Abstract: Disclosed herein is a chip inlaid flooring material using a PLA resin. The chip inlaid flooring material includes a chip inlaid layer, a dimension stabilizing layer, and a base layer, from the top of the flooring material, wherein at least one of the chip inlaid layer and the base layer includes polylactic acid (PLA) resin as a binder.

Abstract: Disclosed is a flooring material using an environment-friendly PLA resin. According to the present invention, the flooring material using the PLA resin comprises: a base layer; a print layer which is formed on top of the base layer, and has a print pattern on an upper side thereof; and a transparent layer which is formed on top of the print layer, wherein one or more of the base layer, the print layer, and the transparent layer include polylactic acid (PLA) resin.

Abstract: The present invention relates to a board complex having a polylactic acid (PLA) cover. The board complex includes: a cover member having at least one layer containing a PLA resin; and a board formed beneath the cover member, wherein the material for the board is selected from medium-density fiberboard (MDF), plywood, asbestos-free cellulose fiber reinforced cement board, magnesium board, glued laminated timber, high density fiberboard (HDF), particle board, ceramic tile, porcelain tile, ceramic board, and click-fastened board.

Abstract: Disclosed is a chip through flooring material using a PLA resin, which is environmentally friendly by using the PLA resin and can realize the texture of natural wood and the unique fragrance of trees. According to the present invention, the chip through flooring material using the PLA resin includes: a chip through layer; and a surface treatment layer which is formed on a surface of the chip through layer, wherein the chip through layer includes the PLA resin.

Abstract: Disclosed is a carburization heat treatment method including carburizing a workpiece at a relatively low temperature within a temperature range of A1˜A3 using a vacuum carburizing furnace and then performing quenching using a high-pressure gas, in which the workpiece is made of typical carburizing alloy steel having a carbon content of about 0.10˜0.35 wt %. This method can be applied to carburization heat treatment of a steel workpiece sensitive to heat deformation, such as an annulus gear, in lieu of a conventional gas carburization method using plug quenching.

Abstract: Disclosed is a carburization heat treatment method including carburizing a workpiece at a relatively low temperature within a temperature range of A1˜A3 using a vacuum carburizing furnace and then performing quenching using a high-pressure gas, in which the workpiece is made of typical carburizing alloy steel having a carbon content of about 0.10˜0.35 wt %. This method can be applied to carburization heat treatment of a steel workpiece sensitive to heat deformation, such as an annulus gear, in lieu of a conventional gas carburization method using plug quenching.

Abstract: The present invention relates to an apparatus for removing the partial discharge (PD) noise of an electrical power facility that is capable of quickly removing noise from a partial discharge signal generated from the electrical power facility such as a gas insulated switchgear (GIS) and the like, and an apparatus for detecting a partial discharge generated section.

Abstract: The present invention relates to an alloy steel for low temperature vacuum carburizing, and more particularly, to an alloy steel for low temperature vacuum carburizing, wherein, where the thermal processing of carburizing and quenching is performed at 810° C. or so of an available minimum carburizing temperature of a conventional vacuum carburizing furnace, it is able to securing an adequate ferrite phase (?) to improve the thermal distortion according to the thermal processing of an annulus gear, and to satisfying shape restrictions such as a roundness or a cylindricity of the annulus gear to be manufactured. An alloy steel for a low temperature vacuum carburizing according to the present invention, the alloy steel is composed of a chief element of Fe, wherein the alloy steel is formed so that dissolved oxygen (DO) is 10 ppm or less in an alloy system which comprises 0.17˜0.24 weight percent of C, 0.8˜1.2 weight percent of Cr, 0.4˜0.8 weight percent of Mn, 0.80˜1.20 weight percent of Si, 0.

Abstract: Disclosed is a carburization heat treatment method including carburizing a workpiece at a relatively low temperature within a temperature range of A1˜A3 using a vacuum carburizing furnace and then performing quenching using a high-pressure gas, in which the workpiece is made of typical carburizing alloy steel having a carbon content of about 0.10˜0.35 wt %. This method can be applied to carburization heat treatment of a steel workpiece sensitive to heat deformation, such as an annulus gear, in lieu of a conventional gas carburization method using plug quenching.

Abstract: An absolute steering angle of a steering shaft for a vehicle is measured using rotatable bodies that rotate together with the steering shaft at respective predetermined rotation ratios. A ?M? value is obtained by measuring a relative rotational angle ?? of a first rotatable body and a ?M? value is obtained by measuring the relative rotational angle ?? of a second rotatable body. ?C's are obtained by calculating relative rotational angles ?'s of the second rotatable body corresponding to the ?M? value, using the relation between ?? and ??. A frequency i-value of the first rotatable body is obtained by comparing the ?Cs to the ?M? value. An absolute steering angle ?1 of the steering shaft is obtained based on the relation between absolute rotational angles ? and ?, after ? is obtained using the i-value.

