TiO₂를 이용한 프로필렌 가스의 광촉매 산화반응

정대일,이동희,김용환,김현숙,이용균,박유미,최순규,김동현 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

Photocatalyzed degradation of propylene gas was carried out over precoated titanium dioxide(anatase) illuminated W light in a flow reactor. photocatalytic oxidation of propylene gas indicated high conversion rates (78.0%) to CO₂ gas. And photocatalytic oxidation of gas according to a fold, twofold, and threefold of titanium dioxide(anatase) respectively gave high conversion rate. The longer reaction time was, the higher conversion rate to CO₂ gas showed.

兒童發聲 指導法 考察

金大絃 서울 敎育大學校 1969 論文集 Vol.2 No.-

CSVT법에 의해 증착시킨 CdS 박막의 전기적 특성

김화민,최제헌,이병로,김태만,윤대현 대구효성가톨릭대학교 자연과학연구소 1991 基礎科學硏究論集 Vol.1991 No.1

CSVT법에 의해 증착시킨 CdS 박막의 전기적 특성 및 열전기 특성을 조사하기 위하여 시료의 X-선 회절, 직류 전기전도도, Hall 이동도 그리고 TSC를 측정하였다. 그 결과 CSVT 법에 의해 제작된 CdS 박막이 보통중착법에 의한 것에 비하여 결정성장이 향상되고 Hall 이동도가 크며 저항이 작다는 것을 알았다. 또한 TSC 측정결과, 광조사 조건에 따라 TSC 피크가 다르게 나타나며 이러한 피크 특성은 photochemical reaction model로서 설명될 수 있고, 그리고 제작조건이 다른 두 CdS 박막에서 나타나는 TSC 피크의 비교로부터 CSVT법에 의해 제작된 시료가 보통증착법에 의한 것보다 상온 이상에서의 photochemical reaction 효과 적음을 알 수 있다. To investigate electrical property and thermally stimulated current (TSC) for the CdS films which were grown by close-spaced vapor transport (CSVT), the measurements of X-ray diffraction pattern (XRD), d.c. conductivity, Hall mobility and TSC were carried out. Form the result of the measurements, CSVT-CdS films are found to be better oriented and to be less resistive with better mobility as compared with the films evaporated by the conventional method. TSC spectra under illumination conditions show different TSC peaks. These can be explained by photochemical reaction model. The result suggests that the effect of photochemical reaction above room temperature is to be less than conventional evaporated films in the case of CSVT-CdS films.

배우의 배역창조에 있어서의 '행동'에 관한 연구(3) : 몸의 연기에 있어서의 양식성

김대현 한국연극교육학회 2003 연극교육연구 Vol.9 No.-

What kind of problems has a actor by the process of the character-building on the stage? If it is true, the theatre is not yet the theatre, before it is observed by the spectator, it is also true, the theatre is not be the theatre without a actor. The actor transforms characters in the text into the living beings on the stage. What means can the actor use by the process of character-building? Stanislayski's 'the System' is accepted as a useful means for the character-building. 'The Method of Physical Action', the last acting method of Stanislayski's System', is also accepted by so many actors and theatre artists. The another acting method, for example Brecht's Gestus theory of acting, made up a deficit of process by character-building. But the actor feels always 'the impression of segregation' on the stages. And this impression of segregation is the one of the biggest problems, which prevent the actor from 'the natural acting'. The purpose of this thesis is a research for the alternative, in which this impression of segregation can be removed by the process of character-building by not only the periods of rehearsal but performances. And it is attempted not in the western but in the eastern theatre. The eastern theatre has several characteristics that is distinguished from the Western. One of the this characteristics is 'attaining of the style or stereotype(archetype) of the character.' It starts the body of the actor, not the emotion or feeling. The word 'Body' means here not the counterpart of soul/mind but the synthetic Beings that synthesizes the soul/mind and body. By the building a character it is especially profitable, if the actor starts it from the outside of the character, that is, the style or stereotype(archetype) of character. There can be no conflict between the soul/mind and body.

