• Proceedings of the Optical Society of Korea Conference
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• 2001.02a
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• pp.140-141
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• 2001

반사형 STN-LCD (supertwisted nematic liquid crystal display) 는 많은 display에서 사용되고 있는 LCD mode 중의 하나이다. 그러나 현재 많이 사용되는 반사형 STN-LCD는 그림 1과 같이 한 장의 polarizer와 두장의 retardation film을 사용하는 구조이므로 각각의 component에 대한 parameter들에 의해 display의 표시 성능이 좌우된다. 먼저 Reflective STN-LCD의 보상에 필요한 parameter를 살펴보면, 그림 1과 같이 5개 ( $\alpha$, ø$_1$, ø$_2$, 각 retarder의 retardation : Δnd$_1$, Δnd$_2$)의 parameter의 결정이 필요하다. (중략)

• Proceedings of the Optical Society of Korea Conference
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• 2004.02a
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• pp.138-139
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• 2004

In this paper, we propose a reflective In-Plane Switching twisted nematic mode with negative liquid crystal and weak surface anchoring energy (10$^{-6}$ J/m) in order to enhance reflectance and cellgap margin.

• Journal of the Optical Society of Korea
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• v.10 no.1
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• pp.11-15
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• 2006

We have proposed and theoretically verified an optical regenerator using a single semi-reflective semiconductor optical amplifier (SR-SOA). To explain the operation characteristics and the operation condition of the proposed opticalregenerator, the simplified gain model for the SR-SOA is introduced and confirmed by comparing the result of the SOA simulation based on the transfer matrix method (TMM). The simulation results show that both extinction ratio (ER) enhancement and signal amplification can be achieved in the proposed regenerator.

• Journal of the Chungcheong Mathematical Society
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• v.23 no.3
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• pp.589-598
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• 2010

Generalizing normally quasi-ordered spaces, we introduce a concept of regularly quasi-ordered spaces and study their categorical properties. We obtain well behaved reflective subcategories of the category Rqos of regularly quasi-ordered spaces and continuous isotones, namely the full subcategory of Rqos determined by $T_0$-objects among others, and this result can be extended to that in the category Nqos of normally quasi-ordered spaces and continuous isotones.

• 대학교육
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• s.16
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• pp.50-55
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• 1985

• Kyungpook Mathematical Journal
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• v.18 no.2
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• pp.143-146
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• 1978

• Journal of the Korean institute of surface engineering
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• v.48 no.2
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• pp.50-55
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• 2015

$Al_2O_3$ thin films were deposited on the moth eye anti-reflective nanostructured polycarbonate films by atomic layer deposition (ALD) techniques. Without ALD-$Al_2O_3$ thin films, moth eye anti-reflective nanostructured films had a high optical transmittance of 95.47% at a wavelength of 550 nm and a very poor hardness of 0.1381 GPa. With increasing the thickness of $Al_2O_3$ thin films from 5 to 25 nm, the transmittance of moth eye anti-reflective nanostructured films was gradually decreased from 94.94 to 93.12%. On the other hand, the hardness of the films was greatly increased from 0.3498 to 0.7806 GPa with increasing the thickness of $Al_2O_3$ thin films. This result shows that ALD thin films can be applied to improve mechanical properties with an adequate optical transmittance of the conventional moth eye anti-reflection nanostructure films.

• Journal of Korean Elementary Science Education
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• v.32 no.1
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• pp.104-112
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• 2013

We examined the strategies to stimulate the reflective thinking using science notebook for the improvement of problem solving ability which is one of the core skills for the future. The strategies we derived have four steps which are input, output, solving mission and reflection as my own mirror. We applied the strategies to the 6th grade class for autumn semester in order to examine the students learning process and the result. We could observe that students looked into their own learning and had a time to look back their activities in the class. We could also confirmed that science notebook would be effective to improve the problem solving as stimulating the reflective thinking. In addition, we could specify the strategy of using science notebook in the class. At a 'input' stage, students should be able to choose their own learning style as their preference and teacher need to give them proper feedback. Interaction with peers should be emphasized during the activities as 'question attack' and 'question defense' in 'output' stage and 'solving mission' stage. You should suggest the students various method to record their thought from looking back their classroom activities instead of mere writing. We also examine the students achievement from the students' notebook and Meta Cognitive Awareness test. As a result, students who had studied using science notebook showed statistically meaningful higher achievement than controlled students.

• 전자공학회논문지 IE
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• v.44 no.4
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• pp.48-54
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• 2007

Due to the diverse utilization of multimedia, interests are increasing towards processing (saving, editing, searching, etc) three dimensional object data. This paper proposes and realizes a retrieval system for three dimensional objects using reflective symmetry. For the retrieval method, a reflective symmetric axis with a projector is used. The symmetric plane is calculated by the reflection symmetry, and the depth buffer is calculated for the symmetric plane. Then, by applying the Fourier Transform to the depth buffer, the feature vector for the object is generated and retrieved. For the sample of inquiry, the model of similar symmetry was extracted using the benchmark data from Konstantz University. Considering that most of the objects have symmetrical characteristics, the proposed method of retrieving three dimensional objects using a reflective symmetric surface is an outstanding retrieval system.

• Journal of the Korea Convergence Society
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• v.6 no.6
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• pp.43-56
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• 2015

The purpose of this study is to explore undergraduate students' professional growth experiences as a novice counselor through reflective journal writing. Study participants were six students who completed the counseling skills course. The analysis was done on their weekly reflective journals using Colaizzi's phenomenological qualitative method. As a result, 11 sub-categories and 3 categories were emerged: increasing recognition and knowledge regarding counseling, being troubled and frustrated due to one's inexperiences of counseling, trying to overcome frustration toward professional counselors. This study revealed counseling major undergraduate students' professional development experiences and can be utilized in counseling training program development in the future.