MOS 전류모드 논리회로를 이용한 저 전력 곱셈기 설계

이윤상,김정범,Lee, Yoon-Sang,Kim, Jeong-Beom 한국전기전자학회 2007 전기전자학회논문지 Vol.11 No.2

이 논문은 MOS 전류모드 논리 (MOS current-mode logic circuit, MCML) 회로를 이용하여 저 전력 특성을 갖는 8${\times}$8 비트 병렬 곱셈기를 설계하였다. 이 8${\times}$8 병렬 곱셈기는 제안한 MCML 구조의 전가산기와 기존의 전가산기를 이용하여 설계하였다. 설계한 곱셈기는 기존 곱셈기에 비해 전력소모에서 9.4% 감소하였으며, 전력소모와 지연시간의 곱에서 11.7%의 성능향상이 있었다. 이 회로는 삼성 0.35${\mu}m$ 표준 CMOS 공정을 이용하여 설계하였으며, HSPICE를 통하여 검증하였다. This paper proposes an 8${\times}$8 bit parallel multiplier using MOS current-mode logic (MCML) circuit for low power consumption. The 8${\times}$8 multiplier is designed with proposed MCML full adders and conventional full adders. The designed multiplier is achieved to reduce the power consumption by 9.4% and the power-delay-product by 11.7% compared with the conventional circuit. This circuit is designed with Samsung 0.35${\mu}m$ standard CMOS process. The validity and effectiveness are verified through the HSPICE simulation.

전방머리자세를 가진 초등학생에게 복합운동프로그램이 자세변화와 보행, 균형능력에 미치는 영향: 사례연구

이윤상,안승원,정상모,박현식,주태성,Lee, Yoon-sang,Ahn, Seung-won,Jung, Sang-mo,Park, Hyun-sik,Ju, Tae-seong 대한정형도수물리치료학회 2017 대한정형도수물리치료학회지 Vol.23 No.1

Background: The purpose of this case study was to investigate into the effect of complex exercise program on the postural change, gait and balance ability in elementary school students with forward head posture. Methods: Four patients with forward head posture were recruited. They were evaluated pre-treatment, and after 6weeks, using neck disability index (NDI), numeric pain rating scale (NPRS), balance ability, foot pressure (fore foot/rear foot peak pressure ratio, F/R ratio), gait ability (cadence, toe out angle, stance phase). Results: First, the angle of forward head posture (craniovertebral angle; CVA and cranialrotation angle; CRA) was decreased in all subjects. The NPRS and NDI were decreased in all subjects. Also, The cadence, toe out angle and F/R ratio were increased in all subjects. The stance phase of gait cycle was positively change in all subjects. Lastly, the static balance ability improved in all subjects. Conclusion: According to the results above, the complex exercise program for students with forward head posture can help improve the postural change, gait and balance ability. Also, the complex exercise program was able to select interventions depending on the patient's condition and the desired goal.

수종충전재의 변연누출에 관한 실험적 연구

이윤상,김홍석,박가명,Lee, Yoon-Sang,Kim, Hong-Suk,Park, Ka-Myung 대한치과의사협회 1973 대한치과의사협회지 Vol.11 No.5

The authers have studied the marginal leakage on various filing materials : Composite resin, Polycarboxylate cement, Zinc phosphate cement, Silicate cement and Zinc-oxide eugenol cement, by means of penetration of 2% aquous methylene blue between cavity walls and filing materials at body temperature and at thermal changs in the range of 4~60℃ The results revealed as follows. 1) All the filling materials revealed the penetration of dye between cavity walls and filling materials. 2) Zinc-oxide eugenol cement was the most effective to prevent the dye penetration on the contrary silicate cement cases showed greatest leakage at 37℃ and at temperature changes in range of 4-60℃. 3) The composite resin showed moderate leakage either at 37℃ or at thermal changes 4) Marginal obstructions of polycarboxylate cement were unsatisfactory at 37℃ and at temperature changes.

