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In North America, the rings themselves come in a variety of sizes, including 0.5, 1, 1.5, and 2 inches (13, 25, 38, and 51 mm), though other sizes are also available. The rings may be secured by lever arch [1] mechanisms or other securing systems. The binders themselves are typically made from plastic with metal rings.
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The on-line textbook: Information Theory, Inference, and Learning Algorithms, by David J.C. MacKay, contains chapters on elementary error-correcting codes; on the theoretical limits of error-correction; and on the latest state-of-the-art error-correcting codes, including low-density parity-check codes, turbo codes, and fountain codes.
A low code-rate close to zero implies a strong code that uses many redundant bits to achieve a good performance, while a large code-rate close to 1 implies a weak code. The redundant bits that protect the information have to be transferred using the same communication resources that they are trying to protect.
On August 28, 2009, SquareTrade published a report saying that "early indications point to the RROD problem abating in 2009", projecting that 1-year failure rates with the release of the Jasper chipsets might be below 4%, with actual fail rates for RROD problems at slightly above 1% in Q109, and total failure rates for all hardware problems at ...
1.7 01 February 1998 SGML DTD 1.7.1 dated 2 July 1998 (introduces IPRF DTD) 1.8 31 January 1999 SGML DTD 1.8.1 dated 31 May 2000 (various DTD changes) 1.9 01 April 2001 SGML/XML DTD 2.0 31 May 2003 SGML/XML DTD, XML schema There is a patch folder, but no official numbered patch and it only contains an updated data dictionary. 2.1 29 February 2004
If hard covers are desired, they must be punched as well. In bulk applications, a paper drilling machine may be used. Then the user chooses a spine size that will match the document. Standard sizes are 4.8 mm (3 ⁄ 16 in) (for 16 sheets of 20# paper) up to 51 mm (2 in) (for 425 sheets). Spine lengths are generally 280 mm (11 in) to match the ...