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박원명,김용찬,백인호 大韓神經精神醫學會 1986 신경정신의학 Vol.25 No.2
This is a clinical report of 4 cases of restless legs syndrome developed in patients diagnosed as major depressive disorder by DSM-III criteria, who were treated with "Mianserin" which is known as one of the new generation tetracyclic antidepressants. With the duration of the average of 1 or 2 weeks following the administration of mianserin, all of these patients showed characteristic symptoms of restless legs syndrome which included unpleasant creeping sensation and vague discomfort on the both legs at rest typically in the evening and during the night. For the prevention of exacerbation of these symptoms, hotbag, diazepam, lowering or discontinuation of mianserin, and shifting to another antidepressants including tricyclic antidepressants had concurrently been tried and proved effective.
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Micro-cavity형 광섬유 Fabry-Perot 간섭계의 형성 및 고감도 압력센서에의 응용
김명규,박동수,김창원,김진섭,이정희,손병기 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1
Because micro-cavity type optical fiber Fabry-Perot interferometric pressure sensor itself play a signal processing role, it has electrical safty and is immune to EMI(electro-magnetic interference). And it also has high sensitivity in the measured range and low sensitivity dependence on the thickness of diaphragm. Therefore it has many advantages, so it will be applicable to accelerate sensor, flow sensor, and microphone, etc.. In this paper, using silicon anisotropic etching technique and fiber optic sensing technique, micro-cavity type optical fiber Fabry-Perot interferometer was formed and a highly sensitive pressure sensor was fabricated. The fabricated micro-cavity type optical fiber Fabry -Perot interferometric pressure sensor showed repeatedly good output characteristics.
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유리화 하알변환 필터를 이용한 디지탈 거리계전 알고리즘에 관한 연구
박철원,신명철 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1
This paper presents the digital distance relaying by based on the RHT(rationalized haar transform) filter for the protection of EHV/UHV transmission line. The real and reactive components of apparant impedance calculation for distance relaying requires extraction of fundamental frequency components from highily distorted post-fault signals. Many algorithms involve a large amount of a computation and low accuracy and poor convergence. But proposed techniques is based on RHT filter, rationalized version of HT filter, reduce the computational burden of conventional digital filtering by orthogonal transform. To confirm the validity of the proposed algo rithm, we performed off-line simulation using data from Salford EMTP modelling. It is shown that the suggested algorithm is simple and reliable.
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윤명원,남궁 규완,최인규 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1
The nucleate boiling heat transfer of a single liquid droplet on heated surface was analyzed with two geometrically different droplet models, namely, one for constant contact angle θand the other for constant spherical radius r. It was assumed in the analysis that the basic heat transfer mechanism in the liquid droplet nucleate boiling on heated surface was mainly dependent on the bubble growth and separation within the droplet just as in the pool nucleate boiling. Accordingly Stralen's bubble model for the pool nucleate boiling was applied to derive the mean heat transfer coefficient during the evaporation of a liquid droplet. The time required for evaporation was computed utilizing the above derived mean heat transfer coefficient for the two models and compared with the experimental data. The discrepancy is very small and it suggests that Stralen's bubble model can be applied for the nucleate boiling of a single liquid droplet on heated surface successfully. It was also found that the droplet with larger initial contact angle, such as water and n-heptane, approached to the constant spherical radius model.
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Push-Pull Converter에 의한 대체에너지 발전시스템에 관한 연구
申明澈,元忠淵,梁承浩,金學成 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.1
대출력범위의 DC-DC 컨버어터는 가변 저입력과 일정한 고출력 전압의 특성을 가지고 있다. 1KW push-pull 컨버어터 시스템이 실험을 위하여 제작되었다. 이 컨버어터는 25KHz의 내부 주파수를 가진 1KW의 전력을 처리한다. 이 컨버어터는 종래의 전력레벨 컨버어터에 스위칭 레귤레이터의 장점을 살린 것을 의미한다. 고주파 스위칭의 사용으로 DC-DC컨버어터의 크기와 중량을 감소시키게 되었다. 이러한 감소는 주파수가 증가함에 따라 필커값과 변압기의 크기가 감소하기 때문에 일어난다. 그러므로 저자는 고주파 변압기와 출력필터의 설계기준을 언급하였다. 마지막으로 연료전지 및 태양전지 발전시스템이 제시되었다. In this paper, a DC-DC converter for multikilowatt power level is described which has the characteristics of variable low input voltage and constant high output voltage. An 1KW push-pull converter system was constructed for experimentation. This converter processes 1KW power with an internal freqency of 25KHZ, which means to turn the merits of the switching regulator to the conventional power level converters. The use of high-frequency switching allows the DC-DC converter designer to reduce the size and weight of the DC-DC converter significantly. This reduction occurs because of filter component value and transformer size decrease with increasing frequency. Therefore, the authors in this paper the design criterion of the high frequency transformer and output filter was mentioned. Finally, applications for an inverter used in a fuel cell generation and solar cell generation system are presented.
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高明元,沈相均 단국대학교 1985 論文集 Vol.19 No.-
This study is to determine the mean activity coefficient hydrogen chloride in the mixed solvent of water and methanol by measuring the electromotive force of the following cell; H_2|P_t(1atm)|HCl in the mixture of water and methanol|AgCl|Ag the calculated values of the activity coefficient is obtained from me extented Debye-Hu¨ckel equation. The observed values of the mean activity coefficient is compared with the calculated values. The origin that causes the difference between the observed values and the calculated values is investigated.
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임원명 德成女子大學校 1973 德成女大論文集 Vol.2 No.-
The aim of this study is to know the actual conditions of a toy in connection with all the various domestic environments. Todays, our society is a mode of life that we have to live soundly through a play with a toy in children and a productive actibity in adults. Although the real value of a toy in childhood has a important meaning, many adults, especially the parents who are in directive relation with the growth and the mature of children, have not to mind and lose sight of it, they seem to have a tendency that takes granted for it as a trifle. Therefore, I am to report about the value of a toy within a family and the various aspects that it has in connection with the domestic conditions.
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