Abstract: Provided is a method of preparing a nanocomposite material plated with a network-type metal layer through silica self-cracks and a wearable electronics carbon fiber prepared therefrom. The present disclosure provides a nanocomposite material having excellent electrical conductivity and bending resistance by plating a network-type metal layer on a substrate having a flat surface and/or a curved surface through a method of preparing the nanocomposite material in which the network-type metal layer is plated on silica self-cracks by applying a silica coating solution on the substrate having a flat or curved surface, performing drying after the applying of the silica coating solution to form the silica self-cracks having random crack directions and sizes, and performing electroless metal plating on the surface of the substrate. Further, the present disclosure provides a wearable electronics carbon fiber having excellent electrical conductivity and bending resistance.

Abstract: The present disclosure relates to a metal nanoparticles impregnated activated carbon fiber for removing harmful substances, and a method of manufacturing the same. A method of manufacturing a metal nanoparticles impregnated activated carbon fiber for removing harmful substances according to the present disclosure includes an activation step of manufacturing an activated carbon fiber by heat-treating a precursor including a waste carbon fiber under a mixed atmosphere of activation gases including water vapor, carbon monoxide, nitrogen, argon, helium, or combinations thereof, and a metal containing step of containing metal in the activated carbon fiber. According to the present disclosure, a carbonization process is unnecessary since a precursor including the waste carbon fiber is used, and the metal nanoparticles impregnated activated carbon fiber may have remarkably improved adsorptive power compared to an activated carbon fiber with the same specific surface area by controlling the micropore distribution.

Abstract: A power supply apparatus including a first magnetic core, a second magnetic core having a shape symmetrical to a shape of the first magnetic core, a third magnetic core between the first and second magnetic cores, a first coil wound around at least one of the first and third magnetic cores, and a second coil wound around at least one of the second and third magnetic cores, wherein a material for the third magnetic core is different from a material for the first magnetic core or the second magnetic core.

Abstract: A single stage AC/DC converter includes a rectifier to rectify an input AC voltage and output the input AC voltage from first and second input nodes to first and second output nodes, an input capacitor connected between the first and second output nodes to store a rectified voltage and output a constant voltage, a transformer unit to transform the voltage received from the input capacitor, and transmit the voltage to a secondary side, and a power factor correction circuit to correct a power factor of a circuit. The power factor correction circuit includes a first auxiliary diode having one terminal connected with the first input node, a second auxiliary diode having one terminal connected with the second input node, and an auxiliary winding inductor connected among opposite terminals of the first and second auxiliary diodes and the first output node or the second output node.

Abstract: A power supply apparatus including a first magnetic core, a second magnetic core having a shape symmetrical to a shape of the first magnetic core, a third magnetic core between the first and second magnetic cores, a first coil wound around at least one of the first and third magnetic cores, and a second coil wound around at least one of the second and third magnetic cores, wherein a material for the third magnetic core is different from a material for the first magnetic core or the second magnetic core.