SGCMG를 이용한 단축 불안정 시스템의 안정화 제어 기법 개발

이준식,이준용,유지훈,김지철,전동익,오화석,Lee, Junsik,Yi, Junyong,Yoo, Jihoon,Kim, Jichul,Cheon, Dongik,Oh, Hwa-Suk 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.4

Control Moment Gyroscope(CMG) is one of the most efficient momentum exchange devices for satellite attitude control and essential device for agile maneuver system. This paper presents the details of a designed Single Gimbal CMG with a constant speed momentum wheel and single axis attitude control unstable to stable. In order to keep the naturally unstable equivalent point, it should be controlling the gimbal constantly. The experimental data are compared with theoretical result and requirements are used to verify their performance specifications.

산화물 반도체(NiO/ZnO)기반의 투명 광전 소자 및 역바이어스를 통한 광응답 특성 향상

이준식(Lee Junsik),Naveen Kumar,Malkeshkumar Patel,신봉주(Shin Bong-Joo),김준동(Kim Joondong) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.6

A photodetector is a device that converts a light signal into an electrical signal. Most transparent ultraviolet (UV) photodetectors are composed of metal oxide materials having a wide energy bandgap. Here, we manufactured a high-performance transparent photodetector that specifies the UV region using a heterojunction structure of a metal oxide (n-type ZnO/p-type NiO). In particular, ZnO and NiO are less harmful to the human body, have a chemically stable structure, and are low cost due to abundant reserves. Our device can be applied to various fields of photoelectric devices, including solar cells and photodetectors, and human electronics. Owing to the photovoltaic effect of the ZnO/NiO device, the transparent photodetector can be operated in self-powered mode. To verify the optimum operation, bias tuning was applied to investigate the device’s performances of response time and photocurrent. The characteristics of devices and their effects on electrical changes inside the device, including an increase in the depletion region, improvements in carrier collection and carrier velocity, and an increase in the electric field intensity, were analyzed by reverse bias.

