Abstract: A radio relay device (100) is applied to a radio communication system wherein a period in which downlink data are transmitted and a period in which uplink data are transmitted are provided in time division in communication time frames that are segmented on a time axis. The radio relay device (100) is provided with a donor transceiver (120D) that exchanges data with a radio base station, a remote transceiver (120R) that exchanges data with a radio terminal, and controllers (130D, 130R) that alternately execute control to operate the donor transceiver (120D) and stop the remote transceiver (120R) in at least one communication time frame, and control to stop the donor transceiver (120D) and operate the remote transceiver (120R) in at least one communication time frame.

Abstract: A radio relay device (100) is applied to a radio communication system wherein a period in which downlink data are transmitted and a period in which uplink data are transmitted are provided in time division in communication time frames that are segmented on a time axis. The radio relay device (100) is provided with a donor transceiver (120D) that exchanges data with a radio base station, a remote transceiver (120R) that exchanges data with a radio terminal, and controllers (130D, 130R) that alternately execute control to operate the donor transceiver (120D) and stop the remote transceiver (120R) in at least one communication time frame, and control to stop the donor transceiver (120D) and operate the remote transceiver (120R) in at least one communication time frame.

Abstract: Antenna elements 20 are arranged at intervals “d” greater than &lgr;/2, e.g., 5&lgr;. A signal received by an antenna element 20 is sent by way of an antenna multiplexer 21 to a receiver 23, where the signal is demodulated. The thus-demodulated signal is sent to a phase-and-power detection section 25, where a phase and power of the signal are detected. On the basis of the result of such detection, a control section 26 calculates the phase and power of a transmission signal. On the basis of the result of the calculation, a transmission signal generation circuit 27 transmits a transmission signal to each of the antenna elements 20 by way of the antenna multiplexer 21.

Abstract: The inventive method calculates a position of the center of the eyeball as a fixed displacement from an origin of a facial coordinate system established by detection of three points on the face, and computes a vector therefrom to the center of the pupil. The vector and the detected position of the pupil are used to determine the visual axis.

Abstract: Characteristic features of images of an object eye are extracted to enable non-contact detection of eye movement. Two images of the eye are focused, and a differential image is generated to eliminate background noise and to permit feature extraction to be performed. In one feature of the invention, the illuminating light is polarized for use as a reference and the reflected light is separated to two light paths, each of which is focused to form an image of the object. In one path a polarizing plate blocks the regularly reflected light from the cornea so that only a diffused reflection component of the illuminating light from the other parts of the eye is passed, while in the other path both the regularly and diffusedly reflected light components are passed. A resulting differential image emphasizes the regular reflection component from the cornea relative to the background.

Abstract: An actuator for a magnetic disk device causes movement of a magnetic head in the radial direction of a rotating magnetic disk. Although this magnetic head is floated above the magnetic disk by a stream of air induced by the rotation of the magnetic disk at a high speed, an excessively high velocity of the air stream causes excessive vibrations of a soft gimbal resiliently supporting the magnetic head. In the actuator of the present invention, a head arm supporting the magnetic head through the gimbal is formed with a wind-breaking projection preventing direct impingement of the air stream against the gimbal and magnetic head, thereby minimizing vibrations of the gimbal and magnetic head.

Abstract: A magnetic disk storage device capable of avoiding the occurrence of vibration of magnetic disks and off-track of magnetic heads with respect to the magnetic disks, including an inner shroud enclosing a disk assembly composed of a multiplicity of magnetic disks stacked in superposed relation with spacers being interposed therebetween and formed at its outer peripheral wall with first ports for inserting access arms therethrough and at its top above a spindle supporting the disk assembly with a second port, a cylindrical filter for removing dust from air flowing through the second port of the inner shroud into the interior thereof, and a dust cover enclosing the inner shroud, actuators and filter. The provision of the inner shroud is conductive to prevention of development of turbulent air flow in the vicinity of the magnetic disks.