661 résultats pour "use"

• Games.

  For most of human history, a game could not gain much popularity unless it was fairly easy for players to make their own equipment. The invention of printing (whichoccurred in the mid-1400s in the West) made this process easier, but it was not until the advances of the 18th-century Industrial Revolution that it became possible tomass-produce many new varieties of games. Twentieth-century technological advances such as the invention of plastic and the computer revolution led to the creationof mor...

• instruction c_51

• Kuiper Belt - astronomy.

  III RESEARCH The Kuiper Belt is an exciting area of research in astronomy. The discovery and astronomical exploration of the Kuiper Belt over the past decade have fueled arevolution in scientists’ views of the solar system. Today astronomers recognize the Kuiper Belt as the third major region of the solar system (the other two regions arethe inner solar system, with its small rocky planets, and the outer solar system, with its gas-giant planets). They believe that the belt helps explain Pluto’...

• Mental Illness.

  note that under this definition, political dissidents could be considered mentally ill for refusing to accept the dictates of their government. VI PREVALENCE Mental illness affects people of all ages, races, cultures, and socioeconomic classes. The prevalence of mental illness refers to how many people experience a mentalillness during a specified time period. A United States and Worldwide In the United States, researchers estimate that about 24 percent of people 18 or older, or about 44 mill...

• Le mot "liberté" dans l'oeuvre de DESCARTES

  et avec liberté à détruire généralement toutes mes anciennes opinions. et tout de même qu'un esclave qui jouissait dans le sommeil d'une liberté imaginaire, lorsqu'il commence à soupçonner que saliberté n'est qu'un songe, craint de se réveiller, et conspire avec ces illusions agréables pour en être plus longtemps abusé, ainsi jeretombe insensiblement de moi-même dans mes anciennes opinions, et j'appréhende de me réveiller de cet assoupissement, depeur que les veilles laborieuses qui auraient à s...

• Baseball.

  pitcher or argue a call with an umpire. Two or more coaches, positioned closer to the field, assist the manager by communicating with the players. For example,managers may decide what pitches should be thrown, when batters should swing at a pitch, and how runners should move around the bases. The manager relays thesedecisions through special hand signals that the coaches repeat to communicate to the players. Umpires are responsible for interpreting and enforcing the rules of play. They rule on...

• Seals.

  noises to find mates and scare away rivals. Some types of seals sing songs that last more than a minute. ARE SEALS ENDANGERED? Large sharks and killer whales hunt and eat seals. Polar bears kill seals on land and on ice in the Arctic.But people are the biggest threat to seals. People have hunted seals for food, skins, and blubber. The northern elephant seal has nearly died out. Hawaiian and Mediterranean monk seals are alsoendangered, and a third type of monk seal is already extinct. Many countr...

• Biblical Archaeology.

  religion, among them the storm deity Baal (title of Hadad) mentioned frequently in the Old Testament. Moreover, the poetry of Ugarit has strong affinities with that ofthe Bible. They share much in the way of vocabulary, structure, and the use of figures of speech and other literary devices. In 1945, at ancient Naj‘Ḩamm ād ī in Upper Egypt, some 50 Gnostic writings in Coptic were discovered. They could be dated to the 4th century AD, but investigation of their character and content showed that t...

• Peter Ilyich Tchaikovsky I INTRODUCTION Peter Ilyich Tchaikovsky Peter Ilyich Tchaikovsky's work combined Russian and European influences.

  The period of his connection with von Meck was one of rich productivity for Tchaikovsky. To this time belong the operas Eugene Onegin (1879), The Maid of Orleans (1881), Mazeppa (1884), and The Sorceress (1887); the ballets Swan Lake (1877) and The Sleeping Beauty (1890); the Violin Concerto in D Major (1878) and the Piano Concerto No. 2 in G Major (1881); the orchestral works Marche Slave (1876), Symphony No. 4 in F Minor (1878), Capriccio Italien (1880), Serenade (1881), the 1...

• Word & Image A Journal of Verbal/Visual Enquiry ISSN: 0266-6286 (Print) 1943-2178 (Online) Journal homepage: https://www.

  Reception and interference: reading Jean Molinet's rebus-poems ADRIAN ARMSTRONG Northern French culture in the late Middle Ages is marked not only by a proliferation of visual images, but also by the knowledge which these images convey, velY often in the form of figurative discourse. Traditional coded or symbolic visual fornls include heraldly, where tinctures and charges often accumulate particular connotations, and typological staine...

