자유와 권위

황문수,카알야스퍼스 고려대학교 철학연구소 1960 철학연구 Vol.0 No.3

짝수 고조파 성분을 이용한 아날로그 전치 왜곡 선형화기 설계

황문수,전기경,김일규,조숙희,김영,김병철,Hwang Moon-Soo,Jeon Ki-Kyung,Kim Ell-Kou,Cho Suk-Hui,Kim Young,Kim Byung-Chul 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.1

본 논문에서는 고조파 발생기의 짝수 고조파 성분을 이용하여 전력 증폭기의 3차와 5차 혼변조 왜곡 신호를 개별적으로 개선할 수 있는 전치 왜곡 선형화기를 제안하였다. 제안된 선형화기의 고조파 발생기는 2차와 4차 고조파 성분을 추출할 수 있는 소 신호 증폭기로 구성되어 있으며, 또 2차와 4차 고조파 성분들은 벡터 모듈레이터에서 주 신호와 진폭 변조되어 3차와 5차 전치 왜곡 혼변조 신호를 개별적으로 발생시킬 수 있게 된다. 이렇게 전치 왜곡된 신호는 2차와 4차 고조파 신호의 크기만 변화시킴으로써 각각의 혼변조 신호의 크기와 위상을 조절할 수 있으며, 이것을 이용하여 전력 증폭기의 3차와 5차 혼변조 왜곡 신호를 각각 억제하는 선형화기를 구현하였다. 이러한 전치 왜곡 선형화기의 타당성을 입증하기 위해 2-톤 신호를 전력 증폭기에 인가하여, 3차와 5차 혼변조 왜곡 신호를 각각 25 dB, 18 dB 개선을 시켰으며, IS-95 CDMA 신호를 인가하였을 경우 인접 채널 전력비가 7 dB 이상 개선되는 것을 확인하였다. This paper proposes a new predistortion linearizer with controlling intermodulation distortion(IMD) signals. This linearizer achieves independent control of third- and fifth-order intermodulation distortion products using amplitude modulation with even harmonic signals. A vector modulator that modulate fundamental signal with both second- and fourth-order harmonic components generated by harmonic generator circuits, generates the inverse characteristics third-and fifth-order intermodulation signals of power amplifier and controls amplitude and phase of them with each other modulation factors. As a results, this linearizer is suppressed IMD signals of power amplifier effectively. The test results show that the third IMD is cancelled more than 25 dB and the fifth order IMD is cancelled about 18 dB for CW two-tone signals. Also, it's improved the adjacent channel power ratio(ACPR) more than 7 dB for IS-95 CDMA signals.

『베니토 세레노』에 나타난 허만 멜빌의 자연관과 인종에 관한 견해

황문수 한국중앙영어영문학회 2002 영어영문학연구 Vol.44 No.4

『Benito Cereno』based on the revolt that negroes raised on ship in slave-trading days, has a similarity of Melville's other works. Color grey thickly imbued in the introductive chapter heralds symbolic meanings to the whole contents, with the creation of ambiguity and mystery. 『Benito Cereno』unfolds with the downward spiral fall, in which Delano is destined to suffer from endless frustration and despair, ultimately facing the limitation of human faculty. Through such experience, he realizes that things in the universe are managed and controlled not by human faculty, but by the Nature, or a God. That is, he was unconsciously saved by the mysterious power of Nature or of a transcendental being similar to that in 『Benito Cereno』conveying Melville's viewpoint of nature, racial con-flict with the revelation of the dark side of western society through the polarity, is considered as another Melville's novels searching for truth with-in the human condition.

