656 résultats pour "work"

• Thomas Edison - USA History.

  While Edison was working on the electric light, he made a scientific discovery that would become important to future generations. Edison noticed that particles of carbonfrom the filament blackened the insides of his light bulbs. This effect was caused by the emission of electrons from the filament, although Edison made the discoverybefore he and other scientists knew the electron existed. Not until 1897 did British physicist J. J. Thomson prove that the blackening observed by Edison was caused b...

• Burke, Edmund

  The description of his writings as philosophical is further called into question by their occasional, polemical and often party-political character. However, these early mature writings - and a surviving notebook - reveal a pervasive sceptical epistemological position which is entirely consistent with, and arguably underpins his later political theory. In A Vindication of Natural Society Burke satirized the confident rationalism which the First Viscount Bolingbroke, in his posthumously publis...

• Intelligence.

  education. Teachers had no way of knowing which of the “slow” students had true learning problems and which simply had behavioral problems or poor prior education.In 1904 the French Ministry of Public Instruction asked Binet and others to develop a method to objectively identify children who would have difficulty with formaleducation. Objectivity was important so that conclusions about a child’s potential for learning would not be influenced by any biases of the examiner. The governmenthoped tha...

• Astronaut - astronomy.

  Every operation during a flight is important and interesting, but many might be boring to an observer. Much of an astronaut’s job is entering computer instructions,preparing samples, making measurements, recording data, fixing what breaks, and adjusting the checklist when something unexpected happens. Sometimes astronautsretrieve or repair satellites, rendezvous or dock with other spacecraft, and do important emergency repairs. The adaptability of the human crew is crucial to the successof missi...

• Winston Churchill I INTRODUCTION Winston Churchill (1874-1965), British politician and prime minister of the United Kingdom (1940-1945, 1951-1955), widely regarded as the greatest British leader of the 20th century.

  sufficient tools to break the stalemate on the western front and he worked on developing armored fighting vehicles (tanks) to break the deadlock and end theslaughter. As the lines hardened on the western front, Churchill focused on a campaign to force open the Dardanelles Strait, controlled by the Ottoman Empire, to give the Allies adirect route to Russia through the Black Sea. Such a move would bring much-needed supplies to the Russian armies and eliminate the Ottomans from the war. Whenthe nav...

• Winston Churchill.

  sufficient tools to break the stalemate on the western front and he worked on developing armored fighting vehicles (tanks) to break the deadlock and end theslaughter. As the lines hardened on the western front, Churchill focused on a campaign to force open the Dardanelles Strait, controlled by the Ottoman Empire, to give the Allies adirect route to Russia through the Black Sea. Such a move would bring much-needed supplies to the Russian armies and eliminate the Ottomans from the war. Whenthe nav...

• Winston Churchill .

  sufficient tools to break the stalemate on the western front and he worked on developing armored fighting vehicles (tanks) to break the deadlock and end theslaughter. As the lines hardened on the western front, Churchill focused on a campaign to force open the Dardanelles Strait, controlled by the Ottoman Empire, to give the Allies adirect route to Russia through the Black Sea. Such a move would bring much-needed supplies to the Russian armies and eliminate the Ottomans from the war. Whenthe nav...

• 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...

• 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...

• Édouard Manet I INTRODUCTION Manet: Tradition and Innovation French impressionist painter Édouard Manet shocked art audiences in Paris with Le déjeuner sur l'herbe (The Luncheon on the Grass; 1863, Musée d'Orsay, Paris), which depicts a nude woman at a woodland picnic.

  Le Déjeuner sur l’herbeLe Déjeuner sur l’herbe (Luncheon on the Grass) by Édouard Manet was painted in 1863. When it was first displayed, therough brushwork and undefined areas of color were as distressing to the public as the nude woman who was neither aclassical goddess nor a symbol in an allegory. Manet claimed that the real subject of the painting was light, and it was thatphilosophy that gave birth to impressionism.Bridgeman Art Library, London/New York After his father died in 1862, Manet...

• 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.”...

• Cambodia - country.

