852 résultats pour "wélé"

• Zimbabwe - country.

  contamination—especially from the dieldrin and DDT used in tsetse fly control—has significantly affected wildlife and human health. III PEOPLE AND SOCIETY OF ZIMBABWE In 2008 Zimbabwe’s population was estimated to be 12,382,920, giving the country a population density of 32 persons per sq km (83 per sq mi). With a birth rate of27 per 1,000 and a death rate of 22 per 1,000, Zimbabwe’s population growth rate is 0.6 percent. Life expectancy at birth was estimated at 40 years in 2008, downfrom 59...

• Segregation in the United States - U.

  acts of discrimination. Writing for the court, Justice Joseph Bradley declared: “When a man has emerged from slavery, and by the aid of beneficent legislation ... theremust be some stage in the progress of his elevation when he takes the rank of a mere citizen, and ceases to be the special favorite of the laws, and when his rights as acitizen, or a man, are to be protected in the ordinary modes by which other men’s rights are protected.” Rather than being the “special favorites” of the law, blac...

• British Columbia - Geography.

  hemlock, Douglas fir, Sitka spruce, and various cedars, grows rapidly in the mild, wet climate and produces the largest trees in Canada. In the dry lowlands of thesouthern and central interior, ponderosa and lodgepole pines, aspen, and bunchgrass are characteristic. Spruce dominates the Prince George region. Prairie grasses andstands of aspen are found in the northeastern corner of the province. At elevations higher than about 1,800 m (about 6,000 ft), an alpine vegetation of shrubs, mosses,and...

• British Columbia - Canadian History.

  hemlock, Douglas fir, Sitka spruce, and various cedars, grows rapidly in the mild, wet climate and produces the largest trees in Canada. In the dry lowlands of thesouthern and central interior, ponderosa and lodgepole pines, aspen, and bunchgrass are characteristic. Spruce dominates the Prince George region. Prairie grasses andstands of aspen are found in the northeastern corner of the province. At elevations higher than about 1,800 m (about 6,000 ft), an alpine vegetation of shrubs, mosses,and...

• Excerpt from Pericles - anthology.

  To any. LYSIMACHUS. Yet let me obtain my wish. Helicanus draws a curtain revealing Pericles lying on a couch HELICANUS. Behold him. This was a goodly person, Till the disaster that one mortal nightDrove him to this. LYSIMACHUS. Sir King, all hail! The gods preserve you!Hail, royal sir! HELICANUS. It is in vain. He will not speak to you. LORD. Sir,We have a maid in Mytilene, I durst wager, Would win some words of him. LYSIMACHUS. 'Tis well bethought.She questionless, with her sweet harmonyA...

• 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...

• From David Copperfield - anthology.

  To this my mother returned, “Certainly, my dear Jane,” and said no more. I felt apprehensive that I was personally interested in this dialogue, and sought Mr. Murdstone's eye as it lighted on mine. “Now, David,” he said—and I saw that cast again, as he said it—”you must be far more careful to-day than usual.” He gave the cane another poise, and anotherswitch; and having finished his preparation of it, laid it down beside him, with an expressive look, and took up his book. This was a...

• Excerpt from Bleak House - anthology.

  patience, courage, hope; so overthrows the brain and breaks the heart; that there is not an honourable man among its practitioners who would not give—who does notoften give—the warning, 'Suffer any wrong that can be done you, rather than come here!' Who happen to be in the Lord Chancellor's court this murky afternoon besides the Lord Chancellor, the counsel in the cause, two or three counsel who are never inany cause, and the well of solicitors before mentioned? There is the registrar below...

• 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...

• Jazz I INTRODUCTION Joshua Redman Saxophonist Joshua Redman, a graduate of Harvard University, became a fast-rising star in jazz in the 1990s.

  performed a highly produced, jazz-inspired form of blues that was popular in traveling minstrel shows and vaudeville. Thisexample is from the song “St. Louis Blues,” written by American composer and trumpet player W. C. Handy in 1914 andrecorded by Smith in 1925."St. Louis Blues" performed by Bessie Smith, from The Riverside History of Classic Jazz (Cat.# Riverside RB-005) Riverside Records under master license to Fantasy, Inc. All rightsreserved./Frank DriggsCollection/Archive Photos Jazz is ro...

