프리스트레스트 콘크리트 橋梁의 解析 및 設計自動化

金亮均,李準熙,崔正鎬,申鉉穆 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2

Computer programs called "PCBRG" and "PCPST' were developed to analyze and design the prestressed concrete bridge. PCBRG is a structural analysis program which can determine the member forces, displacements and adaptable area of tendon by iteration method. PCPST is a post-processor for design. It enables design variables verified and the results of analysis (stress, member force and displacement, etc) are presented in the screen. Also the shear force and bending strength by the deformation compatibility method were checked.

사이클 모사 프로그램을 이용한 대체냉매 냉동공조 시스템의 열역학적 해석

박량한,김영재 한국공업화학회 2004 응용화학 Vol.8 No.2

The system air-conditioner, which has one outdoor unit connecting several indoor unit units, can provide more energy saving and better environmental conditions than the conventional air-conditioning systems. But it is difficult to experimentally analyze behaviors of system air-conditioners due to various load conditions and combinations of indoor units. Therefore, it is important to develop a cycle simulation program for predicting the performance of system air-conditioners without complex experiments. The cycle simulation program for system air-conditioners consists of several subroutines for simulating indoor unit, outdoor unit, compressor, and expansion devices, and for estimating the thermodynamic and transport properties of the refrigerants and moist air. It was programmed with Digital Visual Fortran for the main simulation code and Visual Basic for the graphic user interface.

麥作에 있어서 Isoproturon의 殺草特性과 藥害 및 收量에 미치는 影響

梁瑢承(Ryang, Y. S),金鍾奭(J. S. Kim),韓性洙(S. S. Han),梁桓承(H. S. Ryang) 韓國雜草學會 1982 Weed&Turfgrass Science Vol.2 No.2

전이지대 방언의 변이 양상 고찰 -서남방언과 동남방언의 접경지를 중심으로-

위평량 ( Wi Pyeong-ryang ) 한국방언학회 2021 방언학 Vol.- No.33

본고에서는 서남방언과 동남방언의 접경지에 분포하는 변이형들을 접촉과 변이의 정도를 따라서 3가지 형태로 분류하여 정리하여 보았다. 1) 단어, 음절 단위의 차용과 변이(병렬, 혼효), 2) 음소 단위의 차용과 변이(자음, 모음 차용), 3) 제3유형으로의 변이 가능성을 살펴볼 것이다. 이 중 제3유형의 변이형들은 방언의 접촉과정에서 나타날 수 있는 ‘아래아(ㆍ) 변화의 방향’, ‘자음의 충돌과 변화’ 등에 대한 새로운 시각을 제시해 줄 수 있을 것이다. 그리고 만약 이러한 결과가 접촉의 과정에서 나타나는 변이의 모습으로 타당성을 가질 수 있다면 다른 방언 접경지의 수많은 변이형들을 재조명해 볼 수 있을 것이며, 다양한 환경에서 나타나는 국어의 음운변화 과정도 예측해 볼 수 있지 않을까 생각한다. I tried to find(prove) that any variation, which takes place when one dialect comes in contact with the other, does not take forms randomly but to any extent with direction and rules in Wi Pyeong-ryang(2005). And so I will confirm again that any variation keeps the head of the base of the former word and permits the tail of the other word depending upon the extent(degree) of each other’s influence through the distribution of ‘galkwi’(‘fork’) word forms. However, the causes of any variation are so varied and difficult to predict that any variation is varied and complex. It is difficult to conclude whether this aspect is the result of the contact of two dialects or the area’s particular aspects of the language of the area in question. This work will investigate(study) a lot of variations of the border lines of Jeallado and Gyongsangdo. These areas show the difference of west-southern dialect and east-southern dialect. The types of variation of these areas are 1) borrowing and variation of a word or a syllable 2) borrowing and variation of a phoneme (consonant, vowel borrowing) 3) the possibility of variation to the third type. I don’t jump to a conclusion that the new types, which are assumed to be the variations of the third type, resulted from the contact of the dialects. I will analyze these types based on the viewpoint of contact dialects. I will consider the possibility that we will predict the process of Korean phonologic changes if these changes are from the process of contact. Though this viewpoint is farfetched, I give(show) you(the readers) the chance of scrutinizing the reality of the variation of the contact areas.

Photoaddition Reaction of Biacetyl

RYANG, Hong-Son 朝鮮奬學會 1973 學術論文集 Vol.3 No.-

The photochemical reaction of biacetyl with various olefins has been investigated. Irradiations of biacetyl with indene, furan, and ethyl vinyl ether give oxetanes with higher orientational selectivity than that of monoketones. In the case of methyl-substituted olefins, it is found that novel prnducts, 2-acetoethyl allyl ethers, accompany the oxetanes and are formed in good yield. The ratios of these products vary with the olefins used. The presence of biradical intermediates formed by addition of excited biacetyl to olefins is established by deuterium-labeling experiments. The quenching of biacetyl phosphorescence by an olefin indicates that the n-π* triplet state of biacetyl is involved in these reactions. The absence of adduct in the case of electron-deficient olefins indicates that the excited biacetyl is electrophilic in its reaction with olefins. The mechanism of these reactions is best described as an electrophilic attack of the n-π* triplet state of biacetyl to the olefins to give a biradical intermediate which undergoes competitive cyclization and disproportionation. The difference in the reactivity of biacetyl toward photoaddition relative to monoketones and o-quinoues is discussed.

