D. R. Kaprekar
Dattaraya Ramchandra Kaprekar (1905–1986) was an Indian recreational mathematician who described several classes of natural numbers including the Kaprekar, Harshad and Self numbers and discovered the Kaprekar constant, named after him. Despite having no formal postgraduate training and working as a schoolteacher, he published extensively and became well known in recreational mathematics circles.
Biography
Kaprekar received his secondary school education in Thane and studied at Fergusson College in Pune. In 1927 he won the Wrangler R. P. Paranjpe Mathematical Prize for an original piece of work in mathematics.
He attended the University of Mumbai, receiving his bachelor's degree in 1929. Having never received any formal postgraduate training, for his entire career (1930–1962) he was a schoolteacher at Nashik in Maharashtra, India. He published extensively, writing about such topics as recurring decimals, magic squares, and integers with special properties. He is also known as "Ganitanand" (गणितानंद)
Déré
Déré is a village in the Sami Department of Banwa Province in western Burkina Faso. As of 2005 it had a population of 608.
References
DR
DR, Dr or dr may refer to:
Technology and science
Companies and products
Darkənd
Darkənd (also, Dər, Dar, and Der) is a village and municipality in the Ordubad Rayon of Nakhchivan, Azerbaijan. It has a population of 484.
References
D&R
D&R electronica Weesp BV is a Dutch company based in Weesp that produces professional audio mixers founded by Duco de Rijk and Ronnie Goene
History
D&R was founded in February 1st 1972 by Duco de Rijk and Ronnie Goene in Weesp the two founders were members of the popular band Zen at the time. Their aim was to design and manufacture affordable and high quality mixing desks. At first the main market were PA mixers. After that, D&R went into the studio recording sector and the world of broadcasting. D&R started in a private address and then moved to a canal side property on the Keizersgracht in Amsterdam and then In 1979, D&R moved to a new location in the west of Amsterdam and again in 1985 to a large building located in Weesp, about 4 km from Amsterdam.
Growth
In 1984, D&R launched the larger in-line mixing consoles. At the time D&R was exporting to 30 countries and the staff grew from 15 to 30 and later on when the staff became consisting of 35 members D&R had to move again to a bigger location so they moved in 1985 to the North industrial estate in Weesp.
Design Research (store)
Design Research or D/R was an innovative retail store founded in 1953 by Ben Thompson in Cambridge, Massachusetts; in the 1970s, under subsequent ownership, it became a chain of a dozen stores across the United States; it went bankrupt in 1978. Thompson's goal was to provide "a place where people could buy everything they needed for contemporary living", notably modern European furnishings and in particular Scandinavian design.
D/R has continued to have an outsized reputation: in 2000, a survey of influential design stores named D/R as number one, though it had been closed for 22 years. It influenced later retailers like Crate & Barrel and Design Within Reach.
Selection of products
Design Research carried an eclectic selection of products, from furniture to clothing, from toys to pots and pans, at a wide range of prices, introducing the idea of a lifestyle store. It carried furnishings by such designers as Marcel Breuer, Hans Wegner, Alvar Aalto, and Joe Colombo.
Design Research was the exclusive U.S. representative for the Finnish clothing and textiles of Marimekko from 1959 to 1976.Jacqueline Kennedy was pictured on the cover of Sports Illustrated in 1960 in a Marimekko sundress purchased at D/R.
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