Abstract: A multi-stage screw compressor includes a plurality of stages of compressor bodies that compress a gas in sequence, and each stage of the plurality of stages of compressor bodies has both male and female rotors that are housed revolvably in a casing in a mutually meshing state. The male and female rotors each include a rotor lobe section having a suction-side end face and a discharge-side end face on one end and the other end thereof in the axial direction and having a twisted lobe extending from the suction-side end face to the discharge-side end face. The male and female rotors in a downstream-stage compressor body as at least one certain stage, excluding an upstream-stage compressor body as the first stage, among the plurality of stages of compressor bodies are each configured such that their lead increases from the suction side in the axial direction of the rotor lobe section toward the discharge side.

Abstract: A control device acquires quality information indicating a correspondence relationship between a position and communication quality related to wireless communication at the position, and route information indicating a movement route of a mobile base station, specifies an area in which the communication quality is determined to be lower than a predetermined communication quality based on the quality information, and executes control for moving the mobile base station to a position at which a wireless communication service can be provided in at least a part of the area in a case where the position is included in the movement route based on the route information.

Abstract: A system control device that transmits a manifest file describing information necessary for acquiring video data to a viewing client in a system that performs distribution of the video data via a network includes: generation means for generating the manifest file on the basis of at least one of identification information indicating a viewer attribute, a time zone, and a state of the system according to a prescribed control policy; and transmission means for transmitting the manifest file generated by the generation means to the viewing client.

Abstract: A quality information collecting system acquiring video data distributed in response to a viewing request and collecting quality-related information regarding video viewing from a viewing client playing back a video includes a quality information control functional unit configured to determine whether or not to request the viewing client having made a viewing request to report quality-related information, based on a network communication situation in which the video data is distributed, and a quality information collecting and analysis functional unit configured to receive, in accordance with a determination of the quality information control functional unit, the quality-related information transmitted from the viewing client.

Abstract: A system control device that transmits a manifest file describing information necessary for acquiring video data to a viewing client in a system that performs distribution of the video data via a network includes: generation means for generating the manifest file on the basis of at least one of identification information indicating a viewer attribute, a time zone, and a state of the system according to a prescribed control policy; and transmission means for transmitting the manifest file generated by the generation means to the viewing client.

Abstract: A quality information collecting system acquiring video data distributed in response to a viewing request and collecting quality-related information regarding video viewing from a viewing client playing back a video includes a quality information control functional unit configured to determine whether or not to request the viewing client having made a viewing request to report quality-related information, based on a network communication situation in which the video data is distributed, and a quality information collecting and analysis functional unit configured to receive, in accordance with a determination of the quality information control functional unit, the quality-related information transmitted from the viewing client.

Abstract: A resource allocation method includes splitting requirements into split requirements for each subsection of a physical network. The subsections of the physical network each have one of a plurality of policies applied to them. The method includes calculating a resource allocation for each of the subsections based on the split requirements, integrates a result of the allocations to determine a plurality of solutions candidates for resource allocations based on the split requirements, evaluates, for each solution candidate, compliance with the one of the plurality of policies, and selects one of the solution candidates based on the evaluation.

Abstract: Included are a communication quality requirement derivation unit that derives, for a specific service session between a server and a terminal, a communication quality requirement to be satisfied between the server and the terminal based on a requested quality of experience of the specific service session; a monitoring unit that monitors a communication quality of the specific service session between the server and the terminal; a determination unit that determines whether the communication quality of the specific service session satisfies the communication quality requirement derived for the specific service session; and a control unit that controls, when the communication quality of the specific service session does not satisfy the communication quality requirement derived for the specific service session, a communication route used for the specific service session between the server and the terminal so as to satisfy the communication quality requirement.

Abstract: A route calculation control device includes a calculator configured, among a plurality of nodes constituting a physical network having a plurality of sections to which respective policies different from each other are applied when allocating resources, based on a policy corresponding to a section including a start point node specified in a use request of the resources of the physical network, to calculate a route from the start point node to an end point node specified in the use request; and a controller configured to replace the start point node, among nodes constituting the route calculated by the calculator, with a first node included in a section different from the section including the start point node, so as to cause the calculator to calculate a route to the end point node. This enables to allocate resources to a network that includes multiple sections to which different policies are applied.

Abstract: A resource allocation device is provided that, responsive to a use request for resources of a network, the use request having a pair of nodes as terminal points designated among a plurality of nodes constituting the network, searches for one or more candidate paths between the terminal points, with which amounts of the resources related to the use request can be allocated, in a state where the resources that have been allocated to one or more other use requests are set aside from the network. The device calculates, for each of the one or more searched-for-candidate paths, in a state where the resources are allocated to the candidate path, a maximum number of paths that can be allocated between the terminal points of a virtual path related to the service, and selects the candidate path with which a sum total of the maximum numbers of paths becomes greatest.

