Abstract: A power transmission shaft performs a fuse-like function when excessive torque is applied to a power input side. The power transmission shaft includes: a main shaft connected to a power device; flanges connected to the power device and provided at both sides of the main shaft; and a flexible coupling extending in the radial direction of the main shaft. The power transmission shaft includes a power shutoff unit which shuts off power by breaking the main shaft or the flanges when torque greater than a predetermined level is applied. When excessive torque is applied to the power input side, the power transmission shaft performs a fuse-like function with respect to the excessive torque, thereby enhancing safety, preventing sparks from occurring at the time of the breakage, facilitating the production thereof, and effectively preventing vibration while sufficiently supporting the speed or load in the event of a high rotation rate.

Abstract: An actuator and a camera module including the same are provided. The actuator driving apparatus includes a detector configured to apply a reference signal to a driving coil of an actuator and detect a coil current flowing in the driving coil, a calculator configured to determine a position of a lens carrier based on the coil current, and a driver configured to drive the actuator based on the position of the lens carrier and a position control signal.

Abstract: Gamma-ray sensing probes operating under the Cerenkov effect measure the burnup of spent nuclear fuel assemblies. The probes include an optical fiber that reacts to gamma rays coming from the spent nuclear fuel assembly and emit light via the Cerenkov effect. A scatterer surrounds the optical fiber to increase the light emitting efficiency of the optical fiber by the Compton electron scattering. A collimator composed of shielding material surrounds the scatterer. The collimator has a slit groove which is open in one direction for directing the gamma rays from the spent fuel assembly to the scatterer.

Abstract: A camera module includes a housing; a first lens module and a second lens module accommodated in the housing; a printed circuit board attached to the housing; an actuator disposed between the first and second lens modules and the housing and configured to move the first and second lens modules in an optical axis direction; and a single integrated circuit disposed on the printed circuit board and configured to control movements of the first and second lens modules.

Abstract: An actuator includes a magnet, a driving coil facing the magnet, a driver, and a position calculation processor. The driver is configured to move the magnet in at least one of an optical axis direction and a direction perpendicular to the optical axis by applying a driving signal to the driving coil. The position calculation processor includes sensing coils, and is configured to calculate a position of the magnet according to inductance levels of an inductor of the sensing coils. The inductance levels vary according to movements of the magnet.

Abstract: A camera module actuator is described including a magnet, a coil disposed to face the magnet, and a driver configured to apply a driving signal to the coil to move the magnet. The camera module actuator also includes a detector configured to detect a position of the magnet from a change in inductance of the coil, based on the movement of the magnet.

Abstract: Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and/or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.

Abstract: A power transmission shaft which alleviates phenomenon in which stress is concentrated on a specific portion of a diaphragm to improve fatigue life span. The power transmission shaft connects a power apparatus and includes a flexible coupling, which is configured by a hub unit positioned inside in a radial direction. A rim unit is positioned outside in a radial direction of the hub unit. A flexible diaphragm unit is positioned between the hub unit and the rim unit. The thickness in the axial direction of the flexible diaphragm unit, from the hub unit toward the rim unit, becomes thinner then thicker to have a minimum thickness interval. The flexible diaphragm unit has a contoured first side on one side in the axial direction and a contoured second side on the other side. The first side has a first inflection point and the second side has a second inflection point.

Abstract: An actuator driving apparatus includes an inductor disposed on a housing to face a magnetic body attached to a lens carrier, a detector configured to apply a reference signal to the inductor and detect an inductor current flowing through the inductor, a calculator configured to determine a position of the lens carrier based on the inductor current, and a driver configured to drive an actuator based on the position of the lens carrier and a position control signal.

Abstract: Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and/or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.

Abstract: An actuator and a camera module including the same are provided. The actuator driving apparatus includes a detector configured to apply a reference signal to a driving coil of an actuator and detect a coil current flowing in the driving coil, a calculator configured to determine a position of a lens carrier based on the coil current, and a driver configured to drive the actuator based on the position of the lens carrier and a position control signal.