특집 : 뒤늦은 국가차원의 친일청산: 친일반민족행위진상규명위원회의 활동을 중심으로

이준식 ( Junsik Lee ) 법과사회이론학회 2015 법과 사회 Vol.0 No.49

한국사회의 과거사 문제는 다양한 모습을 띠고 있지만 크게 보면 일제 식민통치가 남긴 과거사와 독재정권이 남긴 과거사로 나눌 수 있다. 그런데 이러한 두 종류의 과거사가 사실상 동전의 양면과 같다는 데 한국 과거사 문제의 특징이 있다. 실제로 독재정권의 과거사 문제는 해방 직후 이승만 정권에 의해 친일파 청산, 더 나아가서는 일제잔재 청산이 좌초한 데서부터 비롯되었다. 1987년 6월항쟁 이후 독재정권과 친일파가 밀접하게 관련되었다는 사실이 사람들의 눈길을 끌게 되었다. 그러면서 한국사회 민주화의 한 과정으로 친일청산을 해야 한다는 목소리가 높아졌다. 반민특위의 와해로 좌초된 친일청산을 뒤늦게나마 마무리하자는 ‘제2의 친일청산운동’이 벌어진것이다. 시민사회에서 시작된 친일청산 요구는 국민의 여론을 등에 업고 국가로 확대되었다. 그 결과 2004년 3월 〈일제강점하 친일반민족행위진상규명에 관한 특별법〉이 국회를 통과했고 이 범에 따라 2005년 친일반민족행위진상규명위원회가 출범했다. 반민규명위는 법에 정해진 바에 따라 친일청산을 위한 진상규명 활동을 벌였다. 친일청산에 반대하는 정치권과 보수언론의 집요한 방해공작에도 불구하고 1,006명에 대해 친일반민족행위 결정을 내린 것이야말로 반민규명위의 중요한 성과라고 할 것이다. 오랫동안 한국사회에서 금기의 영역에 속해 있던 친일의 문제를 국가차원에서 정리했다는 것 자체가 역사적으로 중요한 의미를 갖는다. 반민규명위의 성과는 인권과 민주주의 시민의 연대의식이 성장했음을 보여준다. 해방된 지 60년도 더 지나 국가차원의 친일청산이 이루어지는 바람에 청산의 핵심이어야 할 사법적 처리는 불가능했지만 그나마 친일반민족행위에 대한 역사적 책임을 묻고 역사의 기록으로 남겼다는 사실 자체가 중요하다. 60년도 더 지난 뒤의 과거사청산이라는 점에서 친일청산은 세계적으로 유례가 없는 것이기도 하다. 다만 다른 과거사청산처럼 국가차원의 친일청산도 국회에서 특별법을 만들고 법에 따라 설치된 진실위원회 형태의 기구에 의해 이루어졌다는 점에서 한계를 갖는다. 특별법 자체가 진상규명의 범위를 애초에 지나치게 좁게 잡아 놓았기 때문에 위원회의 활동도 그로부터 제약을 받았다. 처음부터 조사대상과 범위에 대한 신축적인 판단의 여지가 상당 정도 봉쇄되어 있었던 것이다. 국가차원의 친일청산은 시민사회의 친일청산 움직임에서 촉발되었다. 미완의 친일청산을 마무리하는 것은 다시 시민사회의 몫이 되었다. 반민규명위의 친일반민족행위 결정은 친일청산의 완결이 결코 아니다. 국가차원의 친일청산이 친일청산의 모든것이 될 수는 없다. 반민규명위의 친일반민족행위 결정은 앞으로 시민사회와 학계차원에서 이루어질 친일청산을 위한 토대이자 시금석으로 평가되어야 한다. 일제강점기를 비롯해 과거사의 진상을 규명하는 일은 현재진행형의 역사쓰기이자 앞으로 전개될 민주화 이후 우리 현대사의 첫 장을 여는 작업이기도 하다. 친일 진상규명작업은 민주화 운동의 성과물이기도 하지만 민주화 운동의 또 다른 시작이기도 한것이다. The past history of Korea is various types of problems. They can be divided largely into past of the colonial rule by Japan has left and by the abuses of dictatorial government. Peculiarly, their relationship is in line with each other such as both sides of coin. During a chaotic period of Korea achieved independence, all the makings of vestiges of Japanese imperialism was regarded as necessary for setting up to Syngman Rhee government which was actively supported by them. Obviously, the pro-Japanese liquidation by Syngman Rhee’s regime was sloppy, even that it ran aground. After June Democracy Movement in 1987, it began to catch the people``s eyes that the dictator regime was closely related to pro-Japanese. Sad to say, Korean society had failed to clear way Japanese colonialism by downfall of the Special Committee for Prosecution of Anti-National Offenders due to constant sabotage under Syngman Rhee government. A public pressure was gradually mounting for demand of pro-Japanese liquidation and it had to be done as a process of democracy. Consequentially, it took place