Detection of Serum IgA and IgE Antibodies in Experimental Animals Infected with Echinostoma hortense

Ryang, Yong-Suk,Kim, Insik,Lee, Kyu-Jae,Lee, Ji-Sook 대한의생명과학회 2000 Journal of biomedical laboratory sciences Vol.6 No.2

호르텐스극구흡층 피낭유충을 흰쥐 및 마우스에 경구 감염시킨 후 실험동물의 혈청 및 장액에 대한 IgA 및 IgE 항체가 변화 추이를 ELISA방법으로 비교 분석하였다. 감염 흰쥐에서 형청의 경우 IgA 및 IgE 항체가를 대조군과 비교해 볼 때 유의한 차이를 나타내지 않았다. 그러나 장액의 IgA 항체가는 감염 후부터 계속 증가하여 8주에는 최고치 (0.47±0.11)를 나타냈다. 감염 흰쥐에서 충체 회수율은 8주까지 계속 충체 수가 감소하는 경향을 보였는데 특히, 장액의 IgA 항체가 성적이 최고치를 나타낸 기간에 유의한 감소 성적을 나타냈다. 감염 마우스 혈청에서의 IgA 항체가는 감염 기간동안 계속적으로 증가하여 감염 8주에서 최고치 (0.45±0.01)를 보였으며, IgE의 경우는 감염 후부터 7주까지 증가하여 7주에서 그 최고치 (0.23±0.02)를 보였으나 그 이후 다시 감소되었다. 장액의 경우 IgA 항체가는 감염 후부터 증가하여 8주에서 최고치 (0.14±0.01)를 보였으며, 이는 혈청 IgA의 항체가 변화와 유사한 경향을 보였다. 감염 마우스의 충체 회수율은 감염 후부터 계속적으로 감소하였으며 7주와 8주에서 유의한 감소를 보였는데 (p<0.05) 이것은 장약에서의 IgA 및 IgE, 혈청에서의 IgA의 항체가 최고치를 나타낸 기간과 일치하였다. 이상의 결과에서 호르텐스극구흡충 감염 마우스에 있어서, IgA 및 IgE 항체가의 유무는 충체의 배출(expulsion)에 일부 연관되어 있음을 알 수 있었다. The change in mean absorbance values for IgA/IgE in rats and mice infected with Echinostoma hortense metacercariae was studied from the 2nd week to the 8th week after infection, Serum and intestinal Iuminal content (ILC) levels of IgA/IgE were measured by enzyme-linked immunosorbent assay (ELISA). The mean absorbance values obtained from IgA in the rats' ILC increased from the 2nd week to the 8th week after infection. The peak value (0.47±0.01) appeared in the 8th week. The mean absorbance values of IgE in the rats' ILC didn't increase significantly (p>0.05). The worm recovery rate decreased at a slower pace after infection. The duration in which the peak value of IgA in rats' ILC appeared was similar to that in which the worm recovery rate declined significantly. Serum levels of IgA/IgE in mice increased gradually from the 2nd week after infection. The peak value (0.45±0.01) of IgA appeared in the 8th week, and that (0.23±0.02) of IgE appeared in the 7th week after infection. The ILC level of IgA in mice continued to increase after infection, and reached its peak in the 8th week. The change in IgA/IgE in the serum and IgA in the ILC of mice was inversely related to worm recovery rate. As a result of this experiment, it is supposed that IgA/IgE may play an important role in the expulsion of Echinostoma hortense.

Establishing the Factorial Validity of the Mathematics Teaching Efficacy Scale: Confirmatory Factor Analysis

RYANG Dohyoung 한국수학교육학회 2014 수학교육연구 Vol.18 No.1

This study develops the Mathematics Teaching Efficacy Scale (MTES) measuring efficacy beliefs of Korean preservice teachers seeking the secondary mathematics teaching certificate. This study focuses on establishing the factorial validity of the MTES based on Bandura’s two-dimension theory. The 2-factor structure of the MTES was explored on the first data set, andthen the structure was confirmed on the second subset.TheMTES consists of 18 items: 12items of the personal efficacy and the sixitems of theoutcome expectancy.

