https://s3.us-east-1.amazonaws.com/libra-easystore-production.lib.virginia.edu/libraetd/jw827c30n/Comen_Craig_2019_PHD.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Checksum-Mode=ENABLED&X-Amz-Credential=AKIAIKM6AN7XWPD7CIUA%2F20260816%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260816T015756Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&x-id=GetObject&X-Amz-Signature=5fcd3e6ec8615a2b1aa9c3d307e69bf3953f23ae6b8cee7a78c6a234b44a31c5