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Horseshoe shape is a shape in which the length of the opening is approximately between a third or a quarter of a circle's circumference. [1] It therefore resembles a horseshoe. The shape is sometimes described as keyhole, omega-shaped or moon-like. [2] It occurs most frequently in the horseshoe that gives it its name.
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The mouth of the horseshoe had a post set just inside it, and in the centre of the horseshoe there was a boulder with some burnt bone near it. [2] In the second phase the timber posts were replaced by a horseshoe setting of 8 standing stones, about 8 metres by 6 metres. [2] This was surrounded by a stone bank around 17 metres in diameter. [3]
Hobnailed boots (in Scotland "tackety boots") are boots with hobnails (nails inserted into the soles of the boots), usually installed in a regular pattern, over the sole. They usually have an iron horseshoe-shaped insert, called a heel iron, to strengthen the heel, and an iron toe-piece.
The nailed iron horseshoe first clearly appeared in the archaeological record in Europe in about the 5th century AD when a horseshoe, complete with nails, was found in the tomb of the Frankish King Childeric I at Tournai, Belgium. [9] In Gallo-Roman countries, the hipposandal appears to have briefly co-existed with the nailed horseshoe. [1] [7]
For there he knows the horse-shoe arch At every gate attends him. Nor partridges can he digest, Since the dire horse-shoe on the breast, Most grievously offends him.” [25] The mention of the "horse-shoe arch" likely refers to a horseshoe with its open ends facing downward, consistent with the illustrations found throughout the tale.
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The horseshoe map was designed to reproduce the chaotic dynamics of a flow in the neighborhood of a given periodic orbit. The neighborhood is chosen to be a small disk perpendicular to the orbit . As the system evolves, points in this disk remain close to the given periodic orbit, tracing out orbits that eventually intersect the disk once again.