摘要:
An object of the invention is to obtain a high-speed and high-accuracy radio-wave propagation characteristic forecasting system in combination with the launching method by correctly estimating a diffraction phenomenon when a ray passes the vicinity of an edge of a structure. To estimate a radio-wave propagation characteristic in accordance with the ray launching method, when a ray passes the vicinity of an edge of a structure, a diffracted wave is generated at the edge if the distance between the edge and the ray is smaller than the radius of a ray spread. Thereby, it is easy to combine the ray launching method with the conventional ray launching method and it is possible to estimate a high-speed high-accuracy radio-wave propagation characteristic also considering a ray diffracted wave.
摘要:
A tool for an optical connector including a clamping portion for clamping an optical fiber between clamping elements, the tool including: first and second insertion members, respectively including separately extractable first and second distal ends, wherein the first and second distal ends maintain the clamping elements in an open state by being wedged therebetween from outside the clamping portion, so that the optical fiber is movable between the clamping elements; first and second insertion member operating portions, respectively separately connected to proximal ends of the first and second insertion members, that individually extract the first and second distal ends of the first and second insertion members from between the clamping elements; and a stopper portion against which the optical connector is pressed when the first and second insertion members are extracted from between the clamping elements.
摘要:
In case a fault has occurred in a volume, it was so far difficult to correctly notify a fault by using a host computer which can access the volumes managed by a management computer that integrally manages a plurality of devices constituting a network. The management program of the invention is executed by the management computer connected to computers and to a plurality of storage devices for managing the volumes connected to the computers through a SAN (storage area network). The management program executes a procedure for receiving a notice of fault in the volume from the storage devices, a procedure for receiving volume access control information from a plurality of storage devices for specifying the computers that can access the volumes, and a procedure for notifying the fault in the volume to the computers that are permitted to access the volumes based on the volume access control information.
摘要:
An optical connector cleaning tool includes a tool body, a driving mechanism that moves a cleaning member, an insertion portion that protrudes from the tool body, with a cleaning member disposed at the projected distal end from the tool body and able, by insertion in a connector housing, to cause the portion of the cleaning member disposed at the projected distal end to abut against the connection end face of the optical connector housed in the connector housing, and a connector cleaning guide that positions an optical connector outside the connector housing and the insertion portion and causes the cleaning member and the connection end face of the optical connector to abut, a connector cleaning guide having a first port in which the optical connector can be inserted and a second port in which the insertion portion can be inserted.
摘要:
A managing computer is connected to object computers, the managing computer being connected to the object computers and the storage which is connected to the object computers for managing the object computers and the storage. The managing computer includes an interface for receiving volume managing information relating to storage areas in the storage, file sharing information relating to file sharing in the storage which is provided by the object computers and storage managing information relating to the storage, and a control unit which specifies the object computers or the storage to be preset controlled according to the volume managing information, the file sharing information and the storage managing information for managing the object computers and the storage by instructing the specified object computers or the specified storage to carry out the preset control.
摘要:
An optical fiber connecting tool for an optical connector which houses a ferule, a first optical fiber mounted in the ferule and extending from a back end of the ferule, and a second optical fiber abutted and connected to the first optical fiber. The optical connector includes a clamping portion, provided at a back portion of the ferule opposite to a distal end surface for abutment connection and having half split elements, for maintaining connection between the first optical fiber and the second optical fiber by clamping the first optical fiber and the second optical fiber in a space between the half split elements using elastic force of a spring. The optical fiber connecting tool includes an insertion member for maintaining a state in which the second optical fiber is insertable into and removable from the space between the half split elements by being wedged into the space from outside of the clamping portion so as to expand the space between the half split elements, and an insertion member operating portion, having a ring shape, for extracting the insertion member disposed between the half split elements of the clamping portion from the clamping portion.
摘要:
When a file server migrates from an existing file server to a new file server, data is allowed to migrate and setting information for a file system can migrate, too. At this time, data migration timing can be arbitrarily designated while a file sharing service is executed without stop and while securing system performance. A file migration program of the new file server is connected in a block level to a volume of the existing file server to acquire file sharing configuration and volume setting information of the existing file server. During the migration of the file server, a file read/write request from the file sharing access program of the host computer is executed for the volume through the block access program of the existing file server on the basis of file sharing configuration and volume setting information of the existing file server so acquired.
摘要:
The IDs of a computer to be used for setting a storage controller are acquired and managed. An ID collection and management apparatus manages the IDs of the computer for a computer system comprising a storage volume assigned for storing data, at least one computer provided with a data port which reads or writs data in the storage volume, and a storage controller which controls the communications between the computer and the storage volume. The ID collection and management apparatus acquires an ID-A or the ID of the computer from the data port and an ID-B or the ID of the computer from the storage controller, and manages the corresponding relation between the ID-A and the ID-B for each computer.
摘要:
An optical fiber connecting tool for an optical connector which houses a ferule, a first optical fiber mounted in the ferule and extending from a back end of the ferule, and a second optical fiber abutted and connected to the first optical fiber. the optical connector includes a clamping portion, provided at a back portion of the ferule opposite to a distal end surface for abutment connection and having half split elements, for maintaining connection between the first optical fiber and the second optical fiber by clamping the first optical fiber and the second optical fiber in a space between the half split elements using elastic force of a spring. The optical fiber connecting tool includes an insertion member for maintaining a state in which the second optical fiber is insertable into and removable from the space between the half split elements by being wedged into the space from outside of the clamping portion so as to expand the space between the half split elements, and an insertion member operating portion, having a ring shape, for extracting the insertion member disposed between the half split elements of the clamping portion from the clamping portion.
摘要:
To shorten a required estimation time while keeping an estimation precision in an object environment given for estimating propagation characteristics with a ray launching method. In the case where a ray is propagated within a given observation area, and collides with a barrier residing on its path, a space in the vicinity of the ray is divided into a plurality of partial spaces until a predetermined condition is satisfied. The space in the vicinity of the ray that is considered to cause a degradation in the estimation precision is divided in reflection until there is less influence of degradation, whereby each of the subdivided partial spaces can be handled individually, so that the estimation precision of radio wave propagation characteristics can be made better than a conventional method. On the other hand, in the case where there is possibly less influence of degradation in the estimation precision, the space is not divided, whereby if a ray is radiated from a transmitting antenna coarsely, the total number of rays is reduced below that of the conventional method, so that a total calculation time taken for a propagation estimation can be shortened.