Abstract: An actuator driving apparatus includes an inductor disposed on a housing to face a magnetic body attached to a lens carrier, a detector configured to apply a reference signal to the inductor and detect an inductor current flowing through the inductor, a calculator configured to determine a position of the lens carrier based on the inductor current, and a driver configured to drive an actuator based on the position of the lens carrier and a position control signal.

Abstract: Provided are a gamma-ray sensing probe using the Cerenkov effect, and a system for identifying the burnup of a spent nuclear fuel assembly using the gamma-ray sensing probes, wherein the system is established using the gamma-ray sensing probe including: an optical fiber reacting to gamma rays coming from the spent nuclear fuel assembly by the Cerenkov effect and emitting light by itself; a scatterer surrounding the optical fiber to increase light emitting efficiency of the optical fiber by the Cerenkov effect; and a collimator configured to surround the scatterer and composed of a shielding material, the collimator having a slit groove which is open in one direction, whereby the burnup of the spent nuclear fuel assembly can be accurately determined.

Abstract: Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and/or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.

Abstract: Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and/or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.

Abstract: Provided are an apparatus for supplying amine, including: transfer pipe through which amine is transferred; a heat wire which heats the amine that flows through the transfer pipe; a temperature control sensor which controls the temperature in the transfer pipe; and a product recovery valve which recovers product resulting from thermal decomposition of the amine, and a method for supplying amine using the same. The apparatus and method for supplying amine are capable of economically and effectively supplying amine utilizing the thermal decomposition properties of the amine, and may be used to supply amine, for example, to circulating water for power plants.

Abstract: Provided is a physical and chemical cleaning method, including introducing nitrogen gas, liquid nitrogen or dry ice into a cleaning solution containing at least one selected from the group consisting of water, monoethanolamine (ETA), dimethylamine (DMA), NH3, ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA) and N2H2 to remove sludge. The physical and chemical cleaning method is capable of removing sludge, generated or deposited on the substrate surfaces, surfaces of constitutional parts, or gaps in various systems and instruments, more effectively. The physical and chemical cleaning method may be applied to cleaning of steam generators, boilers, heat exchangers, or the like, used in atomic power stations.

Abstract: Provided are an apparatus for supplying amine, including: transfer pipe through which amine is transferred; a heat wire which heats the amine that flows through the transfer pipe; a temperature control sensor which controls the temperature in the transfer pipe; and a product recovery valve which recovers product resulting from thermal decomposition of the amine, and a method for supplying amine using the same. The apparatus and method for supplying amine are capable of economically and effectively supplying amine utilizing the thermal decomposition properties of the amine, and may be used to supply amine, for example, to circulating water for power plants.

Abstract: An embedded auditory system includes a voice detecting unit for receiving a voice signal as an input and dividing the voice signal into a voice section and a non-voice section; a noise removing unit for removing a noise in the voice section of the voice signal using noise information in the non-voice section of the voice signal; and a keyword spotting unit for extracting a feature vector from the voice signal noise-removed by the noise removing unit and detecting a keyword from the voice section of the voice signal using the feature vector. A method for processing a voice signal includes receiving a voice signal as an input and dividing the voice signal into a voice section and a non-voice section; removing a noise in the voice section of the voice signal using noise information in the non-voice section of the voice signal; and extracting a feature vector from the voice signal noise-removed by the noise removing unit and detecting a keyword from the voice section of the voice signal using the feature vector.

Abstract: Provided is a method for recovering high-concentration and high-purity amine from amine-containing waste water generated from nuclear power plants and thermal power plants. The method includes: capturing amine and concentrating waste water using a cation exchange resin; separating amine from the concentrated amine-containing waste water; and carrying out further separation of amine via distillation. The method may be applied to treat amine, which causes an increase in biochemical oxygen demand (BOD) and total nitrogen concentration, drastically at the time of its generation from waste water of nuclear power plants and thermal power plants. In this manner, the method may prevent an increase in load of existing waste water treating plants and avoid a need for modifying the equipment in the existing plants.