마이크로파 여기 플라즈마광 생성을 위한 도파관 시스템 설계에 관한 연구

전상재,전후동,송창현,하석영,이승혁,이태호,박의준 금오공과대학교 2005 論文集 Vol.26 No.-

In this paper, the plasma lighting system(PLS) excited by the commercial high power magnetron is developed. The design concepts are based on maximizing the huninous efficacy in conjunction with the miniaturization of waveguide system Furthermore the fine tuning is simplified by using only one stub, and the impedance matching is maximized by introducing the tapering technique. The experimental results show that the luminous efficacy can be dramatically improved by the proposed design method.

실내사무환경의 환경성담배연기(ETS)의 지표물질에 관한 연구

하권철,백남원,박동욱,윤충식,김원,최상준,박지영,최인자,김신범,강태선 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.2

The purpose of this research is to evaluate indoor office environment using the concentrations of nicotine, 3-enthenyl-pyridine(3-EP), and respirable suspended particulate(RSP), which are indicators for environmental tobacco smoke(ETS) and the correlations between indicators and environmental conditions(smoking density, smoking index). The mean air charge per hour (ACH) in smoking rooms was 10.4 and most of the smoking rooms showed non-compliance withe ASHRAE standard value except only one smoking rooms. The concentrations of RSP, 3-EP, nicotine showed log=normal distributions, and became different statistically depending on smoking condition(p〈0.01). The geometric mean concentration of RSP in smoking room was 441.7 ug/㎡ that is far exceeded environmental standard(150 ug/㎡). This implies that fine particulate in smoking room should be carefully controlled considering smoking density and ventilation fate. The mean concentrations of nicotine and 3-EP were 93.4 ug/㎥, respectively. The correlation coefficients between RSP and SI, 3-EP and SI, and Nicotine and SI were 0.67, 0.84 and 0.74, respectively. The correlation coefficient between nicotine and 3-EP, nicotine and RSP, and RSP and 3-EP were 0.76,0.78 and 0.57 respectively.

廢紙纖維를 利用한 緩效性肥料가 콩의 生育, 收量 및 土壤에 미치는 影響

전하준,백준호,김태주 대구대학교 과학기술연구소 1997 科學技術硏究 Vol.4 No.3

The study was conducted to find out the effects of slow-released fertilizer(SRF) on the growth and yield of soybeans and in the soil. The plant height of soybeans was showed the higher in the SRF than in urea at early growth stage, but that showed the very similar results in both of SRF and urea at late growth stage. The chlorophyll content and photosynthetic activity of soybeans were higher in the SRF than in urea at 40days after sowing. Grain yield was not significantly different between in the SRF and in urea. Total nitrogen content in the grain and shoot of soybeans was showed higher in the SRF than urea. Nitrogen uptake in the grains of soybeans was similar results in both of the SRF and urea, but that of SRF in the shoot was higher than in urea. Efficiency of nitrogen in the SRF of soybeans was higher than in urea by 13.1%. Nitrogen content in the soil after experiment of SRF was lower than in urea.

