139 résultats pour "scala"
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History of United States Business.
their lives. But the rewards were worth it; a few lucrative voyages and a merchant could buy a townhouse, a carriage, perhaps a summer retreat. The merchant couldclimb the social ladder and circulate among the powerful in this highly materialistic society. This prospect of riches and the honor that accompanied them made Americancolonists willing to engage in highly speculative enterprises, such as shipping flour to the West Indies or importing goods from England by the thousands without beingcer...
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Bangladesh - country.
F Environmental Issues Waterborne diseases such as cholera are a serious threat to public health in Bangladesh. Until the 1970s, many of Bangladesh’s people became sick from drinkingpolluted water drawn from surface rivers. Aid agencies such as the United Nations Children’s Fund (UNICEF) built shallow wells throughout the country to help provide asafe source of drinking water to Bangladesh’s poor. In the 1990s, however, it was discovered that many of these wells were contaminated by arsenic, a...
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Kazakhstan - country.
mismanagement. Between 1949 and 1991 the Soviet government conducted about 70 percent of all of its nuclear testing in Kazakhstan, mostly in the northeastern area near the city ofSemipalatinsk (now Semey). Nearly 500 nuclear explosions occurred both above and below ground near Semipalatinsk, while more than 40 nuclear detonationsoccurred at other testing grounds in western Kazakhstan and in the Qyzylqum desert. More than 1 million of Kazakhstan’s inhabitants were exposed to dangerous levelsof ra...
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Mars (planet) - astronomy.
The Martian core is probably much like Earth’s, consisting mostly of iron, with a small amount of nickel. If other light elements, particularly sulfur, exist there as well, thecore may be larger than presently thought. From studying Earth’s magnetic field and core, scientists theorize that the motions of the liquid rock in Earth’s core generateits magnetic field. Mars does not have a significant magnetic field, so scientists believe that Mars’s core is probably solid. However, spacecraft data in...
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Giuseppe Verdi (Histoire de la musique)
•Il y retrouve avec plaisir l'ex-prima donna Giuseppina Strepponi, qui donne des leçons de chant très prisées depuis un an. l'amour les enflamme, ils ne se quitteront plus. Il s'installe avec elle dans une maison à Passy, et y reste environ deux ans, avec quelques voyages en Italie, notamment à Milan quand il en apprend l'insurrection des« Cinq Journées», en mars 1848. RETOUR À BusSETO • Verdi et Strepponi reviennent tous deux vivre à Busseto en ju...
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Turtle.
Turtles use their jaws to cut and handle food. Instead of teeth, a turtle’s upper and lower jaws are covered by horny ridges, similar to a bird’s beak. Meat-eating turtlescommonly have knife-sharp ridges for slicing through their prey. Plant-eating turtles often have ridges with serrated edges that help them cut through tough plants.Turtles use their tongues in swallowing food, but unlike many other reptiles, such as chameleons, they cannot stick out their tongues to capture food. C Limb Structu...
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Turtle - biology.
Turtles use their jaws to cut and handle food. Instead of teeth, a turtle’s upper and lower jaws are covered by horny ridges, similar to a bird’s beak. Meat-eating turtlescommonly have knife-sharp ridges for slicing through their prey. Plant-eating turtles often have ridges with serrated edges that help them cut through tough plants.Turtles use their tongues in swallowing food, but unlike many other reptiles, such as chameleons, they cannot stick out their tongues to capture food. C Limb Structu...
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Fire - chemistry.
were usually natural caves. Eventually people learned to dip branches in pitch to form torches. They created crude lamps by filling a hollowed out piece of stone withmoss soaked in oil or tallow (a substance derived from animal fat). By cooking with fire, prehistoric people made the meat of the animals they killed more palatable and digestible. They learned to preserve meat by smoking it over a fire,vastly decreasing the danger of periodic starvation. Cooking also enabled them to add some for...
