• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2002.11a
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• pp.223-228
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• 2002

This study is a preference reversal about a policeman image and evaluation by roadside higher stories meeting dwelling pot to the center, and it is an examination, the thing that it analyzed by proposals. Preference anger Was high, and as for the results, the pot which I gave, and bronze was mixed, and formed the skyline with a change appeared with a height and a form of reveal a cross section in meeting dwelling pot star preference evaluation results cluster older brother contrariety. Also, it was arranged the parallel that older brother was parallel in the printing which was monotonous if I wore 1, and the pot that time a little shielding anger was high was evaluated because preference anger was low. Therefore, consideration about a the number of layers interval change must be in order a higher stories meeting dwelling pot reduces that I go for a closing of crossways in the future, and to be able to feel variety with a form enemy.

• Journal of Korea Foundry Society
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• v.20 no.1
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• pp.3-12
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• 2000

The lead content of drinking water has been restricted to less than 15 ppb by Environmental Protection Agency (EPA) in USA. This has led to extensive research and development work at the Materials Technology Laboratory (MTL) of CANMET, a Canadian Government research laboratory, on the development of low-lead and lead-free copper alloys for plumbing applications. Attentionhas also been focused on the environmentally friendly and energy efficient permanent mold casting process to minimize the disposal of foundry sand contaminated by lead due to the use of leaded alloys in the non-ferrous foundries. A new series of alloys called SeBiLOY contaning Bi and Se been introduced to replace lead in the leaded alloys. This paper addresses some important casting characteristics such as fluidity, hot tear resistance, mechanical properties and microstructure of lead-free alloys such as SeBiLOY III and low-lead alloys such as silicon brass, silicon bronze and yellow brass in gravity permanent mold casting.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.07a
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• pp.393-394
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• 2005

SBN25 박막을 씨앗층으로 사용하여 이온빔으로 증착한 SBN60/SBN25 다층박막에 대하여 결정화 및 배향 특성을 고찰하였다. 기판은 Pt(111)/TiO2/SiO2/Si(100) 웨이퍼 (Pt 두께 200nm)를 사용하였으며, 약 3000${\AA}$으로 증착한후 650~$750^{\circ}C$에서 후열처리를 하였다. 제작된 박막의 증착조건 및 열처리 조건에 따른 결정화특성 변화에 대하여 연구하였으며, SBN 박막을 MFM 구조의 박막커패시터로 제조하여 강유전특성을 측정하였다.

• 보존과학연구
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• s.19
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• pp.159-177
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• 1998

Three-story Stone Pagoda(East) on Kamǔnsa temple constructed in A.D. 682 during the reign of King Shinmun-wang of the Unified Shilla period(668~935) was repaired by Cultural Properties Office in 1996. At that time, 27 objectsincluding sari case, small Buddha etc. were excavated. The 26 objects on foundation parts have been treated. Several objects were analyzed by EDXRF. As a result, the small Buddha of gilt bronze was proved to be an gold amalgam. The degree of gold purity was about 22K, and the excellence of gold-refining technique of that day was verified.

• Journal of The Geomorphological Association of Korea
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• v.23 no.2
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• pp.1-13
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• 2016

This study analyzed pollen compositions in archaeological site on alluvial plain of Taehwa River, Taehwa-dong, Ulsan-si vegetational and environmental change during 6,200~3,000 yr BP. The results consist upward of Pollen Zone I (Inner Bay environment), Pollen Zone II (Quercus-Alnus stage) and Pollen Zone III (Alnus stage). The pollen grains of Fagopyrum and reddish gray silty horizon including artifacts of the Bronze Age suggest that there was cultivation on dry-field around the study site, although it is not sure that there was paddy-field cultivation.

