• 한국농공학회지
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• 제29권4호
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• pp.59-72
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• 1987

Although long-term runoff analysis is important as much as flood analysis in the design of water works, the technological level of the former is relatively lower than that of the latter. In this respect, the precise estimation model for the volume of successive runoff should he developed as soon as possible. Up to now, in Korea, Gajiyama's formula has been widely used in long-term runoff analysis, which has many problems in applying in real situation. On the other hand, in flood analysis, unit hydrograph method has been exclusively used. Therefore, this study aims at trying to apply unit hydrograph method in long-term runoff analysis for the betterment of its estimation. Four test catchment areas were selected ; Maesan area in Namlum river as a representative area of Han river system, Cheongju area in Musim river as one of Geum river system, Hwasun area in Hwasun river as one of Yongsan river system, and Supyung area in Geum river as one of Nakdong river system. In the analysis of unit hydrograph, seperation of effective rainfall was carried out firstly. Considering that effective rainfall and moisture condition of catchrnent area are inside and outside of a phenomenon respectively and the latter is not considered in the analysis, Initial base flow(qb)was selected as an index of moisture condition. At the same time, basic equation(Eq.7) was established, in which qb can take a role as a parameter in relating between cumulative rainfall(P) and cumulative loss of rainfall(Ld). Based on the above equation, computer program for estimation model of qbwas seperately developed according to the range of qb, Developed model was applied to measured hydrographs and hyetographs for total 10 years in 4 test areas and effective rainfall was estimated. Estimation precision of model was checked as shown in Tab- 6 and Fig.8. In the next stage, based on the estimated effective rainfall(R) and runoff(Qd), a runoff distribution ratio was calculated for each teat area using by computerised least square method and used in making unit hydrographs in each test area. Significance of induced hydrographs was tested by checking the relative errors between estimated and measured runoff volume(Tab-9, 10). According to the results, runoff estimation error by unit hydrograph itself was merely 2 or 3 %, but other 2 or 3 % of error proved to be transferred error in the seperation of effective rainfall. In this study, special attentioning point is that, in spite of different river systems and forest conditions of test areas, standardized unit hydrographs for them have very similar curve shape, which can be explained by having similar catchinent characteristics such as stream length, catchinent area, slope, and vegetation intensity. That fact should be treated as important factor ingeneralization of unit hydrograph method.

• 한국환경과학회지
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• 제2권1호
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• pp.61-72
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• 1993

[에멀존]계에서 거대고리화합물에 의한 효과적인 수송현상을 두가지 관점에서 논의하였다. 하나는 중금속이온($Cd^{2+}$. $Pb^{2+}$ 및 $Hg^{2+}$)을 토루엔막으로 추출하는 경우.만일 금속=거대고리 화합물의 상로작용이 크다면 이 추출효과는 증가한다. 주번째 토루엔-경꼐면에서, 금속이온을 정량적으로 용리시키기 위해서는 금속이온 -Re-cieving Phase와 금속이온-거대고리화합물 사이의 상호작용에 대한 LogK의 사가 충분히 커야한다 첫번째는 거대고리 화합물의 주개원자, 치환제, 그리고 공동반경을 고려함으로써 해결된다. 이 연구의 결과들은 이론과 잘 일치하며, 시료용액의 종류는 에멀존망에 의한 금속이온의 수송현상에 영향을 준다.$SCN^-$,$1^-$ 및 $Br^-$이온과 같은 $A^-$이온을 사용할 경구, 수송순서는 $A^-$ 이온의 용매화순서의 크기에 일치하며, 용해도의 차이때문에 금속이온의 소송능력은 Receiving Phase의 화학종 농도의 크기에 영향을 받는다. 이 연구에서는 적당한 실험조건하에서 조절된 토루엔막을 사용함으로써 $Cd^{2+}$, $Pb^{2+}$, 및 $Hg^{2+}$ 이온의 혼합물로부터 각각의 단일이온들을 효과적으로 분리농축할 수 있었다. 그리고 $Cu^{2+}$,$Ni^{2+}$,$Zn^{2+}$,$Fe^{2+}$, 이온들은 중금속이온들을 분히 농축하는데 부분적으로 방해를 하였다. 그러나 알칼리 및 알칼토금속이온은 방해하지 않았다.