• Plante First Goalie to Wear a Mask.

  rubber shock, which one player described as “the first cousin to shell shock.” Those with advanced cases have been known to skate off the ice during the middle ofchampionship games. Perhaps as a test of Plante's emotional state, Blake requested that he not wear the mask during the regular season. Plante complied, although hedonned the mask for pregame practice sessions. Early in the season, on November 1, the Canadiens took a seven-game unbeaten streak into a match against the New York Range...

• Common-sense ethics

  mind, common to all human beings. Reid thought this showed that God meant it to guide our wills. It is both an intellectual and active power. As an intellectual power, it enables us to intuit directly the first principles of morality. Reid thought that moral reasoning, and indeed all reasoning, must start from self-evident first principles which we perceive immediately. If we had to figure out the basic principles of morality by a process of ratiocination, as Locke maintained, morality would not...

• Medical Ethics.

  medical profession. In recent years, however, the field of medical ethics has struggled to keep pace with the many complex issues raised by new technologies for creating and sustaininglife. Artificial-respiration devices, kidney dialysis, and other machines can keep patients alive who previously would have succumbed to their illnesses or injuries.Advances in organ transplantation have brought new hope to those afflicted with diseased organs. New techniques have enabled prospective parents to con...

• Elementary Particles I INTRODUCTION Structure of Matter Modern physics has revealed successively deeper layers of structure in ordinary matter.

  The most fundamental particles that make up matter fall into the fermion category. These fermions cannot be split into anything smaller. The particles that carry theforces acting on matter and antimatter are bosons called force carriers. Force carriers are also fundamental particles, so they cannot be split into anything smaller.These bosons carry the four basic forces in the universe: the electromagnetic, the gravitational, the strong (force that holds the nuclei of atoms together), and the wea...

• Samuel de Champlain.

  From 1616 to 1620 Champlain spent most of each year in France, with brief summer visits to Québec. In France he had to struggle to keep the Canadian enterprisealive, raise capital, and enlist workers. He also had to fight to keep his command over Québec. In 1618 he presented reports on the future of the French colonies inAmerica to the king and to the French Chamber of Commerce. In these reports he proposed that 300 settler families and 15 Récollets be established at Québec, with 300 soldiers to...

• Samuel de Champlain - explorer.

  From 1616 to 1620 Champlain spent most of each year in France, with brief summer visits to Québec. In France he had to struggle to keep the Canadian enterprisealive, raise capital, and enlist workers. He also had to fight to keep his command over Québec. In 1618 he presented reports on the future of the French colonies inAmerica to the king and to the French Chamber of Commerce. In these reports he proposed that 300 settler families and 15 Récollets be established at Québec, with 300 soldiers to...

• Vincent van Gogh I INTRODUCTION Church at Auvers by Van Gogh Dutch artist Vincent van Gogh spent the last months of his life in Auvers-sur-Oise, near Paris, under the care of Dr.

  III PARIS Van Gogh's Self-PortraitThe burning eyes of this Self-Portrait are an example of how 19th-century Dutch painter Vincent van Gogh attempted tocapture the human essence and emotions of his subjects. During the last several years of his life, van Gogh created anumber of self-portraits. The expressive brushstrokes and vibrant colors in these paintings are typical of this later style.Bridgeman/Art Resource, NY In 1886 van Gogh went to live with Théo in Paris, where he became familiar with...

• Métis - Canadian History.

  authority in the Northwest Rebellion. As in 1869, they were worried about title to their river lots, which were unsurveyed and were therefore omitted from the surveyadopted by the Department of the Interior. The Métis demanded a distribution of land and scrip, as had occurred in Manitoba after 1870. The Métis action at Batoche encouraged several bands of indigenous nations (Cree, Assiniboine, and Sioux) to take up arms. Threatened with a general rising across theNorthwest Territories, the Canadi...

• Titian I INTRODUCTION Titian (1477?

  Pesaro (1519-26), Titian effected a crucial change in Renaissance sacre conversazioni (paintings of the Virgin enthroned among saints) by placing the Virgin, traditionally at the composition's center, halfway up its right side, and by painting behind her in diagonal recession two giant columns that soar out of the picture'sspace. This new scheme was widely adopted by later artists, such as Paolo Veronese and the Carracci family, and, with its evocation of movement and infinity, it openedthe w...

• NASA - astronomy.

  Challenger shuttle after launch in 1986 and the Columbia shuttle during reentry in 2003, killing both crews. Investigations traced the accidents to design flaws and tomanagement problems. Both accidents led to design and procedure changes, and to a temporary stoppage of shuttle flights. Following the Columbia disaster, NASA alsoannounced plans to retire the shuttle in 2010, after completion of the International Space Station (ISS), a human orbital research facility. The Constellation program is...

