Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.

Abstract: An ultrasonic probe includes ultrasonic oscillating elements arranged in a two-dimensional array shape, connection leads connected to the ultrasonic oscillating elements, and at least one board to connect the ultrasonic oscillating elements and integrated circuits. The board includes a first part having through-holes which are electrically connected to the connection leads when the connection leads are inserted, and second parts having bendable portions configured to connect the first part and the integrated circuits.

Abstract: A spatial position x? of each ultrasonic transducer is accurately obtained for each probe in consideration of each edge transducer gap, and a delay time T(x?(n)) and a weighting coefficient W(x?(n)) are calculated on the basis of the position of each ultrasonic transducer. A control unit executes ultrasonic transmission/reception by using the calculated delay times and weighting coefficients to realize a suitable acoustic field with high deflection angle accuracy, small sidelobes, and the like as compared with the prior art.

Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.

Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.

Abstract: A network management system for managing a computer network in which media switching type infrastructures and media sharing type infrastructures are combined coexistently includes a database destined for network management in which correspondences established among information concerning physical interconnections of individual equipment on the network, information concerning logical network configuration such as that of virtual network, and information concerning the users who make use of the network are stored, identifying means for identification of the individual equipment on the network and physical addresses intrinsic to network ports, respectively, and retrieval means for searching information of the physical addresses of the network ports with queries for the logical addresses.

Abstract: A network management system for managing a computer network in which media switching type infrastructures and media sharing type infrastructures are combined coexistently includes a database destined for network management in which correspondences established among information concerning physical interconnections of individual equipment on the network, information concerning logical network configuration such as that of virtual network, and information concerning the users who make use of the network are stored, identifying devices for identification of the individual equipment on the network and physical addresses intrinsic to network ports, respectively, and retrieval engines for searching information of the physical addresses of the network ports with queries for the logical addresses.

Abstract: A network managing method which divides a network to be managed into a plurality of virtual closed area networks, and defines management information on the virtual closed area networks separately in a plurality of logical hierarchies. A virtual LAN/network space defines a connection state among closed area networks, a closed area space defines attribute information on nodes within a closed area network, and a virtual service defines logical arrangement information on nodes in the overall network. The management information is distributively stored in each node and utilized for MAC control. When the configuration of the network is changed due to movements of nodes, an administrator inputs the contents of the change from the manager of each layer, so that the manager communicates with a node containing corresponding management information to instruct the node to update management information.

Abstract: For realizing a system for uniformly operating and managing a network system capable of managing a plurality of types of logical networks for one network entity composed of a plurality of objects, information on network topologies is collected from each of the plurality of objects. Display data is created for each of a plurality of types of logical network topologies for each object in accordance with the collected information on network topologies. A control is conducted in accordance with the created display data so as to display a physical connection relationship, a logical connection relationship, and a virtual connection relationship on a virtual screen.

Abstract: A two-dimensional array ultrasonic probe comprises printed circuit boards, each carrying piezoelectric vibrators arranged in the form of a matrix and adapted to draw signal leads and grounding wires from the vibrators through the gaps separating the columns of the matrix. A row of vibrators are arranged in an array on each of the printed circuit boards and then the printed circuit boards carrying vibrators are arranged in the column to produce a two-dimensional array transducer.

Abstract: This invention relates to a method of manufacturing an ultrasonic transducer. A plurality of leads end portions are inserted into a plurality of lead holes of an alignment jig. A backing layer is formed by resin molding. After that, the alignment jig is removed from the surface of the backing layer, and the surface of the backing layer is flattened. Since the end portions of the leads are exposed to this flattened surface of the backing layer, discrete electrodes formed on the back surfaces of transducer elements are electrically connected to these lead end portions. The accuracy of lead arrangement is thus improved by the use of the alignment jig. This reduces alignment errors of leads with respect to the discrete electrodes of the transducer elements.

Abstract: A public key certificate generation method includes the steps of: sending a certificate issuing request including a registration contents of a public key certificate and an information content guaranteed by the registration authority, to the issuing authority in a registration authority and generating a public key certificate including the registration contents described in the certificate issuing request the information guaranteed by the registration authority issuing contents issued by the issuing authority, and a signature to the issuing contents in the issuing authority.

