열전 모듈의 정전압 출력 시스템을 위한 벅-부스트 DC-DC 변환기

조성규(Sungkyu Cho),박순서(Soonseo Park),김지곤(Jigon Kim),남기훈(Kihun Nam),김시호(Shiho Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.10

We have proposed and fabricated a Buck-Boost DC to DC Converter for Thermoelectric generator (TEG) with constant output voltage suitable for battery chargers or constant voltage supplies in the range of several watt. The experimental and simulation results have shown that the proposed method allows stable operation with maximum 86% power transfer efficiency. The proposed circuit has a merit in cost and miniaturization of a system compared to conventional MPPT algorithms, because the proposed method adopts only analog circuit without DSP or micro controller unit for calculating peak power point by iterative methods.

자율 순찰 로봇을 위한 심층학습 기반 화재 감지 시스템 구현

조성규(Sungkyu Cho),장현우(Hyunwoo Jang),길수현(Suhyun Gil),박황선(Hwangseon Park),오태근(Taegeun Oh),이성진(Sungjin Lee) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.6

LonWorks 시스템을 이용한 소형빙축열 에어컨의 병렬 제어

김홍열(Hongryeol Kim),조성규(Sungkyu Cho),정남종(Namjong Chung),김대원(Daewon Kim) 대한전기학회 2003 대한전기학회 학술대회 논문집 Vol.2003 No.7

열전 모듈의 SPICE 모델링

박순서(Soonseo Park),조성규(Sungkyu Cho),Nyambayar Baatar,김시호(Shiho Kim) 大韓電子工學會 2010 電子工學會論文誌-SD (Semiconductor and devices) Vol.47 No.4

열전소자의 SPICE 모델을 유도하였고, Harman method를 이용하여 전기적인 측정과 열전 소자 양단면의 온도 측정값 만으로 모델 파라미터를 추출하기 위한 방법을 제시하였다. 본 논문에서 제시된 SPICE 모델 파라미터 추출방식은 열전도 측정 데이터를 사용하지 않고, 모델 파라미터를 추출할 수 있으며, 기존의 열전도 측정에 의한 값과 비교하였을 때 오차가 크지 않아서 실제로 열전 모듈을 제작하였을 때 유용하게 사용할 수 있는 방법이 될 수 있음을 보였다. 제시된 SPICE 모델은 열전모듈을 이용한 냉각 장치와 열전 발전 장치의 열적 시뮬레이션과 전기적인 시뮬레이션에 모두 적용이 가능하다. We have developed a SPICE compatible model of thermoelectric devices, and a parameter extracting technique only by electrical and temperature measurement by using Harman method was proposed. The proposed model and parameter extraction technique do not require experimental data from thermal conductivity measurements. The maximum error between extracted parameters extracted by proposed method and conventional method was about 14%, which is not a severe mismatch for real application. The proposed model is applicable to design of both for thermoelectric coolers and thermo electric generators.

인공지능 병원 안내 로봇에 관한 연구

유지상 ( Jisang Yoo ),박민수 ( Minsu Park ),조성규 ( Sungkyu Cho ),정형준 ( Hyeoungjoon Jeong ),박상욱 ( Sanguk Park ),이성진 ( Sungjin Lee ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2

최근 인건비보다 저렴하게 사용할 수 있는 자율주행 로봇에 대한 수요가 증가하고 있다. 팬데믹의 영향으로 마스크 착용과 체온 측정이 의무화되어 키오스크, 체온 측정기와 같은 비대면 서비스의 수요 또한 증가하였다. 하지만 이러한 기능들은 각기 다른 기계에서 독립적으로 사용되며, 현재 보급된 자율주행 로봇을 병원에서 사용하기에는 적합하지 않다고 판단하였다. 본 연구에서 개발한 마스크 착용 여부 확인, 체온 확인, 자율주행을 활용한 안내 기능을 탑재한 인공지능 병원 안내 로봇을 통해 의료진의 업무 효율화 및 잠재적 비용 감소 효과를 기대한다. 본 연구에서는 마스크 착용 여부 확인을 위해 사용한 YOLOv5 알고리즘 훈련 결과를 통하여 높은 성능을 확인하였고 열화상 카메라를 사용한 체온 측정 알고리즘을 개발하였다. 또한, 실내 자율주행 실험을 통하여 Cartographer, Navigation 기능의 정상적으로 작동함을 확인하였다.