• Alphabet I INTRODUCTION Bengali Script India developed a number of different writing systems over the course of its history.

  A Pictographic and Ideographic Systems Early systems of writing used pictures to represent things and then to represent the sounds of those things. Pictographic writing, in which a simplified picture of the sunstood for the word sun, was probably the first step toward a written language. Chinese began as a pictographic language. To represent abstract ideas, the Chinese writing system combined pictographs. For example, the pictographs for sun and tree were combined to represent the concept of...

• Rembrandt.

  myth that the painting was rejected by those who commissioned it, and led to a decline in Rembrandt's reputation and fortune, it was actually well received. Many of Rembrandt's landscapes in this middle period are romantic and based on his imagination rather than recording specific places. The inclusion of ancient ruins androlling hills, not a part of the flat Dutch countryside, as in River Valley with Ruins (Staatliche Gemäldegalerie, Kassel), suggests a classical influence derived from Italy...

• Cobra (snake) - biology.

  Most cobras prey on small rodents or other small mammals. They also eat birds, snakes, lizards, frogs, toads, insects, and even eggs. Water cobras catch fish and kingcobras specialize in eating other snakes. Similar to other venomous snakes, cobras use venom to subdue their prey before swallowing it whole, generally head first. Thevenom may contain substances that also break down the prey for digestion. Despite their potent venom and dramatic threat displays, cobras are hunted and eaten by a num...

• Quark I INTRODUCTION Quark, smallest known building block of matter.

  Constituents of MatterMatter is composed of tiny particles called quarks. Quarks come in six varieties: up (u), down (d), charm (c), strange (s),top (t), and bottom (b). Quarks also have antimatter counterparts called antiquarks (designated by a line over the lettersymbol). Quarks combine to form larger particles called baryons, and quarks and antiquarks combine to form mesons.Protons and neutrons, particles that form the nuclei of atoms, are examples of baryons. Positive and negative kaons aree...

• Excerpt from Titus Andronicus - anthology.

  For that they will not intercept my tale.When I do weep they humbly at my feetReceive my tears and seem to weep with me,And were they but attirèd in grave weedsRome could afford no tribunes like to these.A stone is soft as wax, tribunes more hard than stones.A stone is silent and offendeth not,And tribunes with their tongues doom men to death.But wherefore stand'st thou with thy weapon drawn? LUCIUS. To rescue my two brothers from their death,For which attempt the Judges have pronouncedMy everla...

• Chad - country.

  B Industries The processing of cotton and cottonseed oil and the manufacturing of peanut oil are major industries in Chad. Modern meatpacking plants have been established inN’Djamena and Sarh. The fishing industry furnishes fresh, dried, and smoked fish for domestic use and export. Petroleum mining and processing are increasinglyimportant industries in Chad. Gold and natron, a mineral used to make soap, glass, paper, and medicines, are also mined. Forestry is important in the south. The outputo...

• Shanghai - geography.

  language. V EDUCATION AND CULTURE Shanghai is one of China’s leading centers of learning and culture. The metropolitan area is home to more than 40 institutions of higher learning. These include some ofChina’s most famous universities, such as Fudan University (founded in 1905), Tongji University (1907), and the East China Normal University (1951). A large branch ofthe Chinese Academy of Sciences is located in Shanghai, and extensive research is undertaken in areas such as semiconductors, laser...

• érosion.

  En même temps que le lit s'approfondit, il s'élargit parfois. Les berges inscrites dans des matériaux meubles s'éboulent quand elles sont imbibées d'eau, lors des crues ; lescourants les frappent, en particulier dans les courbes, les faisant reculer tandis que les sinuosités s'exagèrent. Ainsi se forment et évoluent les méandres. Cet élargissementdu lit relève de l'érosion latérale. L'eau opère un tri en fonction de sa compétence, ou capacité de transport (taille maximale des alluvions que le co...

• érosion - géologie et géophysique.

  En même temps que le lit s'approfondit, il s'élargit parfois. Les berges inscrites dans des matériaux meubles s'éboulent quand elles sont imbibées d'eau, lors des crues ; lescourants les frappent, en particulier dans les courbes, les faisant reculer tandis que les sinuosités s'exagèrent. Ainsi se forment et évoluent les méandres. Cet élargissementdu lit relève de l'érosion latérale. L'eau opère un tri en fonction de sa compétence, ou capacité de transport (taille maximale des alluvions que le co...

• Sleep - biology.

