710 résultats pour "rater"

• Global Warming.

  some of the warming influence of increasing greenhouse gases. A1 Carbon Dioxide Carbon dioxide is the second most abundant greenhouse gas, after water vapor. Carbon dioxide constantly circulates in the environment through a variety of naturalprocesses known as the carbon cycle. It is released into the atmosphere from natural processes such as eruptions of volcanoes; the respiration of animals, whichbreathe in oxygen and exhale carbon dioxide; and the burning or decay of plants and other organic...

• roman noir français - littérature.

  noire » qui, à sa création en 1945, accueille principalement des auteurs américains — avec toutefois quelques belles exceptions, puisque Serge Arcouët y signe la Mort et l’Ange (1948), sous le pseudonyme de Terry G. Stewart. Parmi la pléthore de romans noirs publiés durant cette période, il faut également citer Ainsi soit-il (1948) de Maurice Raphael (pseudonyme d’Ange Bastiani), et le Bon Dieu s’en fout (1948) d’André Héléna. 7 LES TRUANDS DES ANNÉES CINQUANTE Exception faite des roman...

• comportement animal.

  Cette réponse appartient à un groupe particulier de programmes moteurs : les modèles d'action fixe. La complexité de ces programmes ne semble connaître aucune limite,comme le démontrent les nids d'oiseaux ou les magnifiques toiles des araignées épeires. Une autre catégorie de programmes moteurs requiert un apprentissage. Par exemple, un humain doit mobiliser toute son attention pour apprendre à marcher, à nager, àlacer ses chaussures ou à rouler à bicyclette. Ces activités deviennent rapidement...

• Bevölkerung - Soziologie.

  Um 1950 begann eine neue Phase des Bevölkerungswachstums, als man Hungersnöte und Krankheiten selbst in Agrargesellschaften mit niedrigem Bildungsniveau derBevölkerung überwinden konnte. Dies wurde möglich durch geringe Kosten für die Importe von Impfstoffen ( siehe Immunisierung), Antibiotika, Insektiziden und ertragreichem Saatgut, die seit den fünfziger Jahren produziert wurden. Die Verbesserungen der Wasserversorgung, Abwassersysteme und Transportwege führten zusteigenden Ernteerträgen. Gle...

• Republic of the Congo - country.

  rate of 50 CFA francs equal to 1 French franc was in force from 1948 to 1994, when the CFA franc was devalued by 50 percent. The leading commercial banks are theBanque Internationale du Congo and the Union Congolaise de Banques. E Foreign Trade In 2000 imports cost $930 million and exports earned $2.09 billion. The Congo engages in considerable trade with the nearby countries of Cameroon, the CentralAfrican Republic, and Gabon, with which it is joined in the Customs and Economic Union of Centra...

• Automation.

  Not all industries require the same degree of automation. Agriculture, sales, and some service industries are difficult to automate. The agriculture industry may becomemore mechanized, especially in the processing and packaging of foods; however, in many service industries such as supermarkets, for example, a checkout countermay be automated and the shelves or supply bins must still be stocked by hand. Similarly, doctors may consult a computer to assist in diagnosis, but they must makethe final...

• Hinduism.

  they do not share any basic terms. B Sanātana Dharma Evidence from inscriptions indicates that Hindus had begun to use the word dharma for their religion by the 7th century. After other religions of Indian origin also began to use this term, Hindus then adopted the expression san ātana dharma to distinguish their dharma from others. The word san ātana, meaning immemorial as well as eternal, emphasized the unbroken continuity of the Hindu tradition in contrast to the other dharmas . The Bu...

• Los Angeles - geography.

  size and population) among all the cities in Los Angeles County. It is irregular in shape because it has grown over the years through the annexation of surrounding territoryand cities. The city proper is shaped like a lighted torch, its narrow handle extending north from the Port of Los Angeles to downtown Los Angeles, and its flames flickeringirregularly to the north, west, and northwest. Several separate cities—such as Beverly Hills, Santa Monica, and Culver City—are partly or completely surro...

• Asia - Geography.

