Abstract: Disclosed is 3D printer that may precisely irradiate a laser to a spot where the laser is to be irradiated so that a precise three-dimensional product may be output, and prevent a temperature deviation from occurring inside a case including a product forming chamber to improve the quality of the output product, and increase the durability of the output product by enhancing the binding force between powder and powder applied to an output bed and maximizing the melting of the powder.

Abstract: A system for detecting and blocking a web attack includes a filter unit receiving web request data from a user terminal, and controlling a web application to maintain a standby state, and a web firewall daemon receiving the web request data from the filter unit and determining a risk by analyzing the web request data and transmitting the resulting risk to the filtering unit. A method of detecting and blocking a web attack includes receiving web request data from a user terminal, controlling a web application to maintain a standby state, transmitting the web request data to a web firewall daemon, determining a risk by analyzing the web request data, and transmitting the risk of the web request data to the filtering unit. Embodiments of the present invention can provide customer customized web security service without affecting the stability and the availability of the web application.

Abstract: A system for detecting and blocking a web attack includes a filter unit receiving web request data from a user terminal, and controlling a web application to maintain a standby state, and a web firewall daemon receiving the web request data from the filter unit and determining a risk by analyzing the web request data and transmitting the resulting risk to the filtering unit. A method of detecting and blocking a web attack includes receiving web request data from a user terminal, controlling a web application to maintain a standby state, transmitting the web request data to a web firewall daemon, determining a risk by analyzing the web request data, and transmitting the risk of the web request data to the filtering unit. Embodiments of the present invention can provide customer customized web security service without affecting the stability and the availability of the web application.

Abstract: Disclosed is 3D printer that may precisely irradiate a laser to a spot where the laser is to be irradiated so that a precise three-dimensional product may be output, and prevent a temperature deviation from occurring inside a case including a product forming chamber to improve the quality of the output product, and increase the durability of the output product by enhancing the binding force between powder and powder applied to an output bed and maximizing the melting of the powder.

Abstract: An apparatus for controlling pressure of a braking system including a pressure sensor configured to detect a pressure value within the braking system mounted in a vehicle, and collect the detected pressure value as an analog pressure signal; and a control device configured to calibrate the analog pressure signal received from the pressure sensor, convert the calibrated analog pressure signal into a digital pressure signal, and output the digital pressure signal.

Abstract: A developing device includes a developer transport path through which a developer is agitated and transported, a developing roller mounted in the developer transport path, a discharging unit extending from the developer transport path in a length direction of the developing roller, the discharging unit including an air outlet from which air is discharged and a developer discharge outlet from which the developer is discharged, and a separating member mounted in the discharging unit to separate an inner portion of the discharging unit into an air discharge path, connecting the developer transport path and the air outlet, and a developer discharge path, connecting the developer transport path and the developer discharge outlet.

Abstract: A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.

Abstract: A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.

Abstract: A developing device comprising a developer transporting unit including a developer inlet through which a developer is reintroduced, a developer outlet through which the developer is discharged, and a developing roller mounted in the developer transporting unit; and a developer circulator including a first connection opening connected to the developer outlet, to receive the developer discharged through the developer outlet, a second connection opening connected to the developer inlet to reintroduce the developer through the developer inlet into the developer transporting unit, a waste opening through which the developer is discarded, and a guide member mounted in the developer circulator to selectively guide the developer received through the first connection opening to the second connection opening or to the waste opening.

Abstract: A developing device includes a developer transport path through which a developer is agitated and transported, a developing roller mounted in the developer transport path, a discharging unit extending from the developer transport path in a length direction of the developing roller, the discharging unit including an air outlet from which air is discharged and a developer discharge outlet from which the developer is discharged, and a separating member mounted in the discharging unit to separate an inner portion of the discharging unit into an air discharge path, connecting the developer transport path and the air outlet, and a developer discharge path, connecting the developer transport path and the developer discharge outlet.

Abstract: A developing device comprising a developer transporting unit including a developer inlet through which a developer is reintroduced, a developer outlet through which the developer is discharged, and a developing roller mounted in the developer transporting unit; and a developer circulator including a first connection opening connected to the developer outlet, to receive the developer discharged through the developer outlet, a second connection opening connected to the developer inlet to reintroduce the developer through the developer inlet into the developer transporting unit, a waste opening through which the developer is discarded, and a guide member mounted in the developer circulator to selectively guide the developer received through the first connection opening to the second connection opening or to the waste opening.

