55 résultats pour "column"

• Spinal Column.

• Frida Khalo - La columna rota

• Statistics I INTRODUCTION Statistics, branch of mathematics that deals with the collection, organization, and analysis of numerical data and with such problems as experiment design and decision making.

  Professional pollsters typically conduct their surveys among sample populations of 1,000 people. Statistical measurementsshow that reductions in the margin of error flatten out considerably after the sample size reaches 1,000.© Microsoft Corporation. All Rights Reserved. The raw materials of statistics are sets of numbers obtained from enumerations or measurements. In collecting statistical data, adequate precautions must be taken tosecure complete and accurate information. The first problem of...

• Arithmetic I INTRODUCTION Arithmetic, branch of mathematics that arises from counting, the most basic mathematical operation.

  Subtract the units: 6 - 3 = 3. Then subtract the tens column: 6 – 2 = 4. The results of these two single-digit subtractions, written side by side, provide the answer: Subtraction is a bit more complicated if we need to subtract a larger digit from a smaller one. For example, when subtracting 47 from 92, the units value (7) of 47 isgreater than the units value (2) of 92. We can handle this situation using a procedure called borrowing, which is like carrying in reverse. Ten units can be borrowe...

• Iranian Art and Architecture I 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...

• Temple (building) I 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...

• Greek Art and Architecture - USA History.

  The struggle between these two city-states and their allies ultimately led to the Peloponnesian War (431-404 BC), which Sparta won. Despite this conflict, the 5th century, often called the Classical period, is usually considered the culmination of Greek art, architecture, and drama, with its highest achievements being the Temple ofZeus at Olympia, the Parthenon in Athens, and the plays of Athenian dramatists Aeschylus, Sophocles, Euripides, and Aristophanes. The 4th century, or Late Classical p...

• Vertebrados - ciencias de la naturaleza.

  tarde originará el cerebro) es pequeño con respecto al resto del encéfalo (cerebro, cerebelo y tronco cerebral) y se encarga de recibirinformación procedente de los sentidos. En reptiles y anfibios, el telencéfalo es más grande en proporción y comienza a enlazar lasinformaciones recibidas y a procesarlas. Las aves tienen unos lóbulos ópticos que están bien desarrollados; por ello el telencéfalo esmás grande. En los mamíferos, el telencéfalo predomina en la estructura cerebral. El más desarrollad...

• Greek Art and Architecture - history.

  powerful independent city-states. From 334 to 323 BC, Alexander the Great extended his father's empire into Asia Minor (now Turkey), Syria, Egypt, Persia, Afghanistan, and as far as India. D The Hellenistic Period (323-31 BC) Although Alexander the Great extended Greek civilization far beyond the Greek mainland and the boundaries of the Aegean Sea, his empire did not survive his death in 323.After Alexander died, his generals and successors divided the empire into a number of kingdoms: Ptolem...

• Eleanor Roosevelt.

  disliked Washington, D.C., which she found only slightly less provincial than Albany. Moreover, she feared that the role of first lady would be a confining one. “I neverwanted to be a president’s wife,” she privately declared just after the election. At the time of Franklin’s election Eleanor was an independent journalist, making money from a monthly column in Woman's Home Companion and from radio broadcasts, where she regularly spoke out on controversial political issues. She sat on the board...

• Eleanor Roosevelt - USA History.

  disliked Washington, D.C., which she found only slightly less provincial than Albany. Moreover, she feared that the role of first lady would be a confining one. “I neverwanted to be a president’s wife,” she privately declared just after the election. At the time of Franklin’s election Eleanor was an independent journalist, making money from a monthly column in Woman's Home Companion and from radio broadcasts, where she regularly spoke out on controversial political issues. She sat on the board...

