Abstract: This invention relates to a radio base station equipment and a mobile station equipment in a mobile communication system that operate as determination stations adapted for a predetermined navigation or associate with other radio base station(s) or mobile station(s) to radio-determine the location of a desired mobile station. The mobile communication system achieves a radio determination economically and reliably while flexibly adapting itself to the substantial traffic distribution and transmission characteristics in individual wireless zones as well as the zone configuration, channel allocation, the procedure of channel control, and the structure of hardware.

Abstract: A method of manufacturing niobium and/or tantalum powder consisting of: a first-stage reduction process of reducing niobium and/or tantalum oxides with alkali metals and/or alkaline-earth metals to obtain low-grade oxide powder represented by (NbTa) Ox, where x=0.06 to 0.35, a process of removing the oxide of alkali metals and/or alkaline-earth metals generated in the first-stage reduction process, and a second-stage reduction process of reducing the low-grade oxide powder obtained in the first-stage reduction process, with a melt solution of alkali metals and alkaline-earth metals to obtain niobium and/or tantalum powder.

Abstract: A communication system and method which automatically assign an appropriate emulated LAN (ELAN) domain to each attached end station. In the LAN emulation configuration server, an ATM address manager manages the associations between LAN stations and their relevant LAN emulation servers. When the identifier of a LAN station is given, it returns the ATM address of a suitable server for that station. To send such address requests, each LAN emulation client has an ATM address requesting unit. The ATM address requesting unit also requests the LAN emulation server to provide the ATM address of a broadcast server for the assigned ELAN. The obtained ATM addresses are stored and managed in an ELAN configuration database, together with the identifiers of stations and information about established network connections. Based on those operating parameters stored in the ELAN configuration database, a data communication unit conducts communication sessions between peer LAN stations.

Abstract: A control apparatus with a window control function including a distance computation unit for computing a signed n-bit distance as a result of subtraction of a second sequence number cyclically updated to vary like a modulo-N number from a first sequence number also cyclically updated to vary like a modulo-N number where N is a positive integer greater than 1 and the nth power of 2 is greater than N(2n>N), and a lowest-order-bit extraction unit for extracting m lowest-order bits of the distance where the mth power of 2 is equal to N(2m=N). The control apparatus further includes a distance judgment unit for forming a judgment as to whether or not the first sequence number is within a window set with the second sequence number used as a reference by comparison of the m lowest-order bits of the distance extracted by the lowest-order-bit extraction means with a size of the window.

Abstract: An injection locking system for lasers. In particular, a signal from a master laser is phase modulated and injected into a slave laser. The phase difference &phgr; is maintained at zero by way of a phase locked loop. By maintaining the phase difference &phgr; at zero, the frequency drift is compensated by maintaining the frequency within a predetermined locking range.