While PIR sensors are inexpensive, radar technologies are decreasing in cost and becoming more compact and simple to design. Radar solutions can range from simple motion detection to complex imaging ...
According to scientific research, outdoor lights can affect plants through photoperiodism. This refers to the way plants react to changes in day length that enables them to adapt to seasonal changes.
The narrow wedge of the zodiacal light (left) reaches nearly to the Milky Way (right) on Nov. 1 from near Kenton, Oklahoma. The zodiacal light stands high in the eastern sky this time of year but ...