85 résultats pour "dark"

• Dark Matter - astronomy.

  observed, and the measured frequency of such events has placed limits on how much dark matter can take the form of MACHOs. From the observations that have beenmade by astronomers, it is now known that MACHOs cannot be the dominant constituent of dark matter. There are simply not enough such gravitational lenses. Physicists suspect that a more exotic form of cold dark matter must exist. This form is not baryonic. Like neutrinos, this form barely interacts with ordinary matter, butis some type of...

• Dark Side of the Moon [Pink Floyd] - analyse de l'oeuvre musicale.

• DARK CRYSTAL

• DARK STAR

• Stanley Kubrick Stanley Kubrick (1928-1999), American motion-picture director, many of whose films explore the dark side of human nature.

• Big Bang Theory - astronomy.

  hydrogen atoms. Hydrogen atoms can only absorb and emit specific colors, or wavelengths, of light. The formation of atoms allowed many other wavelengths of light,wavelengths that had been interfering with the free electrons prior to the cooling of the universe, to travel much farther than before. This change set free radiation thatwe can detect today. After billions of years of cooling, this cosmic background radiation is at about 3 K (-270°C/-454°F).The cosmic background radiation was first d...

• Exposé sur le dark web

  L’éthique numérique : Le Dark Web Mael / Nathan / Ruben / Youvène Introduction : Origine du Dark Web : Depuis 40 ans, internet devient de plus en plus omniprésent dans nos vies. C’est un outil devenu banal tellement il est utilisé en permanence au point même où l’on oublie à quel point il change nos quotidiens : pour lire l’heure, pour écouter de la musique, se repérer ou encore connaître l’horaire de son train. Seulement, tous ces services gratuits qu’on utilise peuvent se transformer et...

• Star (astronomy) - astronomy.

  absorbing the missing colors of light. For example, the set of dark lines made by hydrogen includes a dark red line, the set of dark lines made by sodium includes a pairof dark yellow lines, and the set of dark lines made by iron includes lines of nearly every color. Each element in the gaseous outer layer of a star produces its ownparticular pattern of dark spectrum lines, depending on the temperature and pressure of the gas. Astronomers have observed spectrum lines, or spectra, for hundredsof...

• Neptune (planet) - astronomy.

  The gaseous atmosphere of Neptune contains hydrogen, helium, and about 3 percent methane. It extends about 5,000 km (about 3,000 mi) above the planet’s ocean.Light reflected from Neptune’s deep atmosphere is blue, because the atmospheric methane absorbs red and orange light but scatters blue light. In 1998 astronomersalso identified molecules of methyl in Neptune’s atmosphere. Methyl molecules each contain one carbon atom and three hydrogen atoms. Methyl molecules are knownas hydrocarbon radical...

• Ancient Greece.

  The first culture of Aegean civilization on the Greek mainland is named Mycenaean for the palace at Mycenae on the Pelopónnisos. Scholars call the Mycenaeans the“earliest Greeks” because they are the first people known to have spoken Greek. Mycenaean culture developed later than Minoan. The ancestors of the Mycenaean people wandered onto the mainland from the north and the east from about 4000 to2000 BC, mixing with the people already there, and by about 1400 BC the Mycenaeans had become very...

• Ancient Greece .

  The first culture of Aegean civilization on the Greek mainland is named Mycenaean for the palace at Mycenae on the Pelopónnisos. Scholars call the Mycenaeans the“earliest Greeks” because they are the first people known to have spoken Greek. Mycenaean culture developed later than Minoan. The ancestors of the Mycenaean people wandered onto the mainland from the north and the east from about 4000 to2000 BC, mixing with the people already there, and by about 1400 BC the Mycenaeans had become very...

• Ancient Greece - USA History.

  The first culture of Aegean civilization on the Greek mainland is named Mycenaean for the palace at Mycenae on the Pelopónnisos. Scholars call the Mycenaeans the“earliest Greeks” because they are the first people known to have spoken Greek. Mycenaean culture developed later than Minoan. The ancestors of the Mycenaean people wandered onto the mainland from the north and the east from about 4000 to2000 BC, mixing with the people already there, and by about 1400 BC the Mycenaeans had become very...

• 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...

• 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...

• THE OLD DARK HOUSE

• 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...

• Interstellar Matter - astronomy.

  silhouette of a cloud of dust. At other times, it blocks only a percentage of the light from behind it, a process known by astronomers as extinction . The long, narrow dark lanes in the Milky Way as seen from Earth are examples of extinction. The amount of extinction is different for different wavelengths of light. A2 Reddening Starlight that does not get completely absorbed by interstellar dust can still be changed by the dust’s effects. As light passes through less dense patches of interstel...

