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Early designs of perpetual motion machines were done by Indian mathematician–astronomer Bhaskara II, who described a wheel (Bhāskara's wheel) that he claimed would run forever. [2] A drawing of a perpetual motion machine appeared in the sketchbook of Villard de Honnecourt, a 13th-century French master mason and architect.
A hamster wheel or running wheel is an exercise device used primarily by hamsters and other rodents, but also by other cursorial animals when given the opportunity. Most of these devices consist of a runged or ridged wheel held on a stand by a single or pair of stub axles. Hamster wheels allow rodents to run even when their space is confined.
Jefferson disk. A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, [ 1] was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet ...
Arilus cristatus. Arilus cristatus, also known as the North American wheel bug or simply wheel bug, [ 1] is a species of large assassin bug in the family Reduviidae and the only species of wheel bug found in the United States. [ 2][ 3] It is one of the largest terrestrial true bugs in North America, reaching up to 1.5 inches (38 mm) in length ...
Brodie knob on an Oliver tractor. Spinner added to the steering wheel of a Rambler Classic. A brodie knob (alternative spelling: brody knob) is a doorknob -shaped handle that attaches to the steering wheel of an automobile or other vehicle or equipment with a steering wheel. Other names for this knob include suicide, necker, granny, knuckle ...
Fitness proportionate selection, also known as roulette wheel selection, is a genetic operator used in genetic algorithms for selecting potentially useful solutions for recombination. In fitness proportionate selection, as in all selection methods, the fitness function assigns a fitness to possible solutions or chromosomes.
Name That Tune returned in 1984 to syndication, again using the $100,000 prize in its branding. Hosted by Jim Lange, this revival was the first syndicated edition of Name That Tune not to air on a weekly basis from the start; instead, the show aired as a daily series with some changes to the format, including the tournament structure. It did ...
List of Ferris wheels. The original Ferris Wheel with a height of 80.4 metres (264 ft) next to the Ain Dubai, the current tallest Ferris wheel, with a height of 250 metres (820 ft). The Ain Dubai can carry 1750 people. The gondolas are each about twice the size of a city bus, and can be reserved for private parties.