sporadically the “history clean-up” or “set the history right” campaigns, which referred a second pro-Japanese liquidation movement, and formed a social consensus to uphold historical justice. Strong demand from the civil society expanded to the country in an instant by acting in accordance with public opinion. At last, the Special Act on the Inspection of Collaborations for Japanese Imperialism passed through the National Assembly on March 2004 and the Presidential Committee for the Inspection of Collaborations for Japanese Imperialism was started at 2005 by it. The committee was clarifying the truth for the pro-Japanese prudently. Despite the relentless disturbance of political and conservative journalism, the committee came up with noticeable fruition what that it made a determination of fingering 1,006 people as pro-Japanese collaborators. There was important meaning itself that national institution clearly did indentify pro-Japanese issues that belonged to taboo areas in Korea. Also, In regard to past history liquidation after the past more than 60 years, Pro-Japanese liquidation would be an unprecedented. Even legal procedure as a core of settlement was not possible because it was delayed over sixty years after liberation, it made them take historical responsibility for their activities and was important to put that on record in Korea history. If there were desired, the activities of the committee was limited because it was installed by Special Act, which was based on political compromise in national assembly, and operated it as other past affairs. To crown it all, the special act itself placed first in excessively narrow hold a range of Truth. There was no room for flexible judgment of the survey and the range has been sequestered a considerable degree from the beginning. No one can deny that Pro-Japanese settlement of the national level was inspired from an earnest desire of civil society. Nevertheless, to finish the uncompleted pro-Japanese liquidation will belong to civil society again. The committee decision was not only enough but also it is not all for the pro-Japanese liquidation. However, it should be evaluated as a touchstone because it is not finished and must do it more than the committee by the civil society and the groves of academe. In conclusion, investigating the truth of the past history including Japan colonial era, it is ongoing history writing and also can be a first chapter of our modern history since democratization movements. The truth commission activity for Pro-Japanese is the product of the democracy movement. In other word, it was also in another of the beginning of the democratic movement.