• Statistics I INTRODUCTION Statistics, branch of mathematics that deals with the collection, organization, and analysis of numerical data and with such problems as experiment design and decision making.

  frequency, column (d), is the ratio of the frequency of an interval to the total count; the relative frequency is multiplied by 100 to obtain the percent relative frequency.The cumulative frequency, column (e), represents the number of students receiving grades equal to or less than the range in each succeeding interval; thus, thenumber of students with grades of 30 or less is obtained by adding the frequencies in column (c) for the first three intervals, which total 53. The cumulative relativef...

• Vertebrados - ciencias de la naturaleza.

  tarde originará el cerebro) es pequeño con respecto al resto del encéfalo (cerebro, cerebelo y tronco cerebral) y se encarga de recibirinformación procedente de los sentidos. En reptiles y anfibios, el telencéfalo es más grande en proporción y comienza a enlazar lasinformaciones recibidas y a procesarlas. Las aves tienen unos lóbulos ópticos que están bien desarrollados; por ello el telencéfalo esmás grande. En los mamíferos, el telencéfalo predomina en la estructura cerebral. El más desarrollad...

• Acropolis - geography.

  The Erechtheum is one of the most elaborate buildings on the Acropolis. Its plan is irregular, probably because of the sloping site and the need to preserve earlier placesof worship on the site or nearby. Porches project from three sides of the Erechtheum, but they are at different heights and are not centered on each side. GracefulIonic columns support the porches on the eastern and northern sides. Elegant caryatids (columns carved in the shape of draped female figures) support the Porch of t...

• Acropolis - USA History.

  The Erechtheum is one of the most elaborate buildings on the Acropolis. Its plan is irregular, probably because of the sloping site and the need to preserve earlier placesof worship on the site or nearby. Porches project from three sides of the Erechtheum, but they are at different heights and are not centered on each side. GracefulIonic columns support the porches on the eastern and northern sides. Elegant caryatids (columns carved in the shape of draped female figures) support the Porch of t...

• Hydrogen - chemistry.

  Hydrogen gas does not usually react with other chemicals at room temperature. That is, it does not split into two hydrogen atoms to combine with other chemicals. Thebond between the hydrogen atoms is very strong and can only be broken with a large amount of energy. However, when heated with a flame or a spark, hydrogen gaswill react violently with oxygen in the air to produce water in the following reaction: 2H2 + O 2 → 2H 2O This chemical equation shows that two hydrogen molecules (H 2) and o...

• Arte romano.

  las transacciones comerciales y los procesos judiciales, pero este edificio se adaptó en tiempos cristianos, convirtiéndose en la tipología de iglesia occidental con un ábside yun altar al final de la nave mayor. Las primeras basílicas se levantaron a comienzos del siglo II a.C. en el propio foro romano, pero es en Pompeya donde se encuentran losejemplos de basílicas más antiguas y mejor conservadas (c. 120 a.C.). En la Hispania romana se ha descubierto, gracias a diferentes excavaciones y a los...

• Arte romano - historia.

  las transacciones comerciales y los procesos judiciales, pero este edificio se adaptó en tiempos cristianos, convirtiéndose en la tipología de iglesia occidental con un ábside yun altar al final de la nave mayor. Las primeras basílicas se levantaron a comienzos del siglo II a.C. en el propio foro romano, pero es en Pompeya donde se encuentran losejemplos de basílicas más antiguas y mejor conservadas (c. 120 a.C.). En la Hispania romana se ha descubierto, gracias a diferentes excavaciones y a los...

• 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...

• Sistema nervioso - ciencias de la naturaleza.

  de organismos. En los animales simples, como los cnidarios, las células nerviosas forman una red capaz de mediar respuestas estereotipadas. En los animales máscomplejos, como crustáceos, insectos y arañas, el sistema nervioso es más complicado. Los cuerpos celulares de las neuronas están organizados en grupos llamadosganglios, que se interconectan entre sí formando las cadenas ganglionares. Estas cadenas están presentes en todos los vertebrados, en los que representan una parteespecial del siste...

• Michelangelo I INTRODUCTION Michelangelo (1475-1564), Italian painter, sculptor, architect, and poet whose artistic accomplishments exerted a tremendous influence on his contemporaries and on subsequent European art.

