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경옥고가미방(瓊玉膏加味方)이 흰쥐의 성장(成長)에 미치는 영향(影響)
정봉균,윤혜진,이유진,강미선,백정한,Jung, Bong-Kyun,Yun, Hye-Jin,Lee, Yu-Jin,Kang, Mi-Sun,Baek, Jung-Han 대한한방소아과학회 2009 대한한방소아과학회지 Vol.23 No.1
Objectives The purpose of this study is to find out the effect of KyungOcGogamibang(KOGE) on the growth of rats. Methods First of all, we divided male Sprague-Dawley rats into 4 groups(KOGE1, KOGE2, KOGE3 and control group). Then KOGE1, KOGE2 and KOGE3 groups were administered with KOGE water extracts once a day at a dosage of 250, 500, 1,000mg/kg respectively for 3 weeks. The control group was administered with normal saline in the same manner. We measured the rat's body weight, amount of body weight increased, length of femur, serum GH, serum IGF-Ⅰ, serum TSH and serum testosterone after each week of administration. Results 1. There were significant changes of the rat's body weight, the length of the femur, the level of GH, IGF-Ⅰand TSH in KOGE1 groups. 2. There were significant changes of the rat's body weight, the length of the femur, the level of IGF-Ⅰand TSH in KOGE2 groups. 3. There were significant changes of the rat's body weight, the length of the femur, the level of IGF-Ⅰand TSH in KOGE3 groups. Conclusions According to the results above, rat in KOGE group have been increased their body weight, length of femur, serum GH, serum IGF-1 compared to the control group. This study shows that groups of KOGE have an effect on promoting the growth, thus it is expected to treat growth problems for children.
대도시 공동주택의 주차문제와 개선방안 : 서울시의 사례
정봉현 전남대학교 지역개발연구소 1996 지역개발연구 Vol.28 No.1
This study explores the development of parking tactics for improving parking problems in apartment estates of the Seoul Metropolitan City(SMC). This study is aimed to review a basic theory of apartment parking, to analyze the parking facilities and behaviour, and to present the parking tactics for improving the parking problems in Seoul's apartment estates. This study was conducted by the analysis of secondary data and a content analysis of the research reports and papers. Parking is an essential and integral part of urban transportation as well as a major urban land use. The parking problem in SMC resulted from rapid increase in car ownership, inadequate parking facilities, and lacking road networks. Today, the parking problem in Seoul has become an integral part of the transport problems as well as a social issue for Seoul Metropolitan Government to solve urgently. The population of Seoul increased at an annual average growth rate of 1.7% during the 1982∼1993 period. The total number of private car ownership increased rapidly at an annual average rate of 21.3% during the same period. The parking demand will increase continuously in the future. Parking requirements in apartment estates are related to each dwelling units in Seoul ; one space per 75㎡ for apartments below 85 m floor area, one space per 85㎡ for apartments above 85㎡ floor area. In Seoul, the parking demand of general units shows 0.81 spaces per unit and the 88.9% of parking supply. About 51.1% of the inhabitants in apartment estates parked their private cars at the parking area. Around 42.4% of the residents there indicated that the parking conditions were inconvenient. The parking situation in Seoul's apartment estates is deteriorating, with the consequence that parking problems, especially of transportation, attracted considerable popular attention in the 1990s. Especially, the parking problem in apartment estates stems from insufficient parking facilities, and has negative consequences : traffic congestion, traffic accidents, pedestrian safety, and quality of life environment. The significant parking tactics are associated with reserved parking lots for each dwelling unit, designated parking lots for short-term visitors, establishment of parking facility funds, joint use of parking facilities, residential parking permit programs, and regulations on curb parking in institutional and managerial perspectives. Parking tactics in the parking supply side are involved in improvement on parking requirements for apartments, separating parking lots from apartments for sale, improved circulations and parking lot sites, construction of apartment's parking lots, increasing parking layout efficiency, and construction of public parking facilities.
블록 크기 활동도를 이용한H.264/AVC 부호화 고속 모드 결정
정봉수,전병우,최광표,오윤제 대한전자공학회 2007 電子工學會論文誌-SP (Signal processing) Vol.44 No.2
H.264/AVC uses variable block sizes to achieve significant coding gain. It has 7 different coding modes having different motion compensation block sizes in Inter slice, and 2 different intra prediction modes in Intra slice. This fine-tuned new coding feature has achieved far more significant coding gain compared with previous video coding standards. However, extremely high computational complexity is required when rate-distortion optimization (RDO) algorithm is used. This computational complexity is a major problem in implementing real-time H.264/AVC encoder on computationally constrained devices. Therefore, there is a clear need for complexity reduction algorithm of H.264/AVC such as fast mode decision. In this paper, we propose a fast mode decision with early P8x8 mode rejection based on block size activity using large block history map (LBHM). Simulation results show that without any meaningful degradation, the proposed method reduces whole encoding time on average by 53%. Also the hybrid usage of the proposed method and the early SKIP mode decision in H.264/AVC reference model reduces whole encoding time by 63% on average. H.264/AVC의 인터 부호화 기술은, 정교한 움직임 보상 부호화를 위해 다양한 블록 크기의 7가지 모드를, 그리고 인트라 부호화 기술은 2가지의 블록부호화 모드를 사용한다. 이러한 정교한 부호화 기술은 기존 표준에 비해 높은 부호화 효율을 제공하지만, 비트율-왜곡 최적화 기법을 사용할 경우, 많은 계산량을 요구하므로 연산량이 제한된 장치에서는 실시간 구현에 문제점이 발생한다. 따라서 H.264/AVC 부호화 표준의 실시간 구현을 위해서 계산 복잡도를 줄이는 고속 모드 결정법이 필요하다. 본 논문에서 제안한 LBHM(Large Block History Map)을 이용한 블록 크기 활동도 기반 고속 모드 결정 기법은 발생 확률이 낮은 P8x8 모드를 조기에 생략하여, 부호화 효율의 감소는 최소화 시키면서 H.264/AVC의 전체 부호화 시간을 평균 53% 감소 시켰으며, H.264/AVC 참조 모델의 조기 SKIP 모드와 같이 사용할 경우, 전체 부호화 시간을 평균 63% 이상 감소시켰다.