) for locating information included in a corresponding transfer unit in an appropriate position and reproducing the data stream and output means (124) for outputting the data stream reproduced by the reproduction means to the second network.

Phase difference measuring apparatus and mass flowmeter thereof

Abstract: A phase difference measuring apparatus for accurately measuring the phase difference (fine time difference) of two signals with the same frequency with a reduced number of bits for A/D conversion is disclosed. In addition to output signals of an upstream side pickup and a downstream side pickup of a mass flowmeter, an output signal of the upstream side pickup or the downstream side pickup is supplied to a comparator, a PLL circuit, an antialiase filter, a sample and hold circuit, and an A/D converter. These circuits quantize these signals and send the quantized signals to a band pass filter. The band pass filter extracts a predetermined signal component and outputs it to a DFT. The DFT performs complex Fourier transformation on the input signal. Thus, the phase difference between two signals with the same frequency (such as an upstream side pickup signal and a downstream side pickup signal) can be accurately detected with a reduced number of bits for each of the A/D converters.

Recorded information reproducing device

Abstract: A recorded information reproducing device suitable for use in a kara-oke device and the like which reproduces sound information recorded on an information recording medium such as a CD (Compact Disk), LVD (laser Video Disk) or the like according to the MIDI (Musical Instrument Digital Interface) standards, and also which allows repeated practice in synchronization with the progress of music in kara-oke and the like. The recorded information reproducing device 100 which reproduces sound from an information recording medium M on which encoded musical information AI and control information CI are recorded according to the MIDI standards. The recorded information reproducing device 100 includes a musical information reproduction unit 101 for decoding the musical information to output reproduced musical information S A ; a control information reproduction unit 102 for decoding the control information to output a clock signal S C for timing control; and a control means 103A, in accordance with the clock signal S C , for controlling the sequence of reproduction of the music information in the music information reproduction unit 101 or a data storage means 103B, in accordance with the clock signal S C , for temporarily storing the reproduced musical information S A before it is output.

Laser-based maintenance apparatus

Abstract: A laser maintenance apparatus including a laser system which includes an optical system for emitting, in a first irradiation condition, a generation laser beam for generating an ultrasonic wave in a portion of an object on which maintenance is to be performed, and including a laser source configured to generate and detect a detection laser beam which interacts with the ultrasonic wave generated by the laser light beam in the first condition The laser maintenance apparatus also includes a light transmitting device for transmitting laser light emitted from the laser system, a laser irradiation device for irradiating laser light transmitted by the light transmitting device to the object portion, and a transporting/scanning mechanism for transporting the light transmitting device and the laser irradiation device to a portion near the object portion, and scanning over an arbitrary range at the object portion

Method and apparatus for browsing using multiple coordinated device sets

Abstract: Systems and methods for navigating hypermedia using multiple coordinated input/output device sets. Disclosed systems and methods allow a user and/or an author to control what resources are presented on which device sets (whether they are integrated or not), and provide for coordinating browsing activities to enable such a user interface to be employed across multiple independent systems. Disclosed systems and methods also support new and enriched aspects and applications of hypermedia browsing and related business activities.

Location-based services

Abstract: Provided herein are methods and systems relating to location-based services such as social networking, providing demographic information, tracking mobile devices, providing business information, providing an adaptable user interface, remotely effecting a change on a portable electronic device, providing a geofence, outputting location-based information on a mobile device, varying transmissions to and from a mobile device, providing location-based alerts, verifying transactions and tailoring information to the behavior of a user.

Method and Apparatus for Browsing Using Alternative Linkbases

Abstract: Systems and methods for navigating hypermedia using multiple coordinated input/output device sets. Disclosed systems and methods allow a user and/or an author to control what resources are presented on which device sets (whether they are integrated or not), and provide for coordinating browsing activities to enable such a user interface to be employed across multiple independent systems. Disclosed systems and methods also support new and enriched aspects and applications of hypermedia browsing and related business activities.

Blades with functional balance asymmetries for use with ultrasonic surgical instruments

Abstract: Disclosed is an ultrasonic surgical instrument that combines end-effector geometry to best affect the multiple functions of a shears-type configuration. The shape of the blade is characterized by a radiused cut offset by some distance to form a curved geometry. The cut creates a curved surface with multiple asymmetries causing multiple imbalances within the blade. Imbalance due to the curve of the instrument is corrected by a non-functional asymmetry proximal to the functional asymmetry. Imbalance due to the asymmetric cross-section of the blade is corrected by the appropriate selection of the volume and location of material removed from a functional asymmetry. The shape of the blade in one embodiment of the present invention is characterized by two radiused cuts offset by some distance to form a curved and potentially tapered geometry. These two cuts create curved surfaces including a concave surface and a convex surface. The length of the radiused cuts affects, in part, the acoustic balancing of the transverse motion induced by the curved shape.

Nitride semiconductor light emitting device

Abstract: A nitride semiconductor light-emitting device has an active layer of a single-quantum well structure or multi-quantum well made of a nitride semiconductor containing indium and gallium. A first p-type clad layer made of a p-type nitride semiconductor containing aluminum and gallium is provided in contact with one surface of the active layer. A second p-type clad layer made of a p-type nitride semiconductor containing aluminum and gallium is provided on the first p-type clad layer. The second p-type clad layer has a larger band gap than that of the first p-type clad layer. An n-type semiconductor layer is provided in contact with the other surface of the active layer.