searching for Entropy (astrophysics) 47 found (3490 total)

alternate case: entropy (astrophysics)

Standard molar entropy
(433 words)
[view diff]
no match in snippet
view article
find links to article

In chemistry, the standard molar entropy is the entropy content of one mole of substance, under standard conditions (not standard temperature and pressureEntropy encoding (317 words) [view diff] no match in snippet view article find links to article

In information theory an entropy encoding is a lossless data compression scheme that is independent of the specific characteristics of the medium. OneEntropy (information theory) (6,386 words) [view diff] no match in snippet view article find links to article

In information theory, entropy (more specifically, Shannon entropy) is the expected value (average) of the information contained in each message receivedEntropy (10,175 words) [view diff] no match in snippet view article find links to article

This article is about entropy in thermodynamics. For other uses, see Entropy (disambiguation). For a more accessible and less technical introductionMeasure-preserving dynamical system (866 words) [view diff] no match in snippet view article find links to article

the measure-theoretic entropy of a dynamical system. The entropy of a partition Q is defined as The measure-theoretic entropy of a dynamical systemFree entropy (432 words) [view diff] no match in snippet view article find links to article

A thermodynamic free entropy is an entropic thermodynamic potential analogous to the free energy. Also known as a Massieu, Planck, or Massieu–Planck potentialsEntropy of vaporization (168 words) [view diff] no match in snippet view article find links to article

to be confused with Enthalpy of vaporization. The entropy of vaporization is the increase in entropy upon vaporization of a liquid. This is always positiveEntropy of fusion (237 words) [view diff] no match in snippet view article find links to article

The entropy of fusion is the increase in entropy when melting a substance. This is almost always positive since the degree of disorder increases in theNegentropy (1,095 words) [view diff] no match in snippet view article find links to article

also negative entropy, syntropy, extropy, ectropy or entaxy, of a living system is the entropy that it exports to keep its own entropy low; it lies atOrders of magnitude (entropy) (121 words) [view diff] no match in snippet view article find links to article

magnitude of entropy. Orders of magnitude (data) Order of magnitude (terminology) Jean-Bernard Brissaud (14 February 2005). "The Meaning of Entropy" (PDF)Principle of maximum entropy (2,741 words) [view diff] no match in snippet view article find links to article

learning, see maximum entropy classifier. For other uses, see maximum entropy (disambiguation). The principle of maximum entropy states that, subjectEntropy monitoring (440 words) [view diff] no match in snippet view article find links to article

Entropy monitoring is a method of assessing anaesthetic depth. It was commercially developed by Datex-Ohmeda, now part of GE Healthcare. It relies onThe Entropy Tango (66 words) [view diff] no match in snippet view article find links to article

The Entropy Tango is a novel by British fantasy and science fiction writer Michael Moorcock. It is part of his long running Jerry Cornelius series.Boltzmann's entropy formula (948 words) [view diff] no match in snippet view article find links to article

mechanics, Boltzmann's equation is a probability equation relating the entropy S of an ideal gas to the quantity W, which is the number of microstatesThe Entropy Plague (111 words) [view diff] no match in snippet view article find links to article

The Entropy Plague is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. It concludesMaximum entropy probability distribution (1,827 words) [view diff] no match in snippet view article find links to article

statistics and information theory, a maximum entropy probability distribution is a probability distribution whose entropy is at least as great as that of all otherDifferential entropy (1,363 words) [view diff] no match in snippet view article find links to article

Differential entropy (also referred to as continuous entropy) is a concept in information theory that extends the idea of (Shannon) entropy, a measure ofRényi entropy (1,504 words) [view diff] no match in snippet view article find links to article

theory, the Rényi entropy generalizes the Hartley entropy, the Shannon entropy, the collision entropy and the min-entropy. Entropies quantify the diversityNonextensive entropy (90 words) [view diff] no match in snippet view article find links to article

has proposed a nonextensive entropy (Tsallis entropy), which is a generalization of the traditional Boltzmann–Gibbs entropy. The rationale behind the theoryJoint entropy (178 words) [view diff] no match in snippet view article find links to article

information theory, joint entropy is a measure of the uncertainty associated with a set of variables. The joint Shannon entropy of two variables andEntropy (statistical thermodynamics) (2,293 words) [view diff] no match in snippet view article find links to article

mechanics, the entropy function earlier introduced by Clausius is interpreted as statistical entropy using probability theory. The statistical entropy perspectiveConditional quantum entropy (352 words) [view diff] no match in snippet view article find links to article

conditional quantum entropy is an entropy measure used in quantum information theory. It is a generalization of the conditional entropy of classical informationConformational entropy (458 words) [view diff] no match in snippet view article find links to article

