Bluetooth is an industrial requirement for wireless personal area networks (PANs). Bluetooth provides a way to connect and swap information between devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency. The Bluetooth specifications are licensed and developed by the Bluetooth Special Interest Group.
Bluetooth is a radio standard and communications protocol mostly designed for low power consumption, with a short range based on low-cost transceiver microchips in each device. The devices use a radio communications system, so they do not have to be in line of view of each other, and can even be in other rooms, as long as the conservative transmission is powerful enough.
Sunday, April 29, 2007
Monday, April 23, 2007
Ocean
Ocean covers almost three quarters of the surface of the Earth, and nearly half of the world's marine waters are over 3000 m deep.
This global, consistent body of salt water, called the World Ocean, is divided by the continents and archipelagos into the following four bodies, from the largest to the smallest: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, and, according to some authorities such as International Hydrographic Organization, a fifth ocean, the Southern Ocean.
Some geographers and some governments but not the US, recognizes the IHO as defining official water body names and boundaries. The IHO officially sanctioned the Southern Ocean name only in 2000, but its definition by a line of latitude has left its acceptance as a fifth ocean open to question. The National Geographic Society and some other leading geographers and cartographers continue to use "South Pacific", "South Atlantic", and "Indian" Ocean for the waters around Antarctica. A few Oceanographers recognize only four oceans also, treating the Arctic Ocean as a part of the Atlantic Ocean.
This global, consistent body of salt water, called the World Ocean, is divided by the continents and archipelagos into the following four bodies, from the largest to the smallest: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, and, according to some authorities such as International Hydrographic Organization, a fifth ocean, the Southern Ocean.
Some geographers and some governments but not the US, recognizes the IHO as defining official water body names and boundaries. The IHO officially sanctioned the Southern Ocean name only in 2000, but its definition by a line of latitude has left its acceptance as a fifth ocean open to question. The National Geographic Society and some other leading geographers and cartographers continue to use "South Pacific", "South Atlantic", and "Indian" Ocean for the waters around Antarctica. A few Oceanographers recognize only four oceans also, treating the Arctic Ocean as a part of the Atlantic Ocean.
Thursday, April 19, 2007
Radio
Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.Radio waves.Radio waves are a form of electromagnetic radiation, formed whenever a charged object accelerates by a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. This is the variety from a few tens of hertz to a few hundred gigahertz.Electromagnetic radio spectrum Other types of electromagnetic radiation, with frequencies above the RF range are infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.Radio transmission diagram and electromagnetic waves.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not need a medium of transport induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. Although the word 'radio' is used to explain this phenomenon, the transmissions which we know as television, radio, radar, and cell phone are all classed as radio frequency emissions.
Tuesday, April 10, 2007
Electric chair
The electric chair was a mechanism commonly used for execution of convicted criminals during the 20th century in the USA. It was first used in the not on time 19th century. It was used by more than 25 states throughout the 20th century, acquiring nicknames such as Sizzlin' Sally, Old Smokey, Old Sparky, Yellow Mama, and Gruesome Gertie. To be put to death in an electric chair is colloquially known as "riding the lightning." Its continued use in the 21st century seems to be quickly on the way out. The electric chair was also used, for a time, in the Philippines.
History
The first practical electric chair was made-up by Harold P. Brown. Brown was an employee of Thomas Edison's, hired for the function of researching electrocution and for the growth of the electric chair. Since Brown worked for Edison, and Edison promoted Brown's work, the development of the electric chair is often incorrectly credited to Edison himself. Brown's design was based on Alternating Current, which was then just emerging as the rival to Edison's less transport-efficient Direct Current, which was further along in commercial progress. The decision to use AC was wholly driven by Edison's attempt to claim that AC was more lethal than DC.
New York State in 1886 recognized a committee to determine a new, more humane system of implementation to replace hanging. Neither Edison nor Westinghouse wanted their electrical system to be selected because they feared that consumers would not want in their homes the same type of electricity used to kill criminals.
In order to prove that AC electricity was superior for executions, Brown and Edison killed many animals, including a circus elephant, while testing out their prototypes. They also held executions of animals for the press in order to ensure that AC current was connected with electrocution. It was at these events that the term "electrocution" was coined. Most of their experiments were conducted at Edison's West Orange, New Jersey, laboratory in 1888.
