713 résultats pour "then"
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Artificial Intelligence.
Work in AI has primarily focused on two broad areas: developing logic-based systems that perform common-sense and expert reasoning, and using cognitive andbiological models to simulate and explain the information-processing capabilities of the human brain. In general, work in AI can be categorized within three research anddevelopment types: symbolic, connectionist, and evolutionary. Each has characteristic strengths and weaknesses. A Symbolic AI Symbolic AI is based in logic. It uses sequences...
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Excerpt from Our Mutual Friend - anthology.
The Podsnaps lived in a shady angle adjoining Portman Square. They were a kind of people certain to dwell in the shade, wherever they dwelt. Miss Podsnap's lifehad been, from her first appearance on this planet, altogether of a shady order; for, Mr Podsnap's young person was likely to get little good out of association withother young persons, and had therefore been restricted to companionship with not very congenial older persons, and with massive furniture. Miss Podsnap's earlyviews of life be...
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From Bulfinch's Mythology: Prometheus and Pandora - anthology.
The world being thus furnished with inhabitants, the first age was an age of innocence and happiness, called the Golden Age. Truth and right prevailed, though not enforced by law, nor was there any magistrate to threaten or punish. The forest had not yet been robbed of its trees to furnish timbers for vessels, nor had men builtfortifications round their towns. There were no such things as swords, spears, or helmets. The earth brought forth all things necessary for man, without his labour inplo...
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what did you do?
ceilings, theplates, thewindows, thelampshades! Wasitan act ofrebellion! Anact ofexpression! Werethepaintings good, orwas that beside thepoint! Ineeded tosee itfor myself, andIneeded totell the world about it!Iused tolive for reporting likethat! Stalin found outabout thecommunity andsent histhugs in,just afew days before Igot there, to break alloftheir arms! Thatwasworse thankilling them! Itwas ahorrible sight,Oskar: theirarms incrude splints, straight infront ofthem likezombies! Theycouldn't fe...
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Memory (psychology).
memory span —how many items people can correctly recall in order. Researchers would show people increasingly long sequences of digits or letters and then ask them to recall as many of the items as they could. In 1956 American psychologist George Miller reviewed many experiments on memory span and concluded that peoplecould hold an average of seven items in short-term memory. He referred to this limit as “the magical number seven, plus or minus two” because the results of thestudies were so consi...
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Spider (arthropod) - biology.
The spider’s abdomen is soft and saclike. On the underside of the tip of the abdomen are three pairs of spinnerets. Each spinneret is studded with many fine, hairliketubes called spigots, which produce a variety of silk threads. The spigots lead to several large silk glands inside the abdomen. Silk is formed as a liquid inside theseabdominal glands. As the silk is drawn out through the spigots, protein molecules within the silk line up parallel to one another, causing the silk to harden and form...
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Television.
A charge-coupled device (CCD) can be much smaller than a camera tube and is much more durable. As a result, cameras with CCDs are more compact and portablethan those using a camera tube. The image they create is less vulnerable to distortion and is therefore clearer. In a CCD, the light from a scene strikes an array ofphotodiodes arranged on a silicon chip. Photodiodes are devices that conduct electricity when they are struck by light; they send this electricity to tiny capacitors. Thecapacitors...
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American Westward Movement - U.
British expansion. However, Native Americans of the Great Lakes and Ohio Valley lashed out against the English in an attempt to preserve their independence, theirland, and their way of life. With the Ottawa chief Pontiac as their most visible leader, the tribes waged a bloody and costly war. As a result, the British governmentdecided to keep the white settlers apart from the Native Americans. It issued the Royal Proclamation of 1763, banning all white settlement beyond the Appalachians andstatin...
