241 résultats pour "lights"

• Diego Velázquez (artist) I INTRODUCTION Velázquez and Baroque Theatricality Spanish painter Diego Velázquez presents two scenes in The Fable of Arachne (about 1656, Museo del Prado, Madrid, Spain), also known as The Spinners.

  search for a position as court painter. In 1623, however, he returned to the capital and, after executing a portrait (1623, Prado) of the king, was named official painterto Philip IV. The portrait was the first among many such sober, direct renditions of the king, the royal family, and members of the court. Indeed, throughout the later1620s, most of Velázquez's efforts were dedicated to portraiture. Mythological subjects would at times occupy his attention, as in Bacchus, also called The Drin...

• Leonardo da Vinci.

  Leonardo's stylistic innovations are even more apparent in The Last Supper, in which he represented a traditional theme in an entirely new way. Instead of showing the 12 apostles as individual figures, he grouped them in dynamic compositional units of three, framing the figure of Christ, who is isolated in the center of the picture.Seated before a pale distant landscape seen through a rectangular opening in the wall, Christ—who has just announced that one of those present will betrayhim—repres...

• San Jose (California) - geography.

  The San Jose metropolitan area is an economic powerhouse. It is the single most important high-technology center in the United States, specializing in aerospace andcomputer technology. Assisting in the area’s steady innovation is its many venture capital firms, which loan money to entrepreneurs starting new companies. It isestimated that the region contains one-half of the leading venture capital firms in the world. Among the nation’s largest companies in the San Jose metropolitan regionare Inte...

• 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...

• Chemical Analysis - chemistry.

  inorganic reactions than by organic functional group chemistry. VII SPECTROSCOPIC TECHNIQUES Spectroscopy, or the study of the interactions of electromagnetic radiation with matter, is the largest and most nearly accurate class of instrumental methods used inchemical analysis and indeed in all of chemistry ( see Spectroscopy; Spectrum). The electromagnetic radiation (emr) spectrum is divided into the following wavelength regions: X ray, ultraviolet, visible, infrared, microwave, and radiowave....

• What am I going to do, I need more room,

  children's section,themore Ilooked athim, themore unsure Iwas, themore Iwanted itto be him, hadhegone towork instead ofto his death? Myhands shookagainst thechange inmy pockets, Itried nottostare, Itried nottoreach my arms outinfront ofme, could itbe, did herecognize me,he'd written, "Itismy great hopethatourpaths, however long and winding, willcross again." Fiftyyears laterhewore thesame thickglasses, I'dnever seenawhiter shirt,hehad ahard time letting goofbooks, Iwent uptohim. "Idon't speak,"...

• Brontë: From Jane Eyre - anthology.

  He rang and despatched an invitation to Mrs Fairfax, who soon arrived, knitting-basket in hand. ’Good-evening, madam; I sent to you for a charitable purpose: I have forbidden Adèle to talk to me about her presents, and she is bursting with repletion; have thegoodness to serve her as auditress and interlocutrice: it will be one of the most benevolent acts you ever performed.’ Adèle, indeed, no sooner saw Mrs Fairfax, than she summoned her to her sofa, and there quickly filled her lap with...

• Leonardo da Vinci I INTRODUCTION Leonardo da Vinci Leonardo da Vinci was known not only as a masterful painter but as an architect, sculptor, engineer, and scientist.

  and conservation program made use of the latest technology to reverse some of the damage. Although much of the original surface is gone, the majesty of thecomposition and the penetrating characterization of the figures give a fleeting vision of its vanished splendor. The Virgin of the RocksThe Virgin of the Rocks by Leonardo da Vinci was actually painted twice. The first version, done in 1485, wascommissioned to be an altarpiece but was evidently rejected. That painting now hangs in the Louvre,...

• 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...

• Excerpt from Timon of Athens - anthology.

  Ha? A drum? Th' art quick,But yet I'll bury thee. Thou'lt go, strong thief,When gouty keepers of thee cannot stand.Nay, stay thou out for earnest. He keeps some of the gold, and buries the rest Enter Alcibiades, with drum and fife, in warlike manner; and Phrynia and Timandra ALCIBIADES. What art thou there? Speak. TIMON. A beast, as thou art. The canker gnaw thy heartFor showing me again the eyes of man! ALCIBIADES. What is thy name? Is man so hateful to theeThat art thyself a man? TIMON. I am M...

