Abstract: Provided are a communication cable that includes a resin composition formed by adding a halogenated flame retardant and a flame retardant auxiliary to an olefin-based polymer and is excellent in stability of the communication properties and heat resistance, a wire harness that includes such a communication cable, and a manufacturing method according to which such a communication cable can be manufactured with high productivity. A communication cable 1 includes a signal wire 10 constituted by a pair of insulated wires 11 each having a conductor 12 and an insulating coating 13 covering the outer circumference of the conductor 12, and an insulating external layer 20 covering the outer circumference of the signal wire 10. The characteristic impedance is within a range of 100±10?.

Abstract: A communication electric wire 1 includes: a conductor 2; an insulating layer 3 covering an outer periphery of the conductor 2; and a magnetic sheath layer 8 covering an outside of the insulating layer 3, wherein the magnetic sheath layer 8 contains an organic polymer and a magnetic material, the magnetic sheath layer 8 contains 15 parts by mass or more of an acid-modified polymer in 100 parts by mass of the entire organic polymer, and the magnetic material is composed of particles with an average particle diameter of 50 ?m or less, and a content of the magnetic material in the magnetic sheath layer 8 is 300 parts by mass or more with respect to 100 parts by mass of the entire organic polymer.

Abstract: A quartz glass plate has a quartz glass plate body and a quartz glass member adhered to the quartz glass plate body through an adhesive layer, where the adhesive layer contains silica, and a sum of concentrations of Li, Na, and K ions, being alkali metal ions and Ca ions, being alkaline earth metal ions contained in the adhesive layer is 10 ppm by mass or less. Consequently, a step with a uniform thickness can be formed, and a quartz glass plate is not easily damaged by irradiation with a light containing an ultraviolet ray.

Abstract: A communication cable 1 is provided with a conductor 2, an insulation layer 3 containing an organic polymer and covering an outer periphery of the conductor 2, a metal foil 5 for covering an outer periphery of the insulation layer 3, and a magnetic sheath layer 7 containing an organic polymer and a powdered magnetic material and covering an outer periphery of the metal foil 5. A tensile modulus of elasticity of the magnetic sheath layer 7 is lower than that of the insulation layer 3. Assuming that an organic polymer having a melting point of 100° C. or lower is a low melting point polymer and a mass ratio of the low melting point polymer to organic polymer components constituting each layer is a low melting point component ratio, the low melting point component ratio is larger in the magnetic sheath layer 7 than in the insulation layer 3.

Abstract: A communication cable includes a coating layer that contains a powdery magnetic material and that can suppress the occurrence of a powdery substance containing the magnetic material when processing the coating layer. The communication cable further includes a conductor, an insulating coating that covers an outer circumstance of the conductor, and a magnetic sheath layer that covers an outer side of the insulating coating, and the magnetic sheath layer contains the magnetic material and the magnetic material has a particle shape with an average particle diameter of not more than 50 ?m and an aspect ratio of not greater than 4.

Abstract: A communication cable 1 includes a conductor 11 for transmitting electric signals and an outer layer 15 that is disposed outside the conductor 11 and contains an organic polymer. The communication cable 1 has at least one of a first form in which the outer layer 15 contains a chloride-forming flame retardant capable of forming a chloride and a second form in which an inner layer 13 containing an organic polymer and a chloride-forming flame retardant capable of forming a chloride is further provided between the outer layer 15 and the conductor 11. The outer layer 15 contains a first organic polymer and a second organic polymer having a higher tensile modulus than the first organic polymer, and the overall organic polymer component constituting the outer layer 15 has a tensile modulus of at least 100 MPa.

Abstract: It is aimed to provide a communication cable which includes a solid sheath on an outer periphery of a signal cable having a plurality of insulated wires and in which transmission characteristics hardly decrease due to a pressure in extrusion-molding a sheath. A communication cable 1 is provided with a signal cable 10 including a plurality of insulated wires 11 each having a conductor 12 and an insulation coating 13 covering an outer periphery of the conductor 12, and a solid sheath 20 covering an outer periphery of the signal cable 10. A melt flow rate of a constituent material of the sheath 20 measured at 200° and with a load of 2.16 kg is 0.25 g/10 min. or more.