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Fishing.
directly to the spool and turns the spool one rotation at a time. C Fishing Lines Fishing lines serve as the link between the angler’s reel and the lure or bait. The most popular line used for sportfishing is monofilament nylon line, which is strong anddurable and has a certain amount of stretch, which helps when an angler sets the hook. The line comes in a variety of strengths, from 2-pound test to more than 100-pound test. (Pound test is the amount of pressure that can be put on a line before...
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Advertising.
Advertising agencies make money in a variety of ways. When the agency uses the client’s advertising budget to buy time for an ad on the radio or on television or whenit buys space for an ad in a newspaper or magazine, the media outlet allows the agency to keep 15 percent of the cost of the space or the time as a commission. The15 percent commission has become an advertising industry standard and usually accounts for the largest portion of the agency’s income. Agencies also charge clientsfor the...
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Library (institution).
rooms, special galleries for exhibitions, auditoriums for lectures or concerts, computer rooms, children’s rooms, photocopy rooms, and classrooms. A3 Lending Materials As part of their mission to provide information resources to the community, public libraries allow users to borrow items from their collections for limited amounts of time.To be eligible to borrow public library materials, a user must register her or his name, address, and other basic information with the local library’s circulat...
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Marketing.
Where advertising reaches a mass audience, personal or direct selling focuses on one customer at a time. That kind of individual attention makes direct sellingexpensive, but it also makes it effective. As the costs of personal selling have risen, the utilization of salespeople has changed. Simple transactions are completed byclerks. Salespeople are now used primarily where the products are complex and require detailed explanation, customized application, or careful negotiation over priceand paym...
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Uzbekistan - country.
E Environmental Issues The evaporation of the Aral Sea is one of the worst ecological disasters in the world. The Aral has shrunk so much that it now holds only about one-fifth the volume ofwater it held in 1960. The shrinkage is due to irrigation withdrawals from the Amu Darya and Syr Darya, a practice that began on a massive scale in the early 1960s aspart of the Soviet Union’s ill-conceived drive to increase cotton yields in Central Asia. Growing cotton in the naturally arid and saline soil...
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Excerpt from Henry IV - anthology.
PRINCE HAL. Or an old lion, or a lover's lute. FALSTAFF. Yea, or the drone of a Lincolnshire bagpipe. PRINCE HAL. What sayest thou to a hare, or the melancholy of Moorditch? FALSTAFF. Thou hast the most unsavoury similes, and art indeed the most comparative rascalliest sweet young prince. But Hal, I prithee trouble me no more withvanity. I would to God thou and I knew where a commodity of good names were to be bought. An old lord of the Council rated me the other day in the street aboutyou, sir,...
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Ulysses S.
In the autumn of 1862, Grant began planning the drive on Vicksburg, Mississippi, the Confederate stronghold on the Mississippi River, which was to yield one of hisgreatest military successes. After several unsuccessful attempts on Vicksburg during the winter, Grant devised a new strategy of attack. In April 1863 he marched hisarmy south along the west side of the river to a point well below the heavily defended city. There, with the aid of the Union river fleet, he crossed the river and began as...
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Ulysses S.
In the autumn of 1862, Grant began planning the drive on Vicksburg, Mississippi, the Confederate stronghold on the Mississippi River, which was to yield one of hisgreatest military successes. After several unsuccessful attempts on Vicksburg during the winter, Grant devised a new strategy of attack. In April 1863 he marched hisarmy south along the west side of the river to a point well below the heavily defended city. There, with the aid of the Union river fleet, he crossed the river and began as...
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Rocket.
the vacuum of space, however, demonstrated that this belief was not true. In fact, rockets produce more thrust in the vacuum of space than on Earth. Air pressure andfriction with the air reduce a rocket’s thrust by about 10 percent on Earth as compared to the rocket’s performance in space. B Thrust and Efficiency Thrust is a measurement of the force of a rocket, or the amount of “push” exerted backward to move a rocket forward. Thrusts vary greatly from rocket to rocket.Engineers measure thrust...
