Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.

Abstract: A molded body, comprising a foamed portion in which a skin layer A, a foamed layer and a skin layer B are disposed in this order in a thickness direction, wherein in the foamed portion, the foamed layer has a ratio of thickness, with respect to a total thickness of the skin layer A, the foamed layer and the skin layer B, of from 73% to 88%.

Abstract: In a local information broadcast system according to the present invention, a content distribution center distributes broadcast contents of local information to broadcast devices arranged in a service area via a master station. Each of the broadcast devices receives the distributed contents by a communication unit, stores the contents in a storage unit and cyclically outputs the stored contents by an output unit, converts the contents into broadcast signals in a transmission system of a digital broadcast and broadcasts the broadcast signals to the service area by a transmission unit, and provides a receiving terminal capable of receiving digital broadcast in the service area of the local information.

Abstract: A management apparatus includes a collector configured to collect requests of events of which the distribution is required via the network from users of the plurality of terminals, a list generator configured to aggregate the collected requests for each event to generate a list, a disclosure unit configured to disclose the list on a site on the network for a predetermined period, a reception unit configured to receive a request for distributions from a plurality of content distributors via the site for each content included in the list, a selector configured to select a content distributor to which a distribution right is granted from among the plurality of content distributors for each content included in the list based on a predetermined conditions, and a reporter configured to report a selection result by the selector to content distributor with the distribution right granted thereto.

Abstract: A management apparatus includes a collector configured to collect requests of events of which the distribution is required via the network from users of the plurality of terminals, a list generator configured to aggregate the collected requests for each event to generate a list, a disclosure unit configured to disclose the list on a site on the network for a predetermined period, a reception unit configured to receive a request for distributions from a plurality of content distributors via the site for each content included in the list, a selector configured to select a content distributor to which a distribution right is granted from among the plurality of content distributors for each content included in the list based on a predetermined conditions, and a reporter configured to report a selection result by the selector to content distributor with the distribution right granted thereto.

Abstract: In a local information broadcast system according to the present invention, a content distribution center distributes broadcast contents of local information to broadcast devices arranged in a service area via a master station. Each of the broadcast devices receives the distributed contents by a communication unit, stores the contents in a storage unit and cyclically outputs the stored contents by an output unit, converts the contents into broadcast signals in a transmission system of a digital broadcast and broadcasts the broadcast signals to the service area by a transmission unit, and provides a receiving terminal capable of receiving digital broadcast in the service area of the local information.

Abstract: A wireless network system comprising a master station, a plurality of slave stations, the master station and the plurality of slave station being connected in a star shape through an outbound wireless line having a predetermined first transmission band area and a plurality of inbound wireless lines having a second transmission band area narrower than the outbound wireless line, a determination section for determining whether a time-division multiplex transmission method is suitable or a broadcast transmission method is suitable for the outbound transmission method in accordance with the system application at a time of transmitting the outbound data in correspondence to a desired system application to the plurality of slave stations from the master station through the outbound wireless line, and an outbound line control section for setting a transmission path corresponding to the outbound transmission method determined to be suitable by the determination section on the outbound wireless line between the master