The Asian Paradise Flycatcher, also known as the Common Paradise Flycatcher, is a medium-sized passerine bird. It was before classified with the Old World flycatcher family Muscicapidae, but the paradise flycatchers, monarch flycatchers and Australasian fantails are now usually grouped with the drongos in the family Dicruridae, which has most of its members in Australasia and steamy southern Asia.
The Asian Paradise Flycatcher breeds from Turkistan to Manchuria. It is migratory, wintering in steamy Asia. There are occupant populations further south, for example in southern India and Sri Lanka, so both visiting migrants and the locally breeding subspecies occur in these areas in winter.
This species is usually found in thick forests and other well-wooded habitats. Three or four eggs are laid in a cup nest in a tree.
The adult male Asian Paradise Flycatcher is about 20 cm long, but the long tail bunting double this. It has a black crested head, chestnut upperparts and pale grey underpants.
By their second year, the males of the migratory Indian race T. p. paradise begin to obtain white feathers. By the third year, the male plumage is completely white, other than the black head. Males of the sedentary Sri Lankan race T. p. Ceylonese’s are always chestnut.
The female of all races resembles the old joke male, but has a grey throat, smaller crest and lacks the tail streamers.
Sunday, April 29, 2007
Monday, April 23, 2007
Brown Thrasher
The Brown Thrasher is a common type of thrasher, part of a family of New World birds that includes New World catbirds and mockingbirds.The Brown Thrasher is, as the name suggests, mostly brown or reddish-brown on top of, with a white breast and throat streaked with brown, and two white bars on each wing. It has a long tail, and its beak is also relatively large and somewhat curved. Adults average about 29 cm (11.5 in) in length.
It is difficult to see all this however, as the bird is a retiring type that prefers thickets and heavy brush, often searching for food in dry leaves on the ground. In fact, it is more probable to be heard than seen, not only because of the rattling of leaves, but also because of its call, a sharp lip-smacking type sound. This bird is omnivorous, eating insects, berries, nuts and seeds, as well as earthworms, snails and sometimes lizards.Its breeding variety includes the United States and Canada east of the Rocky Mountains. It is a partial migrant, with northern birds wintering in the southern USA, where it occurs all through the year. There is a single British record of this unlikely transatlantic vagrant.The female lays 3 to 5 eggs in a twiggy nest lined with grass. The nest is built in a dense shrub or low in a tree. Both parents incubate and feed the young. These
birds raise two, rarely three, broods in a year. The male sings a series of short recurring melodious phrases from an open perch to defend his territory and is also very aggressive in defending the nest.Although this bird is widespread and still common, it has declined in numbers in some areas due to loss of suitable habitat.The Brown Thrasher is the official state bird of Georgia, and the inspiration for the name of Atlanta's National Hockey League team, the Atlanta Thrashers.
It is difficult to see all this however, as the bird is a retiring type that prefers thickets and heavy brush, often searching for food in dry leaves on the ground. In fact, it is more probable to be heard than seen, not only because of the rattling of leaves, but also because of its call, a sharp lip-smacking type sound. This bird is omnivorous, eating insects, berries, nuts and seeds, as well as earthworms, snails and sometimes lizards.Its breeding variety includes the United States and Canada east of the Rocky Mountains. It is a partial migrant, with northern birds wintering in the southern USA, where it occurs all through the year. There is a single British record of this unlikely transatlantic vagrant.The female lays 3 to 5 eggs in a twiggy nest lined with grass. The nest is built in a dense shrub or low in a tree. Both parents incubate and feed the young. These
birds raise two, rarely three, broods in a year. The male sings a series of short recurring melodious phrases from an open perch to defend his territory and is also very aggressive in defending the nest.Although this bird is widespread and still common, it has declined in numbers in some areas due to loss of suitable habitat.The Brown Thrasher is the official state bird of Georgia, and the inspiration for the name of Atlanta's National Hockey League team, the Atlanta Thrashers.
