115 résultats pour "introduced"
- Sol Roman In the earliest Roman religion, a sun god worshiped by the Sabines, who introduced the cult of Sol to the Roman people when a Sabine king ruled over that city.
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Hardware (computer).
Magnetic tape drives use magnetic tape similar to the tape used in VCR cassettes. Tape drives have a very slow read/write time, but have a very high capacity; in fact,their capacity is second only to hard disk drives. Tape drives are mainly used to back up data. Compact disc drives store information on pits burned into the surface of a disc of reflective material ( see CD-ROM). CD-ROMs can store up to 737 megabytes (MB) of data. A Compact Disc-Recordable (CD-R) or Compact Disc-ReWritable (CD-RW)...
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Central Processing Unit.
Development of the computer chip started in 1958 when Jack Kilby of Texas Instruments demonstrated that it was possible to integrate the various components of aCPU onto a single piece of silicon. These computer chips were called integrated circuits (ICs) because they combined multiple electronic circuits on the same chip.Subsequent design and manufacturing advances allowed transistor densities on integrated circuits to increase tremendously. The first ICs had only tens of transistorsper chip com...
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John Diefenbaker.
only Conservative elected from Saskatchewan, which had gone solidly to the Co-operative Commonwealth Federation (CCF), a coalition party dedicated to social andwelfare reforms. In 1952 the Liberals in Saskatchewan abolished Diefenbaker's Lake Centre seat altogether by merging it with the neighboring legislative district of Moose Jaw, where theCCF had a vast majority. In 1953 Diefenbaker decided to run for election in Prince Albert. Again he was the only Conservative returned to Parliament fromSa...
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John Diefenbaker - Canadian History.
only Conservative elected from Saskatchewan, which had gone solidly to the Co-operative Commonwealth Federation (CCF), a coalition party dedicated to social andwelfare reforms. In 1952 the Liberals in Saskatchewan abolished Diefenbaker's Lake Centre seat altogether by merging it with the neighboring legislative district of Moose Jaw, where theCCF had a vast majority. In 1953 Diefenbaker decided to run for election in Prince Albert. Again he was the only Conservative returned to Parliament fromSa...
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Electronic Games.
arcade game of all time. With Pizza Time Theaters legitimizing the idea of arcades and hits such as Ms. Pac-Man , Asteroids , Donkey Kong , Tempest , Frogger , and Defender bringing new excitement to gaming, the coin-operated video game business boomed. In 1981 Americans spent 75,000 person-years and $5 billion playing video games at anestimated 4,300 arcades in the United States. Many popular arcade games also were translated for use on the Atari 2600 and its chief rivals in the homemarket—M...
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Automobile.
Electric motors have been used to power automobiles since the late 1800s. Electric power supplied by batteries runs the motor, which rotates a driveshaft, the shaftthat transmits engine power to the axles. Commercial electric car models for specialized purposes were available in the 1980s. General Motors Corporation introduced amass-production all-electric car in the mid-1990s. Automobiles that combine two or more types of engines are called hybrids. A typical hybrid is an electric motor with ba...
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Rap
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INTRODUCTION
Jay-Z
Rapper Jay-Z rose to popularity with such albums as Vol.
Run-DMCTypically in rap music, vocalists recite rhyming lyrics in time to a beat that may be sampled from prerecorded music byother groups. Black youths developed rap music on the streets of inner cities in the United States during the 1970s, butthe style has expanded to include a wider variety of performers and audiences. The rap group Run-DMC, shown here, wasa powerful early influence in the genre. The group helped bring rap music into the mainstream when it released “WalkThis Way” (1986), a s...
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Australia - country.
itself forms most of the border between New South Wales and Victoria. Considerable lengths of the Murray, Darling, and Murrumbidgee rivers are navigable during thewet seasons. The central plains region, also known as the Channel Country, is interlaced by a network of rivers. During the rainy season these rivers flood the low-lying countryside,but in dry months they become merely a series of water holes. The Victoria, Daly, and Roper rivers drain a section of the Northern Territory. In Queensland...
