Create an adorable crochet butterfly keychain that’s perfect for bags, keys, and cute handmade gifts. This beginner-friendly ...

This crochet pizza keychain pattern and tutorial is a fun, beginner-friendly project with clear steps and simple stitches. Create a cute, colorful mini pizza that’s perfect for keys, bags, or as a ...

Abstract: Zone plate test images have been used in image processing and television for some time. In this paper the concept is generalized to a vector zone plate, which proves to be a useful test ...