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Butterfly Effect
In chaos theory, the butterfly effect is the sensitive dependence on initial conditions in which a small change in one state of a deterministic nonlinear system can result in large differences in a later state. The term is closely associated with the work of the mathematician and meteorologist Edward Norton Lorenz. He noted that the butterfly effect is derived from the example of the details of a tornado (the exact time of formation, the exact path taken) being influenced by minor perturbations such as a distant butterfly flapping its wings several weeks earlier. Lorenz originally used a seagull causing a storm but was persuaded to make it more poetic with the use of a butterfly and tornado by 1972. He discovered the effect when he observed runs of his weather model with initial condition data that were rounded in a seemingly inconsequential manner. He noted that the weather model would fail to reproduce the results of runs with the unrounded initial condition data. A very sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Pendulum Simultaneous Realisations
Double, The Double or Dubble may refer to: Mathematics and computing * Multiplication by 2 * Double precision, a floating-point representation of numbers that is typically 64 bits in length * A double number of the form x+yj, where j^2=+1 * A 2-tuple, or ordered list of two elements, commonly called an ordered pair, denoted (a,b) * Double (manifold), in topology Food and drink * A drink order of two shots of hard liquor in one glass * A "double decker", a hamburger with two patties in a single bun Games * Double, action in games whereby a competitor raises the stakes ** , in contract bridge ** Doubling cube, in backgammon ** Double, doubling a blackjack bet in a favorable situation ** Double, a bet offered by UK bookmakers which combines two selections * Double, villain in the video game ''Mega Man X4'' * A kart racing game '' Mario Kart: Double Dash'' * An arcade action game ''Double Dragon'' Sports * Double (association football), the act of a winning a division and primar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-body Problem
In physics, specifically classical mechanics, the three-body problem is to take the initial positions and velocities (or momenta) of three point masses orbiting each other in space and then calculate their subsequent trajectories using Newton's laws of motion and Newton's law of universal gravitation. Unlike the two-body problem, the three-body problem has no general closed-form solution, meaning there is no equation that always solves it. When three bodies orbit each other, the resulting dynamical system is chaotic for most initial conditions. Because there are no solvable equations for most three-body systems, the only way to predict the motions of the bodies is to estimate them using numerical methods. The three-body problem is a special case of the -body problem. Historically, the first specific three-body problem to receive extended study was the one involving the Earth, the Moon, and the Sun. In an extended modern sense, a three-body problem is any problem in cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polydamas Swallowtail (Battus Polydamas Polydamas)
''Battus polydamas'', also known as the gold rim swallowtail, the Polydamas swallowtail or the tailless swallowtail, is a species of butterfly in the family Papilionidae. The species was first described by Carl Linnaeus in his 10th edition of ''Systema Naturae'', published in 1758. Description The wingspan is without the tail. The top of the wings are black with a broad submarginal band formed by large yellow spots. The undersides of the forewings have the same pattern, while the hindwings have a submarginal row of red lunules. This butterfly flies from April to November in three generations in the north of its range, throughout the year in several generations in the tropics. The larvae feed on ''Aristolochia'' plant species. File:Battus polydamas - Flickr - Alex Popovkin, Bahia, Brazil.jpg, Mating File:Battus polydamas lucayus (Gold Rim Swallowtail, Tailless Swallowtail) larva.jpg, Larva File:Battus polydamas lucayus (Gold Rim Swallowtail, Tailless Swallowtail) larva - 1494658 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gull
Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed in the genus ''Larus'', but that arrangement is now considered polyphyletic, leading to the resurrection of several genera. An older name for gulls is mews; this still exists in certain regional English dialects and is cognate with German , Danish ', Swedish ', Dutch ', Norwegian ', and French '. Gulls are usually grey or white, often with black markings on the head or wings. They normally have harsh wailing or squawking calls, stout bills, and webbed feet. Most gulls are ground-nesting piscivores or carnivores which take live food or scavenge opportunistically, particularly the ''Larus'' species. Live food often includes crustaceans, molluscs, fish and small birds. Gulls have unhinging jaws that provide the flexibility to consume large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LGP-30
The LGP-30, standing for Librascope General Purpose and then Librascope General Precision, is an early off-the-shelf computer. It was manufactured by the Librascope company of Glendale, California (a division of General Precision Inc.), and sold and serviced by the Royal Precision Electronic Computer Company, a joint venture with the Royal McBee division of the Royal Typewriter Company. The LGP-30 was first manufactured in 1956, at a retail price of $47,000, . The LGP-30 was commonly referred to as a desk computer. Its height, width, and depth, excluding the typewriter shelf, was . It weighed about , and was mounted on sturdy casters which facilitated moving the unit. Design The primary design consultant for the Librascope computer was Stan Frankel, a Manhattan Project veteran and one of the first programmers of ENIAC, assisted by James Cass, at the time a graduate student at Caltech. They designed a usable computer with a minimal amount of hardware. The single addre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal McBee