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Australia - Geography.
itself forms most of the border between New South Wales and Victoria. Considerable lengths of the Murray, Darling, and Murrumbidgee rivers are navigable during thewet seasons. The central plains region, also known as the Channel Country, is interlaced by a network of rivers. During the rainy season these rivers flood the low-lying countryside,but in dry months they become merely a series of water holes. The Victoria, Daly, and Roper rivers drain a section of the Northern Territory. In Queensland...
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Cuba - country.
Only two land mammals, the hutia, or cane rat, and the solenodon, a rare insectivore that resembles a rat, are known to be indigenous. The island has numerous batsand nearly 300 kinds of birds, including vultures, wild turkeys, quail, finches, gulls, macaws, parakeets, and hummingbirds. The bee hummingbird of Cuba is thesmallest bird in the world. Among the few reptiles are tortoises, caimans, the Cuban crocodile, and a species of boa that can attain a length of 3.7 m (12 ft). More than700 speci...
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Christmas.
The new custom of Christmas gift giving allowed the marketplace to exert an unprecedented influence on holiday celebrations. Commercial innovations such asdepartment stores and mass advertising further expanded the custom of exchanging Christmas gifts. Seasonal retail sales helped fuel the economy, causing merchantsand advertisers to become some of the season’s most ardent promoters. Many holiday celebrants regretted these changes, however, and began voicing the nowcommon lament that Christmas h...
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Tajikistan - country.
by more than 100 percent due to a high birth rate and improvements in medical care. During the early 1990s, however, the growth rate began to decline due to civilwar and emigration. A Ethnic Groups and Languages Tajiks constitute the largest ethnic group in Tajikistan, making up about 65 percent of the population. The peoples who live in Gorno-Badakhshan, located in the Pamirs,are classified as Tajiks, although their languages and customs are distinct. The largest minority group in the country...
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Arkansas - geography.
temperature rises to the upper 30°s C (lower 100°s F). C2 Precipitation Arkansas receives about 1,000 to 1,300 mm (about 40 to 50 in) of precipitation a year, and some areas receive even more. Most of the rain comes during winter andspring and at times is so heavy as to cause flooding. Snow is rare in the south but amounts to more than 250 mm (10 in) a year in the mountains. C3 Growing Season Arkansas has a long growing season. It averages 211 days for the state as a whole and ranges from 241...
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Arkansas - USA History.
temperature rises to the upper 30°s C (lower 100°s F). C2 Precipitation Arkansas receives about 1,000 to 1,300 mm (about 40 to 50 in) of precipitation a year, and some areas receive even more. Most of the rain comes during winter andspring and at times is so heavy as to cause flooding. Snow is rare in the south but amounts to more than 250 mm (10 in) a year in the mountains. C3 Growing Season Arkansas has a long growing season. It averages 211 days for the state as a whole and ranges from 241...
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Greece - country.
minerals, such as chromium, copper, uranium, and magnesium, are relatively small. Greece’s small petroleum deposits, located under the Aegean Sea near the island ofThásos, are rapidly being depleted. There are no significant reserves of natural gas. Greece’s forests, probably abundant in ancient times, have been significantly depleted. Subsequent soil erosion has made reforestation efforts difficult. Although muchof Greece’s soil is rocky and dry, the country’s mountains are interspersed with sm...
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Cubism
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INTRODUCTION
Cubism, movement in modern art, especially in painting, invented by Spanish artist Pablo Picasso and French artist Georges Braque in 1907 and 1908.
Mont Sainte-Victoire by CézanneFrench artist Paul Cézanne painted Mont Sainte-Victoire, a mountain near his home in Provence in southern France, onmany occasions. Over time, the images he produced became flatter, less realistic, and more abstract. In this late version,painted from 1902 to 1904, patches of color barely indicate the mountain, sky, and foreground, while creating a rhythmicpattern across the painting’s surface. The mountain and sky, both intensely blue, appear almost to merge.Philad...
