https://s3.us-east-1.amazonaws.com/libra-easystore-production.lib.virginia.edu/libraetd/2b88qc72t/1_Tang_James_2019_PHD.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Checksum-Mode=ENABLED&X-Amz-Credential=AKIAIKM6AN7XWPD7CIUA%2F20260818%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260818T201045Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&x-id=GetObject&X-Amz-Signature=6c33dd88a60b8ec0996553d5312cd3afc1c29d4d022548e4d996844882f9b99d