  (17 ft) tall, was carved from a block of stone that another sculptor had left unfinished. Michelangelo drew on the classical tradition in depicting David as a nude,standing with his weight on one leg, the other leg at rest ( see contrapposto). This pose suggests impending movement, and the entire sculpture shows tense waiting, as David sizes up his enemy and considers his course of action. While David reveals Michelangelo's expert knowledge of anatomy (he had been dissecting corpses for about...

• Michelangelo.

  (17 ft) tall, was carved from a block of stone that another sculptor had left unfinished. Michelangelo drew on the classical tradition in depicting David as a nude,standing with his weight on one leg, the other leg at rest ( see contrapposto). This pose suggests impending movement, and the entire sculpture shows tense waiting, as David sizes up his enemy and considers his course of action. While David reveals Michelangelo's expert knowledge of anatomy (he had been dissecting corpses for about...

• Geología - ciencias de la naturaleza.

  marcas dejadas por las garras de un oso gigante.F. Gohier/Photo Researchers, Inc. Los pueblos antiguos consideraban muchas características y procesos geológicos como obra de los dioses. Observaban el entorno natural con miedo y admiración, comoalgo peligroso y misterioso. Así, los antiguos sumerios, babilonios y otros pueblos, pese a realizar descubrimientos notables en matemáticas y astronomía, erraban en susinvestigaciones geológicas al personificar los procesos geológicos. Las leyendas irland...

• Gothic Art and Architecture I INTRODUCTION Notre Dame Cathedral, Paris Notre Dame Cathedral, in Paris, was begun in 1163 and completed for the most part in 1250.

  and by external arches, called flying buttresses. Consequently, the thick walls of Romanesque architecture could be largely replaced by thinner walls with glass windows,and the interiors could reach unprecedented heights. A revolution in building techniques thus occurred. With the Gothic vault, a ground plan could take on a variety of shapes. The general plan of the cathedrals, however, consisting of a long three-aisled nave interceptedby a transept and followed by a shorter choir and sanctuary,...

• Geología - ciencias de la naturaleza.

  marcas dejadas por las garras de un oso gigante.F. Gohier/Photo Researchers, Inc. Los pueblos antiguos consideraban muchas características y procesos geológicos como obra de los dioses. Observaban el entorno natural con miedo y admiración, comoalgo peligroso y misterioso. Así, los antiguos sumerios, babilonios y otros pueblos, pese a realizar descubrimientos notables en matemáticas y astronomía, erraban en susinvestigaciones geológicas al personificar los procesos geológicos. Las leyendas irland...

• 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...

• Roman Art and Architecture - History.

  Racecourses or circuses were also built in many cities for holding chariot races and horse races. Rome’s circus-shaped Piazza Navona occupies the site of one that wasbuilt during the reign ( AD 81-96) of the emperor Domitian. The largest circus in Rome, the Circus Maximus, held about 200,000 spectators. E Public Baths Large cities and small towns alike also had public baths ( thermae ); under the Republic they were generally made up of a suite of dressing rooms and bathing chambers with hot- ,...

• Evolución humana - ciencias de la naturaleza.

  Los cambios genéticos pueden mejorar la capacidad de los organismos para sobrevivir, reproducirse y, en animales, criar a su descendencia. Este proceso se denominaadaptación. Los progenitores transmiten mutaciones genéticas adaptativas a su descendencia y finalmente estos cambios se generalizan en una población —un grupo de organismos de la misma especie que comparten un hábitat local particular. Existen numerosos factores que pueden favorecer nuevas adaptaciones, pero los cambios delentorno d...

• Evolución humana - ciencias de la naturaleza.

  Los cambios genéticos pueden mejorar la capacidad de los organismos para sobrevivir, reproducirse y, en animales, criar a su descendencia. Este proceso se denominaadaptación. Los progenitores transmiten mutaciones genéticas adaptativas a su descendencia y finalmente estos cambios se generalizan en una población —un grupo de organismos de la misma especie que comparten un hábitat local particular. Existen numerosos factores que pueden favorecer nuevas adaptaciones, pero los cambios delentorno d...

