Abstract: There is provided a code generation method. The method comprises extracting columns corresponding to the number of symbols of a codeword from a parity check matrix of an error correction code; generating a shortened parity check matrix for the error correction code on the basis of the columns corresponding to the number of symbols of the codeword; checking whether the shortened parity check matrix includes an independent nonzero syndrome for each of a single symbol error and a double error; and generating a parity check matrix for a correction of the single symbol error corresponding to the number of bits of the shortened parity check matrix and a correction of the double error corresponding to the number of bits of the shortened parity check matrix if the shortened parity check matrix includes the independent nonzero syndrome for each of the single symbol error and the double error.

Abstract: A fender davit device is disclosed. The fender davit device in accordance with an aspect of the present disclosure includes a fender and a davit comprising a hauling line holding the fender and a winch configured to move the fender by winding or unwinding the hauling line. The fender davit device also includes a hauling line tension maintaining part configured to maintain a tension of the hauling line holding the fender to prevent the hauling line from breaking.

Abstract: A fender davit device is disclosed. The fender davit device in accordance with an aspect of the present disclosure includes a fender and a davit comprising a hauling line holding the fender and a winch configured to move the fender by winding or unwinding the hauling line. The fender davit device also includes a hauling line tension maintaining part configured to maintain a tension of the hauling line holding the fender to prevent the hauling line from breaking.

Abstract: A parallel-type micro robot capable of precise control while minimizing size thereof and a surgical robot system having the same are disclosed. The parallel-type micro robot includes a base plate, a work plate, a main fixing shaft module, a horizontal movement module and at least one angle-controlling module. The base plate includes a base body portion and at least one base connecting portion connected to the base body portion. The work plate includes a work body portion corresponding to the base body portion and at least one work connecting portion connecting to the work body portion to correspond to the base connecting portion. The main fixing shaft module is disposed between the base body portion and the work body portion, and coupled to the work body portion such that the work body portion is rotatable. The horizontal movement module is disposed between the main fixing shaft module and the base body portion, and moves the main fixing shaft module along first and second directions intersecting each other.

Abstract: The present invention discloses a winch and an autonomous mobile apparatus including the winch. The winch can include: a driving motor; a drum driving axle configured to be rotated the driving motor; a wire drum configured to be rotated by the drum driving axle; a roller driving axle arranged to be parallel to the drum driving axle and configured to be rotated in different direction from that of the drum driving axle by the driving motor; a roller connected with the roller driving axle and configured to support a wire wound on or unwound from the wire drum; and a one way clutch installed in the roller driving axle in such a way that a driving force transferred to the roller by the roller driving axle is cut off when the wire drum rotates in a direction of winding the wire.

Abstract: The present invention discloses a winch and an autonomous mobile apparatus including the winch. The winch can include: a driving motor; a driving axle configured to rotate by having a driving force transferred from the driving motor; a wire drum installed on the driving axle in such a way that the wire drum is rotated by the driving axle and can move along the driving axle, a first screw part formed on an external circumferential surface of lengthwise end thereof; and a guide part arranged to be parallel to the driving axle and having a second screw part formed on a lateral side that faces the driving axle, the second screw part being extended in a lengthwise direction of the driving axle and engaged with the first screw part. The wire drum can move along the guide part in such a way that the length of a wire being wound or unwound for one rotation of the wire drum is constant.

Abstract: The present invention discloses a winch and an autonomous mobile apparatus including the winch. The winch can include: a driving motor; a drum driving axle configured to be rotated the driving motor; a wire drum configured to be rotated by the drum driving axle; a roller driving axle arranged to be parallel to the drum driving axle and configured to be rotated in different direction from that of the drum driving axle by the driving motor; a roller connected with the roller driving axle and configured to support a wire wound on or unwound from the wire drum; and a one way clutch installed in the roller driving axle in such a way that a driving force transferred to the roller by the roller driving axle is cut off when the wire drum rotates in a direction of winding the wire.

Abstract: The present invention discloses a tendon controlled mobile platform configured to move within a work space defined by a structure. The tendon controlled mobile platform of the present invention, which includes: a mobile platform including a main frame, a plurality of upper winches coupled to an upper part of the main frame, and a plurality of lower winches coupled to a lower part of the main framed, the mobile platform being placed with the work space; a plurality of first wires having respective one ends coupled to lower sides of the structure and respective the other ends coupled to the upper winches, the lengths of the first wires being adjustable; and a plurality of second wires having respective one ends coupled to upper sides of the structure and respective the other ends coupled to the lower winches, the lengths of the second wires being adjustable, can expand the movement range of the mobile platform, thereby expanding the work area, and can easily move the work equipment to an adjacent work area.

Abstract: This invention provides a method for preparing a polymethylmethacrylate spherical bead and in particular, it provides a method for preparing a polymethylmethacrylate spherical bead characterized in that it is prepared by preparing polymethylmethacrylate by polymerizing methyl-methacrylate monomers, evaporating remaining methylmethacrylate monomers by raising temperature up to at least 100° C. after the polymerization reaction, and washing the polymethylmethacrylate with a mixed solvent of ethanol and water and vacuum drying them.

Abstract: This invention discloses a process for the production of 2-methoxy-3,6-dichlorobenzoic acid which comprises reacting 2-amino-3,6-dichlorobenzoic acid with nitrous acid to form the corresponding diazonium salt, hydrolyzing the diazonium salt to form 2-hydroxy-3,6-dichlorobenzoic acid and methylating said hydroxy acid.