972 résultats pour "called"

• Lua (Lua Mater) Roman An old goddess who was called upon in war to destroy the enemy's weapons.

• Number Systems I INTRODUCTION Number Systems, in mathematics, various notational systems that have been or are being used to represent the abstract quantities called numbers.

• man in the other room called again, this time extremely loudly, like he was desperate, but she didn't pay any attention, ike she didn't hear it, or didn't care.

  panicky, andsometimes they'drun.They remembered hundredsofcalls. Thousands. Theremight noteven bealimit. Isn't thatfascinating?" "Itis." "Because what's really fascinating isthat she'd playthecall ofadead elephant toits family members." "And?""Theyremembered." "Whatdidthey do?" "They approached thespeaker." "I wonder whattheywere feeling." "Whatdoyou mean?" "Whentheyheard thecalls oftheir dead, wasitwith lovethat they approached thejeep? Orfear? Oranger?" "Idon't remember." "Didthey charge?" "Id...

• Fairy and Fairy Tale Fairy and Fairy Tale, in folklore, a diminutive supernatural creature, generally in human form, dwelling in an imaginary region called fairyland; and the stories of its interventions through magic in mortal affairs.

• State Gods - Mythology.

  appreciated their help and desired more help as they continued their conquests. The goddess Victoria, who may also have been called by the name Vica Pota, represented victory over the enemy. In commerce as well as in patriotism and warfare, Romans had special gods that they called upon for help. This aspect of their public lives was influenced by their principle gods and gods of specific tasks. Mercury oversaw merchants, and Minerva was the patroness of craftsmen and manufacturers. The goddess F...

• Kidney.

  secretion. An additional function of the kidney is the processing of vitamin D; the kidney converts this vitamin to an active form that stimulates bone development. Several hormones are produced in the kidney. One of these, erythropoietin, influences the production of red blood cells in the bone marrow. When the kidney detectsthat the number of red blood cells in the body is declining, it secretes erythropoietin. This hormone travels in the bloodstream to the bone marrow, stimulating theproducti...

• Rock (mineral).

  pressure mineral assemblage. In a sense, the rock is stuck in a state that is characteristic of its earlier high-temperature and high-pressure environment. Thus,metamorphic rocks carry with them information about the history of temperatures and pressures to which they were subjected. The size, shape, and distribution of mineral grains in a rock are called the texture of the rock. Many metamorphic rocks are named for their main texture. Textures giveimportant clues as to how the rock formed. As t...

• Embryology - biology.

  stage a portion of the minute yolk sac is enclosed in the body of the embryo to form a part of the embryonic alimentary canal. At the beginning of its fourth week theembryo, now about 4 to 5 mm (about 0.16 to 0.2 in) long, has the rudiments of eyes and ears, and each side of the neck shows four gill clefts. A tail is also present. Early in the second month the buds of the arms and legs appear. The major internal organs begin to take shape, and in about the sixth week bones and muscles beginto fo...

• Billiards.

  One of the most important snooker players in history was Joe Davis of England, who retired in 1946 after dominating the game for 20 years. He made runs of 100points or more 687 times. This record was later broken by Australia's Horace Lindrum, whose uncle Walter Lindrum was also a world-class billiards player. The mostsuccessful players in recent years include Ireland’s Ken Doherty, Scotland’s Stephen Hendry, and England’s Steve Davis, Jimmy White, and Mark Williams. IV HISTORY Billiards can b...

• Eukaryote - biology.

  The waste is then expelled through a hole in the fused membrane. In complex animals, cells generate wastes such as urea when nutrients are broken down within cells.These wastes are transported by blood to the kidneys. The kidneys process the waste and produce urine, which is removed from the body through the bladder.Undigested food travels through the tubelike intestines and is eliminated through the digestive system. V EVOLUTIONARY ORIGINS Eukaryotes evolved much later than prokaryotes, whose...

• Leaf - biology.

  The mesophyll, sandwiched between the upper and lower epidermis, consists of many thin-walled cells that are usually arranged in two layers. The palisade layer is next to the upper epidermis. It consists of cylindrical cells that are packed closely together. Next to the palisade layer and making up most of the thickness of the leaf bladeis the spongy layer. The spongy layer consists of roundish cells that are packed loosely together and have numerous air spaces between them. In most plants t...

