• Journal of information and communication convergence engineering
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• v.6 no.2
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• pp.192-197
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• 2008

High-speed harmonic optical modulation-demodulation schemes are presented and a possibility of the schemes for applying to high-speed light wave transmission system is tested at microwave frequency range. An example of this concept is as follows : Light wave is modulated succeedingly through cascaded optical modulators by a sub-carrier to produce a modulated light wave at harmonic frequency which is higher than the feasible frequency of the individual modulators. For demodulation of the base-band signal, the high frequency optical sub-carrier is down-converted by the same kind of optical modulator with the same concept of harmonic modulation.

• Journal of The Korean Association For Science Education
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• v.38 no.6
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• pp.813-823
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• 2018

The purpose of this study is to analyze elementary students' conceptual metaphor forms of light through their image schema of light. The participants were 162 $6^{th}$ grade students from G city, Gyeongsangnam-do. For this study, the analysis framework was developed as image schema analysis and systemic functional grammar analysis. Then, students' metaphorical expressions of light concepts were analyzed by the framework(image schema analysis and systemic functional grammar analysis). The findings are as follows. First, in the understanding of source of light, students had two structures of light. (a)Light comes out from a light source and goes straight in space. (b)Light is dispersed around a light source. Second, in the understanding of the process to see a material, students had five structures including scientific concept as light came out from a light source approaches the material and reflects off the material, then the light goes into the person's eyes. Third, in the understanding of reflection of light, students had four structures including scientific concept as light came out from a light source approaches the mirror and is reflected from the mirror.

• KIEAE Journal
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• v.17 no.2
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• pp.21-28
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• 2017

Purpose: The early churches such as tabernacle, temple and synagogue had played a important role to form space concepts of western churches. Tabernacle and temple were designed with vertical axis which consisted of sanctuary, sanctum, outdoor yard. Synagogue was designed pew of congregation around pulpit to give a sermon. The aim of this paper is to analyze spatial principles of churches designed with vertical axis and centralized plan. Method: The concept of vertical axis plan succeeded to Basilica, Romanesque and Gothic churches, and the concept of centralized plan succeeded to Byzantine and Renaissance churches. Therefore, this paper analyzed spatial characteristics and role of light in churches according to epoch, and was progressed by examining the existing researches and case studies. Result: The churches designed with vertical axis plan realized spatial composition to show the concept of domus dei, and worship space was illuminated with mysterious light. The churches designed with centralized plan realized spatial composition to show the concept of domus ecclesiae, and light created dramatic holiness in worship space.

• Journal of Korean Elementary Science Education
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• v.41 no.2
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• pp.283-294
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• 2022

Although the concept of light is important in the elementary school curriculum, substantial research suggests that students and teachers have difficulties in understanding it. Therefore, it is necessary to analyze the reasons for these difficulties-whether it is due to the content or due to the presentation method of contents, structure, and expression. The national curriculum and textbooks of Korea, the US, China, and Japan were comparatively analyzed from the following perspectives: 1) key concepts of light, 2) structure of light units in the textbook, 3) materials, light sources, and optics used in light units. Consequently, there were differences between countries in their inclusion of the concept of light in the curriculum. In particular, the Korean curriculum studies the concept of refraction by a convex lens, whereas the concept of light, light source, and vision is not introduced. Furthermore, countries also differed in their structuring of units. The Korean curriculum was presented segmentally by concept rather than structured according to core ideas or perspectives, and the connection between concepts was unclear. In addition, there were differences between the countries in materials, light sources, and optical instruments to explain key concepts. On using light, the US curriculum provides a purpose and uses light to achieve it, and China and Korea understand the concept. It was divided into the method of using the material to deepen. Based on the results of this analysis, the implications for the elementary science curriculum in Korea were derived as follows. First, it is necessary to introduce concepts sequentially and organize them so that the connection between concepts is well expressed. Second, it is necessary to introduce light and light sources as the predominant concepts. Third, it is necessary to include the principle of seeing objects. Fourth, it is necessary to adjust the material and content level of the refraction concept included in the light and lens unit. Fifth, an integrated approach is required because light has a deep connection with various concepts included in the elementary science curriculum.

