February 27, 2017 2:46 pm
Physicist-turned-chemist Svante Arrhenius led a life of stellar scientific achievement. He was the first Swedish Nobel laureate, winning the prize for chemistry in 1903. Lunar crater Arrhenius is named...
February 27, 2017 2:53 pm
Pyroelectric or passive infrared (PIR) sensors are very efficient for detecting various infrared emissions from a heat source, which allow them to be used for motion detection. Today’s buildings...
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