고속고압 방전간극을 사용한 질소 레이저의 동작 특성

양준묵,이치원,안근옥 충남대학교 자연과학연구소 1987 忠南科學硏究誌 Vol.14 No.2

We have constructed a nitrogen laser which is 42㎝ long has a rapid high-voltage spark gap and a multiple parallel capacitor-type Blumlein transmission line circuit, whose total capacitance is about 80 nF. The maximum output power of laser has obtained under the condition of nitrogen gas pressure of 80torr, spark gap spacing of 2.26mm and charging voltage of 10.5kV. Under these optimum conditions and maintaining constant stability of 0.02, this laser can be operated with a range of repetition rate, from 10 to 30.1 Hz. The value of E/P is 437 V.cm^-1. torr^-1 for maximum output power and 417 Vcm^-1. torr^-1 for optimum stability condition.

Blumlein 전송회로에 의해 선전리되는 질소레이저의 동작특성 연구

양준묵,추한태,이봉연,이치원 충남대학교 1990 忠南科學硏究誌 Vol.17 No.2

The design and construction of nitrogen laser preionized with a Blumlein transmission line circuit is described. For the power supply, we have used a pulse type high voltage power source that can be produce 10 joule energy in a pulse. The condition of maximum output power is observed at N_2 gas pressure of 100 torr, spark gap distance of 6.0 mm, repetition rate of 30Hz with preionization, and the stability increases by 0.7%. The maximum increment of output power is achieved at pressure of 200 torr when preionization is used. Finally we can increase the output power by approximately 60% by using this work, and the E/P value is 133 V㎝^(-1) torr^(-1).

다중 평행판 축전기형 전송회로를 사용한 질소레이저의 제작과 출력 특성의 기체 온도 의존성

김원호,양준목,추한태 충남대학교 기초과학연구소 1994 忠南科學硏究誌 Vol.21 No.1

We have studied the operational characteristics of a nitrogen laser system which consists of a laser tube of 200 ㎜ in length, multiple parallel plate capacitor type transmission circuitry, pulse type high voltage power source and temperature control system for the nitrogen gas. The optimum operational condition is measured to be 30 ℃ in gas temperature, 70 torr in gas pressure, and E/P of 411 (V/㎝.torr) at 4 ㎜ in spark gap spacing and 20 ㎐ in repetation rate. With increasing the nitrogen gas temperature, the optimum nitrogen gas pressure is found to be increased but the optimum value of E/P is decreased. These results are in accordance with the theory of other studies so far.

