& (disambiguation)

&, or ampersand, is a typographic symbol.

& may also refer to:

Tuple

A tuple is a finite ordered list of elements. In mathematics, an n-tuple is a sequence (or ordered list) of n elements, where n is a non-negative integer. There is only one 0-tuple, an empty sequence. An n-tuple is defined inductively using the construction of an ordered pair. Tuples are usually written by listing the elements within parentheses "" and separated by commas; for example, denotes a 5-tuple. Sometimes other symbols are used to surround the elements, such as square brackets "[ ]" or angle brackets "< >". Braces "{ }" are never used for tuples, as they are the standard notation for sets. Tuples are often used to describe other mathematical objects, such as vectors. In computer science, tuples are directly implemented as product types in most functional programming languages. More commonly, they are implemented as record types, where the components are labeled instead of being identified by position alone. This approach is also used in relational algebra. Tuples are also used in relation to programming the semantic web with Resource Description Framework or RDF. Tuples are also used in linguistics and philosophy.

Single (football)

In Canadian football, a single (single point, or rouge), scoring one point, is awarded when the ball is kicked into the end zone by any legal means, other than a successful field goal, and the receiving team does not return, or kick, the ball out of its end zone. It is also a single if the kick travels through the end zone or goes out of bounds in the end zone without being touched, except on a kickoff. After conceding a single, the receiving team is awarded possession of the ball at the 35-yard line of its own end of the field.

Singles are not awarded in the following situations:

In all these cases the defending team is awarded possession of the ball at the 25-yard line.

In the United States, singles are not usually recognized in most leagues and are awarded only in matches played under the auspices of the National Indoor Football League (formerly United Indoor Football) and the now-defunct American Indoor Football Association. It is applied only on kickoffs in both leagues, and is scored if the receiving team fails to advance the ball out of the end zone when kicked. The NIFL also allowed a single to be scored by kicking a kickoff through the uprights (as in a field goal); this type of single is nicknamed (and has since been codified in the NIFL rules as) an uno, from the Spanish word for the number one. At one point, the Philadelphia Public League (the public high school football sanctioning body in Philadelphia, Pennsylvania) awarded three points for kicking a kickoff through the uprights.

Zipp

Zipp is an American company that is best known for designing, manufacturing, and marketing carbon-composite bicycle wheels for road cycling, triathlons, and track racing. The company's product range also includes handlebars, stems, seat posts, tires, inner tubes, handlebar tape, and bags.

History

In 1988, the company was founded by motorsports engineer Leigh Sargent and released its first carbon fiber disc wheel. Zipp was acquired by bicycle component manufacturer SRAM in November 2007. In October 2010, Zipp relocated from its original design and manufacturing facility in Speedway, Indiana to an expanded site in Indianapolis.

Zipp sells spoked wheels, disc wheels, and other products (including stems, seat posts, handlebars, handlebar tape, tires, tubes, and bags) through an international list of authorized dealers. In the early 90's, Zipp built and sold the Zipp 2001, a radical "beam" bike, which has subsequently been discontinued. Zipp also produced mountain bike wheels at its inception, but dropped the program later in favor of a more specialized road line.

Alexander Zippelius

Alexander Zippelius (1797, Würzburg – 31 December 1828, Kupang) was a Dutch horticulturalist and botanical collector in the East Indies.

From 1823 he worked as an assistant curator in the botanical gardens at Buitenzorg, and in 1827 he joined the Natuurkundige Commissie (Commission for Natural Sciences). He collected plants in the Moluccas, southwestern New Guinea and Timor. He died on Timor in 1828.

The botanical genus Zippelia (family Piperaceae) was named in his honor by Carl Ludwig Blume. Also, he is associated with plants having the specific names of zippeliana,zippelii, and zippelianum.

References

External links

Zipp 2001

Zipp 2001 and 3001 were a line of bicycle frames, now discontinued, made by the Zipp company. Though they have been out of production for 7 years, they are still considered one of the fastest time trial frames ever made , and still have a cult following within triathlon, where they remain race-legal .

Theory

The mid-1990s were a fertile time for bicycle designers. New materials (aluminum, carbon fiber) presented new design possibilities, and a number of "non-traditional" designs appeared. While the Zipp 2001 may be one of the better known products, other frames made in this era included Hotta, Softride, Trek's Y-foil, and the Cheetah Cat.

Timeline

The frame that was to become the 2001 was first shown in prototype form in 1990, finalized in 1991, and entered production in 1992. The Zipp 3001 (which was a 2001 with additional boron strips stiffening the carbon fiber) was offered in 1997. 1998, the UCI announced that all non-double diamond frames would be illegal for road racing starting in January 2000. This led Zipp to discontinue production at the end of 1997.