The earliest example of equine footwear we have is made of animal hide and dates from about 600 B.C. This primitive hoof protector looks more like a horse bootie than what we think of today as a horseshoe. It was probably stuffed with dried grass or other available natural material and tied on with hide thongs.
The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. The spiral model was defined by Barry Boehm in his article A Spiral Model of Software Development and Enhancement from 1985. This model was not the first model to discuss iterative development, but it was the first model to explain why the iteration matters.
âSpiral Jettyâ. Review of Spiral Jetty. The Spiral Jetty is an interesting work of artist Robert Smithson. It is located on the North-Eastern shore of the Great Salt Lake, near Rozel Point (Near Promontory in Box Elder County, Utah, NOT IN SALINA, UTAH.) He created the jetty with basalt rock in 1970. The jetty's visibility depends on the current water level.