About the Authors

Yongjun Ahn

Affiliation Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea

Hwasoo Yeo

hwasoo@kaist.ac.kr

Affiliation Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YA HY. Performed the experiments: YA HY. Analyzed the data: YA. Contributed reagents/materials/analysis tools: YA HY. Wrote the paper: YA HY.