I recently learned Bear blog (a small blogging platform, posts on which often appear on HN) has a “discover” section with a front page style ranking. Their algorithm is on the page
This page is ranked according to the following algorithm:
Score = log10(U) + (S / (B * 86,400))
Where,
U = Upvotes of a post
S = Seconds since Jan 1st, 2020
B = Buoyancy modifier (currently at 14)