Abstract: Provided is a communication cable provided with a coating layer that contains a powdery magnetic material and that can suppress the occurrence of a powdery substance containing the magnetic material when processing the coating layer. A communication cable 1 includes a conductor 2, an insulating coating 3 that covers an outer circumstance of the conductor 2, and a magnetic sheath layer 8 that covers an outer side of the insulating coating 3, and the magnetic sheath layer 8 contains the magnetic material and the magnetic material has a particle shape with an average particle diameter of not more than 50 ?m and an aspect ratio of not greater than 4.

Abstract: A bandwidth allocation device is included in a communication system having a terminal station device and a terminal device and relaying upstream data, which is received from a communication terminal by a lower device connected to the terminal device, to an upper device connected to the terminal station device. The bandwidth allocation device includes a transmission-permitted period start position determining unit configured to estimate a start position of an arrival period in which the upstream data arrives at the terminal device from the lower device; a transmission-permitted period length determining unit configured to estimate a length of the arrival period based on an amount of upstream data to be transmitted from the lower device to the terminal device; and a bandwidth allocation unit configured to allocate a bandwidth to the terminal device based on the estimated start position and the estimated length of the arrival period.

Abstract: A shielded communication cable. The shielded communication cable includes a pair of insulated wires twisted with each other containing a conductor and an insulation covering which covers the conductor and has the relative dielectric constant of 2.5 or lower, a braided shield which covers the pair of insulated wires, a film-shaped shield which contains a metal film and longitudinally laps the pair of the insulated wires over the braided shield and a jacket having an inner diameter of 3.5 mm or smaller which covers the film-shaped shield. The pair of insulated wires are twisted with each other with a twist pitch of 30 times of an outer diameter of each of the insulated wires or smaller, and the shielded communication cable has a characteristic impedance in range of 100±5?.

Abstract: A bandwidth allocation apparatus includes: a traffic starting position detection unit that detects a start timing of burst traffic on the basis of the traffic information; a traffic information extraction unit that extracts information on a traffic amount of each of a plurality of traffic allocation periods from the traffic information extracted for each lower-level apparatus; a traffic amount estimation unit that calculates an average value of the traffic amount in the traffic allocation periods on the basis of the information on the traffic amount that the traffic information extraction unit has extracted for each lower-level apparatus; and a bandwidth allocation unit that allocates a first bandwidth which is an allocation bandwidth based on the average value calculated by the traffic amount estimation unit to the terminating apparatus from the start timing detected by the traffic starting position detection unit.

Abstract: A bandwidth allocation device is included in a communication system having a terminal station device and a terminal device and relaying upstream data, which is received from a communication terminal by a lower device connected to the terminal device, to an upper device connected to the terminal station device. The bandwidth allocation device includes a transmission-permitted period start position determining unit configured to estimate a start position of an arrival period in which the upstream data arrives at the terminal device from the lower device; a transmission-permitted period length determining unit configured to estimate a length of the arrival period based on an amount of upstream data to be transmitted from the lower device to the terminal device; and a bandwidth allocation unit configured to allocate a bandwidth to the terminal device based on the estimated start position and the estimated length of the arrival period.

Abstract: An optical transmission system includes ground stations; optical-terminating devices; a traffic-monitoring unit that detects a traffic amount of the uplink signal transmitted in a time-division multiplexing manner for each of the optical-terminating devices; and a bandwidth allocation calculation unit that estimates one optical-terminating device of the optical-terminating devices connected to one ground station of the ground stations having a cell where the moving object is positioned on the basis of the traffic amount, and calculates a first allocation amount of a bandwidth allocated to the uplink signal of the one optical-terminating device connected to the one ground station having the cell where the moving object is positioned and a second allocation amount of a bandwidth allocated to the uplink signal of another optical-terminating device of the optical-terminating devices connected to another ground station of the ground stations having a cell adjacent to the cell where the moving object is positioned.

