Index

An index is an indirect shortcut derived from and pointing into a greater volume of values, data, information or knowledge. Index may refer to:

Business

Publishing

Database index

A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of additional writes and storage space to maintain the index data structure. Indexes are used to quickly locate data without having to search every row in a database table every time a database table is accessed. Indexes can be created using one or more columns of a database table, providing the basis for both rapid random lookups and efficient access of ordered records.

An index is a copy of select columns of data from a table that can be searched very efficiently that also includes a low-level disk block address or direct link to the complete row of data it was copied from. Some databases extend the power of indexing by letting developers create indices on functions or expressions. For example, an index could be created on upper(last_name), which would only store the upper case versions of the last_name field in the index. Another option sometimes supported is the use of partial indices, where index entries are created only for those records that satisfy some conditional expression. A further aspect of flexibility is to permit indexing on user-defined functions, as well as expressions formed from an assortment of built-in functions.

Index (statistics)

In statistics and research design, an index is a composite statistic – a measure of changes in a representative group of individual data points, or in other words, a compound measure that aggregates multiple indicators. Indexes summarize and rank specific observations.

Much data in the field of social sciences is represented in various indices such as Gender Gap Index, Human Development Index or the Dow Jones Industrial Average.

Item in indexes are usually weighted equally, unless there are some reasons against it (for example, if two items reflect essentially the same aspect of a variable, they could have a weight of 0.5 each).

Constructing the items involves four steps. First, items should be selected based on their face validity, unidimensionality, the degree of specificity in which a dimension is to be measured, and their amount of variance. Items should be empirically related to one another, which leads to the second step of examining their multivariate relationships. Third, indexes scores are designed, which involves determining their score ranges and weights for the items. Finally, indexes should be validateds, which involves testing whether they can predict indicators related to the measured variable not used in their construction.

Turbo (film)

Turbo is a 2013 American 3D computer-animated comedy sports film produced by DreamWorks Animation and distributed by 20th Century Fox. It is based on an original idea by David Soren, who also directed the film. Set in Los Angeles, the film features an ordinary garden snail whose dream to become the fastest snail in the world comes true. The film was released on July 17, 2013. The film stars the voices of Ryan Reynolds, Paul Giamatti, Michael Peña, Snoop Dogg, Maya Rudolph, Michelle Rodriguez and Samuel L. Jackson.

The film was met with generally positive reviews. Despite earning $282.5 million on a $127 million budget, the studio had to take a total of $15.6 million write-down on behalf of the film. A television series based on the film, titled Turbo FAST (Fast Action Stunt Team), was put into production a year before the film's release, and it first aired on Netflix on December 24, 2013.

Plot

In a suburban San Fernando Valley garden in Los Angeles, Theo, a.k.a. Turbo, is a garden snail who dreams of being the greatest racer in the world, just like his hero, 5-time Indianapolis 500 champ, Guy Gagné. His obsession with speed and all things fast has made him an outcast in the slow and cautious snail community, and a constant embarrassment to his older brother, Chet. Turbo desperately wishes he could escape the slow-paced life he's living, but his one chance to live proves a near fatal disaster when he tries to recover a prize tomato and needs to be rescued by Chet.

Turbo (Czech band)

Turbo is a Czech rock band founded in 1981, which has been described as "legends of Czech rock". Their most popular songs are: „Hráč“, „Chtěl jsem mít“, „Je to jízda“, „Krásným dívkám“, „Přestáváš snít“, „Láska z pasáží“.

Members

Members in 2013

Former members

Discography

Albums

Singles

References

Networker (train)

The Networker is a family of trains which operate on the UK railway system. They were built in the late 1980s and early 1990s by BREL (which became part of ABB in the 1990s). The trains were built for the Network SouthEast sector of British Rail, which is how they get their name. They are all multiple-unit trains.

The Networker design was to become effectively the third generation of British Rail multiple units, and was originally intended to become one of the largest families of trains, bigger even than the largely Mark 3-based Second Generation, and was supposed to cover all the requirements for all future NSE multiple units, but the poor state of the economy in the early 1990s prevented this from happening.

Subsequently Bombardier Transportation has used the Networker as the basis for its successful post-privatisation Turbostar and Electrostar units, having obtained the design through its acquisition of ADtranz which had absorbed ABB.

DMUs

The Turbos were built as a result of electrification not being possible on the lines out of the London terminals, Marylebone and Paddington.