• Journal of the Semiconductor & Display Technology
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• v.21 no.3
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• pp.130-134
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• 2022

An anti-reflective coating is used to improve the performance of the solar cell. The anti-reflective coating changes the value of the short-circuit current about the thickness. However, the current-voltage characteristics about the anti-reflective coating are difficult to calculate without simulation tool. In this paper, a modeling technique to determine the short-circuit current value and the current-voltage characteristics in accordance with the thickness is proposed. In addition, artificial neural network is used to predict the short-circuit current with the dependence of temperature and thickness. Simulation results incorporating the artificial neural network model are obtained using MATLAB/Simulink and show the current-voltage characteristic according to the thickness of the anti-reflective coating.

• Journal of Practical Engineering Education
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• v.15 no.2
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• pp.485-494
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• 2023

The purpose of this study was to examine the relationship between writing self-efficacy and academic achievement in a project-based university writing class, and the mediating effect of reflective journal writing. A total of 135 college students participated in the study. The results showed that students with higher writing self-efficacy had higher academic achievement and wrote more reflective journaling. Reflective journaling was found to have a positive impact on reviewing learned content, improving metacognition and memory, and promoting idea development. Overall, consistent reflective journal writing not only enhanced writing self-efficacy but also positively influenced academic performance.

• Korean Journal of Optics and Photonics
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• v.34 no.6
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• pp.248-260
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• 2023

A 0.5-numerical-aperture (NA) refractive-reflective objective, composed of a low-NA refractive and a reflective focal reducer, is designed. A 0.25-NA Lister objective is used for the refractive. A two-spherical-mirror system, corrected for spherical aberration, coma, and astigmatism is used for the reflective focal reducer. In spite of high NA, the refractive-reflective objective has an 18-mm working distance and improved imaging performance, compared to the 0.25-NA Lister objective.

• Journal of The Korean Association For Science Education
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• v.36 no.2
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• pp.221-229
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• 2016

This study aimed to investigate the effects of portfolio application on pre-service science teachers' reflective thinking. For the purpose, we used narrative inquiry on pre-service science teachers' portfolios. We also analyzed the dimensions and levels of pre-service science teachers' reflective thinking. Analysis results showed that the pre-service science teachers' reflective thinking was mostly centered on focus at the beginning of semester. In addition, they exhibited routine and technical levels of reflective thinking. Analysis of pre-service science teachers' reflective thinking showed it as gradually extending to the dimension of inquiry and dimension of change by the end of semester. Here, the level of reflective thinking was higher at the dialogic level and transformative level. Pre-service science teachers showed that they had difficulties in making portfolios. However, they answered positively about application of portfolios. The results of this study suggest that there is a need to actively introduce portfolio assessment in teacher education courses in order to increase the reflective thinking of pre-service science teachers.

• The Journal of Korean Academic Society of Nursing Education
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• v.15 no.2
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• pp.194-204
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• 2009

Purpose: Level of reflective thinking of students are important factors in the area of nursing studies on web-based PBL. These factors were used as a component of learning strategies. One was to understand general recognition to web-based PBL and reaction to the use of reflective journal. The other was to investigate the level of reflective thinking was related to learning activity. Method: PBL was adopted for an online course titled 'Nursing Assessment and Intervention'. Twenty graduate students were evaluated from questionnaire, reflective journals, and individual assignments. Result: Web-based PBL was strong for self-directed learning, team activity, creative thinking, diversity of thinking, and diverse process of learning while hard time, lack of cooperation, uncertainty of outcome, and lack of time were considered as weakness. Reflective journal gave moderate help to learning activities. The learners' learning activities was the lowest in the middle level of reflective thinking. Conclusion: Generally, graduate students in college of nursing showed slightly positive attitude to PBL experience and slightly positive reaction to the learning effect of reflective journal. PBL was estimated to be valuable and meaningful. There was no relationship between the level of reflective thinking and learning activities.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.2
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• pp.311-331
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• 2016

The purpose of this study was to analyze mathematical errors and the effects of reflective problem posing activities on students' mathematical problem solving abilities and attitudes toward mathematics. We chose two 5th grade groups (experimental and control groups) to conduct this research. From the results of this study, we obtained the following conclusions. First, reflective problem posing activities are effective in improving students' problem solving abilities. Students could use extended capability of selecting a condition to address the problem to others in the activities. Second, reflective problem posing activities can improve students' mathematical willpower and promotes reflective thinking. Reflective problem posing activities were conducted before and after the six areas of mathematics. Also, we examined students' mathematical attitudes of both the experimental group and the control group about self-confidence, flexibility, willpower, curiosity, mathematical reflection, and mathematical value. In the reflective problem posing group, students showed self check on their problems solving activities and participated in mathematical discussions to communicate with others while participating mathematical problem posing activities. We suggested that reflective problem posing activities should be included in the development of mathematics curriculum and textbooks.

