Croydon Airport

Croydon Airport is in south London on the borders of the London Boroughs of Croydon and Sutton. It was once the main airport for London, before it was replaced by Northolt Aerodrome, London Heathrow Airport and London Gatwick Airport.
It originated as two adjacent World War I airfields. Beddington Aerodrome, one of a number of small airfields around London which had been formed for protection against the Zeppelin raids in about May 1915, and Waddon Aerodrome of 1918, a test-flight aerodrome adjoining National Aircraft Factory No1.
At the end of that war, the two airfields were joint into London's official airport as the gateway for all international flights to and from the capital. Croydon Aerodrome opened on 29 March 1920.
It stimulated a increase in regular scheduled flights carrying passengers, mail and freight, the first destinations being Paris, Amsterdam and Rotterdam. In 1923 Berlin flights were added. It was the operating base for Imperial Airways - remembered in the road name Imperial Way on the site today.
In the mid 1920s, the airfield was extended, some adjacent roads being permanently closed to allow heavier airliners to land and depart safely. A new complex of buildings was constructed adjoining Purley Way, including the first purpose-designed air terminal in the world, the Aerodrome Hotel and extensive hangars, all opening on 2 May 1928.
The terminal building, the booking hall inside it with its gallery balustraded in the geometrical design typical of the period, and the Aerodrome hotel were all built in the Art Deco style of the 1920s and 1930s. A further item that caught the eye of visitor and traveller alike was the time zone tower in the booking hall with its dials depicting the times in different parts of the world.
The aerodrome was known the world over, its fame being spread by the many aviators and pioneers who touched down at Croydon.

Longships

Longships, langskip or drakkar were boats used by the Scandinavians and Saxons for their raids on costal and inland settelments. They were the epitome of Scandinavian military power and ranked extremely as precious material possessions.
The longship was a long, narrow, light boat with shallow draft, with oars along approximately the entire length of the boat. Later versions sported a rectangular sail on a single mast to augment the rowers particularly during longer journeys. In combat the variabilily of wind power made rowers the chief means of propulsion. virtually all longships were clinker built and waterproofed by moss drenched in tar. The ship's low mass and shallow keel permitted navigation in waters just 1 meter deep, rapid beaching when landing on beaches, and portage over land.
Construction
Our best evidence for longship building comes from ship-burials. It was common in Viking society for kings to be buried under a long burial mound in a ship with rich possessions. The Oseberg ship burial in Norway and the Anglo Saxon longship of Sutton Hoo in England are both good examples.
Longships were extraordinarily narrow for their length compared to modern standards The main discovered longship (at Roskilde harbor) is 35m in length, and the longship from Hedeby harbour has the largest length/width proportion: 11.4 to 1. However, later longships, optimized for sailing, had lower ratios, often 1 to 7 or even 1 to 5.
In contrast, Scandinavian trade ships or knarrs were built deeper and broader to accommodate bulkier cargo, and were more reliant on sails. A similar relationship may be seen in Mediterranean galleys, which are now and then called longships as well, and their merchant vessels, which were roundships.
Rectangular sails made of wool strengthened by leather were introduced later. Under sail, longships were very fast, achieving speeds of 14 knots. They were also extremely seaworthy, but, being essentially open boats, not very habitable. However, this did not stop early Scandinavian explorers from discovering and settling in Iceland, Greenland, and Canada, all well before Christopher Columbus landed in the Bahamas in 1492.

Bell Telephone Company

Bell and others formed the Bell Telephone Company in July 1877. In 1879, it merged with the New England Telephone Company forming the National Telephone Company, which was renamed the American Bell Telephone Company in 1880. Along with Thomas Edison, Bell formed the Oriental Telephone Company on January 25, 1881. On March 3, 1885, American Telephone and Telegraph Company (AT&T) was formed to supervise the expanding long-distance business of the American Bell Telephone Company. AT&T became the overall investment company for all the Bell ventures, and remains active today.

