• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.130-137
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• 2013

This study tries to investigate the relationship between physical perception and creative thinking of dancers by dance imagery training programs. The inner imagery and the external expression of dancers are a divergent expression process of autosuggestion, and substantiate the relationship between physical perception and creative thinking. The key point consists in the active thinking process of problem recognition and problem solving by imagination, and means a new perceptivity and the communication capability. Dance imagery is a perception training based on the integration principle of body and soul, and so dancers should create a new approach of communication through the diversity of wide inner imagination and the active thinking of external expression.

• Prospectives of Industrial Chemistry
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• v.23 no.2
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• pp.40-50
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• 2020

소프트 로봇의 수요와 관심이 증가함에 따라 생체 모방형 액추에이터 연구가 큰 관심을 받고 있다. 액추에이터란 외부 에너지를 기계적인 동작으로 변환하는 장치이며, 재료 자체가 유연하여 부드러운 움직임을 재현할 수 있는 소프트 액추에이터의 연구가 활발히 진행되고 있다. 고분자 연성 재료 중에 하나인 하이드로겔은 90% 이상이 물로 구성되어 있기 때문에 생체 친화적이면서 동시에 환경 친화적인 재료이며 이를 기반으로 한 액추에이터 연구가 새로이 각광받고 있다. 최근에는 하이드로겔 액추에이터의 성능 향상을 위해 나노재료를 하이드로겔에 첨가하는 연구가 진행되고 있으며, 나노재료가 갖는 고유의 특성을 활용함으로써 하이드로겔 액추에이터의 자극 감응성 향상, 변형 방향의 제어, 높은 변형 효율 그리고 기계적 물성 증가가 보고되고 있다. 이는 헬스케어를 위한 웨어러블 장치, 재활을 목적으로 한 인공 근육 등에 적용이 가능하다. 본 기고문에서는 자극 감응성 고분자와 나노재료를 이용한 하이드로겔 액추에이터 연구에 대해 자극(전기장, 빛, 열, 자기장)의 종류에 따라 분류하여 소개하고, 합성 전략 및 구동 원리에 대해 간략하게 설명하고자 한다.

• The Journal of the Acoustical Society of Korea
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• v.34 no.2
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• pp.108-116
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• 2015

An acoustic vector sensor is a device that is capable of measuring the direction of wave propagation and the acoustic pressure. In this paper, the modeling of micro-cantilever sensor for the vector sensor are proposed by consideration of acoustic phenomenon in water. Two models based on unimorph structure are proposed in this paper and corresponding transfer function which describes the relation between input pressure wave and output voltage depending on incidence angle and frequency of pressure wave is derived based on lumped model. It has been shown that very thin and flexible micro-cantilever can be used to measure directly the particle velocity component in water.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.81-81
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• 2010

태양광 또는 자연의 힘을 이용한 에너지의 생산은 가까운 미래에 화석연료의 고갈과 이들의 소모로 인해 발행하는 이산화탄소로 인한 지구 온난화등의 문제로 인하여 그 중요성이 점증되고 있는 실정이다. 특히 태양광으로부터 전기에너지를 얻는 발전 방식은 오래전부터 연구되어 왔고 또한 상용화되어 국부적으로 보조 에너지원으로 이용되어 지고 있다. 동작 원리에 따라 이종접합에서 오는 전위차를 이용하는 방법, 동종 물질의 pn접합을 이용하여 기전력을 얻은 방법 및 연료 감응형 종류가 있다. 이 중에서 물질의 이종접합을 이용하는 방법은 아주 오래된 태양전력을 얻는 방식이나 그 동안 연구가 미비하였던 것이 사실이다. 이에 우리는 새로운 재료인 그래핀을 이용하여 산화구리와의 이종접합 태양전지의 제작및 특성을 분석 하였다. 화학기상증착법 (CVD)을 이용해 그래핀을 구리 박편 표면에 성장하였다. 적절한 온도(섭씨 약 1000도)에서 아주 적은 양의 수소 및 메탄을 흘려 주었을때 손쉽게 단일 원자층의 그래핀이 코팅된 구리박편을 얻을 수 있으며, 이 박편을 고온에서 산화 시키면 그래핀은 산화되지 않고 구리만 산화되어 손쉽게 쇼트키타입 태양전지를 얻을 수 있다. 이때 그래핀은 다른 공정 없이 투명전극의 역할을 한다. 간단한 전극을 부착하여 태양전지를 성능을 평가 하였고 그래핀 및 산화구리의 계면효과를 분석하였다. 효율면에서 III-V족 및 실리콘계의 태양전지에 비해 떨어지나 산화구리의 결정화 순도및 산화구리와 금속간의 계면개선 연구를 통해 극복가능 할 것으로 생각된다.

• The Journal of the Convergence on Culture Technology
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• v.3 no.4
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• pp.1-19
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• 2017

Death culture continues to lead human history with complementarity in the sense that it is half of life culture. The three sacred gates and the two tombs are connected to the olegil space. In this space, the principle of complementarity in which coexistence exist between life and death is hidden in Jeju culture. It is a question and wait. Contrarily, the opposite is complementary. (Contraria Sunt Complementa Latin) This refers to the relationship of each other in relation to one another and in a mutually dependent relationship. The Jong Nang is used as basic logic in DNA codon of human body as well as communication principle. In addition, there is a pattern of similarity of the linkage between the square oval ear of the grave, the Korean Taegeukguk and 卦, the genome (DNA) 卦. The Jong Nang 'Batdam' and 'Sandam' are conneted like 'black dragon ten thousand', and stone walls are connected to each other as the stone network, which is called as the 'Goendam' (and conventionally is told as the 'Goendang') and is related to the Family networks. The relationship between the Tomb of the ancestors and their offspring is believed to be "Soul Synchronizing the Ancestor to Offspring" and becomes "Change in Future", and Genetic factors in the physical blood are transmitted directly to the children. The DNA RNA was represented by the determinant.

