小數캐리어 MIS Solar Cell의 最小 障壁 높이

李明敎 釜山工業大學校 1981 論文集 Vol.22 No.2

The theory of MIS-barriers heighht and thier electrical characteristics is examined for its application to solar cells. The saturation currents of minority-and majority-carrier MIS Solar Cells have been compared to find the value of the barrier height ?? , where the dominating saturation current changes from a majority-carrier current to a minority-carrier current. For an interfacial oxide layer of 20Å, the value of ?? has been calculated to be in the range 750~800mV, whereas for an oxide layer of 10Å, ?? is found to be about 900~950mV.

프랑스語의 문화적·언어적 背景

오원교,이명숙 慶北大學校 語學硏究所 1989 語文硏究 Vol.14 No.-

Carbon Black Graft Polymer의 電氣的 特性

李明敎 釜山工業大學校 1981 論文集 Vol.22 No.2

Carbon Black grafted with vinyl monomers or copolymers is called Carbon Black Graft Polymer (C.G) . This can be used as a raw material for stable thick film resistors and sheet heaters as well. Besides, by an appropriate method of preparation under proper conditions it gives resistors with large and stable positive temperature coefficient, which can applied for thermistors and heaters with self temperature control. In this paper, the effects of dimension and thermal conditions such as thermal conductivity, the extend of air convection, resistor-temperature characteristic, and ambient temperature on the voltage-current characteristic of the resistors are discussed.

Graft Graphite에 의한 半導체 素子의 電氣的 特性에 관한 硏究

李明敎 釜山工業大學校 1983 論文集 Vol.24 No.2

A New PTC thermistor which was graft polymerized with graphite, powder of natural crystals, and paraffin and polyethylene of industrial use was made, and then the electrical characteristics was examined. The experimental results were as follows: 1. Prepared samples were fairly good PTC thermistors. The resistivities of the samples increased monotonically as temperature increased between 20℃ and 110℃, and the average value of resistivities at 110℃ was about ?? times of that at 20℃. 2. The mixing ratio of the three materials had an important effect on the resistivity as seen from the resistivity-temperature characteristics, and in viewpoint of the reproducibility of the samples rapid cooling gave a relatively uniform electrical characteristics. 3. The conducting mechanism of the sample could be explalned by Tunneling Effect.

PID 제어기의 최적 설계 방법에 관한 연구

허명준,김창교 순천향대학교 부설 산업기술연구소 1996 순천향 산업기술연구소논문집 Vol.2 No.2

This note deals with a design method for the optimal PID controllers, which has a better practicality than other many existing methods. As an optimal criterion, here the integral of the squared error(ISE) is considered. The optimizing procedure in the proposed method is based on transforming the original form of ISE into the optimizing problem in only parameter space. It is well known that PID control is sufficient for processes where the dominant dynamics are equal to or less than the second order. Thus such three representative plants are applied to this method and some simulation results are given.

HETEROJUNCTION의 最大 太陽에너지 變換效率에 관한 硏究

李明敎 釜山工業大學校 1982 論文集 Vol.23 No.2

A relatively higher generation of carriers in and near the depletion region can be achieved in the case of an abrupt heterojunction than is possible in the case of a homojunction. A theoretical evaluation of the maximum attainable solar conversion efficiencies of p-n and n-p heterodiodes is presented. The calculations are made for some of the theoretically efficient and feasible heterojunctions of Ⅳ and Ⅲ-Ⅴ group semiconductors. The calculated efficiencies are compared wite the reported experimental values and with the conventional ?? photovoltaic cell.

개에서의 膀胱結石 手術3例

김명철,장석진,이교영,김남중,변홍섭,박명호 충남대학교 수의과대학 동물의과학연구소 1995 動物醫科學硏究誌 Vol.3 No.-

Three dogs which show clinical signs of cystic calculi with anorexia, hematuria, stranguria, dribbling of urine, and pain in posterior abdomen, were referred, and diagnosed as cystic calculi by radiography and ultrasonography. Removal of urinary cystic calculi was performed by urinary cystotomy. Calculi, removed surgically, were analyzed chemically and microscolically. Calculi from three patient dogs were calcium carbonate in all. After the removal of calculi recurrence of urolith were not observed up to nowadays for about 4-10 months.