Abstract: Steps include splitting requirements related to use of resources of a physical network into split requirements for each of the subsections; calculating, for each of the subsections, a resource allocation that satisfies the split requirements for the subsection according to the policy applied to the subsection; integrating results of the resource allocations, to calculate multiple solution candidates for a resource allocation that satisfies the requirements for the physical network; calculating, for each of the solution candidates, for each of the subsections, a first evaluation value representing a degree to what extent the resource allocation by the solution candidate in the subsection conforms to the policy applied to the subsection; and calculating a second evaluation value obtained by giving weights to the first evaluation values calculated for the respective subsections for each of the solution candidates according to importance of the policies applied to the respective subsections, and scalarizing the w

Abstract: A route calculation control device includes a calculator configured, among a plurality of nodes constituting a physical network having a plurality of sections to which respective policies different from each other are applied when allocating resources, based on a policy corresponding to a section including a start point node specified in a use request of the resources of the physical network, to calculate a route from the start point node to an end point node specified in the use request; and a controller configured to replace the start point node, among nodes constituting the route calculated by the calculator, with a first node included in a section different from the section including the start point node, so as to cause the calculator to calculate a route to the end point node. This enables to allocate resources to a network that includes multiple sections to which different policies are applied.

Abstract: To make it possible to easily change a writing line width. A ballpoint pen chip that brings a front half part side of a transfer ball into contact with an inward annular protrusion on a front end side in a chip body from a backward side of the inward annular protrusion and receives a rear half part side of the transfer ball with a front end part of a receiving member. The receiving member includes, on a front end side thereof, a reduction part gradually reduced in a cross-sectional area forward. A front-most end part of the reduction part is disposed backward from the transfer ball. A portion of the receiving member further on a rear side than the reduction part is unretreatably fixed to the chip body and configured to elastically contract when a pressing force is received from the transfer ball.

Abstract: A resource allocation device includes a searcher configured, in response to a use request for resources of a physical network, the use request having a pair of nodes as terminal points designated among a plurality of nodes constituting the physical network, to search for one or more candidate paths between the terminal points, with which amounts of the resources related to the use request can be allocated, in a state where the resources that have already been allocated to one or more other use requests are set aside from the physical network; a calculator configured to calculate, for each of the one or more searched-for candidate paths, in a state where the resources are allocated to the candidate path, for each of the one or more other existing use requests to which the resources have already been allocated, a maximum number of paths that can be allocated between the terminal points related to the use request; and a selector configured to select the candidate path with which a sum total of the maximum number

Abstract: To make it possible to easily change a writing line width. A ballpoint pen chip that brings a front half part side of a transfer ball into contact with an inward annular protrusion on a front end side in a chip body from a backward side of the inward annular protrusion and receives a rear half part side of the transfer ball with a front end part of a receiving member. The receiving member includes, on a front end side thereof, a reduction part gradually reduced in a cross-sectional area forward. A front-most end part of the reduction part is disposed backward from the transfer ball. A portion of the receiving member further on a rear side than the reduction part is unretreatably fixed to the chip body and configured to elastically contract when a pressing force is received from the transfer ball.

Abstract: A digest view system includes an information providing server and a recording/reproducing device. The information providing server includes a segment information DB for storing segment information for identifying segments contained in the content digest. When performing a digest view, the recording/reproducing device acquires the segment information and creates digest data on the content recorded. In the recording/reproducing device, the digest data is corrected according to view support information for inserting an explanation screen acquired from the view support information DB of the information providing server, thus improving the quality of view of the segment contained in the digest.

Abstract: Disclosed is an information distribution system in which a receiving terminal installed in a mobile object can reliably receive high quality distribution information from the beginning. The information distribution system comprises data transmission units, each for transmitting a plurality of data signals including same distribution information using a plurality of different radio channels with sequentially delaying the transmission start time of the data signals; an auxiliary transmission unit for transmitting signals according to communication status of the data transmission units; a communication control unit for controlling the auxiliary transmission unit and the data transmission units; and detection means for detecting the velocity control information for the mobile object. A receiving terminal for receiving the data signals transmitted from the data transmission units is installed on the mobile object.

Abstract: Disclosed is an information distribution system capable of distributing high quality data without lowering throughput of a network even in a communication area where many movable bodies could be traveling. The information distribution system comprises a radio transmission unit for transmitting data signals at a transmission rate being variable; a detection unit for detecting speed control information for a mobile object having a receiver for receiving data signals transmitted without wires from the radio transmission unit; and a transmission rate setting unit for changing the transmission rate of the data signals according to the speed control information.

Abstract: Disclosed is an information distribution system in which a receiving terminal installed in a mobile object can reliably receive high quality distribution information from the beginning. The information distribution system comprises data transmission units, each for transmitting a plurality of data signals including same distribution information using a plurality of different radio channels with sequentially delaying the transmission start time of the data signals; an auxiliary transmission unit for transmitting signals according to communication status of the data transmission units; a communication control unit for controlling the auxiliary transmission unit and the data transmission units; and detection means for detecting the velocity control information for the mobile object. A receiving terminal for receiving the data signals transmitted from the data transmission units is installed on the mobile object.

Abstract: The MOS field-effect transistor aims to enhance the electron mobility and the hole mobility in the channel portion by employing the strained-Si/SiGe (or Si/SiGeC) structure. Crystallinity of such a heterostructure is maintained in a preferable state, shortening of the effective channel length is prevented, diffusion of Ge is prevented and the resistance of the source layer and the drain layer is reduced. The channel region has a layered structure formed by stacking the Si layer and, the SiGe or SiGeC layer in order from the surface. The source layer and the drain layer formed of SiGe or SiGeC including high concentration impurity atoms providing a desired conduction type, are in contact with both end surfaces of the channel region. The surfaces of the source layer and the drain layer have a shape rising upwardly from the bottom portion of the gate electrode.