痰飮에 應用되는 小調中湯이 高脂血症에 미치는 影響

文濬典,崔達永,朴元煥,尹相柱 대한동의병리학회 1993 동의생리병리학회지 Vol.8 No.-

연구배경 : 최근 우리나라에 있어서도 생활 양식의 서구화로 말미암아 다발하고 있는 각종 현대병의 하나인 고지혈증을 한의학적으로 치료하기 위한 방법론의 개발을 연구목적으로 하여, 한의학의 전통적 병인 개념인 담음이론을 통해 고지혈증의 한의학적 개념을 설명하고, 〈의학입문〉처방인 소조중탕을 통해 치료 약재의 개발 가능성을 실험적으로 규명하고자 한다. 방법 : 실험동물에 cholesterol현탁액을 투여하여 고지혈증을 유발시키면서, 〈의학입문〉에 수재된 소조중탕을 투여하여 혈청지질에 포함되어 있는 total-cholesterol, H. D. L-cholesterol, triglyceride, phospholipid 등의 함량변화를 관찰한다. 결과 : 血淸中 total-cholesterol과 triglyceride含量에 미치는 影響은 對照群에 比하여 매우 顯著한 有意性있는 減少가 나타났으며, 血淸中 H.D.L.-cholesterol과 phospholipid含量에 미치는 影響은 對照群에 比하여 有意性있는 減少가 나타났으며, 血淸中 total cholesterol과 HDL cholesterol의 比率은 對照群에 比하여 有意性이 認定되지 않지만 total cholesterol과 phospholipid의 比率은 對照群에 比하여 有意性이 認定된다. 결론 : 祛痰之劑인 小調中湯은 高脂血症의 改善에 有意性있는 成績을 나타내므로 高脂血症과 痰飮은 相關性이 있으며 脂質代謝異常에 따른 動脈硬化症에도 活用될 수 있는 것으로 思慮된다. In order to study the effects of Xiaotiaozhongtang on hyperlipidemia, white rats were induced by lipid metabolism disorder by the oral-injection of cholesterol. The effects of Xiaotiaozhongtang on lipid in serum were measured by the quantity of total-cholesterol and of H.D.L-cholesterol and of triglyceride and of phospholipid, by the rate of total-cholesterol vs H.D.L-cholesterol and of total-cholesterol vs phospholipid in serum. As a result, we can conclude as follows: 1. Effects of Xiaotiaozhongtang on total-cholesterol and triglyceride levels in serum of cholesterol treated rats were very noticeable. 2. Effects of Xiaotiaozhongtang on H. D. L-cholesterol and phospholipid levels in serum of cholesterol treated rats were noticeable. 3. Effect of Xiaotiaozhogtang on the rate of total-cholesterol vs H. D. L-cholesterol in serum of cholesterol treated rats was unnoticed, but on the rate of total-cholesterol vs phospholipid was noticeable. Thus,as the above-mentioned, on hyperlipidemia, the effects of Xiaotiaozhongtang can be recognized. Secondly, both hyperlipidemia and "phlegm-retention" have correlation each other. In the last place,Xiaotiaozhongtang may be used to artherosclerosis induced by, lipid metabolism disorder, hyperlipidemia.

하수슬러지 중의 중금속

이원준 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-

In utilization of sludge as an fertilizer for soil, heavy metal concentration is critical in terms of toxical effects. The heavy metal contents in the sludge can contaminate the soil in long term basis, and the contamination of heavy metal in soil will not be attenuated in nature. This study review the heavy metal standard for sludge used for fertilizer in Korea, Japan, Europe, and America, and the sludge produced in four wastewater plant was investigated. In conclusion the sludge produced from wastewater plant receiving wastewater from industrial complex exceed the Cadmium standard of fertilizer, but other sludge can satisfy the standard. However, the overall heavy metal contents were high enough to consider long term effect.

二重 傳送回路를 사용한 窒素 레이저의 特性

梁俊默,李致遠 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.2

We have studied on the economic construction and operational characteristics of the nitrogen laser. The laser tube is 66㎝ long with variable electrode-gap-spacing coupled to the transmission line circuit. This transmission line circuit is assembled with tow sets of Blumline transmission line circuits, which we call the double transmission line circuit. Each transmission line circuit consits of 3 sheets of 0.188㎜ mylar films and 4 sheets of aluminum foils. the optimum operational conditions of this nitrogen laser are 80torr in nitrogen gas pressure and 6500volts in voltage. In this conditions, we have measured that, repetition rate is 21㎐,the stability of the optical power is 70% and E/p is 270 volts /㎝-torr which was measured to be 2.5 times as large as that of the othe reports so tar.

