Abstract: A power generating system includes an engine, a generator, an inverter device interconnected with a commercial power supply, and a control device having a phase locked loop circuit, which includes an output port connected to a PWM circuit and increases a frequency of a command current supplied thereto upon an input of a timing voltage signal while the commercial power supply fails, wherein the control device controls the command current to correspond to phase of the timing voltage signal while the inverter device is actuated, fluctuates a phase of the command current by a first variable and calculates a phase difference between the command current and the timing voltage signal, in order to temporarily determine a possibility of the power outage, and then upon a temporal positive conclusion, the control device forcibly fluctuates the phase of the command current by a second variable and conclusively detects the power outage.

Abstract: A content display system is disclosed for offering, excellent multimedia content browsing/viewing environments to handheld device users, from a server of a communication network, by the use of a handheld device and a cooperating computer device cooperated to the handheld device.

Abstract: A communication system capable of avoiding congestion in transmission of moving image data, includes (1) at least one receiving terminal, (2) a moving image delivery device for delivering moving image data to the at least one receiving terminal, (3) a moving image conversion device which has at least one moving image conversion unit for converting, in accordance with conversion parameters, the moving image data sent from the moving image delivery device, a conversion parameter setting unit for determining the conversion parameters, and a monitored result receiving unit, and (4) at least one packet switching node which has at least one data storage unit for preliminarily storing the moving image data from the moving image conversion device to be sent to the at least one receiving terminal, a data amount monitor unit for monitoring an amount of the moving image data stored in the at least one data storage unit to judge that the monitored data amount reaches a first threshold, and a monitored result sending unit

Abstract: A content display system is disclosed for offering, excellent multimedia content browsing/viewing environments to handheld device users, from a server of a communication network, by the use of a handheld device and a cooperating computer device cooperated to the handheld device.

Abstract: A method and an apparatus for aligning and supplying an electrical component capable of aligning a first electrical component to be mounted on a second electrical component relative to a suction head without using a pre-alignment stage. On supplying an IC chip being the first electrical component to a position at which the IC chip is mounted on a liquid crystal panel being the second electrical component with the suction head sucking the IC chip, after the suction head sucks the IC chip in a recessed portion in a container, the suction head is moved in an X direction and the container is moved in a Y direction to thereby cause the IC chip abut a wall of the recessed portion, and thereafter the movements in the X and Y direction are still carried out to thereby displace the suction position of the IC chip relative to the suction head to achieve the alignment thereof.

Abstract: A communication system capable of avoiding congestion in transmission of moving image data, includes (1) at least one receiving terminal, (2) a moving image delivery device for delivering moving image data to the at least one receiving terminal, (3) a moving image conversion device which has at least one moving image conversion unit for converting, in accordance with conversion parameters, the moving image data sent from the moving image delivery device, a conversion parameter setting unit for determining the conversion parameters, and a monitored result receiving unit, and (4) at least one packet switching node which has at least one data storage unit for preliminarily storing the moving image data from the moving image conversion device to be sent to the at least one receiving terminal, a data amount monitor unit for monitoring an amount of the moving image data stored in the at least one data storage unit to judge that the monitored data amount reaches a first threshold, and a monitored result sending unit

Abstract: An interworking apparatus for roaming among a plurality of mobile network having different inter-network signaling protocols is connected to the plurality of mobile networks and has a database record for holding network identity information for identifying a mobile network to which at least one mobile user (mobile station and another mobile terminal such as IC device) to be traced is visited.

Abstract: The radio communication system has at least one first radio station such as a base station and a plurality of second radio stations such as mobile stations. The base station at least possesses a public key, and each of the mobile stations possesses a public-key cryptography function for using the public key and an identity itself. An identity confidentiality method includes steps of generating a time-varying public key at the base station based upon a predetermined time initial, and repeatedly broadcasting, from the base station, the generated time-varying public key to all the mobile stations. The mobile stations cipher their respective identities with the broadcasted time-varying public key so that the encrypted/identities of the mobile stations, which are sent to the base station, remain confidential. After enciphering their identity, the mobile stations wait to be called.

Abstract: The present invention provides a method for producing an aluminum nitride sintered body having excellent characteristics and an aluminum nitride powder conveniently and inexpensively. The present invention relates to a method for production of an aluminum nitride sintered body comprising forming a metal aluminum power into a thin-plate like shape, heating the formed body to a temperature not exceeding the melting point of aluminum in a vacuum atmosphere, and then sintering it under N.sub.2 pressure (1-150 kg/cm.sup.2), and a method for production of an aluminum nitride powder comprising heating a metal aluminum powder to a temperature not exceeding the melting point of aluminum in a vacuum atmosphere, sintering it under N.sub.2 pressure (1-150 kg/cm.sup.2, and further cooling and pulverizing it.

