Abstract: An entire-visual-field projection device which projects image information relating to an entire-visual-field image onto a spherical screen to provide the entire-visual-field image to a viewer positioned inside the screen. The projection device is provided with the spherical screen, a pair of projectors which project the entire-visual-field image onto the screen and are arranged opposite each other with the center of the screen therebetween, and a double-convex mirror for projection which reflects luminous fluxes from the projectors toward the screen and is disposed in the vicinity of the center of the screen. A projection luminous flux from one of the projectors is emitted to one of the convex surfaces of the mirror, and that from the other projector to the other convex surface of the mirror.

Abstract: An entire-visual-field projection device which projects image information relating to an entire-visual-field image onto a spherical screen to provide the entire-visual-field image to a viewer positioned inside the screen. The projection device is provided with the spherical screen, a pair of projectors which project the entire-visual-field image onto the screen and are arranged opposite each other with the center of the screen therebetween, and a double-convex mirror for projection which reflects luminous fluxes from the projectors toward the screen and is disposed in the vicinity of the center of the screen. A projection luminous flux from one of the projectors is emitted to one of the convex surfaces of the mirror, and that from the other projector to the other convex surface of the mirror.

Abstract: A memory system includes a plurality of output buffers each of which outputs one of a plurality of one-bit signals forming data. The output buffers are put into a plurality of buffer groups. The memory system further includes a controller for feeding timing signals to the corresponding buffer groups via delay circuits having mutually different time constants, respectively. The timing signals include certain timing which causes the output buffers to output the corresponding one-bit signals. Since the foregoing certain timing is delayed depending on the time constants of the delay circuits, although the output buffers in the same buffer group output the corresponding one-bit signals simultaneously, the output buffers in the different buffer groups output the corresponding one-bit signals with mutually different timing.

Abstract: An automatic dialing apparatus includes a computer having a dialing control section. The computer issues an automatic dialing instruction to control the operation of the exchange. The dialing control section extracts the customer telephone number from the customer DB, calculates an optimum number of dialings and issues a dialing instruction to the exchange. The number of dialing calls is calculated based on the number of operators, the target operating efficiency, the number of operators in conversation, the number of operators in working, the number of calls during dialing and the responding rate. When the customer is in conversation or absent, the re-dialing is effected at a preset interval and by a preset number of times.