• Title/Summary/Keyword: 보존과학

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Analysis of Changes in Vegetation Index Through Long-term Monitoring of Petroglyphs of Cheonjeon-ri, Ulju (울주 천전리 각석의 장기 모니터링을 통한 식생지수 변화 분석)

  • Ahn, Yu Bin;Yoo, Ji Hyun;Chun, Yu Gun;Lee, Myeong Seong
    • Journal of Conservation Science
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    • v.37 no.6
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    • pp.659-669
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    • 2021

  • In this study, vegetation index, the vegetation index calculated based on hyperspectral images was used to monitor Petroglyphs of Cheonjeon-ri, Ulju from 2014 to 2020. To select suitable the vegetation index for monitoring, indoor analysis was performed, and considering the sensitivity to biocontamination, Normalized Difference Vegetation Index (NDVI) and Triangular Vegetation Index (TVI) were selected. As a result of monitoring using the selected vegetation index, NDVI increased from 2014 to 2018 and then decreased in 2020, after preservation treatment. On the other hand, TVI was difficult to confirm the tendency during the monitoring. This difference was due to the variation in spectral reflectance according to the photographing conditions by year. Therefore NDVI is less sensitive to spectral reflectance deviation than TVI, so it can be used for monitoring. In order for TVI to be used, however, in-depth study is needed.

  • https://doi.org/10.12654/JCS.2021.37.6.05 인용 PDF KSCI

A Study on the Manufacturing and Applicability of Rosin-based Epoxy Adhesives and Filling Material for Conservation of Wood Crafts (목공예품 보존용 송진 기반 에폭시 접착제 및 메움제의 제조와 적용성에 관한 연구)

  • Wi, Koang-Chul;Han, Won-Sik;Oh, Seung-Jun
    • Journal of Conservation Science
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    • v.36 no.6
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    • pp.475-482
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    • 2020

  • In this study, we synthesized rosin-based epoxy resin and manufactured two components adhesives and epoxy putty using this epoxy resin. This study manufactured main element of adhesives for enabling it to form epoxide group by letting epichlorohydrin react to maleic anhydride modified rosin, and used room temperature curing type triethylenetetramine for hardener. The ratio between main element and hardener of of manufactured adhesives was 100 : 20, and main element and hardener of filling material were manufactured as clay type by mixing them with filler. Manufactured undiluted adhesives and filling material showed very stable result in the adhesive strength (3.06 MPa) and ultraviolet irradiation, showing outstanding result comparing to existing restoration adhesives. And it is considered a material having reversibility as it was dissolved in organic solvents such as acetone and toluene after being hardened, which showed a result that solved part of possible problems caused by restoration. As a result of use and application of manufactured adhesives and filling material for actual wood crafts, they showed excellent results in workability, stability, removability etc., and this study confirmed that the material can be used for and applied to various fields.

  • https://doi.org/10.12654/JCS.2020.36.6.03 인용 PDF KSCI

Precise Diagnosis and Conservation Treatment of the Twin-lion Stone Lantern from the Godalsa Temple Site, Yeoju (여주 고달사지 쌍사자 석등의 정밀진단 및 보존처리)

  • National Museum of Korea Conservation Science Division;Damwon Cultural Heritage Inc.;Man Gyeong Corp.
    • Conservation Science in Museum
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    • v.31
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    • pp.71-103
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    • 2024

  • The National Museum of Korea Conservation science division conducted a precise diagnosis and a non-destructive investigation to comprehensively assess the overall damage of the Twin-lion stone lantern from the Godalsa Temple site, Yeoju to be placed on display in the museum's outdoor stone garden, then reviewed the relevant conservation and management plan and applied conservation treatment to the artifact. The museum carried out the treatment in the following order: precise diagnosis; dismantling of the previously-restored part of the roof stone; reinforcement and restoration of the roof structure with new stone; restoration of the previously-restored part of the lantern's support stone (jungseok); surface texture treatment to the restored area; cleaning (basic, laser); and color matching. The previously-restored part of the roof stone was removed and restored with new stone material, based on the results of a safety diagnosis regarding the separation at the said part. Granite from the Sangju area was selected as the material for the restoration in consideration of the results of mineral analysis as well as the surface color and particle size. The new stone was divided into three pieces based on the descending edges of the octagonal roof structure and joined together using epoxy resin. The structure was further strengthened by inserting titanium rods. It is expected that the status diagnosis and conservation treatment of the twin-lion stone lantern from the Godalsa Temple site in Yeoju will be used as a reference for the future conservation and management of outdoor displays of stone cultural heritage.

  • https://doi.org/10.22790/conservation.2024.31.0071 인용 PDF