  Borneo, the world’s third largest island after Greenland and New Guinea. To the southeast is the Timor Sea separating the Asian island of Timor from the Australiancontinent. The Indian subcontinent is flanked by the Bay of Bengal on the east and the Arabian Sea on the west. The island of Sri Lanka and the much smaller Maldives andNicobar Islands trail away to the south. The Arabian Sea’s Gulf of Aden, the Red Sea, the Mediterranean Sea, and the Black Sea form an arc along the western rim of Asia...

• Asia - History.

  Borneo, the world’s third largest island after Greenland and New Guinea. To the southeast is the Timor Sea separating the Asian island of Timor from the Australiancontinent. The Indian subcontinent is flanked by the Bay of Bengal on the east and the Arabian Sea on the west. The island of Sri Lanka and the much smaller Maldives andNicobar Islands trail away to the south. The Arabian Sea’s Gulf of Aden, the Red Sea, the Mediterranean Sea, and the Black Sea form an arc along the western rim of Asia...

• Leukemia.

  leukemia, and normal or mildly decreased in chronic lymphocytic leukemia. Nearly all chronic leukemia patients have increased white cell counts. In chronic myelocyticleukemia, some of these leukemic white cells are capable of functioning as normal cells do by fighting infectious microbes. Hence, infection is no more common than in ahealthy individual. In chronic lymphocytic leukemia the blood contains large numbers of malignant lymphocytes that do not function normally. Normal lymphocytescoexist...

• Africa.

  The highest elevations in Africa are found in the various ranges of East Africa. After Kilimanjaro, the next highest peaks are Mount Kenya (5,199 m/17,057 ft), north ofKilimanjaro in central Kenya; Margherita Peak (5,109 m/ 16,762 ft) in the Ruwenzori Range on the border between Uganda and the Democratic Republic of the Congo(DRC); Ras Dashen (4,620 m/ 15,157 ft) in the Ethiopian Highlands of northern Ethiopia; Mount Meru (4,565 m/ 14,977 ft), close to Kilimanjaro in Tanzania; and MountElgon (4,...

• Africa - Geography.

  The highest elevations in Africa are found in the various ranges of East Africa. After Kilimanjaro, the next highest peaks are Mount Kenya (5,199 m/17,057 ft), north ofKilimanjaro in central Kenya; Margherita Peak (5,109 m/ 16,762 ft) in the Ruwenzori Range on the border between Uganda and the Democratic Republic of the Congo(DRC); Ras Dashen (4,620 m/ 15,157 ft) in the Ethiopian Highlands of northern Ethiopia; Mount Meru (4,565 m/ 14,977 ft), close to Kilimanjaro in Tanzania; and MountElgon (4,...

• Turbine.

  steam turbine has supplanted the reciprocating engine as a prime mover in large electricity-generating plants and is also used as a means of jet propulsion. Steam turbines are used in the generation of nuclear power and in nuclear ship propulsion. They operate with fuel-fired boilers for power generation. In cogenerationapplications requiring both process heat (heat used in an industrial process) and electricity, steam is raised at high pressure in the boiler and extracted from the turbineat th...

• Moscow (city, Russia) - geography.

  V RECREATION About 30 percent of Moscow’s territory is occupied by parks and public gardens, which were important elements of Soviet city planning. Gorky Park, which providesactivities such as amusement rides and boating, sits on the right bank of the Moscow River; the park’s display of a retired Soviet space shuttle dominates the riverside.The Moscow Zoo is located just west of the city center. The Botanical Gardens, administered by the Russian Academy of Sciences, offers a diverse display of...

• Diseases of Animals.

  infected animal. It may also spread in milk or in garbage that contains contaminated meat. Typical symptoms include blisters that appear on the mouth and feet;animals may become lame when their hooves degenerate. Canine distemper is a highly contagious disease caused by the paramyxovirus, which is transmitted in discharges from the nose and eyes. Symptoms begin with fever,malaise, and nasal and ocular discharges and may progress to convulsions and other nervous system disorders. Parvoviruses aff...

• Liberia - country.

  West Atlantic, or Kwa linguistic groups. D Education Education is free and compulsory for children between the ages of 6 and 15. However, a scarcity of educational facilities means that few Liberians progress beyondprimary school. Almost all children of primary school-age attend school, but the figure drops to 23 percent (1999–2000) for secondary school-age children. Just 60percent of the population was literate in 2005. Higher education is provided by the University of Liberia (1862), in Monro...

