Wednesday, April 23, 2014
Debate between bird and fish: "The Debate between bird and fish is a literature essay of the Sumerian language, on clay tablets from the mid to late 3rd millennium BC."
Thursday, April 17, 2014
Tuesday, April 15, 2014
Kármán vortex street: "In fluid dynamics, a Kármán vortex street (or a von Kármán vortex sheet) is a repeating pattern of swirling vortices caused by the unsteady separation of flow of a fluid around blunt bodies. It is named after the engineer and fluid dynamicist Theodore von Kármán, and is responsible for such phenomena as the "singing" of suspended telephone or power lines, and the vibration of a car antenna at certain speeds."
Wednesday, April 09, 2014
Avoirdupois: "The avoirdupois system is a system of weights (more properly, mass) based on a pound of 16 ounces. It is the everyday system of weight used in the United States and is still used to varying degrees in everyday life in the United Kingdom, Canada, and some other former British colonies despite the official adoption of the metric system."