• DARK CRISTAL de JIM HENSON ET FRANK OZ

• Ecrire une nouvelle fantastique : « Les âmes de Dark Place »

  Son expérience passée lui permet de forcer la porte et lorsqu’elle entre, une pression s’abat d’un coup sur ses épaules et la cloue au sol. Elle sent comme une présence autour d’elle mais plongée dans l’obscurité elle ne distingue rien. Alors qu’elle se redresse ,la sensation oppressant sa poitrine se fait plus intense et elle agrippe avec force son pendentif porte- bonheur, un talisman offert par sa famille pour se protéger. « Mais qu’est ce qui me prend, pense- t-elle, c’est bien ce que je che...

• Dancer In The Dark de Lars Von Trier

  même scène. On offre donc au spectateur des séquences musicales très hachées, très denses aussi ce qui fait la richesse de cette mise en scène. Bibliographie: Dancer in the Dark: -VON TRIER Lars, Dancer in the Dark, éditions Petite bibliothèque des cahiers du cinéma, Paris, 2000, 192p -VON TRIER Lars, Dancer in the Dark, Danemark, 2000, 2h19min, couleurs Articles: -MORICE Jacques, critique de Dancer in the Dark, Télérama, 21 octobre 2000 -ROY Jean, critique de Dancer in the Dark, L’Humanité, 18...

• Race - biology.

  distributed as a cline, generally varying along a north-south line. Skin color is lightest in northern Europeans, especially in those who live around the Baltic Sea, andbecomes gradually darker as one moves toward southern Europe, the Mediterranean, the Middle East, and into northern Africa and northern subtropical Africa. Skin isdarkest in people who live in the tropical regions of Africa. The lack of clear-cut discontinuities makes any racial boundary based on skin color totally arbitrary. Sim...

• Moon - astronomy.

  B Volcanic Features Maria, domes, rilles, and a few craters display indisputable characteristics of volcanic origin. Maria are plains of dark-colored rock that cover approximately 40 percent ofthe Moon's visible hemisphere. The maria formed when molten rock erupted onto the surface and solidified between 3.16 billion and 3.96 billion years ago. This rockresembles terrestrial basalt, a volcanic rock type widely distributed on Earth, but the rock that formed the maria has a higher iron content an...

• Excerpt from A Christmas Carol - anthology.

  External heat and cold had little influence on Scrooge. No warmth could warm, no wintry weather chill him. No wind that blew was bitterer than he, no falling snowwas more intent upon its purpose, no pelting rain less open to entreaty. Foul weather didn’t know where to have him. The heaviest rain, and snow, and hail, and sleet,could boast of the advantage over him in only one respect. They often “came down” handsomely and Scrooge never did. Nobody ever stopped him in the street to say, with g...

• Alberta - Geography.

  C Climate Except for the mountain areas, summers throughout the province are quite warm. Winters are long and extremely cold. In July, average daily temperatures range fromabout 16°C (about 60°F) along the northern boundary to about 21°C (about 70°F) in the south. In the extreme southeastern section of the province, temperatures of43°C (110°F) have been recorded. In January, average daily temperatures range from about -14°C (about 6°F) at Grande Prairie to about -9°C (about 16°F) atCalgary. Tem...

• Alberta - Canadian History.

  C Climate Except for the mountain areas, summers throughout the province are quite warm. Winters are long and extremely cold. In July, average daily temperatures range fromabout 16°C (about 60°F) along the northern boundary to about 21°C (about 70°F) in the south. In the extreme southeastern section of the province, temperatures of43°C (110°F) have been recorded. In January, average daily temperatures range from about -14°C (about 6°F) at Grande Prairie to about -9°C (about 16°F) atCalgary. Tem...

• Bats. It is nearly dark. From out of a cave, a

• roman noir américain - littérature.

  Dans Tous des voleurs (Thieves Like Us, 1937), Edward Anderson dénonce, à travers le récit d’une fulgurante histoire d’amour entre deux jeunes hors-la-loi, le néofascisme qui prospère sur le terreau de la dépression économique. Gerald Kersh décrit le calvaire d’un petit voyou sans envergure avec les Forbans de la nuit (Night and the City, 1938). David Goodis écrit à vingt et un ans un roman sur le mal de vivre d’une jeunesse américaine antiraciste et antifasciste, Retour à la vie (Retr...

• Saturn - astronomy.

  measurements of the magnetic field made by the Voyager space probes in the 1980s. Additional Cassini findings reported in March 2007 suggested that particles originating from geysers on the moon Enceladus may provide a partial explanation for thechange. The neutral gas particles become electrically charged and are captured by Saturn’s magnetic field, forming a disk of hot, ionized gas around the planet’sequator. The charged particles interact with the magnetic field and slow down the rotation of...

• Jupiter (planet) - astronomy.