• Japan - country.

  island’s fertile soils support agriculture and provide the vast majority of Japan’s pasturelands. In addition, Hokkaidō contains coal deposits, and the cold currents off itsshores supply cold-water fish. Winters are long and harsh, so most of Hokkaid ō is lightly settled, housing about 5 percent of Japan’s population on approximately 20 percent of its land area. However,its snowy winters and unspoiled natural beauty attract many skiers and tourists. Hokkaid ō is thought of as Japan’s northern fr...

• Somalia - country.

  A Agriculture Livestock raising is the principal occupation in Somalia. The size of livestock herds began to recover in the mid-1990s after falling during the country’s civil war. Sheepand goats are the most numerous livestock, with smaller numbers of cattle. The principal crops grown are corn, sorghum, sugarcane, cassava, and bananas. B Forestry and Fishing While most wood is cut for fuel, Somalia’s major forestry export products before the 1990s were frankincense and myrrh. Fish is an import...

• Canada.

  Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...

• Canada - country.

  Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...

• Canada - Canadian History.

  Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...

• Book Publishing I INTRODUCTION Book Publishing, manufacture, publication, and distribution of books.

  they use advanced printers and binding techniques to run off as many books as required. Printing only as many books as needed allows companies to save money, andbeing able to store books digitally means that books can be printed whenever necessary, keeping them in print indefinitely. B Marketing and Distribution Once the book has been made, it is ready for distribution. Traditionally, trade books have been sold primarily by salespeople calling on bookstores across the countryand taking orders f...

• Weather.

  hours, and the snow can be much deeper in places where the wind piles it up in drifts. Extraordinarily deep snows sometimes accumulate on the upwind side ofmountain slopes during severe winter storms or on the downwind shores of large lakes during outbreaks of polar air. VI WIND Wind is the horizontal movement of air. It is named for the direction from which it comes—for example, a north wind comes from the north. In most places near theground, the wind speed averages from 8 to 24 km/h (from 5...

• France - country.

  In both the Paris and Aquitaine basins, fertile soils derived from limestone and wind-deposited dust, called loess, have supported prosperous agriculture since ancienttimes. Other lowlands in France are scattered and relatively small. They include the Alsace Plain in the east, bordering Germany, the valley of the Rhône River in thesoutheast, and the Languedoc Plain along the Mediterranean coast. A2 Uplands France contains several regions of uplands, the worn down remains of ancient mountain sys...

• India - geografía.

  valiosas de madera, entre ellas la teca. En las tierras bajas pantanosas hay grandes regiones de jungla impenetrable y también a lo largo de las laderas bajas de los Ghatesoccidentales. La vegetación del Decán es menos exuberante, pero a través de toda la península se pueden encontrar espesuras de bambú, palmera y árboles caducifolios. Las selvas, llanuras, colinas y montañas de la India están habitadas por gran variedad de vida animal. Los felinos están bien representados, con tigres y panteras...

• 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...

• James Polk.

  1824. Jackson had won a plurality of the popular and electoral votes. But because he lacked a majority of the electoral votes, the House of Representatives had todecide the election among the three candidates with the highest number of electoral votes. When Henry Clay, the candidate who had come in fourth, swung his supportto Adams, Adams won the election. Polk, with his firm belief in democratic rule, held that the election of Adams was a violation of the people's will. In his first speech befo...

• James Polk

  1824. Jackson had won a plurality of the popular and electoral votes. But because he lacked a majority of the electoral votes, the House of Representatives had todecide the election among the three candidates with the highest number of electoral votes. When Henry Clay, the candidate who had come in fourth, swung his supportto Adams, Adams won the election. Polk, with his firm belief in democratic rule, held that the election of Adams was a violation of the people's will. In his first speech befo...

• La fontaine

• Volcano.

  before eruption. Very violent explosive eruptions are called Plinian eruptions, after Roman naturalist Pliny the Elder. These eruptions can last for several hours to daysand eject a large amount of pyroclastic material. Some volcanoes can produce much more energetic eruptions that eject materials farther from the vents because oftheir andesitic and dacitic composition. Andesitic and dacitic lava is generally thicker than basaltic lava. Stiff lava generally produces more-explosive eruptions. B No...

