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장영조,서화일 한국기술교육대학교 2000 論文集 Vol.7 No.1
ABSTRACT This paper represents an FPGA implementation on USB Keyboard controller. USB is a serial interface to PC with 12Mbps full speed and applications for the peripheral devices are growing very widely. The architecture is designed with high modularity to devise various applications of USB. USB keyboard is classified to HID device. The design method for HID class is shown. Complex device containing mouse and ACPI function is also implemented by means of HID report to the same USB device. The keyboard controller is designed using Verilog HDL and simulated its functionality and performance. The architecture is implemented using an Altera 10KA100 FPGA and its evaluation board. The functionality is tested with direct connection to PC host and confirmed by USB compliance test program.
장영조,방정배 한국기술교육대학교 2003 論文集 Vol.10 No.1
In this paper, we improved an architecture of 2D-DWT and obtained the result of reduction hardware cost by means of sharing registers and other hardwares. Also, it makes easy to expand filter lengths using regular data flow structure. We obtained 27.5% reduction of hardware cost by proposed architecture. The improved structure is designed by using VHDL and implemented to FPGA. Finally, the result of analysis has been confirmed by showing on TFT LCD.
장영조,김영득 한국기술교육대학교 2004 論文集 Vol.10 No.2
Twofish algorithm is a 128-bit block cipher that treats a variable length key. The algorithm is implemented using VHDL and FPGA. This paper represents an implementation on Twofish algorithm that consists of whitening, permutation, S-box, MDS, PHT H function, and 16 rounds using different key. Gate count and speed can be compromised for 64-256 bits key length and number of rounds. Encryption and decryption are processed separately using the same hardware. Using pipelined architecture, en/decryption speed is enhanced 23% compared to previous research.
방사선 조사에 따른 LDPE박막의 결정구조에 미치는 특성
장영조,박재웅,김종석 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1
LDPE pelet is distilled to make 0.5 Wt% solutions and fabricated as LDPE thin film by dropping the solution onto glass substrate, and then annealed the film to be crystalline. The structure is observed as crystalline regions and non-crystalline regions. The crystalline region is exposed at radiation and as the result, there appeared degradation at the total region of the crystal structure. It is considered therefore that radiation exposure at the crystal structure is badly effected on insulation property and lifetime of materials.