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Rocket - astronomy.
the vacuum of space, however, demonstrated that this belief was not true. In fact, rockets produce more thrust in the vacuum of space than on Earth. Air pressure andfriction with the air reduce a rocket’s thrust by about 10 percent on Earth as compared to the rocket’s performance in space. B Thrust and Efficiency Thrust is a measurement of the force of a rocket, or the amount of “push” exerted backward to move a rocket forward. Thrusts vary greatly from rocket to rocket.Engineers measure thrust...
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Manhattan Project - U.
other possible uses of nuclear energy, such as using uranium to operate large power plants or, perhaps, as power sources for ships or submarines. Then Nazi Germanyinvaded Poland on September 1, 1939, and Europe plunged into war. The scientists realized that any plans to build large-scale nuclear power plants would have to waituntil the war was over. Two weeks after the invasion of Poland, Hitler made a radio speech in which he threatened Britain with “a weapon against which there is no defense.”...
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Sewage Disposal.
greater load on the piping system and the treatment plant. The amount of storm-water drainage to be carried away depends on the amount of rainfall as well as on the runoff or yield of the watershed ( see Drainage). A typical metropolitan area discharges a volume of wastewater equal to about 60 to 80 percent of its total daily water requirements, the rest being used for washingcars and watering lawns, and for manufacturing processes such as food canning and bottling. B Composition The composi...
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Snake (reptile).
in their heads that conduct sound. They are able to hear low-frequency sounds and to sense vibrations that travel through the ground or water. The majority of snakeshave good eyesight, especially for detecting moving objects, although most burrowing snakes can only distinguish between light and dark. Pit vipers, boas, and pythons have an unusual adaptation for detecting warm-blooded prey and predators. On the heads of these snakes are small pits lined with cellsthat are extremely sensitive to he...
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Census.
Prior to any census, a census agency must develop an accurate list of addresses and maps to ensure that everyone is counted. The U.S. Census Bureau obtainsaddresses primarily from the United States Postal Service and from previous census address lists. It also works closely with state, local, and tribal governments tocompile accurate lists. Finally, census agencies often conduct an extensive marketing campaign before Census Day to remind the general population about theimportance of responding t...
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Russian Revolutions of 1917 (Histoire) .
as Marxists. They believed that the working class—with its struggles to organize trade unions and to bring about political reforms of benefit to the majority ofpeople—would become the primary force for revolutionary change. The Russian Marxists formed the Russian Social Democratic Labor Party (RSDLP) in 1898. By 1903,however, the RSDLP had split into two factions. The faction called the Bolsheviks (from the Russian word for “majority”), led by Vladimir Ilich Lenin, favored a more centralized a...
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Heart.
situation. A Cardiac Cycle Although the right and left halves of the heart are separate, they both contract in unison, producing a single heartbeat. The sequence of events from the beginning ofone heartbeat to the beginning of the next is called the cardiac cycle. The cardiac cycle has two phases: diastole, when the heart’s chambers are relaxed, and systole,when the chambers contract to move blood. During the systolic phase, the atria contract first, followed by contraction of the ventricles. T...
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Health Insurance.
needs services. Essentially, individuals make regular payments to the plan rather than having to pay especially large sums at any one time in the event of sudden illnessor injury. In this way, the group as a whole funds expensive treatments for those few who need them. Many people believe that in addition to providing financial stability, health insurance can promote good health. Supporters of this idea claim that by lowering thepersonal cost of services, insurance induces individuals to seek he...
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History of Astronomy - astronomy.
Egypt, the Sun was directly overhead at noon. On the same date and time in Alexandria, Egypt, the Sun was about 7 degrees south of zenith. With simple geometryand knowledge of the distance between the two cities, he estimated the circumference of the Earth to be 250,000 stadia. (The stadium was a unit of length, derivedfrom the length of the racetrack in an ancient Greek stadium. We have an approximate idea of how big an ancient Greek stadium was, and based on that approximationEratosthenes was...