• Korean Institute of Interior Design Journal
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• no.17
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• pp.128-135
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• 1998

The first issue was concerning the subject to provide students with an understanding of the principle of light its concept mental factors etc and with the observation and analysis of the light of an object and its form which is the process for designers to be able to deal with the deeper design concept by complementing the setting of necessary concept. The second issue was concerning the process of basic learning about basic electricity and lighting that lighting designers or interior decoration and architecture designer should have such as the introduction of light in kind of light source lighting system and so forth. The third issue was focused on practical affairs such as design and expression techniques the calculation of illumination using the computer simulation and so on. In addition such issues as the history of lighting photograph and its linkage with the field of engineering about new material ware addressed.

• Journal of Korean Medical classics
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• v.24 no.6
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• pp.49-61
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• 2011

The concept of Mingmen(命門) was originated from "Neijing(內經)" and "Nanjing(難經)", respectively meaning eye in "Neijing" and right kidney in "Nanjing". But the Mingmen theory had been developed on the basis of the concept of Mingmen in "Nanjing" thereafter, and it had been influenced by the Taoist alchemy in the process of explaining the relation between the concept of Xianghuo(相火) and Yuanqi(元氣). Out of this the Mingmen theory had been changed as a thing that comprises newly the concept of Huo(火), and consequentially the dispute about the arrangement between Mingmen and Xin(心) had been consistently progressed, because Xin is the center of Huo. And on the other hand, because Xin is also the center of mind, the influence of the state of Xin which is projected to Mingmen had also been discussed. Based on the facts like this, this study will discuss the possibility of the extension of the concept about the function of Mingmen. That is, this study will add up the concept of Mingmen in "Neijing" to the Mingmen theory so far, will add up the concept of Zhijue(知覺) to the Mingmen theory. The concept of Zhijue had been originated from the Neo-Confucianism in Song dynasty, and this study thinks, in the light of the concept of Zhijue, the concept of Mingmen could be viewed from a new perspective, that is, from a view of mind.

• Korean Institute of Interior Design Journal
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• v.14 no.5 s.52
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• pp.114-122
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• 2005

A study of light in Kahn's architecture must be significance as a work in building new architectural space and a new foundation for architecture, as well as clarification of the uniqueness of Kahn's architectural space and search for its significance. In addition, the study provides a greater comprehension of an the concept of Kahn's architecture by clarifying the degree of association of light into other concepts of architecture. Therefore, this study attempts to examine Louis I. Kahn's statement, sketch and work. His sketch along with the characteristics of the technique how to present it also enables comprehension of other aspects of architecture as a means to revive architecture. Khan's use of light enabled the evolution of primarily two types 'specular surface' and 'unique opening part' by associating them with the need to diminish glaringness. Each of these types has been evolved individually and is indicative of a concept of light that can be largely divided into ' object's light ' and ' space's light ' Object's light refers to a type in which the formative significance of structural part and different directions of light coexist, and its formative characteristics play a role that differentiate places within space. Space's light is present on wall spaces that limit space and exhibits its distinguished role differentiating places within space in the form of 'expression'.

• The Journal of Internal Korean Medicine
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• v.16 no.1
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• pp.17-32
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• 1995

