Abstract: An actuator whose total length can be reduced is provided. An actuator (2) includes: a casing (7); a hollow shaft (8) rotatably supported by the casing (7) via a bearing (9a, 9b), the hollow shaft (8) including a bottom portion (8b); a screw shaft (14) coupled to the bottom portion (8b) of the hollow shaft (8), the screw shaft (14) sharing a common center line with the hollow shaft (8); and a nut (15) threadedly connected to the screw shaft (14). The nut (15) is capable of moving in an axial direction of the screw shaft (14) to enter between the hollow shaft (8) and the screw shaft (14).

Abstract: A secure computation system comprising secure computation server apparatuses, each of which comprises: a discriminant share generation part that computes discriminant shares configured so that an index relating to an input corresponds to a specific value from shares representing the index relating to the input and possible combinations of index shares of an array; a combination configuration part that configures a combination of shares of an element in the array and the discriminant shares for all possible combinations of indices of the array; a shuffle part that shuffles the combinations; a reconstruction part that reconstructs the discriminant shares in the shuffled combinations; and a selection part that selects shares of an element in the array in the combinations where the reconstructed value is the specific value.

Abstract: A bucket cylinder includes a cylindrical tube, a rod having a cylindrical boss part mounted to a protruding end side of the rod, and a protective cover having one side supported by a cover guide provided on the tube, while the other side is mounted on the boss part. A protective protrusion protruding outward in a radial direction of the boss part and protecting the boss part and the protective cover is provided on the boss part. The protective cover is formed having a plate shape by a material having elasticity, and the protective cover includes a plate part for protecting the rod between the cover guide and the boss part and a winding part formed so as to be wound around an outer periphery of the boss part from a distal end side of the plate part. A protective protrusion engaging hole into which the protective protrusion is engaged is provided in the winding part at a position corresponding to the protective protrusion.

Abstract: A bucket cylinder includes a cylindrical tube, a rod having a cylindrical boss part mounted to a protruding end side of the rod, and a protective cover having one side supported by a cover guide provided on the tube, while the other side is mounted on the boss part. A protective protrusion protruding outward in a radial direction of the boss part and protecting the boss part and the protective cover is provided on the boss part. The protective cover is formed having a plate shape by a material having elasticity, and the protective cover includes a plate part for protecting the rod between the cover guide and the boss part and a winding part formed so as to be wound around an outer periphery of the boss part from a distal end side of the plate part. A protective protrusion engaging hole into which the protective protrusion is engaged is provided in the winding part at a position corresponding to the protective protrusion.

Abstract: Teaching (contacting) operation is performed, and from the contact position (SX), the workpiece (2) is ground by a given “test grinding amount (A).” Subsequently, the diameter of the workpiece is measured. Based on the result of the measurement, the residual amount to be ground (residual grinding amount) to obtain the finished dimensions is calculated, and grinding by the “residual grinding amount (R)” is performed.

Abstract: With the center position CP of a support shaft 6 supporting a grinding wheel 4 being a reference, a provisional grinding start position S0? for a first workpiece 2 is calculated, based on a diameter ID of the first workpiece 2 before grinding, a diameter WD of the grinding wheel, a grinding completion position S4 on the first workpiece after the grinding, and an actual grinding start position S0 of the grinding wheel before grinding in second and subsequent grinding. S0 is determined by performing the grinding by moving the grinding wheel from S0? and by moving the grinding wheel away from the first workpiece by a distance corresponding to S4 near the grinding completion position S4. S0? is set by a calculation, S0?=ID?WD?S4?S?, considering an allowance S? between S0 and S0?.

Abstract: Teaching (contacting) operation is performed, and from the contact position (SX), the workpiece (2) is ground by a given “test grinding amount (A).” Subsequently, the diameter of the workpiece is measured. Based on the result of the measurement, the residual amount to be ground (residual grinding amount) to obtain the finished dimensions is calculated, and grinding by the “residual grinding amount (R)” is performed.

Abstract: With the center position CP of a support shaft 6 supporting a grinding wheel 4 being a reference, a provisional grinding start position S0? for a first workpiece 2 is calculated, based on a diameter ID of the first workpiece 2 before grinding, a diameter WD of the grinding wheel, a grinding completion position S4 on the first workpiece after the grinding, and an actual grinding start position S0 of the grinding wheel before grinding in second and subsequent grinding. S0 is determined by performing the grinding by moving the grinding wheel from S0? and by moving the grinding wheel away from the first workpiece by a distance corresponding to S4 near the grinding completion position S4. S0? is set by a calculation, S0?=ID?WD?S4?S?, considering an allowance S? between S0 and S0?.

Abstract: Encryption and decryption is achieved without the requirement for updating of the encryption key or re-encryption of an encrypted file when a shared encrypted file is generated, renamed or deleted. In response to a request to read or store a shared encrypted file, a filter driver in a client computer receives client authentication from a key management server and acquires a key list having pairs of UNC path names and encryption keys corresponding to shared encrypted folders allowed to be accessed from the key management server. The filter driver accesses a shared encrypted folder as a destination of the read or store request and performs decryption or encryption of the shared encrypted file by using an encryption key of the key list corresponding to a UNC path name concerned with the UNC path name to be accessed when the UNC path name concerned is present in the key list.