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Quantum Theory
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INTRODUCTION
Quantum Theory, in physics, description of the particles that make up matter and how they interact with each other and with energy.
electron in the same way a particle with momentum would: It bumps the electron and changes the electron’s path. The light is also affected by the collision as though itwere a particle, in that its energy and momentum changes. Momentum is a quantity that can be defined for all particles. For light particles, or photons, momentum depends on the frequency, or color, of the photon, which in turndepends on the photon’s energy. The energy of a photon is equal to a constant number, called Planck’s cons...
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Sun - astronomy.
A The Sun’s Place in the Milky Way The Milky Way Galaxy contains about 400 billion stars. All of these stars, and the gas and dust between them, are rotating about a galactic center. Stars that arefarther away from the center move at slower speeds and take longer to go around it. The Sun is located in the outer part of the galaxy, at a distance of 2.6 × 10 17 km (1.6 × 10 17 mi) from the center. The Sun, which is moving around the center at a velocity of 220 km/s (140 mi/s), takes 250 million y...
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Iowa - geography.
Okoboji, Lost Island, Silver, and West Swan lakes. In addition, reservoirs have been created by damming several smaller Iowa rivers. There are a number of largereservoirs behind dams on the Mississippi River along the Iowa state line. C Climate Iowa’s climate is characterized by warm, generally moist summers and cold winters. Temperatures vary considerably from season to season and, at times, from day today. However, monthly averages are relatively uniform throughout the state and usually vary...
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Iowa - USA History.
Okoboji, Lost Island, Silver, and West Swan lakes. In addition, reservoirs have been created by damming several smaller Iowa rivers. There are a number of largereservoirs behind dams on the Mississippi River along the Iowa state line. C Climate Iowa’s climate is characterized by warm, generally moist summers and cold winters. Temperatures vary considerably from season to season and, at times, from day today. However, monthly averages are relatively uniform throughout the state and usually vary...
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Atom - chemistry.
Atoms have several properties that help distinguish one type of atom from another and determine how atoms change under certain conditions. A Atomic Number Each element has a unique number of protons in its atoms. This number is called the atomic number (abbreviated Z). Because atoms are normally electrically neutral,the atomic number also specifies how many electrons an atom will have. The number of electrons, in turn, determines many of the chemical and physical properties ofthe atom. The ligh...
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Maria Collas (1923-1977) (Exposé – Art & Littérature – Collège/Lycée)
à jouer de son personnage : ce sera l'un de ses talents que d'apparaître , très v~e. dans son propre rôle. UNE RÉVOLUTION DANS L'ART LYRIQUE • le mythe ne se tisse pas seulement d'anecdotes et de médiatisation. La Callas est d'abord une très grande cantatrice , une voix comme l'on n 'en rencontre qu'une par siècle . • Non qu'elle soit parfaite , cette voix. e~ dès 1957, la cantatr ice se plaint de ses cordes vocales. C'est sur un cc couac» c...
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Milan.
en 1535, annexée à l'Espagne par Charles Quint (qui en fit don à son fils Philippe), et le resta pendant près de deux siècles. Rattachée à l'Autriche en 1714 par le traité de Rastatt, capitale des éphémères Républiques cisalpine (1797) et italienne (1802), puis du royaume d'Italie (1805), Milan retomba après 1815 sous domination autrichienne, et devint la capitale du royaume lombard-vénitien. Le soulèvement de mars 1848 contre le gouverneur autrichien Radetzky échoua, mais Milan fut rattachée au...
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ESPOIR (L') - Roman d'André Malraux (analyse détaillée)
Ximénès, ainsi qu'à Madrid autour d'une caseme occupée par les franquistes. Dans la sierra, les miliciens mènent une guérilla que le communiste Manuel s'efforce d'organiser. Une escadrille inter nationale commandée par le Français Magnin accomplit plusieurs missions, notamment près de Medellin où elle détruit une colonne «maure» qu'elle poursuit jusqu'au cœur de la ville. De grands dialogues idéologiques, politiques ou artis tiques se nouent e...
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Raphael (painter)
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INTRODUCTION
Raphael's La Belle Jardinière
Completed in 1508 in Florence, La Belle Jardinière is one of the most famous Madonna portraits of Italian Renaissance
painter Raphael.