  Beneath the supercritical fluid zone, the pressure reaches 3 million Earth atmospheres. At this depth, the atoms collide so frequently and violently that the hydrogenatoms are ionized—that is, the negatively charged electrons are stripped away from the positively charged protons of the hydrogen nuclei. This ionization results in asea of electrically charged particles that resembles a liquid metal and gives rise to Jupiter’s magnetic field. This liquid metallic hydrogen zone is 30,000 to 40,000 k...

• Star Wars :

  twins and dies on board Bail Organa's ship. The twins are a boy, Luke, and a girl, Leia. Later, Luke learn by Darth Vader that he is his father. At the end, the dark lord attempted to kill Luke with Force lightning, a sight that moves Vader to turn and kill his master, suffering mortal wounds in the process. Redeemed, Anakin Skywalker dies in his son's arms.  

• Paul Cézanne I INTRODUCTION Peaches and Pears Peaches and Pears (1888) by Paul Cézanne displays a sense of unity and continuity typical of the artist's many still-life paintings.

  the most transient natural effects as well as their own passing emotional states as the artists stood before nature. Under Pissarro's tutelage, and within a very shorttime during 1872-1873, Cézanne shifted from dark tones to bright hues and began to concentrate on scenes of farmland and rural villages. IV RETURN TO AIX-EN-PROVENCE Mont Sainte-Victoire by CézanneFrench artist Paul Cézanne painted Mont Sainte-Victoire, a mountain near his home in Provence in southern France, onmany occasions. Ov...

• Pablo Picasso.

  Color juxtapositions—between blue and orange, for instance—are intentionally strident and unharmonious. The representation of space is fragmented and discontinuous. While the left side of the canvas is largely Iberian-influenced, the right side is inspired by African masks, especially in its striped patterns and oval forms. Suchborrowings, which led to great simplification, distortion, and visual incongruities, were considered extremely daring in 1907. The head of the figure at the bottom right,...

• South Dakota - geography.

  C1 Temperatures Average January temperatures are everywhere less than -4° C (24° F) and decrease to less than -12° C (10° F) in some northern sections. The January temperaturesin Sioux Falls range from -16° to -4° C (3° to 24° F). Nightime lows of -29° C (-20° F) occur during most winters. July averages are in the low and middle 20°s C (lowand middle 70°s F) throughout most of the state, and are somewhat lower in the Black Hills. The average temperature range in Sioux Falls in July is 17° to 30...

• South Dakota - USA History.

  C1 Temperatures Average January temperatures are everywhere less than -4° C (24° F) and decrease to less than -12° C (10° F) in some northern sections. The January temperaturesin Sioux Falls range from -16° to -4° C (3° to 24° F). Nightime lows of -29° C (-20° F) occur during most winters. July averages are in the low and middle 20°s C (lowand middle 70°s F) throughout most of the state, and are somewhat lower in the Black Hills. The average temperature range in Sioux Falls in July is 17° to 30...

• The Souls of Black Folk by W.

  in amused contempt and pity. One ever feels his two-ness,—an American, a Negro; two souls, two thoughts, two unreconciled strivings; two warring ideals in onedark body, whose dogged strength alone keeps it from being torn asunder. The history of the American Negro is the history of this strife—this longing to attain self-conscious manhood, to merge his double self into a better and truer self. Inthis merging he wishes neither of the older selves to be lost. He would not Africanize America, f...

• Light - astronomy.

  Each different frequency or wavelength of visible light causes our eye to see a slightly different color. The longest wavelength we can see is deep red at about 700 nm.The shortest wavelength humans can detect is deep blue or violet at about 400 nm. Most light sources do not radiate monochromatic light. What we call white light,such as light from the Sun, is a mixture of all the colors in the visible spectrum, with some represented more strongly than others. Human eyes respond best to greenlight...

• William Shakespeare I INTRODUCTION William Shakespeare English playwright and poet William Shakespeare, who lived in the late 1500s and early 1600s, is regarded as the greatest dramatist in the history of English literature.

  Avon, Warwickshire, a prosperous town in the English Midlands. Based on this record and on the fact that children in Shakespeare’s time were usually baptized two orthree days after birth, April 23 has traditionally been accepted as his date of birth. The third of eight children, William Shakespeare was the eldest son of John Shakespeare, a locally prominent glovemaker and wool merchant, and Mary Arden, thedaughter of a well-to-do landowner in the nearby village of Wilmcote. The young Shakespeare...

• Vitamin.

  Vitamin B 1, or thiamine, promotes the metabolism of carbohydrates, enabling these nutrients to release their energy. Thiamine also plays a role in the functioning of the nervous system, muscles, and heart. The body does not store thiamine and people who are malnourished may develop thiamine deficiency. Mild thiamine deficiency cancause fatigue, muscle weakness, and loss of appetite. Severe thiamine deficiency causes beriberi, a disease characterized by muscle weakness, swelling of the heart,and...