The purpose of this is to understand the concept of Sacho on the basis of 'Sa-Sang philosophy(四象哲學)'. In oder to achieve this purpose, Sanjiao and Sacho were investigated, centering on the philophicalbasis, region. action. The conclusion would be summerized as follows. 1. Viewed in the light of a philosophical basis, Sanjiao is first recorded in Nae-Kyung(內經), a concept that Yin-Yang(陰陽), Oh-Hang(五行) in Nae-Kyung Medcine, the cosmos's order and it's moving rule could be directly applied to human body. On the contrary Sacho is a term first used by Lee Jae-Ma, a human-oriented concept that formed in Confucianism system. based on Sa-Sang type classifying in Sa-Sang Medicine. 2. Viewd in the light of a region, the upper part of Sacho is similar to the upper-jiao of Sanjiao, the mid-upper part of Sacha to the middle-jiao of Sanjiao, the mid-lower and the lower parts of Sacha to the lower-jiao of Sanjiao. But these regions are not equal to anatomical regions. Sanjiao and Sacha is similar concept from the view point of the upper and lower oder, but Sanjiao has only a concept of the upper and lower order, doesn't have a concept of the front and the rear, inside and outside. 3. Viewed in the light of a action, Sanjiao and Sacho is a similar concept from the view point of a large boundary in the life activity.Sanjiao explains the region of human body, setting imfortance on the viscera physiology, on the contrary Sacho explains the whole function of human body including one's heart's desire, physical constitution and the visceral physiolosy. 4. Viewed in the light of produsing-wasting activity. sanjiao and Sacho have both produsing action and wasting action. but Sacho has a more concrete concept of produsing action by using a term-Sa Hae(四海) 5. Viewed in the light of vital energy(氣)'s action, Sajiao give the first consideration to the rising and falling action of vital energy, on the contrary Sacho give the first consideration to the transversal circulation of vital energy and the deviation of it in each part. According to the above results, Sacho must be discussed separately from Sanjiao, it is recommended that further study is necessary to understand the concept of Sacho on the basis of Sa-Sang philosophy.

• KIEAE Journal
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• v.17 no.3
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• pp.83-90
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• 2017

Purpose: With the increase in the energy consumption in the building sector, many studies have recently been conducted to address this issue. Due to its efficiency, diverse studies on a light-shelf, which is a natural lighting system, are in progress. However, there has been no research on the external illumination that determines the performance of a light-shelf. Therefore, the present study aimed to prepare the external illumination standard for securing the lighting performance of a light-shelf through the light-shelf performance evaluation based on a 1:1 scale testbed, and to suggest a height-adjustable light-shelf based on an open and closed concept for the case in which the lighting performance of the light-shelf significantly deteriorates, by collecting the external illumination. Method: In this study, a 1:1 scale testbed was established for performance evaluation, and the external illumination standard for securing the performance of the light-shelf was prepared by comparing the lighting performance of the light-shelf depending on the open and closed condition of the light-shelf and the external illumination. Result: 1) In this study, a light-shelf that can be opened or closed depending on the external illumination was suggested. As a result, the prospect right can be secured by creating the condition where there is no light-shelf installation by moving the light-shelf to the top of the window when the lighting performance is not secured. 2) In the summer solstice, the external illuminations appropriate for lighting energy reduction were more than 75,000 lx and 60,000 lx for the light-shelf width of 0.3 m and 0.6 m, respectively. 3) In the intermediate period, the external illumination appropriate for lighting energy reduction was 60,000 lx. In the winter solstice, making the condition where there is no light-shelf installation by closing the light-shelf would be appropriate. 4) Based on the aforementioned results, the external illumination standard for the opening and closing of the height-adjustable light-shelf based on an open and closed concept suggested in this study was 60,000 lx, and the light-shelf with a width of 0.6 m would be advantageous for lighting energy reduction.

• Korean Institute of Interior Design Journal
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• v.24 no.6
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• pp.137-144
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• 2015

Light was the symbol of the city's prosperity and culture. People can walk around the city at the night time with safe. Now light is used with beauty and function at the same time. This study is the example how to draw the lighting design concept in specific city and district based on the citizen-minded survey. The citizen-minded survey makes a new chance taking the goodness and characteristics from local city specially and select the site for applying the specific opinion and requirement in the city. The expression of design concept on night landscape design gives the fresh image to the city during the night time. Because people feel the free and dynamic mood in the night landscape lighting, it is very important to set and express the design concept on night landscape design. The result of this study was applied in the Daegu city. In particular, the distribution complex's night landscape lighting in the Daegu was designed with specific concept expression from the citizen-minded survey. Making and expressing the design concept on night landscape design is basic for unity and diversity in the city.