If you celebrate Christmas, nothing hits quite like an Advent calendar to kick off the holiday season. The daily ritual of ...

If the Winter Carnival, USAJPA, and the Minnesota state championship represent the structured, competitive side of speed ...

Abstract: This paper introduces new types of square-piece jigsaw puzzles: those for which the orientation of each jigsaw piece is unknown. We propose a tree-based reassembly that greedily merges ...