Abstract: A health assessment apparatus assesses health of a vehicle composition made up of a plurality of nodes. An instrument assessment unit calculates a health assessment value representing health for a terminal node among the plurality of nodes, the terminal node being a node for which there is no lower node to depend on. A composition assessment unit (303) obtains dependency information in which dependencies between the plurality of nodes are set from a dependency database (332). For an assessment target node, a composition health estimation unit (331) of the composition assessment unit (303) dynamically determines an integration process to integrate a health assessment value of the lower node in accordance with a relationship of magnitude between the health assessment value of the lower node and each of a plurality of thresholds, and calculates a health assessment value (31) of the assessment target node through the dynamically determined integration process.

Abstract: A long-period vibration sensor includes an overdamped accelerometer including a magnet fixed to the inside of a casing, a detection coil disposed between magnetic poles formed due to the magnet, a bobbin configured to hold the detection coil, and a support spring configured to support the bobbin in the casing so that the bobbin can vibrate in a predetermined direction, a voltage being outputted from the detection coil when the bobbin is damped, a plurality of digital filters having different frequency characteristics from one another, a selection module configured to select one digital filter from the plurality of digital filters based on an output value of the voltage outputted from the overdamped accelerometer, and a correction module configured to correct the output value of the voltage outputted from the overdamped accelerometer using the digital filter selected by the selection module.

Abstract: A long-period vibration sensor includes an overdamped accelerometer including a magnet fixed to the inside of a casing, a detection coil disposed between magnetic poles formed due to the magnet, a bobbin configured to hold the detection coil, and a support spring configured to support the bobbin in the casing so that the bobbin can vibrate in a predetermined direction, a voltage being outputted from the detection coil when the bobbin is damped, a plurality of digital filters having different frequency characteristics from one another, a selection module configured to select one digital filter from the plurality of digital filters based on an output value of the voltage outputted from the overdamped accelerometer, and a correction module configured to correct the output value of the voltage outputted from the overdamped accelerometer using the digital filter selected by the selection module.

Abstract: A movable plate is provided to a pendulum displaceable by external vibration. A fixed plate is provided to a position opposite to the movable plate. A displacement detector detects an electrostatic capacitance between the plates. A servo amplifier supplies to a force coil, a current in an amount associated with the detection result. A current circuit and a load resistor of the force coil convert the current into a detection signal and output the signal. When the movable plate and the fixed plates, which are conducted to each other, are contacted, the electrostatic capacitance between the plates is removed. A processor detects a change in the detection signal due to the removal of the electrostatic capacitance, and then determines that the plates are contacted.

Abstract: A movable plate is provided to a pendulum displaceable by external vibration. A fixed plate is provided to a position opposite to the movable plate. A displacement detector detects an electrostatic capacitance between the plates. A servo amplifier supplies to a force coil, a current in an amount associated with the detection result. A current circuit and a load resistor of the force coil convert the current into a detection signal and output the signal. When the movable plate and the fixed plates, which are conducted to each other, are contacted, the electrostatic capacitance between the plates is removed. A processor detects a change in the detection signal due to the removal of the electrostatic capacitance, and then determines that the plates are contacted.

Abstract: A hardness testing apparatus comprises a sample table mounting a sample thereon, a loading arm having an indentor at its free end, a loading arm operation controlling unit, an electromagnetic brake. When the same is elevated and brought into contact with the indentor, the loading arm is moved upwardly. The loading arm operation controlling unit calculates a predetermined force to be applied to the sample in response to a displacement from a reference position of the loading arm when and after the sample is brought into contact with the indentor. The loading arm is moved upwardly such that a predetermined force calculated by the loading arm operating controlling unit is applied to the sample. The electromagnetic brake controls an elevating operation of the sample table. A direction of a current supplied to the electromagnetic brake is inverted at a predetermined timing.

Abstract: A hardness testing apparatus comprises a sample table mounting a sample thereon, a loading arm having an indentor at its free end, a loading arm operation controlling unit, an electromagnetic brake. When the sample is elevated and brought into contact with the indentor, the loading arm is moved upwardly. The loading arm operation controlling unit calculates a predetermined force to be applied to the sample in response to a displacement from a reference position of the loading arm when and after the sample is brought into contact with the indentor. The loading arm is moved upwardly such that a predetermined force calculated by the loading arm operating controlling unit is applied to the sample. The electromagnetic brake controls an elevating operation of the sample table. A direction of a current supplied to the electromagnetic brake is inverted at a predetermined timing.

Abstract: A novel halogenated polybutadiene series elastomer is produced by reacting a polybutadiene series elastomer with a particular active halogen group-containing compound in the presence of a particular organic halogenating agent. The resulting halogenated polybutadiene series elastomer can be subjected to heat-resistant crosslinking with a particular polyvalent amine, and is suitable for the preparation of rubber compositions for tire requiring the heat resistance.

Abstract: Two vulcanizates are adhered to each other by (I) applying a particular rubber cement composition to surfaces of the vulcanizates to be adhered and drying it; and (II) sandwiching an unvulcanized rubber sheet of a particular cushion rubber composition between the applied surfaces of the vulcanizates and fulcanizing them at a temperature of 0.degree.-100.degree. C. under pressure.

Abstract: A styrene-butadiene copolymer having a high styrene content is disclosed, which is obtained by polymerizing styrene and butadiene in a hydrocarbon solvent in the presence of an organolithium compound and, if necessary, a Lewis base and then coupling with a tin halide compound. This copolymer contains in its main chain at least 30 wt % of polymer having a tin-carbon bond and has a bound styrene content of more than 25 wt % but not more than 60 wt % and a content of vinyl bond in butadiene portion of not less than 30% but less than 50%.

Abstract: Rubber compositions for tires having low rolling resistance and excellent running stability consist mainly of a rubber blend consisting of 10-90% by weight of a high vinyl amorphous butadiene-styrene copolymeric rubber obtained by copolymerizing styrene with 1,3-butadiene and containing 3-30% by weight of bonded styrene and not less than 60% by weight of 1,2-bond in butadiene unit, and 90-10% by weight of a dienic rubber having a glass transition temperature of lower than -60.degree. C.

Abstract: A pneumatic radial tire having sidewalls, the rubber composition of said sidewalls comprising, based on 100 parts by weight of rubber, 20 to 90 parts by weight of butadienepiperylene copolymer and 80 to 10 parts by weight of at least one rubbery diene polymer selected from the group consisting of natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, butadiene-styrene copolymer rubber, ethylenepropylene-diene ternary copolymer rubber and acrylonitrile-butadiene copolymer rubber.

Abstract: A rubber composition adapted to be used as a tread rubber is disclosed. The rubber composition has remarkably improved resistance against heat generation, breakage resistance, wear resistance, wet skid resistance and low-temperature brittleness, and consists mainly of a rubber blend consisting of 20-95 parts by weight of a styrene-butadiene block copolymer having a specifically limited structure and 80-5 parts by weight of a diene rubber.

Abstract: A rubber composition for tire having low rolling resistance and high wet skid resistance, breakage strength and wear resistance consists mainly of a rubber component containing at least 20 parts by weight of a high vinyl butadiene-styrene copolymer rubber obtained by copolymerizing randomly styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bond in butadiene unit, and further containing metal-butadienyl bonds in its main chain in a weight fraction of at least 20% by weight.