초등학교 과학과 에너지영역의 STS 내용 변천

서승조,조태호,백남권,김성규,박강은,정인재 晋州敎育大學校 科學敎育硏究所 2001 科學敎育硏究 Vol.27 No.-

This research compared and analyzed the content ratio of the STS (Science-Technology-Society) Education and subjects and types of learning activities to determine the characteristics of STS education in science classes of elementary schools. In the 5th curriculum, the STS-related content on energy section took up 6.6% , in the 6th curriculum, compared with that of the 5th, the STS content ratio on the energy section increased 7.9% and the STS content on the energy section in the 7th curriculum showed an increased 20.8% proportion. Comparing the main subjects of the STS in the energy section for the science class according to curriculum in the 5th, they obviously have influenced technological development, energy, the development of space studies, and sociology of science, in that order. In the 6th curriculum. compared with that of the 5th, the energy section decreased and the sociology of science increased much. There were no significant changes in other subjects. In the 7th, the STS elements were distributed evenly but the extent of the STS main subjects reduced compared to that of the 6th. The STS education activities represented in science textbooks of elementary schools were mainly executed through discussion, research activities, and actual activities. Other activities such as role-playing, simulation tests, problem solving and decision making, data analysis, research design, case studies, etc. were hardly made.

초등학교 과학 수행평가에 대한 교사의 인식

서승조,조태호,백남권,박강은,김성규,박장서 晋州敎育大學校 科學敎育硏究所 2001 科學敎育硏究 Vol.27 No.-

The purposes of this study are to examine how Science Performance Assesment is being well conducted in elementary schools and to check the teachers' awareness through surveying the actual condition. To achieve this purpose, the author, in this study, distributed questionnaire developed by researcher under supervision of academic advisor to the elementary school teachers in Gyeongnam province. Based on the data. the research results were mainly analyzed by the statistical method using Chi-square test. The survey was consisted of questions which was designed to perceive teachers' awareness about elementary school science performance assessment. The main findings of this study are summarized as follows', 1. Elementary teacher's are doing affirmative estimation about induction of performance assessment. 2. Most teacher are recognizing performance assessment right and teachers' understanding appeared high. 3. Material development of performance assessment is recognizing that people who have opinion which is special must develop. 4. The biggest problem of performance assessment fixing is recognizing that number of persons per class are many and amount of training courses is much also with the tribe during time. 5. It was recognizing positively whether it is in class improvement of performance assessment effect. 6. Teachers had awareness that confirm studies accomplishment degree through performance assessment, or will utilize to improvement material of teaching-learning method.

협동학습이 자연과 학업성취 및 과학태도에 미치는 효과

서승조,백남권,조태호,김용진 晋州敎育大學校 科學敎育硏究所 1999 科學敎育硏究 Vol.25 No.-

The purpose of this study is to manifest the effect of STAD cooperative learning which has not yet been explained in cooperative learning of an elementary school, on the academic achievement in science and science related attitudes. Therefore, in order to achieve that purpose, I established the following issues of study. First: What effect does STAD cooperative learning have on the elementary school students' academic achievement in science? Second: What effect does STAD cooperative learning have on the elementary school students' science related attitudes? The results of the study are as follows. First, while it was proven that the effect of STAD cooperative learning on academic achievement in science had no significant difference in pre·post achievement levels for both the experimental group and the control group, the experimental group showed larger changes in the mean value than control group; it can be inferred that classes to which cooperative learning is applied is more effective than traditional science classes. Second, in regard with the effect of STAD cooperative learnign on science related attitudes, while there was a significant difference between the experimental group and control group in pre examination, there was no significant difference, which means STAD cooperative learning does have effect on science related attitudes. In conclusion, the results of this study manifest that STAD cooperative learning is effective for science related attitudes in elementary school science classes, and assume that it can be effective for academic achievement.

초등학교 교사들의 과학과 실험연수에 대한 의식 조사

서승조,조태호,백남권,김성규,박강은,정순호 晋州敎育大學校 科學敎育硏究所 2001 科學敎育硏究 Vol.27 No.-

This study investigated the perceptions of elementary school teachers' on the science experimental training course using closed-form questionnare. 437 elementary school teacher, 21 school, 14 cities and counties in Gyung Nam province were selected as the objects for researching these matters. The results were as follows; First, without system and holding type teachers choose on the training not the same time but their ability freely. Second, to extend the trust the composition of place and instructor must be based on professor and research in the national university of education. Third, the composition of the text must be made of scientific growth based on important experimental activities teaching strategy, the using of materials. It must be increase multimedia training course on the science education. Fourth, the method of training course it must be happen on the experiment and discussion and it is necessary to grow up training level. Fifth, the type of training it must not give the score. Therefore it will be free and comfortable without difficulties. In the results, the improvement of science experimental training course is compatible on the purpose and it will help on the science teaching-learning.

리오캐스팅한 Al-Si 및 Mg-Al-Zn합금의 특성

이정일,양권승 조선대학교 생산기술연구소 2006 生産技術硏究 Vol.28 No.2

The effect of various thermomechanical treatments on the structure and rheological behaviour of Al-Si Al alloy and Mg-Al-Zn Mg alloy in its solidification range were investigated using a Searle type high temperature viscometer. During continuous cooling, the viscosity increases gradually with increasing fraction of solidified alloy, until a chtical fraction of solidified alloy is reached above which the viscosity sharply increases. The viscosity of the slurry, at a given volume fraction solid, decreased with increasing shear rate.