• 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...

• Legislative Branch.

  popularly elected parliament, composed of one or two chambers. The majority party, or a coalition of parties, agree to form a government, known as the government of the day . Executive power is exercised by a cabinet headed by a chief minister—usually called prime minister, premier, or chancellor—who is typically drawn from the membership of the legislature. Such systems are found throughout western Europe and in countries such as India that were once part of the British Empire. In systems base...

• Endocrine System.

  thermostat. When the heat in a house falls, the thermostat responds by switching the furnace on, and when the temperature is too warm, the thermostat switches thefurnace off. Usually, the change that a hormone produces also serves to regulate that hormone's secretion. For example, parathyroid hormone causes the body toincrease the level of calcium in the blood. As calcium levels rise, the secretion of parathyroid hormone then decreases. This feedback mechanism allows for tight controlover hormon...

• Algerian War of Independence.

  commander. In Paris, General Charles de Gaulle was called to form a new government to save the situation. In June 1958 in Algiers, de Gaulle reassured the colons with the ambiguous phrase, “Je vous ai compris” (“I have understood you”). His September 1958 proposals forgreater Algerian integration into France failed to address the colons’ fears. In September 1958 the FLN created its own Provisional Government of the Algerian Republic(GPRA), with Ferhat Abbas as president. By 1959 de Gaulle realiz...

• Parkinson Disease.

  III SYMPTOMS Parkinson disease most notably affects motor control (muscle activity). The disease progresses differently for each individual—symptoms develop swiftly in some peopleand slowly in others. Some Parkinson patients may develop problems that affect their intellect or ability to reason, or they may suffer from depression or anxiety. A Motor Control Problems Doctors look for the presence of four principal symptoms in patients they suspect may have Parkinson disease. Tremor (the involun...

• William Blake.

  best-known illustrations, popularly known as The Ancient of Days, the frontispiece to his poem Europe, a Prophecy (1794). Much of Blake’s painting was on religious subjects: illustrations for the work of John Milton, his favorite poet (although he rejected Milton’s Puritanism), for JohnBunyan’s Pilgrim’s Progress, and for the Bible, including 21 illustrations to the Book of Job. Among his secular illustrations were those for an edition of Thomas Gray’s poems and the 537 watercolors for Ed...

• Bacteria - biology.

  A2 b Bacterial Killers Some dramatic infectious diseases result from exposure to bacteria that are not part of our normal bacterial community. Cholera, one of the world’s deadliest diseasestoday, is caused by the bacterium Vibrio cholerae . Cholera is spread in water and food contaminated with the bacteria, and by people who have the disease. After entering the body, the cholera bacteria grow in the intestines, often along the surface of the intestinal wall, where they secrete a toxin (poiso...

• 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...

• Thermodynamics I INTRODUCTION Thermodynamics, field of physics that describes and correlates the physical properties of macroscopic systems of matter and energy.

  Carnot EngineThe idealized Carnot engine was envisioned by the French physicist Nicolas Léonard Sadi Carnot, who lived during theearly 19th century. The Carnot engine is theoretically perfect, that is, it converts the maximum amount of energy intomechanical work. Carnot showed that the efficiency of any engine depends on the difference between the highest andlowest temperatures reached during one cycle. The greater the difference, the greater the efficiency. An automobileengine, for example, wou...

• Heredity - biology.

  allele from the mother and a mutated allele from the father. In both of these cases, the child will be a carrier. The child develops the disease only if he or she receives amutated allele from each parent. When both parents are carriers, there is a 25 percent chance that a child will be disease-free, a 25 percent chance that it will have thedisease, and a 50 percent chance that it will be a carrier. Examples of genetic diseases that follow the dominant-recessive pattern include sickle-cell anemi...

• William Blake I INTRODUCTION William Blake (1757-1827), English poet, painter, and engraver, who created an unusual form of illustrated verse; his poetry, inspired by mystical vision, is among the most original, lyric, and prophetic in the language.