• Journal of Powder Materials
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• v.26 no.1
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• pp.28-33
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• 2019

The gas sensor is essential to monitoring dangerous gases in our environment. Metal oxide (MO) gas sensors are primarily utilized for flammable, toxic and organic gases and $O_3$ because of their high sensitivity, high response and high stability. Tungsten oxides ($WO_3$) have versatile applications, particularly for gas sensor applications because of the wide bandgap and stability of $WO_3$. Nanosize $WO_3$ are synthesized using the hydrothermal method. As-prepared $WO_3$ nanopowders are in the form of nanorods and nanorulers. The crystal structure is hexagonal tungsten bronze ($MxWO_3$, x =< 0.33), characterized as a tunnel structure that accommodates alkali ions and the phase stabilizer. A gas detection test reveals that $WO_3$ can detect acetone, butanol, ethanol, and gasoline. This is the first study to report this capability of $WO_3$.

• Journal of Conservation Science
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• v.35 no.1
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• pp.81-89
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• 2019

The extensive archaeological remains at the Baekje Kingdom site of Wanggung-ri, Iksan, in the South Jeolla Province, Korea, include a seventh century workshop area that was later covered by the construction of a Buddhist temple. Remains of glass, gold, and bronze artefacts, and the ceramic crucibles used in the working of these materials, provide evidence for a multi-craft, high-temperature technology. We will report the results of both chemical compositional and lead isotope analyses for Wanggung-ri glass, which is among the earliest lead-silica glass type in East Asia, as well as review the evidence for primary glass production at Wanggung-ri.

• Korean Journal of Heritage: History & Science
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• v.33
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• pp.136-161
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• 2000

This paper is a study on the design of the gilt-bronze sarira caskets discovered in 1959 and 1996, from a east and a west three-story stone pagodas in Gameunsa Temple site which was built in 682. One of the most interesting discoveries is the ceiling with Bokdu(覆斗) design which can be seen in Dun-Huang grotto of China, reflected upon the ceiling structure of the cover (outer casket) and the square box (inner casket). The structure of these sarira caskets, as art crafts, directly represents architectural structure of Dun-Huang grotto that was made during the early T'ang period of China. Moreover, the sarira caskets are decorated with ornate designs and these designs also can be seen on the murals of Dun-Huang grotto. Accordingly, those sarira caskets tell us creative ability and international taste of Silla's craftsmen. By tracing the origin of structure and design pattern of the sarira caskets to Central Asian and Chinese architectures, it is able to understand international style of the sarira caskets of Gameunsa Temple site.

• Journal of architectural history
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• v.30 no.4
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• pp.17-29
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• 2021

Young-dang(影堂) is a ritual pavilion where figures of a dedicated person is enshrined. According to literature, establishment of Young-dang architecture is thought to have the affinity with Buddhist tradition in the beginning of its history. A tradition of enshrining figure could be found especially in Buddhism. Until the mid Joseon dynasty, enshrining figure made of wood, clay and bronze was quite often at Young-dang. In Confucian ritual tradition, a pavilion where enshrining ancestor's sprit tablet called Sadang(祠堂) or Myo(廟). In regarding portrait is a sort of figure, it has to be concerned with Buddhist ritual tradition. For this reaseon, Young-dang started to be distinguished from older aspect of existence in mid Joseon dynasty when the study of Confucian courtesy widely spread. It show the transformation process of Young-dang architecture from Buddhist tradition to Confucian tradition in J oseon dynasty.

• Korean Journal of Metals and Materials
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• v.47 no.9
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• pp.550-557
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• 2009

In this study, bronze or SUS304 powders blended with 10 wt.% diamond particles were used to prepare metal/diamond composite materials deposited by cold spraying. The effects of matrix metal, diamond partical size, and the thickness of the Ni coating on the diamond were studied on Al 6061 substrate. The results showed that the hardness of the metal/diamond composite coating layers was higher than that of the same composite materials when using the sintering method. The fraction of diamond content in the coated layer increased when the metal matrix was soft. When the size of the diamond particles was reduced, the fraction of the diamond particles increased. In addition, in the case of diamond with a thicker Ni-coated layer, the fracturing of diamonds was mitigated in the composite coating layers.