Anemometer turbines usually requires a refresh rate of wind speed measurements of 3 Hz, easily achieved by sonic anemometers. Three-dimensional sonic anemometers are widely used to measure gas emissions and ecosystem fluxes using the eddy covariance method when used with fast-response infrared gas analyzers or laser-based analyzers. Two-dimensional wind sensors are of two types: Acoustic resonance anemometers are a more recent variant of sonic anemometer. The technology was invented by Dr Savvas Kapartis and patented in 2000. Whereas conventional sonic anemometers rely on time of flight measurement, acoustic resonance sensors use resonating acoustic (ultrasonic) waves within a small purpose-built cavity in
2008 Oregon Ballot Measure 58 2008 Oregon Ballot Measure 58 Oregon Ballot Measure 58 was an initiated state statute ballot measure sponsored by Bill Sizemore that appeared on the November 4, 2008 general election ballot in Oregon. It was rejected by voters. The initiative would have required "English immersion" in Oregon's public schools. "English immersion" wasn't defined in the measure, and there is no academic consensus as to what it means. Here is how Oregon's major newspapers endorsed on the measure: No Oregon newspapers have endorsed a yes vote on Measure 58. The measure would limit the use of foreign language instruction in public schools