• First Americans.

  bones and artifacts helped 19th-century archaeologists establish the age of ancient human encampments in Europe. Yet, search as they might, American archaeologists found no comparable evidence of a Pleistocene-era human presence. But several sites revealed stone artifacts thatsome scholars believed looked similar to the ancient stone tools found in Europe. On the basis of this similarity, these experts claimed the American artifacts must be asold. By the 1890s, however, other scholars had challe...

• First Americans - Canadian History.

  bones and artifacts helped 19th-century archaeologists establish the age of ancient human encampments in Europe. Yet, search as they might, American archaeologists found no comparable evidence of a Pleistocene-era human presence. But several sites revealed stone artifacts thatsome scholars believed looked similar to the ancient stone tools found in Europe. On the basis of this similarity, these experts claimed the American artifacts must be asold. By the 1890s, however, other scholars had challe...

• Telephone.

  digits is dialed. The development of inexpensive and reliable amplification provided by the introduction of the transistor in the 1960s made practical the design of adialing system based on the transmission of relatively low power tones instead of the higher-power dial pulses. Today most telephones have push buttons instead of a rotary dial. Touch-Tone is an optional service, and telephone companies still maintain the ability to receive pulsedialing. Push-button telephones usually have a switch...

• Western Music I INTRODUCTION Bizet's Carmen Georges Bizet's Carmen, first performed in Paris in 1875, was a milestone in the history of French opera.

  church ceremonies during the period from the 5th to the 7th century. Roman chant became known as Gregorian chant after Pope Gregory I, the Great, who may havecomposed some of the melodies and who actively encouraged an orderly, ritualized use of music by the church. Because Gregory and later popes preferred Gregorianchant to the varieties that had developed elsewhere in Europe, Gregorian chant eventually superseded most of the others. Gregorian and other chant styles arepreserved in many manuscr...

• 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...

• Herbert George WELLS: La Guerre des mondes (Résumé & Analyse)

• La science-fiction est un produit culturel des sociétés industrielles.

  capitalisme désespéré, les Soviétiques se mirent à la traduire. Cela stimula des auteurs tels qu'Alexandre Karantzeff et Nemtsov. Le genre se développa également en Allemagne (Freder Van Holk, Richard Koch) ainsi qu'en Roumanie et en Chine. Le format de la nouvelle, bien adapté aux magazines, s'est largement développé avec de brillants auteurs comme Damon Knight, Richard Matheson, Frederic Brown ou encore James Graham Ballard. De plus en plus estimée par le monde littéraire,...

• From "The Metamorphosis" - anthology.

  As all this was running through his mind at top speed without his being able to decide to leave his bed—the alarm clock had just struck a quarter to seven—therecame a cautious tap at the door behind the head of his bed. 'Gregor,' said a voice—it was his mother's—'it's a quarter to seven. Hadn't you a train to catch?' Thatgentle voice! Gregor had a shock as he heard his own voice answering hers, unmistakably his own voice, it was true, but with a persistent horrible twittering squeakbehind it lik...

• Invertebrate - biology.

  animals with a five-pointed design. They live in the sea and move with the help of tiny fluid-filled feet—another feature found nowhere else in the animal world. Zoologists recognize several different groups of worms. The phylum known as flatworms contains the simplest animals possessing heads. Nerves and sense organs areconcentrated in the head. Most flatworms are paper-thin and live in a variety of wet or damp habitats, including the digestive systems of other animals. Roundwormsrepresent anot...

• Invertebrate - biology.

  animals with a five-pointed design. They live in the sea and move with the help of tiny fluid-filled feet—another feature found nowhere else in the animal world. Zoologists recognize several different groups of worms. The phylum known as flatworms contains the simplest animals possessing heads. Nerves and sense organs areconcentrated in the head. Most flatworms are paper-thin and live in a variety of wet or damp habitats, including the digestive systems of other animals. Roundwormsrepresent anot...

