16 résultats pour "screen"

• Television.

  A charge-coupled device (CCD) can be much smaller than a camera tube and is much more durable. As a result, cameras with CCDs are more compact and portablethan those using a camera tube. The image they create is less vulnerable to distortion and is therefore clearer. In a CCD, the light from a scene strikes an array ofphotodiodes arranged on a silicon chip. Photodiodes are devices that conduct electricity when they are struck by light; they send this electricity to tiny capacitors. Thecapacitors...

• Electronic Games.

  arcade game of all time. With Pizza Time Theaters legitimizing the idea of arcades and hits such as Ms. Pac-Man , Asteroids , Donkey Kong , Tempest , Frogger , and Defender bringing new excitement to gaming, the coin-operated video game business boomed. In 1981 Americans spent 75,000 person-years and $5 billion playing video games at anestimated 4,300 arcades in the United States. Many popular arcade games also were translated for use on the Atari 2600 and its chief rivals in the homemarket—M...

• Puppets I INTRODUCTION Punch and Judy Punch and Judy are characters in an English hand puppet show that first appeared in 1662.

  Rod puppets are controlled by rods attached to their limbs, heads, and bodies. Although the traditional rod puppets of Belgium and Sicily are worked from above, likemarionettes, most contemporary rod figures are operated from below. In theaters, rod puppeteers are frequently concealed from view by drapery or stage flats (fabric stretched across frames). On television and in films, rod and hand puppeteers usually hold their figures either above their heads or in front of their faces. In the lat...

• Electronics.

  electronic circuits. The resistors are made from carbon mixtures, metal films, or resistance wire and have two connecting wires attached. Variable resistors, with anadjustable sliding contact arm, are often used to control volume on radios and television sets. E Capacitors Capacitors consist of two metal plates that are separated by an insulating material ( see Capacitor). If a battery is connected to both plates, an electric charge will flow for a short time and accumulate on each plate. If th...

• Rudolph Valentino Rudolph Valentino (1895-1926), Italian-born motion-picture actor, considered the archetypal screen lover, idolized by female fans of the 1920s.

• 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...

• Color I INTRODUCTION Color © Microsoft Corporation.

  The colors that absorb light of the additive primary colors are called subtractive primary colors. They are magenta (purplish-pink), which absorbs green; yellow, whichabsorbs blue; and cyan (light greenish-blue), which absorbs red. Thus, if a green light is thrown on a magenta pigment, the eye will perceive black. These subtractiveprimary colors are also called the pigment primaries. They can be mixed together in varying amounts to match almost any hue. If all three are mixed in about equalamoun...

•   HEAVY BOOTS HEAVIER BOOTS Twelve weekends later was the first performance of Hamlet, although it was actually an abbreviated modern version, because the real Hamlet is too long and confusing, and most of the kids in my class have ADD.

  HEAVIER BOOTS Twelve weekends laterwasthefirst performance of Hamlet, although itwas actually anabbreviated modernversion, because thereal Hamlet is too long andconfusing, andmost ofthe kids inmy class have ADD. Forexample, thefamous "To beornot tobe" speech, whichIknow about fromthe Collected Shakespeare set Grandma boughtme,was cutdown so that itwas just, "Tobeornot tobe, that's thequestion." Everyone hadtohave apart, butthere weren't enoughrealparts, andIdidn't gotothe auditions becausemyboot...

• Metropolitan Museum of Art.

  B Ancient Near Eastern Art The objects in this department range from a vast geographical area in southwest Asia and northeast Africa from around 5000 BC to around AD 600. Notable works include Assyrian reliefs from the palace of King Ashurnasirpal II at Calah (now Nimrud, Iraq), Sumerian sculpture, Anatolian ivories, Iranian bronzes, and Achaemenidand Sassanian works in silver and gold. C Arms and Armor This department is renowned for its collection of European armor from the Middle Ages (5t...

• World Wide Web.

  browser does not display the URL for the user. Instead, to indicate that an item is selectable, the browser changes the color of the item on the screen and keeps theURL associated with the link hidden. When a user clicks on an item that corresponds to a selectable link, the browser consults the hidden information to find theappropriate URL, which the browser then follows to the selected page. Because a link can point to any page in the Web, the links are known as hyperlinks. See also Hypermedia...

• Basketball.

  rebound. Play continues as the teams score and possession changes. A time-out, when the game is stopped for a certain amount of time, allows coaches to instructplayers or to develop a new game strategy. A Offense Playing offense is perhaps the most prominent part of playing basketball, as it allows players to demonstrate and improve upon individual skills necessary to beingsuccessful. Many of basketball's best players have exceptional talents on offense. Basic offensive skills are passing, ball...

• Reagan Ronald Wilson Homme d'Etat américain * 6.2.1911, Tampico, Illinois D'abord reporter, puis acteur (il préside le "Screen Actors Guild",...

  Reagan Ronald Wilson Homme d'Etat américain * 6.2.1911, Tampico, Illinois D'abord reporter, puis acteur (il préside le "Screen Actors Guild", syndicat des acteurs d'Hollywood, de 1947 à 1952 et en 1959), Reagan n'entre en politique qu'en 1962 au sein du parti républicain. Gouverneur de Californie de 1967 à 1974, il remporte en novembre 1980 les élections présidentielles et succède à Jimmy Carter (il sera réélu en 1984). D'orientation ultralibérale, sa politique conduit l'Etat à réduire considéra...

• 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)...

• Bowling.

  In each of the first nine frames the bowler rolls one or two balls. If the bowler knocks down all ten pins with the first ball, he or she has rolled a strike, the best roll possible. An X is recorded on the scoresheet or screen, and the bowler receives ten points (the number of pins knocked down) plus a bonus of the number of pins thebowler knocks down in his or her next two bowls. The maximum possible score in a strike frame, therefore, is 30: the strike followed by two more strikes on subseq...

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

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

• Midnighters