해빈변형의 상사에 관한 연구

옥치율,김희종,동아대학교 공과대학 토목공학과,민병형 한국수자원학회 1986 한국수자원학회논문집 Vol.19 No.4

본 연구는 해빈변형과정에 침식과 퇴적사이의 상사성을 현지 및 실험실에서 결정하려고 수행되었다. 얻어진 결과는 다음과 같았다. (1) Horikawa 식의 이론을 적용하여 연구한바 침식과 퇴적사이의 상사성을 C값만으로 결정하기는 곤란함을 알았다. (2) 식만의 값으로 상사성을 결정하기는 곤란하였다. (3) 와 C, 와 의 무차원값을 현지 및 실험실에서 관찰한바에 의하면 가 0.024에서 침식, 퇴적이 구분되어 상사가 이루어졌다. (4) 파형경사를 알면 침 This research was carried out to decide both in the field and the laboratory the similarity between the erosion and the accretion in the change of the beach profile. The results obtained were as follows: (1) It was impossible to decide only by C value the

Ion-exchange Rsin의 Boiler水에 對한 硏究

玉致律 부산교육대학교 과학교육연구소 1986 科學敎育硏究 Vol.11 No.-

Materials in nature include much organ or inorgan and when chese are poisoned wieh pollution they can be dissolved and precipated so that these impure materials can be the cause of Scaled product and corrosion, when used as Boil water. The hardness of these impure materials may be concentreated and precipltated by the amount of impurity of Ca or Mg which were dissolved in water so that these impure materials can be scaled easily, and it is difficult to heat them electrically. Moreover there is danger when we heat them partly so it needs to exchange with Na-Salt. This exchange can be Ion-exchanged through sollening process so that the impurity in water can be eliminated.

초등 과학 교육과정에 나타난 환경 교육의 분석과 개선 방향

玉致律 부산교육대학교 과학교육연구소 1994 科學敎育硏究 Vol.19 No.-

The importance of environmental education in Korea began to be concretely stated in our curriculum at the 4th term. The present 5th-term curriculum contains more substantial and systematic contents of the environmental education. But our education still needs a lot as far as environmental learning is concerned. Three basic elements covered in the environmental education are concepts, problems, and protection. Each element is further classified and suggested according to the level of education at each school. The reports reveal, however, that the system of the environmental education at primary school is merely down a grade than that at middle school. Generlly speaking, our country's environmental education does not have its own system but is merely linked with thr general framework of the established environmental contents. The real environmental education should be concerned with actual living rather than with knowledge or classwork. As our educational reality hardly permits this desirable ideal, one of the urgent tasks in the future will be how to harmonize the various contents of the environmental education with the schoolwork and everyday life.

용액의 개념에 대한 교과서 분석 및 예비 초등교사의 개념 조사

옥치율 부산교육대학교 과학교육연구소 2003 科學敎育硏究 Vol.28 No.-

This study was to analyze how science textbooks explain solution and to investigate of perceptions of prospective elementary school teachers for solution. According to the result of the textbooks analysis, in elementary and middle school science textbook, the solution defines to the uniformity mixture, but the solvent defines to the material to be soluble and the solute defines to the material to soluble. In high school and university textbooks, the solution is a homogeneous mixture of two or more substances. In any solution, the substance present in the greatest amount is called the solvent and all other substances in the mixture are called solutes. According to the result investigate of perceptions of prospective elementary school teachers for solution, the most of prospective elementary school teachers could not have good grasp for the concept of the solution.

초등학교 과정에서의 환경 교육 분석과 發展 現況

옥치율 부산교육대학교 과학교육연구소 1996 科學敎育硏究 Vol.21 No.-

The educational significance to solve environmental problems is very high. So it is important purpose of the environmental education that the development of the skills and attitudes necessary to engage in the construction of comfortable environment with the sound value system and moral sense. However, it could be judged, in general, that the practice of environmental education in our country is insufficient in terms of its significance. It is inappropriate in the contents, approaches, practices, and strategies. Therefore, it is inevitable that the development and diffusion of the materials of systematic teaching and learning to the various educational situations. Furthermore, a revolutionary change is necessary to cope with a variety of current and anticipated environmental problems. To improve the quality of environmental education, the systematization of contents, the development of teaching and learning materials, and the revolution of instructional methods are required. Subsequently, it is our internal aspects that should be developed through the environmental education. Therefore, education coming through our mind can be the fundamental basis for the solving of environmental problems.

Methanol-1,1,2,2-Tetrachloro ethan 혼합용매계에서 치환 피리딘과 염화벤젠 술포닐의 친핵성 치환반응에 대한 속도론적 연구

옥치율,류준하 부산교육대학교 과학교육연구소 1990 科學敎育硏究 Vol.15 No.-

Kinetic studies on the nucleophilic substitution of benzenesulfonyl chloride with substituted pyridines have been conductometically carried out in 10-50(v/v)% MEOH-TCE mixtures. From the kinetic data, Hammett ρ_N values, Bro¨nsted β calues, and solvatochromic coefficients were determined caused by change in substitutents, and solvent properies. It is concluded that the reaction proceed associative S_N2 which bond formation is more advanced than bond cleavage.

이동상 해안 수리모형 실험에 있어서의 상사율에 관한 연구

옥치율,양윤모,민병형 한국수자원학회 1982 한국수자원학회논문집 Vol.15 No.4

본 연구는 매빈 지형변동에 관한 이동상 수리모형실험에 있어서의 난점인 매상저질축척 및 시간축척을 결정하는 방법을 제안하고 이 상사율에 의해 현지와 재현성이 좋은 실험결과를 얻었다. In this study, the method to determine the values of both bed-sand scale and time scale of movable bed hydraulic model experiments on beach degormation has been proposed and the results of the experiments reveal the verification of the similarity between

金屬工業 發水中 CN-ion의 酸化處理에 關한 硏究

玉致律 부산교육대학교 과학교육연구소 1984 科學敎育硏究 Vol.9 No.-

In these days owing to the development of industry much water-pollution has been risen by metal industry and it has been serious problem for our society. The rate of wastewater which was produced by metal and manufacturing factories cause these pollution problem. Especially plating factory always has much organic materials based on cyanic and cromic acids and produces these materials same time. Moreover the nature of produced wastewater by these factories is more complex than that of other factory. So we can find more poisonous CN-ion than other ion in this waste water. Considering these facts, to I want to study the method to theat CN-ion using oxidation.

초등 교육 과정에서의 환경 교육 분석과 發展 現況

옥치율 부산교육대학교 초등교육연구소 1995 초등교육연구 Vol.7 No.-

o,m-Benzene-di-Sulfonyl Chlorides의 친핵성 치환반응에 대한 연구

옥치율,박현석 부산교육대학교 과학교육연구소 1989 科學敎育硏究 Vol.14 No.-

The Nucleophilic substitution reaction of o, m-benzene-di-sulfonyl chlorides with various substituted anilines in methanol-acetonitrile binary solvent mixtures at -15℃ For the reactivity of substrates, m-benzene-di-sulfonyl chloride has higher than o-benzene-di-sulfonyl chloride according to the steric effect of ortho position and the order of magnitude for the second order rate constants, p-CH_3 aniline > aniline > p-Cl aniline is the tendency of nucleophilicity as expected. The magnitudes of ρ_N and β are lager than benzensulfonyl chloride and indicate a relatively advanced bond-formation in the transition state. Relatively small values of a/s is an indication that the polarity-polaribility(π^*) of solvent contributes more than the hydrogen bond donor acidity (α). The reaction proceeds via an associative S_N2 mechanism.