• Textile Coloration and Finishing
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• v.29 no.3
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• pp.139-147
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• 2017

In this study, interesting area of development is retro-reflective thin film and then slitting to form retro-reflective material to be conbined with other fibers to form having retro-reflective characteristics, which slitting yarn can then be to provide fabrics. Glass beads are microscopic spherical size with diameters ranging from several microns to several millimeters. Applying the effects of optical property, glass beads are consumed for road safety used to make traffic signs, safety clothing and others. Glass beads retro-reflective films can be turned into slit yarns through slitting yarn process. The slit yarns can be combined into textiles using diverse methods such as weaving to provide a fabric having retro-reflective characteristics. Lightness and Luminance was increased with decreasing of interval of slit yarn in the fabric. Also, the hue is shifted greenish and bluish with interval of slit yarn.

• Journal of Korean Elementary Science Education
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• v.30 no.3
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• pp.271-281
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• 2011

The environmental education is based on the assumption that accurate knowledge and attitude could be linked to real action, but those have no effect on changing the behavior. To effect the change in behavior, we need to consider the reflective thinking which can make people change their behavior. The strategies to accelerate the reflective thinking are five steps of the reflective thinking process and the interaction through the discussion of students. And also, it is more proper if the contents are based on the real experiences of the students. Thus, this study tried to know whether the improvement of reflective thinking was able to affect to the environmental behavior. The environment education program was applied to the 60 elementary school 6th grade students in Gyeonggi-do and the survey methods were presented in the general experimental curriculum. To study 6th subjects (energy, harmful chemical material, heavy metal and agricultural chemicals, food additive, environmental friendly consumption, and recycle) was developed. This study shows the effect of the program on the environment knowledge, the environment behavior, the level of reflective-thinking and communication ability.

• Human Ecology Research
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• v.60 no.2
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• pp.177-186
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• 2022

The purpose of this study was to explore the relationships among mothers' reflective function, preschoolers' empathy, executive function, caring behaviors. Subjects for this study were 498 preschoolers and their mothers. Mothers' reflective function was assessed by the Parental Reflective Functioning Questionnaire(PRFQ). Preschoolers' empathy was assessed by the Questionnaire of Cognitive and Affective Empathy(QCAE). Preschoolers' executive function was assessed by the Behavioral Rating Inventory of Executive Functions-Preschool Version(BRIEF-P), and caring behaviors were assessed by the caring behaviors scale(Kim, 2015). Data were analyzed using descriptive statistics, confirmatory factor analysis(CFA), and structural equation model(SEM) with the SPSS 25.0 and AMOS 23.0 program. The major results of this study were as follows. First, mothers' reflective function showed direct effects on preschoolers' empathy, executive function, and caring behaviors. Second, the preschoolers' empathy and executive function showed direct effects on preschoolers' caring behaviors. Third, preschoolers' empathy mediated the effects of mothers' reflective function on preschoolers' caring behaviors. The findings of this study will contribute to designing intervention programs to improve preschoolers' empathy, executive function, and caring behaviors.

• Korean Journal of Childcare and Education
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• v.20 no.1
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• pp.1-19
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• 2024

Objective: The purpose of this study was to verify the mediating effect of reflective thinking in the relationship between early childhood teachers' play-based curriculum implementation competences and their digital competences. Methods: An online survey was conducted targeting 330 early childhood teachers. Descriptive statistical analysis, correlation analysis, and The Process macro model 4 were performed using SPSS 28.0 and The Process macro 4.1. Results: The main results of this study are outlined as follows: first, a significant positive correlation was observed between overall play-based curriculum implementation competences, reflective thinking, and digital competences, including each of their respective sub-factors. Second, the study revealed that reflective thinking played a partial mediating role in the relationship between early childhood teachers' play-based curriculum implementation competences and digital competences. Conclusion/Implications: Through this study, it was confirmed that when reflective thinking mediated play-based curriculum implementation competences, digital competences were further increased. The findings suggest that not only positive play-based curriculum implementation competences of teachers but also reflective thinking should be considered to enhance digital competences.