• liste plantes bac pro

  Plantes d’intérieur à feuillage décoratif Acorus gramineus Aracées Acorus Adiantum raddianum Polypodiacées Capillaire, Chev eux de Vénus Aglaonema commutatum Aracées Aglaonema Alocasia X amazonica Aracées Alocasia Araucaria heterophylla Arancariacées Araucaria Areca lutescens Arecacées Areca Asparagus densiflorus ‘Meyerii’ Liliacée s Asparagus Asparagus densiflorus ‘Sprengeri’ Liliacées As paragus Asparagus...

• Ernest Hemingway I INTRODUCTION Ernest Hemingway Twentieth-century American author Ernest Hemingway wrote novels and stories that reflected his rich life experiences as a war correspondent, outdoor sportsman, and bullfight enthusiast.

  In his early work Hemingway used themes of helplessness and defeat, but in the late 1930s his writing began to reflect concerns about social problems. His novel To Have and Have Not (1937) and his play The Fifth Column, published in The Fifth Column and the First Forty-nine Stories (1938), strongly condemned economic and political injustice. Two of his best short stories, “The Short Happy Life of Francis Macomber” and “The Snows of Kilimanjaro,” were part of the story collection. In thecla...

• Arte románico - historia.

  marca el final del periodo románico. 2.2 Alemania o el Sacro Imperio Romano Germánico El estilo románico en Alemania evolucionó a partir de la arquitectura otónica. La relevancia tradicional del cuerpo occidental fue particularmente notable en los edificios quepresentan torres emparejadas, como en la primitiva catedral de Estrasburgo, del primer románico (iniciada en el 1015), donde se prefigura la disposición de las típicasfachadas góticas. Las iglesias románicas alemanas estuvieron proyectada...

• Arte griego.

  El estilo de la cerámica decorada se modificó aproximadamente en el siglo VII a.C., debido a la creciente colonización griega del Mediterráneo y al comercio con los feniciosy otros pueblos orientales. En las vasijas de este periodo, conocido como periodo oriental de la cerámica decorada, los diseños abstractos geométricos se reemplazaron porlos motivos de inspiración naturalista propios del arte oriental, como la flor de loto, la palmeta, los leones y las esfinges. La ornamentación aumentó en ca...

• Arte griego - historia.

  El estilo de la cerámica decorada se modificó aproximadamente en el siglo VII a.C., debido a la creciente colonización griega del Mediterráneo y al comercio con los feniciosy otros pueblos orientales. En las vasijas de este periodo, conocido como periodo oriental de la cerámica decorada, los diseños abstractos geométricos se reemplazaron porlos motivos de inspiración naturalista propios del arte oriental, como la flor de loto, la palmeta, los leones y las esfinges. La ornamentación aumentó en ca...

• Book I INTRODUCTION Kelmscott Chaucer The Kelmscott Chaucer was published in 1896 by William Morris' company, the Kelmscott Press.

  B Medieval European Books Illustration of Saint Mark in the Ebbo GospelsThis is a page from the illuminated manuscript known as the Ebbo Gospels (about 816-835). It depicts Saint Mark lookingheavenward for inspiration as he writes his gospel account, and is drawn in an expressive, energetic style typical ofmedieval art of that period. The full name of the Ebbo Gospels is the Gospel Book of Archbishop Ebbo of Reims. This pagemeasures about 25 by 20 cm (about 10 by 8 in).Bridgeman Art Library, Lo...

• Weather.

  hours, and the snow can be much deeper in places where the wind piles it up in drifts. Extraordinarily deep snows sometimes accumulate on the upwind side ofmountain slopes during severe winter storms or on the downwind shores of large lakes during outbreaks of polar air. VI WIND Wind is the horizontal movement of air. It is named for the direction from which it comes—for example, a north wind comes from the north. In most places near theground, the wind speed averages from 8 to 24 km/h (from 5...