Flow Cytometric Characterization of Lymphocyte Subpopulations in Mice Infected with Clonorchis sinensis

Ryang,Yong-Suk,Ahn,Yung-Kyum,Shin,In-Soon THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCIEN 1996 Journal of biomedical laboratory sciences Vol.2 No.1

최근 세포 표면의 다양한 항원들이 발견되고 T세포 아형에 대한 정량적 측정이 가능하게 됨에 따라 세포성 면역기전의 규명과 이해에 획기적인 진전을 보이고 있다. T세포 아형의 phdenotype은 실험동물의 모델(model)이나 종(species)에 따라서 다양하며 차이가 나는 것으로 알려져 있다. 우리나라의 경우 아직도 80만명 이상의 국민이 간흡충에 감염되어 있을 것으로 추정되는 문제의 기생충이며 감염상태가 만성적일 때에는 간경화나 간암으로 까지 진행되는 흡충으로서 이에 대한 대책이 요구되고 있다. 그동안 간흡충의 면역에 대한 연구는 체액성 면역에 대한 연구는 많은 규명과 진전이 있어 왔으나 세포성 면역에 대한 기전이나 특성에 대한 연구는 미미한 상태이다. 저자들은 이와같은 사정을 감안하여 마우스를 실험 모델로 할 때에 요구되는 참고 자료와 기본 정보를 구하고자 하였다. 즉, 간흡충에 대한 세포 면역학적인 일부의 특성을 알아 보았으며, 특히 비장 림프구 아형에 대한 phenotype의 특성을 알아 본 결과 다음과 같은 성적을 얻었다. 간흡충의 조항원을 면역증강제와 함께 복강 투여한 후 기간 별로 비장 림프구의 아형 특성을 flow cytometry로 측정한 결과, CD2, CD5 그리고 CD8는 투여 초기에는 감소하다가 투여 7주 후에 다시 증가하는 현상을 보였으며, CD4의 경우 투여 초기에는 약간 증가하다가 투여 7주 후에 다시 증가하는 성적을 보였다. A Recent discovery of surface antigens in cells has led to the success of quantitative measurement of T-cell subpopulations, and this has especially opened the way for an epoch-making development in the understanding and classification of cellular immune mechanisms. It is known that phenotypes of T-cell subpopulations exist in many forms according to the variation of species or animal experimental models. In Korea, Clonorchis sinensis still gives rise to public concern as it infects more than eighty million people and threatens the public by causing cirrhosis of the liver, or liver cancer when liver infection becomes prolonged and chronic. Up until now there has been much progress in research and improvement in the classification system of Clonorchis sinensis in the area of humoral immunity, but as for research in the area of cellular immune mechanisms, there is almost none. Knowing all these circumstances, the authors delved for the characterization of lymphocyte subpopulations with mice as Clonorchis sinensis in the area of cellular immunity, and obtained the following results. That is, we injected Clonorchis sinensis antigens mixed in Freund's ajuvant solution intraperitoneally in mice and measured the T-cell subpopulation characterization of spleen lymphocytes with flow cytometry. The results of these measurements showed that CD2, CD5 and CD8 decreased early following injections but then increased again seven weeks after the injections. CD4, however, showed a slight increase shortly after the injection but then a fair increase seven weeks after the injection.

AN ITERATIVE ROW-ACTION METHOD FOR MULTICOMMODITY TRANSPORTATION PROBLEMS

Ryang, Yong Joon The Kangwon-Kyungki Mathematical Society 1996 한국수학논문집 Vol.4 No.1

The optimization problems with quadratic constraints often appear in various fields such as network flows and computer tomography. In this paper, we propose an algorithm for solving those problems and prove the convergence of the proposed algorithm.

Evaluation of Prior-Mixing Effect Using Technicon H*2

Ryang,Yong-Suk,Shin,Ein-Soon THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCINE 1995 Journal of biomedical laboratory sciences Vol.1 No.1

자동혈구분석기(Technicon H*2)에 대한 혈액검체의 측정전 mixing 횟수가 검사결과에 미치는 영향을 평가하기 위하여 19가지 parameter를 대상으로 초기측정치에 대한 반복측정치의 변화율을 종속변수로 하여 단순회귀분석을 실시하였다. Mixing횟수가 증가할수록 RBC, Hct, MCV는 통계적으로 유의하게(p<.01) 감소하였고, 호염기구 백분율은 유의하게(p<.05) 증가하였으므로 평가된 19가지 parameter의 21%인 4가지 검사항목에서 변화가 있었다. The effect of prior cumulative mixing was evaluated by means of a simple regression model which used as a dependent variable percentage(%) change of each repeated observed value for the initial value. The red blood cell count (RBC), hematocrit (Hct), and mean corpuscular volume(MCV) showed a significant decrease (p<.01), but % of basophils had a significant increase (p<.05). The ratios of rate of change (regression coefficient/SD) were. 0012 for RBC, .0020 for Hct, .0024 for MCV, and .0011 for % of basophils. Of the 19 parameters evaluated, 21% changed.