  Your spring & your day are wasted in play,And your winter and night in disguise. Both series of poems take on deeper resonances when read in conjunction. Innocence and Experience, “the two contrary states of the human soul,” are contrasted insuch companion pieces as “The Lamb” and “The Tyger.” Blake’s subsequent poetry develops the implication that true innocence is impossible without experience,transformed by the creative force of the human imagination. III BLAKE AS ARTIST The LambThe Lamb...

• Nova - astronomy.

  When first discovered, the spectrum of a nova shows that the expanding layers of gas that cause the brightening have temperatures of 40,000° to 50,000° C (70,000°to 90,000° F)—about eight times as hot as the surface of the Sun. By the time a nova reaches maximum brightness, the temperature of the material has fallen to about10,000° C (about 20,000° F), or lower. Just after maximum brightness, the escaping cloud of gas cools and expands enough to become transparent. This transparency allows astro...

• Golf. I INTRODUCTION Golf, outdoor game in which individual players use specially designed

  caddie or caddy. (Caddies, once an integral feature of the game, have now been replaced on many courses by motorized carts and pull carts.) In England the game was made popular by the attention given it by James VI of Scotland, later James I of England, and his son Charles I. In the 18th century the first golf associations were established. They included the Honourable Company of Edinburgh Golfers (founded 1744) in Edinburgh, Scotland;the Saint Andrews Society of Golfers (1754) in Saint Andrew...

• Bird. I INTRODUCTION Bird, animal with feathers and wings. Birds are the only

  B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...

• Bird - biology.

  B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...

• Joseph Stalin I INTRODUCTION Joseph Stalin (1879-1953), general secretary of the Communist Party

  V FOREIGN POLICIES Although Stalin’s policy in the mid-1930s was to support the Communist International (Comintern) in forming a popular front against the rise of fascism in Europe, hegave up the idea of collective security with the West and in August 1939 decided upon an alliance with Nazi Germany. The “Secret Protocols” of the German-SovietNonaggression Pact carved up Eastern Europe into German and Soviet spheres of influence; the Soviets allowed Germany to invade Poland in exchange for Hitle...

• Joseph Stalin.

  V FOREIGN POLICIES Although Stalin’s policy in the mid-1930s was to support the Communist International (Comintern) in forming a popular front against the rise of fascism in Europe, hegave up the idea of collective security with the West and in August 1939 decided upon an alliance with Nazi Germany. The “Secret Protocols” of the German-SovietNonaggression Pact carved up Eastern Europe into German and Soviet spheres of influence; the Soviets allowed Germany to invade Poland in exchange for Hitle...

• Joseph Stalin .

  V FOREIGN POLICIES Although Stalin’s policy in the mid-1930s was to support the Communist International (Comintern) in forming a popular front against the rise of fascism in Europe, hegave up the idea of collective security with the West and in August 1939 decided upon an alliance with Nazi Germany. The “Secret Protocols” of the German-SovietNonaggression Pact carved up Eastern Europe into German and Soviet spheres of influence; the Soviets allowed Germany to invade Poland in exchange for Hitle...

• Anxiety.

  A Genetics and Neurobiology Studies suggest that anxiety disorders run in families. That is, children and close relatives of people with disorders are more likely than most to develop anxietydisorders. Some people may inherit genes that make them particularly vulnerable to anxiety. These genes do not necessarily cause people to be anxious, but the genesmay increase the risk of anxiety disorders when certain psychological and social factors are also present. Anxiety also appears to be related to...

• Radar.

  gathers the weak returning radar signals and converts them into an electric current. Because a radar antenna may both transmit and receive signals, the duplexerdetermines whether the antenna is connected to the receiver or the transmitter. The receiver determines whether the signal should be reported and often does furtheranalysis before sending the results to the display. The display conveys the results to the human operator through a visual display or an audible signal. B1 The Antenna The rec...

• Valley - geography.

  B Longitudinal Profile A graph of the slope of a river channel at each point along its course is called a longitudinal profile . In most cases, the slope of a river becomes less steep as it flows from its headwaters to the ocean. Slopes as high as 200 m/km (1000 ft/mi) can be found in mountainous terrain, but slopes of about 2 m/km (10 ft/mi) are more typical in themiddle section of such valleys. Slopes as low as 2 cm/km (1 in/mi) can be found in rivers close to the ocean. In most rivers there...