• Skin. I INTRODUCTION Skin, outer body covering of an animal. The term skin

  III SKIN APPENDAGES In humans, the skin appendages, or structures embedded in the skin, include hair, nails, and several types of glands. Glands are groups of cells that produce andsecrete substances needed by other parts of the body. In other vertebrates, the skin appendages include scales (in fish and reptiles) and feathers (in birds). Together,the skin and the skin appendages are known as the integumentary system of the body. A Hair Hair is a distinguishing characteristic of mammals, a gro...

• 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...

• Supernova - astronomy.

  The term hypernova has been proposed for an extremely massive core-collapse supernova—possibly more than 100 times the mass of the Sun. A hypernova is thought to form a black hole. Just before it explodes, a hypernova may release a huge burst of gamma rays in a jet from the rotating black hole at its center. These jets mayexplain the so-called long gamma-ray bursts detected by astronomers. According to some researchers, massive stars with over 40 solar masses may sometimescollapse directly int...

• Elephant - biology.

  B Trunk An elephant's nose and upper lip are combined in a long, limber trunk, an exceptionally supple appendage with an estimated 150,000 muscles. The versatile trunk actslike a hand for grasping low-growing shrubs and other food and placing it into the mouth; an arm for breaking off tree branches; or a snorkel for breathing when theelephant's body is submerged. Elephants also use their trunks to suck up water and squirt it into their mouths for drinking or over their bodies for bathing. Nostr...

• Animal Behavior - biology.

  The first motor program analyzed in much detail was the egg-rolling response of geese. When a goose sees an egg outside its nest, it stares at the egg, stretches itsneck until its bill is just on the other side of the egg, and then gently rolls the egg back into the nest. At first glance this seems a thoughtful and intelligent piece ofbehavior, but it is a mechanical motor program; almost any smooth, rounded object (the sign stimulus) will release the response. Furthermore, removal of the egg on...

• Prison.

  Furthermore, experts disagree about whether imprisoning criminals actually prevents further crime. Some critics charge that American prisons simply warehouseviolence—meaning that U.S. prison inmates are confined and incapacitated in large numbers, with little or no effort made to rehabilitate them. Critics have labeled theresult of this process turnstile justice, referring to the fact that most inmates are chronic and persistent offenders and return to prison following conviction for new crime...

• Lithuania - country.

  pollution. III PEOPLE Ethnic Lithuanians constitute about 80 percent of the country’s population. The proportion of Lithuanians increased slightly in the first years after the dissolution of theSoviet Union—many Lithuanians returned to their homeland from that country and abroad while some Russians, Ukrainians, and Belarusians left the country. Russiansand Poles constitute the country’s largest minority groups, each accounting for roughly 7 percent of the population. Jews were the largest mino...

• United States History - U.

  and improved upon the designs of Arab sailing ships and learned to mount cannons on those ships. In the 15th century they began exploring the west coast ofAfrica—bypassing Arab merchants to trade directly for African gold and slaves. They also colonized the Madeira Islands, the Azores, and the Cape Verde Islands andturned them into the first European slave plantations. The European explorers were all looking for an ocean route to Asia. Christopher Columbus sailed for the monarchs of Spain in 149...

• United States History - U.

  and improved upon the designs of Arab sailing ships and learned to mount cannons on those ships. In the 15th century they began exploring the west coast ofAfrica—bypassing Arab merchants to trade directly for African gold and slaves. They also colonized the Madeira Islands, the Azores, and the Cape Verde Islands andturned them into the first European slave plantations. The European explorers were all looking for an ocean route to Asia. Christopher Columbus sailed for the monarchs of Spain in 149...

• Automobile Racing.

  beginning in 1906 at Le Mans it came to refer to the principal F1 auto race in a given nation, except in the United States, where the term continues to be used lessdiscriminately. After the end of World War I in 1918, when automobile racing blossomed internationally, a series of GP races in several nations became reserved for F1competition, and an annual GP calendar was developed consisting of national races, such as the French Grand Prix and the British Grand Prix. An annual award calledthe Wor...