열화상법을 이용한 마이크로 스케일 투과냉각 냉각유효도 측정

이준식(Junsik Lee),임형수(Hyungsoo Lim),방제성(Je Sung Bang),서정민(Jeoung-Min Seo),김진섭(Jinsub Kim),손정락(Jeong Lak Sohn),이정호(Jungho Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12

무라야마 도모요시의 진보적 연극운동과 조선문화 사랑

이준식(Junsik Lee) 역사비평사 2009 역사비평 Vol.- No.88

Tomoyoshi Murayama(1901~1977) was a cultural artist, who had made great steps in diverse fields such as play, literature, film, and art. He was so famous enough to be called "Da Vinci in Japan". Having affection to Korea and Korean, he was a progressive highly educated artist who had done everything he could do to keep traditional Korean culture with his own way. He had been so closely related to Korea that he visited Korea three times in 1938 and he stayed for almost a whole year in Seoul in 1945. Furthermore in 1938 he brought the traditional Korean classical play 〈Chunhyangjeon〉 into the stage. The most important factor in Tomoyoshi Murayama's progressive play movement was a people. He directly went into Korean people and understood Korean culture and did his best to preserve the vanishing Korean culture under Japanese control. Through the literature works containing fondness of Korea, by communications and transactions with Koreans, first and foremost with the performance of plays, he had looked for real solidarity between Korean culture and Japanese culture. Therefore he was not only a precious artist at that time but also he is precious today.

한국 역사 교과서인가, 아니면 일본 역사 교과서인가?

이준식(Lee Junsik) 역사비평사 2013 역사비평 Vol.- No.105

This paper presents a critical overview of a controversial perspective of Korean history―Japanese colonial rule in Korea (1910~1945), that is described in a history textbook produced by the Kyohaksa Publishing Company in Korea. The co-authors of the book can be described as belonging to the “New Right”. The problem of the book is that it contains a considerable number of errors and mistakenly informed facts, many of which occur in Chapter 5 that deals with the Japanese colonial period in Korea. The perspective of Korean history presented in the Kyohaksa history book runs contrary to the commonly accepted viewpoint about that period; it appears to overturn the idea of the forceful occupation of Korea by Japan and the Korean people’s resistance against this intervention. The idea is advanced that Japanese occupation resulted in the modernization of Korea, a claim the authors support with statistics and visual material. However, there is hardly any information on how much Japanese colonial rule deprived the Korean people of nearly everything they had leading to a national collapse. To justify their historical description, the authors identify the pre-colonial period in Korea as one of an inferior pre-monetary economy which recalls the “theory of the stagnation of history” idea that was devised one hundred years ago by Japanese academia to prove how inferior Korean history was to theirs and to justify their colonisation of Korea. The most disturbing aspect of the Kyohaksa history book is that the co-authors have attempted to overturn the commonly accepted historical description of Japanese colonial rule in relation to pro- and anti-Japanese confrontation. They do not conceal their desire to justify Japanese occupation of Korea; there is no difficulty in finding unnecessary long arguments in favor of so-called pro-Japanese Koreans. There is scant reference to the adverse aspects perpetrated on the majority of Korean people by pro-Japanese Koreans, but there is no shortage of excuses for actions that pro-Japanese Koreans were forced to do as part of a cooperative responsibility for the national crisis. The Korean Constitution of the Republic of Korea that succeeded the Provisional Korean Government (PKV) in China (1919~1945), relates to all Koreans who fought for the independence of Korea regardless of their ideological stance. The PKG declaration against all pro-Japanese groups and the removal of any pro-Japanese legacy from the new Korean republic became the independent spirit of Korea. Therefore, any attempt to justify Japanese colonial rule in Korea can be regarded as opposition to the Constitution of Korea. The pro-Japanese stance adopted in the Kyohaska Korean history book should be condemned accordingly.