일본근대문학의 그리스도교 수용과 전개

하태후,박영준,김윤택,박승호 한국문학과종교학회 2002 문학과종교 Vol.7 No.2

The influence of Christian religion to Japanese modern literature is seen from the Meiji dynasty, But we can not help be disappointed about the influence. Until late 20th century, the Christian religion literature which was accepted as the thought of Christianity, could not escape from an immature stage. Starting with Tokoku and Toson, it was the same as the situation to the writers of socialism, the Minyusha group, the Shirakaba group and naturalism. Christian religion was not giving them the power to live ultimately. And the relation of Christian religion and the writers has succeeded to Catholicism literature R. Akutagawa → T.Fori → S. Endo, and Protestantism literature R. Akutagawa → O. Dazai → R. Shiina. In the case of R. Akutagawa, it was not in the Christian Dogma, the church as a system or believer's behavior that he thought important. He discovered that the origin of the human existence itself, and the appearance of the suffering which carries 'Worldwide pain' itself at the existence to be called Christ. As he wrote in "The Western Man", 'I began to pay attention to Jesus Christ who is not only from the people of the path, but also from modern people looking back.' His confession is connected here deeply. Dazai read The Bible and he enlarged the consciousness of sin and resisted consciousness about impurity. The motive which Dazai read The Bible, was to throw away the thought of communism. It was for him filling the blanks of spiritually up due to the guiltiness of society. In any difficult situation, Dazai touched strongly upon the one spirit of the human, K.Uchimura, who overcame life to the support of his incompatibilities. He confessed that he entered, by foot, into the world of the faith and he was fascinated more with The Bible because he did the love of reading The Bible. After this, The Bible was melted and entered his works as the manual of life and ethics. It became civilized as the ethics to resist and to criticize the period. R.Shiina entered Christianity faith finally by influence of the Dostoevsky's literature that treated the problem of God in Christian religion. According to his trace of the spirit, Shiina's works are divided into three parts. First, the time to keep himself in existence as to fight hard with the despair and the nothingness. Namely, the works of the time which is groping for God. Second, the works of the time which reaches Christian religion faith. Third, the works of his later years which is subjected to the problem on freedom of the human, with he to fight against the heart disease of paroxysm. The works and life of Shiina as a whole, we can say, was walking to pursue the freedom and the problem of God that rescues the human. The problem of the authentication which the West differs from the East in "The Sea and Poison" by S.Endo is progressed as the problem of East reception of Christian religion and as the subject to be a motherhood faith in "The Silence". Via "The Edge of the Dead Sea", it is developed as a universal Jesus who 'a companion Jesus' to orientals. As it is reached "The Warrior", it presented a typical model of Christian religion of reception to the Japanese. In "Deep River", it is passed over the range of the religion and progress for an origin problem, a reality of the human and solution for existence. Since a visit to Japanese shores by Admiral Perry, a course of reception of a non critical though of Western Europe had happened. Endo's literature reflects constructive resolutions about a traditional thought of Japan and complicated problems which have agonized the solution in Japanese modern history.

시화호의 계절변화에 따른 지화학적 환경요인 특성 연구

김태하,박용철,이효진,김동화,박준건,김성준,이미연 한국환경과학회 2004 한국환경과학회지 Vol.13 No.12

Seasonal variation of biogeochemical characteristics was determined in Lake Shihwa from October 2002 to August 2003. When the lake was artificially constructed for the freshwater reservoir in 1988, the development of the strong haline density stratification resulted in two-layered system in water column and hypoxic/anoxic environment prevailed in the bottom layer due to oxidation of accumulated organic matters in the lake. Recently, seawater flux to the lake through the sluice has been increased to improve water quality in the lake since 2000, but seasonal stratification and hypoxic bottom layer of the lake still developed in the summer due to the nature of artificially enclosed lake system. As the lake is still receiving tremendous amount of organic matters and other pollutants from neighboring streams during the rainy summer season, limited seawater flux sluicing into the lake may not be enough for the physical and biogeochemical mass balance especially in the summer. The excess of accumulated organic matters in the bottom layer apparently exhausted dissolved oxygen and affected biogeochemical distributions and processes of organic and inorganic compounds in the stratified two-layered environment in the summer. During the summer, ammonia and dissolved organic carbon remarkably increased in the bottom layer due to the hypoxic/anoxic condition in the bottom layer. Phosphate also increased as the result of benthic flux from the bottom sediment. Meanwhile, dissolved organic carbon showed the highest value at the upstream area and decreased along the salinity gradient in the lake. In addition to the sources from the upstream, autochthonous origin of particulate organic carbon from algal bloom in the lake might be more important for sustaining aggravated water quality and development of deteriorated bottom environment in the summer. The removal of trace metals could be attributed to scavenging by strong insoluble metal-sulfide compounds in the hypoxic/anoxic bottom layer in the summer.

