Abstract: Proposed is a rubber composition for a tire tread, which includes: a solution-polymerized elastomer having a conjugated diene-based monomer unit, a solution-polymerized elastomer having an aromatic vinyl monomer unit and a conjugated diene-based monomer unit, or a combination thereof, at 100 parts by weight; and a plasticizer containing an aromatic petroleum resin and an aliphatic olefin polymer, at 10 to 50 parts by weight. Further, a manufacturing method of the rubber composition for a tire tread is proposed.

Abstract: There is provided a method for inputting a Chinese word based on a first-input Chinese character, the method comprising: receiving a first-input Chinese character of a first letter of a target word from a user; displaying at least some of recommended Chinese words on a word-recommending interface of a device, wherein each recommended Chinese word is composed of at least one letter and has a letter including the first-input Chinese character; and displaying a Chinese word selected from the recommended Chinese words by the user on a selected-word display interface of the device.

Abstract: Provided is a keyboard for typing Chinese character, which includes a first base unit key group including subgroups of base unit keys having similar shapes to each other, a second base unit key group including base unit keys having symmetrical shapes with each other, and a third base unit key group including subgroups of base unit keys which are different from the base unit keys included in the first base unit key group and having similar shapes to each other.