플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

다차원 신호모형 해석을 통한 DOA 추정기법

박남철,최명수,박형준,김경호,이성로 목포대학교 정보산업연구소 2000 情報産業硏究誌 Vol.8 No.-

The Location-Informing service is based on the GPS data from the satellite. Until now, the service has been free. However, it may become charged. Therefore, we research the methods that can find the location-information using the antennas in future mobile communication systems and investigate the signal arrival direction estimation methods with considering practical environments.

산업폐기물인 폐주물사를 혼입한 콘크리트의 최적배합설계

박재선,김태경,백민경,이주형,윤경구,김남윤 강원대학교 석재복합신소재제품연구센터 1997 석재연 논문집 Vol.2 No.-

산업폐기물인 폐주물사를 재활용하여 에너지 절감과 환경오염효과를 얻을 수 있다. 반요인실험법을 사용하여 폐주물사를 잔골재에 일정비율 치환한 콘크리트의 최적배합설계 제시를 위한 예비실험에서 물-시멘트비, 폐주물사의 잔골재 치환율, 잔골재율, 슬럼프와 같은 주요변수와 변수사이의 2차상호작용을 파악하였다. 예비실험결과 폐주물사의 잔골재치환율을 70%까지 실시하였을 때 폐주물사를 혼입한 콘크리트의 강도발현에 가장 중요한 변수는 물-시멘트비로 분석되었고 폐주물사의 잔골재치환율은 거의 영향이 없는 것으로 분석되어 폐주물사를 콘크리트의 잔골재로 대체할 수 있음을 알 수 있었다. 각 변수의 2차상호작용에서는 폐주물사의 잔골재 치환율과 잔골재율의 상관관계가 콘크리트의 강도발현에 가장 큰 영향을 미치는 것으로 나타났다. 목표압축강도에 대한 최적배합조건을 폐주물사의 잔골재 치환율에 따라 물-시멘트비, 잔골재율에 대해 제시하였다. The waste foundry sand might be recycled in concrete, saving energy and protect-ing environment. An half- factorial experiments were performed with the primarary variable such as water- cement raito, waste foundry sand substitution ratio, fine agg-regate ratio and slump as a preliminary study for optimum mix design of concrete. The preliminary study show that the water- cement ratio is the most important factor to the concrete strength, followed by slump. The substitute of waste foundry sand up to 70% has little infulence, indicating that it can substitute the fine aggregate without damaging the Concrete strength. The interaction between waste foundry sand substitution ratio and fine aggregate ratio was most significant to the concrete strength among the 2-way interaction variable. Only compressive strength affect to the formation of optimum mix design area as target compressive strengh becomes bigger. Optimum mix designs of concrete incorporating waste foundry sand, satisfying the target responses, were proposed in terms of waste foundry sand substitution ratio, water cement ratio and fine aggregate ratio.

