Abstract: An electronic price indicator according to an embodiment includes a display displaying product information, an NFC module configured to communicate with a user terminal, a Bluetooth module configured to communicate with the user terminal, and a processor configured to control the display to display the product information received from the user terminal through the Bluetooth module. The processor is further configured to release a sleep mode when receiving an interrupt from the user terminal through the NFC module, and perform Bluetooth communication with the user terminal by initiating a scan for a predetermined period of time to receive an advertising signal from the user terminal.

Abstract: The present invention relates to a device for measuring residual stress and hardness. Residual stress remaining in a metallic material due to deformation, thermal stress, or the like is a cause of various problems including degradation of mechanical properties such as fatigue strength and fracture properties and difficulty in post-processing. It is very difficult to derive a calibration curve when measuring stress by an existing non-destructive Barkhausen noise measurement method. When cross points of Barkhausen noise measurements for three or more stresses are not at one position, calibrated curves can be easily found by scaling the Barkhausen noise measurements by using calibration equations of the present invention to collect the cross points at a unique position, thereby providing a practical method of easily measuring stress of a metal by a Barkhausen noise measurement method.

Abstract: An apparatus for analyzing influence of electromagnetic waves comprises an electromagnetic wave radiation unit configured to radiate electromagnetic waves, a drone control unit configured to transmit to a target drone control information for controlling the target drone, an information receiving unit configured to receive status information indicating an operation state of the target drone as a response to the control information and an electromagnetic wave influence analyzing unit configured to determine the influence of the electromagnetic waves on the target drone by comparing the control information and the status information.

Abstract: An apparatus for analyzing influence of electromagnetic waves comprises an electromagnetic wave radiation unit configured to radiate electromagnetic waves, a drone control unit configured to transmit to a target drone control information for controlling the target drone, an information receiving unit configured to receive status information indicating an operation state of the target drone as a response to the control information and an electromagnetic wave influence analyzing unit configured to determine the influence of the electromagnetic waves on the target drone by comparing the control information and the status information.

Abstract: A pulsed magnet includes a cylindrical coil part having a hollow opening, and amorphous metal modules disposed along an outer circumference of the coil part and extending in a normal direction, which results in facilitation of cooling and minimization of generation of an eddy current.

Abstract: A pulsed magnet includes a cylindrical coil part having a hollow opening, and amorphous metal modules disposed along an outer circumference of the coil part and extending in a normal direction, which results in facilitation of cooling and minimization of generation of an eddy current.