토사재해 저감 도시설계 사례검토 및 국내 적용방안 연구

이윤상,김효진,진규남,Lee, Yoon-Sang,Kim, Hyo-Jin,Jin, Kyu-Nam 한국토지주택공사 토지주택연구원 2017 LHI journal of land, housing, and urban affairs Vol.8 No.3

Recently, as a part of measures against large-scale natural disasters in Korea, disaster prevention matters are strengthened in urban planning. With the introduction of the disaster vulnerability analysis system, plans for disaster prevention are being reinforced in urban planning. However, there are many problems to be solved at the stage of operation and practical application of the law. When disasters occur, we are focusing on response and recovery plans. Therefore, it is not enough to construct a comprehensive disaster prevention system to prevent disasters in advance. The established disaster prevention plan is difficult to plan management centered on disaster prevention due to factors such as economic efficiency, convenience, and comfort. This study is a basic study for supporting disaster prevention mitigation plan. For this purpose, the analysis of the actual situation of disaster prevention plan at home and abroad and improvement plan were derived. ased on these improvement plans, we have developed a method to apply the element technology of urban design to the test bed to reduce sediment disaster. The test bed was investigated and examined in the disaster hazard area of Busan and Seongnam city. And the defense technology is applied to the selected site, and the basis of the disaster prevention plan and design is proposed. If the proven techniques are reflected from the urban planning stage, it will be possible to contribute to the mitigation of sediment disaster caused by the city.

Spiropyran과 Spirooxazine 유도체의 열변색 현상

이윤상,김종규,허영덕,김명건,Yoon Sang Lee,Jong Gyu Kim,Young Duk Huh,Myoung Kun Kim 대한화학회 1994 대한화학회지 Vol.38 No.12

열변색 현상을 나타내는 spiropyran과 spirooxazine 유도체의 흡수 스펙트럼을 관찰하였다. 흡수 스펙트럼의 용매효과를 관찰한 결과, 치환되지 않은 spiro 화합물은 merocyanine-like form이 quinoid type이며, 전자끄는기가 치환된 spiro 화합물은 merocyanine-like form이 zwitter-ion type임을 확인하였다. 닫힌형 구조와 merocyanine-like form 사이의 엔탈피 변화량을 측정하였다. Spiro 화합물의 엔탈피 변화량은 용매의 극성이 증가할수록 감소함을 관찰하였다. Merocyanine-like form의 흡수 스펙트럼을 세 개의 Lorentzian-Gaussian 곱함수의 띠로 분해하였으며, 각 띠의 모양이 용매에 어떻게 변화하는지도 관찰하였다. Absorption spectra of thermochromic spiropyran and spirooxazine derivatives were investigated. The effects of solvent polarity on the absorption spectra indicate that the merocyanine-like form of non-substituted spiro compound is likely to the quinoid type. However, the merocyanine-like form of electron-withdrawing substituted spiro compound is likely to the zwitter-ion type. The enthalpy changes between the closed and merocyanine-like forms were measured. The enthalpy change of spiro compound decreases as the solvent polarity increases. The UV-Vis spectrum of merocyanine-like form was resolved into three Lorentzian-Gaussian product bands. The solvent dependence of the amount of the three band was also examined.

과립형 각막변성

이윤상(Yoon Sang Lee),김형전(Hyung Jeon Kim) 대한안과학회 1982 대한안과학회지 Vol.23 No.3

슬립 트랜지스터를 이용한 저 전력 MOS 전류모드 논리회로 구조

이윤상(Yoon-Sang Lee),김정범(Jeong-Beom Kim) 한국정보과학회 강원지부 2007 한국정보과학회 강원지부 학술대회 논문집 Vol.1 No.1

이 논문은 MOS 전류모드 논리회로 (MOS current-mode logic circuit)의 누설전류를 감소시키기 위해 슬립 트랜지스터(sleep-transistor)) 트랜지스터를 이용하여 저 전력 MOS 전류모드 논리회로를 구현하는 새로운 구조를 제안하였다. 슬립 트랜지스터는 누설전류를 최소화하기 위해 고 문턱전압 PMOS 트랜지스터(high-threshold voltage PMOS transistor)를 사용하였다. 제안한 구조의 타당성을 입증하기 위해 전가산기를 본 논문에서 제안한 구조로 설계하였다. 이 회로는 기존 MOS 전류모드 논리회로 구조에 비해 전력소모에서 46.87% 감소하였다. 이 회로는 삼성 0.35㎛ 표준 CMOS 공정을 이용하여 설계하였으며, HSPICE를 이용하여 검증하였다.

