Samsung Electronics Co., Ltd.

Xyz, Inc.

Daehan Ceramics Co., Ltd.

Jong Keun Lee

Dong Jin Kim

Hyun-kyu Yun

Sung Jae Hwang

Kwan Young Kim

Kun-ho Keum

Myoung Jun Lee

Kyu Jung Jo

Min Sup Kim

Kun-Ho Keum

A method of controlling a robot arm for performing coffee drip includes: an arrangement checking operation of checking an arrangement of a dripper, a coffee powder container, a cup, and a kettle; a coffee powder providing operation of, when the arrangement of the cup is sensed, gripping the coffee powder container and providing a coffee powder contained in the coffee powder container to the dripper, by using the robot arm; a dripping operation of, when the coffee powder is provided to the dripper, gripping the kettle and performing a drip operation using any one of a plurality of predetermined methods, by using the robot arm; and a discharging operation of, when the dripping operation is completed, gripping the cup and transferring the cup to a discharge position.

Method and system for controlling robot arm for performing coffee drip

Disclosed is a display apparatus which performs wireless communication with a target control device and a peripheral display apparatus. The display apparatus may include communication circuitry which transmits to the peripheral display apparatus a request message requesting a determination of whether an operation command of the target control device is received when the target control device is operated; and a controller configured to perform a function corresponding to the operation command of the target control device based on a response message to the request message. In the display apparatus and a control system and method for the same, the display apparatus is able to be controlled through a control device paired with a different display apparatus, and since a re-pairing process is not performed, an additional operation in which a user performs the re-pairing process may be removed, and thus user convenience may be improved.

Display apparatus and control system and method for same

Provided are a method of manufacturing an alumina-based abrasive grain, which includes preparing boehmite powder and activated alumina powder as starting materials, forming a sol by wet-blending and crushing the boehmite powder, the activated alumina powder, a solvent and a deflocculant, heating the sol at a first temperature which is higher than a room temperature and lower than a boiling point of the solvent and stirring the sol so as not to generate a precipitate, forming a gel by heating the sol at a second temperature higher than the first temperature at which a viscosity of the sol is increased and the sol becomes a paste, blending the gel with an organic solvent and performing wet crushing on the resulting mixture, preparing a powder by drying the wet-crushed gel, blending a binder and a solvent with the dried product, which is the powder, and molding the resulting mixture, calcining the molded product, performing dry crushing on the calcined product, and sintering the dry-crushed product to transform activated alumina and boehmite contained therein to an &#x3b1;-AlOcrystal phase, and an alumina-based abrasive grain manufactured thereby. As a result, an alumina-based abrasive grain which is highly dense, has a high hardness, and exhibits a high purity may be manufactured using boehmite powder and activated alumina powder.

Method of manufacturing alumina-based abrasive grain and alumina-based abrasive grain manufactured thereby

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Seoul, South Korea

Jong Keun Lee