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금강하구호에서 배수갑문 폐쇄 후 수질변화와 염소이온농도의 예측
임봉수,김태응,방미란,유갑봉 大田大學校 環境問題硏究所 1998 환경문제연구소 논문집 Vol.3 No.-
This study was carried out to forecast the chloride concentration and to investigate the water quality for industrial water supply after closing the sluice gate in Keum river estuary reservoir. Chloride concentration was dilluted by input flow, depended on outside chlorine mass than inside mass form reservoir body. The forecasting equation for chloride concentration is got Ci=3700·e ?? + 405/ ?? +2.5 without considering input chloride concentration from upstream river. The water quality in intake station for industrial water supply was satisfied for the standard for industrial water supply, but requried the physico-chemical treatment owing to maximum values of turbidity, pH, TS, Fe, Mn were exceed the standard.
김갑순,신의균,김우범,정수영 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1
A finite element analysis and experimental study were performed to investigate the behavior and strength of a connection of tubular steel member considering slenderness ratio and eccentricity. Primary interest here are ultimate strength of connections having eccentricity. In comparison with the current design standard according to which the gravity axes of the main and branch pipes coincide with each other, the inner eccentric joint where the gravity axes of the branch pipes are shifted to the gusset plate side can reduce the gusset plate size. However, in the eccentric joint where the gravity axes do not coincide, the bending moment that acts on the main pipe due to eccentricity causes a problem. As a result, in cases where the slenderness ratio is 40 or less, the buckling strength of the inner eccentric joint was similar to that of a joint without eccentricity. Therefore the possibility of use of inner eccentricity connection to reduce the gusset plate size has been verified.
송갑득,박영일,이상문,이윤수,최낙진,주병수,서무교,허증수,이덕동 한국센서학회 2002 센서학회지 Vol.11 No.6
센서의 안정도와 감도를 개선시킬 수 있는 단일전극을 가진 열선형 마이크로 가스센서를 제작하였다. 일반적으로, 금속산화물 반도체를 이용한 가스센서는 히터전극과 감지전극의 두 개의 전극을 가지고 있다. 제작된 센서는 히터전극위에 감지물질을 형성하여 단일 전극을 가지는 구조를 가지고 있다. 히터와 감지전극으로 사용되는 Pt는 glass 기판위에 스퍼터링법으로 형성하였으며, SnO_2 감지물질은 제작된 Pt 전극위에 열증착시켜 형성하였다. SnO_2막은 lift-off 공정을 이용해서 패턴을 형성하고 1시간 동안 산소분위기에서 열산화하였다. 제작된 소자의 크기는 1.92x.1 mm^2 이다. CO 가스에 대한 감지특성을 조사한 결과 1,000 ppm에 대해 100 mV의 출력변화를 나타내었으며, 넓은 농도범위(0 ~ 10,000 ppm에서 선형적인 전압출력을 나타내었다. 또한 가스 반응 전과 반응 후의 전압출력을 비교해 볼 때, 1 % 이내의 편차를 나타내는 우수한 회복성을 나타내었다. Micro gas sensor with single electrode was proposed for improving stability and sensitivity, Generally, metal oxide gas sensors have two electrodes for heating and sensing. This fabricated new type sensor have only a single electrode by forming a sensing material onto heating electrode. Pt as a heating and sensing electrode was sputtered on glass and a SnO_2 sensing material was thermally evaporated on Pt electrode. SnO_2 was patterned by lift-off process and then thermally oxidized in O_2 condition for 1 hr., 600 ℃. The size fabricated sensor was 1.9 x 2.1 mm^2. As a result of CO gas sensing characteristics, this sensor showed 100 mV change for 1,000 ppm and linearlity for wide range(0 ~ 10,000 ppm) of gas concentrations. And the sensor shows a good recovery characteristics of 1 % deviation compared to initial resistance.