• Pan-Africanism.

  (in New York City). These congresses were attended by increasing numbers of representatives from the United States, Europe, Africa, and the Caribbean. Severalimportant factors affected the growing popularity of the congresses. First, many delegates were sponsored by international labor movements, which were growing insize and power in the 1920s. A second factor was the growth of the black nationalist movement of Marcus Garvey. The Garvey movement was important in the UnitedStates as a popular ex...

• Isaac NewtonIINTRODUCTIONIsaac Newton (1642-1727), English physicist, mathematician, and natural philosopher, considered one of the most important scientists of all time.

  B Calculus (Newton’s “Fluxional Method”) In 1669 Newton gave his Trinity mathematics professor Isaac Barrow an important manuscript, which is generally known by its shortened Latin title, De Analysi . This work contained many of Newton’s conclusions about calculus (what Newton called his “fluxional method”). Although the paper was not immediately published, Barrowmade its results known to several of the leading mathematicians of Britain and Europe. This paper established Newton as one of the...

• Isaac Newton.

  B Calculus (Newton’s “Fluxional Method”) In 1669 Newton gave his Trinity mathematics professor Isaac Barrow an important manuscript, which is generally known by its shortened Latin title, De Analysi . This work contained many of Newton’s conclusions about calculus (what Newton called his “fluxional method”). Although the paper was not immediately published, Barrowmade its results known to several of the leading mathematicians of Britain and Europe. This paper established Newton as one of the t...

• 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...

• Arabic Literature I INTRODUCTION Arabic Literature, literature written in the Arabic language, from the 6th century to the present.

  The life of the Prophet Muhammad also generated its own literary sources, primary among which is the hadith. The hadiths were a collection of the Prophet's sayings and actions, transmitted through a chain of authorities said to go back to Muhammad himself. The two most famous collections of hadiths are those of al-Bukhari andMuslim in the 9th century. These works provide a wealth of information covering all aspects of a Muslim's life, from prayer to personal, social, and business conduct. The...

• Brain.

  The hypothalamus lies beneath the thalamus on the midline at the base of the brain. It regulates or is involved directly in the control of many of the body's vital drivesand activities, such as eating, drinking, temperature regulation, sleep, emotional behavior, and sexual activity. It also controls the function of internal body organs bymeans of the autonomic nervous system, interacts closely with the pituitary gland, and helps coordinate activities of the brain stem. D Brain Stem The brain st...

• Abolitionist Movement.

  The American Revolution (1775-1783) and the French Revolution (1789-1799), widely seen as revolutions by citizens against oppressive rulers, transformed thisEnlightenment assertion into a call for universal liberty and freedom. The successful slave revolt that began in the French colony of Saint-Domingue in 1791 was part of this revolutionary age. Led by François Dominique ToussaintLouverture, black rebels overthrew the colonial government, ended slavery in the colony, and in 1804 established th...

• Abolitionist Movement - U.

  The American Revolution (1775-1783) and the French Revolution (1789-1799), widely seen as revolutions by citizens against oppressive rulers, transformed thisEnlightenment assertion into a call for universal liberty and freedom. The successful slave revolt that began in the French colony of Saint-Domingue in 1791 was part of this revolutionary age. Led by François Dominique ToussaintLouverture, black rebels overthrew the colonial government, ended slavery in the colony, and in 1804 established th...

• Cat Family - biology.

  cats have coats that are mainly brown, yellow, or gray, often with white underbellies. The cubs of many species of cats have spotted coats, which helps hide them ingrass and underbrush from predators. Adult cats that have mainly spotted patterns in their fur include cheetahs, leopards, clouded leopards, jaguars, ocelots, margays, Geoffroy’s cat, and servals. Singlecolor coats are found in lions, pumas, and jaguarundis. Some individuals among leopards and jaguars, and more rarely in other species...