• Physical Chemistry - chemistry.

  by the system in the form of the flow of electrical currents, formation of surfaces and changes in surface tension, changes in volume or pressure, and formation ordisappearance of chemical species. B Chemical Kinetics This field studies the rates of chemical processes as a function of the concentration of the reacting species, of the products of the reaction, of catalysts and inhibitors, ofvarious solvent media, of temperature, and of all other variables that can affect the reaction rate. It is...

• Tobacco - biology.

  quality cigars are made entirely by hand, most cigars are manufactured by machine. Chewing tobaccos are generally made from thick grades of leaves to which binders and flavorings are added. Chewing tobacco is formed by pressing the tobacco intoblocks known as plugs. Snuff is made by grinding tobacco into fine powder, which is then allowed to ferment for a long period of time. Frequently, snuff is scented withspices, such as jasmine or cloves. V TOBACCO INDUSTRY Over 6 million tons of commercial...

• Aegean Civilization .

  warlike. The styles are also more formal and geometric than those of earlier examples, anticipating the art of classical Greece. A typical Mycenaean city had, at its center, the fortress palace of the king. The cities were fortified with massive structures of unevenly cut stones, known as Cyclopeanwalls. The Linear B tablets from this time include names of Greek gods, such as Zeus, and contain detailed records of royal possessions. The gold masks, weapons, andjewelry found by Schliemann at the r...

• Aegean Civilization - USA History.

  warlike. The styles are also more formal and geometric than those of earlier examples, anticipating the art of classical Greece. A typical Mycenaean city had, at its center, the fortress palace of the king. The cities were fortified with massive structures of unevenly cut stones, known as Cyclopeanwalls. The Linear B tablets from this time include names of Greek gods, such as Zeus, and contain detailed records of royal possessions. The gold masks, weapons, andjewelry found by Schliemann at the r...

• Protestantism.

  F England The Anglican Church became the established church in England when Henry VIII assumed (1534) the ecclesiastical authority over the English church that had previouslybeen exercised by the pope. Henry’s motive was to annul his marriage to Catherine of Aragón rather than to reform church doctrine, and he imposed severe lawsupholding the major tenets of medieval Catholicism. Under King Edward VI and Queen Elizabeth, however, the Anglican Church developed a distinctly Protestant creedthat w...

• 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...

• Skiing.

  Safety is very important to all skiers, and all Alpine resorts have a ski patrol. The ski patrol’s responsibility is to take care of injured skiers, to mark hazardous spots ontrails, to make sure that trails are in good condition before opening them, and, at times, to act as traffic police in congested areas. Skiers are also responsible for takingtheir own safety into consideration, as well as that of others. Anyone who participates in the sport should be aware of the Skier’s Responsibility Code...

• Nebraska - geography.

  by natural resource districts to limit the rate of pumping for irrigation. C Climate Nebraska has a typical continental climate with wide seasonal variations in temperature. C1 Temperature Winter temperatures below -20°C (0° F) and summer temperatures in the upper 30°s C (lower 100°s F) are common. The average January temperature varies from about -7° C (about 20° F) in the northeast to about -2° C (about 29° F) in the southwest. The average for July, thehottest month, ranges from about 26° C...

• Nebraska - USA History.

  by natural resource districts to limit the rate of pumping for irrigation. C Climate Nebraska has a typical continental climate with wide seasonal variations in temperature. C1 Temperature Winter temperatures below -20°C (0° F) and summer temperatures in the upper 30°s C (lower 100°s F) are common. The average January temperature varies from about -7° C (about 20° F) in the northeast to about -2° C (about 29° F) in the southwest. The average for July, thehottest month, ranges from about 26° C...

• Democratic Republic of the Congo - country.