유사성을 기반으로 한 C++ 클래스 평가, 분류 및 검색 방법
김갑수 서경대학교 1995 論文集 Vol.23 No.2
본 연구에서는 C++ 언어로 된 클래스들을 평가하고, 분류하여 기존 클래스 구조에 등록하고, 검색하는 방법을 제안한다. 클래스 평가 방법은 클래스들을 이해하는 척도를 이용한다. 클래스 분류 방법은 문서를 클러스터링하는 데 이용되는 유사성 계산식의 확장이다. 두 클래스들 간의 유사성은 멤버 데이터 유사성 과 멤버 함수 유사성에 의해서 결정된다. 클래스들 간의 유사성 값에 따라 클래스의 계층 구조가 구성되며, 새로운 클래스를 삽입하는 경우에는 가장 유사성이 큰 클래스와 클러스터링이 일어난다. 이 분류 방법은 여러 개의 독립적인 클래스 구조를 하나의 구조로 통합하는 기능을 제공한다. 클래스의 검색 방법은 키워드를 입력하는 방법을 채택하고 있고, 사용자가 검색하는 것을 도와주기 위하여 snapshot이 있다. 본 연구의 장점은 기존의 분류 방법들이 지원하지 못하는 클래스의 계층 구조와 확장성을 효과적으로 지원하기 때문에 클래스 계층 구조를 효과적으로 변형할 수 있다. In this paper, we suggest a method for evaluating C++ classes, classifying them in order to register them into the class structures, and retrieving them. C++ classes by using class complexity is evaluated. A method for classifying classes is a model of extending a method of similarity-based classification which has been used in clustering text documents. The similarity between two classes is determined by the member data similarity and the member function similarity. A hierarchy of classes is constructed based on the class similarity, and a new class can be inserted to the hierarchy by comparing the similarity between the new class and the existing classes. A method for retrieving classes by keyword is suggested, and the snapshot which help users to retrieve classes is suggested. According as the method provides a mechanism of structuring classes based on their inheritance relations and the extensibility of the class structure, which have been not supported by the current approaches, we can adapt the class hierarchy structure efficiently.
Lipase를 이용한 (S)-3-acetoxy-2-methylpropanol의 제조
서영배,서연찬,이갑득 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2
Captopril, α-tocopherol, erythromycin A, muscone과 같은 의약품, 향료등 생리활성물질의 합성에 있어서 유용한 중간원료로 이용되는 광학활성인 D-(-)-β-hydroxyisobutyric acid를 제조하기 위하여 그 전구체로 (S)-3-acyloxy-2-methylpropanol을 선정하여 lipase의 부제가수분해반응을 이용하여 이의 개발을 시도하였다. 대칭성 기질 2-methyl-1,3-propanediol diacetate 2를 다양한 lipase를 사용하여 부제가수분해(asymmetric hydrolysis)시킨 결과 lipase PS(Amano 제약, Pseudomonas sp.)의 경우는 phosphate buffer pH 7.0 조건하에서 광학순도(optical purity) 95% e.e.의 (R)-(-)-3-acetoxy-2-methylpropanol을 80% 수율로 생산하였으며, lipase AY(Candida rugosa)의 경우는 phosphate buffer pH 6.5/isobutyl alcohol (1/1), O℃의 조건하에서 목적으로 한 (S)-3-acetoxy-2-methylpropanol 3을 광학순도 약 60% e.e.로 생산하였다. Optically active carboxylic acid, D-(-)-β-hydroxyisobutyric acid {(D)-(-)-HIBA} is a useful chiral starting material for the preparation of enantiomerically pure bioactive compounds which have a chiral methyl carbon center in the molecule such as captopril, α-tocopherol, erythromycin A, muscone and so on. (S)-3-Acetoxy-2-mthylpropanol can be used as the precursor of (D)-(-)-HIBA, that is, chemical oxidation of the hydroxyl group and subsequent hydrolysis of acyl group in (S)-3-acetoxy-2-methylpropanol affords D-(-)-β-hydroxyisobutyric acid. (S)-3-acetoxy-2-methylpropanol was prepared by lipase-catalyzed asymmetric hydrolysis. In the enzymatic hydrolysis system, lipase AY (Candida rugosa) provided the expected (S)-3-acetoxy-2-methylpropanol in 60% e.e. of the enantiomeric purity under the phosphate buffer and organic co-solvent system.
CROSS 공법을 이용한 폐수의 생물학적 처리에 관한 연구
박광하,심재도,권영두,강동수,김인호,정태명,황갑성 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-
This study aims to develop using a continuous removal of organic and settling solid(CROSS) to increase the efficiency of aeration system for wastewater treatment. To solve many problems of the conventional activated-sludge process, authors suggested a new CROSS model in conjunction with aeration systems in 1996. This system is characterized by utilizing an intensive aeration pipe with inlets at the lower portion and outlets at the higher portion in an aeration tank. Through the experiments on CROSS process, the average removal efficiences of BOD, COD_(Mn), SS, T-N and T-P were showed 98.8%, 93.9%, 98.0%, 71.3% and 49.8%. The average DO (Dissolved-Oxygen) concentration was constantly maintained at 8.0 mg/L by the intensive aeration which was accompanied by rapid reduction of BOD. Degradation of the organic matters in sewage then continued for the whole aeration period. The process demonstrated that it was very adaptive without seeding and returning the sludge. Compared to the activated sludge system, the system was very flexible for the continuous flow treatment. This preliminary assessment showed that the porous media in CROSS reactor is viable for the sewage treatment, since the porous media under the intensive aeration achieves acceptable effluent quality.