중학교 가정 교과 수행평가 방법 및 도구 개발

박선영,조필교,이양심,윤인경,임양순,최창숙,장명희 한국 가정과 교육 학회 1998 한국가정과교육학회지 Vol.10 No.2

The purpose of the study is to develop a Performance Assessment Method & Tools for Home Economics at middle school. Through the content analyses of middle school Home Economics curriculum and 8 textbooks of lst, 2nd, and 3rd grade respectively, teching elements for each content area were drawn and each specific learning objectives were idntified accordingly. In addition, assessment element for student's performance in each teaching element were specified for analysis. Analytic framework for the development of Performance Assessment Method and Tools were proposed by each teaching element. Beased on the analytic framework proposed, a model method and tools were developed by 10 different test measures of description written test, statement written test, oral test, pro and con discussion, performance test, experiment, interview, observation, self-test report, and portfolio. The model proposed in the study has been modified and improved through the feasibility studies of experts' examination and field research application. The model assessment method and tools for the study has been compleeted finally by proposing 45 performance assessment tools for the content areas of food, clothing, housing, resource management and consumerism, human development and family relationship.

전침 자극에 의한 오디 괄약근 운동성 변화에 관한 연구

이성구,김명완,김홍자,서동환,이상수,김동일,유교상,주연호,민병일,김지훈 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

Background/Aims: This study was designed to evaluated the effects of electroacupuncture on the sphincter of Oddi (SO) motility in humans and to correlate the manometric findings with plasma cholecystokinin (CCK) levels. Methods: Eleven patients (M: F= 5: 6) who had various kinds of biliary disorders were enrolled. SO motility was monitored with a conventional low-compliant continuously perfused technique using ERCP (n=9) or percutaneous transhepatic cholangioscope (n=2). After baseline monitoring for phasic wave contractions of SO, electroacupuncture was applied at a specific acupoint, GB 34, in these 11 patients. A nonspecific acupoint 5 cm away from GB 34 was selected as a control. Manometric parameters of SO were also checked in 6 subjects during stimulation of the control acupoint. CCK plasma levels were measured during the time course of electroacupuncture stimulation. Result: All the manometric parameters including the basal pressure of SO, amplitude, frequency and duration of phasic wave contraction of SO were significantly decreased (p< 0.05) during electroacupuncture stimulation. The inhibition of SO contractility was accompanied by increased CCK plasma levels. After removal of electroacupuncture stimulation, restoration of amplitude and duration to basal condition were noted. A tendency towards the return of SO contractility was also observed in basal pressure and frequency. Stimulation of the control acupoint, however, did not affect the SO contractility and plasma CCK levels. Conclusions: Electroacupuncture stimulation of acupoint GB 34 showed reversible inhibition of SO contraction in humans. We speculate that the response of SO to electroacupuncture stimulation may be mediated by some neurohormonal mechanisms including CCK release. (Korean Journal of Gastrointestinal Motility 2000;6:44-41)

High Performance Liquid Chromatography를 이용한 Hemoglobin A1C 측정

변동원,서교일,유명희,김극배 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.2

Hemoglobin AIc(HbAlc) has been known to be an index of long-term glycemic control (6-8weeks), and offers several practical advantages for screening of diabetes mellitus and evaluation of effects of treatment. Authors introduced to measure and investigate HbAlc levels by high performance liquid chromatoraphy (HPLC ; LDC Milton Roy, USA), with cation exchange column, Mono S HR 5/5 (Pharmacia). The results were as follows; 1. The mean HbAlc level in normal adult control group (n=50) was 4.13±0.25% (Mean±S.D). 2. Within-run precisions of HbAlc levels measured by HPLC were 4.39±0.01% (Mean±S.D.), 1.41(C.V.) in normal control, and 8.95±0.02% (Mean±S.D.), 1.65(C.V.) in intermittently treated diabetic patients, and 11.02±0.01% (Mean±S.D.) 2.93(C.V.) in untreated diabetic patients. 3. Between-run precision of HbAlc levels measured by HPLC were 4.35±0.01% (Mean±S.D.), 2.76(C.V.) in normal control, and 8.98±0.01% (Mean±S.D.), 1.22(C.V.) in intermittently treated diabetic patients, and 10.95±0.15% (Mean±S.D.), 3.51(C.V.) in untreated patients. 4. The peak level of HbAlc was obtained in about 9 minutes and the whole program could be completed within 17 minutes. 5. Blood specimens could be stored for as long as 8 days at 4℃ without changes of HbAlc levels. These results suggest that the measurement of HbAlc by HPLC using cation exchange column is so accurate, simple and rapid that the clinical use is more wider.