• Korean Journal of Adult Nursing
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• v.17 no.5
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• pp.753-761
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• 2005

Purpose: This study was performed to identify the difference in attitudes and knowledge between high school and college girls regarding sexual education. Method: Data was collected from questionnaires given to 99 high school girls and 110 college girls in Seoul and Kyunggi-do. Data was analyzed using the SPSS 12.0 program. Result: In middle school, the time given to sexual education influenced the students present knowledge of sexual education. The sources of sex education were friends, seniors and mass media. The score for sexual knowledge in high school girls was 12.78 and for college girls 24.19. The field that obtained the highest score in territorial sexual knowledge was 'reproductive physiology' in the high school girls. There was little awareness of venereal disease, AIDS, contraception. Sexual attitudes among college girls was more open than that of high school girls. There was a positive correlation between sexual knowledge and attitudes(r=.535, p<.001). The significant difference of items were residence and sexual experience(p<.001). Conclusion: This study was shown that realistic knowledge teaching of venereal diseases, contraception and AIDS should be included in planning of sexual education programs. Specially, the groups had sexual experience and college girls in the dormitory will need more specific teaching.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.896-897
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• 2006

In the viewpoint of engineering, materials problem is a key problem, which determines whether the exploitation of fusion energy will be success. The most important class of fusion materials is plasma-facing materials (PFM). W, as high Z high melting-point metal is one of the most important candidate materials due to its high plasma erosion resistance. Improving the ductility of W and W based alloy, lowering its ductile-brittleness transition temperature for meeting the requirements of fusion application is an important task. In this paper, severalpowder meatllurgy methods of fabricating W and W based materials are being investigated.

• Journal of The Korean Association For Science Education
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• v.14 no.3
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• pp.330-343
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• 1994

The purpose of this study was to investigate into common science and Science-Technology-Society education movement which are concerned in newly reformed 6th curriculum. These data were obtained by the survey of 291 high school science teachers who have no experience for the workshop of the common science in Kwangju city and 120 high school science teachers who have experience for the workshop of the common science in Kwangju city and Chollanamdo. The results were as follows: 1) They responded that the physics is more closely subject for the common science and thereby it could be charged for the common science by teacher of physics. 2) The 96.90 percent of the respondents (B-group) have confidence with teaching common science subject. 3) They favored that a device for the application of STS Thoughts is added last part of each chapter, last chapter or adequately introduce to each teaching. 4) They are not concerned about overlap with the contents of common science and each science contents (A-group:74.58 percent, B-group:78.35 percent). 5) They wondered about the various items of teaching and the lack of scientific surrounding Knowledge for solving problems. 6) They responded that if the common science are implicated into the current high school, the sciences will become a interesting. 7) Before the common science have become established, they was demanded a improvement of currently University Entrance Examination systems.

• Journal of Engineering Education Research
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• v.23 no.3
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• pp.13-19
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• 2020

The purpose of this study is to develop and apply a make-a-thon program based on engineering problem solving for science high school students and to analyze the changes of participating students. Through the consultation of teachers and experts, a team-based and student-driven engineering problem-solving-oriented make-a-thon program was developed. And, the program operated using KAIST's human and material resources for 51 students. Students composed of 12 teams studied 12 topics through an engineering problem-solving process, and the overall program satisfaction was very high, on average 4.62. Through this program, students' creative leader competency have been positively changed, especially in cognitive characteristics (diffusion thinking, problem solving ability) and social characteristics (pursuit of social values). Attitudes toward engineering also changed positively, especially in terms of difficulty of engineering, interest in engineering, gender role in engineering, and engineering and occupational factors. In conclusion, it was confirmed that this program is very effective for science high school students with high demand for engineering education.

• Proceedings of the KIPE Conference
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• 2001.10a
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• pp.295-300
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• 2001

A variety of high voltage DC power supplies employing the high frequency inverter are difficult to achieve soft switching considering a quick response and no overshoot response under the wide load variation ranges which are used in medical-use x-ray high voltage generator from 20kV to 150kV in the output voltage and from 0.5mA to 1250mA, respectively. The authors develops soft switching high voltage DC power supply designed for x-ray power generator applications, which uses series resonant inverter circuit topology with a multistage voltage multiplier instead of a conventional high voltage diode rectifier connected to the second-side of a high-voltage transformer with a large turn ratio. A constant on-time dual mode frequency control scheme operating under a principle of zero-current soft switching commutation is described. Introducing the multistage voltage multiplier, the secondary transformer turn-numbers and stray capacitance of high-voltage transformer is effective to be greatly reduced. It is proved that the proposed high-voltage converter topology with dual mode frequency modulation mode control scheme is able to be the transient response and steady-state performance in high-voltage x-ray tube load. The effectiveness of this high voltage converter is evaluated and discussed on the basis of simulation analysis and observed data in experiment.