Abstract: A two-dimensional array ultrasonic probe comprises printed circuit boards, each carrying piezoelectric vibrators arranged in the form of a matrix and adapted to draw signal leads and grounding wires from the vibrators through the gaps separating the columns of the matrix. A row of vibrators are arranged in an array on each of the printed circuit boards and then the printed circuit boards carrying vibrators are arranged in the column to produce a two-dimensional array transducer.

Abstract: A time period which is expended since a request for the authentication of the validity of a public key certificate till the authentication of the validity, is shortened. A certificate validity authentication center VC periodically searches for and verifies paths which extend from a bridge certification authority CAbridge to individual terminal admitting certification authorities CA, and it registers the paths whose verifications have held good, in a path database in association with the respective terminal admitting certification authorities CA.

Abstract: A distributed object system comprising at least one object distributing server, at least one client terminal and at least one server object execution server according to the present invention, including: an object distributing server for storing an object program to which an electronic signature is affixed; a client terminal including means for down-loading the object program from the object distributing server, means for verifying the electronic signature affixed to the object program, means for executing the client object program when the completeness of the object program is confirmed and the user of the client terminal beforehand permits execution of the client object program which is electronically signed by a signatory, and means for transmitting the electronic signature affixed to the object program to a server object execution server; and a server object execution server including means for verifying the signature received, and means for supplying services to the user of the client terminal when the c

Abstract: This invention relates to a method of manufacturing an ultrasonic transducer. First, a plurality of printed boards in each of which a plurality of leads are formed in a line are stacked. The end portions of the leads protrude from each printed board. These lead end portions are inserted into a plurality of lead holes of an alignment jig. The plurality of printed boards are buried in the back surface of this alignment jig, and a backing layer is formed by resin molding. After that, the alignment jig is removed from the surface of the backing layer, and the surface of the backing layer is flattened. Since the end portions of the leads are exposed to this flattened surface of the backing layer, discrete electrodes formed on the back surfaces of transducer elements are electrically connected to these lead end portions. The accuracy of lead arrangement is thus improved by the use of the alignment jig. This reduces alignment errors of leads with respect to the discrete electrodes of the transducer elements.

Abstract: For realizing a system for uniformly operating and managing a network system capable of managing a plurality of types of logical networks for one network entity composed of a plurality of objects, information on network topologies is collected from each of the plurality of objects. Display data is created for each of a plurality of types of logical network topologies for each object in accordance with the collected information on network topologies. A control is conducted in accordance with the created display data so as to display a physical connection relationship, a logical connection relationship, and a virtual connection relationship on a virtual screen.

Abstract: This invention relates to a method of manufacturing an ultrasonic transducer. First, a plurality of printed boards in each of which a plurality of leads are formed in a line are stacked. The end portions of the leads protrude from each printed board. These lead end portions are inserted into a plurality of lead holes of an alignment jig. The plurality of printed boards are buried in the back surface of this alignment jig, and a backing layer is formed by resin molding. After that, the alignment jig is removed from the surface of the backing layer, and the surface of the backing layer is flattened. Since the end portions of the leads are exposed to this flattened surface of the backing layer, discrete electrodes formed on the back surfaces of transducer elements are electrically connected to these lead end portions. The accuracy of lead arrangement is thus improved by the use of the alignment jig. This reduces alignment errors of leads with respect to the discrete electrodes of the transducer elements.

Abstract: A network managing method which divides a network to be managed into a plurality of virtual closed area networks, and defines management information on the virtual closed area networks separately in a plurality of logical hierarchies. A virtual LAN/network space defines a connection state among closed area networks, a closed area space defines attribute information on nodes within a closed area network, and a virtual service defines logical arrangement information on nodes in the overall network. The management information is distributively stored in each node and utilized for communication control and so on. When the configuration of the network is changed due to movements of nodes and so on, an administrator inputs the contents of update from the manager of each layer, so that the manager communicates with a node containing corresponding management information to instruct the node to update the management information.

Abstract: An integrated network installation system which comprises an execution section having function specification means for specifying a network function of an information processor connected to a network, and preparation means for preparing installation data corresponding to the network function of the information processor specified by the specification means and a display section for connecting the information processor to the network based on the installation data from the execution section, and displaying it.