|
Hyperwave
An ansible is a category of fictional devices or technology capable of near-instantaneous or faster-than-light communication. It can send and receive messages to and from a corresponding device over any distance or obstacle whatsoever with no delay, even between star systems. As a name for such a device, the word "ansible" first appeared in a 1966 novel by Ursula K. Le Guin. Since that time, the term has been broadly used in the works of numerous science fiction authors, across a variety of settings and continuities. A related term is ultrawave. Coinage by Ursula Le Guin Ursula K. Le Guin neologism, coined the word "ansible" in her 1966 novel ''Rocannon's World''. The word was a contraction of "answerable", as the device would allow its users to receive answers to their messages in a reasonable amount of time, even over interstellar communication, interstellar distances. The plot device of the ansible was the basis for creating a specific kind of interstellar civilizationone w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faster-than-light Communication
Superluminal communication is a hypothetical process in which information is sent at faster-than-light (FTL) speeds. The current scientific consensus is that faster-than-light communication is not possible, and to date it has not been achieved in any experiment. Superluminal communication other than possibly through wormholes is likely impossible because, in a Lorentz-invariant theory, it could be used to transmit information into the past. This complicates causality, but no theoretical arguments conclusively preclude this possibility. A number of theories and phenomena related to superluminal communication have been proposed or studied, including tachyons, neutrinos, quantum nonlocality, wormholes, and quantum tunneling. Proposed mechanisms Tachyons Tachyonic particles are hypothetical particles that travel faster than light. These would allow superluminal communication, and for this reason are widely believed not to exist. By contrast, tachyonic fields quantum fields with ima ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Absolute Simultaneity
Absolute space and time is a concept in physics and philosophy about the properties of the universe. In physics, absolute space and time may be a preferred frame. Before Newton A version of the concept of absolute space (in the sense of a preferred frame) can be seen in Aristotelian physics. Robert S. Westman writes that a "whiff" of absolute space can be observed in Copernicus's ''De revolutionibus orbium coelestium'', where Copernicus uses the concept of an immobile sphere of stars. Newton Originally introduced by Sir Isaac Newton in ''Philosophiæ Naturalis Principia Mathematica'', the concepts of absolute time and space provided a theoretical foundation that facilitated Newtonian mechanics. According to Newton, absolute time and space respectively are independent aspects of objective reality:In ''Philosophiae Naturalis Principia Mathematica'' See the ''Principia'' on line aAndrew Motte Translation/ref> Absolute, true and mathematical time, of itself, and from its own nature f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advent Rising
''Advent Rising'' is an action-adventure third-person shooter video game developed by GlyphX Games and published by Majesco Entertainment. The game was released on May 31, 2005, for Xbox and on August 9, 2005, for Microsoft Windows. Its story was created by Donald and Geremy Mustard and featured a script written by science fiction writers Orson Scott Card and Cameron Dayton; the full orchestral soundtrack was done by Tommy Tallarico and Emmanuel Fratianni. As of September 14, 2006, Steam began offering ''Advent Rising'' for download. Much-hyped ''Advent Rising'' was the first in a planned trilogy which also saw the development of a game that would take place alongside ''Advent Rising'', called ''Advent Shadow'' for the PSP. Despite a large advertising campaign including promotion in cinemas, the game's retail performance fell far short of expectations. By the end of 2005, Majesco had completely revised its business plan to focus towards handheld games and canceled plans for fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quark Confinement
In quantum chromodynamics (QCD), color confinement, often simply called confinement, is the phenomenon that color-charged particles (such as quarks and gluons) cannot be isolated, and therefore cannot be directly observed in normal conditions below the Hagedorn temperature of approximately 2 terakelvin (corresponding to energies of approximately 130–140 MeV per particle). Quarks and gluons must clump together to form hadrons. The two main types of hadron are the mesons (one quark, one antiquark) and the baryons (three quarks). In addition, colorless glueballs formed only of gluons are also consistent with confinement, though difficult to identify experimentally. Quarks and gluons cannot be separated from their parent hadron without producing new hadrons. Origin There is not yet an analytic proof of color confinement in any non-abelian gauge theory. The phenomenon can be understood qualitatively by noting that the force-carrying gluons of QCD have color charge, unlike the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantum Entanglement
Quantum entanglement is the phenomenon that occurs when a group of particles are generated, interact, or share spatial proximity in a way such that the quantum state of each particle of the group cannot be described independently of the state of the others, including when the particles are separated by a large distance. The topic of quantum entanglement is at the heart of the disparity between classical and quantum physics: entanglement is a primary feature of quantum mechanics not present in classical mechanics. Measurements of physical properties such as position, momentum, spin, and polarization performed on entangled particles can, in some cases, be found to be perfectly correlated. For example, if a pair of entangled particles is generated such that their total spin is known to be zero, and one particle is found to have clockwise spin on a first axis, then the spin of the other particle, measured on the same axis, is found to be anticlockwise. However, this behavior gives ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pion