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From Sir Gawain and the Green Knight - anthology.
And she urged it on him eagerly, and ever he refused,And vowed in very earnest, prevail she would not.And she sad to find it so, and said to him then,“If my ring is refused for its rich cost -You would not be my debtor for so dear a thing—I shall give you my girdle; you gain less thereby.”She released a knot lightly, and loosened a beltThat was caught about her kirtle, the bright cloak beneath,Of a gay green silk, with gold overwroght,And the borders all bound with embroidery fine,And this she p...
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Excerpt from Sense and Sensibility - anthology.
was just arrived, and quitted not his hold till he had seated her in a chair in the parlour. Elinor and her mother rose up in amazement at their entrance, and while the eyes of both were fixed on him with an evident wonder and a secret admiration whichequally sprung from his appearance, he apologised for his intrusion by relating its cause, in a manner so frank and so graceful, that his person, which wasuncommonly handsome, received additional charms from his voice and expression. Had he bee...
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Great Lakes - Geography.
of 1972 and 1978, have focused on water-quality problems in the Great Lakes. The International Joint Commission on the Great Lakes, established under the BoundaryWaters Treaty, implements and oversees these agreements and has limited authority to regulate obstructions or diversions of boundary waters that would affect thenatural level or flow of lake waters. B Exotic Species The fish populations of the lakes have changed dramatically in the 20th century; changes were wrought at first by overfis...
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Dog Family - biology.
muzzles, long and bushy tails, and large ears. Many foxes hunt by stalking prey and then leaping on it with a distinctive, stiff-legged pounce. Once thought to besolitary animals, foxes are now known to live in groups of up to six individuals. The remaining canids are each highly distinctive. Raccoon dogs and bush dogs are the least doglike canids in appearance. Raccoon dogs, found in eastern Asia, havestubby legs, a stout body, short ears, shaggy fur, and a black face mask that resembles a racc...
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Michael Jordan.
playoffs the Bulls pushed the Pistons to seven games in the Eastern Conference Finals before losing again. As he grew older, Jordan made a concerted effort to help his teammates reach their own potential. The result of his renewed commitment to team-oriented play was theBulls’ first NBA championship title. After the 1990-91 season the Bulls swept the Pistons in the Eastern Conference Finals and then defeated the Los Angeles Lakers inthe NBA Finals. Jordan won the league MVP award for the second...
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Michael Jordan
I
INTRODUCTION
Michael Jordan, born in 1963, American professional basketball player, considered by many to be the greatest player in basketball history.
playoffs the Bulls pushed the Pistons to seven games in the Eastern Conference Finals before losing again. As he grew older, Jordan made a concerted effort to help his teammates reach their own potential. The result of his renewed commitment to team-oriented play was theBulls’ first NBA championship title. After the 1990-91 season the Bulls swept the Pistons in the Eastern Conference Finals and then defeated the Los Angeles Lakers inthe NBA Finals. Jordan won the league MVP award for the second...
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Amphibian (animal) - biology.
strong enough to kill potential predators. C Hearing, Vision, and Vocalizations Amphibians rely on their senses to find food and evade predators. Amphibians lack external ears but have well-developed internal ears. Hearing is most acute in frogs,which typically have a middle ear cavity for transferring sound vibrations from the eardrum, or tympanum, to the inner ear. Frogs and toads also use their keen hearingin communicating with one another. Using a true voice box, or larynx, and a large, exp...
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Reformation .
Saxony, he made war against the Schmalkaldic League, a defensive association of Protestant princes. The Roman Catholic forces were successful at first. Later,however, Duke Maurice went over to the Protestant side, and Charles V was obliged to make peace. The religious civil war ended with the religious Peace of Augsburg in1555. Its terms provided that each of the rulers of the German states, which numbered about 300, choose between Roman Catholicism and Lutheranism and enforcethe chosen faith up...