  The population of Cambodia is 14,241,640 (2008 estimate). Population growth per year is estimated at 1.8 percent, one of the highest rates in Asia. The rate of infantmortality is also high. The population density is 81 persons per sq km (209 per sq mi), with the densest concentrations on the heavily cultivated central plain. Themountainous regions of the country, where malaria is widespread, are thinly populated, as are the poorly watered northern provinces. During the late 1970s, under thebruta...

• George Washington I INTRODUCTION George Washington (1732-1799), first president of the United States (1789-1797) and one of the most important leaders in United States history.

  A2 Promotion This was Washington’s first experience with the difficulties of raising troops while lacking equipment, clothing, and funds. Apparently he thought his efforts worthy ofsome recognition and successfully applied to Dinwiddie for a lieutenant colonel’s commission. He left Alexandria, Virginia, early in April with about 150 poorly equippedand half-trained troops. A3 First Battles Before he had advanced very far, Washington received news that the French had driven Trent’s men back from...

• George Washington.

  A2 Promotion This was Washington’s first experience with the difficulties of raising troops while lacking equipment, clothing, and funds. Apparently he thought his efforts worthy ofsome recognition and successfully applied to Dinwiddie for a lieutenant colonel’s commission. He left Alexandria, Virginia, early in April with about 150 poorly equippedand half-trained troops. A3 First Battles Before he had advanced very far, Washington received news that the French had driven Trent’s men back from...

• George Washington

  A2 Promotion This was Washington’s first experience with the difficulties of raising troops while lacking equipment, clothing, and funds. Apparently he thought his efforts worthy ofsome recognition and successfully applied to Dinwiddie for a lieutenant colonel’s commission. He left Alexandria, Virginia, early in April with about 150 poorly equippedand half-trained troops. A3 First Battles Before he had advanced very far, Washington received news that the French had driven Trent’s men back from...

• Guyana - country.

  European patterns of living. People of mixed African and European ancestry form a distinct group in Guyana, maintaining closer social ties to the European communitythan to the African Guyanese community. Asians from the Indian subcontinent began to arrive in the 19th century, following the abolition of slavery in Guyana, to work as indentured and contract laborers. Theycontinued to arrive until 1917, when Britain outlawed indentured servitude. Thousands of Indians chose to remain in Guyana after...

• Slovakia - country.

  The country is divided informally into the three regions of Western Slovakia, Central Slovakia, and Eastern Slovakia, corresponding to administrative divisions that wereabolished in 1989. Most of Slovakia’s 600,000 Hungarians live in the southern parts of Western and Central Slovakia, which served as the cultural center of Hungary forseveral centuries after Hungary proper was invaded by the Ottomans in the 16th century. The Ruthenian and Ukrainian minorities are concentrated in the northernregio...

• Philadelphia (city, Pennsylvania) - geography.

  national trend of migration from eastern cities to the warmer climate of the Sun Belt. Whereas in 1950 Philadelphia contained more than 2 million people and ranked as the third largest city in America, the city's population plunged to 1,517,550 by 2000.In 2006, the city's population was estimated at 1,448,394. While the city proper was decreasing in population, the metropolitan area centered on Philadelphia grew. In 2006 the region had 6.2 million inhabitants. Philadelphiaranked as the nation’s...

• Bacon, Roger

  contemporaries (such as Albert the Great and Thomas Aquinas ) who were taking a more traditional approach to philosophical study. By the early 1260s Bacon had become unpopular among the Franciscans, and was apparently sent to their convent in Paris under an injunction to neither lecture nor circulate his writings outside the Order without approval. Undaunted, Bacon set about communicating his controversial views to Cardinal Guy le Gos de Foulques. The latter, upon becoming Pope Clement IV in...

• Agatha Christie

  b. Miss Jane Marple : Miss Jane Marple, another famous character of the work of Agatha Christie appeared in 1930 in the novel The Murder at the Vicarage "and continue his career until 1979, having starred in a dozen novels inwhich it solves the murders of the most interesting as those "train from 16h50" or "At Bertram's Hotel". It is already old when it was discovered in the first book but that did not stop carrying out its various investigations. She leads a quiet life of single hardened in...

