Abstract: An embodiment of the present specification provides a rubber composition for a tire tread, comprising: a rubber polymer; a petroleum resin; and a functionalized processing aid, wherein the functionalized processing aid is a bond of a silane-based compound and a cardanol-derived structure, represented by the following formula 1: (R1)3Si—R2—Z-(E)n??[Formula 1] wherein R1, R2, Z, E and n are as defined in the specification, and a method of manufacturing the same.

Abstract: An embodiment of the present specification provides a rubber composition for a tire tread, comprising: a rubber polymer; a petroleum resin; and a functionalized processing aid, wherein the functionalized processing aid is a bond of a silane-based compound and a cardanol-derived structure, represented by the following formula 1: (R1)3Si—R2—Z-(E)n??[Formula 1] wherein R1, R2, Z, E and n are as defined in the specification, and a method of manufacturing the same.

Abstract: Provided are a selective verification system and method of zero-knowledge proofs for scalability of a blockchain, the system including: a proof unit generating a proof as a result of Prove( ) for a fact to be proved, and generating a transaction in the blockchain and storing the proof; a verification unit executing, when a new proof is registered, off-chain Verify( ) for a contract, a vk, and the proof, standing by when a result of execution is a value of true, and after a preset time elapses, determining that the proof is true; and an operation unit executing on-chain Verify( ) in response to a request for verification from the verification unit and imposing a penalty when a result of execution is a value of false.