비트코인 가격 변화에 관한 실증분석

이준식(Junsik Lee),김건우(Keon-Woo Kim),박도형(Do-Hyung Park) 한국지능정보시스템학회 2018 지능정보연구 Vol.24 No.2

본 연구는 비트코인 가격 변화량에 영향을 미치는 요인에 대한 실증 분석을 수행하였다. 기존 연구들은 암호화폐와 관련해 블록체인 시스템의 보안성, 암호화폐가 불러일으키는 경제적 파급효과 및 법적 시사점, 소비자수용 및 사용 의도와 사회현상을 중심으로 이루어졌다. 그러나 암호화폐 가격 변화가 급등과 급락을 반복하면서 많은 사회적 문제를 야기했음에도 불구하고 암호화폐의 가격 변화에 영향을 미치는 요인에 대한 실증적 연구는 부족하다. 때문에 본 연구에서 암호화폐 가격 변화에 미치는 영향 요인을 도출하기 위해 암호화폐 중 가장 대표적인 비트코인을 중심으로 분석을 진행하였다. 분석을 위해 소비자, 산업, 거시경제 세 가지 차원에서 가설을 수립, 각 차원의 변수에 대한 시계열 데이터를 수집하였다. 단위근 검정을 통해 시계열 데이터에 대한 가성회귀를 제거하고 안정성을 검증한 후, 비트코인 가격 변화량에 영향을 미칠 수 있는 요인들에 대한 회귀 분석을 실시하였다. 분석 결과 비트코인 가격 변화량은 비트코인 거래 금지에 대한 검색 트래픽, 미국 달러지수 변화량과는 음의 상관관계를, GPU 벤더의 주가 변화량, 원유 가격 변화량과는 양의 상관관계를 갖는 것을 확인했다. 그 이유로는 비트코인 거래 금지는 비트코인 존폐와 관련해 투자심리에 부정적 영향을 미친 것으로 판단되며, GPU 벤더 주가는 비트코인 생산 단가 증가와 관련해 비트코인 가격에 영향을 미친 것으로 해석된다. 미국 달러지수와는 반대로 움직임으로서 비트코인이 금의 성격을 갖고 있음을 확인하였으며, 원유 가격과의 관계를 통해 원자재와 같은 투자 자산의 역할도 갖고 있음을 확인하였다. 본 연구의 결과를 통해 비트코인이 가진 성격을 규명하였으며, 비트코인 가격 변화 요인에 대한 실증 검증을 통해, 그 동안 부족했던 비트코인 가격 변화 요인을 규명하였고, 해당 요인들을 통해 실무적으로 소비자나 금융기관, 정부 기관에 대해 비트코인에 대한 전략적인 접근방법에 대한 가이드를 제공할 수 있다는 점에서 의의가 있다. In this study, we conducted an empirical analysis of the factors that affect the change of Bitcoin Closing Price. Previous studies have focused on the security of the block chain system, the economic ripple effects caused by the cryptocurrency, legal implications and the acceptance to consumer about cryptocurrency. In various area, cryptocurrency was studied and many researcher and people including government, regardless of country, try to utilize cryptocurrency and applicate to its technology. Despite of rapid and dramatic change of cryptocurrencies’ price and growth of its effects, empirical study of the factors affecting the price change of cryptocurrency was lack. There were only a few limited studies, business reports and short working paper. Therefore, it is necessary to determine what factors effect on the change of closing Bitcoin price. For analysis, hypotheses were constructed from three dimensions of consumer, industry, and macroeconomics for analysis, and time series data were collected for variables of each dimension. Consumer variables consist of search traffic of Bitcoin, search traffic of bitcoin ban, search traffic of ransomware and search traffic of war. Industry variables were composed GPU vendors’ stock price and memory vendors’ stock price. Macro-economy variables were contemplated such as U.S. dollar index futures, FOMC policy interest rates, WTI crude oil price. Using above variables, we did times series regression analysis to find relationship between those variables and change of Bitcoin Closing Price. Before the regression analysis to confirm the relationship between change of Bitcoin Closing Price and the other variables, we performed the Unit-root test to verifying the stationary of time series data to avoid spurious regression. Then, using a stationary data, we did the regression analysis. As a result of the analysis, we found that the change of Bitcoin Closing Price has negative effects with search traffic of ‘Bitcoin Ban’ and US dollar index futures, while change of GPU vendors’ stock price and change of WTI crude oil price showed positive effects. In case of ‘Bitcoin Ban’, it is directly determining the maintenance or abolition of Bitcoin trade, that’s why consumer reacted sensitively and effected on change of Bitcoin Closing Price. GPU is raw material of Bitcoin mining. Generally, increasing of companies’ stock price means the growth of the sales of those companies’ products and services. GPU’s demands increases are indirectly reflected to the GPU vendors’ stock price. Making an interpretation, a rise in prices of GPU has put a crimp on the mining of Bitcoin. Consequently, GPU vendors’ stock price effects on change of Bitcoin Closing Price. And we confirmed U.S. dollar index futures moved in the opposite direction with change of Bitcoin Closing Price. It moved like Gold. Gold was considered as a safe asset to consumers and it means consumer think that Bitcoin is a safe asset. On the other hand, WTI oil price went Bitcoin Closing Price’s way. It implies that Bitcoin are regarded to investment asset like raw materials market’s product. The variables that were not significant in the analysis were search traffic of bitcoin, search traffic of ransomware, search traffic of war, memory vendor’s stock price, FOMC policy interest rates. In search traffic of bitcoin, we judged that interest in Bitcoin did not lead to purchase of Bitcoin. It means search traffic of Bitcoin didn’t reflect all of Bitcoin’s demand. So, it implies there are some factors that regulate and mediate the Bitcoin purchase. In search traffic of ransomware, it is hard to say concern of ransomware determined the whole Bitcoin demand. Because only a few people damaged by ransomware and the percentage of hackers requiring Bitcoins was low. Also, its information security problem is events not continuous issues. Search traffic of war was not significant. Like stock market, generally it has negative in relation to war, but exceptional case

