Abstract: The present invention relates to a method for designing a cycloidal gear tooth profile of a gear shift actuator, the method designing a profile to have a backlash through a change in the radius of a rolling circle of an internal or external tooth profile of a cycloidal gear, and thus enables the smooth engagement of internal teeth and external teeth, reduces the engagement range of the internal teeth and the external teeth to have excellent durability and enable power loss to be reduced, and enables the shape machining of the gear by using general cycloidal gear machining, thereby facilitating manufacturing and being capable of improving machining precision.

Abstract: A pattern detecting device includes a length comparison unit suitable for comparing lengths of compressed input data and compressed reference data; and a data comparison unit suitable for comparing the compressed input data and the compressed reference data.

Abstract: The present invention relates to an apparatus and method for indicating flash memory life. While data is being stored in a flash memory, the number of writes in a plurality of blocks of the flash memory increases. The amount of flash memory life is calculated on the basis of the number of write times in the plurality of blocks. The calculated amount of life can be transmitted to a host. In addition, when the calculated amount of life is greater than a threshold value, a signal providing notice that the life of the flash memory has reached a dangerous level can be output.

Abstract: The present invention relates to a grouping method and device for enhancing redundancy removing performance for a storage unit such as a hard disk, a solid state disk (SSD), etc. The grouping method for enhancing performance of a redundancy removing technology may include: extracting samples from data that is stored in a buffer of a memory and is standing by to be processed; performing remaining calculations on the extracted samples; and grouping samples by connecting them to a bucket corresponding to a resultant value of the remaining calculations.

Abstract: The present invention relates to a storage device that uses a flash memory that performs power loss recovery, and to a method of power loss recovery by using the storage device using the flash memory. The storage device stores change information on metadata in physical pages in which one or more logical pages are compressed and stored. The change information on the metadata is information representing how the metadata is changed in association with data in the one or more logical pages. The storage device may synchronize the metadata in the flash memory and recover the metadata by applying the change information on the metadata to the synchronized metadata when a power supply is disrupted.

Abstract: The present invention relates to a method and device for storing data in a flash memory using address mapping for supporting various block sizes. A storage device determines the size of a block that a host system uses on the basis of the size of data that the host system requests and uses the determined block size as a mapping unit. Additionally, the storage device divides a logical address space into at least one area, and maps an address using the minimum units of different mappings in each divided area.

Abstract: A pattern detecting device includes a length comparison unit suitable for comparing lengths of compressed input data and compressed reference data; and a data comparison unit suitable for comparing the compressed input data and the compressed reference data.

Abstract: The present invention relates to an apparatus and method for controlling multi-way NAND flashes using input-output pins. The apparatus for controlling multi-way NAND flashes includes: a NAND flash monitor for confirming each state of a plurality of NAND flashes by using a read status command which checks whether an inner operation of the NAND flash is performed normally; and a scheduler for determining the order in which each of the NAND flashes occupies an input-output bus.

Abstract: The present invention relates to an apparatus and method for indicating flash memory life. While data is being stored in a flash memory, the number of writes in a plurality of blocks of the flash memory increases. The amount of flash memory life is calculated on the basis of the number of write times in the plurality of blocks. The calculated amount of life can be transmitted to a host. In addition, when the calculated amount of life is greater than a threshold value, a signal providing notice that the life of the flash memory has reached a dangerous level can be output.

Abstract: The present invention relates to a grouping method and device for enhancing redundancy removing performance for a storage unit such as a hard disk, a solid state disk (SSD), etc. The grouping method for enhancing performance of a redundancy removing technology may include: extracting samples from data that is stored in a buffer of a memory and is standing by to be processed; performing remaining calculations on the extracted samples; and grouping samples by connecting them to a bucket corresponding to a resultant value of the remaining calculations.

Abstract: The present invention relates to a storage device that uses a flash memory that performs power loss recovery, and to a method of power loss recovery by using the storage device using the flash memory. The storage device stores change information on metadata in physical pages in which one or more logical pages are compressed and stored. The change information on the metadata is information representing how the metadata is changed in association with data in the one or more logical pages. The storage device may synchronize the metadata in the flash memory and recover the metadata by applying the change information on the metadata to the synchronized metadata when a power supply is disrupted.

Abstract: The present invention relates to a method and device for storing data in a flash memory using address mapping for supporting various block sizes. A storage device determines the size of a block that a host system uses on the basis of the size of data that the host system requests and uses the determined block size as a mapping unit. Additionally, the storage device divides a logical address space into at least one area, and maps an address using the minimum units of different mappings in each divided area.