III ROMAN PERIOD Leo I and AttilaThis fresco by Italian Renaissance painter Raphael, Leo I Repulsing Attila (1512-1514, Vatican), depicts the confrontationbetween Pope Leo I and Attila the Hun outside Rome in the 5th century. Whereas the figures on the left exemplify theclassical poise typical of the High Renaissance, the tumultuous activity of the figures on the right prefigures the dynamicenergy of the later baroque style.Scala/Art Resource, NY In 1508 Raphael was called to Rome by Pope Juli...
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Roman Art and Architecture - history.
house, records office, and basilica. Imperial Forum, RomeThe Roman Forum was founded at the beginning of the Roman republic (around 500 bc), and it continued to develop into the late 2ndcentury ad. Among the ruins seen here are the Temple of Antoninus and Faustina (since converted into a church, background, left),the foundations of the Basilica Julia (foreground, center), and the three remaining columns of the Temple of Castor and Pollux(background, right).Donadoni/Bruce Coleman, Inc. The basili...
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Church (building)
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INTRODUCTION
Church (building), a building designed for worship for groups of Christians.
nearby was a basilica; the two are now combined in one building, known as the Church of the Holy Sepulchre. The original Saint Peter's Basilica in Rome, replaced bythe present church during the Renaissance, was a huge processional basilica with projecting wings—transepts—forming a Latin cross in plan. The domed, centralizedform persisted in the Byzantine and Slavic East, where medieval churches, small in scale, often took the form of five domes arranged on a Greek cross plan. IV MEDIEVAL EUROPE...
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Nova - astronomy.
When first discovered, the spectrum of a nova shows that the expanding layers of gas that cause the brightening have temperatures of 40,000° to 50,000° C (70,000°to 90,000° F)—about eight times as hot as the surface of the Sun. By the time a nova reaches maximum brightness, the temperature of the material has fallen to about10,000° C (about 20,000° F), or lower. Just after maximum brightness, the escaping cloud of gas cools and expands enough to become transparent. This transparency allows astro...
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Chinese Music
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INTRODUCTION
Classical Peking Opera
Of the many major forms of regional theater in China, Peking opera is by far the most famous.
World Music TourClick on the instruments to hear music from around the world.© Microsoft Corporation. All Rights Reserved. However, the Confucian beliefs about music were constantly eroded throughout Chinese history by a long tradition of popular entertainment music, favored both at thecourt and by the common folk. Although excluded from official ritual performances for several thousand years, Chinese women musicians and entertainers had a centraland formative role in this entertainment music as...
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House (architecture)
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INTRODUCTION
Trulli in Alberobello, Italy
Alberobello, in the Apulia region of southeastern Italy, is noted for its unusual limestone houses known as trulli (from
Greek trullos, dome).
Fresco in the Villa of the Mysteries, PompeiiThe Villa of the Mysteries, Pompeii, Italy (built about 50 bc), featured a large hall with this mural encircling it. The mural ispainted in the Second Style of Roman painting. (Historians of art recognize four periods or styles in Roman wall painting.)The mural in the Villa of the Mysteries is thought to depict the initiation rituals of a mystery religion. For this reason, it hasbeen conjectured that the hall was used for cult rituals.Bridgeman Art Li...
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Temple (building)
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INTRODUCTION
Wat Phra Kaeo
Thailand has nearly 18,000 Buddhist temples, called wats, throughout the country.
colonnaded terraces connected by ramps. The surrounding area was planted with trees and flowers during Hatshepsut’sreign and for many years after.Gian Berto Vanni/Art Resource, NY In ancient Egypt, temples were grandiose, built of huge blocks and columns of stone. Often they were enlarged by successive rulers to form strung-out series of templeparts, as in the gigantic Temple of Amon (circa 1550-1070 BC) at Al Karnak. The Nile cliffs were used as settings for temples, such as the massive mortuar...
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Eagle - biology.
States, is a member of this group found only in North America. It is named for its snow-white head. However, the name bald does not refer to a lack of feathers but comes instead from an outdated word meaning marked with white, as in piebald. The adult bald eagle is blackish brown, with a white head and tail. Its bill, legs, and feet are bright yellow. The bill, which is longer and heavier than the gray bill of golden eagles, is useful for piercing the skin of fish. Bald eagles vary in size....