  V FUNCTIONS OF SLEEP Although no one knows for sure why we sleep, there are a number of theories. Sleep may have evolved to protect animals from their predators by reducing theiractivity during the times when they are most vulnerable. Research has shown that REM and NREM sleep may serve specific biological functions. Sleep deprivation studies reveal that humans and other animals respond to sleeploss in the same way. When study subjects are deprived of REM sleep, they tend to spend longer period...

• Wetland.

  Other plants and animals have special adaptations suited for living in a wet environment. Most emergent plants have air spaces in their stems that enable oxygen to betransported to roots that grow in sediments with no oxygen. Some of the trees that grow in swamps form a set of roots above the soil surface or above the water thatallows them to get oxygen to the lower roots. In saltwater wetlands, specialized cells can limit the amount of salt that enters a plant, or specialized organs can excrete...

• Light I INTRODUCTION Light, form of energy visible to the human eye that is radiated by moving charged particles.

  simulates the action of a moving charge upon the electric field. It creates a wave that travels along the rope in a direction that is perpendicular to the initial up anddown movement. Because electromagnetic waves are transverse—that is, the vibration that creates them is perpendicular to the direction in which they travel, they are similar to waveson a rope or waves traveling on the surface of water. Unlike these waves, however, which require a rope or water, light does not need a medium, or su...

• John Tyler.

  A “His Accidency” Tyler was summoned to Washington, D.C., as acting president. The Constitution seemed unclear as to whether Tyler should now merely assume the duties of thepresident until new elections were held, or whether he should in fact assume the office of president. Tyler chose the latter view and on April 6 had himself sworn in aspresident. This procedure, later taken for granted, exposed Tyler to much censure and abuse. Throughout his term, Whigs and Democrats alike denounced his acti...

• John Tyler

  A “His Accidency” Tyler was summoned to Washington, D.C., as acting president. The Constitution seemed unclear as to whether Tyler should now merely assume the duties of thepresident until new elections were held, or whether he should in fact assume the office of president. Tyler chose the latter view and on April 6 had himself sworn in aspresident. This procedure, later taken for granted, exposed Tyler to much censure and abuse. Throughout his term, Whigs and Democrats alike denounced his acti...

• Ancient Egypt - history.

  The Nile River runs through the ancient city of Thebes in eastern Egypt. For a time, beginning in 2040 bc, Thebes was the capital ofEgypt.Farrell Grehan/Photo Researchers, Inc. According to inscriptions and documents found by archaeologists, the Egyptians called their country Kemet, meaning “the Black Land,” a reference to the dark, fertile soil that remained after the Nile floodwaters had receded. They also used another term, Deshret, or “the Red Land,” a designation for the desert sands th...

• William Henry Harrison.

  in September 1813, Harrison recaptured the city of Detroit, which the British had taken in 1812. The following month he overtook the British and Tecumseh's forces onthe Thames River in Canada. He captured the entire British force. Tecumseh was killed, and his forces were routed. Harrison's triumph on the Thames, although won over inferior forces badly placed, was vitally important because the victory secured the Northwest from the threat of aBritish invasion from Canada. It also added considerab...

• William Henry Harrison

  in September 1813, Harrison recaptured the city of Detroit, which the British had taken in 1812. The following month he overtook the British and Tecumseh's forces onthe Thames River in Canada. He captured the entire British force. Tecumseh was killed, and his forces were routed. Harrison's triumph on the Thames, although won over inferior forces badly placed, was vitally important because the victory secured the Northwest from the threat of aBritish invasion from Canada. It also added considerab...

• Organic Chemistry - chemistry.

  B Alkenes and Alkynes Isomeric with the cyclanes, or cycloalkanes as they are sometimes called, is the family of alkenes, also represented by the general formula C nH2n. This family of hydrocarbons is characterized by one or more double bonds between carbon atoms. Propene and cyclopropane, for example, are isomers, as are 1,3-dimethylcyclohexane and 3,4-dimethyl-2-hexene. (The location of the double bond is indicated by the 2-hexene part of the name.) Double bonds may also occur incyclic compou...

• Lesotho - country.

  V GOVERNMENT Under the terms of the constitution of 1965, which was suspended in 1970, Lesotho was a constitutional monarchy with a bicameral legislature. After a coup in 1986,legislative and executive powers were vested in the king but actually exercised by a 6-member military council and a 20-member council of ministers. In 1993 Lesothoadopted a new constitution that redefined the role of the monarchy and altered the legislative branch of the government. The king, who is head of state, has no...

• 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...

• Sexually Transmitted Infections.

