• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.1118-1120
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• 2004

Various technologies for new reflective LCDs with high performance are reviewed in this paper. Among of them, reflective STN-LCDs with single polarizor, novel single polarizor reflective LCDs based upon R-IPS mode and VA(vertical aligned) mode reflective color TFT-LCDs are discussed comprehensively. In addition, some new technologies which are under developed for the moment are also introduced briefly, including single polorizor reflective AF-LCDs (Antiferroelectric LCD) and reflective LCDS with none polorizor. Finally, we research the method to optimize the reflective LCDs.

• International Journal of Computer Science & Network Security
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• v.22 no.9
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• pp.396-402
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• 2022

The study deals with the problem of the formation of pre-service teachers' reflective skills in information environment. The role of reflection as a mechanism of formation of a modern teacher's self-consciousness was cleared up. The technology of formation of pre-service teachers' reflective skills was characterized and tested. The main stages of the technology were: a motivational and cognitive stage, a problematic and practical stage, and a reflective and operational stage. The substantiated pedagogical conditions of formation of pre-service teachers' reflective skills were adhered. The criterial and evaluative characteristics of the formation of pre-service teachers' reflective skills were worked out: components (reflection of personal conformity, reflection of the psychological and pedagogical barriers, reflection of professional growth); criteria (criterion of consistency, criterion of difficulty, criterion of potential); indicators (cognitive-evaluative, value-motivational, activity-creative). The levels of formation of pre-service teachers' reflective skills (insufficient level, acceptable level, and optimum level) were determined. The analysis of students' surveys showed the effectiveness and expediency of using the technology of formation of pre-service teachers' reflective skills in the process of professional training.

• Journal of Technologic Dentistry
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• v.23 no.2
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• pp.189-202
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• 2002

A study on reflective spectrum between In-Ceram alumina plate(IAP) and IPS empress 2 plate were carried out in order to determine the difference of reflective spectrum rates between materials and between thicknesses of materials(0.8mm, 1.0mm, 1.2mm) by visible wave. The rates are measured by spectrophotometer(Top scan model TC-1800). And an analysis of ANOVA and paired sample t-test were carried out. The results are summarized as follows. 1. The reflective rates of IAP and IPS increased slowly as visible wave spectrum increased. 2. The difference of reflective rates of IAP between 0.8mm and 1.0mm is significant but a little(less than 1%). The differences of reflective rates of IAP between 0.8mm and l.2mm and between 1.0mm and l.2mm are significant(8%, 10% ). 3. The differences of reflective rates of IPS between 0.8mm and 1.0mm and between 0.8mm and 1.2mm and between 1.0mm and 1.2mm are significant(0.06 %, 0.01 %, 2 %). 4. The differences of reflective rates of 0.8mm, 1.0mm between IAP and IPS are significant but a little(less than 0.9%, 0.5%). The difference of reflective rates of l.2mm between IAP and IPS is significant and larger than the other thicknesses relatively(7 %).

• Journal of Science Education
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• v.33 no.1
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• pp.133-141
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• 2009

In this study, pre-service science teachers' web-based reflective journals were analyzed. During four weeks teaching practicum, they were guided to post at least two reflective journals in a week on the Web bulletin board system. Finally, 307 web-based reflective journals written by 23 pre-service teachers were selected, and the domain and the level of reflective thinking were analyzed. As a result, pre-service science teachers' reflective journals were mostly related with teaching science, i.e., preparing and reflecting their own instruction, and the frequencies of these domains increased with the process of teaching practicum. Reflective journals about school administrative system, informal teaching practice, student guidance, and personal feeling were also included. The level of reflective thinking of 179 journals about teaching science were analyzed further. There were 53 (29.6%) journals including reflective thinking, but the higher level of reflection (professional reflection and critical reflection) was rare. The perceptions of pre-service science teachers on web-based reflective journal writing were also surveyed.

• Journal of the Korean earth science society
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• v.28 no.1
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• pp.1-13
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• 2007

The purpose of this study was to understand characteristics of students' reflective inquiry disposition in the contexts of classroom and to find educational implications for the promotion of the reflective inquiry activity in the inquiry-based class. In this study, we determined a characteristic of the reflection inquiry by examining students' responses showed in response to the different class types in high school earth science inquiry class. The result of the study indicated that the difference between the newly developed class type to promote the reflective inquiry and the existing inquiry class type was found significant. The newly developed reflective inquiry class had a multitude of reflective inquiry statements related to various elements of data context in terms of the quantity and diversity of the reflective inquiry. In conclusion, we found that the newly developed class type had a positive impact on the students' reflective inquiry activity. We believe that the development of the inquiry activity to promote students' reflective inquiry is critical.