Abstract: A connection structure of plate type vertical drains and a circular horizontal drainpipe and a method of constructing a horizontal drain layer in soft ground using the same. The plate type vertical drains are coupled to the circular horizontal drainpipe using cylindrical fitters, so that excess pore water can be easily drained from underground even if the horizontal drain layer is constructed by pouring soil instead of sand, thereby reducing construction costs and a construction period.

Abstract: A connection structure of plate type vertical drains and a circular horizontal drainpipe and a method of constructing a horizontal drain layer in soft ground using the same. The plate type vertical drains are coupled to the circular horizontal drainpipe using cylindrical fitters, so that excess pore water can be easily drained from underground even if the horizontal drain layer is constructed by pouring soil instead of sand, thereby reducing construction costs and a construction period.

Abstract: A reinforcing geotextile mat and an embankment method using the same. The mat comprises support member for supporting backfilled soil at one end or both ends of the mat. The support member comprises a horizontal support section for supporting the backfilled soil in a vertical direction; a vertical support section for supporting the backfilled soil in a horizontal direction; and an inclined support section defined with openings through which the backfilling soil passes and inclinedly embedded in the backfilled soil. The method comprises the steps of positioning a reinforcing geotextile mat on the ground or hardened embankment soil; inserting external support members in horizontal, vertical and inclined receiving portions of the mat; and backfilling horizontal, vertical and inclined support sections of the mat with soil, and then placing and hardening embankment soil on the mat. These steps are implemented one or more times.

Abstract: A method for reinforcing a slope in which field ground deformation characteristics of an unstable slope can be rapidly and reliably judged and the unstable slope recovered and restored to its own natural state by introduction and application of an earth reinforcement theory, where apparent cohesion is increased by reinforcement members.

Abstract: Disclosed is a method for reinforcing a slope, in which field ground deformation characteristics of an unstable slope can be rapidly and reliably judged, and the unstable slope is recovered and restored to its own natural state so as to make it possible to secure stability by introduction and application of an earth reinforcement theory, i.e., a theory that an apparent cohesion is increased by reinforcement members.

Abstract: A method for strengthening a weak stratum using a solidified composition is provided. The method comprises the steps of: forming a horizontal drainage layer on the weak stratum; building-up mound structures on the drainage layer-formed weak stratum to the critical mound height; vertically forming holes in weak stratum; and mixing a first mixture comprising 25-35 parts by weight of cement, and on the basis of 100 parts by weight of the cement, 0.2-0.4 parts by weight of high fluid adjustment and 0.1-0.2 parts by weight of gel retardant, with a second mixture composed of 65-75 parts by weight of dried sand having a particle size of 0.074-5.0 mm, and on the basis of 100 parts by weight of the cement, 0.3-0.8 parts by weight of aluminum powder, then introducing the first and second mixture into the holes.

Abstract: A concrete retaining wall is disclosed on which flora can be cultured and a method for constructing the same. The retaining wall has a steel skeleton constructed with basal H-beams, aerial H-beams, L-beams, structural steel tubes and steel plates. The basal H-beams and the aerial beams are arranged in a direction parallel with the earth's surface and at a significant angle to the earth's surface, respectively, at such space intervals and dimensions that the retaining wall structure has sufficient bending resistance to overcome active earth pressures. The L-beams, the structural steel tubes and the steel plates are provided as reinforcements between the H-beams. Watertight concrete is applied to the basal H-beams. Wire mesh is attached to the aerial H-beams, the L-beams, the structural tubes and steel plates. The wire-mesh-mounted structure is coated with water-permeable concrete to form a stepped or embossed external surface.

Abstract: Disclosed are a solidified composition to strengthen weak stratum and a construction method using the same. The method comprises the steps of: forming a horizontal drainage layer on the weak stratum; building-up mound structures on the drainage layer-formed weak stratum to the critical mound height; vertically forming holes in said weak stratum; and mixing a first mixture comprising 20-30 parts by weight of cement, and on the basis of 100 parts by weight of the cement, 0.2-0.4 parts by weight of high fluide adjustment-admixture and 0.1-0.2 parts by weight of gel retardant, with a second mixture composed of 70-80 parts by weight of dried sand having a particle size of 0.074-5.0 mm, and on the basis of 100 parts by weight of the cement, 0.3-0.8 parts by weight of aluminum powder, then introducing the final mixture into the holes. By using the method, the weak stratum is rapidly strengthened by friction pile effect of the hardened porous sand pile.