Abstract: Disclosed are a thermal desorption system for oil-contaminated soil and gravel, using a microwave indirect irradiation method and including a microwave emission prevention device and a preheating device using waste heat, and a thermal desorption method for oil-contaminated soil and gravel, using the same. In addition, it is disclosed that an outer tube encompassing an inner tube extends to both sides and a plurality of ring-shaped microwave attenuation units are arranged on the inner circumferential surface of the outer tube, such that microwaves are prevented from leaking between the inner tube and the outer tube, thereby enabling eco-friendliness, and even the waste heat generated during a pollutant desorption process is utilized in the system itself, thereby enabling economic feasibility to increase further.

Abstract: A high-strength aluminum alloy for die casting having excellent corrosion resistance and thermal conductivity includes, based on the total weight of the alloy, 5 to 7 wt % of silicon (Si), 0.1 to 1.0 wt % of iron (Fe), 0.1 to 3.0 wt % of magnesium (Mg), 0.1 to 1.0 wt % of nickel (Ni), 0.15 to 0.45 wt % of titanium (Ti), 1.0 to 3.0 wt % of tin (Sn), and the remainder aluminum (Al).

Abstract: Embodiments of the present invention relate to a thermal desorption system for oil-contaminated soil and gravel, using a microwave indirect irradiation method and including a microwave emission prevention device and a preheating device using waste heat, and a thermal desorption method for oil-contaminated soil and gravel, using the same and, more specifically to: a device capable of economically purifying, in an eco-friendly manner, contaminated soil and gravel by using a microwave indirect irradiation method on soil and gravel contaminated by pollutants such as various oils or organic waste; and a method therefor.

Abstract: A polycarbonate resin includes a repeat unit represented by Formula 1; a repeat unit represented by Formula 2; and a repeat unit represented by Formula 3, wherein the polycarbonate resin has a weight average molecular weight of about 15,000 g/mol to about 60,000 g/mol and a melt index of about 3 g/10 min to about 40 g/10 min.: wherein R1, R2, R3, R4, a, b, c, and d are the same as defined in the specification. The polycarbonate resin for film can exhibit excellent scratch resistance, elongation, chemical resistance and heat resistance, and can be used to prepare a film in roll form without any protective film.

Abstract: The present disclosure relates to a clutch control apparatus, and more particularly, to a clutch control apparatus that achieves miniaturization of machinery and reduces an operational error by using a non-contact type displacement detection system using a position detecting sensor for a clutch clearance, and regulates the operation of an actuator using a plurality of solenoid valves, as a result, allowing accurate position control of a pneumatic cylinder which operates the clutch, thereby improving fuel efficiency and achieving fuel reduction as well as reducing emissions of carbon dioxide.

Abstract: A polymer includes a structural unit represented by Chemical Formula 1 and an organic layer composition including the same. wherein in Chemical Formula 1, A is a carbon cyclic group including at least one hetero atom, B is one of groups in Group 1, where Ar1 to Ar4, R11 to R14, L and m are as defined in the specification and * is a linking point.

Abstract: The polycarbonate resin composition of the present invention comprises: a polycarbonate ingredient including a copolymerized polycarbonate resin and an aromatic polycarbonate resin, the copolymerized polycarbonate resin having a repeating unit represented by chemical formula 1 of claim 1, a repeating unit represented by chemical formula 2 of claim 1, and a repeating unit represented by chemical formula 3 of claim 1; and an acrylic-based impact reinforcing agent. The polycarbonate resin composition has excellent scratch resistance, impact resistance, and heat resistance.

Abstract: The present disclosure relates to a clutch control apparatus, and more particularly, to a clutch control apparatus that achieves miniaturization of machinery and reduces an operational error by using a non-contact type displacement detection system using a position detecting sensor for a clutch clearance, and regulates the operation of an actuator using a plurality of solenoid valves, as a result, allowing accurate position control of a pneumatic cylinder which operates the clutch, thereby improving fuel efficiency and achieving fuel reduction as well as reducing emissions of carbon dioxide.

Abstract: A polymer includes a structural unit represented by Chemical Formula 1 and an organic layer composition including the same. wherein in Chemical Formula 1, A is a carbon cyclic group including at least one hetero atom, B is one of groups in Group 1, where Ar1 to Ar4, R11 to R14, L and m are as defined in the specifiction and * is a linking point.