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유기형,이성우,박동기,김윤호,Yu, Gi-Hyeong,Lee, Seong-U,Park, Dong-Gi,Kim, Yun-Ho 한국정보처리학회 1997 정보처리논문지 Vol.4 No.5
This paper presents a systolic array design method which derives 1 or 2 dimensional optimal planar systolic arrays from a given n dimensional problem represented as a regular recurrence equation and its implementation called a systolic array design system(SADS).The SADS parses a regular recurrence equation and gets the information such as problem space, data dependence vectors. and intial data positions. Systolic arrays are automati-cally derived by the space-time transformation form the information to be abeaired in the parsing phase.The SADS allows us to verify the parallel execution of the derived systolic aooay through the graghical interface. 본 논문에서는 정규 순환방정식으로 표현된 n차원의 문제로부터 1차원이나 2 차원의 최적 평면 시스톨릭 어레이를 체계적으로 유도하는 방법과 이를 구현한 시스톨릭 어레이 설계시스텀을 제시한다. 구현된 시스템은 주어진 정규 순환방정식을 구문분석하여 문제공간, 자료종속 벡터와 초기값의 위치를 구한다. 이들 정보로부터 공간.시간 변환을 하여 자동으로 시스톨릭 어레이를 유도한다. 이스시템은 유도된 시스톨릭 어레이를 유도한다. 이 시스템은 유도된 시스톨릭 어레이의 병렬수행이 올바르게 이루어지는 지를 시각적으로 검증할 수 있게 해 준다.
바닥급기 시스템의 거주역 공조를 위한 설계 기법 및 에너지 절감 효과에 관한 연구
유기형,송규동,Yu, Ki-Hyung,Song, Kyoo-Dong 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.3
Underfloor air distribution system is generally known to be more energy-saving and provide more comfort as compared with overhead air distribution system. In practice, however, some buildings to which underfloor air distribution system is applied have less effectiveness in saving energy and are getting dissatisfaction with cold draft caused by wind velocity of air distribution in terms of comfort. It is judged that such problems are due to failure to consider properties of underfloor air distribution system in applying it and identical design with the design standards for the existing overhead air distribution system. This study aims at introducing an air conditioning type of the occupied zone for underfloor all distribution system to see its effectiveness in saving energy for air conditioning of the occupied zone through a comparative simulation with the existing air conditioning type.
유기형(Yu. Ki-Hyung),조동우(Cho. Dong-Woo),유지용(Yu. Ji-Yong),이진영(Lee. Jin-Young),이상엽(Lee. Sang-Youp) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The purpose of this study was to evaluate the indoor environment of office building with underfloor air distribution system and ceiling based air conditioning system. The underfloor air distribution system was introduced to use access floor and aim to economical motive such as reducing floor to height level. Researches were not sufficient to preserve the characteristics between ceiling based air conditioning system and underfloor air distribution system. Experiments have been carried out to indoor environment in the summer and winter. As the result, thermal environment of the underfloor air distribution system is better than ceiling based air conditioning system in the winter. Ventilation effectiveness of the underfloor air distribution system is bigger than ceiling based air conditioning system.
유기형(Ki-Hyung Yu),조동우(Dong-Woo Cho),송규동(Kyoo-Dong Song) 한국생활환경학회 2006 한국생활환경학회지 Vol.13 No.4
The purpose of this study is to present the method of daylighting performance of the housing performance indicator system. Daylighting in the neighboring areas of apartment complex is very important especially under the circumstances of densely populated urban cities. Therefore, we need objective index that can be evaluated daylighting performance. Important items of day lighting performance in apartment complex are daylighting, artificial lighting, view, privacy etc. We are handling about day lighting performance using simplified methodology in this study. The method of day lighting performance of the housing performance indicator system being established as can evaluate easily, is expected to reduce estimation time and costs.
유기형(Ki-Hyung Yu),송규동(Kyoo-Dong Song) 한국생활환경학회 2007 한국생활환경학회지 Vol.14 No.4
The purpose of this study is to analyze the performance of hybrid underfloor air distribution system. The characteristics of the several types of underfloor air distribution system were explicated. The computer simulation and the field and laboratories experiment were conducted. As the results, the pressure of plenum became decreased according to the increase of volume flow of FTU with hybrid underfloor air distribution system, but the pressure difference was not changed. The pressure difference was increased in proportion to the volume flow of AHU. It is necessary to consider the proper strategies when the plenum has the longer supply distance and/or the high pressure of the lower part.
유정연(Yu Jung-Yeon),조동우(Cho Dong-Woo),유기형(Yu Ki-Hyung),정해권(Jung Hae-Kwon),양인호(Yang In-Ho) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.12
The purpose of this study is to evaluate for application of the new type of floor heating system with an improved performance than an existed floor heating system in apartment houses. The warmer and moderate part Ondol system suggested in this study were applied to the experimental apartment house and the mock-up room. The field measurements for this system were executed in winter climates. As a result of field measurement, when the load differences between perimeter zone and central zone are increased, the separately controled Ondol system divided in the warmer and moderate part can be evaluated as the new Ondol system with a capability for suppling proper heating energy for each zone. The user can have the freedom for changing warmer parts and the moderate parts and controlling each temperature according to their needs.