Wednesday, April 18, 2007
Street racing
Street racing is a form of auto racing that takes place on public roads, either through normal traffic or during empty hours of traffic, often inside the industrial areas of cities. It is illegal, as such driving is prohibited by many traffic regulations. Law enforcement officers attempt to stop these races, but because of the frequency of them, most of the time, the racers also are not caught or they get away. Speeds in an illegal street race can reach over 180 miles per hour and crashes can and do occur.
Monday, April 09, 2007
Transistor
The transistor is a solid state semiconductor device which can be used for amplification, switching, voltage stabilization, signal modulation and many other functions. It acts as a variable valve which, based on its input current (BJT) or input voltage (FET), allows a precise amount of current to flow through it from the circuit's voltage supply.
In essence, a transistor have three terminals. A current or voltage applied through/across two terminals controls a larger current through the other terminal and the common terminal. In analog circuits, transistors are used in amplifiers. Analog circuits comprise audio amplifiers, stabilised power supplies and radio frequency amplifiers. In digital circuits, transistors function basically as electrical switches. Digital circuits include logic gates, RAM (random access memory) and microprocessors.
Transistor was also the common name in the sixties for a transistor radio, a portable radio that used transistors (rather than vacuum tubes) as its active electronic components. This is still one of the dictionary definitions of transistor.
In essence, a transistor have three terminals. A current or voltage applied through/across two terminals controls a larger current through the other terminal and the common terminal. In analog circuits, transistors are used in amplifiers. Analog circuits comprise audio amplifiers, stabilised power supplies and radio frequency amplifiers. In digital circuits, transistors function basically as electrical switches. Digital circuits include logic gates, RAM (random access memory) and microprocessors.
Transistor was also the common name in the sixties for a transistor radio, a portable radio that used transistors (rather than vacuum tubes) as its active electronic components. This is still one of the dictionary definitions of transistor.
Thursday, April 05, 2007
Artistamp
Artistamp refers to a postage stamp-like artform. It is like to a Cinderella stamp, in that it is not valid for postage, but it differs from a forgery or a bogus stamp in that (typically) no intention is made to fool any post office or collector of stamps. The artistamp is intended to be a miniature artform which can depict or commemorate any subject its creator chooses.
Techniques for the creation of artistamps may or may not comprise perforating the boundaries of the piece to more resemble a (water-activated) stamp, as well as applying gum to the reverse side of the paper. (Self-adhesive artistamps have also been made, however, and indeed artistamps have been issued in practically every format in which postage stamps have been—including souvenir sheets, and perhaps more.) Whole sheets of such stamps are often made at one time. The artwork can be hand-drawn or painted, lithographed or offset-printed, photographed, xeroxed, rubber stamped, or even output by computer-driven printer.
Techniques for the creation of artistamps may or may not comprise perforating the boundaries of the piece to more resemble a (water-activated) stamp, as well as applying gum to the reverse side of the paper. (Self-adhesive artistamps have also been made, however, and indeed artistamps have been issued in practically every format in which postage stamps have been—including souvenir sheets, and perhaps more.) Whole sheets of such stamps are often made at one time. The artwork can be hand-drawn or painted, lithographed or offset-printed, photographed, xeroxed, rubber stamped, or even output by computer-driven printer.
Sunday, April 01, 2007
Rail transport
A railroad or railway is a guided means of land transport, intended to be used by trains, for transporting both passengers and freight. It consists of two parallel rails, usually made of steel, and wooden or concrete sleepers or ties that hold the rails precisely at the proper distance from each other. See Rail tracks
Rail transport is one of the most energy well-organized means of mechanised land transport known. The rails give very smooth and hard surfaces on which the wheels of the train may roll with a minimum of friction. This is more comfortable and saves energy. Trains also have a small frontal area in relation to the load they are carrying, which cuts down on air resistance and thus energy usage. In all, under the right circumstances, a train needs 50-70% less energy to transport a given tonnage of freight, than by road. Furthermore, together with the sleepers the rails share out the weight of the train evenly, allowing significantly greater loads per axle/wheel than in road transport.