  Except in the high elevations, the country’s climate is very hot and humid. The average annual temperature in the low central area is about 27°C (about 80°F).Temperatures are considerably higher in February, the hottest month. At altitudes above about 1,500 m (about 5,000 ft) the average annual temperature is about 19°C(about 66°F). Average annual rainfall is about 1,500 mm (about 60 in) in the north and about 1,300 mm (about 50 in) in the south. Frequent heavy rains occur fromApril to November...

• Stone Age.

  limestone, quartzite, and indurated shale. Ground stone tools could be made on a wider range of raw material types, including coarser grained rock such as granite. Flaking produces several different types of stone artifacts, which archaeologists look for at prehistoric sites. The parent pieces of rock from which chips have beendetached are called cores, and the chips that have been removed from cores are called flakes. A flake that has had yet smaller flakes removed from one or more edgesin orde...

• 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...

• Technology.

  loose soil in this region, known as the Fertile Crescent, was easily scratched for planting, and an abundance of trees was available for firewood. By 5000 BC, farming communities were established in areas known today as Syria, Turkey, Lebanon, Israel, Jordan, Greece, and the islands of Crete and Cyprus. Agricultural societies in these places constructed stone buildings, used the sickle to harvest grain, developed a primitive plowstick, and advanced their skills inmetalworking. Trade in flint al...

• Saskatchewan (province) - Geography.

  The length of the frost-free season varies within the province. In the southwest, particularly in the valley lands along the South Saskatchewan River, the frost-freeperiod ranges from 150 to 160 days. Regina enjoys about 123 frost-free days, and Saskatoon has about 111. The far north has only from 85 to 95 frost-free days. One important characteristic of Saskatchewan’s climate is the great variability in temperature and precipitation from year to year, which is often critical for agriculture.The...

• Saskatchewan (province) - Canadian History.

  The length of the frost-free season varies within the province. In the southwest, particularly in the valley lands along the South Saskatchewan River, the frost-freeperiod ranges from 150 to 160 days. Regina enjoys about 123 frost-free days, and Saskatoon has about 111. The far north has only from 85 to 95 frost-free days. One important characteristic of Saskatchewan’s climate is the great variability in temperature and precipitation from year to year, which is often critical for agriculture.The...

• Quasar - astronomy.

• Peut on unifier l'histoire ?

  et des deux caractéristiques propres à Dieu : sa toute-puissance et sa bonté. Dès lors, les événements chaotiques de l’histoire ne remettent aucunement en question le développement de ce que Hegel nomme l’Esprit Absolu, c’est-à-dire la raison humaine qui finira à terme par se révéler pleinement à elle-même. Bien au contraire, c’est à travers les périodes de l’histoire que l’Esprit absolu s’accomplira, c’est par la force de cette contradiction, de ce que ces évènements opposent à la raison,...

• Vision.

  fluid from inside the eye. The pressure in the eye slowly rises and over many years may cause damage to the optic nerve, eventually resulting in blindness. Maculardegeneration is a serious eye condition that is usually associated with aging. The macula is vital for clear, sharp sight. In people with macular degeneration,deteriorating cells or abnormal blood vessel growth in the macula cause blurred vision in the central area of focus. Vision loss associated with macular degenerationcannot be cor...

• micromegas

  Micromégas de Voltaire 1752 L’histoire se passe sur plusieurs planètes, dans laquelle on a un Habitant de la planète Sirius qui s’appelle Micromégas c’est géant, il est à la fois un philosophe, un savant et explorateur sert à Voltaire pour représenter l'esprit des Lumières ses qualités de philosophe. Et on a l'Habitant de Saturne qui se fie plus à son instinct et aux préjugés « plus les animaux sont petits moins ils sont intelligents ». C’est un homme très intelligents. Le début du liv...

• Edwin Hubble.

  California. The Hale telescope was the largest telescope in the world from when it went into operation in 1948 until the Keck telescope at the Mauna Kea Observatory inHawaii was completed in 1990. The Hubble Space Telescope (HST), a powerful telescope launched in 1990 and carried aboard a satellite in orbit around Earth, wasnamed after Hubble and has helped scientists make many important observations. Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.

