Ozone vacuum-ultraviolet (VUV) ozone generators, employ a light source that generates a narrow-band ultraviolet light, a subset of that produced by the Sun. The Sun's UV sustains the ozone layer in the stratosphere of Earth. UV ozone generators use ambient air for ozone production, no air prep systems are used (air dryer or oxygen concentrator), therefore these generators tend to be less expensive. However UV ozone generators usually produce ozone with a concentration of about 0.5% or lower which limits the potential ozone production rate. Another disadvantage of this method is that it requires the ambient air (oxygen) to be exposed
Mover of the Earth, Stopper of the Sun Mover of the Earth, Stopper of the Sun Mover of the Earth, Stopper of the Sun is a concert overture for large orchestra that was commissioned by Orchestre national d'Île-de-France (ONDIF) from composer Svitlana Azarova. The composition is dedicated to Renaissance astronomer Nicolaus Copernicus. The name of this composition was taken from the Nicolaus Copernicus Monument, Toruń which bears a Latin inscription drawn up by Alexander von Humboldt: "Nicolaus Copernicus Thorunensis, terrae motor, solis caelique stator" - "Nicolaus Copernicus of Thorun, mover of the earth, stopper of the sun and heavens" In the score Azarova graphically and musically shows Copernicus’s