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
What Does It Take (Dave Days song) to attack the cast and crew, along with himself. The cast fends off the kids, and its down to the boyfriend and Days. An audience member throws Dave his guitar. Dave blocks a hit from a sword the boyfriend is carrying, and knocks him to the ground by hitting him with the head of the guitar while doing a guitar flip. He then takes the sword he had and puts it to his neck while he is on the ground. The audience then claps, and Days and Lynn hug and wave to the crowd. What Does It Take (Dave Days