Are you a Machine or Human?: 소셜 로봇의 인간 유사성과 소비자 해석수준이 의인화에 미치는 영향

이준식(Junsik Lee),박도형(Do-Hyung Park) 한국지능정보시스템학회 2021 지능정보연구 Vol.27 No.1

최근 인간과 사회적으로 상호작용할 수 있는 소셜 로봇(Social Robot)에 대한 관심이 커지고 있다. ICT 기술 발전에 힘입어 소셜 로봇이 개인에게 맞춤형 서비스와 정서적 교감을 제공하기 쉬워졌으며, 현대의 사회문제들과 이로 인한 개인의 삶의 질 저하를 해소하기 위한 수단으로 소셜 로봇의 역할이 주목받고 있다. 소셜 로봇에 대한 관심에 힘입어 소셜 로봇보급 또한 크게 늘고 있다. 많은 기업이 다양한 목표시장을 겨냥하기 위한 로봇 제품들을 시장에 선보이고 있으나, 현재까지 시장을 선도하는 명확한 흐름은 부재하다. 이에 따라 소셜 로봇의 디자인을 통해 로봇을 차별화하고자 하는 시도가 늘고 있다. 특히 의인화는 소셜 로봇 디자인에서 중요하게 연구되고 있으며, 소셜 로봇을 의인화하여 긍정적인 효과를 발현하려는 접근이 많이 시도되었다. 그러나 소셜 로봇에 대한 의인화가 형성되는 메커니즘을 체계적으로 설명하는 연구는 부족하다. 의인화에 대한 모호한 이해는 소셜 로봇의 의인화를 형성하기 위한 디자인 최적점의 도출을 어렵게 하고 있다. 본 연구는 소셜 로봇의 의인화가 형성되는 메커니즘을 검증하는 것을 목적으로 한다. 본 연구는 3×2 Mixed Design의 실험 연구를 통해 소셜 로봇의 인간 유사성(Human-likeness)과 개인의 해석수준(Construal Level)이 의인화 형성에 미치는 영향을 확인하였다. 의인화가 형성되는 메커니즘에 대한 6개의 연구 가설을 제시하고, 206명 표본의 데이터를 분석하여 가설을 검증하였다. 분석 결과 소셜 로봇의 인간 유사성 수준에 따라 로봇 의인화 수준이 높아지며, 소비자 해석수준에 따라 인간 유사성이 의인화에 미치는 영향이 다르게 나타남을 확인하였다. 본 연구는 소셜 로봇의 디자인 속성인 인간 유사성과 개인의 사고방식인 해석수준을 함께 고려하여 의인화가 형성되는 메커니즘을 설명하였다는 점에서 시사점이 있다. 본 연구의 결과를 소셜 로봇 의인화 형성을 위한 디자인 최적화의 기준으로 활용할 수 있을 것으로 기대한다. Recently, interest in social robots that can socially interact with humans is increasing. Thanks to the development of ICT technology, social robots have become easier to provide personalized services and emotional connection to individuals, and the role of social robots is drawing attention as a means to solve modern social problems and the resulting decline in the quality of individual lives. Along with the interest in social robots, the spread of social robots is also increasing significantly. Many companies are introducing robot products to the market to target various target markets, but so far there is no clear trend leading the market. Accordingly, there are more and more attempts to differentiate robots through the design of social robots. In particular, anthropomorphism has been studied importantly in social robot design, and many approaches have been attempted to anthropomorphize social robots to produce positive effects. However, there is a lack of research that systematically describes the mechanism by which anthropomorphism for social robots is formed. Most of the existing studies have focused on verifying the positive effects of the anthropomorphism of social robots on consumers. In addition, the formation of anthropomorphism of social robots may vary depending on the individual"s motivation or temperament, but there are not many studies examining this. A vague understanding of anthropomorphism makes it difficult to derive design optimal points for shaping the anthropomorphism of social robots. The purpose of this study is to verify the mechanism by which the anthropomorphism of social robots is formed. This study confirmed the effect of the human-likeness of social robots(Within-subjects) and the construal level of consumers(Between-subjects) on the formation of anthropomorphism through an experimental study of 3×2 mixed design. Research hypotheses on the mechanism by which anthropomorphism is formed were presented, and the hypotheses were verified by analyzing data from a sample of 206 people. The first hypothesis in this study is that the higher the human-likeness of the robot, the higher the level of anthropomorphism for the robot. Hypothesis 1 was supported by a one-way repeated measures ANOVA and a post hoc test. The second hypothesis in this study is that depending on the construal level of consumers, the effect of human-likeness on the level of anthropomorphism will be different. First, this study predicts that the difference in the level of anthropomorphism as human-likeness increases will be greater under high construal condition than under low construal condition.Second, If the robot has no human-likeness, there will be no difference in the level of anthropomorphism according to the construal level. Thirdly,If the robot has low human-likeness, the low construal level condition will make the robot more anthropomorphic than the high construal level condition. Finally, If the robot has high human-likeness, the high construal levelcondition will make the robot more anthropomorphic than the low construal level condition. We performed two-way repeated measures ANOVA to test these hypotheses, and confirmed that the interaction effect of human-likeness and construal level was significant. Further analysis to specifically confirm interaction effect has also provided results in support of our hypotheses. The analysis shows that the human-likeness of the robot increases the level of anthropomorphism of social robots, and the effect of human-likeness on anthropomorphism varies depending on the construal level of consumers. This study has implications in that it explains the mechanism by which anthropomorphism is formed by considering the human-likeness, which is the design attribute of social robots, and the construal level of consumers, which is the way of thinking of individuals. We expect to use the findings of this study as the basis for design optimization for the formation of anthropomorphism in social robot

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이준식(Junsik LEE),한문환(Munhwan HAN) 한국정보과학회 2023 정보과학회지 Vol.41 No.9

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