• Journal of Science Education
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• v.40 no.3
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• pp.219-237
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• 2016

The purpose of this study was to improve the reflective thinking education so far and to improve the reflective thinking, academic achievement and scientific attitude of elementary school students. Two sixth grade classes were divided into two groups. Experimental group(13 boys, 11 girls) was treated with elementary science class using Reflective Thinking promotion strategies using Thinking maps and comparison group(14 boys, 10 girls) was treated with traditional way. The results of this study were as follows: First, reflective thinking strategy program using thinking maps has positively influenced the reflective thinking of elementary school students. Second, reflective thinking strategy program using thinking maps did not significantly affect elementary school students' academic achievement. Third, reflective thinking strategy program using thinking maps positively influenced elementary school students' scientific attitudes. Fourth, elementary school students' satisfaction with reflective thinking strategy programs using thinking maps was generally high. Most of students felt that this program was useful to learn, and to be interest in science. Based on these results, reflective thinking promotion strategies using thinking maps may be effective for reflective thinking and scientific attitudes of elementary school students.

• Korean Journal of Childcare and Education
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• v.16 no.5
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• pp.127-154
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• 2020

Objective: This study aimed to show and analyze the flow, content, and meaning of (prospective) early childhood educators reflective thoughts entailed in the process of planning, implementing and evaluating storybook reading by analyzing reflective journals written by technical college students enrolled in an advanced major curriculum after they completed a storybook reading assignment. Methods: The subjects of this study were 39 technical college students enrolled in an advanced major curriculum that participated in a 15-week-long 'storybook seminar' course. This study analyzed journals on storybook reading written by the students as an assignment for the storybook seminar course. Results: As a result, four categories of selecting a storybook, planning the reading of the selected storybook, actual reading of the storybook and subsequent activities were extracted according to the implementation process of storybook reading. Through this series of experiences, (prospective) early childhood educators had a childt-centered view of reading picture books, changed the method of reading picture books, re-recognized the importance of early childhood literature education, and developed a will to develop professionalism through reflective thinking. Conclusion/Implications: This study finds its meaning in showing the reflective thinking that occur within early childhood educators that plan, implement and evaluate storybook reading.

• Korean Journal of Agricultural Science
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• v.49 no.3
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• pp.521-529
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• 2022

This study evaluated the effects of agricultural reflective film and HANSPEK film on the fruit quality attributes and peel color variables of 'Fuji' apples. The reflective films were applied under the tree canopies at 20 and 30 days before harvest (DBH), and a tree with no films was used as the control. Depending on the measurement locations, the light intensity was 7.4 - 14.6% higher in the reflective film treatments than that of the control. However, no difference in the light intensity was observed between the reflective and HASPEK films. In addition, the light intensity was not also different between the 20 and 30 DBH. At harvest, the flesh firmness, fruit weight, soluble solids content, titratable acidity, and internal ethylene concentration were not different regardless of the type of reflective film and treatment time. In addition, the peel color variables were not affected in the equatorial region. However, in the calyx region, the L* and b* values were decreased, and the a* value was increased by the reflective and HANSPEK films compared with the control. Hence, the hue angle was decreased to near 0^o (red), and the peel color was improved. Therefore, this study suggests that the application of the HANSPEK film under a tree canopy could improve the fruit peel color of 'Fuji' apples.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.5 s.176
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• pp.1297-1304
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• 2000

The reflective photoelastic experiment can be used more effectively than the transparent type in industrial fields. Therefore the reflective photoelastic experimental hybrid method applied to the fatigue fracture problems is introduced in this research. It is verified that the reflective photoelastic experimental hybrid method is very useful on the determination of crack propagation velocity and stress intensity factor of the fatigue crack and on the separation of stress components in the vicinity of fatigue crack tip etc.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.16 no.2
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• pp.131-137
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• 2003

We have performed computer simulation to obtain electro-optic chracteristics of reflective liquid crystal display (LCD) using wide viewing angle LC mode, fringe field switching(FFS). Unlike other reflective LCD modes, in the FFS mode, the LC director in plance so an application to reflective display consisted of polarizer, LC layer and reflector is possible. when an incident light is 550mm, the optimal cell retardation value is 0.1365${\mu}$m and the efficiency of reflectivity is high over 90% with very little wavelength dispersion. Further, we have studied a new reflective display with polarizer, optical compensation film with half plate, LC plus reflector. The display with optimized cell parameters shows high contrast ratio (CR) over 130 with high light efficiency over 90% at normal direction and the CR greater than 5 exists over 60$^{\circ}$ of polar angle in all directions.