Steve Ives, (who you might know as Flickr user phillytrax), is one of the most frequent and fabulous contributors to the Eyes on the Street Flickr group. He snapped this photo near 17th and Chestnut, ...
Researchers demonstrate a new technique for suppressing back reflections of light, leading to better signal quality for sensing and information technology. Researchers demonstrate a new technique for ...
I SUPPOSE that everyone is familiar with the beautifully graded illumination of a paraffin candle, extending downwards from the flame to a distance of several inches. The thing is seen at its best ...
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