Abstract: The present disclosure relates to an ultraviolet light-blocking composition containing a centipede grass extract and a cosmetic composition and, more specifically, to an ultraviolet light-blocking composition comprising a centipede grass (Eremochloa ophiuroides) leaf extract as an active ingredient; and a cosmetic composition containing the ultraviolet light-blocking composition.

Abstract: A power supply circuit in an electronic device is provided. The power supply circuit includes a connector configured to receive external power and IDentifier (ID) data, a first switch disposed between the connector and a system of the electronic device, a second switch connected to the system, and a controller configured to control ON and OFF states of each of the first and second switches based on the ID data.

Abstract: The present disclosure relates to an electronic device and a method of operating the same. The electronic device includes a necklace band, and a first component connected to the necklace band. The first component includes a first magnet located on a first surface of a housing of the first component, a first connection unit located on the first surface of the housing of the first component, and electrically connectable to a second connection unit located on a first surface of a housing of a second component, and a controller configured to connect the first connection unit and the second connection unit when the first magnet is attached to a second magnet located on the first surface of the housing of the second component, and receive power from the second component through the first connection unit connected with the second connection unit.

Abstract: A method and apparatus for controlling battery charging in an electronic device are provided. The electronic device may include a charging module, a connector, and one or more processors. Upon detecting charging by a power source, the one or more processors control the charging module to perform the charging of a battery cell by a first charging current through a first port of the connector. The one or more processors detect whether a voltage is applied through a second port of the connector, and if so, the one or more processors control the charging module to perform the charging of the battery cell using a second charging current through the first port and the second port of the connector.

Abstract: The present disclosure relates to an electronic device and a method of operating the same. The electronic device includes a necklace band, and a first component connected to the necklace band. The first component includes a first magnet located on a first surface of a housing of the first component, a first connection unit located on the first surface of the housing of the first component, and electrically connectable to a second connection unit located on a first surface of a housing of a second component, and a controller configured to connect the first connection unit and the second connection unit when the first magnet is attached to a second magnet located on the first surface of the housing of the second component, and receive power from the second component through the first connection unit connected with the second connection unit.

Abstract: A method and apparatus for controlling battery charging in an electronic device are provided. The electronic device may include a charging module, a connector, and one or more processors. Upon detecting charging by a power source, the one or more processors control the charging module to perform the charging of a battery cell by a first charging current through a first port of the connector. The one or more processors detect whether a voltage is applied through a second port of the connector, and if so, the one or more processors control the charging module to perform the charging of the battery cell using a second charging current through the first port and the second port of the connector.

Abstract: The exemplary embodiments of the present invention include forming a photoconductor thin film on a front surface of a substrate; forming a photoconductor thin film pattern by patterning the photoconductor thin film; and forming a metal electrode on the photoconductor thin film pattern.

Abstract: A power supply circuit in an electronic device is provided. The power supply circuit includes a connector configured to receive external power and IDentifier (ID) data, a first switch disposed between the connector and a system of the electronic device, a second switch connected to the system, and a controller configured to control ON and OFF states of each of the first and second switches based on the ID data.

Abstract: A device characteristics measurement method using an all-optoelectronic terahertz photomixing system includes: calculating power of an antenna of a transmitter by adding a matching condition between output impedance of the photomixer and input impedance of the antenna of the transmitter to power of the photomixer of the transmitter; calculating power of an antenna of a receiver based on the power of the antenna of the transmitter; and outputting the power of the antenna of the transmitter and the power of the antenna of the receiver so as to analyze device characteristics of the photomixer and the antenna of the transmitter.

Abstract: The exemplary embodiments of the present invention include forming a photoconductor thin film on a front surface of a substrate; forming a photoconductor thin film pattern by patterning the photoconductor thin film; and forming a metal electrode on the photoconductor thin film pattern.

Abstract: Provided are a terahertz wave transmission and reception (Tx/Rx) module package and method of manufacturing the same. The complete and separate terahertz wave Tx/Rx module package is implemented by simply aligning a silicon ball lens, a photoconductive antenna and a focusing lens, and thus facilitates generation or measurement of a terahertz wave. The terahertz wave Tx/Rx module package and method can remarkably reduce time and cost required to build a terahertz wave generation and measurement system, and simplify and miniaturize the terahertz wave generation and measurement system. In addition, characteristics of a terahertz wave generated by the photoconductive antenna can be simply measured. Furthermore, the terahertz wave Tx/Rx module package can be stored and transported with a photoconductive antenna, a silicon ball lens and a focusing lens kept aligned as they are, and also it is possible to minimize pollution of terahertz wave devices caused by surroundings.

Abstract: A power supply circuit and a power supply method using the same are provided. The power supply circuit includes a power interface to which power is supplied, a converter and a charging circuit connected to the power interface, a battery for receiving power from the charging circuit and for providing stored power to a system, the system for selectively receiving power from the battery or the system, a main switch disposed between the battery and the system for selectively interrupting the power of the battery to the system, and a control logic unit for switching the main switch according to presence of power supplied from the power interface.

Abstract: Provided are a terahertz wave transmission and reception (Tx/Rx) module package and method of manufacturing the same. The complete and separate terahertz wave Tx/Rx module package is implemented by simply aligning a silicon ball lens, a photoconductive antenna and a focusing lens, and thus facilitates generation or measurement of a terahertz wave. The terahertz wave Tx/Rx module package and method can remarkably reduce time and cost required to build a terahertz wave generation and measurement system, and simplify and miniaturize the terahertz wave generation and measurement system. In addition, characteristics of a terahertz wave generated by the photoconductive antenna can be simply measured. Furthermore, the terahertz wave Tx/Rx module package can be stored and transported with a photoconductive antenna, a silicon ball lens and a focusing lens kept aligned as they are, and also it is possible to minimize pollution of terahertz wave devices caused by surroundings.

Abstract: A mode-locked fiber laser and a fiber amplifier using a single pump laser, the fiber laser using a pump source to generate soliton optical short pulse and the fiber amplifier amplifying the optical short pulse. The mode-locked fiber laser and fiber amplifier use a single pump laser in accordance with an embodiment of the present invention that includes a tunable directional coupler, a mode-locked fiber laser, and an optical amplifier. The tunable directional coupler is connected to the pump source. The mode-locked fiber laser receives the pump output of the pump source and generates a soliton optical pulse. The mode-locked fiber laser is connected to an output port of the tunable directional coupler. The optical amplifier receives the pump output of the pump source, receives the soliton optical pulse generated by the mode-locked fiber laser, and amplifies the soliton optical pulse. The optical amplifier is connected to the other output port of the tunable directional coupler.