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Shang Dynasty - History.
The dynastic ancestors belonged to an elaborate religious pantheon that also included various nature powers and the Shang high god, Di. The higher powers were lessconcerned with the well-being of Shang society than the ancestors were. Di, whose wishes were often hard to determine, could even cause the Shang harm. The naturepowers could occasionally influence the wind, rain, and harvests, but only Di could actually order the weather. For an agricultural society such as the Shang, this wasperhaps...
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Warsaw - geography.
VI ECONOMY In addition to serving as Poland's leading administrative center, Warsaw is also a center for science, research, and higher education. Since World War II the city'sindustrial base has been developed, with diverse plants producing steel, cars, tractors, and consumer electronics. Warsaw is the second most important industrial regionin Poland (after Katowice in the south). Warsaw, more than anywhere else in the country, has benefited from the boom in construction and commerce that foll...
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Poliomyelitis.
Physical therapy helps patients with paralytic polio stretch and move affected muscles. This movement minimizes the atrophy, or shrinkage, of affected muscles andlimbs and builds strength. Exercises can also retrain working muscles to compensate for other muscles that have permanently lost the ability to move. Rehabilitativetherapy trains patients to use braces, crutches, and other devices that provide support and aid mobility. V PREVENTION OF POLIO Immunization with polio vaccine is the best w...
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Rock Music
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INTRODUCTION
Carlos Santana
Mexican-born guitarist Carlos Santana became a superstar in the late 1960s with a string of hits and an appearance at the
famous Woodstock rock festival in 1969.
point (a single pitch sustained through a progression of chords), and the parallel movement of chords, derived from a technique on the electric guitar known as bar-chording. Many elements of African American music have been a continuing source of influence on rock music. These characteristics include riffs (repeated patterns), backbeats (emphasizing the second and fourth beats of each measure; see Musical Rhythm: Pulse and Meter ), call-and-response patterns, blue notes (the use of certain...
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Iran-Iraq War - History.
The Iranian offensives of 1982 set a pattern that continued for the rest of the war. Exploiting their superiority in numbers, Iran sent its Revolutionary Guard on theattack, supported by regular military forces. Outnumbered Iraqi forces inflicted heavy losses on the Iranians but ultimately fell back. As soon as the initial Iranian thrusthad exhausted itself, however, the Iraqi army exploited Iranian disorganization and lack of equipment to retake much of the lost territory. As the war continued,...
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Toys.
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INTRODUCTION
Toys, objects that serve as playthings for children. Although the
clay. These readily available elements were also used to make more elaborate toys as human society advanced. Archaeologists have found primitive, handmade toys such as wooden or cloth dolls, clay marbles, and terracotta figures that date back thousands of years. In ancientEgypt, Greece, and Rome, people placed dolls or clay figures in the graves or tombs of children for them to play with in the afterlife. The yo-yo may seem like a 20th-century fad, but it actually dates back at least 2,500 years...
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Air Pollution.
Several pollutants attack the ozone layer. Chief among them is the class of chemicals known as chlorofluorocarbons (CFCs), formerly used as refrigerants (notably in airconditioners), as agents in several manufacturing processes, and as propellants in spray cans. CFC molecules are virtually indestructible until they reach thestratosphere. Here, intense ultraviolet radiation breaks the CFC molecules apart, releasing the chlorine atoms they contain. These chlorine atoms begin reacting withozone, br...
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Iranian Art and Architecture
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INTRODUCTION
Iranian Art and Architecture, the visual arts of Iran.
The first great development of ancient Persian architecture took place under the Achaemenid dynasty during the Persian Empire, from about 550 to 330 BC. Remains of Achaemenian architecture are numerous, the earliest being ruins at Pasargadae, the capital city of Cyrus the Great. These ruins include two palaces, a sacred precinct, acitadel, a tower, and the tomb of Cyrus. The palaces were set in walled gardens and contained central columnar halls, the largest of which was 37 m (111 ft) in length...