• 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...

• Plate Tectonics.

  ridges. The Mid-Atlantic Ridge is an underwater mountain range created at a divergent plate boundary in the middle of the Atlantic Ocean. It is part of a worldwidesystem of ridges made by seafloor spreading. The Mid-Atlantic Ridge is currently spreading at a rate of 2.5 cm per year (1 in per year). The mid-ocean ridges today are60,000 km (about 40,000 mi) long, forming the largest continuous mountain chain on earth. Earthquakes, faults, underwater volcanic eruptions, and vents, oropenings, along...

• Inorganic Chemistry - chemistry.

  two electrically charged plates (positively charged top plate and negatively charged bottom plate). By measuring the difference in how fast these electron-laden oildrops fell when the metal plates were charged and uncharged, Millikan was able to calculate the total charge on each oil drop. Because each measurement was a wholenumber multiple of -1.60 × 10 -19 coulombs, Millikan concluded this was the charge carried by a single electron. Using Thomson’s electron charge-to-mass ratio, Millikan then...

• 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...

• Determinant.

• Matrix Theory and Linear Algebra I INTRODUCTION Matrix Theory and Linear Algebra, interconnected branches of mathematics that serve as fundamental tools in pure and applied mathematics and are becoming increasingly important in the physical, biological, and social sciences.

  vectors and V is called a vector space of dimension m. Two- and three-dimensional Euclidean spaces are vector spaces when their points are regarded as specified by ordered pairs or triples of real numbers. Matrices may be used to describe linear changes from one vector space into another. Contributed By:James Singer Reviewed By:J. Lennart BerggrenMicrosoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.

• Air - chemistry.

  lighting systems, fertilizers, and semiconductors (substances used to make the chips in computers, calculators, televisions, microwave ovens, and many other electronicdevices). A Oxygen More than half of the oxygen produced in the United States is used by the steel industry, which injects the gas into basic oxygen furnaces to heat and produce steel(see Iron and Steel Manufacture: Basic Oxygen Process ). Metalworkers also combine oxygen with acetylene to produce high-temperature torch flames th...

• Arte gótico.

  Catedral de SalisburyLa catedral de Salisbury es uno de los mejores ejemplos del gótico inglés. Se construyó entre 1220 y 1260, aunque la aguja sobre elcrucero y los arbotantes se añadieron en el siglo XIV.John Bethell/Bridgeman Art Library, London/New York Con la bóveda gótica los edificios pudieron adoptar formas variadas. Sin embargo, la planta común de las catedrales góticas consistió en tres o cinco naves longitudinales,un transepto, un coro y un presbiterio, es decir, una composición simil...

• Arte gótico - historia.

  Catedral de SalisburyLa catedral de Salisbury es uno de los mejores ejemplos del gótico inglés. Se construyó entre 1220 y 1260, aunque la aguja sobre elcrucero y los arbotantes se añadieron en el siglo XIV.John Bethell/Bridgeman Art Library, London/New York Con la bóveda gótica los edificios pudieron adoptar formas variadas. Sin embargo, la planta común de las catedrales góticas consistió en tres o cinco naves longitudinales,un transepto, un coro y un presbiterio, es decir, una composición simil...

• Los vertebrados - (exposé gratuit en espagnol).

• Los reptiles - (exposé gratuit en espagnol).

  Los reptiles, normalmente, depositan sus huevos en un nido excavado en la arena, en la tierra o sobre las hojas. Por lo general, losabandonan una vez puestos y no se ocupan de las crías cuando nacen. Sin embargo, las hembras de cocodrilo, y algunas veces tambiénlos machos, vigilan sus nidos. Si una de las crías tiene problemas para salir del cascarón, sus padres la ayudan metiéndose el huevo enla boca y rompiendo la cáscara con suavidad, sin dañar a la cría. Las pitones y las cobras también prot...