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Proportional Compass
The sector, also known as a proportional compass or military compass, was a major calculating instrument in use from the end of the sixteenth century until the nineteenth century. It is an instrument consisting of two rulers of equal length joined by a hinge. A number of scales are inscribed upon the instrument which facilitate various mathematical calculations. It was used for solving problems in proportion, multiplication and division, geometry, and trigonometry, and for computing various mathematical functions, such as square roots and cube roots. Its several scales permitted easy and direct solutions of problems in gunnery, surveying and navigation. The sector derives its name from the fourth proposition of the sixth book of Euclid, where it is demonstrated that similar triangles have their like sides proportional. Some sectors also incorporated a quadrant, and sometimes a clamp at the end of one leg which allowed the device to be used as a gunner's quadrant. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compas De Proportion 1
Compas, also known as compas direct or compas direk (; Haitian Creole: ''konpa'', ''kompa'' or ''kompa dirèk''), is a modern méringue dance music genre of Haiti. The genre was popularized following the creation of Ensemble Aux Callebasses in (1955), which became Ensemble Nemours Jean-Baptiste In 1957. The frequent tours of the many Haitian bands have cemented the style in all the Caribbean. Therefore, compas is the main music of several countries such as Dominica and the French Antilles. Whether it is called zouk, where French Antilles artists of Martinique and Guadeloupe have taken it, or compas in places where Haitian artists have toured, this méringue style is influential in part of the Caribbean, Portugal, Cape Verde, France, part of Canada, South America, South and North America. Etymology and characteristics The word "Compas" means "measure" in Spanish or "rhythm", and one of the most distinctive characteristics of compas is the consistent pulsating tanbou beat, a tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
