Abstract: A semiconductor device is provided. The semiconductor device comprising a multi-channel active pattern on a substrate, a high dielectric constant insulating layer formed along the multi-channel active pattern on the multi-channel active pattern, wherein the high dielectric constant insulating layer comprises a metal, a silicon nitride layer formed along the high dielectric constant insulating layer on the high dielectric constant insulating layer and a gate electrode on the silicon nitride layer.

Abstract: A semiconductor device including: a first transistor which include a first gate stack on a substrate; and a second transistor which includes a second gate stack on the substrate, wherein the first gate stack includes a first ferroelectric material layer disposed on the substrate, a first work function layer disposed on the first ferroelectric material layer and a first upper gate electrode disposed on the first work function layer, wherein the second gate stack includes a second ferroelectric material layer disposed on the substrate, a second work function layer disposed on the second ferroelectric material layer and a second upper gate electrode disposed on the second work function layer, wherein the first work function layer includes the same material as the second work function layer, and wherein an effective work function of the first gate stack is different from an effective work function of the second gate stack.

Abstract: A method for distributing collectable ownership based on blockchain networks, including steps of: (a) an online transaction server, in response to acquiring a distribution request for a collectable from an owner, (i) generating an ownership token contract, (ii) generating a contract registering transaction, and (iii) broadcasting the contract registering transaction to a blockchain network, to thereby instruct the blockchain nodes to (iii-1) verify the contract registering transaction, (iii-2) register the ownership token contract, included in the contract registering transaction in the blockchain network, and (iii-3) transfer an ownership token contract ID corresponding to the ownership token contract registered in the blockchain network to the online transaction server.

Abstract: A method for distributing collectable ownership by using multi-signatures based on blockchain networks, including steps of: (a) an online transaction server, in response to acquiring a distribution request for a collectable from an owner, (i) generating an ownership token contract, (ii) generating a contract registering transaction, and (iii) broadcasting the contract registering transaction to a blockchain network, to thereby instruct the blockchain nodes to (iii-1) verify the contract registering transaction, (iii-2) register the ownership token contract, included in the contract registering transaction in the blockchain network, and (iii-3) transfer an ownership token contract ID corresponding to the ownership token contract registered in the blockchain network to the online transaction server.

Abstract: According to the present invention, a method for delegating a login via PKI-based authentication for a login request of a user by using a smart contract and a blockchain database is provided.

Abstract: According to the present invention, a method for delegating a login via PKI-based authentication for a login request of a user by using a smart contract and a blockchain database is provided.

Abstract: Provided are an authentication method that includes connecting an optical disc drive (ODD) for driving a medium and a host device for reproducing contents stored in the medium using an interface. An authentication for reproducing the contents is performed by mutually exchanging data between the host device and the ODD via the authentication area of the ODD for storing the data. Accordingly, the ODD may convert a file from the optical disc, which is in an intrinsic format, into a format that is recognizable by a host device.

Abstract: Provided is a system including an optical disc drive and a user terminal, and a method of processing a file. The optical disc drive may be connected to the user terminal. According to various aspects, the user terminal may include a file system for identifying a file format of the file recorded on an optical disc. The user terminal may search for a file recorded in an optical disc via the file system, and play the file through downloading.

Abstract: Provided is a method and an apparatus for setting a virtual disc status of an optical disc drive. While set to the virtual disc status, the optical disc drive does not detect if an optical disc is present in the optical disc drive in response to the optical disc drive being powered on. Accordingly, power consumption and noise may be reduced.

Abstract: Provided is a method and an apparatus for setting a virtual disc status of an optical disc drive. While set to the virtual disc status, the optical disc drive does not detect if an optical disc is present in the optical disc drive in response to the optical disc drive being powered on. Accordingly, power may be consumed and noise may be reduced.

Abstract: Provided are an authentication method that includes connecting an optical disc drive (ODD) for driving a medium and a host device for reproducing contents stored in the medium using an interface. An authentication for reproducing the contents is performed by mutually exchanging data between the host device and the ODD via the authentication area of the ODD for storing the data. Accordingly, the ODD may convert a file from the optical disc, which is in an intrinsic format, into a format that is recognizable by a host device.

Abstract: Provided is a system including an optical disc drive and a user terminal, and a method of processing a file. The optical disc drive may be connected to the user terminal. According to various aspects, the user terminal may include a file system for identifying a file format of the file recorded on an optical disc. The user terminal may search for a file recorded in an optical disc via the file system, and play the file through downloading.

Abstract: The present invention relates to a method for preparing high-purity alpha-lithium aluminate (?-LiAlO2). More specifically, the invention relates to a method for preparing alpha-lithium aluminate, which comprises mixing Al(OH)3 and Li2CO3 at a molar ratio of from 1:1 to 3:1 and heat-treating the mixture at a temperature of 500-800° C. and which can prepare high-purity alpha-lithium aluminate without needing to carry out a washing process.