• Native American Policy.

  of white settlement dominated policy during the second quarter of the 19th century. IV REMOVAL PERIOD The idea of moving Native Americans to a different part of the country was not new. After the Louisiana Purchase in 1803, President Thomas Jefferson had suggestedthat tracts of land in this vast new territory could be given to native peoples if they agreed to cede their lands in the eastern part of the country. Transfers occurred in apiecemeal way, but no consistent removal program developed u...

• Algeria - country.

  areas to fishing. National parks, including the giant Tassili N’Ajjer National Park in the eastern corner of the country, comprise a large proportion of the protected area. The effects of Algeria’s human population on the fragile landscape have been severe. The greatest ecological threats are deforestation and burning of scrub vegetation,conversion of steppe habitat to arable land, and soil erosion due to overgrazing and poor farming practices. Pollution of Mediterranean coastal waters is pervas...

• Insect - biology.

  they almost always have six legs. In some insects, such as beetles, the legs are practically identical, but in other insects each pair is a slightly different shape. Still otherinsects have specialized leg structures. Examples are praying mantises, which have grasping and stabbing forelegs armed with lethal spines, and grasshoppers andfleas, which have large, muscular hind legs that catapult them into the air. Mole crickets’ front legs are modified for digging, and backswimmers have hind legs de...

• Marriage.

  In many traditional societies, marriage typically involved transfers of property from the parents to their marrying children or from one set of parents to the other. Thesecustoms persist in some places today and are part of the tradition of arranged marriages. For example, in some cultures the bride’s parents may give property (knownas a dowry) to the new couple. The practice of giving dowries has been common in countries such as Greece, Egypt, India, and China from ancient times until thepresen...

• 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...

• Chile - country.

  D Plant and Animal Life The indigenous plant life of Chile varies according to climatic zone. Plant life in the northern region includes brambles and cactus and has little variety. Here, theAtacama provides one of the best examples on Earth of an absolute desert. The more humid Central Valley supports several species of cacti, espino (a thorny shrub),grasses, and the Chilean pine, which bears edible nuts. Dense rain forests are located south of Valdivia with laurel, magnolia, false beech, and v...

• Franklin D.

  Roosevelt entrusted his campaign management to the journalist Louis McHenry Howe. Howe, a genius at politics, performed brilliantly. Henceforth, Roosevelt and Howewere to be almost inseparable, and Howe, a wizened and colorful little man, guided the political fortunes of the Hyde Park aristocrat. B Assistant Secretary of the Navy Even before his reelection to the New York legislature, Roosevelt had entered the national political arena by taking part in the campaign of Governor Woodrow Wilson of...

• Franklin D.

  Roosevelt entrusted his campaign management to the journalist Louis McHenry Howe. Howe, a genius at politics, performed brilliantly. Henceforth, Roosevelt and Howewere to be almost inseparable, and Howe, a wizened and colorful little man, guided the political fortunes of the Hyde Park aristocrat. B Assistant Secretary of the Navy Even before his reelection to the New York legislature, Roosevelt had entered the national political arena by taking part in the campaign of Governor Woodrow Wilson of...

• Chemistry - chemistry.

  parts of oxygen by weight, which is a ratio of about 1 to 8, regardless of whether the water came from the Mississippi River or the ice of Antarctica. In other words, acompound has a definite, invariable composition, always containing the same elements in the same proportions by weight; this is the law of definite proportions. Many elements combine in more than one ratio, giving different compounds. In addition to forming water, hydrogen and oxygen also form hydrogen peroxide.Hydrogen peroxide h...

• Iran - country.

  Zagros mountains. In the more arid central part of the country, wild pistachio and other drought-resistant trees grow in areas that have not been disturbed by humanactivity. Tamarisk and other salt-tolerant bushes grow along the margins of the Dasht-e Kavir. A wide variety of native mammals, reptiles, birds, and insects inhabit Iran. Many species of mammals—including wolves, foxes, bears, mountain goats, red mountainsheep, rabbits, and gerbils—continue to thrive. Others—including Caspian tigers,...

