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효율적인 다중 채널 On-Chip-Bus를 위한 SoC Network Architecture
이상헌,이찬호,이혁재,Lee Sanghun,Lee Chanho,Lee Hyuk-Jae 대한전자공학회 2005 電子工學會論文誌-SD (Semiconductor and devices) Vol.42 No.2
공정기술과 EDA 툴의 발전에 따라서 하나의 실리콘 다이(Die)에 많은 IP가 집적되고 멀티프로세서가 포함되는 SoC 구조가 가능해지고 있다 그러나 대부분의 기존 SoC 버스는 공유버스 구조라는 문제점으로 인해 통신의 병목현상이 발생하고 이는 전체 시스템 성능을 저하시키는 요인이 된다. 많은 경우에 멀티프로세서 시스템의 성능은 CPU 자체의 속도보다는 효율적인 통신과 균형있는 연산의 분배가 좌우하게 된다 따라서 충분한 SoC 버스 대역폭(Bandwidth)을 확보하기 위한 하나의 해결책으로 크로스바 라우터(Crossbar Router)를 이용하여 효율적인 온 칩 버스구조인 SoC Network Architecture(SNA)를 제안한다. 제안된 SNA구조는 다중 마스터(multi-master)에 대해 다중 채널(multi-channel)을 제공하여 통신의 병목현상을 크게 줄일 수 있으며 뛰어난 확장성을 지원한다. 제안된 구조에 따라 모델 시스템을 설계하고 시뮬레이션을 진행한 결과 AMBA AHB 버스에 비해 평균 $40\%$ 이상 효율이 증가했다. We can integrate more IP blocks on a silicon die as the development of fabrication technologies and EDA tools. Consequently, we can design complicated SoC architecture including multi-processors. However, most of existing SoC buses have bottleneck in on-chip communication because of shared bus architectures, which result in the performance degradation of systems. In most cases, the performance of a multi-processor system is determined by efficient on-chip communication and the well-balanced distribution of computation rather than the performance of the processors. We propose an efficient SoC Network Architecture(SNA) using crossbar routers which provide a solution to ensure enough communication bandwidth. The SNA can significantly reduce the bottleneck of on-chip communication by providing multi-channels for multi-masters. According to the proposed architecture, we design a model system for the SNA. The proposed architecture has a better efficiency by $40\%$ than the AMBA AHB according to a simulation result.
이상헌,Lee, Sang-Heon 대한건축사협회 2000 建築士 Vol.2000 No.4
본지에서는 지난 2000년 1월호에 '21세기 한국건축의 비전'이란 주제로 기획특집을 마련, 교육관련 부문을 이상헌(건국대 건축대학원)교수에게 집필 의뢰하여 '건축교육개혁방안 ; 학부 5년제 문제 있다'는 내용의 원고를 게재하였고, 이후 이교수의 글과 관련하여 김광현(서울대 건축학과)교수는 학부 5년제의 취지를 이해하지 못한데서 비롯됐다며, 이교수의 글에 대한 반론을 제기하여 '학부 5년제 문제있다는 주장의 문제'의 글을 기고하여 본지 2월호에 게재한 바 있다. 이에 대해 이상헌교수는 '학부 5년제 문제있다는 주장의 문제'에 대해 반론을 제기한 김광현교수의 글은 필자의 글에 대한 의도나 생각을 근본적으로 오해한 데서 비롯된 것으로서 이에 대한 보다 정확한 필자의 생각을 피력하기 위해 '대학원 중심의 4+2년제를 주장하는 이유'에 대한 글을 3월호에 게재코자 기고하였다. 그러나 지면관계상 3월호에 게재하지 못하고, 이번호의 '기고'지면을 통해 게재코자 하며, 아울러 지난 1,2월호 본지를 통해 게재된 건축교육 관련내용에 대한 필자의 글과 본란의 글은 우리 협회의 의견과 일치하지 않을 수도 있음을 밝힌다.
Nonlinear Goal Programming Approach for Robust Parameter Experiments
이상헌,Lee, Sang-Heon Military Operations Research Society of Korea 2002 한국국방경영분석학회지 Vol.28 No.1
Instead of using signal-to-noise ratio, we attempt to optimize both the mean and variance responses using dual response optimization technique. The alternative experimental strategy analyzes a robust parameter design problem to obtain the best settings that give a target condition on the mean while minimizing its variance. The mean and variance are treated as the two responses of interest to be optimized. Unlike to the crossed array and combined array approaches, our experimental setup requires replicated runs for each control factor's treatment under noise sampling. When the postulated response models are true, they enable the coefficients to be estimated and the desired performance measure to be analyzed more efficiently. The procedure and illustrative example are given for the dual response optimization techniques of nonlinear goal programming.
말레이시아 화인거리의 형성과정과 도시주거에 관한 연구 -말레이시아 말라카와 싱가포르를 중심으로-
이상헌,윤인석,Lee, Sang-Hun,Yoon, In-Suk 한국건축역사학회 1998 건축역사연구 Vol.7 No.4
The formation of Chinese Town in Malacca of Malaysia and Singapore would explain that Chinese gradually played an important role of commerce and urban service according to the Western European advance to southeast Asia and the construction of colonial cities from the 16th century to 19th and massed residence in many cites of southeast Asia. Chinese was usually separated from the Western European by western colonial policy and city planning. Common architectural characteristics in Chinese towns of Malaysia can refer to the transmission of the Chinese architectural material, the combination of dwelling and commerce in a house and the space organization centered on a court or an air well in the narrow and long site, lying adjacent to street etc. The Chinese dwellings in Malaysia rooted with Chinese settlement in southeast Asia. The Chinese dwellings was not always a shop on 1th floor and a dwelling on 2nd floor before the 19th century. But as Chinese immigration and commercial activity progressed in earnest in the early of 19th century, the row house of Chinese for dwelling was autonomously changed to two functional shophouse for dwelling and commerce. Chinese row house can refer to the use of Malay regional material, change of symmetrical Chinese traditional housing type by the narrow and long site and the tendency of the eclectic elevation of Western and China. Another architectural characteristics of the shophouse is an appearance of the continuous verandah with a cover regulated by Stamford Raffles in Singapore. This regulation was applied to architecture in Chinese Town as Stamford Raffles constructed Singapore. It was spread to South China reversely and became the regulation of streetscape for the modern city. Shophouse of Chinese towns in Southeast Asia and south China can be understood by context of Chinese immigration, colonialism, housing type of commerce and dwelling and the Western European city planning.
보중익기탕 투여 후 화학항암제로 인한 전신쇠약감 및 탈모호전 증례보고
이상헌,Lee, Sang-hun 대한한방내과학회 2017 大韓韓方內科學會誌 Vol.38 No.2
This case study describes the effect of Bojungikki-tang on chemotherapy-induced alopecia. Alopecia is a well-documented cause of distress to patients undergoing cancer treatment, but no approved pharmacological treatment exists for chemotherapy-induced hair loss. A 70-year-old female diagnosed with a cholangiocarcinoma and liver metastasis received chemotherapy, including gemcitabine and cisplatin, every three weeks. As a result of the continuous chemotherapy, she suffered various toxicity-related side effects, including bone marrow suppression, general weakness, nausea, peripheral numbness, and hair loss. Bojungikki-tang was initially administered to improve the patient's general weakness and fatigue. After three months of treatment, the patient's hair loss and general condition improved, and the color of the new hair was dark, despite the chemotherapy. The treatment did not improve other symptoms, such as bone marrow suppression and peripheral numbness. This case suggests that Bojungikki-tang could have a beneficial effect on chemotherapy-induced alopecia.