인공지능 병원안내 로봇에 관한 연구

유지상(Jisang Yoo),박민수(Minsu Park),조성규(Sungkyu Cho),정형준(Hyeoungjoon Jeong),박상욱(Sanguk Park),이성진(Sungjin Lee) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.2

Mark Twain의 비관주의와 도덕적 이상주의(3)

趙成圭 연세대학교 인문과학연구소 1986 人文科學 Vol.56 No.-

The main purpose of this writing is to consider Mark Twain as a serious writer. All too often he has been misunderstood as one merely giving witty comments on life to entertain his readers. Another line of thinking doing scant justice to Mark Twain is examplified in Maxwell Geismer's Mark Twain: An American Prophet, in which the author concludes that Twain's thoughts reveal him to be a “natural and unconscious Marxist.”In this article I take issue with such positions. Mark Twain's ideals and thoughts inhis social criticism are characterized by his firm belief in American ideals, not by his “natural and unconscious Marxism.” Like Walt Whitman, Mark Twain was convinced that American democracy offered the best climate, not only for material progress, but also for spiritual and moral development. This is divided into three chapters. The First Chapter, entitled “The Humanist Quarrelling with God,”deals with Mark Twain's religious background, his criticism of the Christianconception of God and of “Christian Science”in particular, and his deterministic view of the universe. The second Chapter, entitled “Mark Twain's Negative Views of Man”deals with the view of man as presented in his writings. The chapter ends with the discussion of the limitations of deterministic views of man, also entertained by Twain. The Third Chapter, entitled “Mark Twain's Moral Idealism,”discusses Mark Twain's conscience and ideas, his denunciation of all forms of prejudice, and his pursuit of truth and honesty. Though much of Mark Twain's writings are overshadowed by his mechanistic determinism, Mark Twain is at heart a romantic idealist. This dichotomy is a unique feature of Mark Twain's thoughts. In spite of his religious skepticism, he clung firmly to his belief in a Supreme Being, who had created the universe and whose majesty and wisdom are revealed in physical nature. Seeing nobility and goodness in individuals, he regarded the human race collectively as stupid, mean, and despicable. And yet, his heart was filled with pity and sympathy for doomed mankind, the victim of forces beyond his control, thus admitting a glimmer of hope for human betterment. Hence, the ambivalence of Twain's views of man.

Mark Twain의 兩面性

趙成圭 연세대학교 인문과학연구소 1973 人文科學 Vol.30 No.-

The purpose of this article is to eliminate the prevalent notion that Mark Twain became suddenly pessimistic after experiencing personal misfortunes toward the end of his life. Many critics, it is true, have been concerned with the duality of Mark Twain in terms of biographical or structural considerations. However, we encounter, with the subject of duality, one of Mark Twain's most persistent insights into man's nature. Therefore, the subject of Mark Twain's duality has been traced from The Prince and the Pauper (1882), in which he began developing the concept of his duality as a narrative device with thematic implications. The dark side of Man's nature is concretely shown in The Mysterious Stranger, Letters from the Earth, “The Damned Human Race,” and “What is Man?” This growing pessimism led him to speculate about the dichotomy of good-and-evil in relation to man's nature, Basically he found that the duality of good-and-veil is caused by the disparity between man's “low” impulses, drives, and instincts and “high” social and moral code. This disparity was obvious to some extent even in Huck Finn, Pudd'nhead Wilson, and other works. Therefore, we can conclude that the was interested in this duality even when his humor seemed light-hearted in the minds of many readers. His preoccupation with the dark side of man's nature, with him from the very beginning, was not merely a new development toward the end of his life.