식용피의 영양성분과 생리활성

이윤상 ( Yun Sang Lee ),윤향식 ( Hyang Sik Yoon ),이상영 ( Sang Yeong Lee ),이정관 ( Joung Kwan Lee ),박철수 ( Chul Soo Park ),서우덕 ( Woo Duck Seo ),김소영 ( So Young Kim ),우선희 ( Sun Hee Woo ),송인규 ( In Gyu Song ) 한국식품영양학회 2012 韓國食品營養學會誌 Vol.25 No.3

數種 齒髓藥劑가 齒髓 Alkaline phosphatase의 活性에 미치는 影響에 關한 硏究

李允相(Yoon Sang Lee),金洙哲(Soo Chul Kim) 대한치과의사협회 1974 대한치과의사협회지 Vol.12 No.7

대한제국의 생존전략과 '을사조약'

李潤相(Lee Yoon-Sang) 역사학회 2005 역사학보 Vol.0 No.188

It has been a hundred years since the Eulsa Treaty. We should have finished investigating the historical significance as well as the historical entity of the treaty by now. However, many discussions up to now have been so wayward that we couldn't get to the point. Especially, Japanese claim to dominion over Dokdo, beautification of colonial period, and falsification of history text have made the future of East Asia clouded, arousing the fierce protest from Korea and China. The invasion upon neighboring countries cannot be justified by any cause. It is definitely a crime in history. Especially, Eulsa Treaty was made by force, was not named then, and was not processed for approval. It means that in terms of law the treaty was void. Nevertheless. Japan colonized Korea based on Eulsa Treaty. Since the responsibility of a crime should be on an assaulter, it is natural for Japan to apologize for their crime and make appropriate reparation. It is the only way to liquidate the past to open a way to a new future of East Asia. Even though the main reason for Daehan Empire (大韓帝國) to lose its sovereignty was the Japanese invasion, overemphasis on the invasion would make the history of Daehan Empire the history of Japanese invasion, not modem history of Korea. It would block the subjective and right understanding of history. Thus, this paper will focus on shedding light on the desperate situations of Daehan Empire and examining the domestic reasons of why the Empire failed in defending herself against the Japanese invasion. Daehan Empire was founded on the balance of imperial great powers, the increasing nationalism, and the will to regain power of the emperor Gojong (高宗). However, the balance of the great powers was unstable, and the political and economic basis of Daehan Empire was too weak. Under this situation, the only way for small and weak Daehan Empire to survive was to build up a strong and stable political entity, consolidate the nation, and drive a powerful modem innovation in order to defend herself against the invasion of the great powers, domestically. Internationally, Daehan Empire could not help exerting its efforts to maintain the power balance among the great powers and try to put herself in the neutral position. However, the emperor Gojong and his surroundings tried to strengthen his power and maintain dynasty, which was a main factor to limit the survival strategy of Daehan Empire. Due to various actions for the emperor's power strengthening, the emperor Gojong's status reached its peak in 1902. However, the policy of power balance which could not help accepting the interference of the great powers was a weakening factor to Gojong's power. Moreover, Gojong's way of governing was not based on the strong supporting powers, and thus he should rely on the mutual check between the political parties, making the emperor's status relatively higher. Various innovative projects of Daehan Empire for a wealthy, powerful, and modem nation got ruined by the interference of the great powers, lack of capitals, weak leading powers, and Japanese invasion. An expansion of finance for the Imperial Household and the increase of military expenses along with the lack of revenues made the innovative projects impossible. These political and economic circumstances drove the emperor Gojong anxious for the balance of the great powers and for the Empire's obtaining a neutral power, However, a series of events such as Anglo-Japanese Alliance, Russo-Japanese War, and Eulsa Treaty revealed that the emperor Gojong's hope and effort was rejected and ignored by Japan's greed and the great power's deal. Conclusively, the survival strategy of the emperor Gojong and Daehan Empire was not to consolidate the nation based on the innovative projects, but to maintain the sovereignty of the emperor and the nation by taking advantage of the power balance among the great powers. As a small and weak power, it was the only possible choice the