Rail transport is also one of the safest modes of transport, and also makes a very efficient use of space: a double tracked rail line can carry more passengers or freight in a given amount of time, than a four-laned road.
Rail transport is one of the most energy well-organized means of mechanised land transport known. The rails give very smooth and hard surfaces on which the wheels of the train may roll with a minimum of friction. This is more comfortable and saves energy. Trains also have a small frontal area in relation to the load they are carrying, which cuts down on air resistance and thus energy usage. In all, under the right circumstances, a train needs 50-70% less energy to transport a given tonnage of freight, than by road. Furthermore, together with the sleepers the rails share out the weight of the train evenly, allowing significantly greater loads per axle/wheel than in road transport.
Rail transport is also one of the safest modes of transport, and also makes a very efficient use of space: a double tracked rail line can carry more passengers or freight in a given amount of time, than a four-laned road.
Tuesday, March 27, 2007
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.
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.
Thursday, March 22, 2007
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.
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.
Friday, March 16, 2007
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.
Monday, March 12, 2007
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.
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.
Wednesday, March 07, 2007
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.
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.
Friday, March 02, 2007
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
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
Monday, February 26, 2007
lollipop
A lollipop, or lolly, is a type of confectionery consisting mostly of hardened, flavoured sucrose with corn syrup mounted on a stick and intended for sucking or licking. In many regions of the United States, the term "sucker" is used interchangeably with or instead of "lollipop". In these areas, the term "lollipop" is frequently applied to candy that is disc-shaped, while "sucker" is applied to candy that is spherical. Lollipops come in a variety of flavors from cherry, grape and orange to watermelon and green apple. In Europe, particularly the Nordic countries, Germany and the Netherlands, salmiakki-flavoured lollipops are also available, but these are largely unknown to the USA. With numerous companies producing lollipops, the candy now comes in dozens of flavors.
They were first commercially manufactured on a large scale in the 1920s. Some lollipops contain fillings, such as bubble gum or Tootsie Rolls. Notable brand names include Chupa Chups and DumDums.
The origin of the lollipop has yet to be determined. Both Racine, Wisconsin and San Francisco, California, claim that they made the first automatic lollipop maker
They were first commercially manufactured on a large scale in the 1920s. Some lollipops contain fillings, such as bubble gum or Tootsie Rolls. Notable brand names include Chupa Chups and DumDums.
The origin of the lollipop has yet to be determined. Both Racine, Wisconsin and San Francisco, California, claim that they made the first automatic lollipop maker
Wednesday, February 21, 2007
Bone
Bones are rigid organs that figure out the part of the endoskeleton of vertebrates. Bones job to move, support, and protect the body, produce red and white blood cells and store minerals. Bones come in a variety of shapes and have a complex internal and external structure, allowing them to be lightweight yet strong and hard, while fulfilling their many other functions. One of the types of tissues that makes up bones is the mineralized osseous tissue, also called bone tissue, that gives bones their rigidity and honeycomb-like three-dimensional inside structure. Other tissue types found in bones include marrow, the periosteum, nerves, blood vessels and cartilage.
There are five main functions of bones.
* Protection — Bones can serve to protect internal organs, such as the skull protecting the brain or the ribs protecting the abdomen.
* Shape — Bones provide a frame to keep the body supported.
* Blood production — The marrow, located within the medullary cavity of long bones and the interstices of cancellous bone, produces blood cells in a process called haematopoiesis.
* Mineral storage — Bones act as reserves of minerals important for the body, most notably calcium and phosphorus.
* Movement — Bones, skeletal muscles, tendons, ligaments and joints function together to generate and transfer forces so that individual body parts or the whole body can be manipulated in three-dimensional space. The interaction between bone and muscle is studied in biomechanics.
