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류제천,박춘수,정석영 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2
In domestic research, standard penetration test and cone test have been used largely for the investigation of soft ground. But standard penetration test has been developed to apply to sand and its result is under the influence of experimenter's skill. The cone used so far has also experimental limitation in the point that penetration into stiff ground is difficult. Recently Piezocone is used world-wide for the investigation of soft ground. Piezocone makes it possible to get more acculate information upon ground because to add to the function of existing cone, it has that of measuring pore water pressure. In this thesis the result of this research is compared with that of laboratory test in the same area. In the result of study the coefficient of consolidation in the horizontal direction of investigation area is ?? and the mean of the cone factor is 15. There is little difference in the soil classification between by Piezocone test and by existing tests. If Piezocone is continuously studied, revised and amended to be suitable for domestic condition, more correct and pre cise research on soft ground will be possible.
이정덕,박춘수,류제천 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.1
In recent years, three-dimensional development of the earth has been gradually needed with the progress of industry. It makes the necessity of huge structures such as skyscrapers increased in urban areas and large scale underground excavation for them follows. But it requires new technology and analytic method due to circumstantial limitations and geological properties, and the informational construction by in-situ measurement plays an important role as a solution. In this study, we compares and analyses the displacement and the pressure distribution of earth with the in-situ measurement and the numerical analysis about two model cases.
멀티미디어 SoC용 시스템 버스의 소비 전력 모델링 및 해석
류제천(Che-Cheon Ryu),이제훈(Je-Hoon Lee),조경록(Kyoung-Rok Cho) 한국콘텐츠학회 2007 한국콘텐츠학회논문지 Vol.7 No.11
본 논문은 시스템 버스와 IP로 구성되는 SoC 플랫폼 기반의 설계에서 온칩 버스의 소비 전력을 시스템 레벨에서 빠르고 정확하게 추정하는 방법을 제시한다. 제안된 소비 전력 추정 모델링은 시스템 구조 변화에 따른 버스 시스템의 소비 전력 변화를 직접 예측할 수 있고 이에 따라 시스템 구성을 최적화할 수 있다. 본 논문에서 소비전력 모델링은 크게 두 부분으로 구성된다. 하나는 버스 시스템 구조에 따른 버스 로직들이 사용하는 소비 전력이고, 다른 하나는 데이터 전송시 발생하는 신호 천이에 의한 버스 라인의 소비전력이다. 본 모델링을 타겟 멀티미디어 SoC인 MPEG 인코더에 적용하여 92% 이상의 정확도를 가짐을 보였다. 제안된 모델링은 고성능/저전력 멀티미디어 SoC 설계에 활용 가능할 것으로 기대된다. This paper presents a methodology that accelerates estimating the system-level power consumption for on-chip bus of SoC platforms. The proposed power modeling can estimate the power consumption according to the change of a target SoC system. The proposed model comprises two parts: the one is power estimation of bus logics reflecting the architecture of the bus such as the number of bus layers, the other is to estimate the power consumed by the bus lines during data transmission. We designed the target multimedia SoC system, MPEG encoder as an example and evaluated power consumption using this model. The simulation result shows that the accuracy of the proposed model is over 92%. Thus, the proposed power model can be used to design of a high-performance/low-power multimedia SoC.
이운영,박춘수,류제천 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.1
We need many industrial site cause that progress of industrial development. But befitting to industrial site is limited. The propose of this study is to decide that we can use the dynamic consolidation method for ground improvement on the site of raising the ground level. This study include the pilot test and the inspection of evidence for the ground improvement effect. The pilot test by dynamic consolidation method attempt at eleven spot. Determine the bearing capacity and settlement of ground for inspection that ground improvement effect. And confirm the result of pressuremeter test value more than require bearing capacity. The method of evidene by inspection used two way. The result of pressuremeter test value is comparision with the result of standard penetration test and plate bearing test each attemptable twice. The result of this study is as follow A. For the Structure 1. Required contact pressure: 15∼35ton/㎡ 2. Allowable settlement: 5cm B. Investigation of pilot test 1. Contact ground pressure: 35.2ton/㎡ 2. Settlement: 2.3cm C. Investigation of standard penetration test 1. Contact ground pressure: 27.8ton/㎡ 2. Settlement:2.8cm D. Investigation of plate bearing test 1. Contact ground pressure: 27.7ton/㎡ 2. Settlement: 0.6∼2.5cm So, over the result is come to the conclusion that pilot test is successfully improves reclaiming ground.
정석영,박춘수,류제천 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2
Recently, many deep excavation have been practiced in constructing building or subways in urban areas to utilize more effectively underground space. In doing such underground excavations, information-oriented construction through the field measuring is getting more important not to give damages the next buildings and to practice in safety. The earth pressure, horizontal displacement, underground water table and so on are included in the item to make sure of safety through the field measuring. The empirical earth pressure come from the strut retention. But in recent days the two reasons have made the construction having been used through anchored retention why the width of earth retaining is so wide and here is a purpose to make use wider and wider the space of work. I come to make conclusions as follow to observe the safety of earth retaining structures with horizontal displacement and underground water table and to study lateral earth pressure of anchored retention earth retaining walls with load cells on the anchored retention sites.
김송만,류제천,박춘수 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1
As basements are built to greater depths and building developments occupy greater plan areas, the problems of settlement and horizontal displacement occur. To ensure minimum soil movement horizontally and vertically, around and below a deep excavation of given soil conditions, several measured are meccessary. Sometimes adjacent structures is damaged horizontal displacement and vertical settlement around and below of site. Recently, the intrumentation has many important roles in estimating and keeping stability of underground structures. Therefore, I present the characteristic of horizontal displacement through comparing instrumentation data with sunex program results for retention walls in a TaeJon site. As I think collectively many instrumentation data adn each field conditions, I point main factors causing horizontal displacement. Using instrumentation data, I propose a relationship representing a depth and magnitude with maximum horizontal displacement happens