Abstract: A parts placement calculation system comprises parts selection means 18 for selecting parts with the highest parts point value, store selection means 20 for selecting a store with the highest store point value, and placement determination means 22 for determining whether or not parts can be placed in a store based on a predetermined constraint condition for placing the parts. When the placement determination means 22 determines that parts cannot be placed in a store, the store is deleted from a list of placement possible stores, and then the store selection means 20 is activated again. When the placement determination means 22 determines that parts can be placed in a store, a parts area for placing the target parts are determined within the store. Then, after the parts are deleted from the list of parts to be placed, the parts selection means 18 is reactivated.

Abstract: A device determines and subsequently corrects the dispersive influence on a measurement made according to the principles of phase or pulse modulation along a visible range. The device has an element for emission of electro-magnetic radiation with two carrier wavelengths in the border regions of the visible spectrum. After passing through a volume of atmosphere to be probed, and reflection, the radiation is received and the dispersive influence, for instance, on the distance measurements, is calculated and corrected.

Abstract: There is disclosed a piezoelectric single crystal wafer wherein an etching pit density on the front surface of the wafer on which an electrode for transmit-receive of surface acoustic wave or leaky surface acoustic wave is formed is 7.8×104/mm2 or less, and a piezoelectric single crystal wafer wherein surface roughness Ra on the peripheral surface other than the front surface and the reverse surface of the wafer is 2.3 &mgr;m or less. There can be provided a piezoelectric single crystal wafer wherein a deviation of surface acoustic wave velocity or leaky surface acoustic wave velocity is small, namely the uniformity of the velocity is excellent, and fine contaminations adhered on the surface where electrode is formed and breakage of the wafer can be significantly reduced, and therefore a device such as a filter having excellent property can be produced in high yield.

Abstract: A method of connecting respective one end portions of two carrier tapes, to each other, each of the two tapes having accommodating pockets at a first pitch and tape-feed holes at a second pitch, each of the accommodating pockets accommodating an electric component, the method including the steps of aligning a tape connecting member which includes a flat main portion having tape-feed holes at a third pitch equal to the second pitch, and caulking projections projecting perpendicularly from the flat main portion, with the respective one end portions of the two tapes, such that tape-feed holes of the connecting member are aligned with respective tape-feed holes of the two tapes, causing at least two caulking projections of the connecting member to penetrate through respective thickness of the two tapes, so that the flat main portion of the connecting member contacts respective one major surfaces of the two tapes, and caulking respective portions of the two caulking projections that penetrate out of the respective

Abstract: The caseband (2) of the watchcase (1) comprises one or two hollows (20, 25) for receiving the end of each length of watchband. The ends of the watchband are held by attachments such as claws (30) or recesses (32, 25), matching notches (40) or protuberances (41, 42) situated near the ends of the watchband, and disposed on extensions of the back (3) of the watchcase or on intermediate parts (33, 43, 44, 50, 56) integral with the watchcase back or with the caseband. This arrangement not only facilitates the manufacture and finishing of the watchcase by eliminating any projecting elements which would interfere with production on automatic machines, but also enables the watchband attachment to be made more attractive.