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Nuclear Weapons.
Regardless of the method used to attain a supercritical assembly, the chain reaction proceeds for about a millionth of a second, liberating vast amounts of heat energy.The extremely fast release of a very large amount of energy in a relatively small volume causes the temperature to rise to tens of millions of degrees. The resultingrapid expansion and vaporization of the bomb material causes a powerful explosion. VI PRODUCTION OF FISSILE MATERIAL Much experimentation was necessary to make the p...
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Syria - country.
D Education Primary education is free and compulsory for all children aged 6 through 12. Some 78 percent of the adult Syrian population was estimated to be literate in 2005.Primary schools enrolled 2.8 million pupils in the 2000 school year, and 1.1 million students attended secondary schools and vocational institutes. In 1998, 94,110 Syrian students were enrolled in institutes of higher education. Syria has universities in Damascus, Ḩalab, Ḩim ş, and Al L ādhiq īyah. Also in Damascus isthe Ar...
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Uzbekistan - country.
E Environmental Issues The evaporation of the Aral Sea is one of the worst ecological disasters in the world. The Aral has shrunk so much that it now holds only about one-fifth the volume ofwater it held in 1960. The shrinkage is due to irrigation withdrawals from the Amu Darya and Syr Darya, a practice that began on a massive scale in the early 1960s aspart of the Soviet Union’s ill-conceived drive to increase cotton yields in Central Asia. Growing cotton in the naturally arid and saline soil...
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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.”...
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Connecticut - geography.
The state’s shoreline, when all the bays and inlets are taken into account, has a total length of 995 km (618 mi). The coastline is deeply indented by long estuaries androcky inlets, and there are many sandy beaches and stretches of tidal marsh. There are several good harbors along the coast, the most important of which is at NewHaven. A few small islands lie offshore in Long Island Sound. D Climate Connecticut has long, hot summers and cold winters. The climate does not vary greatly from place...
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Connecticut - USA History.
The state’s shoreline, when all the bays and inlets are taken into account, has a total length of 995 km (618 mi). The coastline is deeply indented by long estuaries androcky inlets, and there are many sandy beaches and stretches of tidal marsh. There are several good harbors along the coast, the most important of which is at NewHaven. A few small islands lie offshore in Long Island Sound. D Climate Connecticut has long, hot summers and cold winters. The climate does not vary greatly from place...
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Poverty.
economic and demographic trends, and (7) welfare incentives. A Overpopulation Overpopulation, the situation of having large numbers of people with too few resources and too little space, is closely associated with poverty. It can result from highpopulation density (the ratio of people to land area, usually expressed as numbers of persons per square kilometer or square mile) or from low amounts of resources, or from both. Excessively high population densities put stress on available resources....
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Utah - geography.
Temperatures decrease from the south to the north in the state. In the mountains the average temperature drops about 0.5°C (about 1°F) for every about 300 m(about 1,000 ft) rise in elevation. Average July temperatures range from less than 16°C (60°F) in the mountains to more than 27°C (80°F) in a few locations insouthern Utah. At Salt Lake City average July temperatures range from a low of 18°C (64°F) to a high of 33°C (92°F). There is a great variation between daytime andnighttime temperatures,...
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Utah - USA History.
Temperatures decrease from the south to the north in the state. In the mountains the average temperature drops about 0.5°C (about 1°F) for every about 300 m(about 1,000 ft) rise in elevation. Average July temperatures range from less than 16°C (60°F) in the mountains to more than 27°C (80°F) in a few locations insouthern Utah. At Salt Lake City average July temperatures range from a low of 18°C (64°F) to a high of 33°C (92°F). There is a great variation between daytime andnighttime temperatures,...
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Afghanistan - country.
D Climate Most of Afghanistan has a subarctic mountain climate with dry and cold winters, except for the lowlands, which have arid and semiarid climates. In the mountains and afew of the valleys bordering Pakistan, a fringe effect of the Indian monsoon, coming usually from the southeast, brings moist maritime tropical air in summer.Afghanistan has clearly defined seasons: Summers are hot and winters can be bitterly cold. Summer temperatures as high as 49°C (120°F) have been recorded in thenorth...