• Journal of IKEEE
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• v.2 no.1 s.2
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• pp.53-60
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• 1998

We develope a high repetition rate, short distance, optical range finder for surface roughness measurements of large structures, such as a highway road, etc. For range measurement based on a triangulation principle, we use a light emitting diode and an one dimensional Position sensitive photodetector for a light source and an angle detector of the reflected light at the object, respectively. The range finder has automatic power control and electrical background noise rejection capabilities which enable it to overcome variations of an object reflectance and to eliminate time-varying, as well as constant, background light noises. Our experimental results show less than ${\pm}1.5mm$ of measurement errors regardless of an object reflectance, for $22{\sim}38cm$ object ranges which are determined by considering the installation of the range finder and the depth of surface roughness.

• Journal of Astronomy and Space Sciences
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• v.20 no.4
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• pp.283-298
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• 2003

The 2001 Leonid meteor storm has been observed all over the world, and its most intense flux since the last few decades has caused great interest among both laymen and experts. Especially, its maximum hours occurred at dawn hours of Nov. 19 in the east Asia, during which moonless clear night at the Mt. Bohyun allowed us near perfect condition of observation. Observation was carried out in the period of 01:00∼05:40(KST), which include the predicted maximum hours, with all-sky camera installed for upper atmospheric airglow research. Tn this paper we analyze 68 all-sky images obtained in this period, which contain records of 172 meteors. Utilizing the zenith hourly rate(ZHR) of 3000 and magnitude distribution index of 2, which were reported to International Meteor Organization by visible observers in the east Asia, we estimate the limiting magnitude of about 3 for meteors detected in our all-sky images. We then derive magnitudes of 83 meteors with clear pixel brightness outlines among the initially detected 172 meteors by comparing with neighbor standard stars. Angular velocities of meteors needed for computing their passing times over an all-sky image are expressed with a simple formula of an angle between a meteor head and the Leonid radiant point. The derived magnitudes of 83 meteors are in the range of -6∼-1 magnitude, and its distribution shows a maximum new -3mag. The derived magnitudes are much smaller than the limiting magnitude inferred from the comparison with the result of naked-eye observations. The difference may be due to the characteristic difference between nearly instantaneuous naked-eye observations and CCD observations with a long exposure. We redetermine magnitudes of the meteors by adjusting a meteor lasting time to be consistent with the naked-eye observations. The relative distribution of the redetermined magnitudes, which has a maximum at 0 mag., resembles that of the magnitudes determined with the in-principle method. The relative distribution is quite different from ones that decrease monotonically with decreasing magnitudes for meteors(1∼6) sensitive to naked-eye observations. We conclude from the magnitude distribution of our all-sky observation that meteors brighter than about 0 mag., appeared more frequently during the 2001 Leonid maximum hours. The frequent appearance of bright meteors has significantly important implication for meteor research. We noted, however, considerably large uncertainties in magnitudes determined only by comparing standard stars due to the unknown lasting time of meteors and the non-linear sensitivity of all-sky camera.

• Korean Journal of Heritage: History & Science
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• v.50 no.1
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• pp.18-41
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• 2017

The Gangjin WolnamSaji(月南寺址) is a small site where three-story pagodas and a destroyed tombstone remained. In 1973, it was discovered that the destroyed tombstone was that of the second master of Susunsa, Hye shim(慧諶), who had a special relationship with the military regime in Goryeo, and it once again attracted attention as a result of the recent excavation of the Rooftile of Yeonhwamun(蓮花文). In particular, the Windchime excavated in 2012 is a large-sized one group with a length of 23cm, and a relatively large Sanskrit character was decorated on four sides of the body. In addition, it was also confirmed in preservation process that the word 'gaecheon(盖天)' was engraved. The Sanskrit characters(梵字) om( , oṃ), a( , a), hum( , hūṃ), brum( , bhrūṃ) were decorated on the body of the Wind-chime excavated in WolnamSaji. Om( , oṃ), a( , a), hum( , hūṃ) are known as the Sammiljineon(三密眞言) and brum( , bhrūṃ) has the meaning of having the highest honor. In addition, the Sammiljineon(三密眞言) allows us to understand the truth by responding to the principle of universe, which is the Vairocana Buddha(毘盧遮那佛), and brum( , bhrūṃ) has the meaning of unity. In the end, the meaning of the Sanskrit decorating the four sides of the Wind-chime, of WolnamSaji(月南寺址), can be interpreted as the expression of the Buddha's doctrine, or the willingness to be combined with Buddha, the highest existence in itself. It is possible that the word 'gaecheon(盖天)' carved on the body can be regarded as the name of the master craftsman related to the making of the Wind-chime, but it is unlikely that it is the name of the master craftsman, considering that it is a place where the location is not easily seen. If so, you can think of the original function that the Wind-chime has. In other words, it can be interpreted symbolically and implicitly that the wish of the sound of the airwaves symbolized by the words of the Buddha covers the sky and spreads all over the place. It is thought that the Wind-chime excavated in WolnamSaji(月南寺址) was made in the mid to late 13th century considering the comparisons with another wind-chime excavated from the temple site, the historical situation in the late Goryeo, the publication date of the scriptures(經典) of Esoteric Buddhism(密敎).