Abstract: According to one embodiment, a memory system includes a nonvolatile memory and a controller. The controller includes a circuit element. At a first timing, the controller acquires first identification information from a characteristic of the circuit element. The controller generates, using the first identification information, an encryption key for data to be written to the nonvolatile memory. The controller acquires aging information of the first identification information. The controller generates, using the aging information, auxiliary data for correcting an error included in second identification information, which is acquired from the characteristic of the circuit element at a second timing, to restore the first identification information.

Abstract: A haul vehicle control system includes a reference line creating unit configured to create, on the basis of a boundary curve of a running area in a work site where a haul vehicle runs, a reference line set in the running area, and a running course creating unit configured to create a running course for the haul vehicle which is set in the running area on the basis of the reference line.

Abstract: A self-test circuit includes a test circuit for processing input data and outputting output data having higher randomness than the input data; a storage unit for holding initial input data to be inputted to the test circuit when a self-test operation is performed on the test circuit; a feedback unit for feeding back, as input data to the test circuit, the output data which is obtained through processing of the input data by the test circuit and which is outputted from the test circuit; a control unit for controlling the number of times that the feedback unit feeds back the output data from the test circuit as input data to the test circuit; and a comparing unit for comparing the output data outputted from the test circuit and an expected value.

Abstract: A random number generation circuit has a ring oscillator which has odd number of inverting amplifiers connected in ring shape, a delay control circuit which generates a predetermined clock signal by delaying a reference clock signal, a first sampling circuit which samples an oscillation signal generated by the ring oscillator with the predetermined clock signal, a first logical equalization circuit which equalizes occurrence frequency of “0” and “1” of a sampling signal sampled by the first sampling circuit, a linear feedback shift register (LFSR) which generates random serial data based on an output signal of the first logical equalization circuit, and a serial-parallel converter which generates random parallel data used for controlling a delay amount of the delay control circuit by converting the random serial data from serial to parallel.

Abstract: An eye test chart includes a visual target for multiple test purposes composed of patterns of combinations of at lest two or more kinds of colors and predetermined shapes that are arranged at predetermined positions on an image area corresponding to visual field regions to be examined. Color vision defects and their abnormal regions can be identified as a result of a subject's visual identification of the visual targets arranged at the predetermined positions.

Abstract: A random number generation circuit has a ring oscillator which has odd number of inverting amplifiers connected in ring shape, a delay control circuit which generates a predetermined clock signal by delaying a reference clock signal, a first sampling circuit which samples an oscillation signal generated by the ring oscillator with the predetermined clock signal, a first logical equalization circuit which equalizes occurrence frequency of “0” and “1” of a sampling signal sampled by the first sampling circuit, a linear feedback shift register (LFSR) which generates random serial data based on an output signal of the first logical equalization circuit, and a serial-parallel converter which generates random parallel data used for controlling a delay amount of the delay control circuit by converting the random serial data from serial to parallel.

Abstract: An eye test chart includes a visual target for multiple test purposes composed of patterns of combinations of at lest two or more kinds of colors and predetermined shapes that are arranged at predetermined positions on an image area corresponding to visual field regions to be examined. Color vision defects and their abnormal regions can be identified as a result of a subject's visual identification of the visual targets arranged at the predetermined positions.

Abstract: A quantum effect device includes a first layer having a plurality of charge confinement regions, a second layer opposing the first layer and separated from the first layer, the second layer having charges at a high concentration and consisting of a metal layer or a semiconductor layer, and a third layer consisting of an insulating layer or a semiconductor layer having a large band gap between the first layer and the second layer.

Abstract: A semiconductor device includes a porous silicon layer with an impurity concentration of 1.times.10.sup.19 to 1.times.10.sup.21 cm.sup.-3, in which a plurality of pores are formed, and a thermal oxide film 0.01 to 10 .mu.m thick formed on the expanded surfaces of the porous silicon layer, wherein said expanded surfaces include internal surface of said pores.

Abstract: An intraocular lens (1) to be implanted in an anterior chamber (7) comprises a disk-shaped lens body (2) and a plurality of support legs (3, 4, 5, 6) extending in two opposite directions. The support legs (3, 4, 5, 6) are long enough for their distal ends (31, 41, 51, 61) to engagingly sit in ciliary sulci (9) when the support legs (3, 4, 5, 6) are inserted in and through fine bores or apertures 10 made by incision in a peripheral site of an iris (8).

Abstract: A lever switch assembly features an operation lever which has one end disposed in a hollow or cavity defined in a movable switch element and is pivotally supported thereon by two boss-like lugs which project out from opposite sides of the lever. The lugs are received in blind bores formed in springy finger-like projections which form part of the movable switch element. The movable switch element is housed in a case and pivotally supported thereon so as to be rotatable about an axis which is normal to the axis about which the operation lever is pivotal. A pair of electrodes which is disposed on the operation lever is arranged to remain in constant contact with intermediate contacts which are supported on the movable switch element, irrespective of the pivotal movement of the lever. The intermediate contacts maintain a constant electrical connection between the electrodes on the lever and electrodes which are provided on the case.