There are five main functions of bones.
* Protection — Bones can serve to protect internal organs, such as the skull protecting the brain or the ribs protecting the abdomen.
* Shape — Bones provide a frame to keep the body supported.
* Blood production — The marrow, located within the medullary cavity of long bones and the interstices of cancellous bone, produces blood cells in a process called haematopoiesis.
* Mineral storage — Bones act as reserves of minerals important for the body, most notably calcium and phosphorus.
* Movement — Bones, skeletal muscles, tendons, ligaments and joints function together to generate and transfer forces so that individual body parts or the whole body can be manipulated in three-dimensional space. The interaction between bone and muscle is studied in biomechanics.
Thursday, February 15, 2007
Udhagamandalam-Tourism
Udhagamandalam Located in the mountainous range called the Blue Mountains or Nilgiris, Ooty draws a very large number of tourists every year. The weather is quite pleasurable at a mean of 15 to 20 °C (59 to 68 °F) year round, reducing to lows of 0 °C (32 °F) during winter. The hill town suffers from rampant commercialization and erosion of natural resources. The tourism industry has located an enormous strain on the natural resources resulting in pollution, a water shortage, and bad roads. The number of visitors was 1,681,000 in 2001, 1,834,000 in 2003, and h 1,725,000 in 2005.
The landscape is relatively unlike the rest of India, marked by continuing hills and plateaus covered with dense vegetation, tea gardens, and eucalyptus trees. Many portions of the hills are conserved as natural reserve forests, and special permits are needed to camp outside of campgrounds. Ooty is not the destination in itself, as much as it is the main point of attraction. Auto touring the neighboring countryside is a favourite activity.
The hilly region also houses smaller town like Coonoor and Kotagiri. These towns are less than an hour's drive away from Ooty and have the same climate, but have fewer tourists and cheaper prices.
The landscape is relatively unlike the rest of India, marked by continuing hills and plateaus covered with dense vegetation, tea gardens, and eucalyptus trees. Many portions of the hills are conserved as natural reserve forests, and special permits are needed to camp outside of campgrounds. Ooty is not the destination in itself, as much as it is the main point of attraction. Auto touring the neighboring countryside is a favourite activity.
The hilly region also houses smaller town like Coonoor and Kotagiri. These towns are less than an hour's drive away from Ooty and have the same climate, but have fewer tourists and cheaper prices.
Friday, February 09, 2007
Jewellery
Jewellery is factually any piece of fine material used to decorate oneself. Although in earlier times jewellery was created for more convenient uses, such as wealth storage and pinning clothes together, in recent times it has been used almost completely for beautification. The first pieces of jewellery were made from likely materials, such as bone and animal teeth, shell, wood and engraved stone. Jewellery was often made for people of high importance to show their status and, in many cases, they were covered with it.Jewellery is made out of almost every material recognized and has been made to garnish nearly every body part, from hairpins to toe rings and many more types of jewellery. While high-quality and artistic pieces are made with gemstones and valuable metals, less pricey costume jewellery is made from less-valuable materials and is mass-produced.Form and function Kenyan man exhausting tribal beads.Over time, jewellery has been used for a number of reasons: Currency, wealth display and storage, purposeful Symbolism Protection and Artistic display Most cultures have at some point had a practice of observance large amounts of wealth stored in the form of jewellery. Numerous cultures move wedding dowries in the form of jewelry, or create jewelry as a means to store or display coins. on the other hand, jewellery has been used as a currency or trade good; a mostly poignant example being the use of slave beads.
