Abstract: A multilayer capacitor includes a body including dielectric layers and internal electrodes and external electrodes disposed on an external surface of the body and connected to the internal electrodes. The body includes a first surface and a second surface to which the internal electrodes are exposed, the first surface and the second surface opposing each other in a first direction, a third surface and a fourth surface opposing each other in a second direction which is a direction in which the dielectric layers are stacked, and a fifth surface and a sixth surface opposing each other in a third direction. At least one of the internal electrodes include a first bottleneck structure having a first directional length of a third-directional outer region smaller than an inner region thereof and a second bottleneck structure having a third directional length of a first directional outer region smaller than an inner region thereof.

Abstract: Provided is a self-supervised learning method based on permutation invariant cross entropy. A self-supervised learning method based on permutation invariant cross entropy performed by an electronic device includes: defining a cross entropy loss function for pre-training of an end-to-end speech recognition model; configuring non-transcription speech corpus data composed only of speech as input data of the cross entropy loss function; setting all permutations of classes included in the non-transcription speech corpus data as an output target and calculating cross entropy losses for each class; and determining a minimum cross entropy loss among the calculated cross entropy losses for each class as a final loss.

Abstract: The present invention relates to a smart phone having an emergency call button, including an emergency button (110) which is engraved on a rear surface of the smart phone so as not to protrude from the rear surface and has a touch detection unit (111) provided on the rear surface of the smart phone to detect a touch signal according to manipulation of a user, and a decompression detection unit (112) provided on a lower portion of the touch detection unit (111) to detect a decompression signal according to the manipulation of the user; and an emergency call transmission unit (120) which, when the touch signal and the decompression signal are received from the emergency button (110), transmits preset emergency rescue request information to a guardian terminal (10) and an agency server (20) and records a voice coming from the scene of an accident in real time and transmits the live recording information to a mobile communication company server (30).

Abstract: An intrusion detection system and method of a wireless network providing wireless communication to one or more wireless terminal, and an intrusion detection sensor capable of detecting attacks against wireless network are provided. The intrusion detection system of a wireless network includes: an access point providing wireless communication to a wireless terminal; and an intrusion detection sensor examining packets transmitted and received between the access point and a wireless terminal according to a predetermined detection rule. The access point transmits confirmation information on whether or not an event packet, including critical information on whether or not a wireless line connection between the access point and the wireless terminal is established, is transmitted, to the intrusion detection sensor, and the intrusion detection sensor examines an event packet by using the confirmation information.

Abstract: A method and system for updating a radio frequency identification (RFID) tag value of a transferred object are provided. The method includes: transferor's RFID reader reading an RFID tag attached to an object being transferred and extracting a first RFID tag value; deciphering an open RFID value through the extracted first RFID tag value; the transferor's RFID reader transmitting the first RFID tag value and open RFID value to an RFID reader of a transferee receiving the object with the attached RFID tag; and the transferee's RFID reader extracting a second RFID tag value of the RFID tag attached to the transferred object, and by using the received first RFID tag value and open RFID value, updating the second RFID tag value. Accordingly, even with using the RFID, the property right of the object with an attached RFID tag can be transferred such that the security can be maintained.

Abstract: A server certificate verification method in a terminal during. Extensible Authentication Protocol authentication for Internet access is provided, the method including (a) receiving a server certificate from a wireless LAN authentication server, and transmitting a server certificate verification request message of the server certificate to a wireless LAN authentication server via a wireless LAN access server; (b) transmitting by the wireless LAN authentication server an On-line Certificate Status Protocol request message to an On-line Certificate Status Protocol server to verify the server certificate; (c) receiving a result of the server certificate verification performed by the OCSP server using an Extensible Authentication Protocol packet from the wireless LAN authentication server; and (d) determining whether the result of the server certificate verification is valid.