Mark Twain의 비관주의와 도덕적 이상주의 (1)

趙成圭 연세대학교 인문과학연구소 1985 人文科學 Vol.54 No.-

The main purpose of this writing is to consider Mark Twain as a serious writer. All too often he has been misunderstood as one merely giving witty comments on life to entertain his readers. Another line of thinking doing scant justice to Mark Twain is examplified in Maxwell Geismer's Mark Twain: An American Prophet, in which the author concludes that Twain's thoughts reveal him to be a “natural and unconscious Marxist.”In this article I take issue with such positions. Mark Twain's ideals and thoughts in his social criticism are characterized by his firm belief in American ideals, not by his “natural and unconscious Marxism.”Like Walt Whitman, Mark Twain was convinced that American democracy offered the best climate, not only for material progress, but also for spiritual and moral development. This is divided into three chapters. The First Chapter, entitled “The Humanist Quarrelling with God,”deals with Mark Twain's religious background, his criticism of the Christian conception of God and of “Christian Science”in particular, and his deterministic view of the universe. The Second Chapter, entitled “Mark Twain's Negative Views of Man”deals with the view of man as presented in his writings. The chapterends with the discussion of the limitations of deterministic views of man, also entertained by Twain. The Third Chapter, entitled “Mark Twain's Moral Idealism,”discusses Mark Twain's conscience and ideals, his denunciation of all forms of prejudice, and his pursuit of truth and honesty. Though much of Mark Twain's writings are overshadowed by his mechanistic determinism, Mark Twain is at heart a romantic idealist. This dichotomy is a unique feature of Mark Twain's thoughts. In spite of his religious skepticism, he clung firmly to his belief in a Supreme Being, who had created the universe and whose majesty and wisdom are revealed in physical nature. Seeing nobility and goodness in individuals, he regarded the human race collectively as stupid, mean, and despicable. And yet, his heart was filled with pity and sympathy for doomed mankind, the victim of forces beyond his control, thus admitting a glimmer of hope for human betterment. Hence, the ambivalence of Twain's views of man.

Mark Twain의 비관주의와 도덕적 이상주의(2)

趙成圭 연세대학교 인문과학연구소 1986 人文科學 Vol.55 No.-

The main purpose of this writing is to consider Mark Twain as a serious writer. All too often he has been misunderstood as one merely giving witty comments on life to entertain his readers. Another line of thinking doing scant justice to Mark Twain is examplified in Maxwell Geismer's Mark Twain:An American Prophet, in which the author concludes that Twain's thoughts reveal him to be a “natural and unconscious Marxist.”In this article I take issue with such positions. Mark Twain's ideals and thoughts in his social criticism are characterized by his firm belief in American ideals, not by his “natural and unconscious Marxism.”Like Walt Whitman, Mark Twain was convinced that American democracy offered the best climate, not only for material progress, but also for spiritual and moral development. This is divided into three chapters. The First Chapter, entitled “The Humanist Quarrelling with God,”deals with Mark Twain's religious background, his criticism of the Christian conception of God and of “Christian Science”in particular, and his deterministic view of the universe. The second Chapter, entitled “Mark Twain's Negative Views of Man”deals with the view of man as presented in his writings. The chapter ends with the discussion of the limitations of deterministic views of man, also entertained by Twain. The Third Chapter, entitled “Mark Twain's Moral Idealism,”discusses Mark Twain's conscience and ideas, his denunciation of all forms of prejudice, and his pursuit of truth and honesty. Thought much of Mark Twain's writings are overshadowed by his mechanistic determinism, Mark Twain is at heart a romantic idealist. This dichotomy is a unique feature of Mark Twain's thoughts. In spite of his religious skepticism, he clung firmly to his belief in a Supreme Being, who had created the universe and whose majesty and wisdom are revealed in physical nature. Seeing nobility and goodness in individuals, he regarded the human race collectively as stupid, mean, and despicable. And yet, his heart was filled with pity and sympathy for doomed mankind, the victim of forces beyond his control, thus admitting a glimmer of hope for human betterment. Hence, the ambivalence of Twain's views of man.