Samsung Electronics Co., Ltd.

Seagate Technology International

Hanyang Hak Won Co., Ltd.

Yong-Soo Kim

Kyung Ho Kim

Sang-wook Park

Mi-jung Noh

Yong-ki Lee

Joo-sun Hong

Baik-hee Han

Yun-hyeok Choi

Karpinskyy Bohdan

Kitak Kim

Ji-Hwan Chung

Kyu Nam Cho

Ha Yong Kim

An apparatus for testing a random number generator includes a correlation test circuit and a randomness determination circuit. The correlation test circuit extracts a first plurality of bit pairs each including two bits spaced apart from each other by a first distance in a bit stream generated by the random number generator, obtains a first sum of differences between respective two bits of the first plurality of bit pairs, and obtains a second sum of differences between respective two bits of a second plurality of bit pairs, the second plurality of bit pairs each including two bits spaced apart from each other by a second distance, different from the first distance, in the bit stream. The randomness determination circuit determines a randomness of the bit stream, based on the first sum and the second sum.

Randomness test apparatus and method for random number generator

A method of centering a disk of a hard disk drive includes arranging a disk on an upper end portion of a hub on which a plurality of disks are rotatably assembled, and assembling the disk on the hub by vibrating the hub. Accordingly, the disks and/or spacers may be easily assembled on the hub, a time of centering may be relatively much reduced, and a superior centering quality may be obtained.

Method of centering a disk of hard disk drive

A remote control device that can increase the convenience of a user, a display processing apparatus having the same and a method of driving the same are provided. The remote control device has a moving object and a vibration member generating a vibration. If a vibration is generated as the moving object moves, the remote control generates a signal in response to a moving path of the moving object. The remote control provides the generated signal to an electric device so as to remotely control the electric device. Accordingly, a user can operate the remote control only by moving the remote control so that the user's convenience is increased.

Remote control device, image processing apparatus having the same and method of driving the same

A process for gas-phase etching of actinide oxides from a substrate by using plasma power comprising the steps of: a) preheating actinide oxides on the substrate within a process chamber filled with fluorine-containing gas and exposing it to plasma power, and subsequently b) etching actinide oxides from the substrate using a plasma gas-phase reactant system.

Effective dry etching process of actinide oxides and their mixed oxides in CF4/O2/N2 plasma

A data sector reassigning technique in a hard disk drive detects of a soft defect in a hard disk drive having a plurality of data sectors and an error correction capability. An error rate is calculated during a data read, and a soft defect is detected by varying the error correction capability according to the calculated error rate. A read error of the detected soft defect is recovered by setting the error correction capability to a maximum level if the read error is not recovered, and a spare sector is reassigned to substitute for a corresponding sector.

Technique for reassigning data sector by detecting soft defect

Growing community of inventors

Seoul, South Korea

Yong-Soo Kim