Abstract: A head mounted device includes a ring-shaped mount unit for mounting the head mounted device on a head of a user, the ring-shaped mount unit including a first housing having a band portion on each of both sides thereof and a second housing having an engagement portion to be engaged with the band portion, and the ring-shaped mount unit being formed in a ring shape that enables enlargement and reduction of a circumference thereof by engagement of the band portion with the engagement portion. The head mounted device further includes a circumference holding unit, such as a torque limiter, configured to generate a holding force at least in a circumference enlargement direction of the ring-shaped mount unit.

Abstract: A head mounted device includes a ring-shaped mount unit for mounting the head mounted device on a head of a user, the ring-shaped mount unit including a first housing having a band portion on each of both sides thereof and a second housing having an engagement portion to be engaged with the band portion, and the ring-shaped mount unit being formed in a ring shape that enables enlargement and reduction of a circumference thereof by engagement of the band portion with the engagement portion. The head mounted device further includes a circumference holding unit, such as a torque limiter, configured to generate a holding force at least in a circumference enlargement direction of the ring-shaped mount unit.

Abstract: A head mounted device includes a ring-shaped mount unit for mounting the head mounted device on a head of a user, the ring-shaped mount unit including a first housing having a band portion on each of both sides thereof and a second housing having an engagement portion to be engaged with the band portion, and the ring-shaped mount unit being formed in a ring shape that enables enlargement and reduction of a circumference thereof by engagement of the band portion with the engagement portion. The head mounted device further includes a circumference holding unit, such as a torque limiter, configured to generate a holding force at least in a circumference enlargement direction of the ring-shaped mount unit.

Abstract: An ocular optical system that guides light from a display element to an eye of an observer includes a first phase plate, a second phase plate, one or more lenses, and a polarization separation element configured to reflect first linearly polarized light and allow second linearly polarized light to pass therethrough in a polarization direction orthogonal to a polarization direction of the first linearly polarized light. The second phase plate is in contact with and held by a predetermined lens among the one or more lenses. The first phase plate has a shape that determines a phase. An outer shape of the predetermined lens is a rotationally symmetric shape. The second phase plate has a rotationally symmetric shaped portion and a non-rotationally symmetric shaped portion.

Abstract: A lens including ejector pin marks formed at contacting portions with ejector pins used in molding, with a first side including the ejector pin marks and a second side not including the ejector pin marks. The ejector pin marks are located outside of an optical effective diameter on the first side, and at least one of the ejector pin marks on the first side is located inside an optical effective diameter on the second side.

Abstract: A head mounted device to be mounted on a head of a user includes a display unit configured to display an image, a movable portion configured to be movable with the display unit in a vertical direction to eyes of the user when the head mounted device is mounted on the head of the user, an operation portion configured to be operable by the user, and a rotor configured to rotate by operation of the operation portion and to move the movable portion by the rotation.

Abstract: A head mounted device includes a ring-shaped mount unit for mounting the head mounted device on a head of a user, the ring-shaped mount unit including a first housing having a band portion on each of both sides thereof and a second housing having an engagement portion to be engaged with the band portion, and the ring-shaped mount unit being formed in a ring shape that enables enlargement and reduction of a circumference thereof by engagement of the band portion with the engagement portion. The head mounted device further includes a circumference holding unit, such as a torque limiter, configured to generate a holding force at least in a circumference enlargement direction of the ring-shaped mount unit.

Abstract: A method includes acquiring weather information relating to at least one of physical quantities including insolation, cloudiness, and humidity; performing a rating scale assessment of the weather information based on a predetermined threshold value; predicting an electrical output of a solar generator; performing a rating scale assessment of the electrical output of the solar generator based on a standard electrical output of the solar generator; and generating information indicating an assessment value obtained in the performing of the rating scale assessment of the weather information, and an assessment value obtained in the performing of the rating scale assessment of the electrical output.

Abstract: An evaluation value DS for evaluating responsiveness of a first node when no loads are being transferred, an evaluation value Dn for evaluating responsiveness of a path P connecting between the first and second nodes assuming that loads are being transferred, and an evaluation value Dr for evaluating responsiveness of the second node N2 assuming that the second node has received a load from the first node are calculated. Whether or not to transfer the load is determined depending upon comparison results of magnitude of DS and a sum of Dr+Dn.

