The mechanical properties of stone structures are generally characterized according to the strength of the stone used. An ultrasonic velocity method that does not damage cultural heritages is used to measure the strength of stone. However, there is no correction involved for surface roughness and thickness of the stone in the ultrasonic method currently used. In addition, a contact agent such as grease can cause contamination on the surface of a cultural heritage.

• 정태영(정회원 · 대한이엔씨 기업부설연구소 선임연구원, 공학박사) | Chung, Tae-Young
• 곽경헌(정회원 · 대한이엔씨 기업부설연구소 소장, 공학박사) | Kwak, Kyung Hern
• 박주경(정회원 · 대한이엔씨 대표이사, 공학박사/기술사) | Park, Ju-Kyung