History
The first practical electric chair was made-up by Harold P. Brown. Brown was an employee of Thomas Edison's, hired for the function of researching electrocution and for the growth of the electric chair. Since Brown worked for Edison, and Edison promoted Brown's work, the development of the electric chair is often incorrectly credited to Edison himself. Brown's design was based on Alternating Current, which was then just emerging as the rival to Edison's less transport-efficient Direct Current, which was further along in commercial progress. The decision to use AC was wholly driven by Edison's attempt to claim that AC was more lethal than DC.
New York State in 1886 recognized a committee to determine a new, more humane system of implementation to replace hanging. Neither Edison nor Westinghouse wanted their electrical system to be selected because they feared that consumers would not want in their homes the same type of electricity used to kill criminals.
In order to prove that AC electricity was superior for executions, Brown and Edison killed many animals, including a circus elephant, while testing out their prototypes. They also held executions of animals for the press in order to ensure that AC current was connected with electrocution. It was at these events that the term "electrocution" was coined. Most of their experiments were conducted at Edison's West Orange, New Jersey, laboratory in 1888.
Friday, April 06, 2007
Sarus Crane
The Sarus Crane is a occupant breeding bird in northern India, Nepal, Southeast Asia and Queensland, Australia. It used to be found on occasion in pakistan, but has not been found sience the late 1980's. It is the world's tallest flying bird.
This is an extremely big crane, 156cm in length, which is found in freshwater marshes and plains. It nests on the ground laying two to three eggs in a large nest. Unlike many cranes that make long migrations the sarus crane does not, meaning it cans expent the energy to raise both chicks. Both the male and female take turns sitting on the nest, and the male is the main guardian.
Adults are grey with a nude red head and white crown and a long dark sharp bill. In flight, the long neck is kept in a straight line, unlike herons, and the black wing tips can be seen; their long red or pink legs trail at the back them.
Sexes are similar, but little birds are duller and browner. The Indian, Southeast Asian and Australian subspecies is different mainly in plumage shade. There are some slight size differences, but on average the male is larger then the female, and the birds are six feet tall with an eight foot wingspan.
These sociable birds forage while walking in shallow water or in fields, sometimes inquisitive with their long bills. They are omnivorous, eating insects, aquatic plants and animals, crustaceans, seeds and berries, small vertebrates, and invertebrates.
The Indian population is about 10,000 birds, and the Australian population of 5,000 birds may be rising, but the Southeast Asian subspecies has been decimated by war and home obliteration.
In Australia, the Sarus can with no trouble be incorrect for the Brolga. The Brolga has a more extensive distribution across the country, and its red coloring is limited to the head. However the brogla and sarus are genetically completely different and the natives of astrillia were aware that they were two different types of bird’s referring to the sarus as the brogla who’s curved in its head in blood.
This is an extremely big crane, 156cm in length, which is found in freshwater marshes and plains. It nests on the ground laying two to three eggs in a large nest. Unlike many cranes that make long migrations the sarus crane does not, meaning it cans expent the energy to raise both chicks. Both the male and female take turns sitting on the nest, and the male is the main guardian.
Adults are grey with a nude red head and white crown and a long dark sharp bill. In flight, the long neck is kept in a straight line, unlike herons, and the black wing tips can be seen; their long red or pink legs trail at the back them.
Sexes are similar, but little birds are duller and browner. The Indian, Southeast Asian and Australian subspecies is different mainly in plumage shade. There are some slight size differences, but on average the male is larger then the female, and the birds are six feet tall with an eight foot wingspan.
These sociable birds forage while walking in shallow water or in fields, sometimes inquisitive with their long bills. They are omnivorous, eating insects, aquatic plants and animals, crustaceans, seeds and berries, small vertebrates, and invertebrates.
The Indian population is about 10,000 birds, and the Australian population of 5,000 birds may be rising, but the Southeast Asian subspecies has been decimated by war and home obliteration.
In Australia, the Sarus can with no trouble be incorrect for the Brolga. The Brolga has a more extensive distribution across the country, and its red coloring is limited to the head. However the brogla and sarus are genetically completely different and the natives of astrillia were aware that they were two different types of bird’s referring to the sarus as the brogla who’s curved in its head in blood.