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Flower - biology.
insects. The sepals unfurl as the flower opens and often resemble small green leaves at the flower’s base. In some flowers, the sepals are colorful and work with thepetals to attract pollinators. E Variations in Structure Like virtually all forms in nature, flowers display many variations in their structure. Most flowers have all four whorls—pistil, stamens, petals, and sepals. Botanists callthese complete flowers. But some flowers are incomplete, meaning they lack one or more whorls. Incomplet...
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Orthodox Church.
formally defined by an ecumenical council, as it was in Catholicism, some Orthodox theologians have taught that the act of becoming a monk or the service of burial canalso be sacraments. The sacramental practice of the Orthodox differs in many details from Western customs. Baptism is administered by immersing the child or adult three times under thewater, each time in the name of one of the persons of the Trinity. It is followed immediately by anointment with chrism, a sacred perfumed oil that r...
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Ice Hockey.
Each period begins with a face-off at the blue dot at center ice. During the face-off one player from each team lines up at the dot with the stick blade on the ice. After the referee drops the puck, the two players attempt to gain possession of it. Quick hands and strength are essential qualities for players participating in the face-off. Once the puck is dropped, it is in play until an official’s whistle stops it, a goal is scored, or time expires. The team on offense tries to move the puck f...
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Augustine
do what one knows one ought not to be doing, mark him off from ethicists of the classical Greek period. YetAugustine also preserves in his own thinking important strands of ancient Greek thought. Thus, for example, hisdevelopment of the doctrine of the Christian virtues includes an echo of Plato's idea of the unity of the virtues. Hisinsistence that 'ought' does not, in any straightforward way, imply 'can', distinguishes him, not only from hiscontemporary Pelagius, whom he helped brand...
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Maris Breaks Home Run Record.
Bothered by an injured hip, Mantle was removed from the lineup in mid-September with 54 long balls, leaving Maris alone in the home-run derby. The pressureincreased as a result of a July 17 ruling by Major League Baseball Commissioner Fred Frick that the record would have to be matched or bettered within 154 games,the number of games played in the 1927 season. In 1961, for the first time, American League teams played 162 games. Frick, a friend of Ruth's, said that if therecord was broken after 1...
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It wasn't until the day before we were going to go that the renter asked the obvious question.
I told her, "Ipromise I'mgoing tobe better soon." She said, "There's nothingwrongwithyou." "I'll behappy andnormal." She putherfingers around theback ofmy neck. I told her, "Itried incredibly hard.Idon't know howIcould havetriedharder." She said, "Dad would havebeen veryproud ofyou." "Do youthink so?" "I know so." I cried some more. Iwanted totell her allofthe liesthat I'dtold her. And then Iwanted hertotell me that itwas OK, because sometimes youhave todo something badtodo something good.Andthe...
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From As You Like It - anthology.
ROSALIND : Ay, and twenty such. ORLANDO : What sayst thou? ROSALIND : Are you not good? ORLANDO : I hope so. ROSALIND : Why then, can one desire too much of a good thing? [ To CELIA ] Come, sister, you shall be the priest and marry us.—Give me your hand, Orlando.—What do you say, sister?ORLANDO : [to CELIA ] Pray thee, marry us. CELIA : I cannot say the words. ROSALIND : You must begin, 'Will you, Orlando'— CELIA : Go to. Will you, Orlando, have to wife this Rosalind? ORLANDO : I will. ROSALIND...
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Water - chemistry.
flourides in drinking water has been found to reduce tooth decay. See Fluorine. Seawater contains, in addition to concentrated amounts of sodium chloride, or salt, many other soluble compounds, as the impure waters of rivers and streams areconstantly feeding the oceans. At the same time, pure water is continually lost by the process of evaporation, and as a result the proportion of the impurities that givethe oceans their saline character is increased. See Ocean and Oceanography. VII WATER...
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Battle of Waterloo.