Abstract: Disclosed is a customer relationship management system and operation method thereof that enables a technician to seize the customer's satisfaction and sensitivity with respect to respective service providers, perform reception of the corresponding customer based on the seized information, register the seized information in a database, and perform a service using a proper reception for the corresponding customer after confirming the sensitivity of the customer. According to the customer relationship management system and operation method, the customer can directly select the technician, and thus remove the uneasy feeling caused by a strange visitor. Also, by confirming again the customer's satisfaction with the service after completion of the service providing, the reliability of the service with respect to the customer is improved.

Abstract: A method is provided for measuring an absolute steering angle ? of a steering shaft for a vehicle, using a first rotatable body that rotates together with the steering shaft of the vehicle at a predetermined rotation ratio. The method includes obtaining a ?M? value by measuring a relative rotational angle ?? of the first rotatable body using an angle sensor having a measurement range of ?. The method also includes obtaining a present value for a frequency i-value of the first rotatable body by comparing the present ?M? value to a previous ?M? value. The method also includes obtaining a present value for a absolute steering angle ?1 of the steering shaft from a present value for an absolute rotational angle ? of the first rotatable body by using the ?M? value and the present i-value.

Abstract: A method is provided for measuring an absolute steering angle ? of a steering shaft for a vehicle, using a first rotatable body that rotates together with the steering shaft of the vehicle at a predetermined rotation ratio. The method includes obtaining a ?M? value by measuring a relative rotational angle ?? of the first rotatable body using an angle sensor having a measurement range of ?. The method also includes obtaining a present value for a frequency i-value of the first rotatable body by comparing the present ?M? value to a previous ?M? value. The method also includes obtaining a present value for a absolute steering angle ?1 of the steering shaft from a present value for an absolute rotational angle ? of the first rotatable body by using the ?M? value and the present i-value.

Abstract: A method for measuring a steering angle of a steering shaft for a vehicle uses a first rotatable body that rotates together with the steering shaft at an r1 ratio and a second rotatable body that rotates together with the steering shaft at an r2 ratio. An absolute rotational angle of the first rotatable body, ?, can be expressed as ??+i?, and an absolute rotational angle of the second rotatable body, ?, can be expressed as ??+i?. ?? and ?? are measured using an angle sensor having a measurement range of ?. To obtain the steering angle ? of the steering shaft, measurement values ?M? and for ?M? of ?? and ?? are obtained. A plurality of ?'s corresponding to the ?M? value are calculated from a relation between ?? and ?? to yield a ?C?. By comparing the ?M? to the ?C?, an i-value of the first rotatable body is obtained. The obtained i-value is then used to obtain an absolute rotational angle ? of the first rotatable body.

Abstract: A method is provided for measuring an absolute steering angle of a steering shaft for a vehicle using a first rotatable body and a second rotatable body that rotate together with the steering shaft of the vehicle at a predetermined rotation ratio, respectively. The method includes organizing a table by matching a plurality of relative rotational angle pairs (??, ??), where ?? is a relative rotational angle of the first rotatable body, and ?? is a relative rotational angle of the second rotatable body, with respective absolute steering angles, ?s, that correspond to each of the relative rotational angle pairs. The method also includes obtaining a ?M? value by measuring the relative rotational angle ?? of the first rotatable body and obtaining a ?M? value by measuring the relative rotational angle ?? of the second rotatable body, using at least an angle sensor having a measurement range of ?.

Abstract: Disclosed is a device for detecting a partial discharge of power equipment. EM (electromagnetic wave) sensors detect EM signals from a partial discharge in a metal clad switchgear, a power cable, and a GIS. EM detectors amplify the signals from the sensors, and output only noise-removed IF signals. A pulse generator integrates the IF-processed EM to compare the integrated value with a previous value, and outputs a pulse according to a partial discharge. An EM level processor compares the IF-processed EM with reference voltages to output EM pulses of a plurality of levels. A waveform shaper shapes the pulses. A controller calculates the average number of pulses per 1 cycle by counting the partial discharge pulses for a predetermined time, receives the waveform-shaped pulses to calculate the partial discharge amount, and transmits the calculated amount, combined with the average number, to an external monitoring system.

Abstract: Disclosed is a customer relationship management system and operation method thereof that enables a technician to seize the customer's satisfaction and sensitivity with respect to respective service providers, perform reception of the corresponding customer based on the seized information, register the seized information in a database, and perform a service using a proper reception for the corresponding customer after confirming the sensitivity of the customer. According to the customer relationship management system and operation method, the customer can directly select the technician, and thus remove the uneasy feeling caused by a strange visitor. Also, by confirming again the customer's satisfaction with the service after completion of the service providing, the reliability of the service with respect to the customer is improved.