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Harvey Ball. Harvey Ross Ball (July 10, 1921 – April 12, 2001) was an American commercial artist. He is recognized as the inventor of the popular smiley face graphic picture, which became an enduring and notable international icon. [2] He never applied for a trademark for the iconic smiley image and only earned $45 for his efforts.
Industrial radiography is a modality of non-destructive testing that uses ionizing radiation to inspect materials and components with the objective of locating and quantifying defects and degradation in material properties that would lead to the failure of engineering structures. It plays an important role in the science and technology needed ...
A gamma ray, also known as gamma radiation (symbol. γ. ), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz ( 3 × 1019 Hz) and wavelengths less than 10 ...
The sale of the most inefficient bulbs was phased out. The first types to go were non-clear (frosted) bulbs, which were taken off the market in September 2009. Also from September 2009 clear bulbs over 100 W were made of more efficient types. This limit was moved down to lower wattages, and the efficiency levels raised by the end of 2012.
June 26, 2024 at 9:05 AM. Leonard Ortiz/MediaNews Group/Orange County Register/Getty Images. As Robert F. Kennedy Jr. pushes to gain ballot access in all 50 states, Democrats are ramping up their ...
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