• Albert Einstein I INTRODUCTION Albert Einstein (1879-1955), German-born American physicist and Nobel laureate, best known as the creator of the special and general theories of relativity and for his bold hypothesis concerning the particle nature of light.

  On the basis of the general theory of relativity, Einstein accounted for the previously unexplained variations in the orbital motion of the planets and predicted thebending of starlight in the vicinity of a massive body such as the sun. The confirmation of this latter phenomenon during an eclipse of the sun in 1919 became a mediaevent, and Einstein’s fame spread worldwide. For the rest of his life Einstein devoted considerable time to generalizing his theory even more. His last effort, the unifi...

• Albert Einstein.

  On the basis of the general theory of relativity, Einstein accounted for the previously unexplained variations in the orbital motion of the planets and predicted thebending of starlight in the vicinity of a massive body such as the sun. The confirmation of this latter phenomenon during an eclipse of the sun in 1919 became a mediaevent, and Einstein’s fame spread worldwide. For the rest of his life Einstein devoted considerable time to generalizing his theory even more. His last effort, the unifi...

• Depression (psychology).

  IV CAUSES Some depressions seem to come out of the blue, even when things are going well. Others seem to have an obvious cause: a marital conflict, financial difficulty, or somepersonal failure. Yet many people with these problems do not become deeply depressed. Most psychologists believe depression results from an interaction betweenstressful life events and a person’s biological and psychological vulnerabilities. A Biological Factors Depression runs in families. By studying twins, researche...

• Plato I INTRODUCTION Plato (428?

  one of the individuals escapes from the cave into the light of day. With the aid of the sun, that person sees for the first time the real world and returns to the cave withthe message that the only things they have seen heretofore are shadows and appearances and that the real world awaits them if they are willing to struggle free oftheir bonds. The shadowy environment of the cave symbolizes for Plato the physical world of appearances. Escape into the sun-filled setting outside the cave symbolize...

• Plato.

  one of the individuals escapes from the cave into the light of day. With the aid of the sun, that person sees for the first time the real world and returns to the cave withthe message that the only things they have seen heretofore are shadows and appearances and that the real world awaits them if they are willing to struggle free oftheir bonds. The shadowy environment of the cave symbolizes for Plato the physical world of appearances. Escape into the sun-filled setting outside the cave symbolize...

• "A Modest Proposal" - anthology.

  I SHALL now therefore humbly propose my own Thoughts; which I hope will not be liable to the least Objection. I HAVE been assured by a very knowing American of my Acquaintance in London; that a young healthy Child, well nursed, is, at a Year old, a most delicious, nourishing, and wholesome Food; whether Stewed, Roasted, Baked, or Boiled; and, I make no doubt, that it will equally serve in a Fricasie, or Ragoust. I DO therefore humbly offer it to publick Consideration, that of...

• Encyclopedia of Philosophy: AQUINAS' LIFE AND WORKS

• Athens (Greece) - geography.

  At the heart of the modern city is Syntagma (Constitution) Square, located east of the Acropolis. The square is bordered by the national Parliament Building, originally aroyal palace completed in 1842 for King Otto I. Nearby is the Tomb of the Unknown Soldier, which features a daily changing of the guard. Several of the city’s principalhotels as well the offices of major banks and airline companies also face the square. Behind the Parliament Building is the National Gardens, a public park that i...

• 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...

• Ants. Maybe you help with chores at home. Maybe you play

  After the queen mates with a male ant, she makes or finds a nest. She then lays eggs. The first group ofeggs to hatch become worker ants. The queen’s only job after that is to lay more eggs. The worker antstake over the job of caring for the nest. Males come from some of the eggs, queens and more workerscome from other eggs. When the egg hatches, a wormlike larva appears. It does nothing but eat and grow. When it gets bigenough, it becomes a pupa. The pupa grows legs and antennae. It becomes an...

• Anselm of Canterbury

  twenty-six years old. After his father's death (presumably in 1060), Anselm chose to enter the monastic order atBec rather than return to the family estate. In 1063 he was elected prior of Bec, succeeding Lanfranc, who hadbeen called to the abbey of St.-Etienne in Caen; in 1078 he was chosen abbot, in spite of his disinclination toassume the office. He showed even more reluctance and protestation when selected as archbishop of Canterbury in1093, again in succession to Lanfranc. Eadmer tells...

