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This is an extension of the classical optimisation problem for geodesics – minimising the length of a curve [] = + ′ connecting points and , with the added complexity of considering some wind velocity. Although it is usually impossible to find an exact solution in most cases, the general case was solved by Zermelo himself in the form of a ...
Well-known river-crossing puzzles include: The fox, goose, and bag of beans puzzle, in which a farmer must transport a fox, goose and bag of beans from one side of a river to another using a boat which can only hold one item in addition to the farmer, subject to the constraints that the fox cannot be left alone with the goose, and the goose cannot be left alone with the beans.
In the earliest known occurrence of this problem, in the medieval manuscript Propositiones ad Acuendos Juvenes, the three objects are a wolf, a goat, and a cabbage, but other cosmetic variations of the puzzle also exist, such as: wolf, sheep, and cabbage; [4] [2], p. 26 fox, chicken, and grain; [5] fox, goose and corn; [6] and panther, pig, and ...
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However, often sequences of timelines (and streaklines) at different instants—being presented either in a single image or with a video stream—may be used to provide insight in the flow and its history. If a line, curve or closed curve is used as start point for a continuous set of streamlines, the result is a stream surface. In the case of ...
Using a new state law, the Town of Port Royal is pursuing tough new mooring rules to keep derelict boats at bay as it prepares to pour nearly $1 million into building a new shrimp dock.
Walking the boat was a way of lifting the bow of a steamboat like on crutches, getting up and down a sandbank with poles, blocks, and strong rigging, and using paddlewheels to lift and move the ship through successive steps, on the helm. Moving of a boat from a sandbar by its own action was known as "walking the boat" and "grass-hoppering".
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