멜빌의 작품에 나타난 이원적 갈등의 근원과 그 전개

황문수 한국중앙영어영문학회 1999 영어영문학연구 Vol.41 No.2

억압과 자유

황문수 덕성여자대학교 1986 근맥 Vol.17 No.-

대학문화와 자치활동

황문수,Hwang, Mun-Su 한국대학교육협의회 1985 大學敎育 Vol.17 No.-

성인의 스포츠활동 참여동기 활성화 및 참여장애 개선 방안 연구

황문수,이종형 한국체육정책학회 2012 한국체육정책학회지 Vol.10 No.1

The purpose of this study is to re-discover sports events of adults participating in sports activities using commercial sports facilities and obtain basic data for development of adults' physical education in order to help adults participate in sports activities more effectively. The researcher conducted a survey of the following items on 764 adults that utilize commercial sport facilities located in K-do and D metropolitan city; the influence of motive and obstacle to participation in commercial sports facilities having on satisfaction degree of participation and satisfaction degree of life. The items used in the preceding study was used after correcting and complementing in accordance with this study. The collected research data was computerized using SAS program and LISREL; the findings were as follows. Motive of, obstacle to and satisfaction degree of participation are different according to demo-sociological characteristics and participating events of sports. When motive participating in sports activities is high, satis faction degree of participation is high. When satisfaction degree of participation is high, satisfaction degree of life is also high. When obstacle to participation is high, satis faction degree of participation is low. When satisfaction degree of participation is low, satisfaction degree of life is also low. Demo-sociological characteristics, participating events of sports activities, motive of participation and obstacle to participation are having direct influence on satisfaction degree of participation in sports activities and satisfaction degree of life.

형질세포성 백혈병 2예

황문수,전봉균,손창학,이정녀,함건주 大韓血液學會 1990 大韓血液學會誌 Vol.25 No.1

정년 퇴직 교육 공무원들의 여가활동과 생활만족도

황문수,이철화 한국교원대학교 학교체육연구소 1998 학교체육연구소지 Vol.5 No.1

Stephen Crane의 作品에 나타난 恐怖와 色彩

黃文秀 청주대학교 대학원 1990 우암논총 Vol.6 No.-

The purpose of this study is aiming at examing the relationship of fear and color and the shade of heroes’ spiritual change and growth through f-ear and adventure described in Crane’s works such as The Blue Hotel, The Bride Comes to the Yellow Sky, The Open Boat, especiall well ir The Red Badge Courage. Born in Newark New, November 1, 1871, the fourteenth childs of Jonathar Townley, Stephen Crane lost his his parents in his early daya and he was forced to spend his childhood and adolescence in the period of many severe trials. His older brother and his sister playing the part of father and mother substitutes offered him a mental and material assistance and gave much influence on his life. His sister introduced the world of the color to him and prepared him fo an aesthetic exploration of his environment and his brother taught him ho to note facts with accuracy through his profession as a Journalist. Witl these experiences, he immersed himself in the literary world, but he was not much a sucess in his early literary days, impoverished and lonesone. Thus, he was underestimated by Joseph Conrad in his memoir as the impression that his work had been quite fragmentary, unfinished, brilliant without solidity and depth but he gradually created an impression that he wrote much more worth writings than people think. In 1950s, Crane was not only estimated as a highly conscious artist sillful in arranging incoherent structures and in charging images with Complex symbolic meanings but he was also elevated as a writer such as impressionist, ironist, naturalist. But with all this estimation, most critics say that he is not correctly valued as yet, remaining a challenge for readers. His Job as a reporter kept him closely in touch with fear, hunger, violence of the slum in the city and he became much interested in fear, hunger, violence. He introduced these themes to his heroes and characters and experienced them the crises of experiences. Through this hard flux of experience, his heroes are enabled to understand themselves and their environments and have deep insight to see the reality clearly. Going through this sultry nightmare, his heroes and characters become a man with a conscientiousness and responsiblity, getting out of his difficulties, feat and their early childish mental states, as seen in the example of his work, The Red Badge of Courage. In this description for spiritual growth of protagonists, Crane paints various shades exactly with colors as the impressionists do in pigments This kind of impressionism is an instrument for the representation of the moral and psychological inner change of the protagonist’s life. Crane’s use of colors, along with smile, metaphor, synaesthetic, is his distinct method different form classical writer’s, which gives us a vivid impression and makes us to understand the meaning more obviously thro-ugh the whole story than through the individual meaning as in the case of the French impressionist’s paintings. Conclusively, considering all these above mentions, we can’t but call Crane, who achives a perfect thematic and formal unity in the story of Fleming’s victory over himself thanks to the use of color and method in the impressionism, as one of the great real impressionist and original technician.