  D Genital Herpes Genital herpes is caused by infection with the herpes simplex virus (HSV). Most cases of genital herpes are due to HSV type 2. Some cases, however, result from genitalinfections with HSV type 1, a common cause of cold sores. Genital herpes causes recurrent outbreaks of painful sores on the genitals, although the disease oftenremains dormant with no symptoms for long periods. In the United States, one in five individuals over the age of 12 is infected with HSV type 2, and the va...

• Native Americans of Middle and South America.

  A line that snakes across central Mexico near the Tropic of Cancer forms the northern boundary of Mesoamerica; north of this line rainfall sharply declines and theclimate is much drier. The ancient civilizations of Mesoamerica all arose and developed in the area between this line and the Guatemalan highlands far to the south. Richvolcanic soils are found throughout much of the region. A2 People and Languages Mesoamerica was a great melting pot, home to many peoples and interrelated cultures. In...

• Airplane.

  For example, the Anglo-French Concorde, a commercial supersonic aircraft, was generally limited to over-water routes, or to those over sparsely populated regions ofthe world. This limitation impacted the commercial viability of the Concorde, which ended its regular passenger service in October 2003. Designers today believe theycan help lessen the impact of sonic booms created by supersonic airliners but probably cannot eliminate them. One of the most difficult practical barriers to supersonic fl...

• Bible.

  collection of many different books. The Old Testament is by no means a unified book in terms of authorship, date of composition, or literary type; it is instead a veritablelibrary. Generally speaking, the books of the Old Testament and their component parts may be identified as narratives, poetic works, prophetic works, law, or apocalypses.Most of these are broad categories that include various distinct types or genres of literature and oral tradition. None of these categories is limited to the...

• Native American Literature I INTRODUCTION Leslie Marmon Silko Native American writer Leslie Marmon Silko is perhaps best known for her first novel, Ceremony (1977), a coming-of-age story about a young man of mixed Native American and white ancestry.

  SequoyahNative Americans did not use a complex written language before the immigration of Europeans to the Americas. In theearly 1820s the Cherokee leader Sequoyah developed an alphabet and written language for his native tongue. ManyCherokee learned the new written language readily, and in 1828 they published the first Native American newspaper,written in both Cherokee and English.THE BETTMANN ARCHIVE Before Native Americans came into contact with Europeans, many tribes supplemented the spoken...

• Eye. I INTRODUCTION Eye, light-sensitive organ of vision in animals. The eyes of

  Several structures, not parts of the eyeball, contribute to the protection of the eye. The most important of these are the eyelids, two folds of skin and tissue, upper andlower, that can be closed by means of muscles to form a protective covering over the eyeball against excessive light and mechanical injury. The eyelashes, a fringe ofshort hairs growing on the edge of either eyelid, act as a screen to keep dust particles and insects out of the eyes when the eyelids are partly closed. Inside the...

• Hundred Years' War.

  knowledge of English tactics. Du Guesclin became Constable of France (head of the army) in 1370, and when he died in 1380, Clisson succeeded him. Charles also reorganized the French military, developing a full-time, professional army for the first time, and established a regular system of taxation to pay for it. Inaddition, France gained an important ally on the throne of the Spanish kingdom of Castile, Henry II, who had pledged support for Charles V. When the Caroline war began in 1369, the Eng...

• Hundred Years' War .

  knowledge of English tactics. Du Guesclin became Constable of France (head of the army) in 1370, and when he died in 1380, Clisson succeeded him. Charles also reorganized the French military, developing a full-time, professional army for the first time, and established a regular system of taxation to pay for it. Inaddition, France gained an important ally on the throne of the Spanish kingdom of Castile, Henry II, who had pledged support for Charles V. When the Caroline war began in 1369, the Eng...

• Immune System.

  The humoral immune response involves a complex series of events after antigens enter the body. First, macrophages take up some of the antigen and attach it to classII MHC molecules, which then present the antigen to T helper cells. The T helper cells bind the presented antigen, which stimulates the T helper cells to divide andsecrete stimulatory molecules called interleukins. The interleukins in turn activate any B lymphocytes that have also bound the antigen. The activated B cells then divide...

• Excerpt from Martin Chuzzlewit - anthology.

  But there is one other piece of evidence, bearing immediate reference to their close connextion with this memorable event in English History, which must carryconviction, even to a mind (if such a mind there be) remaining unconvinced by these presumptive proofs. There was, within a few years, in the possession of a highly respectable and in every way credible and unimpeachable member of the Chuzzlewit Family (for hisbitterest enemy never dared to hint at his being otherwise than a wealthy man...