In creating jewellery, a variety of gemstones, coins, or other valuable items can be used, often set into precious metals. Common expensive metals used for modern jewellery include gold, platinum or silver, although alloys of nearly every metal known can be encountered in jewellery -- bronze, for example, was common in Roman times. Most gold jewellery is made of an alloy of gold, the purity of which is affirmed in karats, indicated by a number followed by the letter K. For example, ordinary gold jewellery ranges from 10K (41.7% pure gold) to 22K (91.6% pure gold), while 24K (99.9% pure gold) is considered too soft for jewellery use. Platinum alloys variety from 900 (90% pure) to 950 (95.0% pure). The silver used in jewellery is usually sterling silver, or 92.5% fine silver.Other generally used materials include glass, such as merged glass or enamel; wood, often carved or turned; shells and other natural animal substances such as bone and ivory; natural clay, polymer clay, and even plastics.
Jewellery and society
One universal issue is control over who could wear what jewellery, a point which indicate the powerful symbolism the wearing of jewellery evoked. In ancient Rome, for instance, only convinced ranks could wear rings; later, sumptuary laws dictated who could wear what type of jewellery; again based on rank. Cultural dictate have also played a important role; for example, the wearing of earrings by Western men was considered "effeminate" in the 19th and early 20th centuries. on the other hand, the jewellery industry in the early 20th century launched a crusade to popularize wedding rings for men — which caught on — as well as appointment rings for men , going so far as to make a false history and claim that the practice had Medieval roots. By the mid 1940s, 85% of weddings in the U.S. feature a double-ring ceremony, up from 15% in the 1920s.Religion has also played a role: Islam, for instance, consider the wearing of gold by men as a social taboo,and many religions have edicts against extreme display.
In creating jewellery, a variety of gemstones, coins, or other valuable items can be used, often set into precious metals. Common expensive metals used for modern jewellery include gold, platinum or silver, although alloys of nearly every metal known can be encountered in jewellery -- bronze, for example, was common in Roman times. Most gold jewellery is made of an alloy of gold, the purity of which is affirmed in karats, indicated by a number followed by the letter K. For example, ordinary gold jewellery ranges from 10K (41.7% pure gold) to 22K (91.6% pure gold), while 24K (99.9% pure gold) is considered too soft for jewellery use. Platinum alloys variety from 900 (90% pure) to 950 (95.0% pure). The silver used in jewellery is usually sterling silver, or 92.5% fine silver.Other generally used materials include glass, such as merged glass or enamel; wood, often carved or turned; shells and other natural animal substances such as bone and ivory; natural clay, polymer clay, and even plastics.
Jewellery and society
One universal issue is control over who could wear what jewellery, a point which indicate the powerful symbolism the wearing of jewellery evoked. In ancient Rome, for instance, only convinced ranks could wear rings; later, sumptuary laws dictated who could wear what type of jewellery; again based on rank. Cultural dictate have also played a important role; for example, the wearing of earrings by Western men was considered "effeminate" in the 19th and early 20th centuries. on the other hand, the jewellery industry in the early 20th century launched a crusade to popularize wedding rings for men — which caught on — as well as appointment rings for men , going so far as to make a false history and claim that the practice had Medieval roots. By the mid 1940s, 85% of weddings in the U.S. feature a double-ring ceremony, up from 15% in the 1920s.Religion has also played a role: Islam, for instance, consider the wearing of gold by men as a social taboo,and many religions have edicts against extreme display.
Wednesday, December 27, 2006
Socialism and social democracy
The term socialism, used from the 1830s onwards in France and England, was directly related to what was called the social question, in essence the problem that the emergence of competitive market societies did not create liberty, equality and fraternity for all citizens, requiring the intervention of politics and social reform to tackle social problems, injustices and grievances a topic on which Jean-Jacques Rousseau discourses at length in his classic work The Social Contract. Originally the term socialist was often used interchangeably with co-operative, mutuality, associations and collectivist.
The term social democracy originally referred to the political project of extending democratic forms of association to the whole of society, substituting popular sovereignty, the universal franchise and social ownership for the rule of a propertied class which had exclusive voting rights.
The term social democracy originally referred to the political project of extending democratic forms of association to the whole of society, substituting popular sovereignty, the universal franchise and social ownership for the rule of a propertied class which had exclusive voting rights.
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