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Nimia familiaritas parit contemptum
Trop de familiarité engendre le mépris
Dans la Scala Paradisi du Pseudo-Augustin (8 [Pl 40, 1001])...
Nimia familiaritas parit contemptum Trop de familiarité engendre le mépris Dans la Scala Paradisi du Pseudo-Augustin (8 [Pl 40, 1001]) cette expression est présentée comme un vu/gare proverbium. Si dans la lit:. térature classique l'unique parallèle semble être un passage du De deo S,Jcratis d' Apulée (cf. 4 : Parit enim conuersatio contemptum, raritas conciliai admirationem, . Cette expression existe encore dans nos langues européennes : en allemand, Zu grosse Vertraulichkeit erzeugt ~'érachtun...
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MUSIQUE: Arturo Toscanini
Arturo To s canini Arturo Toscanini est considéré comme l'un des plus grands chefs d'orchestre de la première moitié du xx• siècle. Son exceptionnelle oreille musicale et son incroyable mémoire lui permirent de continuer à donner des concerts jusqu 'à la fin de sa vie, en dépit d ' une vue défaillante. A rturo Toscanini est né en 1867 à Parme , dans une famille extrêmement modeste. Son père Claudio, qui avait combattu en...
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Oper: Der Troubadour - Texte.
Teatro alla Scala, Mailand Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. Alle Rechte vorbehalten.
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Temperature
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INTRODUCTION
Thermometers
Mercury and digital thermometers are the most common types of household devices for measuring body temperature.
range of the water, which differs for various species. Thus, for example, the increase in temperature of river water by only a few degrees as a result of heat dischargedfrom power plants may kill most of the native fish. See Water Pollution. The properties of all materials are also markedly affected by temperature changes. At arctic temperatures, for example, steel becomes very brittle and breaks easily,and liquids either solidify or become very viscous, offering high frictional resistance to...
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Oper: Die Zauberflöte - Texte.
Sarastro auf seinem Thron, umgeben von den Priestern, feiert mit Tamino und Pamina den Sieg der Sonne über die Finsternis. Teatro alla Scala, Mailand Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. Alle Rechte vorbehalten.
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Modèle de Solow
The steady state is x= 1 + 1 2 x i.e. x= 2 We have f0 (x ) = dx t+1 dx t = 1 2 Then the system converges monotonically towards the steady state. Consider the example xt+1 = 1 + 2 x t the steady state is x= 1 + 2 x i.e. x= 1 We have f0 (x ) = dx t+1 dx t = 2 Then the system diverges monotonically from the steady state. Consider the example xt+1 = 1 1 2 x t The steady state is x= 1 1 2 x i.e. x= 2 3 We have f0 (x ) = dx t+1 dx t = 1 2 Then the system converges in a oscillatory way towards the stea...
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Music
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INTRODUCTION
World Music Tour
Click on the instruments to hear music from around the world.
Duke EllingtonAmerican composer, bandleader, and pianist Duke Ellington endures as perhaps the most important pioneer in big-bandjazz. Ellington and his orchestra shared a special interdependent relationship: Using the band as his musical workshop,Ellington derived his orchestra’s tone coloring from the unique sound qualities of the group’s individual players. Thisparticular style was later dubbed the “Ellington Effect” by jazz arranger Billy Strayhorn, who also wrote one of the band’ssignature...
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Oper: Così fan tutte - Texte.
Despina gibt Anweisungen für die Vorbereitungen zur Hochzeit. Während die beiden Paare auf ihre Verbindung anstoßen, kommen Don Alfonso und der Notar Beccavivi (wieder die verkleidete Despina). Ein Militärmarschkündigt inzwischen die Rückkehr Ferrandos und Guglielmos an. Tief erschrocken zwingen Fiordiligi und Dorabella die „Albanier”, sich im Nebenzimmer zuverstecken. Die beiden Offiziere treten ein; Despina lässt die Maske fallen und Don Alfonso klärt die beiden Schwestern über den ihnen gespi...