• 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...

• Modern Art I INTRODUCTION American Gothic American Gothic was painted by the 20th-century American artist Grant Wood in 1930.

  while at the other side a woman in black appears to mourn the end of her participation in the dance. Click on the buttonsto learn more.© Microsoft Corporation. All Rights Reserved. In view of this diversity, it is difficult to define modern art in a way that includes all of 20th-century Western art. For some critics, the most important characteristic ofmodern art is its attempt to make painting and sculpture ends in themselves, thus distinguishing modernism from earlier forms of art that had con...

• Bowling.

  In each of the first nine frames the bowler rolls one or two balls. If the bowler knocks down all ten pins with the first ball, he or she has rolled a strike, the best roll possible. An X is recorded on the scoresheet or screen, and the bowler receives ten points (the number of pins knocked down) plus a bonus of the number of pins thebowler knocks down in his or her next two bowls. The maximum possible score in a strike frame, therefore, is 30: the strike followed by two more strikes on subseq...

• Electron I INTRODUCTION Models of the Atom Once scientists discovered the electron, they set out to explain how electrons behave in atoms.

  Electron Density and Orbital ShapesAtomic orbitals are mathematical descriptions of where the electrons in an atom (or molecule) are most likely to be found.These descriptions are obtained by solving an equation known as the Schrödinger equation, which expresses ourknowledge of the atomic world. As the angular momentum and energy of an electron increases, it tends to reside indifferently shaped orbitals. The orbitals corresponding to the three lowest energy states are s, p, and d, respectively....

• Folktales I INTRODUCTION "Little Red Riding Hood" The popular children's story "Little Red Riding

  seemed important to them. Thus, the Grimms postulated a common Indo-European origin for folktales, and the German philologist Theodor Benfey as well as theScottish writer William Clouston believed that stories diffused by way of travelers migrating east and west from India. Such theories, however, have proven incompleteand inadequate. Nevertheless, the research of these and other scholars greatly stimulated interest in folklore and folktales. The German scholar Max Muller held thatmyths originat...

• Ancient Greece - history.

  Palace of KnossosThe ancient city of Knossos was a center of the Minoan civilization, an advanced society on Crete named after Minos, a legendaryCretan king. Skilled in such fields as engineering and architecture, the Minoans constructed the palace at Knossos in 1700 bc. Aserious fire at least three centuries later caused the collapse of the palace and foreshadowed the subsequent decline of the city.Wolfgang Kaehler Settlers had begun sailing from Asia Minor to Crete about 6000 BC because the i...

• Vikings .

  Wessex (England) and Charles II the Bald and Louis III in France could command their resources to move to fortify their towns, station fleets and naval patrols alongthe coasts, and organize localized and mobile military forces. Some Christian leaders paid ransom to the larger Viking armies of the 10th and early 11th centuries.Taxing their people to pay the “danegeld,” the tribute to the Vikings, became a regular defensive strategy. But in return for the cash, the Vikings often negotiatedpeaceful...

• Missouri - geography.

  Saint Francois Mountains, at the eastern end of the crest of the dome. Only in these mountains have the sedimentary rocks been sufficiently eroded away so that theunderlying igneous rocks are exposed. They form the rounded, knoblike peaks of an old mountain range. The peaks project, in isolation or in clusters, between 230 and300 m (750 and 1,000 ft) above the surrounding sedimentary basins. One of these knobs, Taum Sauk Mountain, reaches 540 m (1,772 ft) above sea level and is thehighest point...

• Missouri - USA History.

  Saint Francois Mountains, at the eastern end of the crest of the dome. Only in these mountains have the sedimentary rocks been sufficiently eroded away so that theunderlying igneous rocks are exposed. They form the rounded, knoblike peaks of an old mountain range. The peaks project, in isolation or in clusters, between 230 and300 m (750 and 1,000 ft) above the surrounding sedimentary basins. One of these knobs, Taum Sauk Mountain, reaches 540 m (1,772 ft) above sea level and is thehighest point...