• Tragedy I INTRODUCTION Euripides Unlike other 5th-century BC Greek playwrights, tragic poet Euripides addressed the plight of the common people, rather than that of mythic heroes.

  SenecaSeneca was a Roman philosopher, dramatist, and statesman. His tragedies later influenced Renaissance dramatists,including William Shakespeare. The bust of Seneca shown here is a Roman copy of a Greek original.Art Resource, NY Aeschylus is one of the best known of the ancient Greek tragic playwrights. The author of some 90 plays, he established many of the conventions of the tragic dramaticform, which he perfected throughout his career. Aeschylus's skillful use of poetic language and brilli...

• Westerns I INTRODUCTION Gene Autry Known as the Singing Cowboy, Gene Autry was the star of nearly 100 Westerns during his career as an actor.

  James Fenimore CooperNineteenth-century American writer James Fenimore Cooper, famed for his adventure novels of American frontier life, wasalso an ardent social critic. Cooper wrote a series of five novels, known collectively as the Leather-Stocking Tales, in whichhe detailed the adventures of a fictional frontiersman named Natty Bumppo. In Bumppo, Cooper portrayed a man ofnature and a friend of the Native Americans. In addition to fiction, Cooper wrote several nonfiction works criticizingAmeri...

• Ethiopia - country.

  constitute about 6 percent of the population. The Somali, who live in the east and southeast, notably in the Ogadēn region, are about equal in number to the Shangalla.The Denakil inhabit the semidesert plains east of the highlands. The nonindigenous population includes Yemenis, Indians, Armenians, and Greeks. B Political Divisions Ethiopia is divided into nine regions composed of specific ethnic groups. The regions, which have a significant degree of autonomy, are Tigray; Afar; Amhara; Oromia;S...

• Ghana - country.

  times of depressed cacao prices, Ghana has significantly increased exports of timber to generate needed revenue. In 1988 Ghana initiated a conservation plan called the Forest Resource Management Project. In 1989 Ghana restricted the export of 18 tree species, and in 1994 thecountry banned the export of raw logs. About 4.8 percent (1997) of the country’s land is officially protected, but illegal logging threatens Ghana’s remaining forests. Deforestation, overgrazing, and periodic drought have led...

• 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...

• Hungary - country.

  Northern Hungary lacks sufficient water, especially between July and October, when precipitation levels are typically low. Canals irrigate the Great Hungarian Plain,which is subject to drought. Because of the country’s mainly flat terrain, only limited water resources can be harnessed for hydroelectric power. F Environmental Issues Rapid industrialization in Hungary following World War II contributed significantly to a number of major environmental problems, including air, water, and soil pollu...

• 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...

• Bachelard, Gaston (en anglais)

  understanding not only his own work, but also that of Althusser and the followers of Lacan . In France, Bachelard has been criticized by postmodernists for remaining faithful to some of the methods of critical philosophy, and by Marxists for his humanism. His works on poetics inspired many of the French New Critics (see French philosophy of science §§1-2 ). 2 The new scientific spirit To have taught science in the early part of the twentieth century is to have experienced dramatic ch...

• Encyclopedia of Philosophy: Abravanel, Judah ben Isaac ?

  prompting the received opinion that Leone meant to compose a concluding fourth dialogue. This inference isunwarranted. The twenty years between the completion of Dialoghi d'amore and Leone's death suggests that he had ample time to complete the work had he considered it either possible or necessary. Rather, the lack of anexplicit resolution mirrors the structure of the Platonic dialogues, especially the Symposium , the model for all Renaissance writings on love. 3 Philosophical significance...

• Lamia

  reason would tell him that it is not safe enough to depend only on a career as a poet. He saw in himself the ability and didn't let count anything else what could speak against the life of poet. This alike attitude is seen in Lycius when he listens to Lamia not to invite Appolonius to the marriage, even though he had learned everything by Appolonius, had always listen to his advices and obeyed his words. It is as if Keats saw himself turning away from his reason, shutting it out from his dream-l...

