Abstract: A magnesium alloy which has excellent tensile strength and elongation at a room temperature, as well as an excellent heat resistance represented by creep resistance is obtained. The magnesium alloy is produced which comprises 3.0% by mass or more and less than 6.0% by mass of Al, 0.10% by mass or more and 0.60% by mass or less of Mn, more than 0.50% by mass and less than 2.0% by mass of Ca, and more than 0.10% by mass and less than 0.40% by mass of Si, and has a balance composed of Mg and unavoidable impurities.

Abstract: A time slot selecting method applied to a time division switch in a time division switching network having multi-stage tandem connected time division switches. A controller associated with an upstream time division switch selects an outgoing idle time slot for multi-slot information in accordance with a predetermined time slot selecting order in a manner that the number of combinations of time slots selectable by a downstream time division switch becomes large. Thus, the range of selecting time slots by a downstream time division switch becomes broadened while ensuring the sequence integrity of multi-slots in a frame and hence a path blocking rate is reduced.