고등학교 학생들의 성에 관한 인식과 성교육에 대한 요구 조사 연구

남선영,정연강,박경숙,김화자 韓國學校保健學會 1995 韓國學校保健學會誌 Vol.8 No.2

A survey has conducted on two hundred high school students of the first and second grade by way of questionnaine in Seoul. The purpose of this study on the information from the survey is to cstimate the level of awareness and probe how they feel and what they wish on sex. X2 inspection is designed to assess general aspects of responded contents by way of percentage and examine degree of satisfaction on previously experienced sex education and demand for sex cducation. The result is as follows. 1. As a result of the examination of degree of awareness on sex of respondents, 62% delines sex as human relationship including moral values for harmony between men and women. 64% of the men and 70% of the women say that sex is a natural thing. It comes to the conclusion that most of the respondent sgenerally consider sex positive. On chastity, 68.5% of the respondent answer that it means physical chastity, 12.5% that chastity before marriage should be kept, and 43% that it should be kept as far as possible. Most of them pespond that it should be kept. 2. As a result of the examination on the contents of sex, they answer they know well in the order of masturbation(72%), pregnancy(76%), and sex(63%). Contraception, abortion and ejection are contents they poorly informed of. 3. As a result of the examination on expericncdc of sex education, 83% of men and 100% of women have experienced sex, education, but their degreeof satisfaction to it is very low. And 49% of the whole is dissatisfactory to it. There is some difference between male and female students.(p=0.000) That result translatcs that fcmale studeuts are educated on sex tjhrough more systematic subjects than male ones. In addition, it turns out that teenagers get most information on sex through friends, seniors, and mass media such as vidcos, TV and radios. Correct and systematic sex education is need because wrong information on sex culd be taught and bring them to misbehave. 4. 87.5% of the respondents answer that sex education is necessary, so that degree of necessity for sex education, turns out to be very high. Also the main subject that should perform sex education is in the order of school(50%), Society(24.5), home(18.5%). They respond that most appropriated period for the beginning of sex education is about elementary school age(43%), and 34% believes it to be put ahcad of elementary school age. Anurse teacher accounts for 54% for the main subject that addresses sex education, to male students visit teachers are most favored for 50%. As a result of those, it could be concluded that most high school students want sex education from responsible persons who have systematic and professional knowledge on sex. 5. In order to perform proper sex education by the above results, better educational effects are obtained when characteristics and natures of teenagers are known and most wanted knowledge by them is taught in priority in times of planning sex education. Besides, the contents of sex education suitable for each school should be planned before elementary school age and sex education should be performed in accordance with students' demand. In addition, sex education should be attentively performed by home, all organizations of socicty as well as school. Therefore, sex education will play a great role in making teenagers reestablish their conception on sex when the traditional and moral value systems of our country and the new value systems which are being formed under the influcnce of the western culture are in harmony.

有機質 施用量 差異가 麥門冬의 生育 및 收量에 미치는 影響

趙南棋,宋昌吉,朴良門,玄京卓 濟州大學校亞熱帶農業硏究所 1996 亞熱帶農業硏究 Vol.13 No.-

SummarySix organic matter rates (0, 1000, 1,500, 2,000, 2,500 and 3,000Kg/10a) were examined for their effects on growth and tuberous root yield of Liriope platyphylla Wang et Tang.The results obtained were summarized as follows;Both plant height and no. of tuberous roots per plant were greatest at 2,000kg of organic matter per 10a. Leaf width and root length were not significantly affected by organic matter rate. Root weight was increased as organic matter was increased from 0 to 2,500kg/10a and then decreased at 3,000kg. Weight of tuberous root, dry wt. of tuberous root and fresh weight were increased with increasing organic matter from 0 to 2,000kg/10a and then decreased with more than 2,500kg. SPAD reading of leaves was not significantly affected by organic matter rate. Results indicate that recommendable application quantity of organic matter for Liriope platyphylla Wang et Tang was about 2,000kg/10a in Cheju.

한국노인약물역학코호트에서 폐암 발생률, 사망률 및 생존율, 1994-1998

최남경,윤경은,허대석,김윤이,이승미,박병주 한국역학회 2002 Epidemiology and Health Vol.24 No.2

Purpose : This study was conducted to estimate incidence, mortality and survival rate of lung cancer in the elderly people in Korea. Methods : Study population was Korean Elderly Phamacoepidemiologic Cohort (KEPEC). The lung cancer incidence cases were detected from three different sources, medical utilization database of the Korea Medical Insurance Corporation (KMIC), the database from the National Cancer Registry, and the database from the Regional Cancer Registry. The hospital survey to confirm the final diagnosis of the potential cases was conducted. A specialist on lung cancer reviewed the abstracted data to confirm the final diagnoses. The lung cancer death cases were detected from the mortality database at National Statistical Office. Incidence rate, survival rate and mortality rate of lung cancer and their 95% confidence intervals were estimated with SAS Window ver.8.1. Results : There were 213 confirmed lung cancer cases in KEPEC between Jan. 1994 and Dec. 1998. Age-standardized incidence rate of lung cancer to the Korean population was estimated to be 316.9 per 100,000 person-years in male and 65.2 per 100,000 person-years in female. Age-standardized mortality rate of lung cancer to the Korean population was estimated to be 342.3 per 100,000 person-years in male and 84.8 per 100,000 person-years in female. One years survival rate was 17% in male and 11% in female. Two year survival rate was 2% in male and 4% in female. Conclusion : Age-standardized incidence rate, age-standardized mortality rate and survival rate of lung cancer in the elderly Korean may be useful for further study and making health policy for managing lung cancer in the elderly.