• Baroque Art and ArchitectureIINTRODUCTIONGerman Baroque ArchitectureThe baroque style of architecture flourished in Germany in the 18th century.

  C Early baroque styles Conversion of Saint PaulItalian baroque painter Caravaggio painted scenes of realism and drama, often selecting lofty, religious themes anddepicting them with lower-class characters and settings with dramatic spotlighting. With its unidealized characters andfocus on the horse’s body, his Conversion of Saint Paul seems to record a stable accident, not a miraculous conversion byGod. This work was painted in 1601 and is in the Cerasi Chapel, Santa Maria del Popolo, Rome, It...

• Ellroy, James - écrivain.

  4 UN ÉCRIVAIN HORS NORMES James Ellroy est aujourd’hui l’un des auteurs de romans noirs américains les plus populaires. Il a réussi à canaliser ses pulsions les plus sombres pour les transcender dans le roman noir. Son style cru et acide dépeint les recoins sombres de la société américaine. Il s’intéresse particulièrement aux structures et au fonctionnement de l’État ainsi qu’à ses pratiques policières. Ses romans revêtent une dimension historique, notamment ceux de la trilogie Underworld U.S....

• 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...

• 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...

• Ludwig van Beethoven I INTRODUCTION Ludwig van Beethoven Ludwig van Beethoven is considered possibly the greatest Western composer of all time.

  the other hand, breaks up the opening theme into contrasting segments in different tempi, whereas customary practice called for stating the theme in its entirety at thebeginning of a movement. In the first movement of the Eroica Symphony, one of the major works from Beethoven’s middle period, he again sought ways to expand upon the prevailing musical forms. At that time, composers usually organized movements in three major parts. First, the exposition introduces the musical themes of the pie...

• Perception (psychology).

  A4 Closure According to the law of closure, we prefer complete forms to incomplete forms. Thus, in the drawing below, we mentally close the gaps and perceive a picture of a duck. This tendency allows us to perceive whole objects from incomplete and imperfect forms. A5 Common Fate The law of common fate leads us to group together objects that move in the same direction. In the following illustration, imagine that three of the balls are moving in one direction, and two of the balls are mo...

• Rhinoceros - biology.

  Male and female rhinos have a similar physical appearance, although male rhinos are usually larger than females, with the size difference varying between species. Inthe wild, some rhinos probably live into their late 40s, and they have survived into their 30s in captivity. IV TYPES OF RHINOCEROSES Until recently, mammalogists divided the rhinoceros family into three subfamilies, each with different characteristics. Scientists now believe that living rhinos belong to asingle subfamily, although...

• Extrasolar Planets - astronomy.

  When a planet passes in a front of the star it orbits—an event called a transit—it causes a small dip in the brightness of the star. Measuring the slight change in thebrightness can be used not only to directly detect a planet, but to determine its size and orbit. However, the planet needs to orbit in a plane that lies in a telescope’sline of sight on the star. Despite long odds, Earth-based telescopes have detected and studied a few exoplanets using this method. The first space telescope design...

• Astrobiology - astronomy.

  water to help reactions along. American chemists Stanley Miller and Harold Urey tested part of Oparin and Haldane’s hypothesis in the early 1950s by simulating conditions of the early Earth. In whathas become known as the Miller-Urey experiment, the two scientists connected two flasks with a loop of glass tubing that allowed the gases to pass between the flasks.They filled the upper flask with methane, ammonia, and hydrogen—components thought to have been in the early atmosphere. They filled the...

• Telescope - astronomy.

  Observatory). In some telescopes designed in the 1990s, the mirror’s weight has been dramatically reduced by sandwiching a honeycomb pattern of glass ribs between a thin, butrigid, concave mirror and a flat back plate. Engineers have even developed meniscus mirrors—mirrors that are too thin to support their own weight. An adjustableframework supports the meniscus mirror, and servomechanical actuators, controlled by computer, continually adjust the shape of the mirror as it tracks celestial tar...

• Skin. I INTRODUCTION Skin, outer body covering of an animal. The term skin

  III SKIN APPENDAGES In humans, the skin appendages, or structures embedded in the skin, include hair, nails, and several types of glands. Glands are groups of cells that produce andsecrete substances needed by other parts of the body. In other vertebrates, the skin appendages include scales (in fish and reptiles) and feathers (in birds). Together,the skin and the skin appendages are known as the integumentary system of the body. A Hair Hair is a distinguishing characteristic of mammals, a gro...

• Arctic - Geography.

  The Arctic is not a frozen desert devoid of life on land or sea, even during the cold, dark winter months. Spring brings a phenomenal resurgence of plant and animal life.Low temperatures are not always the critical element—moisture, the type of soil, and available solar energy are also extremely important. Some animals adapt well toArctic conditions; for instance, a number of species of mammals and birds carry additional insulation, such as fat, in cold months. Arctic summers with extended dayli...