• 대한수의학회지
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• 제31권2호
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• pp.223-228
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• 1991

Most progesterone enzyme immunoassays(EIA) are used liquid-phase double-antibody or single-antibody seperation. These methods consume considerable time and reagents because of the requirements for several washing and centrifugation steps involving the reactants. Because of these several problems, we were prompted to develop an effective enzyme-linked immunosorbent assay(ELISA) system that would be equal or superior to RIA for assay of progesterone. The results were obtained as follows. 1. Cross reaction of the progesterone antiserum with other steroids determined was shown with progesterone(100%), $11{\alpha}$-deoxycorti-costerone(2.271%), but the other steroids were shown below 0.9%. 2. Standard curve for progesterone ELISA was shown available difference according to progesterone concentration from 0 to 1,000pg/ml. 3. The lower limit of sensitivity was 0.2pg/well 4. Progesterone concentration was 1.6ng/ml for before parturition, and that was below 0.5ng/ml for after parturition. This development enzyme-linked immunosorbent assay for progesterone can be detected pregnancy diagnosis in cattle, and also applicable 10 research on physiological function including such as reproductive disorders.

• 대한가정학회지
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• 제46권7호
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• pp.71-84
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• 2008

The purpose of this study is to analyse how the separation anxiety of mothers and children influences on the children's peer competence through mother's overprotection. The subjects of this study were 302 children and their mothers, three to five years old who attended at educare centers and kindergartens which were located in Cheongju city and Daejeon city. The results of this research were as follows: First, there were differences in the separation anxiety of mothers and children, maternal overprotective behavior, and children's peer competence according to the social demographic backgrounds. Second, the separation anxiety of mothers and children influenced on mother's sheltering behavior and babying behavior. Third, mothers' sheltering behavior mediated the relationship between mothers' and children's separation anxiety and children's prosocial behavior. It also appeared that mothers' babying behavior mediated the relationship between the separation anxiety of mothers and children and children's initiative.

• 물과 미래
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• 제9권2호
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• pp.76-86
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• 1976

The 30-year design flood hydrograph for the Musim Representative Basin, one of the study basins of the International Hydrological Program, is synthesized by the method of unit hydrograph. The theory of unit hydrograph has been well known for a long time. However, the synthesis of flood hydrograph by this method for a basin with insufficient hydrologic data is not an easy task and hence, assumptions and engineering judgement must be exercized. In this paper, the problems often encountered in applying the unit hydrograph method are exposed and solved in detail based on the theory and rational judgement. The probability rainfall for Cheonju Station is transposed to the Musim Basin since it has not been analyzed due to short period of rainfall record. The duration of design rainfall was estimated based on the time of concentration for the watershed. The effective rainfall was determined from the design rainfall using the SCS method which is commonly used for a small basin. The spatial distribution of significant storms was expressed as a dimensionless rainfall mass curve and hence, it was possible to determine the hyetograph of effective design storm. To synthesize the direct runoff hydrograph the 15-min. unit hydrograph was derived by the S-Curve method from the 1-hr unit hydrograph which was obtained from the observed rainfall and runoff data, and then it was applied to the design hyetograph. The exsisting maximum groundwater depletion curve was derived by the base flow seperation. Hence, the design flood hydrograph was obtained by superimposing the groundwater depletion curve to the computed direct runoff hydrograph resulting from the design storm.

• 한국식생활문화학회지
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• 제17권1호
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• pp.90-95
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• 2002

This study was conducted to determine the desirable thawing method and storage time of Nokchaborijook(gruel made of barley, rice powder and Green tea) which made of optimum conditions as the 5.8% Green tea and 15 seconds grinding time. Decision on desirable storage time(10, 20, 30, 40, 50days), thawing method(water bath, microwave oven) of frozen Nokchaborijook were determined by sensory evaluation and physicochemical attributes. As the storage time became longer, moisture and flavonoid contents were decreased. Viscosity, the ratio of water seperation, spreadability of Nokchaborijook which stored at 30 days showed great differences between the two thawing method. Among the sensory characteristics, desirability for overall, flavor, and texture were decreased as the storage time became longer. As a result of consumer test, Nokchaborijook thawed at water bath was more desirable than Nokchaborijook thawed at microwave oven. According to the results, frozen Nokchaborijook can be using as a supplement of dietary fiber and flavonoid for the health and be using convenience food.