• Lewis and Clark Expedition.

  took a small detachment into present-day north central Montana, thinking that the course of the Marias River might provide an American claim to fur-rich country inwhat is now the Canadian province of Alberta. In August the groups reunited on the Missouri River, near the mouth of the Yellowstone. They arrived in St. Louis onSeptember 23, 1806. C Relations with the Native Americans and Spanish The Lewis and Clark Expedition made a journey through the homelands of native people. What American expl...

• Lewis and Clark Expedition - explorer.

  took a small detachment into present-day north central Montana, thinking that the course of the Marias River might provide an American claim to fur-rich country inwhat is now the Canadian province of Alberta. In August the groups reunited on the Missouri River, near the mouth of the Yellowstone. They arrived in St. Louis onSeptember 23, 1806. C Relations with the Native Americans and Spanish The Lewis and Clark Expedition made a journey through the homelands of native people. What American expl...

• North Carolina - geography.

  The drainage divide in North Carolina follows the Blue Ridge range on the eastern margin of the mountain region. This is called the “Eastern Continental Divide.” West ofthis divide, rivers drain into the Mississippi River through the Tennessee River and other tributaries of the Ohio River. The French Broad, the largest, and the LittleTennessee flow into the Tennessee River. The New River flows into the Kanawha River of West Virginia which in turn flows into the Ohio River. Most of the state’s ri...

• North Carolina - USA History.

  The drainage divide in North Carolina follows the Blue Ridge range on the eastern margin of the mountain region. This is called the “Eastern Continental Divide.” West ofthis divide, rivers drain into the Mississippi River through the Tennessee River and other tributaries of the Ohio River. The French Broad, the largest, and the LittleTennessee flow into the Tennessee River. The New River flows into the Kanawha River of West Virginia which in turn flows into the Ohio River. Most of the state’s ri...

• Kentucky - geography.

  The climate of Kentucky is characterized by warm or hot summers and cool winters. Throughout the year, temperatures do not vary greatly from place to place,although they are generally slightly lower in the Appalachian Plateaus region than elsewhere in the state. Average July temperatures are usually from 24° to 27°C (76°to 80°F) in the central and western areas and from 23° to 24°C (74° to 76°F) in the east. January averages range from below 1°C (34°F) in the northern Bluegrassregion to more tha...

• Kentucky - USA History.

  The climate of Kentucky is characterized by warm or hot summers and cool winters. Throughout the year, temperatures do not vary greatly from place to place,although they are generally slightly lower in the Appalachian Plateaus region than elsewhere in the state. Average July temperatures are usually from 24° to 27°C (76°to 80°F) in the central and western areas and from 23° to 24°C (74° to 76°F) in the east. January averages range from below 1°C (34°F) in the northern Bluegrassregion to more tha...

• Evolution - biology.

  genetic diversity to extinction. Sexual reproduction ensures that the genes in a population are rearranged in each generation, a process termed recombination. Although the combinations of genes inindividuals change with each new generation, the gene frequency, or ratio of different alleles in the entire population, remains relatively constant if no evolutionaryforces act on the population. One such force is the introduction of new genes into the genetic material of the population, or gene pool...

• Kiribati - country.

  mainly from Japan, the European Union (EU), and Australia. Kiribati’s only major exports are copra (dried coconut meat), cultivated seaweed, and fish. The United States, Australia, and New Zealand are the leading purchasers ofthe country’s exports. Despite the cultivation of crops for local consumption, Kiribati is heavily dependent upon imported foods. Other imports include machinery andequipment, manufactured goods, and imported fossil fuels, which supply most of the country’s energy. Australi...

• God. I INTRODUCTION God, the center and focus of religious faith, a holy

  C Islam Islam arose as a powerful reaction against the ancient pagan cults of Arabia, and as a consequence it is the most starkly monotheistic of the three biblically rootedreligions. The name Allah means simply “the God.” He is personal, transcendent, and unique, and Muslims are forbidden to depict him in any creaturely form. The primary creed is that “There is no god but Allah, and Muhammad is the apostle of Allah.” Allah has seven basic attributes: life, knowledge, power, will, hearing, se...