Bratwurst Bucyrus, Ohio (which calls itself the "Bratwurst Capital of America") has held the three-day Bucyrus Bratwurst Festival annually since 1967. Bratwurst Bratwurst () is a type of German sausage made from veal, beef, or most commonly pork. The name is derived from the Old High German "Brätwurst", from "brät-", finely chopped meat, and "Wurst", sausage, although in modern German it is often associated with the verb "braten", to pan fry or roast. While sausage recipes can be found as early as 228 AD, the first documented evidence of the "Bratwurst" in Germany dates to 1313 and can be found in
Slowly varying envelope approximation Slowly varying envelope approximation In physics, the slowly varying envelope approximation (SVEA, sometimes also called slowly varying amplitude approximation or SVAA) is the assumption that the envelope of a forward-travelling wave pulse varies slowly in time and space compared to a period or wavelength. This requires the spectrum of the signal to be narrow-banded—hence it also referred to as the narrow-band approximation. The slowly varying envelope approximation is often used because the resulting equations are in many cases easier to solve than the original equations, reducing the order of—all or some of—the highest-order partial derivatives. But the validity of the