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Azerbaijan - country.
second most important industrial center after Baku. A Ethnic Groups Azerbaijan, including the autonomous exclave of Naxçivan, is populated mostly by ethnic Azerbaijanis, who are also known as Azeris. The ethnic composition of thecountry changed due to a civil war between the government of Azerbaijan and Armenian secessionists in the Nagorno-Karabakh enclave. Beginning in 1988, when thepeople of Nagorno-Karabakh unilaterally decided to secede from Azerbaijan, nearly the entire Azerbaijani popula...
- Men's Alpine Skiing: Olympic Gold Medalists Alpine skiing was introduced to the Olympic Games in 1936.
- Women's Alpine Skiing: Olympic Gold Medalists Alpine skiing was introduced to the Olympic Games in 1936.
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Electric Lighting.
successful arc lamp in 1878. Tungsten filaments were substituted for carbon filaments in incandescent lamps in 1907, and gas-filled incandescent lamps were developedin 1913. The fluorescent lamp was introduced in 1938. See also Lamp. For most of the 20th century the incandescent light bulb was widely used for lighting in homes. More energy-efficient and longer-lasting fluorescent lamps were adoptedfor industrial and office use. In 1979 a compact fluorescent bulb that screwed into ordinary lig...
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Kangaroo - biology.
ungulates, they have evolved multi-chambered stomachs containing bacteria that can break down plant cell walls and release the nutritious cell contents. V SOCIAL ORGANIZATION Kangaroo social life is poorly understood, as few species have been studied in detail. Small species, such as potoroos, bettongs, and musky rat-kangaroos, tend to besolitary and widely dispersed, with a male's territory encompassing those of several females. The animals come together briefly for mating, and mother and offs...
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Railroads.
III GAUGES The gauge of track is the distance between the inner edges of the rails at points 1.59 cm (0.626 in) below the top of the heads. In the United States, Canada, theUnited Kingdom, Mexico, Norway, Sweden, and much of continental Europe, the standard gauge is 143.51 cm (56.5 in). Why this measurement became the standard isa matter of speculation. Probably the tradition is inherited from early tramroads built to accommodate wagons with axles 1.5 m (5 ft) long; some of the early edge rail...
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Denmark - country.
forests, which cover just 11.6 percent of the country, include conifers (mainly fir, spruce, larch, and pine), beech, oak, birch, and ash. Several varieties of ferns andmosses common to the northern European mainland are also found. Wild animals are scarce. Natural animal life is limited to deer and small animals such as foxes,squirrels, hares, wild ducks, pheasants, and partridges. Numerous species of freshwater fish live in Denmark’s streams and lakes. F Environmental Issues Considered highly...
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Spanish Empire.
Spain’s royal government quickly imposed its own officials, first to collect taxes and then to administer the colony. Its goal was to assert royal control over both settlersand indigenous peoples. In Spain the government established a House of Trade to supervise colonial affairs and to oversee, license, and tax all trade and commerce. Asthe royal government asserted more authority over colonial activities, Columbus lost effective power, and was eventually replaced by other colonial governors. Wi...
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Spanish Empire .
Spain’s royal government quickly imposed its own officials, first to collect taxes and then to administer the colony. Its goal was to assert royal control over both settlersand indigenous peoples. In Spain the government established a House of Trade to supervise colonial affairs and to oversee, license, and tax all trade and commerce. Asthe royal government asserted more authority over colonial activities, Columbus lost effective power, and was eventually replaced by other colonial governors. Wi...
