Earticle

High Performance Computer (also called "supercomputer") is a computer which can process the complex and large-scale operation in computational science. In general, High Performance Computer represents the top 500 computers which is based on the computer performance in the world. After the successful commercialization of CDC6600 which has the 9MFLOPS performance in 1964, TFLOPS and PFLOPS High Performance Computer have been developed. High Performance Computer is the public resource which can be developed and provided by government. For the efficient application of High Performance Computer, government has to support the related activities such as research, resource allocation, and professional manpower training. To build a basis of the development of High Performance Computing can improve the quality of life and develop the national economy. For this reason, Korean government preceded the establishment of law for national supercomputing promotion from 2009. As a result of this effort, Korean government enacted the 'National Supercomputing Promotion Act' in 2011. This study provides the domestic and international trend of High Performance Computer, and analyses the major contents of National Supercomputing Promotion Act. This effort will be helpful to propose the strategy in order to provide more efficient service as a momentum of national supercomputing center.

We propose a new development for calculating a computer-generated hologram (CGH) through the use of multiple general-purpose graphics processing units (GPGPUs). For optimization of the implementation, CGH parallelization, object point tiling, memory selection for object point, hologram tiling, CGMA (compute to global memory access) ratio by block size, and memory mapping were considered. The proposed CGH was equipped with a digital holographic video system consisting of a camera system for capturing images (object points) and CPU/GPGPU software (S/W) for various image processing activities. The proposed system can generate about 37 full HD holograms per second using about 6K object points.

We can easily buy network system for high performance micro-processor, progress computer architecture is caused of high bandwidth and low delay time. Coupling PC-based commodity technology with distributed computing methodologies provides an important advance in the development of single-user dedicated systems. Lately Network is joined PC or workstation by computers of high performance and low cost. Than it make intensive that Cluster system is resembled supercomputer. Unix, Linux, BSD, NT(Windows series) can use Cluster system OS(operating system). I'm chosen linux gain low cost, high performance and open technical documentation. This paper is benchmark performance of Beowulf clustering by UltraSPARC-1K(64bit-RISC processor). Benchmark tools use MPI(Message Passing Interface) and NetPIPE. Beowulf is a class of experimental parallel workstations developed to evaluate and characterize the design space of this new operating point in price-performance.

The performance of modern mainframe computers keeps increasing due to the advances in the semiconductor technology. However, the quest for the faster computer has never been satisfied. To overcome the discrepancy in the supply and demand, we studied a high performance computer architecture utilizing a three-dimensional Holographic Data Storage Systems (HDSS) as a secondary storage system. The HDSS can achieve a high storage density by utilizing the third dimension. Furthermore, the HDSS can exploit the parallelism by processing the two-dimensional data in a single step. To compare the performance of the HDSS with the conventional hard disk based storage system, we modeled the HDSS using the DiskSim simulation engine and performed the simulation study. Results showed that the HDSS can improve the access time by 1.7 times.

본 논문에서는 홀로그램을 실시간으로 생성하기 위하여 수정된 디지털 홀로그램(computer-generated hologram, CGH) 수식을 재정의 하여 3단계로 나누고 2차원 블록 단위 기반의 컴퓨터 생성 홀로그램 생성기의 하드웨어 구조를 제안하였다. 유효광원의 대한 z축 항에 대하여 연산하는 공통항 연산기와 x,y축을 연산하는 죄표값 연산기 마지막으로 각 화소의 대하여 연산하는 화소값 연산기로 이루어진 하드웨어를 제안하고 구현 하였다. 구현한 하드웨어는 $32{\times}32$ 중간 블록의 구조를 가질 때 기존 연구에 비하여 86%이상의 DSP블록을 줄일 수 있다.

본 연구에서는 컴퓨터 실습교육 학습자의 관점에서 교육학에서의 Holton이론과 심리학에서의 TRA(Theory of Reasoned Action)을 통합 적용하여 이들의 학습 성과에 영향을 미치는 요인들을 탐색하였다. 서울 소재 총7개의 실업계 고둥학교를 대상으로 604개의 유효설문 자료를 수집하였으며, 분석방법으로는 사회과학에서 원용되고 있는 구조방정식모델을 적용하였다. 구조방정식모델 분석을 통해 나타난 연구결과는 연구모형에서 제안한 바대로 학습자반응, 학습자동기, 학습자능력, 주관적 규범, 학습자태도, 학습내용, 학습의도, 학습행위가 모두 학습 성과에 영향을 미치는 것으로 나타났다. 본 연구는 심리학 및 교육학에서 각각 적용되어 온 TRA 이론과 Holton 이론의 통합을 시도함으로써 학습 성과를 결정할 수 있는 요인들을 규명한 측면에서 학술적 시사점을 찾을 수 있다. 또한 실무적인 측면에서는 본 연구의 분석결과를 토대로 향후 컴퓨터 실습교육의 효과적인 운영과 문제점 개선에 도움이 될 것으로 기대할 수 있다.

The purpose of this study is to explore which factors influence the performance of computer practice-education in vocational high schools. We collected 604 response data from total 7 vocational high schools in Seoul City to test empirical analysis using SEM(Structural Equation Modeling) frequently used in social-science area. According to our results, all independent variables(learner's response learner's motivation, learner's attitude, learning contents, intention to learn, learner's ability and learning behavior) were found positively influencing learning performance of students. Based upon them we contributed our research model to combine TRA theory in psychology with Holton theory for academic implications. And also, from the perspective of practical implication, we can expect that our results will provide some useful guidelines for operating effective computer-practice education.