Anodonta woodiana hukudai MODELL의 生活史에 關한 硏究
崔信錫,吳炅煥,崔申洙 충남대학교 자연과학연구소 1980 學術硏究誌 Vol.7 No.1
The life cycle of fresh water bivalve, Anodonta woodiana hukudaz, was investigated at the tributary of the Dongjin River, Buan-Kun, Chunlabuk-Do from September 1978 to August 1979. 1. A woodiana hukudai was one of the summer breeders, whose breeding phenomenon was observed from February to August, 1979. The highest rate of Its breeding was observed in June. 2. Fish species infected with glochidia of A. woodiana hukudai were Oryzias latipes, Carassius carassius, Morco oxycephalus, Pseudoperilampus uyekii, and Zacco platypus. The most common species infected with glochidia was O. latipes. 3. The highest rate of infection with glochidia was observed on O. latipes from June 5 to June 20, 1979. Its infection rate was 20.4- 32.1 %. 4. Most glochidia of A. woodiana hukudai were found on the pectoral 2nd caudal fin of O.latipes. The average number of glochidia was 3.1 per fish
유기용제 취급근로자들의 요중대사물질과 말초임파구 자매염색분체교환 발현빈도에 관한 조사연구
김돈균,황인경,류철인,이수일,정갑열,이용환,이충렬,현원일,김석봉,전용덕 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1
저자들은 유기용제 취급여성근로자 90명을 대상으로 1988년 7월부터 1989년 8월까지 말초혈액임파구에서의 자매염색분체교환의 발현빈도를 조사하고 이들의 업종, 근속연수, 요중마뇨산 농도등이 자매염색분체교환의 발현빈도에 미치는 영향을 조사하였으며 그 결과를 요약하면 다음과 같다. 1. 유기용제 취급근로자들의 말초혈액임파구에서의 자매염색분체교환의 발현빈도는 대조군에 비하여 유의하게 증가되었다. 2. 말초혈액임파구에서의 자매염색분체교환의 발현빈도가 가장 높은 업종은 프라스틱제품 제조업이었다. 3. 근속연수가 말초혈액임파구에서의 자매염색분체교환의 발현빈도에 미치는 영향은 현저하지 않았다. 4. 요중마뇨산농도와 말초혈액임파구에서의 자매염색분체교환의 발현빈도간에는 유의한 상관관계가 있었다. In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaluate the effect of organic solvents on the health in industrial workers, the authors studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocytes from 90 female workers expoxed to organic solvents and 20 non-exposed female workers. The results obtained were as follows : 1. The frequency of sister chromatid exchanges in peripheral lymphocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 control subject. 2. The frequency of sister chromatid exchanges was significantly increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chromatid exchanges by carriers of the exposed workers.
정보영재아를 위한 개념 클립(CLIP)을 기반 프로그래밍 교육방법 연구
김갑수 ( Kap Su Kim ) 서울敎育大學校 初等敎育硏究所 2013 한국초등교육 Vol.24 No.1
수학과 과학분야의 영재아들을 위한 교육 방법은 많이 존재하지만 정보 분야의 영재아들을 위한 프로그램이나 알고리즘 교육 방법이 거의 없다. 따라서 본 연구에서는 정보 영재아들의 창의성과 탐구 능력을 향상하고, 문제 해결력을 배양하기 위하여 프로그래밍 교육 방법을 개념 클립(CLIP-Creativity, Leadership, Inquiry, Problem solving) 교육 방법에 적용하는 방법을 제안한다. 프로그래밍 교육 방법에는 문제 이해 단계, 설계 단계, 구현 단계, 시험 단계, 확장 단계로 구성된다. 각 단계에는 프로그래밍 교육 전략인 입출력 원리, 효율성 원리, 일반화 원리, 단순화 원리, 추상화의 원리를 적용한다. 또한, 각 단계별로 개념 습득 전략, 창의성 향상전략, 탐구기능 향상전략, 리더십 향상 전략을 적용하는 방법을 제안한다. 본 연구에서 제안한 프로그래밍 교육 방법을 실제 탐색 문제에 적용하였다. There are many gifted education method for gifted children in the Mathematics and science field. But, there is a few of gifted program or algorithm education method for gifted students in the field of infonnation. In this study, to improve the creativity and the ability to explore the information and the problem solving power of gifted children, programming education method which is based on concept clip (CLIP-Creativity, Leadership, Inquiry, Problem solving) model is proposed. The process of programming method is the problem understanding phase, design phase, implementation phase, test phase, and challenging step. All phases of programming process are applied to programming education strategies that are input and output principles, elficiency principles, generalization principles, simplification principles, and abstraction principles. Also, Concept acquisition strategies, creativity improvement strategies, explore enhancement strategy, leadership development strategies are applied the all phase of proposed programming method. Programming education method proposed in this study was applied to the searching algorithm.