Abstract: Provided is a plasma control method including applying gas to a chamber having a wafer loaded therein, generating plasma by applying both radio frequency (RF) power associated with a first voltage at a first frequency and a second voltage at a second frequency that is lower than the first frequency to the chamber for a first time, cutting off the RF power after the first time elapses, continuously applying the second voltage of the second frequency to the chamber for a second time, cutting off the second voltage after the second time elapses, continuously maintaining an off state of the RF power and an off state of the voltage for a third time, and performing an etching process on the wafer by using the plasma formed by the RF power and the second voltage after the third time elapses, wherein the RF power is a sine wave, and the second voltage is a square wave of a periodic pulse form.

Abstract: A method, performed by a hub device, of storing a voice assistant model for controlling a device includes receiving information about a first device connected to the hub device, requesting a voice assistant server to update a device determination model stored in the hub device; receiving the updated device determination model from the voice assistant server and storing the received updated device determination model; requesting, from the voice assistant server, information about a function determination model corresponding to the first device; receiving the information about the function determination model corresponding to the first device from the voice assistant server, and determining whether to store the function determination model in the hub device based on the received information; and based on the function determination model being determined to be stored in the hub device, storing, in the hub device, the function determination model corresponding to the first device.

Abstract: A method, performed by a hub device, of storing a voice assistant model for controlling a device includes receiving information about a first device connected to the hub device, requesting a voice assistant server to update a device determination model stored in the hub device; receiving the updated device determination model from the voice assistant server and storing the received updated device determination model; requesting, from the voice assistant server, information about a function determination model corresponding to the first device; receiving the information about the function determination model corresponding to the first device from the voice assistant server, and determining whether to store the function determination model in the hub device based on the received information; and based on the function determination model being determined to be stored in the hub device, storing, in the hub device, the function determination model corresponding to the first device.

Abstract: An epoxy compound having an aromatic ring represented by Formula 1 or Formula 2, a composition prepared from the epoxy compound, a semiconductor device prepared from the epoxy compound, an electronic device prepared from the epoxy compound, an article prepared from the epoxy compound, and a method of preparing the epoxy compound: E1-(M1)a1-(L1)b1-(M2)a2-L2-A1-L3-(M3)a3-(L4)b2-(M4)a4-E2??Formula 1 E3-(A2)c1-(L5)b3-(M5)a5-L6-(M6)a6-L7-(M7)a7-(L8)b4-(A3)c2-E4??Formula 2 In Formulae 1 and 2, M1, M2, M3, M4, M5, M6, M7, A1, A2, A3, L1, L2, L3, L4, L5, L6, L7, L8, E1, E2, E3, E4, a1, a2, a3, a4, a5, a6, a7, b1, b2, b3, b4, c1, and c2 are the same as defined in the detailed description.

Abstract: An electronic apparatus includes a communication interface; a memory configured to store at least one instruction; and a processor configured to execute the at least one instruction to: receive a text corresponding to a user utterance and information regarding a first external device; obtain a plurality of weights of a plurality of elements related to the first external device; identify a second external device for obtaining response information; control the communication interface to transmit the text corresponding to the user utterance to the second external device; receive first response information regarding the user utterance from the second external device; obtain second response information; and control the communication interface to transmit the second response information to the first external device.

Abstract: A bill discrimination apparatus and method using a radio frequency (RF) signal that includes a transmission antenna radiating the radio frequency (RF) signal; a reception antenna receiving the RF signal from the transmission antenna; and a control unit providing the RF signal to the transmission antenna, and detecting a thickness of a bill, a state of the bill, or a presence of a foreign object on the bill based on a voltage of the RF signal transmitted through the bill and received by the reception antenna when the bill is between the transmission antenna and the reception antenna. The RF signal has a preset, specific frequency.

Abstract: A bill discrimination apparatus and method using a radio frequency (RF) signal that includes a transmission antenna radiating the radio frequency (RF) signal; a reception antenna receiving the RF signal from the transmission antenna; and a control unit providing the RF signal to the transmission antenna, and detecting a thickness of a bill, a state of the bill, or a presence of a foreign object on the bill based on a voltage of the RF signal transmitted through the bill and received by the reception antenna when the bill is between the transmission antenna and the reception antenna. The RF signal has a preset, specific frequency.

Abstract: There is provided an apparatus and a method of maintaining, repairing and/or optimizing a banknote validator using a network. The apparatus includes a banknote validator configured to count banknotes or determine genuineness or fitness of the banknotes, a wired or wireless network connection unit configured to relay or transmit one or more first data items and/or software, first data items and software updating, maintaining and/or repairing the banknote valuator and including security information, and a server configured to receive one or more second data items and software version information from the banknote validator and optionally transmit maintenance and repair results to the banknote validator through the wired or wireless network connection unit. The wired or wireless network connection unit may comprise a predetermined smart device or a web adjuster.

Abstract: There is provided an apparatus and a method of maintaining, repairing and/or optimizing a banknote validator using a network. The apparatus includes a banknote validator configured to count banknotes or determine genuineness or fitness of the banknotes, a wired or wireless network connection unit configured to relay or transmit one or more first data items and/or software, first data items and software updating, maintaining and/or repairing the banknote valuator and including security information, and a server configured to receive one or more second data items and software version information from the banknote validator and optionally transmit maintenance and repair results to the banknote validator through the wired or wireless network connection unit. The wired or wireless network connection unit may comprise a predetermined smart device or a web adjuster.