• The Science & Technology
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• no.3 s.406
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• pp.62-67
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• 2003

갯벌은 다양한 생물이 살아가는 소중한 공간이며 동시에 사람들에게는 오염물질을 정화시켜주는 '자연의 정화조' 역할을 하는 곳이다. 또한 갯벌은 '단백질의 공급창고'로 불릴 만한 영양과 높은 음식재료를 충실히 제공하는 곳이다.

• Electrical & Electronic Materials
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• v.32 no.5
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• pp.18-30
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• 2019

• Electrical & Electronic Materials
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• v.35 no.4
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• pp.28-41
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• 2022

• Electrical & Electronic Materials
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• v.35 no.5
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• pp.29-38
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• 2022

• Electrical & Electronic Materials
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• v.35 no.6
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• pp.10-19
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• 2022

• Conservation Science in Museum
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• v.29
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• pp.81-98
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• 2023

This study was conducted to examine the effect of the light source for the media facade of the 10-story Gyeongcheonsa Stone Pagoda on the pagoda's restoration materials. To restore the pagoda, two types of epoxy resin-L-30, Araldite (AW106, and HV953U)-were used, and the photostability of the restoration materials and the acceptable lighting irradiation time were estimated through accelerated aging experiments of the restoration specimens. Six types of specimens were used in this process: a specimen painted with blue and yellow pigments for each resin type, and an unpainted specimen. Among them, the ΔE of the unpainted specimens (BA) of Araldite AW106 and HV953U was the highest of 4.66, and the acceptable light irradiation time was about 130,000 hours if the change rate of ΔE is limited to about 1. It was confirmed that the BA specimens were losing their characteristics due to light, as their reflectance and transmittance increased and the absorbance decreased, making them more transparent than their original color. It was found that the painted specimens had a low change rate of ΔE, with insignificant changes in their reflectance, transmittance and absorbance. Therefore, the use of pigments with high photostability provides more restoration materials options.

• Conservation Science in Museum
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• v.28
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• pp.109-136
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• 2022

This study analyzes the , one of the three panels of 《Welcoming Banquets for the Governor of Pyeong-an》, a documentary painting of the late Joseon Dynasty, with the aim to identify the coloring materials used in the painting. The painting was first imaged at each wavelength in order to minimize the potential problems in the process of analyzing specific parts. This study applied X-rays to identify ink, gold, and organic and inorganic pigments and used infrared rays to find ink and copper-based pigments. It also applied hyperspectral imaging to distinguish organic pigments from black, blue, and green materials. It also analyzed spots selected for each color to identify the following materials: white lead (white), ink/indigo (black), a combination of red lead and cinnabar (red), pink dye, purple dye, iron oxides (brown), orpiment/dye (yellow), malachite/malachite and yellow dye/indigo (green), azurite/white lead and indigo/indigo (blue), indigo and cochineal (violet), and gold leaf (gold). It is expected that more efficient analysis will be made possible by securing a sufficient library for each wavelength.

• Korean Journal of Metals and Materials
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• v.46 no.6
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• pp.338-344
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• 2008

The crystallization kinetics of the $Cu_{43}Zr_{43}Al_7Be_7$ bulk metallic glass were studied by differential scanning calorimetry(DSC) in the continuous heating and isothermal annealing modes. Only one major peak could be detected on the DSC traces of $Cu_{43}Zr_{43}Al_7Be_7$ bulk amorphous alloy, and the activation energy for crystallization corresponding to the peak determined by the Kissinger method was resulted of 239 kJ/mol. The isothermal kinetic, analyzed by the Johnson-Mehl-Avrami equation yielded values for the Avrami exponents in the range 1.69 to 2.37, which implied a crystallization governed by a three-dimensioned growth. Primary phases were essentially the cubic structure CuZr together with the $Cu_{10}Zr_7$ phase. At higher temperature, the CuZr disappeared while the $Cu_{10}Zr_7$ became predominant. After long term annealing at 731 K, the phases were $Cu_{10}Zr_7$, $Cu_2ZrAl$ and $Al_3Zr_5$.

• The Science & Technology
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• v.34 no.1 s.380
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• pp.18-19
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• 2001

런던의 과학박물관은 영국 뿐만 아니라 세계 과학기술의 역사를 한 눈에 볼 수 있도록 지하 2개층과 지상 5개층에 꾸며놓고 있었다. 1층엔 동력ㆍ우주분야, 2층엔 재료변화, 3층엔 화학산업ㆍ인쇄, 4층엔 광학ㆍ항공분야 그리고 5~6층엔 의학관련 분야로 분리되어 전시ㆍ소개하고 있었다. 특히 지난 7월에 개관한 WW관엔 2000년대의 과학기술방향과 돌리를 탄생시킨 영국의 생명공학발전상 그리고 미래의 디지털기술에 관련된 전시물들이 진열되어 있었다.

• The Science & Technology
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• v.33 no.3 s.370
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• pp.12-14
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• 2000

과학기술은 새로운 밀레니엄시대를 주도할 핵심분야로 국가경쟁력의 근원이 될 것이다. 과학기술이 낙후되면서 세계시장에서 설자리를 잃게되고 민족의 자부심도 지킬 수 없게 된다. 기존제품을 복사함으로써 개발비를 줄여 이익을 보는 시대는 이미 지나갔다. 새로운 시대를 맞아 과학발전을 위해서는 박사학위를 소지한 고급인력을 기업에서 흡수하여 장치와 부품, 재료에 대한 연구를 기초에서부터 다져 고부가가치를 창출해야 한다. 또 교육도 창의적으로 스스로 생각하는 훈련이 이루어져 독특한 재능을 지닌 과학기술의 탁월한 영재들을 많이 발굴해야 할 것이다.