Daegokcheon Stream in Daegok-ri, Ulju-gun, is an area with a developed valley and bedrock from Gajisan Provincial Park to the confluence of the Taehwa River across the Yangsan Fault. To measure the rock of Bangudae petroglyphs, the mineralogical weathering, joints, and scours or cavities at the bottom were confirmed. The measurement was carried out for a short period of time on the joint of the bedrock on which the Bangudae petroglyphs were engraved. Compared to the measured value obtained using existing optical fiber (Ch4 150 µm), a displacement value of 300 µm was obtained using the non-attached, non-contact type of measuring instrument. In the future, it is inferred that this instrument could be used for various cultural properties if the HSV-value suitable for illuminance and various measurement experiences are stored.

This study aims to investigate the corrosion characteristics of bronze artifacts according to lead contents by conducting a comprehensive analysis on corrosion layers and corrosion products focusing on excavated bronze artifacts of ternary alloys with various chemical compositions.</br>From the research outcome, the selective corrosion, high-tin corrosion layers, and lead compounds were identified in two excavated bronze artifacts, and there was a difference in the structure of corrosion layers and the corrosion products of core metal between high lead content bronze and the lowest lead content bronze. Especially, based on the specimen with the highest lead content, it was identified that lead oxide in reddish color and a large quantity of lead corrosion products including lead carbonate in various colors such as white, red, yellow, and green are distributed inside the base metal.</br>In this study, the number of analyzed samples is insufficient to represent the corrosion characteristics of bronze artifacts made of the ternary alloys. Therefore, it is judged that basic data should be accumulated by conducting a corrosion characteristic study on bronze artifacts with various alloy composition ratios in the future.

This study aims to provide basic data for actual heritage conservation areas by suggesting the reuse method of materials from wooden historic buildings. This research may contribute to an increase in the utilization of materials for stabilizing the structure of wooden historic buildings. The data were collected by applying heating, tapping, and heat treatment based on the pattern and extent of the damage of iron nails acquired from wooden historic buildings. To make a comparison before and after processing, morphological characteristics and physical properties were measured using a metallurgical analysis. According to these data, we can infer that the possibility of reuse of historic iron materials could be raised in the restoration process of historic buildings such as existing building components and roof tiles. If the research is to move forward, authenticity will be fostered in architectural heritage conservation.