• Space Telescope - astronomy.

  of its normal companion star and heating it to millions of degrees. See also X-Ray Astronomy; Chandra X-Ray Observatory. D2 Gamma-Ray Space Observatories Studying gamma rays offers scientists answers to some of the most perplexing questions about the explosive and dynamic physical processes in the universe. Gamma-ray observation also provides clues about the structure and dynamics of the Milky Way and other galaxies; the nature of pulsars, quasars, black holes, and neutronstars; and the orig...

• Milky Way - astronomy.

  Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.

• Infrared Space Observatory - astronomy.

  know how often these disks occur around stars to help them understand how common it is for planets to form. ISO found several previously unknown stars with disks.ISO also detected olivine, a silicate mineral found in Earth’s own rocky mantle, in the comet Hale-Bopp, which was visible from Earth in 1996 and 1997. The discovery ofolivine in the comet suggests that the comet and Earth have a similar origin. The satellite also detected the first evidence of water outside of the solar system inplanet...

• Impressionism (art) I INTRODUCTION Vegetable Garden at the Hermitage, Pontoise Vegetable Garden at the Hermitage, Pontoise (1879) was painted by the French artist Camille Pissarro.

  the Grass; 1863, Musée d’Orsay, Paris), which depicts a nude woman at a woodland picnic. To emphasize the woman’snakedness, Manet not only shows that she has recently disrobed (by painting her clothes in a heap nearby) but alsodepicts her male companions fully clothed. In addition, the woman stares directly and unabashedly at the viewer, makingus feel almost like voyeurs as we gaze back. Manet’s painting style–the flat figures, which look almost like cutouts, andloose brushwork–also bewildered a...

• Hardware (computer).

  Magnetic tape drives use magnetic tape similar to the tape used in VCR cassettes. Tape drives have a very slow read/write time, but have a very high capacity; in fact,their capacity is second only to hard disk drives. Tape drives are mainly used to back up data. Compact disc drives store information on pits burned into the surface of a disc of reflective material ( see CD-ROM). CD-ROMs can store up to 737 megabytes (MB) of data. A Compact Disc-Recordable (CD-R) or Compact Disc-ReWritable (CD-RW)...

• Colour and qualia

  Faced with the dilemmas posed by subjective colour for physicalist doctrine, some philosophers opt for eliminativism, the doctrine that subjective colour is not a genuine, or real, phenomenon after all. On this view the source of the puzzle is a conceptual confusion; a tendency to extend our judgments concerning objective colour, what appear to be intrinsic properties of the surfaces of physical objects, onto the properties of our mental states. Once we see that all that is happening ‘inside'...

• Meteorology.

  to find the corresponding relative humidity and dew-point temperature. III SPECIAL METEOROLOGICAL INSTRUMENTS Meteorologists have developed several sophisticated instruments that measure multiple physical characteristics of the air simultaneously and at more than one location.The most important of these special instruments are radiosondes, Doppler radar, and weather satellites. A Radiosonde A radiosonde measures air temperature, air pressure, and humidity from the earth’s surface up to an alt...

• Titian.

  Flaying of Marsyas (circa 1570-76, Kroměříž, Czech Republic) and the Nymph and Shepherd (circa 1574, Kunsthistorisches Museum). Here colors are more subdued, but the turbulence of the brushwork, hardly matched again until 20th-century painting, almost submerges the form entirely. These late mythological paintings, whichTitian called poesie (poems), stand among the most formidable statements ever made of the irresistible, elemental powers of nature. These works are paralleled by a sequence...

• Planetary Science - astronomy.

  III ORIGINS AND COMPOSITIONS OF PLANETS Astronomers believe that planetary systems are formed of elemental materials that were created in the interiors of giant stars. Some of this material comes from giantstars that shed material into space as they age. Most of the matter to form planets, however, comes from stars that explode as supernovas and spread debris enrichedwith the heavier chemical elements into space. According to the currently accepted views, the most likely first stage in the evo...

• Athens (Greece) - geography.

  expected to further develop the city’s tourism industry. Athens serves as the hub of Greece’s national transportation network. The Greek railway system is centered in Athens, and ferries sail to the rest of the country from theport at Piraeus. The urban area itself in Athens is served by taxis and public buses that must contend with heavily congested traffic. The major part of the city’s metrosubway, Attiko Metro (Athens Metro), was completed in 2000 and serves the heart of Athens; extensions to...