웨이블렛 변환을 이용한 정전 탐침 자료 분석 알고리즘 개발

김곤호,김대경,황순모,김용현 한양대학교 이학기술연구소 1999 이학기술연구지 Vol.1 No.-

ECR 식각 플라즈마에서 정전 Langmuir 탐침으로 얻은 자료의 해석을 위하여 Dauberchies 웨이블렛과 이중 직교 웨이블렛 변환을 이용한 새로운 알고리즘을 개발하였다. 이 알고리즘을 이용한 자료해석 방식에서는 해석자의 선택적 입력 값을 최소로 하고 자료의 잡음제거시 일반적으로 사용하고 있는 평균을 기초로 하는 통계적인 방법을 사용하지 않았다. 본 알고리즘에서는 Dauberchies 웨이블렛을 이용하여 자료의 저주파 성분만을 추출함으로 포화 이온 및 전자 전류성분을 변환 자료에서 직접 구하였다. 또한, 원시 자료의 1차 미분자료에 대한 이중 직교 웨이블레서 변환을 이용하여 플라즈마 전위를 직접 구할 수 있어 웨이블렛 변환을 거치는 과정에서 플라즈마 전자온도를 구하는 영역이 일관성 있게 정의되었다. 전자분포 모델은 ECR 플라즈마의 특징인 hot과 bulk의 두 가지 온도를 가지는 bi-Maxwallian 분포로 가정하고 Martquardt 방법을 사용한 비선형 fitting 방법으로 두 가지 전자 온도를 구하였다. 포화 이온 및 전자 전류 곡선의 플라즈마 전위에 해당하는 전류 값으로부터 플라즈마 이온 및 전자 밀도를 얻었으며 임의의 자료에 대한 알고리즘의 정확성 검사 결과 90%이상의 정확도를 보였다. A new algorithm for automating the analysis of Langmuir-probe traces taken from the ECR magnetized plasma is developed through the Daubechies wavelet and the bi-orthogonal wavelet transformations. This approach minimizes the operator-specified inputs and provides de-noised data without using the statistical method based on the averaging techniques. In this algorithm, the electron and ion current lines are obtained from the low frequency information of the Daubechies wavelet processed data. From the bi-orthogonal wavelet transform for the differentiated data, the plasma potential can be clearly determined. The region for obtaining the electron temperature can be systematically chosen from these processed data without operator-specified inputs. The electrons are modeled by a bi-Maxwellian distribution with hot and cold temperatures and nonlienar fitting method (a Martquardt method) is used to determine the electron temperatures from this region. Ion and electron plasma densities are obtained from the ion and the electron current at the plasma potential, respectively. The evaluation results by using the artificially generated data shows over 90% accuracy.

연극연출에 있어서 한 장면의 리듬과 템포에 관한 고찰(2)

김대현 한국연극교육학회 2002 연극교육연구 Vol.7 No.-

This thesis deals especially with the function of the rhythm and tempo by picturization of a scene. Many elements, which consist of a scene, have characteristics of movement, direction, power, level, colour, position and so on. They stimulate and influence by creation of rhythm and tempo. The primary function of rhythm and tempo is to synthesis all elements in a scene and to transform a plain scene into the vivid, vital and real scene. For this purpose a director must be also a commander, choreographer and composer. It can be said that we divide rhythm and tempo into Internal and External. And they have a strong relationship. We can observe the internal rhythm-tempo in a scene itself, colour of setting, costume, the emotional state of characters and so on. And we can also observe the External in the speed of dialogues, movements of characters and in the variations of scene-changes. Of course, there are so many other elements, which effect on the creation of rhythm and tempo in a scene. But what is important is how the director can manipulate these elements and create a scene effectively. In this means, director is the one who has the responsibilities for the creation of rhythm and tempo. The creation of rhythm and tempo is not brought in a scene by chance. Thus a director must think carefully how he can create rhythm and tempo in a scene with these elements.

연극 연출에 있어서 한 장면의 리듬과 템포에 관한 고찰 (1)

김대현 한국연극교육학회 2000 연극교육연구 Vol.5 No.-

It is said the purpose of play direction is the picturization of drama, since the most media of play director are to be seen and to be heard as actors, drama, setting, lights, costumes etc. it may be so important to visualize everything in a drama. But the task of play director is more than a merely picturization. It is related rather with the creation of the rhythm and tempo. Thus the purpose of this thesis is to be certain what the rhythm and tempo in a scene create. Rhythm may be defined as 'the regular recurrence of emphasis or beat' and tempo as 'an impression of speed'. But what we have to be careful is that two words, tempo and speed are not a synonym. The term, tempo refers to an impression of speed and the term, speed is related with actually slowness and fastness. If the task of play director is a creation of the rhythm and tempo, it is nearly the same with a conductor of a musical production. Thus the play director have to score all aspects of a scene. With his sense, every visual and auditory elements are calculated by the means of rhythm and tempo. Especially, pitch, force, rate and quality are considered as the direct factors which are able to create rhythm and tempo in a scene. But this thesis did not handle how the director can create rhythm and tempo in a scene. It will be discussed later.

