nist.gov

3 days ago | nist.gov | Keith Martin

Even if you’ve never learned the first-aid technique CPR, you’ve probably seen it on a TV show or movie and would recognize it happening: A person in medical distress lies on their back while a responder kneels over them, rhythmically pressing their hands into the patient’s chest to keep the heart pumping. Somewhat surprisingly to me, two electrical engineers, one of whom worked here at NIST, helped create the technique we know today as cardiopulmonary resuscitation, or CPR.

2 weeks ago | nist.gov | Zachary Levine

Rubidium vapor cells play a key role in contemporary quantum optics since they have strong nonlinear interactions with low-power incident laser light. The simplest nonlinear interaction is the Kerr effect. Although most calculations concentrate on the unsaturated Kerr effect, the saturated Kerr effect has been measured in many material including 85Rb and 87Rb vapor.

1 month ago | nist.gov | Daniel Eliot

1 month ago | nist.gov | Youngju Kim |Michael Daugherty |Caitlyn M. Wolf |Daniel Hussey

, , , , , , , Daeseung Kim, Seung Wook Lee, Minsoo Han, Hahn Choo, Jongyul Kim, Taejoo Kim Distinguishing differences between authentic artifacts and replicas is a significant challenge in the field of cultural heritage. In this study, we explore the application of neutron grating interferometry and tomography techniques to identify ancient Korean copper-based coins by investigating structural differences between genuine objects and replicas.

1 month ago | nist.gov | Gabriel Popkin

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards and Technology (NIST) campus in Boulder, Colorado. This month, NIST researchers published a journal article establishing NIST-F4 as one of the world’s most accurate timekeepers. NIST has also submitted the clock for acceptance as a primary frequency standard by the International Bureau of Weights and Measures (BIPM), the body that oversees the world’s time.