In the meantime, Grouchy had failed to overtake Blücher's army. At about 10 PM on June 17, Grouchy's scouts informed him that the Prussians, instead of retreating east to Namur, had turned northwest, seeking apparently a juncture with Wellington. Grouchy's message of warning to Napoleon brought the reply, sent at 10 AM on June 18, that Grouchy should keep trying to make contact with the Prussians. Grouchy's pursuit was slovenly and unhurried, and he failed to locate the enemy. On the morning o...
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Excerpt from A Christmas Carol - anthology.
External heat and cold had little influence on Scrooge. No warmth could warm, no wintry weather chill him. No wind that blew was bitterer than he, no falling snowwas more intent upon its purpose, no pelting rain less open to entreaty. Foul weather didn’t know where to have him. The heaviest rain, and snow, and hail, and sleet,could boast of the advantage over him in only one respect. They often “came down” handsomely and Scrooge never did. Nobody ever stopped him in the street to say, with g...
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From Bulfinch's Mythology: Perseus and Medusa - anthology.
The Sea-monster Perseus, continuing his flight, arrived at the country of the Æthiopians, of which Cepheus was king. Cassiopeia his queen, proud of her beauty, had dared to compareherself to the Sea-Nymphs, which roused their indignation to such a degree that they sent a prodigious sea-monster to ravage the coast. To appease the deities,Cepheus was directed by the oracle to expose his daughter Andromeda to be devoured by the monster. As Perseus looked down from his aerial height he beheld thev...
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Napoleonic Wars .
Before the effect of British sea power could be manifest, however, Napoleon increased his power over the Continent. In 1806 Prussia, aroused by Napoleon's growingstrength in Germany, joined in a Fourth Coalition with Britain, Russia, and Sweden. Napoleon badly defeated the Prussians in the Battle of Jena on October 14, 1806,and captured Berlin. He then defeated the Russians in the Battle of Friedland and forced Alexander I to make peace. By the principal terms of the Treaty of Tilsit, Russiagave...
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Oliver Cromwell
I
INTRODUCTION
Oliver Cromwell (1599-1658), leader in the English Revolution (1640-1660) and the first commoner to rule England.
as well as to the abolition of the House of Lords. He was an active member of the High Court of Justice set up for the king’s trial and boldly signed the king’s deathwarrant. For Cromwell, Charles’s execution was a divine judgment against a tyrant. Following the king’s execution, the Commonwealth of England was formed, ruled bya Council of State that included members of the Rump Parliament. For the next two years Cromwell remained a soldier in service to the state. The new Commonwealth had power...
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Oliver Cromwell.
as well as to the abolition of the House of Lords. He was an active member of the High Court of Justice set up for the king’s trial and boldly signed the king’s deathwarrant. For Cromwell, Charles’s execution was a divine judgment against a tyrant. Following the king’s execution, the Commonwealth of England was formed, ruled bya Council of State that included members of the Rump Parliament. For the next two years Cromwell remained a soldier in service to the state. The new Commonwealth had power...
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American Revolution.
C1 The South Southern agriculture was founded on the cultivation of tobacco, wheat, and corn in Virginia, Maryland, and North Carolina, and of rice and indigo (a blue dye) in SouthCarolina and Georgia. There was a large demand for these crops in Europe. These crops were cultivated with the help of black slaves imported from Africa. The whiteplanter class in the South was the most powerful, both politically and economically. C2 The North Wheat was the main cash crop of the mid-Atlantic colonies...
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American Revolution - U.
C1 The South Southern agriculture was founded on the cultivation of tobacco, wheat, and corn in Virginia, Maryland, and North Carolina, and of rice and indigo (a blue dye) in SouthCarolina and Georgia. There was a large demand for these crops in Europe. These crops were cultivated with the help of black slaves imported from Africa. The whiteplanter class in the South was the most powerful, both politically and economically. C2 The North Wheat was the main cash crop of the mid-Atlantic colonies...