https://s3.us-east-1.amazonaws.com/libra-easystore-production.lib.virginia.edu/libraetd/1v53jx64k/1_Chung_Mihee_2019_PHD.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Checksum-Mode=ENABLED&X-Amz-Credential=AKIAIKM6AN7XWPD7CIUA%2F20260812%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260812T184008Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&x-id=GetObject&X-Amz-Signature=4558a79bf6fe25132e3cf0c0fb89094994181846c69af22bf7960798d8e0e68f