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55: 14.5-31.3: Frequency 55 Toric, Hydrasoft Sphere, Hydrasoft Sphere Thin, Hydrasoft Aphakic, Hydrasoft Aphakic Thin, Hydrasoft Toric, Hydrasoft Toric Thin Vilfilcon A: 55: 16: Focus 1-2 Week Softcolors, Focus Monthly Softcolors, Focus Toric, Focus Progressives, Soft 55, Soft 55 EW
The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...
In electrical engineering and telecommunications the Chu–Harrington limit or Chu limit sets a lower limit on the Q factor for a small radio antenna. [1] The theorem was developed in several papers between 1948 and 1960 by Lan Jen Chu , [ 2 ] Harold Wheeler , [ 3 ] and later by Roger F. Harrington . [ 4 ]
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The manufacture, importation, sale or offer for sale of jamming equipment violates Section 302(b) of the Communications Act of 1934, the FCC says. An FCC representative confirmed Friday that the ...
Time period Key developments at Amazon 1994–1998: Amazon started off as an online bookstore selling books, primarily competing with local booksellers and Barnes & Noble. It IPOs in 1997. 1998–2004: Amazon starts to expand its services beyond books. It also starts offering convenience services, such as Free Super Savers Shipping. 2005–2011
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A fire truck and a police vehicle near an attack during New Year's celebrations, in New Orleans, January 1, 2025. - Octavio Jones/Reuters