Interweave recently published Kate Atherley's new book, "The beginner's guide to writing knitting patterns." There is such a wealth of material in this book that I have taken a long time to write this ...
(PhysOrg.com) -- Logos and lettering can be written in light using freeform lenses. But how does the surface of the lens have to be structured in order to focus the light in the shape of a specific ...
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