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Shadoof or shaduf comes from the Arabic word شادوف, šādūf. It is also called a lift, [5] well pole, well sweep, or simply a sweep in the US. [12] A less common English translation is swape. [13] Picotah (or picota) is a Portuguese loan word. It is also called a jiégāo (桔槹) in Chinese.
The first known crane machine was the shaduf, a water-lifting device that was invented in ancient Mesopotamia (modern Iraq) and then appeared in ancient Egyptian technology. Construction cranes later appeared in ancient Greece , where they were powered by men or animals (such as donkeys), and used for the construction of buildings.
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force.
The introduction of this machine had a decisive influence on agriculture as this wheel lifted water 3 to 8 metres with much less labour force and time than the Shaduf, which was the previous irrigation device in the Kingdom. The Shaduf relied on human energy while the saqiya was driven by buffalos or other animals. [20]
Force-directed graph drawing algorithms assign forces among the set of edges and the set of nodes of a graph drawing.Typically, spring-like attractive forces based on Hooke's law are used to attract pairs of endpoints of the graph's edges towards each other, while simultaneously repulsive forces like those of electrically charged particles based on Coulomb's law are used to separate all pairs ...
variables are controlled for.6 In one example of thiskindoftest,tomeasurelinediscrimination, doi: 10.1377/hlthaff.2011.0077 HEALTH AFFAIRS 30, NO. 5 (2011): 852–862 ©2011 Project HOPE— The People-to-People Health Foundation, Inc. Paul Mohai(pmohai@umich.edu) is a professor in the School of Natural Resources and Environment and a faculty
SADT uses two types of diagrams: activity models and data models. It uses arrows to build these diagrams. The SADT's representation is the following: A main box where the name of the process or the action is specified; On the left-hand side of this box, incoming arrows: inputs of the action.
Sargent made several trips to Egypt, Greece and Turkey as part of a project commissioned by the Boston Public Library to explore the origin of Western religion through art. Whilst in Egypt, he created this canvas in 1890–91, depicting a group of locals drinking or collecting water from the Nile which had been raised to the bank by a shaduf. [1]