조리방법에 따른 식품 중 영양소 잔존률(retention factor)에 관한 연구(Ⅰ) : 채소류 및 감자류 Vegetablesn ane potatoes

김대병,장영미,김인복,이혜영,장재희,박정현,엄세정 식품의약품안전청 2000 식품의약품안전청 연보 Vol.4 No.-

조리조건에 따른 식품의 영양소 잔존를을 측정하여 보다 정확한 조리식풍에 의한 영양소 섭취량을 평가할 수 있도록 하기 위하여 합리적인 영양소섭취량 조사, 영양 평가를 위한 개선책을 제시하고자 끓였다. 대상 시료와 조리법은 시금치(데치기, 끓이기), 배추(끓이기), 콩나물(데치기, 끓이기), 호박(끓이기, 볶기). 당근(끓이기, 볶기), 우엉(조림), 감자(끓이기, 볶기)이었으며, 조리 전 후의 비타민 A(β -carotene), Bl, B2, C, E, 나이아신, 칼슘, 철, 아연, 칼륨, 인, 나트륨의 함량을 분석하여 조리법에 따른 잔즌률을 국하였다. 조리조건별 잔존률을 구한 결과 무기질은 데치기의 경우 조리수를 제거하므로 손실이 있었으나 끓이기, 볶기 등의 조리법에서는 손실이 거의 없었다. 비타민 A와 I는 대부분 80%이상으로 많이 손실되지 않았으며 비타민 Bi은 데치기가 가장 낮았고, 조림, 괄이기, 볶기의 순으로 잔존률이 높았다. 비타민 B2와 나이아신은 비타민 Bi보다는 잔존를이 높은 경향이었다. 비타민 C는 대부 분의 조리법에서 크페 손실되었다. 본 연구의 결과는 합리적이고 정확한 영양소 섭취량 평가를 위한 기초자료로서 기존의 평가방법을 개선 보완하여 영양소섭취량 평가으 과학화에 기여할 것으로 기대된다. In various mutrition activities, the necessary values of nutrient intake were usually calculated from food composition tables which have nutrient contents of raw ingredients and dishes, but Korean food composition tables of dishes were lacking, So we studied todetermine the nutnent retention factors(RF) of vegetables and potatoes by cooking methods. Atfirst, we surveyed cooking methods of vegetables and potatoes, and selected major vegetablesand cooking methods. Selected items and cooking methods were sp.mach(blanching and boiling),cRnese cabbage(boiling), soybean sprout(bBanchlng and boiling), pumpkin(boiling andstir-frying), carlot(boiling and stir-frying), burdock(braising), and potato(boiling and stir-frying)We analyzed 6 vitamins luhich were vitamin A(β-carotene), Bl, B2, C, E, and niacin, and 6minerals which were calciurrl, iron, zinc, potassium, phosphorus, and sodium. The results wereas follows : Minerals almost retained in boiling, stir-frying, except in blanching method, RF ofvitamin A and I were 80% or more. RF of vitandn Bl were decreased in order of sfir-frying,boiling, braising, blanching and the RF of vitamin B2 and niacin were higher than vitandn Bl,RF of the vitamin C were varird in So~90% in all cooking methods

GeS, GeSe 결정성장과 특성에 관한 연구

이현순,한부길,김대중 圓光大學校 1996 論文集 Vol.31 No.2

GeS 결정은 승화법에 의해 성장시키고 GeSe 결정은 vapour transport 방법을 이용하여 성장시켰다. GeS와 GeSe 결정은 orthorhombic 구조를 가지고 있다. 297K에서 optical energy gap은 1.64eV(GeS), 1.51eV(GeSe)이고, GeS의 광전도도는 764nm에서 peak가 나타난다. GeSe의 전기적 특성을 알아보기 위하여 van der Pauw 방법을 사용하여 Hall 효과를 측정했다. Crystals of GeS were obtained by sublimation of GeS chunks between 520℃ and 580℃ in closed evacuated (10?? torr) quartz ampoule using a vertical pulling method, and GeSe crystals were grown in an ampoule by vapour transport method. Both GeS and GeSe crystals had the orthorhombic structures and the lattice constants were measured to be ??, ?? and ?? (GeS); ??, ??, ?? (GeSe), respectively. At the temperature of 297K the optical energy gaps were 1.64eV (GeS), 1.51eV (GeSe), respectively. The photocurrent spectra of GeS measured at room temperature show a peak at 764nm. In order to investigate the temperature dependence of the electrical characteristies of GeSe crystals, the Hall effect was measured by using van der Pauw method.

관상정맥동과의 연결이 없는 좌상대정맥의 CT 소견 : 1예 보고 case report

백상현,박재성,이혜경,홍현숙,김대호,조준희,박성진,차장규 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

A persistent left superior vena cava (PLSVC) is the most common thoracic venous anomaly. It is a persistent remnant of a vessel that is present as a counterpart of normal right-sided superior vena cava(SVC) in early embryological development but normally disappears later. Its diagnosis can be confirmed by many noninvasive and invasive tests, or it is incidentally diagnosed at insertion into the left subclavian or jugular vein or thoracic surgery. If it is not associated with other congenital cardiac anomalies, it is usually asymptomatic and hemodynamically insignificant. We describe the chest radiograph and CT findings of bilateral SVC with drainage to left superior intercostal vein, hemiazygos, azygos vein and right SVC, and no connection of coronary sinus.