News tagged with oscillator

Kepler spacecraft takes pulse of distant stars

(PhysOrg.com) -- An international cadre of scientists that used data from NASA's Kepler spacecraft announced Tuesday the detection of stellar oscillations, or "starquakes," that yield new insights about the size, age and ...

Oct 26, 2010
5 / 5 (7) 4 | with audio podcast

The Polaris Cluster

(PhysOrg.com) -- A Cepheid star is one whose mass and age results in physical conditions that generate periodic oscillations in its photosphere. A Cepheid thus varies regularly in brightness, with a period ...

May 28, 2010
5 / 5 (2) 0 | with audio podcast

The shell makes the difference

(PhysOrg.com) -- Contrast echography is a commonly used medical imaging technique that is used to show up abnormal blood circulation in organs and tumours. The method makes use of ultrasound and a contrast ...

Apr 12, 2010
3 / 5 (1) 0