Abstract: An authentication system whereby authentication load can be distributed in the network without sharing secret information of users is provided.The system has a single master authentication center arranged in the network, the master authentication center sharing with the user a user secret key, and a plurality of slave authentication centers sharing with the master authentication center respective secret keys different from the user secret key. The master authentication center authenticates the user by using the user secret key and issues a certificate information which certifies legitimation of the user, to the user if the user is authenticated as a legitimate user. The slave authentication center authenticates the certificate information from the user and issues a permission information which allows an access to a specified server or an application server in the network, to the user if the user is authenticated as a legitimate user.

Abstract: A molten metal is poured into and stored in a hopper in a rotary-mold gravity casting process, so that a small amount of the molten metal is allowed to flow out of the hopper into a runner to previously fill up the runner. A casting mold is rotated from this state, thereby causing the molten metal to be filled from the hopper into a cavity by a difference in height generated between the molten metal level in the hopper and the molten metal level in the casting mold. Thus, when the molten metal, once stored in the hopper, is filled into the cavity in the casting mold by rotating the casting mold, the inclusion of air can be prevented from being produced due to ruffling of the molten metal in the cavity.

Abstract: Sliced workpieces severed from a metal extrusion transversely of it and into a desired thickness, or bent ones made from the extruded metal pipes, are restrained at their regulated correct positions each in its entirety or in part. Subsequently, the workpieces are compressed in a direction to the thickness or in the direction perpendicular to the primary bending direction. Plastic deformation of or exceeding 0.5%, or more preferably 2-5%, will be produced in each workpiece. Alternatively, those sliced or bent workpieces may be pressed in a direction to that of thickness or in the direction perpendicular to a previous bending, after each workpiece is restrained in its entirety or in part at the regulated correct dimension.

Abstract: In the preliminary authentication stage, the mobile station (35) is authenticated by sending from the home network (30) to the roamed network (31), a plurality of pairs of first random numbers (RNDa.sub.1, . . . , RNDa.sub.n) and calculation results (SRESa.sub.1, . . . , SRESa.sub.n) of the cipher function (f), which calculation is performed at the home network using the secret key (ki) and the first random numbers (RNDa.sub.1, . . . , RND.sub.an), by sending, from the roamed network to the mobile station, third random numbers formed by coupling second random numbers (RNDb.sub.1, . . . , RNDb.sub.m) produced at the roamed network with the first random numbers (RNDa.sub.1, . . . , RNDan), by sending, from the mobile station to the roamed network, calculation results (SRESa.sub.1, . . . , SRESa.sub.n, SRESb.sub.1, . . . , SRESb.sub.

Abstract: A communication system includes a bidirectional tree network having a base end and a plurality of terminating ends, a central apparatus connected to the base end, a plurality of terminating equipment connected respectively to the terminating ends, and a plurality of subscriber terminals accommodated respectively in the terminating equipment. Each of the terminating equipment has a multiplexer for multiplexing information transmitted from the subscriber terminal accommodated therein to the central equipment, and a signal selection device for discriminating and selectively receiving only information which is destined for the subscriber terminal accommodated in this terminating equipment from information transmitted from the central apparatus to all the subscriber terminals via the tree network.

Abstract: A syndrome sequential decoding system for error correction of a convolutional code has a syndrome former for providing a syndrome sequence from a received sequence, a syndrome buffer memory for storing the syndrome sequence, an estimated error buffer memory for storing an estimated error sequence, a syndrome register for representing a syndrome state under searching, a comparator for testing if content of the syndrome register is all zero, and an algorithm controller. The algorithm controller controls the syndrome register, calculates a path metric and raises a flag in the estimated error buffer memory for showing an estimated error bit position. The syndrome sequential decoding system also includes an exclusive-OR circuit for correcting an information bit error according to the output of the estimated error buffer memory. When the content of the syndrome register is all zero, it shows that a currently searching path merges with the maximum likelihood path.

Abstract: A sintered silicon oxynitride composition comprises as an amount of starting material the combination of (a) a silicon component comprising silicon nitride(Si.sub.3 N.sub.4) and silicon oxide(SiO.sub.2) in a mol ratio of SiO.sub.2 /Si.sub.3 N.sub.4 being 0.7 to 1.2, and (b) at least one second component selected from an aluminum oxide, an aluminum nitride, a rare earth oxide, and a rare earth nitride, said second component being in an amount of from about 0.1 to 10 mol per 100 mol of said silicon component.

Abstract: A dental filling composite material is disclosed, which contains 10-99% by weight of phosphazene of the formula: ##STR1## in which at least one of R.sub.1 and R.sub.2 represent radicals having not less than 3 carbon atoms and being polymerizable.The filling composite material is low in polymerization shrinkage, thermal expansion coefficient and water absorption and may be quickly polymerized and cured to form a polymer of high compressive strength, flexural strength and hardness.