Royal Consumer Information Products, Inc. (formerly The Royal Typewriter Company) is an American technology company founded in January 1904 as a manufacturer of typewriters. Royal’s product line has evolved to include cash registers, shredders, personal digital assistants (PDAs)/electronic organizers, postal scales, weather stations, and a wide range of original and compatible/remanufactured imaging supplies supporting printers, faxes, and copiers. The company is headquartered in Hartford, Connecticut. History The Royal Typewriter Company was founded by Edward B. Hess and Lewis C. Myers in January 1904 in a machine shop in Brooklyn, New York. The next year, Hess and Myers turned to Thomas Fortune Ryan, to whom they demonstrated a prototype typewriter. Their machine had numerous innovations including a friction-free, ball-bearing, one-track rail to support the weight of the carriage, a new paper feed, a lighter and faster typebar action, and complete visibility of the words as t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. It takes the form of an evacuated tubular envelope of glass or sometimes metal containing electrodes connected to external connection pins. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental Electronics, electronic functions such as signal amplifier, amplification and current Rectifier, rectification. Non-thermionic types such as vacuum phototubes achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light and measurement of its intensity. In both types the electrons are accelerated from the cathode to the anode by the electric field in the tube. The first, and simplest, vacuum tube, the diode or Flem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Phantom Tollbooth
''The Phantom Tollbooth'' is a children's fantasy adventure novel written by Norton Juster, with illustrations by Jules Feiffer, first published in 1961 in literature, 1961. The story follows a bored young boy named Milo who unexpectedly receives a magic tollbooth that transports him to the once prosperous, but now troubled, Kingdom of Wisdom. Along with a dog named Tock and the Humbug, Milo goes on a quest to the Castle in the Air seeking the kingdom's two exiled princesses, named Rhyme and Reason. As Milo learns valuable lessons, he finds a love of learning in a story full of puns and wordplay, such as exploring the literal meanings of idioms. In 1958, Juster had received a Ford Foundation grant for a children's book about cities. Unable to make progress on that project, he turned to writing what became ''The Phantom Tollbooth'', his first book. His housemate, Feiffer, a cartoonist, interested himself in the project. Jason Epstein, an editor at Random House, bought the book a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Philadelphia Inquirer
''The Philadelphia Inquirer'', often referred to simply as ''The Inquirer'', is a daily newspaper headquartered in Philadelphia, Pennsylvania. Founded on June 1, 1829, ''The Philadelphia Inquirer'' is the third-longest continuously operating daily newspaper in the United States. The newspaper has the largest circulation of any newspaper in both Pennsylvania and the Delaware Valley metropolitan region, which includes Philadelphia and its surrounding communities in southeastern Pennsylvania, South Jersey, northern Delaware, and the northern Eastern Shore of Maryland. As of 2020, the newspaper has the 17th-largest circulation of any newspaper in the United States As of 2020, ''The Inquirer'' has won 20 Pulitzer Prizes. Several decades after its 1829 founding, ''The Inquirer'' began emerging as one of the nation's major newspapers during the American Civil War. Its circulation dropped after the Civil War's conclusion, but it rose again by the end of the 19th century. Originally sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray Bradbury
Ray Douglas Bradbury ( ; August 22, 1920June 5, 2012) was an American author and screenwriter. One of the most celebrated 20th-century American writers, he worked in a variety of genres, including fantasy, science fiction, Horror fiction, horror, mystery fiction, mystery, and Literary fiction, realistic fiction. Bradbury is best known for his novel ''Fahrenheit 451'' (1953) and his short-story collections ''The Martian Chronicles'' (1950), ''The Illustrated Man'' (1951), and ''The October Country'' (1955). Other notable works include the coming of age novel ''Dandelion Wine'' (1957), the dark fantasy ''Something Wicked This Way Comes (novel), Something Wicked This Way Comes'' (1962) and the fictionalized memoir ''Green Shadows, White Whale'' (1992). He also wrote and consulted on screenplays and television scripts, including ''Moby Dick (1956 film), Moby Dick'' and ''It Came from Outer Space''. Many of his works were adapted into television and film productions as well as comic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Sound Of Thunder
"A Sound of Thunder" is a science fiction short story by American writer Ray Bradbury, first published in ''Collier's'' magazine on June 28, 1952, and later in Bradbury's 1953 collection '' The Golden Apples of the Sun''. Plot summary In the year 2055, time travel is a practical reality, and the company Time Safari Inc. offers wealthy adventurers the chance to travel back in time to hunt extinct species such as dinosaurs. A hunter named Eckels pays $10,000 to join a hunting party that will travel back 65 million years to the Late Cretaceous period, on a guided safari to kill a ''Tyrannosaurus rex''. As the party waits to depart, they discuss the recent presidential elections in which a candidate, Deutscher, has been defeated by his opponent Keith, to the relief of many concerned. When the party arrives in the past, Travis, the hunting guide, and his assistant warn Eckels and the two other hunters about the necessity of minimizing the events they change before they go back, sinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ripple Effect
A ripple effect occurs when an initial disturbance to a system propagates outward to disturb an increasingly larger portion of the system, like ripples expanding across the water when an object is dropped into it. The ripple effect is often used colloquially to mean a multiplier in macroeconomics. For example, an individual's reduction in spending reduces the incomes of others and their ability to spend. In a broader global context, research has shown how monetary policy decisions, especially by major economies like the US, can create ripple effects impacting economies worldwide, emphasizing the interconnectedness of today's global economy. In sociology, the ripple effect can be observed in how social interactions can affect situations not directly related to the initial interaction, and in charitable activities where information can be disseminated and passed from the community to broaden its impact. The concept has been applied in computer science within the field of softw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
