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Simulation-based Design Verification for High-performance Computing System
Jeong Taikyeong T. Korea Multimedia Society 2005 멀티미디어학회논문지 Vol.8 No.12
This paper presents the knowledge and experience we obtained by employing multiprocessor systems as a computer simulation design verification to study high-performance computing system. This paper also describes a case study of symmetric multiprocessors (SMP) kernel on a 32 CPUs CC-NUMA architecture using an actual architecture. A small group of CPUs of CC-NUMA, high-performance computer system, is clustered into a processing node or cluster. By simulating the system design verification tools; we discussed SMP OS kernel on a CC-NUMA multiprocessor architecture performance which is $32\%$ of the total execution time and remote memory access latency is occupied $43\%$ of the OS time. In this paper, we demonstrated our simulation results for multiprocessor, high-performance computing system performance, using simulation-based design verification.
An Adaptive Steganography of Optical Image using Bit-Planes and Multi-channel Characteristics
강진석,Taikyeong T. Jeong 한국광학회 2008 Current Optics and Photonics Vol.12 No.3
We proposed an adaptive steganography of an optical image using bit-planes and multichannel characteristics. The experiment’s purpose was to compare the most popular methods used in optical steganography and to examine their advantages and disadvantages. In this paper we describe two digital methods: the first uses less significant bits (LSB) to encode hidden data, and in the other all blocks of n×n pixels are coded by using DCT (Digital Cosine Transformation), and two optical methods: double phase encoding and digital hologram watermarking with double binary phase encoding by using IFTA(Iterative Fourier Transform Algorithm) with phase quantization. Therefore, we investigated the complexity on bit plane and data, similarity insert information into bit planes. As a result, the proposed method increased the insertion capacity and improved the optical image quality as compared to fixing threshold and variable length method.