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金範錫,金星坤,韓必熙,朴樹榮,李宜宣,崔祐榮 明知大學校 産業技術硏究所 2009 産業技術硏究所論文集 Vol.28 No.-
In general, LED display system displays the fixed text in ROM. In this paper, we propose the wireless real-time LED display system in which the text can be easily displayed in any text color and display mode by users And the system can be set up in any place by using Zigbee communication.
Comparison of Distance Measurement in Time Series Clustering for Predicting Bitcoin Prices
Ui-Jun Back,Mu-Gon Shin,Min-Seong Lee,Boseon Kim,Jee-Tae Park,Myung-Sup Kim 한국통신학회 2020 한국통신학회 APNOMS Vol.2020 No.09
Since the development of Bitcoin, the first blockchain-based cryptocurrency, many cryptocurrencies have formed and have traded in markets. The integrity and anonymity of cryptocurrency was enough to raise its value and its price gained worldwide attention. Therefore, many studies are being carried out to predict the price of cryptocurrency for make a profit. We cluster time series through K-Medoids algorithm and train and evaluate each cluster with predictive models. We also examine the predictive performance in Bitcoin price according to the various distance measurement of clustering.
리눅스 클러스터 파일 시스템을 위한 통신모듈의 설계 및 구현
박의수(Ui-Su Park),유찬곤(Chan-Gon Yoo),손호신(Ho-Shin Son),최현호(Hyun-Ho Choi),김형식(Hyong-Shik Kim),유관종(Kwan-Jong Yoo) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1A
클러스터 파일 시스템은 기존의 클러스터링 기술을 파일 시스템에 적용하여, 각 노드 단위로 파일 시스템을 구성할 때 발생되는 저장 공간과 대역폭의 제약문제를 극복하기 위한 방법이다. 클러스터 파일 시스템은 하나의 원본 파일을 여러 노드에 나누어 저장하므로, 효율적인 노드간 데이터 통신을 필요로 하며, 노드 내부에서도 클러스터 파일 시스템과 어플리케이션과의 전용 데이터 교환 메커니즘을 지원해야 한다. 본 논문에서는 클러스터 파일 시스템이 안정적이고 효율적인 방법으로 멀티미디어 데이터를 분산 저장하기 위하여 필요한 통신 모듈을 설계 및 구현한다.
[가솔린엔진] 자동차 Vortex 유량계의 유동현상에 대한 연구
민영위(Yeong-Ui Min),김유곤(Yon-Gon Kim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The two-dimensional unsteady incompressible viscous flow behind rectangular bluff bodies between two parallel plates was analyzed numerically. The steady state flow and the vortex flow behind rectangular bluff bodies in a channel were investigated for Reynolds numbers of 100. 300 and 500. The vortex shedding was generated by a physical pertubation numerically imposed at the around of the bluff bodies for a short time. It was observed that the perturbed flow became periodic after a transient period. The Finite Volume Method(FVM) is employed to discretize the governing equation based on the orthogonal coordinate with staggered variable arrangement. The power-law scheme is used to get stable linearized equations and SIMPLER algorithm is applied to finding the solution of them.
민영위(Yeong-Ui Min),김연수(Yeon-Soo Kim),김유곤(You-Gon Kim) 한국전산유체공학회 2001 한국전산유체공학회지 Vol.6 No.2
The two-dimensional unsteady incompressible viscous flow behind rectangular bluff bodies between two parallel plates was analyzed numerically. The steady state flow and the vortex flow behind rectangular bluff bodies in the channel were investigated for two regimes i.e., the laminar(Re = 100, 300, 500) and the turbulent flows(Re = 10⁴~10^6). The vortex shedding was generated by a physical disturbance(6%) numerically imposed at the rear of the bluff bodies for a short time. It was observed that the perturbed flow became periodic after a transient period. And in the case of unsteady inflow, the sinusoidal pulsatile flow was applied as the inlet condition in the turbulent flow of Reynolds number of 1.0 × 10^5. FLUENT code was employed to solve the problems. The power-law scheme was used to get stable linearized equations and the PISO algorithm was applied to finding the solution of them.