• 한국측량학회지
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• 제15권1호
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• pp.41-50
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• 1997

본 연구에서는 실시간에 걸쳐서, 자동적으로 공액점들을 매칭시킬 수 있는 색상분리기법을 제시하는데 목적을 두고 있다 CCD카메라에의해 취득된 영상으로부터 계산된 상좌표는 취득된 상좌표의 정확도 와 소트를 통한 매칭의 정확도 측면에서 점검되었다. 점검결과, 연구에의하여 취득된 상좌표를 이용하여 사진측량 프로그램에 의해 계산된 대상물좌표의 RMSE는 근거리사진측량의 기대RMSE내에 분포하고 있었으며, 소트에의한 공액표정점들의 매칭 또한 정확하게 수행되었다. 따라서 본 연구에서 제시하는 색상분리기법이 정확한 상좌표의 취득과 공액점의 매칭에 적절함을 알 수 있었으며, 이 방법은 실시간에 걸쳐서 취득정보를 빠르고 정확하게 처리해야하는 산업분야에 유용할 것으로 생각된다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.966-978
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• 1993

A power operated 90.5 hp electric motor) grain flour separator was designed and developed for separation of grain (wheat, corn, chickpea and soybean) flour into various fractions based on the size of the particles of the product. The separator agitating mechanism, feed control, cylindrical separator unit and an eccentric mechanism. The machine was tested for wheat ( variety ; Sujata) flour separation into four fractions, viz ; semolina, Gr-I and II, flour (coarse) and white (fine) flour. Wheat samples (6.8% m.c., db) were first pearled by CIAE pearler for 15.8% bran removal . The pearled wheat grains were then milled for semolina by a burre mill. The product and machine characteristics were determined at different capacities varying from 24 kg/h to 143 kg/h. It was found that 76 kg/h capacity gave reasonably best results in terms of purity and recovery of semolina vis-a-vis the market product. The energy requirement of the machine at no-load was found to be 230 W and at load c nditions, it varied between 36.3-6.4 KJ per kg of fead seperation. The macine could be used by small flour millers small/medium size traders and retailers and other processors for making available various flour products of different particle size in the market for ready use of the consumers.

• 약학회지
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• 제13권1호
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• pp.1-15
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• 1969

A new method of qualitative and quantitative determination of barbiturates in the pharmaceuticals by means of $\alpha$-picoline-copper (II) was studied. Barbiturates in the pharmaceuticals were dissolved in the mixed solvent of 33% $\alpha$-picoline-Carbontetrachloride to yield Complex Compounds of barbiturates-copper (II)-$\alpha$-picoline. Complex Compounds of barbiturates show uniformly maximum absorption at the wavelength of 540m.mu. and wre to be identified at the concentration of 1 X 10$^{-4}$ Mole, and also was to be quantitatively determined at the concentration of 1 X 10$^{-3}$ Mole. By this method barbiturates in the pharmaceuticals could be determined in the presence of various compounds such as sulpyrine, isopropylantipyrine, antipyrine, phenacetin and etc. But Barbiturates could be also determined by this method after seperation with aminopyrine, acetaminophen, acetylsalicylic acid and etc. by column chromatography. And barbiturates and acetylsalicylic acid could be also determined by simultaneous equation while their complex compounds show uniformly each maximum absorption at the Wavelength of 540 m${\mu}$ and 620 m${\mu}$. I.R. spectra of these complex compounds show identification of Barbiturates derivatives. The composition ratio of these complex compounds were : barbiturates : Cu : ${\alpha}$-picoline=2:1:2.

• 한국약용작물학회지
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• 제13권4호
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• pp.146-149
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• 2005

국내에서 재배되고 있는 뽕나무의 resveratrol 및 oxyresveratrol 함유량을 측정한 결과 부위로는 뿌리껍질, 품종으로는 신일 및 수원품종이 가장 많은 resveratrol 및 oxyresveratrol를 함유하는 것으로 나타났다. 따라서 뽕나무로부터 resveratrol 및 oxyresveratrol을 유효성분으로 얻고자 할 때는 신일 및 수원품종의 근피를 사용하는 것이 가장 효과적일 것으로 판단된다.