매크로/마이크로 레벨 볼트 결합 구조물에서의 실험적/해석적 방법을 통한 시스템 특성 비교

김봉석,이성민,이문구,이수훈,Jun Ni,송준엽,이창우,하태호 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

As the micro technology and miniaturization of a structure and component in the last couple of decades have been concretely realized, the understanding of structural and dynamic characteristics and prediction of dynamic behavior are indispensable to the miniaturized structures and micro machines. This paper shows the effect of dynamic characteristics in bolt-jointed structures by comparing natural frequencies and mode shapes between macro and micro-scale beams through experimental modal analysis and finite element analysis with a1 8 test models by materials, by size, and by joining condition; that is, SS41 and A16061-T651, micro and macro, and monolithic beam and bolt-jointed beam.

만화 과제를 이용한 정신분열병 환자의 사회인지 능력의 측정

오정은,나명현,하태현,신용욱,노규식,홍순범,이경진,신민섭,이영호,권준수 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.3

Objectives : This study is to investigate the hypothesis that schizophrenic patients have difficulty in inferring mental state of others. Methods : Twenty schizophrenic patients and twenty normal subjects were administered to the Cartoon Task required inferring the character's intention in a given context. Results : The schizophrenic patients showed a statistically significant impairment in the Cartoon Task. Both groups chose the card depicting a frequent everyday action significantly more rather than the similar card to the last picture in each story for wrong answers. Conclusion : These preliminary results suggest that schizophrenia is associated with a specific deficit of the cognitive ability referred to as social cognition, and this deficit can be detected not only in the acute phase as found in previous research studies, but also in remission. Also when subjects fail to appreciate what is going on in the minds of other people, they seem to rely on a socially familiar experience.

가상공간의 가공 공정과 상태 구현에 관한 연구

이수훈,김봉석,홍민성,김종민,JUN NI,박상호,송준엽,이창우,하태호 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

This paper presents virtual machining system in order to realize turning process in virtual space. A reliable virtual turning process simulation was developed based on the surface shaping system which is capable of considering geometric model, thermal error model, and vibration model. Accuracy of surface shape resulting from proposed machining simulator was verified experimentally. This paper also developed the watchdog agent that continuously assessed, diagnosed, and predicted performance of products and machines in machining. The Watchdog agent extracted feature signal using time-frequency analysis among various signals from multi-sensor and evaluated machining condition using performance confidence value.

마이크로 팩토리 물류이송용 평면모터

이창우,송준엽,하태호,정영상 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

The micro factory of size is so small that consuming power is reduced and also manufacturing line could be easily reconfigurable. The micro factory is required automation to satisfy high productivity. It is one of the big problems to convey goods, In case of automated reconfigurable micro factory. Planar motor that can perform linear motion in XY direction is one of solution that solves this problem. But conventional planar motor using a magnetic force has a disadvantage that planar motor base is permanent magnet. In this paper we consider new type of a planar motor based on principle of ultrasonic waves using PZT.

Evaluation of Agronomic Stability of North Korean Rice Varieties using Statistical Models

O-Young Jeong,Jeom-Ho Lee,Ha-Cheol Hong,Eung-Gi Jeong,Jin-Soo Paek,Chang-Ihn Yang,Yong-Hee Jeon,Myeong-Ki Kim,Kyu-Seong Lee,Sae-Jun Yang,Young-Tae Lee 韓國作物學會 2008 한국작물학회지 Vol.53 No.1

This experiment was carried out to evaluate the agronomic stability of North Korean rice varieties using the statistical model developed by Grafius, Finlay, and Ever hart. The lowest yearly variation based on coefficients of variation was found in Hannam 29 for number of panicles per hill, in Sijoong 9 for number of grains per panicle, in Pyeongyang 3 for ripened grain ratio, in Sijoong 16 for 1,000 grain weight, and in Yeomju 1 for grain yield. By Grafius's model, Pyeongbook 3, Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups show stable for 3 years. Weonsan 66 in early maturing groups and Seohaechalbyeo in medium maturing groups were found to be highly stable as analyzed by both Finlay and Wilkinson's model and Everhart & Russell's model. With reference to three models, Weonsan 66 was highly stable for 3 years with showing more yield than Odaebyeo in early maturing groups while Seohaechalbyeo was highly stable for 3 years with showing high yield than Hwaseongbyeo in medium maturing groups above 5~;t~;ha-1 of milled rice respectively.