Abstract: An optical transmission system includes ground stations; optical-terminating devices; a traffic-monitoring unit that detects a traffic amount of the uplink signal transmitted in a time-division multiplexing manner for each of the optical-terminating devices; and a bandwidth allocation calculation unit that estimates one optical-terminating device of the optical-terminating devices connected to one ground station of the ground stations having a cell where the moving object is positioned on the basis of the traffic amount, and calculates a first allocation amount of a bandwidth allocated to the uplink signal of the one optical-terminating device connected to the one ground station having the cell where the moving object is positioned and a second allocation amount of a bandwidth allocated to the uplink signal of another optical-terminating device of the optical-terminating devices connected to another ground station of the ground stations having a cell adjacent to the cell where the moving object is positioned.

Abstract: A bandwidth allocation apparatus includes: a traffic starting position detection unit that detects a start timing of burst traffic on the basis of the traffic information; a traffic information extraction unit that extracts information on a traffic amount of each of a plurality of traffic allocation periods from the traffic information extracted for each lower-level apparatus; a traffic amount estimation unit that calculates an average value of the traffic amount in the traffic allocation periods on the basis of the information on the traffic amount that the traffic information extraction unit has extracted for each lower-level apparatus; and a bandwidth allocation unit that allocates a first bandwidth which is an allocation bandwidth based on the average value calculated by the traffic amount estimation unit to the terminating apparatus from the start timing detected by the traffic starting position detection unit.

Abstract: A high-performance bed apparatus is provided. The bed apparatus includes a supporting unit that supports a user, and a control unit that controls an operation of the supporting unit, wherein a speed of the operation of the supporting unit in a case where the user manipulates the supporting unit is higher than a speed at which the control unit automatically causes the supporting unit to operate.

Abstract: An optical transmission device includes a bandwidth allocator that periodically reads bandwidth request information indicating a bandwidth required for a termination device to transmit an uplink signal from a storage and allocates a bandwidth to the termination device on the basis of the read bandwidth request information, and a timing adjuster that adjusts a period at intervals of which the bandwidth allocator reads the bandwidth request information from the storage on the basis of the timing at which resource information used to generate the bandwidth request information is received from an upper device.

Abstract: A composition for a wire coating material containing a silane-crosslinked polyolefin which is excellent in flame-retardancy, fusion resistance, and heat-deformation resistance, and an insulated wire and a wiring harness coating the composition. A composition for a wire coating material contains (A) a silane-grafted polyolefin which is a polyolefin graft-modified with a silane coupling agent, (B) an unmodified polyolefin, (C) a modified polyolefin having one or more functional groups selected from the group consisting of a carboxy group, an ester group, an acid anhydride group, an amino group, and an epoxy group, (D) a flame retardant, and (E) a crosslinking catalyst. The polyolefin of (A) the silane-grafted polyolefin has a density of 0.855 to 0.890 g/cm3 in an ungrafted state and has a melting point of 80° C. or higher, and the unmodified polyolefin has a density of 0.855 to 0.950 g/cm3.

Abstract: Information on allocation of a bandwidth of uplink communication of each of user devices is extracted from information notified from an upper-level device on the uplink communication of the user devices. Correspondence information is created to indicate a correspondence among the upper-level device, the terminal device, the lower-level device, and the user device. A start time point of the uplink communication of the terminal device and an information amount of signals for which transmission of the uplink communication of the terminal device is allowed are allocated to the terminal device on the basis of the information on allocation of the bandwidth of the uplink communication of each of the user devices and the correspondence information.

Abstract: A bed apparatus including, at least, two drivers or a first driver and a second driver, the first driver being in linkage with the second driver, comprises: a calculating means for calculating a calculated bed state value, based on the first driver and the second driver; an error detecting means for detecting error between the calculated bed state value and a designated bed state value designated by the user; and, an error correcting means for correcting the detected error when an error is detected by the error detecting means. As a result, it is possible to provide a bed apparatus that can coincide the designated state of the bed apparatus with the actual state of the bed apparatus by appropriately correcting the error between the drivers.