Abstract: Provided a plurality of data nodes connected in a network, each including a data storage unit. The data node of data replication destination temporarily stores data to be updated in an intermediate data structure, and converts asynchronously with respect to the update request to a target data structure to store the converted data in the data storage unit. Based on access history information stored in an access history recording unit, trigger information, concerning timing for execution of conversion to the target data structure performed asynchronously by the data node is changed.

Abstract: Provided is a communication control apparatus including a communication quality examination unit and a discard rule generating unit. The communication quality examination is configured to examine communication quality information representing communication quality in a communication network system. The discard rule generating unit is configured to generate a discard rule used for discarding communication data in the communication network system on the basis of the communication quality information examined by the communication quality examination unit, system knowledge information including information relating to retransmission control with respect to communication data used for implementing a service to be provided in the communication network system, and operational policy information including a priority with respect to one or more of the services to be provided in the communication network system.

Abstract: A distributed storage system of the present invention includes a plurality of data nodes coupled via a network and respectively including data storage units. At least two of the data nodes hold in the respective data storage units thereof replicas of a plurality of types of data structures that are logically identical but are physically different between the data nodes.

Abstract: To increase the reliability of power supply control of a server group and reduce the power consumption of the server group.

Abstract: An application owned by an information processing device of any of a plurality of bases connected to each other via a network and each having an information processing device for operating the application by a virtual machine unit is, including the virtual machine unit, relocated to another base. The migration of the virtual machine unit that executes the application is controlled, the information processing device of the base that is a relocation destination is determined, and a base-by-base and application-by-application backup generation is grasped for each application. As bases for backing up data required to execute the application, information processing devices of a plurality of bases are selected, and the data is moved to each of the information processing devices and stored.

Abstract: An evaluation value DS for evaluating responsiveness of a first node when no loads are being transferred, an evaluation value Dn for evaluating responsiveness of a path P connecting between the first and second nodes assuming that loads are being transferred, and an evaluation value Dr for evaluating responsiveness of the second node N2 assuming that the second node has received a load from the first node are calculated. Whether or not to transfer the load is determined depending upon comparison results of magnitude of DS and a sum of Dr+Dn.

Abstract: A slave computer out of a plurality of slave computers that are connected to a plurality of clients through a front network and provide the front network with a single IP address that is a same IP address comprises: a responsible client table that indicates a client for which each of the plurality of slave computers is responsible; and an ARP processing unit that refers to the responsible client table when an ARP request for the single IP address has been received from one of the plurality of clients and sends an ARP response when a client that has sent the ARP request is present in the responsible client table, and otherwise does not send the ARP response, wherein a client in the responsible client table is added, changed, or deleted by a master computer connected through a back-end network.

Abstract: A system includes a processing history recording means that records history information of information processing performed by an information processing means on data, a plurality of information storing means that store information in mutually different information storage formats, and an information storage format control means that controls to changes an information storage format of data, on the basis of a history of information processing performed on the data.

Abstract: Provided a plurality of data nodes connected in a network, each including a data storage unit. The data node of data replication destination temporarily stores the-data to be updated in an intermediate data structure, and converts asynchronously with respect to the update request to a target data structure to store the converted data in the data storage unit. Based on access history information stored in an access history recording unit, trigger information, concerning timing for execution of conversion to the target data structure performed asynchronously by the data node is changed.

Abstract: To increase the reliability of power supply control of a server group and reduce the power consumption of the server group.

Abstract: A system has a data structure in which a value can be obtained from a key. In a write access, a first pair <Key,Hash(Value)> and a second pair <Hash(Value),Value> are stored respectively in a volatile storage device. The first pair <Key,Hash(Value)> is saved in a nonvolatile storage device before returning a response, and the second pair <Hash(Value),Value> is saved in the first storage device at any time with the second pair saved in the volatile storage device. In a read access in which a value is obtained from a key, it is determined that data is not stored normally if the second pair is not found in processing in which after obtaining the hash value of the value from the first pair, the second pair is read.