국내 말라리아 상황과 연구동향

고원규,정준용 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.1S

Vivax malaria has re-emerged in the northern part of the Republic of Korea from 1993 after over 10 years absence. The number of cases has increased every year and reached to about 3000-4000 a year. Thanks to this epidemic researches and developments on malaria is activated in the country. Some important achievements produced by Institute of Malariology. Inje University are introduced. The geographical distributions of patients and antibody titers showed the characteristic of border malaria. Thus collaborative efforts with North Korea are necessary to control this epidemic successfully. In this epidemic, two different genotypes were found In the genes of CSP, DBP, MSP-1 (ICB 4-5), and AMA-1. The DNA structures of the genes were similar to them from East Asia. 58% of 80 patients' blood shows single genotype in each gene had a combination of genotypes (CSP SK-A:DBP SK-I:MSP-1), and 29% of them has another (CSP SK-B:DBP SK-Ⅱ:MSP-2). Thus it was concluded that genetically different two strains (KOR1 and KOR2) of P. vivax were mainly distributed in the endemic area. One-shot multiplex PCR was designed for differential diagnosis of two major species of Plasmodium by targeting the 18s rRNA gene. In an evaluation on 210 clinical samples the new PCR test showed very high feasibility, sensitivity (100%), and specificity (100%). Malaria is one of major infectious diseases in the world, causing 300-500 million clinical cases and more than one million deaths each year. The importance of vaccine and new drugs for malaria must be stressed.

우리나라 주식시장의 일월효과에 관한 연구

이준석,안성연,조정원 東亞大學校 1997 東亞論叢 Vol.34 No.-

Recently many market anomalies such as the size effect, the P/E effect and the January effect have been reported in the stock market. The January effect represents a strong evidence against the efficient market hypothesis. If investors are rational and the market is efficient, there can be no reason that returns in some specific months are higher than returns in other months. Nevertheless, many empirical evidences on stock return anomalies have been found in major stock in the world. Using Korean stock data, Kim(1990), and Koh and Rho(1993) reported the Januay effect . However, these reports have certain limitations due to the lack of both time periods and data used for the research. To get more persuasive and comprehensive evidence, this work attempts; 1. to test the existence of stock return data using monthly stock return series from January 1980 to December 1995. Both of parametric test and non-parametric test are applied. 2. to test the weekly stock return data. Therefore the number of observations has been increased. 3. to test the relationship between the stock price index by the sizes; small, middle, large and overall. The test results in this work are summarized as follows: 1. Using monthly data, the monthly effect was found in middle sized firms. 2. Using weekly data, the January effect was found in small sized firms. 3. The size effects of 1987, 1990,1993 and 1994 were significant.

다극형 스파크 �b과 다중평행판 축전기형 전송회로를 사용한 질소레이저의 동작특성

장철용,박영수,양준목,이치원 충남대학교 기초과학연구소 1994 忠南科學硏究誌 Vol.21 No.1

We have studied on the operational characteristics of a nitrogen laser which was coupled with a multiplex parallel capacitor type Blumlein transmission line circuit and a multiplex sparkgap. This spark gap consisted of 8 pairs of electrode and was 50 ㎝ in length, as long as the laser tube. According to increasing the number of electrodes in the spark gaps up to the 6 pairs, the output power and stability of the laser was increased. It was to be improved that the multiplex spark gap was operated as a good peformance to the nitrogen laser system. The optimum operational condition of the nitrogen laser at 20㎐ of repetition rate could be obtained with the nitrogen gas pressure of 80 torr, E/P value of 325.0 v/㎝ torr at the electrodes spacing 5.0 ㎜ and of 90 torr, E/P value of 311.1 v/㎝ torr at the electrodes spacing 6.0 ㎜ respectively.

나선형 이중 평행판 축전기형 Blumlein 전송회로를 사용한 소형 질소레이저의 동작 특성 연구

양준묵,이치원,조돈수,이봉연 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1

The design and performance of a compact nitrogen laser which consists of a Spiral multiple parallel plate capacitor type Blumlein transmission line circuit are described. The laser tube is made by 50 ㎜ long with a 2.5 ㎜ main electrode gap spacing. The output power increased with the spark gap distance. The peak power of 3.0 μJ has been obtained with a spark gap distance of 3.5 ㎜ and a repetition rate of 30㎐. The optimum nitrogen gas pressure was about 60torr independent of the variation of spark gap distance. The laser operates with repetition rate of up to 70 ㎐.