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Tuesday, March 27, 2007

Home computer

The home computer is a consumer-friendly word for the second generation of microcomputers, entering the market in 1977 and becoming common during the 1980s.
The home computer became affordable for the general public due to the mass production of the silicon chip based microprocessor and as the name indicates, tended to be used in the home rather than in business/industrial contexts (the name also marks the difference from the first generation of microcomputers (from 1974/75 onwards) which catered mostly to engineers and hobbyists with good soldering skills, as they were often sold as kits to be assembled by the customer). The home computer largely died out at the end of the decade or in the early 1990s (in Europe) due to the rise of the IBM PC compatible personal computer (the IBM PC and its clones are not covered in this article).

Thursday, March 22, 2007

Street light

A street light or street lamp, also well-known as a light standard or lamp standard, is a raised light on the edge of a road, turned on or lit at a convinced time every night. Modern lamps may also have light-sensitive photocells to turn them on at dusk and off at sunrise, or activate automatically in dark weather. It is also not uncommon for street lights to be on posts which have wires strung between them (telephone poles or electrical poles).

Friday, March 16, 2007


A catamaran is a type of boat (or occasionally ship) consisting of two hulls joined by a frame. Catamarans can be sail- or motor-powered. The word catamaran comes from the Tamil language, in which the word kattumaram means "logs bound together". The catamaran was the innovation of the paravas, an aristocratic fishing community in the southern coast of Tamilnadu, India. Catamarans were used by the ancient Tamil Chola dynasty as early as 5th century AD for moving their fleets to conquer such south-east Asian regions as Burma, Indonesia and Malaysia.
Catamarans are a comparatively recent design of boat for both leisure and sport sailing, though they have been used for millennia in Oceania, where Polynesian catamarans allowed seafaring Polynesians to settle the world's most far-flung islands. Catamarans have been met by a degree of scepticism from some sailors accustomed to more "traditional" designs.

Monday, March 12, 2007


Drizzle is quite steady, light precipitation. The drop size of drizzle is smaller than so as to of rain, averaging 0.5 mm in diameter. Though drizzle may be produced by low cumuliform clouds, it is more usually associated with stratiform clouds.
Freezing drizzle occurs when supercooled drops land on a surface whose temperature is below freezing. This occurrence can occur at very low temperatures -- Yellowknife had several hours of freezing drizzle on January 31, 1997 while the temperature remained near -18oC (0oF).

Wednesday, March 07, 2007

Indian Peafowl

The Indian Peafowl, Pavo cristatus also well-known as the Common Peafowl or the Blue Peafowl is one of the species of bird in the genus Pavo of the Phasianidae family known as peafowl. The Indian Peafowl is a resident breeder in eastern Pakistan, India and Sri Lanka. The peacock is the national bird of India.
The species is found in dry semi-desert grasslands, scrub and deciduous forests. It forages and nests on the ground but roosts on top of trees. It eats mostly seeds, but also some insects, fruits and reptiles.
The male is called a peacock, the female a peahen. The Indian Peacock has beautiful iridescent blue-green plumage. The upper tail coverts are very elongated and ornate with an eye at the end of each feather. The female plumage is a mixture of dull green, grey and iridescent blue, with the greenish-grey predominating. In the propagation season, females stand apart by lacking the long tail feathers also known as train and in the non-breeding season they can be distinguished from males by the green colour of the neck as opposite to the blue on the males.
Peafowl are most notable for the male's extravagant tail also recognized as a train, a result of sexual selection, which it displays as part of courtship. This train is in reality not the tail but the enormously elongated upper tail coverts. The tail itself is brown and short as in the peahen.

Friday, March 02, 2007

Computer network

A computer network is two or more computers linked together using a telecommunication system for the purpose of communicating and sharing resources. Experts in the field of networking debate whether two computers that are associated together using some form of communications medium comprise a network. Therefore, some works state that a network requires three connected computers. For example, "Telecommunications: Glossary of Telecommunication Terms" states that a computer network is "A network of data processing nodes that are consistent for the purpose of data communication", the term "network" being defined in the same document as "An interconnection of three or more communicating entities". A computer connected to a non-computing device (e.g., networked to a printer via an Ethernet link) may also correspond to a computer network, although this article does not address this configuration.
This article uses the definition which requires two or more computers to be linked together to form a network. The same basic functions are normally present in this case as with larger numbers of connected computers.