In particle physics, a pion (or a pi meson, denoted with the Greek letter pi: ) is any of three subatomic particles: , , and . Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions and decaying after a mean lifetime of 26.033 nanoseconds ( seconds), and the neutral pion decaying after a much shorter lifetime of 85 attoseconds ( seconds). Charged pions most often decay into muons and muon neutrinos, while neutral pions generally decay into gamma rays. The exchange of virtual pions, along with vector, rho and omega mesons, provides an explanation for the residual strong force between nucleons. Pions are not produced in radioactive decay, but commonly are in high-energy collisions between hadrons. Pions also result from some matter–antimatter annihilation events. All types of pions are also produced in natural processes wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quark
A quark () is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. All commonly observable matter is composed of up quarks, down quarks and electrons. Owing to a phenomenon known as ''color confinement'', quarks are never found in isolation; they can be found only within hadrons, which include baryons (such as protons and neutrons) and mesons, or in quark–gluon plasmas. There is also the theoretical possibility of more exotic phases of quark matter. For this reason, much of what is known about quarks has been drawn from observations of hadrons. Quarks have various intrinsic properties, including electric charge, mass, color charge, and spin. They are the only elementary particles in the Standard Model of particle physics to experience all four fundamental interactions, also known as ''fundamental forces'' (electro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ender's Game (series)
The ''Ender's Game'' series (often referred to as the ''Ender'' saga and also the Enderverse) is a series of science fiction books written by American author Orson Scott Card. The series started with the novelette ''Ender's Game'', which was later expanded into the novel of the same title. It currently consists of sixteen novels, thirteen short stories, 47 comic issues, an audioplay, and a film. The first two novels in the series, ''Ender's Game'' and ''Speaker for the Dead'', each won both the Hugo and Nebula Awards. The series is set in a future where mankind is facing annihilation by an aggressive alien society, an insect-like race known formally as " Formics", but more colloquially as "Buggers". The series protagonist, Andrew "Ender" Wiggin, is one of the child soldiers trained at Battle School (and eventually Command School) to be the future leaders for the protection of Earth. Enderverse Ender series Starting with ''Ender's Game'', five novels and one novella have been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ender's Game
''Ender's Game'' is a 1985 military science fiction novel by American author Orson Scott Card. Set at an unspecified date in Earth's future, the novel presents an imperiled humankind after two conflicts with an insectoid alien species they dub "the buggers". In preparation for an anticipated third invasion, Earth's international military force recruits young children, including the novel's protagonist, Andrew "Ender" Wiggin, to be trained as elite officers. The children learn military strategy and leadership by playing increasingly difficult war games, including some in zero gravity, where Ender's tactical genius is revealed. The book originated as a short story of the same name, published in the August 1977 issue of ''Analog Science Fiction and Fact''. The novel was published on January 15, 1985. Later, by elaborating on characters and plotlines depicted in the novel, Card wrote additional books in the ''Ender's Game'' series. Card released an updated version of ''Ender's G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orson Scott Card
Orson Scott Card (born August 24, 1951) is an American writer known best for his science fiction works. He is the first and (as of 2022) only person to win both a Hugo Award and a Nebula Award in consecutive years, winning both awards for both his novel ''Ender's Game'' (1985) and its sequel ''Speaker for the Dead'' (1986). A feature film adaptation of ''Ender's Game'', which Card co-produced, was released in 2013. Card also wrote the Locus Fantasy Award-winning series ''The Tales of Alvin Maker'' (1987–2003). Card's works were influenced by classic literature, popular fantasy, and science fiction; he often uses tropes from genre fiction. His background as a screenwriter has helped Card make his works accessible. Card's early fiction is original but contains graphic violence. His fiction often features characters with exceptional gifts who make difficult choices with high stakes. Card has also written political, religious, and social commentary in his columns and other writi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bandwidth (computing)
In computing, bandwidth is the maximum rate of data transfer across a given path. Bandwidth may be characterized as network bandwidth, data bandwidth, or digital bandwidth. This definition of ''bandwidth'' is in contrast to the field of signal processing, wireless communications, modem data transmission, digital communications, and electronics, in which ''bandwidth'' is used to refer to analog signal bandwidth measured in hertz, meaning the frequency range between lowest and highest attainable frequency while meeting a well-defined impairment level in signal power. The actual bit rate that can be achieved depends not only on the signal bandwidth but also on the noise on the channel. Network capacity The term ''bandwidth'' sometimes defines the net bit rate 'peak bit rate', 'information rate,' or physical layer 'useful bit rate', channel capacity, or the maximum throughput of a logical or physical communication path in a digital communication system. For example, bandwidth test ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