• Journal of Industrial and Engineering Chemistry
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• v.68
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• pp.117-123
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• 2018

Recently, aqueous method has attracted lots of attention because it enables the solution-processed metal oxide thin film with high electrical properties in low temperature fabrication condition to various flexible devices. Focusing the development of aqueous route, many researchers are only focused on metal oxide materials. However, for expansive application of the aqueous-based metal oxide films, the systematic study of performance change with process variables for the development of aqueous-based metal oxide insulator film is urgently required. Here, we propose importance of process variables to achieve high electrical-performance metal oxide insulator based on the aqueous method. We found that the significant process variables including precursor solution temperature and humidity during the spincoating process strongly affect chemical, physical, and electrical properties of $AlO_x$ insulators. Through the optimization of significant variables in process, an $AlO_x$ insulator with a leakage current value approximately $10^5$ times smaller and a breakdown voltage value approximately 2-3 times greater than un-optimized $AlO_x$ was realized. Finally, by introducing the optimized $AlO_x$ insulators to solutionprocessed $InO_x$ TFTs, we successfully achieved $InO_x/AlO_x$ TFTs with remarkably high average field-effect mobility of ${\sim}52cm^2V^{-1}\;s^{-1}$ and on/off current ratio of 106 at fabrication temperature of $250^{\circ}C$.

• Journal of Practical Engineering Education
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• v.14 no.3
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• pp.471-477
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• 2022

In this study, an educational program was developed that allows students who take data science courses in the high school credit system to explore related fields after learning data science education. Accordingly, the existing research and requirements for data science education were analyzed, a learning plan was designed, and an educational program was developed in accordance with a step-by-step educational program. In addition, since there is no research on data science education for the high school credit system in existing studies, the research was conducted in the stages of problem definition, data collection, data preprocessing, data analysis, data visualization, and simulation, and referred to studies on data science education that have been conducted in existing schools. Through this study, it is expected that research on data science education in the high school credit system will become more active.

• Korean Journal of Community Nutrition
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• v.14 no.2
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• pp.175-181
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• 2009

The purpose of this study was to investigate the relationships of stress, depression, binge eating and food behavior of high school girls with their degree of BMI. One hundred twenty high school girls from the Seoul metropolitan area participated in this study. Self-administrated questionnaires to search for degree of stress, depression, binge eating, and food behavior were distributed. Anthropometric assessment was carried out to calculate the body mass index(BMI). The results are as follows: The mean of age and BMI of the subjects were $17.6{\pm}0.6$ years and $21.0{\pm}2.9kg/m^2$(ranged from 15.4 to $31.7kg/m^2$), respectively. 16.7%, 65.8% and 17.5% of the subjects were classified as under weight, normal weight and overweight, respectively. The average scores of stress, depression and binge eating were $124.9{\pm}31.4$, $15.2{\pm}9.8$, $29.5{\pm}7.8$ points, respectively. The food behavior score was $11.5{\pm}2.4$ points. Their degree of stress, depression, binge eating was significantly higher in overweight high school girls compared to underweight or normal weight high school girls. There were significant correlations of BMI with stress(p<0.05), depression(p<0.001), and binge eating(p<0.01). Also there were significant correlations of food behavior with stress(p<0.05), depression(p<0.05) and binge eating(p<0.001). These results indicate that the high school girls who have higher BMI seem to have more stress, depression, and binge eating habits. Also the high school girls who have more stress, depression and binge eating habits have poor food behaviors. Therefore proper control of emotions is required to maintain desirable food behaviors in high school girls.

• Journal of The Korean Association For Science Education
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• v.39 no.6
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• pp.799-807
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• 2019

The study was conducted to identify if the first-year program of science-focused school improved students' scientific core competency and science learning motivation. The first-year program of the science-focused school consisted of basic education in scientific inquiry, investigation, advanced experiment, and basic education in small research. There were a total of 262 participants in the program, and 169 students took three survey tests. Through the analysis of a group-based trajectory modeling, students were differentiated based on similarity of score changes. This study showed that the first-year program of the science-focused school significantly improved students' scientific core competency and science learning motivation. A group-based trajectory modeling found that about 40~60% of students saw the effects of the program. The students who chose the humanity track showed effects, while some students who chose the science-focused track did not show effects. A group-based trajectory modeling showed the methodological effects of identifying the change process of individual students. This study identified the positive effects of science-focused school policy statistically and is a meaningful example for analyzing the effectiveness of science-focused school programs.

• International Journal of Advanced Culture Technology
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• v.12 no.1
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• pp.34-42
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• 2024

This study investigated the academic achievement of science and high school students according to the characteristics of R&E activities in mathematics and science. In addition, based on the survey results, the correlation between R&E activity characteristics and mathematics and science academic achievement was studied through correlation analysis and factor analysis between subjects. There was a difference in academic achievement in mathematics and science according to the characteristics of the R&E activity area, and the experience of R&E activity was found to be closely related to the academic achievement of related subjects. Depending on the area of R&E activity, mathematical and scientific academic achievement was found to be two factors: mathematical logic and natural understanding. Natural understanding factors significantly influenced students' academic achievement in mathematics, physics, and life sciences, and mathematical logic factors significantly influenced the academic achievement of students in chemistry and earth science subjects. In particular, mathematical logic ability was concentrated in excellent physics class students, and natural understanding ability was concentrated in excellent life science class students. Since the characteristics of the R & E activity area greatly influence the academic achievement of mathematics and science, it will significantly contribute to the selection and operation of the R & E activity area of science high school students.