If you’ve ever been to a concert or sat too close to a loudspeaker, you’ve likely experienced ringing in your ears afterward. But if you often hear a sound that’s in sync with your heartbeat or a ...

Maiken Scott is the host and executive producer of WHYY’s weekly health and science show “The Pulse.” “The Pulse” explores stories about the people and places at the heart of health and science.

Understanding these concepts can help you make smarter financial decisions in the long run and day to day. Many, or all, of the products featured on this page are from our advertising partners who ...

Abstract: As a direct digitized scintillation pulse sampling method, the multi-voltage threshold (MVT) method has gained widespread attention due to its full digitized, accurate sampling advantage, ...

Stratified random sampling - random samples are taken from within certain categories. Stratified systematic sampling - regular samples are taken from within certain categories.