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Florida - USA History.
accidentally introduced into the region in the 1880s, and it spread with alarming rapidity throughout the upper reaches of the river. The plant is very difficult toeradicate, and it has also clogged the channels of other Florida rivers. To increase drainage of the Everglades, which drain naturally to Florida Bay and the Gulf ofMexico, a number of drainage channels and canals have been built across southern Florida. Among the rivers flowing from the peninsula to the Gulf of Mexico are the Suwanne...
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Technology.
loose soil in this region, known as the Fertile Crescent, was easily scratched for planting, and an abundance of trees was available for firewood. By 5000 BC, farming communities were established in areas known today as Syria, Turkey, Lebanon, Israel, Jordan, Greece, and the islands of Crete and Cyprus. Agricultural societies in these places constructed stone buildings, used the sickle to harvest grain, developed a primitive plowstick, and advanced their skills inmetalworking. Trade in flint al...
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Uganda - country.
Uganda’s population is predominantly rural and is concentrated in the south, particularly in the crescent at the edge of Lake Victoria and in the southwest. Almost allUgandans are black Africans. Foreign residents make up less than 4 percent of the population and come mostly from neighboring states. In 2008 Uganda’s population was estimated at 31,367,972. The estimated growth rate of the population in 2008 was 3.6 percent. The birth rate was 48 per 1,000people and the death rate 12 per 1,000. Th...
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Kazakhstan - country.
mismanagement. Between 1949 and 1991 the Soviet government conducted about 70 percent of all of its nuclear testing in Kazakhstan, mostly in the northeastern area near the city ofSemipalatinsk (now Semey). Nearly 500 nuclear explosions occurred both above and below ground near Semipalatinsk, while more than 40 nuclear detonationsoccurred at other testing grounds in western Kazakhstan and in the Qyzylqum desert. More than 1 million of Kazakhstan’s inhabitants were exposed to dangerous levelsof ra...
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European Union .
safeguard the interests of the member states, a common assembly with advisory authority only, and a court of justice to settle disputes. D European Economic Community (EEC) In 1957 the participants in the ECSC signed two more treaties, known as the Treaties of Rome. These treaties created the European Atomic Energy Community(Euratom) for the development of peaceful uses of atomic energy and, most important, the European Economic Community (EEC, often referred to as the CommonMarket). The EEC tr...
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Atificiel
Sustainability 2019,11 , 189 2 of 24Since the 1980s, many research was conducted to minimize the error of prediction through a method dubbed as gradient descent. This method is referred to as a Backpropagation algorithm for the training of the ANNs and it was applied to solve problems in different domains using few hidden layers [ 5,6]. Today, the availability of data has introduced the concept of machine learning as a subcategory to AI. Machine learning implies coding the computers to behave l...
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Honduras - country.
A Principal Cities The capital and largest city of Honduras is Tegucigalpa (2006 estimate, 1,324,000), located in the south-central highlands region. The country’s second largest city isSan Pedro Sula (549,498). The principal city and commercial center in the north, it lies in the heart of the vast banana plantations on the Caribbean Sea. La Ceiba(127,590) and Puerto Cortés (90,161) are among the leading Caribbean ports. B Language and Religion Spanish is the official language and is spoken by...
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Rice - biology.
V HISTORY According to the most widely accepted theory, rice cultivation originated as early as 10,000 BC in Asia. Archaeological evidence shows that rice was grown in Thailand as early as 4000 BC, and over the centuries spread to China, Japan, and Indonesia. By 400 BC rice was cultivated in the Middle East and Africa. The invading armies of Alexander the Great probably introduced rice to Greece and nearby Mediterranean countries around 330 BC. Rice was brought to the American colonies in t...
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Microprocessor.
thin layer of oxide about 75 angstroms deep (an angstrom is one ten-billionth of a meter). Nearly every layer that is deposited on the wafer must be patterned accurately into the shape of the transistors and other electronic elements. Usually this is done in aprocess known as photolithography, which is analogous to transforming the wafer into a piece of photographic film and projecting a picture of the circuit on it. A coatingon the surface of the wafer, called the photoresist or resist, changes...
