Knitted red hats have become a form of silent protest for those using handmade crafts as a form of political engagement in opposition to federal immigration policies.
This large Australian light opal cabochon weighs 117.85 carats. Small play-of-color flashes of orange and green predominate in a pinfire pattern, with spots of a more muted blue over a grayish ...
Abstract: This paper presents a method for constructing optimal frequency hopping patterns with ideal autocorrelation and cross-correlation properties based on algebraic Costas arrays. A ...
Our ultimate cheat sheet collection has nuggets of photographic know-how for all user levels and all kinds of photographic interests – and we've even organized them into categories to make them easier ...
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