• Rice - biology.

  V HISTORY According to the most widely accepted theory, rice cultivation originated as early as 10,000 BC in Asia. Archaeological evidence shows that rice was grown in Thailand as early as 4000 BC, and over the centuries spread to China, Japan, and Indonesia. By 400 BC rice was cultivated in the Middle East and Africa. The invading armies of Alexander the Great probably introduced rice to Greece and nearby Mediterranean countries around 330 BC. Rice was brought to the American colonies in t...

• Captain James Cook.

  After leaving Tahiti, the expedition headed north into uncharted territory. After becoming the first Europeans to sight the Hawaiian Islands (which Cook named theSandwich Islands) in 1778, they sailed along the west coast of Canada and Alaska. Twice Cook explored inlets that offered some promise of a Northwest Passage, but tono avail. After sailing through the Bering Strait into the Arctic Sea and briefly scouting the Asian side of the strait, Cook decided to winter in the Hawaiian Islands. Hein...

• Captain James Cook - explorer.

  After leaving Tahiti, the expedition headed north into uncharted territory. After becoming the first Europeans to sight the Hawaiian Islands (which Cook named theSandwich Islands) in 1778, they sailed along the west coast of Canada and Alaska. Twice Cook explored inlets that offered some promise of a Northwest Passage, but tono avail. After sailing through the Bering Strait into the Arctic Sea and briefly scouting the Asian side of the strait, Cook decided to winter in the Hawaiian Islands. Hein...

• W. E. B. Du Bois - USA History.

  VI PEACE ACTIVIST After World War II (1939-1945), Du Bois became increasingly involved in promoting world peace and nuclear disarmament. In 1950 he became chairman of the PeaceInformation Center in New York City, a group whose stated objective was to gather signatures in the United States for a global petition to ban the use of nuclearweapons. In July of that year, after the organization had gathered more than one million U.S. signatures, the Peace Center was labeled a Communist-front organiza...

• Political Parties.

  In both Britain and the United States, competition between political parties undermined traditional conceptions of politics rooted in classical and Christian notions ofvirtue and public service. According to this tradition, political leaders should act according to a model of virtue that involved placing the common good above theinterests of a fraction of the society. Leaders acting to benefit only themselves or a narrow portion of the society were considered corrupt. However, party competitionr...

• Police.

  body. In larger agencies, executive officers may be selected through a civil service or merit system, after moving through the ranks from patrol officer to sergeant,lieutenant, captain, and (in still larger agencies) deputy or assistant chief. At the county level, the head of the agency usually holds the title sheriff. The sheriff is almost always elected and has the power to appoint deputies. Sheriffs'departments often provide law enforcement services for unincorporated areas of counties and ar...

• Jamaica - country.

  majority, the Church of God, Baptists, Anglicans, Seventh-day Adventists, Pentecostalists, and Roman Catholics predominate. Several well-established Jewish, Muslim,and Hindu communities exist. A number of popular sects, such as Pocomania and Rastafarianism, are a significant and famous feature of the national religious life. C Education School attendance by children between the ages of 6 and 11 is nearly universal, and 84 percent of all 12- to 18-year-olds attend secondary institutions. In 2000...

• Cognitive Psychology.

  full richness of people’s cognitive experiences. Describing the act of remembering as a process of storage and retrieval, for example, neglects the subjective experienceof remembering. Another criticism is that information-processing theory may not reflect how the brain actually works. Newer models, such as the parallel distributedprocessing model, try to address this criticism by drawing on studies of brain structure and function. Psychologists continue to debate the adequacy of the information...

• Pittsburgh - geography.

  College of Allegheny County (1966), with branches in the city and suburbs. Pittsburgh has many outstanding cultural institutions. The Oakland district is where Carnegie Mellon University and the University of Pittsburgh are located. The CarnegieMuseums of Pittsburgh include The Carnegie Museum of Art (including the Scaife Galleries), which holds a distinguished motion-picture and video collection and a uniquestudy of architecture; the Carnegie Museum of Natural History, which displays an extensi...