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Electronic Music
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INTRODUCTION
Electronic Music, music that requires the use of electronic devices to produce or manipulate sound during its composition and performance.
III SYNTHESIZERS AND OTHER ELECTRONIC TECHNOLOGY Moog SynthesizerThe musical synthesizer was invented by American Robert Moog. Soon after Moog introduced an early version in 1964, itbecame known as the “Moog Synthesizer,” and then simply as the “Moog.” Here, Japanese composer Isao Tomita uses aMoog synthesizer in his studio.Huynh Cong/AP/Wide World Photos In the 1950s sound synthesizers were developed, principally in the United States. Synthesizers enabled composers to produce sounds electroni...
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Internal-Combustion Engine.
any Otto-cycle engine and in actual engines today is slightly more than 40 percent. Diesels are, in general, slow-speed engines with crankshaft speeds of 100 to 750revolutions per minute (rpm) as compared to 2500 to 5000 rpm for typical Otto-cycle engines. Some types of diesel, however, have speeds up to 2000 rpm. Becausediesels use compression ratios of 14 or more to 1, they are generally more heavily built than Otto-cycle engines, but this disadvantage is counterbalanced by theirgreater effici...
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Army.
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INTRODUCTION
Army, military land forces of a nation, assembled, drilled, disciplined,
disappearance for several centuries of large standing armies in Europe. A Middle Ages Feudalism was based on a concept of local defense, each baron or landowner governing land that had been given him by the king, and each lord having his ownpersonal protective forces recruited from among men who worked for him. In return, each lord and his men were pledged to annual service to the monarch and couldbe called on in special instances, as in the defense of Christendom during the Crusades. National...
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Coins and Coin Collecting.
U.S. coins dates from 1909, when the first Lincoln Cents appeared during the centennial of Abraham Lincoln’s birth. George Washington’s profile was used on thequarter-dollar of 1932, a coin originally intended as a one-year commemorative to honor the 200th anniversary of his birth. The design quickly became so popular thatit was retained for regular-issue quarters and is still being used today. Thomas Jefferson, Franklin D. Roosevelt, John F. Kennedy, and Dwight D. Eisenhower are theother Americ...
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Dentistry.
Together with dentists, dental hygienists and dental assistants make up the team that provides dental care to patients. Hygienists record patient medical histories, suchas blood pressure and pulse. They clean teeth, apply sealants and fluoride treatments, teach patients sound oral hygiene practices, and often assist with X rays. Manyhygienists receive a two-year associate degree, while others may choose to enroll in a four-year program at a university or in a master’s degree program. There are25...
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Toys.
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INTRODUCTION
Toys, objects that serve as playthings for children. Although the
clay. These readily available elements were also used to make more elaborate toys as human society advanced. Archaeologists have found primitive, handmade toys such as wooden or cloth dolls, clay marbles, and terracotta figures that date back thousands of years. In ancientEgypt, Greece, and Rome, people placed dolls or clay figures in the graves or tombs of children for them to play with in the afterlife. The yo-yo may seem like a 20th-century fad, but it actually dates back at least 2,500 years...
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Musical
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INTRODUCTION
George Gershwin
American pianist, songwriter, and composer George Gershwin was one of the most important figures in popular song in
the 1920s and 1930s.
C Extravaganzas Another predecessor of musical comedy, the extravaganza, evolved soon after the American Civil War (1861-1865) from traditional English pantomime. Extravaganzaswere typically based on fairy tales and Mother Goose. They introduced some of the elements—songs, dances, and comedy combined with spectacular stage sets andeffects—that American musical comedy later became known for. The first and most famous extravaganza show was The Black Crook (1866), often described as America’s fi...
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Protestantism.