• From The Pilgrim's Progress - anthology.

  First, The pilgrims were clothed with such kind of raiment as was diverse from the raiment of any that traded in that fair. The people, therefore, of the fair, made agreat gazing upon them: some said they were fools, some they were bedlams, and some they are outlandish men. (I Corinthians ii.7, S.) Secondly, And as they wondered at their apparel, so they did likewise at their speech; for few could understand what they said; they naturally spoke the language ofCanaan, but they that kept the f...

• Edmonton - Geography.

  both of which built fur trading posts near present-day Edmonton in 1795. The posts were rebuilt several times, always along the North Saskatchewan River, whichprovided the traders’ main transportation route. The last move came in 1830, when Fort Edmonton was erected on the high bluff where the Alberta Legislature nowstands. For the next 50 years, the fort was the major trading center on the western plains. The modern city began to take shape after 1900, when central Alberta was opened to Europea...

• Romanticism I INTRODUCTION Romanticism, in art, European and American movement extending from about 1800 to 1850.

  and the composition so dynamic that the effect is of chaos engulfing the immobile and indifferent figure of the dying king. IV GERMANY Two Men on a SeashoreTwo Men on a Seashore (1835) by German artist Caspar David Friedrich can be interpreted as a symbolic expression ofthe artist’s Christian faith. The sea is a symbol of death and the rocks on the beach stand for faith and the future. Themoon symbolizes Christ. This drawing in pencil and sepia ink closely resembles in its design a painting by...

• Art Nouveau I INTRODUCTION Detail of Art Nouveau Decoration This detail of a door decoration from a building constructed in the early 20th century in Milan, Italy, illustrates the stylistic themes associated with art nouveau.

  Wallpaper by William MorrisIn the early 19th century manufacturers began to mass-produce wallpaper, and the quality of designs suffered. WilliamMorris, a British artist who had become interested in the design of household furnishings and items for everyday use,began to create handmade wallpapers that he integrated into the overall design of the home. This artichoke design isbased on stylized plant motifs, a common theme in art nouveau designs.Art Resource, NY Art nouveau in Britain evolved out o...

• 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 Hard Times - anthology.

  Mr Bounderby, the two gentlemen at this present moment walking through Coketown, and both eminently practical, who could, on occasion, furnish more tabularstatements derived from their own personal experience, and illustrated by cases they had known and seen, from which it clearly appeared—in short it was the onlyclear thing in the case—that these same people were a bad lot altogether, gentlemen; that do what you would for them they were never thankful for it, gentlemen; thatthey were restless,...

• Inuit.

  VII HOUSING, TRANSPORTATION, AND CLOTHING Inuit homes are of two kinds: walrus or sealskin tents for summer and huts or houses for winter. Winter houses are usually made of stone, with a driftwood orwhalebone frame, chinked and covered with moss or sod. The entrance is a long, narrow passage just high enough to admit a person crawling on hands and knees.During long journeys some Canadian Inuit build igloos, winter houses of snow blocks piled in a dome shape (the term igloo comes from the I...

• Midnighters

• Mercury (planet) - astronomy.

  In 1991 powerful radio telescopes on Earth revealed signs of possible deposits of ice in the polar regions of Mercury. These ice deposits occur in areas where sunlightnever falls, such as crater bottoms near both of the planet’s poles. Similar ice deposits may have been found during the 1990s near the poles of the Moon by theClementine and Lunar Prospector spacecrafts. The ice on Mercury likely comes from comets or water-bearing meteorites that have hit Mercury over the planet’s historyup throug...

• From The Sound and the Fury - anthology.

  'You'd better slip on your pants and run,' he said. He went out. I got up and moved about, listening to him through the wall. He entered the sitting-room, toward the door. 'Aren't you ready yet?' 'Not yet. Run along. I'll make it.' He went out. The door closed. His feet went down the corridor. Then I could hear the watch again. I quit moving around and went to the window and drew thecurtains aside and watched them running for chapel, the same ones fighting the same heaving coat-s...