燐酸 施用量 差異과 麥門冬의 生育 및 收量에 미치는 影響

趙南棋,宋昌吉,朴良門,玄京卓 濟州大學校亞熱帶農業硏究所 1996 亞熱帶農業硏究 Vol.13 No.-

SummaryFive phosphate (P2O5) rates (0, 10, 15, 20 and 25kg/10a) was investigated for their effects on growth and tuberous root yield of Liriope platyphylla Wang et Tang grown in a volcanic ash-soil. The results obtained were summarized as the follows;Plant height, leaf length and no. of tuberous roots per plant were increased with increasing phosphate from 0 to 25kg/10a. Leaf weight, root weight, wt. of tuberous roots, fresh weight and dry wt. of tuberous roots on a plant basis were greatest at 25kg phosphate per 10a, and were decreased with decreasing phosphate rate. The phosphate rate did not significantly affect length, width, and SPAD reading of leaves. Results indicate that the optimum phosphate rate for Liriope platyphylla Wang et Tang would be above 25kg(/10a) in volcanic ash soils of Cheju province.

전남산 젓갈류의 유리아미노산 조성

허남칠,김선민,박은령,박평심,김경수,이명렬 조선대학교 기초과학연구소 1998 自然科學硏究 Vol.21 No.1

This study was designed to investigate the free amino acid compositions of salt-fermented fish products in the markets of Chonnam area. The results were as follows : The free amino acid compositions of salt-fermented fish products had varying figures according to the species of raw materials, that is, lysine and leucine were relatively abundant in Myul-chi jeot (salt-fermented anchovy), arginine inSae-woo jeot (salt-fermented small shrimp), glutamic acid inJa-oi jeot (salt-fermented small shrimp). lysine, arginine, alanine and phenylalanine in To-h jeot (salt-fermented trout), etc. Essential amino acid contents were contained 31.02%∼83.46% of total amino acids in all sample, and lysine and leucine were most abundant among essential amino acids. Especially tryptophan was the richest in Cham-jo-gae jeot, phenylalanine in To-ha jeot, Kal-chi-nae-jang jeot and Song-eo jeot in other essential amino acids. because the degree of protein degradation wouldl be influenced on fermentation periods, salt-concentration, fermentation temperature, etc, we expected more systemic research by some varied conditions and the developed analytical techniques on the salt-fermented fish products should be followed.

4세대 이동 멀티미디어 시스템의 연구동향 분석

최명수,박형준,박남철,김경호,이성로 목포대학교 정보산업연구소 2000 情報産業硏究誌 Vol.8 No.-

In this paper, we first define 4th-generation multimedia systems that play an important role in 21C information society. Nest, we investigate and analyze the international trend of the related research and then predict the evolutionary model for 155Mbps wireless mobile multimedia systems.

HFC-134a와 대체냉매 HFC-152a에 CF_3I를 혼합한 자동차냉매 특성

권일욱,박찬수,홍경한,문기선,최운수,서의경,윤갑식,이종인,하옥남 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.1

These days, an attention of environment has been increasing all over the world. to prevent the green house effect and destruction of an ozone layer, an ozone destruction potential(ODP) be zero and a refrigerant for low global warming potential(GWP) is needed. HFC-134a, in which hydrogen is mixed instead of chlorine is a refrigerant used for automobile conditioners and its destruction potential is ecologically zero. However, it is not considered as a perfect substitutive refrigerant as its GWP is high. It is studied refrigerant mixtures in which HFC-134a, HFC-152a and CF_3I with low GWP and zero ODP are mixed by experimentally and concluded as follows; 1. with the variation of speed of compressor outside temperature and flow rate, the heat of evaporator and compressor and coefficient of performance was varied, and influenced the air conditioner. 2. The pressure of evaporator was decreased with increasing the speed of compressor and that of the refrigerant HFC-134a was higher 21% than that of azotrope refrigerant mixed with CF_3I. The overall capacity of condensor and evaporator was increased and HGC-134a was higher than azotrope refrigerant mixed with CF_3I 3. The capacity of evaporator with the refrigerant HFC-134a was higher 6% than azotrope refrigerant mixed with CF31 and the required power with zaotrope refrigerant mixed with CF_3I was higher 11% than that of HFC-134a. 4. The COP of the refrigerant FHC-134a was higher 31% in 1000RPM. when outside temperature was increased, COP was decreased. 5. Performance of HFC-134a is better than azotrope refrigerant mixed with CF_3I but prefered zaotrope refrigerant mixed with CF_3I considering the environment.