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Book folding is the stage of the book production process in which the pages of the book are folded after printing and before binding. [1] Until the middle of the 19th century, book folding was done by hand, and was a trade. In the 1880s and 1890s, book folding machines by Brown and Dexter came onto the market, and by the 1910s hand-folding was ...
Geometric Folding Algorithms. Geometric Folding Algorithms: Linkages, Origami, Polyhedra is a monograph on the mathematics and computational geometry of mechanical linkages, paper folding, and polyhedral nets, by Erik Demaine and Joseph O'Rourke. It was published in 2007 by Cambridge University Press ( ISBN 978-0-521-85757-4 ).
Iris folding. Birthday card made with iris folding. Iris folding is a paper craft technique that involves folding strips of colored paper in such a way to form a design. The center of the design forms an iris —a shape reminiscent of the iris diaphragm of a camera lens .
In 1949, R C Yeates' book "Geometric Methods" described three allowed constructions corresponding to the first, second, and fifth of the Huzita–Hatori axioms. [6] [7] The Yoshizawa–Randlett system of instruction by diagram was introduced in 1961. [8] Crease pattern for a Miura fold. The parallelograms of this example have 84° and 96° angles.
The Miura fold (ミウラ折り, Miura-ori) is a method of folding a flat surface such as a sheet of paper into a smaller area. The fold is named for its inventor, Japanese astrophysicist Kōryō Miura. [1] The crease patterns of the Miura fold form a tessellation of the surface by parallelograms. In one direction, the creases lie along ...
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...
Washington Express - Washington, D.C.; On September 12, 2019, Express published its last edition. The Epoch Times - Washington DC; The paper, while also offering paid subscriptions, continued to offer papers free at boxes around the city, until August 15, 2019.
Extreme couponing is an activity that combines shopping skills with couponing in an attempt to save as much money as possible while accumulating the most groceries. The concept of "extreme couponers" was first mentioned by The Wall Street Journal on March 8, 2010, in an article entitled "Hard Times Turn Coupon Clipping Into the Newest Extreme Sport". [2]