• Bear - biology.

  programs sponsored by zoos or other breeding centers have attempted to breed giant pandas in captivity, although most of these programs have proved unsuccessful.Among the difficulties faced by captive breeders has been the problem of encouraging a female giant panda to mate with a selected male during the two to three daysof the year when she is most fertile, a period known as estrus. B Spectacled Bear Creamy-white rings surrounding the eyes give the spectacled bear its name. Its shaggy coat of...

• Latvia - country.

  The population of Latvia is about 2,245,423 (2008 estimate), yielding an average population density of 35 persons per sq km (91 per sq mi). Latvia is highly urbanized.Some 66 percent of the population lives in urban areas, with nearly one-third of the total population residing in the capital, Rīga. Other important cities includeDaugavpils, an industrial center in the southeast, on the Daugava River; Liep āja, an important port on the Baltic Sea; Jelgava, an industrial center near Rîga; J ūrmala,...

• Finland - country.

  Productive forestland is the most valuable natural resource of Finland. Spruce, pine, and silver birch are the principal trees used to manufacture wood and pulp andpaper products. Finland lacks coal and petroleum resources and is a net importer of energy resources. However, Finland does have significant deposits of peat, which is cut from thenumerous peat bogs that cover much of the north. Peat is an important heat source for homes, and it provides about 7 percent of Finland’s electricity needs....

• Dominican Republic - country.

  Manatees and sea turtles also live in Dominican waters. Common birds include blue herons, glossy ibis, flamingos, and brown pelicans. E Environmental Issues Urban dwellers of the Dominican Republic enjoy good access to safe water, but rural communities do not. While current water use is low relative to available resources,water shortages do occur. Although deforestation was once a serious problem in the Dominican Republic, by the beginning of the 21st century, the annual rate of deforestation h...

• Blacks in Latin America.

  Throughout Latin America and the Caribbean the slave population declined at the astonishing rate of 2 to 4 percent a year; thus, by the time slavery was abolished, theoverall slave population in many places was far less than the total number of slaves imported. The British colony of Jamaica, for example, imported more than 600,000slaves during the 18th century; yet, in 1838, the slave population numbered little more than 300,000. The French colony of Saint-Domingue (present-day Haiti)imported mo...

• China - country.

  North China lies between the Mongolian Steppe on the north and the Yangtze River Basin on the south. It stretches west from the Bo Hai gulf and the Yellow Sea to theeastern edge of the Tibetan Plateau. Administratively, North China includes Beijing and Tianjin municipalities; Shandong and Shanxi provinces; most of Hebei, Henan,and Shaanxi provinces; and portions of Ningxia Hui Autonomous Region and of Jiangsu, Anhui, and Gansu provinces. Humans have lived in the agriculturally rich region of Nor...

• Haiti - country.

  Haitian Creole and French are the official languages of Haiti. Haitian Creole, a French-based Creole with influences from West African languages, was made an officiallanguage under the 1987 constitution. It is the mother tongue for nearly the entire population of Haiti and the language of instruction in schools. French is spokenmainly as a second language by a small section of the population. B Religion About 80 percent of Haiti’s people are nominal Roman Catholics, many of them combining an Af...

• Johann Sebastian Bach.

  from his duties, and even tossed him into jail for “too obstinately requesting his dismissal.” But after several weeks the duke saw it was of no use and let him go. E Köthen: 1717-1723 Bach’s new employer, Leopold, loved and understood music and could play the violin, viola da gamba, and harpsichord as well as sing bass. The prince held Bach in highregard and stood as godfather for his seventh child. Bach, in turn, named the child Leopold August in his employer’s honor. Bach later said that the...

• French Canadian Nationalism - Canadian History.

  The revolution ended in independence for the Americans, who named their new country the United States of America. In the aftermath, thousands of people who hadopposed the American Revolution migrated from what was now the United States to British North America. These people, known as the United Empire Loyalists, settledin the Maritimes, where they greatly increased the British majority over the Acadians, and in Québec. Some settled near francophone communities around Montréal andin the Eastern T...