https://s3.us-east-1.amazonaws.com/libra-easystore-production.lib.virginia.edu/libraetd/nc580n263/1_Murphy_Nicholas_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=20260812T221157Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&x-id=GetObject&X-Amz-Signature=40d8b43b967b93693272a8457852ff9b57a22e4dd66a626806af44385ba7034d