Ni-Cr-Mo鋼의 熱處理에 따른 機械的 性質과 衝擊靭性에 關한 硏究

秋現植,梁權承,崔秉起 조선대학교 기초과학연구소 1987 自然科學硏究 Vol.10 No.1

The influence of heat treatment on the mechanical properties and the charpy impact toughness of Ni-Cr-Mo Steel in austenitizing temperature range between 750℃~1100℃ and tempering temperature range between 250℃~500℃ was studied. The results obtained from this study are summarized as follows; 1) The most impact energy is obtained at about 900℃ of austenitizing temperature, and at the temperature of more than 900℃, impact energy decreased. That was seen to be caused from coarse of martensite structure. 2) As the austenitizing temperature increased, strength and elongation decreased. As tempering temperature increased, strength and hardness decreased, but elongation increased. 3) When the tempering temperature was 350℃, the impact energy was lowest and as the temperature was high, the impact energy increased. 4) As the austenitizing time under constant austenitizing temperature was long, hardness and impact toughness decreased.

초등교사의 과학과 환경 교육에 대한 수업실태 분석 및 인식도

조태호,서승조,백남권,김성규,박강은,박원석 한국환경과학회 2002 한국환경과학회지 Vol.11 No.7

The purpose of this study was to analyze the elementary school teachers' perception toward the environment-related subjects in science education and to investigate their instructional methods in delivering the subjects in the classroom. The participants of this study were 300 elementary school teachers sampled from elementary schools in Kyung Nam Province. The findings of this study were as follows; First, more than half of the teachers surveyed showed that the environment-related units and contents in the science textbook were insufficient to the existing issues. Second, the large portion of teachers responded that the teaching materials in the textbook were insufficient to deliver the contents. Third, the largest portion of respondents replied that their preferred instructional method was a teacher-directed instruction followed by a case study approach. Fourth, in terms of the effectiveness of environmental education, both male and female teachers showed negative responses. Furthermore, male teachers were more negative than female teachers. Fifth, total means of their preference of the environment-related units was 3.13. The unit for sixth graders titled 'Environmental Pollution and Protecting Nature' showed the highest preference, whereas the unit for fifth graders titled 'Structure and Functions of Plants' showed the lowest preference. Sixth, there was no statistically significance in gender and their working areas. Seventh, there was statistically significant differences between male and female teachers in terms of teaching experience. In detail, the teachers with 5 to 9 teaching experience showed the lowest scores, while the teacher with more than 15 years teaching experience showed the highest scores in their perception of the units. Eighth, there was a significant difference between two groups in terms of their educational background. For example, two-year college graduates showed higher preference than four-year college graduates.

MeV이온주입을 사용하여 Buried Layer를 포함한 CMOS Retrograde Well 제조시 발생하는 격자 결함에 관한 연구

盧在相,柳承翰,柳漢權 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2

MeV ion implantation has been recently employed in the field of CMOS (complementary metal oxide semiconductor) retrograde well engineering. An issue on MeV ion induced damage is critical especially in forming a buried layer below the well. MeV B implanted buried layers were observed to show greatly improved characteristics of latchup suppression. Junction leakage current, however, showed a critical behavior as a function of ion does. The rod like defects were observed to be responsible for the leakage current. Rod-like defects were generated near the ??(projected range) and grown upward to the surface during annealing. According to cross sectional examination of each pit density, they were generated and propagated between 700。C and 800。C. They shrink or change into long, elongated dislocation loops at higher temperatures above 900。C. Results of SIMS (secondary ion mass spectroscopy) analyses and two-step-annealing (700。C/3∼6hrs.→900。C/1hr.) indicate that interstitial oxygens impede shrinkage of existing-g rod-like defects at higher temperatures above 900。C.

Angiotensin Concerting Enzyme 유전자의 유전적 다형성(Genetic Polymorphism)이 관상동맥 질환 위험인자에 따른 혈중 Plasminogen Activator Inhibitor-1의 농도에 미치는 영향

김덕경,김종원,권현절,류재춘,박승우,김준수,이상훈,홍경표,박정의,이원로 대한고혈압학회 1996 대한고혈압학회지 Vol.2 No.2

SKD11 冷間金型材의 熱處理에 따른 機械的 性質의 向上에 대하여

吳應源,安幸根,梁權承 조선대학교 동력자원연구소 1988 動力資源硏究所誌 Vol.10 No.2

In order to study the change of properties of SKD11 for Cold-Working Die Steel with the various heat treatment, the change of microstructures, hardness, carbide precipitations, amounts of retained austenite and impact value have been investigated. The optimum solution temperature is 1000℃ in case of oil quenching, and is 1050℃ in case of air cooling on considering impact value. In case of high-temperature tempering the hardness is not reduced greatly due to secondary hardening by carbide precipitaion. The value of Charpy impact is high in case of air cooling after holding at 1050℃ for 1/3hr. Considering the hardness and toughness, however, the air cooling after holding at 1050℃ for 1/3hr is appropriate for tool die steels. The value Charpy impact increases by 550℃ tempering treatment.