• MACHINE A EXPLORER LE TEMPS d Herbert-George Wells (résumé)

• LA SCIENCE-FICTION

  La science-fiction (1870). Grâce à l'invention de moyens de loco­ motion, ses héros partent à la découverte de mondes jusqu'alors inexplorés. Imaginer les voyages interplanétaires suppose de la part des auteurs une vision finie de la Terre, celle d'un ailleurs possible et une inventivité et une curiosité par rapport à la technologie. Jules Verne et H.G. Wells Verne est l'apôtre du progrès, aussi exact et pré­ cis que possible dans ses descrip...

• Herbert George WELLS: L'Ile du docteur Moreau (Résumé & Analyse)

• Herbert George WELLS: La Machine à explorer le temps (Résumé & Analyse)

• Exercise.

  broad, and most studies suggest a positive relationship between physical fitness and mental achievement. The relationship between regular aerobic exercise and cardiovascular health and longevity is well established. Regular exercise leads to a reduction in the risk ofcoronary heart disease, in which fatty deposits (plaque) form in blood vessels supplying the muscular wall of the heart, compromising oxygen delivery to the heartmuscle. In addition, with regular exercise the efficiency of the heart...

• Metropolitan Museum of Art.

  B Ancient Near Eastern Art The objects in this department range from a vast geographical area in southwest Asia and northeast Africa from around 5000 BC to around AD 600. Notable works include Assyrian reliefs from the palace of King Ashurnasirpal II at Calah (now Nimrud, Iraq), Sumerian sculpture, Anatolian ivories, Iranian bronzes, and Achaemenidand Sassanian works in silver and gold. C Arms and Armor This department is renowned for its collection of European armor from the Middle Ages (5t...

• African Theater I INTRODUCTION African Theater, traditional, historical, and contemporary dramatic forms in Africa south of the Sahara.

  The period after World War II ended in 1945 led to the struggle for and achievement of independence in many African countries. The new nation-states were oftenestablished along colonial boundaries and power was handed over to a bourgeois class who had been educated in Europe. The epoch-making era of nationalismproduced a number of African playwrights who merged African theatrical traditions with European forms. These plays are still widely performed and read in many partsof the continent. Nigeri...

• African Theater I INTRODUCTION African Theater, traditional, historical, and contemporary dramatic forms in Africa south of the Sahara.

  The period after World War II ended in 1945 led to the struggle for and achievement of independence in many African countries. The new nation-states were oftenestablished along colonial boundaries and power was handed over to a bourgeois class who had been educated in Europe. The epoch-making era of nationalismproduced a number of African playwrights who merged African theatrical traditions with European forms. These plays are still widely performed and read in many partsof the continent. Nigeri...

• William Howard Taft.

  considered him an ideal successor. Because Roosevelt himself was satisfied that Taft's election would ensure that his reform programs were continued, he used hisinfluence with each state's Republican Party to get Taft the nomination. As a result, Taft became the Republican candidate on the first ballot. He was elected president in1908 with a popular vote of 7,675,320 to 6,412,294 for Nebraska editor and Democratic candidate William Jennings Bryan, and an electoral vote of 321 to Bryan's 162.Alth...

• William Howard Taft

  considered him an ideal successor. Because Roosevelt himself was satisfied that Taft's election would ensure that his reform programs were continued, he used hisinfluence with each state's Republican Party to get Taft the nomination. As a result, Taft became the Republican candidate on the first ballot. He was elected president in1908 with a popular vote of 7,675,320 to 6,412,294 for Nebraska editor and Democratic candidate William Jennings Bryan, and an electoral vote of 321 to Bryan's 162.Alth...

• Fish - biology.

  pectoral fins provide fine movements, add forward thrust, or, together with the pelvic fins, serve as brakes. Typically, fins consist of a thin membrane stretched over afanlike series of thin rods called spines or rays. Most fish breathe underwater with the help of special respiratory organs called gills. Gills are made of a series of thin sheets or filaments through which blood circulates.As water moves into a fish’s mouth and passes over the gills, dissolved oxygen passes across the thin gill...