https://guides.temple.edu/az/databases
Case Files Collection offers the best-selling Case Files content in an interactive format. This collection features: the complete collection of basic science, clinical medicine, and post-graduate level cases from 23 Case Files series books; an interactive format; and personalized functionality to let users mark their progress through completed and unseen cases.
https://cis.temple.edu/~latecki/Courses/CIS601-04/ProjectPapers/shapeRepPR04.pdf
Let L be the maximum radius of the shape S to be described, Ck, be the kth ring of n concentric rings obtained by sectioning the maximum radius L into n equal segments.