https://s3.us-east-1.amazonaws.com/libra-easystore-production.lib.virginia.edu/libraetd/9w0323527/1_Lothamer_Heather_2019_PHD.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Checksum-Mode=ENABLED&X-Amz-Credential=AKIAIKM6AN7XWPD7CIUA%2F20260914%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260914T025926Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&x-id=GetObject&X-Amz-Signature=c9a71b91ee5106623d4af717d1df28f6daac8bb822000c3c59f2cb3ca7313046