Abstract: Disclosed is a natural language processing (NLP) based call monitoring method for preventing voice phishing. The method includes the operations of: verifying a calling number ID when a call is received; when a voice signal of a caller is received, recognizing the caller's voiceprint, and firstly confirming whether the recognized voiceprint matches the voiceprint of a known voice phisher; based on the caller's speech keywords and speech patterns, secondly confirming whether voice phishing is or is not occurring; determining the caller as a voice phisher based on the risk score derived from the first confirmation and the second confirmation; and when the caller is determined as a voice phisher, taking corresponding measures. Therefore, frequency of damages due to voice phishing can be reduced.

Abstract: Disclosed herein are an apparatus and method for providing sensor data in a sensor device based on a blockchain. A method for providing sensor data in a sensor device based on a blockchain may include creating a device record using encrypted device identification information, registering the device record in the blockchain, creating an event record using event information collected from a sensor, registering the header of the event record, including information about a link to the device record, in the blockchain, and distributing the body of the event record, the body being linked to the header of the event record.

Abstract: A complex number quantization-based audio signal encoding method may comprise: estimating a scale factor for each subband of an input audio signal; performing complex magnitude scaling for each subband based on the scale factor; and performing polar quantization on a complex frequency coefficient for each subband, wherein the performing the polar quantization for each subband comprises applying two or more different magnitude quantization techniques based on the magnitude of the complex frequency coefficient scaled for each subband.

Abstract: An inkjet printing apparatus, method of printing ink using the same and method of fabricating display device are provided. The method of printing ink includes: ejecting ink in which a plurality of particles is dispersed from an inkjet head; irradiating the ejected ink with a first light and a second light having different wavelengths to acquire data on a first exit light and a second exit light emitted from the ink; calculating a concentration of the particles in the ink from the data on the first exit light and the second exit light; and checking whether the concentration is out of an error range from a reference value, where the first light has a wavelength of about 500 nm or less, and the second light has a wavelength of about 1000 nm or more.

Abstract: Disclosed are an apparatus and a method for Internet of Things (IoT) device security. The method includes unifying a port in a first IoT device for communication, receiving, by the first IoT device, a packet from a second IoT device through the port, identifying whether the packet in the first IoT device is in a preset packet form, verifying content of the packet in the first IoT device when the packet is in the preset packet form, and opening the port for providing a service in the first IoT device when the verifying of the packet content is successful.

Abstract: An antenna device is provided. The antenna device includes a first radiating conductor including a feeding portion and a radiating portion extending from the feeding portion, the feeding portion including a feeding terminal and a shorting pin, a ground electrically connected with the first radiating conductor via the shorting pin and configured to provide a reference potential for the first radiating conductor, and a first switch circuit provided on a side of the radiating portion and configured to selectively connect the radiating portion with the ground. The first radiating conductor is configured to form at least part of an inverted-F antenna structure when the first switch circuit is open and to form at least part of a loop antenna structure when the first switch circuit is closed.

Abstract: An antenna device is provided. The antenna device includes a first radiating conductor including a feeding portion and a radiating portion extending from the feeding portion, the feeding portion including a feeding terminal and a shorting pin, a ground electrically connected with the first radiating conductor via the shorting pin and configured to provide a reference potential for the first radiating conductor, and a first switch circuit provided on a side of the radiating portion and configured to selectively connect the radiating portion with the ground. The first radiating conductor is configured to form at least part of an inverted-F antenna structure when the first switch circuit is open and to form at least part of a loop antenna structure when the first switch circuit is closed.