Monday, April 02, 2007
Delta Air Lines
Delta Air is a major U.S. airline headquartered in Atlanta, Georgia, operating a large domestic and international network that spans North America, South America, Europe, Asia, and the Caribbean.
Delta operates hubs at Atlanta, Cincinnati, New York-JFK, and Salt Lake City. Delta also has great operations in many other cities, including Boston, Columbus, Fort Lauderdale, Los Angeles, New York-LaGuardia, Orlando, and Washington-Reagan. Delta is also the foremost hauler in Florida. Its key worldwide gateways are Atlanta, Cincinnati, and New York-JFK.
In terms of passengers approved, Delta is the second-largest airline in the world. In terms of total operating revenues, Delta is the fourth-largest airline in the world As of September 1, 2005, Delta served 178 domestic cities in 46 states, Puerto Rico, and the U.S. Virgin Islands, as well as 71 international cities, including 10 future ones, in 45 countries.
Early history
Delta timetable from 1934
Delta Boeing 747, operated by Pan Am, at London Heathrow Airport in May 1974.The corporation has its roots in Huff Daland Dusters, which was founded in 1924 in Macon, Georgia by more than a few partners with Collett E. Woolman becoming the world's first aerial crop dusting company. Huff Daland moved to Monroe, Louisiana the following year. In 1928, Huff Daland Dusters was purchased by C.E. Woolman and renamed Delta Air military after the Mississippi Delta, where its route joined Dallas, Texas to Jackson, Mississippi, via Shreveport, Louisiana and Monroe. By 1934, Delta Air began mail service from Charleston to Fort Worth, including Atlanta, Augusta and other stops in Georgia.
In 1941, Delta enthused its headquarters from Monroe to Atlanta, Georgia, to center itself along its new way network that joined Chicago and New Orleans to Florida and Ohio which would later become a Delta hub. In the 1950s, Delta began flights from New Orleans to the Caribbean and Venezuela, becoming the number 2 U.S. carrier in the region after Pan Am and Braniff. On May 1, 1953, Delta combined with Chicago and Southern to enlarge routes in Midwest. In 1955 Delta introduced the "hub and spoke system" where flights are running scared to a central point then sent out to other cities. By the early 1960s, Delta's route network extended to the West Coast, and Dallas was emerging as its second hub city.
Delta operates hubs at Atlanta, Cincinnati, New York-JFK, and Salt Lake City. Delta also has great operations in many other cities, including Boston, Columbus, Fort Lauderdale, Los Angeles, New York-LaGuardia, Orlando, and Washington-Reagan. Delta is also the foremost hauler in Florida. Its key worldwide gateways are Atlanta, Cincinnati, and New York-JFK.
In terms of passengers approved, Delta is the second-largest airline in the world. In terms of total operating revenues, Delta is the fourth-largest airline in the world As of September 1, 2005, Delta served 178 domestic cities in 46 states, Puerto Rico, and the U.S. Virgin Islands, as well as 71 international cities, including 10 future ones, in 45 countries.
Early history
Delta timetable from 1934
Delta Boeing 747, operated by Pan Am, at London Heathrow Airport in May 1974.The corporation has its roots in Huff Daland Dusters, which was founded in 1924 in Macon, Georgia by more than a few partners with Collett E. Woolman becoming the world's first aerial crop dusting company. Huff Daland moved to Monroe, Louisiana the following year. In 1928, Huff Daland Dusters was purchased by C.E. Woolman and renamed Delta Air military after the Mississippi Delta, where its route joined Dallas, Texas to Jackson, Mississippi, via Shreveport, Louisiana and Monroe. By 1934, Delta Air began mail service from Charleston to Fort Worth, including Atlanta, Augusta and other stops in Georgia.
In 1941, Delta enthused its headquarters from Monroe to Atlanta, Georgia, to center itself along its new way network that joined Chicago and New Orleans to Florida and Ohio which would later become a Delta hub. In the 1950s, Delta began flights from New Orleans to the Caribbean and Venezuela, becoming the number 2 U.S. carrier in the region after Pan Am and Braniff. On May 1, 1953, Delta combined with Chicago and Southern to enlarge routes in Midwest. In 1955 Delta introduced the "hub and spoke system" where flights are running scared to a central point then sent out to other cities. By the early 1960s, Delta's route network extended to the West Coast, and Dallas was emerging as its second hub city.
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