Lake effect snow

Lake effect snow, which can be a kind of snowsquall, is produced in the winter when cold, arctic dry winds move across long expanses of warmer lake water, picking up water vapor which freezes and is deposited on the lee shores. This effect is improved when the moving air mass is uplifted by the orographic effect of higher elevations on the downwind shores. This uplifting can produce narrow, but very intense bands of precipitation, which deposit at a rate of many inches of snow each hour and often bringing copious snowfall totals. The areas affected by lake effect snow are called snowbelts. This effect occurs in many locations throughout the world, mostly in the Northern Hemisphere, but is best known in the populated areas of the Great Lakes of North America. The lake effect from the Great Salt Lake in Utah helps to create "The Greatest Snow on Earth". Since the Great Salt Lake never freezes, the lake effect can affect the weather along the Wasatch front year around.

If the air temperature is not low enough to keep the precipitation frozen, it falls as lake effect rain. In order for lake effect rain or snow to form, the moving air must be cooler and also less humid than the surface air. specially, the air temperature should be 15 to 25°C cooler than the water, and the dew point at the altitude where the air pressure is 850 mb should be 13°C lower than the dew point of the air at the surface. Lake effect of very cold air over still warm water in early winter can produce thundersnow, snow showers accompanied by lightning and thunder.

Chamundi Hills

The Chamundi Hills are situated in India, close to the palace city of Mysore. Its average elevation is 1,000 meters.
Legend has it that that the demon Mahishasura, the king of the area that is currently Mysore, was killed by the Goddess Chamundeswari (also Chamundi) after a fierce battle. The hills therefore got their name and a temple of the Goddess was built on the top. The temple has a very beautiful Idol of the Goddess tiring a garland of skulls. The temple has always been patronised by the rulers of Mysore. In earlier days, the Maharajas of Mysore would ride the ceremonial Dasara elephant during the annual Dasara festival, but after India gained independence, the Idol of Goddess Chamundi is taken on an elephant.
A panoramic view of the city is seen from the top of the hills. Among other landmarks, you can see the Race Course, the Lalitha Mahal palace, the Mysore Palace, the Karanji and Kukkarahalli lakes. At dusk, the view of the city is particularly beautiful, and on Sunday evenings and during the Dasara festival, the illuminated Mysore Palace glitters like gold.
There are steps important to the top of the hill. There are around 1,000 steps in all, and climbing the first 400 or so steps takes some effort. Enroute to the top, the steps pass the large monolithic statue of Nandi the Bull. Nandi is the vahana (Vehicle) of Lord Shiva. Climbing gets easier soon afterwards.
There are regular buses plying to the Chamundi hills from the central bus stand.
The top of the hill has a few attractions - the Mahishasura Statue, the Chamundeswari Temple, and a few other temples nearby. The Rajendra Vilas palace used to be a popular hotel earlier, but is now closed to the public. The palace is now being redone and provides a panaromic view of the Hill, Chamundi Temple and Mysore City.
Mysore got its name from the demon Mahishasura. It was earlier known as 'Mahisuru,' meaning Mahisha's city. slowly it came to be called Mysooru and later anglicised to Mysore. There is a demand and proposal of late that the name of city be changed from Mysore to Mysooru the original Indian form.

Classification of Integrated circuits

Integrated circuits can be classified into analog, digital and mixed signal (both analog and digital on the same chip).
Digital integrated circuits can have anything from a few thousand to millions of logic gates, flip-flops, multiplexers, and other circuits in a few square millimeters. The small size of these circuits allows high speed, low power dissipation, and reduced manufacturing cost compared with board-level integration. These digital ICs, classically microprocessors, DSPs, and micro controllers work using binary mathematics to process "one" and "zero" signals.
Analog ICs, such as sensors, power management circuits, and operational amplifiers, work by giving out continuous signals. They carry out functions like amplification, active filtering, demodulation, mixing, etc. Analog ICs ease the burden on circuit designers by having expertly designed analog circuits available instead of designing a hard analog circuit from scratch.
ICs can also combine analog and digital circuits on a single chip to generate functions such as A/D converters and D/A converters. Such circuits offer smaller size and lower cost, but must carefully account for signal interference