Abstract: A high-temperature-steam-oxidation-resistive coated reinforcement fiber applicable to a fiber reinforced composite, is provided with: a reinforcement fiber; a coating layer covering the reinforcement fiber and including a rare-earth silicate; an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber; and a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer.

Abstract: An on-vehicle device mounted on a train includes a second on-vehicle-side wireless communication unit that performs wireless communication with the ground side, and an on-vehicle-side ground-to-vehicle communication security unit that encrypts or decrypts wireless communication data. The on-vehicle-side ground-to-vehicle communication security unit includes an on-vehicle-side secret-key holding unit that retains a plurality of secret keys that have secret key numbers for performing encryption or decryption; an on-vehicle-side secret-key selecting unit that selects one secret key from the on-vehicle-side secret-key holding unit using a secret key number calculated using train information unique to a train; and an on-vehicle-side encryption and decryption processing unit that performs encryption or decryption using the one secret key selected by the on-vehicle-side secret-key selecting unit.

Abstract: A high-temperature-steam-oxidation-resistive coated reinforcement fiber applicable to a fiber reinforced composite, is provided with: a reinforcement fiber; a coating layer covering the reinforcement fiber and including a rare-earth silicate; an exfoliative layer intervening in an interface between the coating layer and the reinforcement fiber; and a supplemental coating layer covering the reinforcement fiber, the exfoliative layer and the coating layer.

Abstract: An on-vehicle device mounted on a train includes a second on-vehicle-side wireless communication unit that performs wireless communication with the ground side, and an on-vehicle-side ground-to-vehicle communication security unit that encrypts or decrypts wireless communication data. The on-vehicle-side ground-to-vehicle communication security unit includes an on-vehicle-side secret-key holding unit that retains a plurality of secret keys that have secret key numbers for performing encryption or decryption; an on-vehicle-side secret-key selecting unit that selects one secret key from the on-vehicle-side secret-key holding unit using a secret key number calculated using train information unique to a train; and an on-vehicle-side encryption and decryption processing unit that performs encryption or decryption using the one secret key selected by the on-vehicle-side secret-key selecting unit.

Abstract: A dielectric layer for an electrostatic chuck is formed of a ceramic material having a first phase including aluminum oxide and a second phase including composite carbonitride (Ti, Me)(C, N) that contains titanium as fine grains. The Me represents a transition element and metals of Group 4 to Group 6 such as Mo and W. The ceramic material that includes the second phase by 0.05 vol % to 2.5 vol % has a volume resistivity value of about 108 to 1013 (?·cm) necessary for a Johnsen-Rahbek type electrostatic chuck.

Abstract: A dielectric layer for an electrostatic chuck is formed of a ceramic material having a first phase including aluminum oxide and a second phase including composite carbonitride (Ti, Me)(C, N) that contains titanium as fine grains. The Me represents a transition element and metals of Group 4 to Group 6 such as Mo and W. The ceramic material that includes the second phase by 0.05 vol % to 2.5 vol % has a volume resistivity value of about 108 to 1013 (?·cm) necessary for a Johnsen-Rahbek type electrostatic chuck.