F England The Anglican Church became the established church in England when Henry VIII assumed (1534) the ecclesiastical authority over the English church that had previouslybeen exercised by the pope. Henry’s motive was to annul his marriage to Catherine of Aragón rather than to reform church doctrine, and he imposed severe lawsupholding the major tenets of medieval Catholicism. Under King Edward VI and Queen Elizabeth, however, the Anglican Church developed a distinctly Protestant creedthat w...
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Warfare.
organizations as the League of Nations in 1920 and the United Nations in 1945, and détente (suggested for scaling down the cold war). See Arms Control. Modern antiwar sentiment and organized peace movements are derived in large part from the beliefs of religious sects such as the Society of Friends and the MennoniteChurch. The first peace societies in history were established in the U.S. in 1815, and since then pacifists have actively opposed wars and conscription, and promoted thecause of con...
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Money.
A Early Monetary Regulations In the American colonies, coins of almost every European country circulated, with the Spanish dollar predominating. Because of the scarcity of coins, the colonists alsoused various primitive mediums of exchange, such as bullets, tobacco, and animal skins. Many of the colonies issued paper money that circulated at varying rates ofdiscount. The first unified currency consisted of the notes issued by the Continental Congress to finance the American Revolution. These no...
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Chinese Literature
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INTRODUCTION
Chinese Literature, writings of the Chinese people, with a continuous history of more than 3,000 years.
(Huang) River basin region in the north. The verses are in lines of four characters (or syllables) and use rhyme and alliteration (repetition of the initial letter). Confuciusquoted them in his works. Because he described them as “without depraved thoughts,” all the verses in the Shi jing have been treated as moral allegories. (4) The Li ji (Book of Ritual ) contains detailed discussions of the principles of conduct at court and in private ceremonies. Although the Han dynasty and later ruler...
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Chinese Literature
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INTRODUCTION
Chinese Literature, writings of the Chinese people, with a continuous history of more than 3,000 years.
(Huang) River basin region in the north. The verses are in lines of four characters (or syllables) and use rhyme and alliteration (repetition of the initial letter). Confuciusquoted them in his works. Because he described them as “without depraved thoughts,” all the verses in the Shi jing have been treated as moral allegories. (4) The Li ji (Book of Ritual ) contains detailed discussions of the principles of conduct at court and in private ceremonies. Although the Han dynasty and later ruler...
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Christopher Columbus
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INTRODUCTION
Christopher Columbus (1451-1506), Italian-born Spanish navigator who sailed west across the Atlantic Ocean in search of a route to Asia but achieved fame by making
landfall in the Americas instead.
explorers, adventurers, entrepreneurs, merchants, and any others who saw their fortunes tied to the trade winds and ocean currents. Columbus’s brother Bartholomewworked in Lisbon as a mapmaker, and for a time the brothers worked together as draftsmen and book collectors. Later that year, Columbus set sail on a convoy loadedwith goods to be sold in northern Atlantic ports. In 1478 or 1479 Columbus met and married Felipa Perestrello e Moniz, the daughter of a respected, though relatively poor, nob...
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Christopher Columbus.
explorers, adventurers, entrepreneurs, merchants, and any others who saw their fortunes tied to the trade winds and ocean currents. Columbus’s brother Bartholomewworked in Lisbon as a mapmaker, and for a time the brothers worked together as draftsmen and book collectors. Later that year, Columbus set sail on a convoy loadedwith goods to be sold in northern Atlantic ports. In 1478 or 1479 Columbus met and married Felipa Perestrello e Moniz, the daughter of a respected, though relatively poor, nob...
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Christopher Columbus.
explorers, adventurers, entrepreneurs, merchants, and any others who saw their fortunes tied to the trade winds and ocean currents. Columbus’s brother Bartholomewworked in Lisbon as a mapmaker, and for a time the brothers worked together as draftsmen and book collectors. Later that year, Columbus set sail on a convoy loadedwith goods to be sold in northern Atlantic ports. In 1478 or 1479 Columbus met and married Felipa Perestrello e Moniz, the daughter of a respected, though relatively poor, nob...