Not to be confused with configurational entropy. Conformational entropy is the entropy associated with the number of conformations of a molecule. The conceptVon Neumann entropy (1,867 words) [view diff] no match in snippet view article find links to article

statistical mechanics, the von Neumann entropy, named after John von Neumann, is the extension of classical Gibbs entropy concepts to the field of quantum mechanicsConditional entropy (343 words) [view diff] no match in snippet view article find links to article

In information theory, the conditional entropy (or equivocation) quantifies the amount of information needed to describe the outcome of a random variableBinary entropy function (394 words) [view diff] no match in snippet view article find links to article

In information theory, the binary entropy function, denoted or , is defined as the entropy of a Bernoulli process with probability of success p. MathematicallyIntroduction to entropy (2,989 words) [view diff] no match in snippet view article find links to article

the main encyclopedia article, see Entropy. The idea of "irreversibility" is central to the understanding of entropy. Everyone has an intuitive understandingCross entropy (784 words) [view diff] no match in snippet view article find links to article

In information theory, the cross entropy between two probability distributions over the same underlying set of events measures the average number of bitsEntropy (Buffy the Vampire Slayer) (1,601 words) [view diff] no match in snippet view article find links to article

"Entropy" is the 18th episode of season 6 of the television series Buffy the Vampire Slayer. The Trio, riding ATVs, pursue two vampires through a cemetery;Configuration entropy (383 words) [view diff] no match in snippet view article find links to article

In statistical mechanics, configuration entropy is the portion of a system's entropy that is related to the position of its constituent particles ratherEntropy (energy dispersal) (2,354 words) [view diff] no match in snippet view article find links to article

The description of entropy as energy dispersal provides an introductory method of teaching the thermodynamic concept of entropy. In physics and physicalEntropy rate (242 words) [view diff] no match in snippet view article find links to article

In the mathematical theory of probability, the entropy rate or source information rate of a stochastic process is, informally, the time density of theQ-exponential distribution (362 words) [view diff] no match in snippet view article find links to article

probability distribution arising from the maximization of the Tsallis entropy under appropriate constraints, including constraining the domain to beMaximum entropy spectral estimation (385 words) [view diff] no match in snippet view article find links to article

Maximum entropy spectral estimation is a method of spectral density estimation. The goal is to improve the spectral quality based on the principle ofEntropy (comics) (373 words) [view diff] no match in snippet view article find links to article

Entropy is a Cosmic Entity in the Marvel Comics Universe who possesses Nigh-Omnipotence. A representation of Eternity formed at the beginning of timeEntropy and life (3,215 words) [view diff] no match in snippet view article find links to article

Research concerning the relationship between the thermodynamic quantity entropy and the evolution of life began around the turn of the 20th century. InTemperature–entropy diagram (134 words) [view diff] no match in snippet view article find links to article

diagram. A temperature entropy diagram, or T-s diagram, is used in thermodynamics to visualize changes to temperature and specific entropy during a thermodynamicInformation theory (4,681 words) [view diff] no match in snippet view article find links to article

information is entropy, which is usually expressed by the average number of bits needed to store or communicate one symbol in a message. Entropy quantifiesEntropy (film) (47 words) [view diff] no match in snippet view article find links to article

Entropy is a 1999 film directed by Phil Joanou, starring Stephen Dorff and featuring the Irish rock band U2. The film is largely autobiographical, coveringJoint quantum entropy (575 words) [view diff] no match in snippet view article find links to article

The joint quantum entropy generalizes the classical joint entropy to the context of quantum information theory. Intuitively, given two quantum statesEntropy (arrow of time) (4,829 words) [view diff] no match in snippet view article find links to article

Entropy is the only quantity in the physical sciences (apart from certain rare interactions in particle physics; see below) that requires a particularCross-entropy method (704 words) [view diff] no match in snippet view article find links to article

The cross-entropy (CE) method attributed to Reuven Rubinstein is a general Monte Carlo approach to combinatorial and continuous multi-extremal optimizationTopological entropy (1,063 words) [view diff] no match in snippet view article find links to article

article is about entropy in geometry and topology. For other uses, see Entropy (disambiguation). In mathematics, the topological entropy of a topologicalSoftware entropy (260 words) [view diff] no match in snippet view article find links to article

be confused with information entropy. A work on software engineering by Ivar Jacobson et al. describes software entropy as follows: The second law ofHistory of entropy (2,297 words) [view diff] no match in snippet view article find links to article

The concept of entropy developed in response to the observation that a certain amount of functional energy released from combustion reactions is alwaysBlack hole thermodynamics (1,846 words) [view diff] no match in snippet view article find links to article

(its) entropy as it falls in, giving a decrease in entropy. Generalized second law introduced as total entropy = black hole entropy + outside entropy. ExtremalEntropy / Send Them (867 words) [view diff] no match in snippet view article find links to article

'"Send Them/Entropy (Hip Hop Reconstruction from the Ground Up)"', is a double A side EP by Asia Born (now known as Lyrics Born) and DJ Shadow and the