• In his book, Schrödinger originally stated that life feeds on negative entropy, or negentropy as it is sometimes called, but in a later edition corrected himself in response to complaints and stated that the true source is free energy. (wikipedia.org)
  • Entropy defines the loss of energy present in a closed source system, while Negentropy defines the increase or maintenance of the energy present in an open source system. (energeticsynthesis.com)
  • In 1910, American historian Henry Adams printed and distributed to university libraries and history professors the small volume A Letter to American Teachers of History proposing a theory of history based on the second law of thermodynamics and on the principle of entropy. (wikipedia.org)
  • Entropy is central to the second law of thermodynamics , which states that the entropy of an isolated system left to spontaneous evolution cannot decrease with time. (wikipedia.org)
  • Aimed at feature selection, and provides simple methods to calculate mutual information, conditional mutual information, entropy, conditional entropy, Renyi entropy/mutual information, and weighted variants of Shannon entropies/mutual informations. (mloss.org)
  • Recent studies state that the entropy velocity law allows expeditive methodology for discharge estimation and rating curve development due to the simple mathematical formulation and implementation. (intechopen.com)
  • One method of examining eye movement complexity is gaze entropy which provides a quantitative estimation of where we look (SGE: stationary gaze entropy) and the pattern with which our eyes move between different regions of what we are looking at (GTE: gaze transition entropy). (databasefootball.com)
  • Conditional Shannon entropy estimation: added. (mloss.org)
  • I.A. Ahmad and P.E. Lin, A nonparametric estimation of the entropy for absolutely continuous distributions. (esaim-ps.org)
  • D. Chauveau and P. Vandekerkhove, A Monte Carlo estimation of the entropy for Markov chains. (esaim-ps.org)
  • L. Györfi and E.C. Van Der Meulen, An entropy estimate based on a Kernel density estimation, Limit Theorems in Probability and Statistics Pécs (Hungary). (esaim-ps.org)
  • A. Mokkadem, Estimation of the entropy and information of absolutely continuous random variables. (esaim-ps.org)
  • F.P. Tarasenko, On the evaluation of an unknown probability density function, the direct estimation of the entropy from independent observations of a continuous random variable and the distribution-free entropy test of goodness-of-fit. (esaim-ps.org)
  • Our main technical tool is an entropy power inequality bounding the entropy produced as two quantum signals combine at a beamsplitter. (nature.com)
  • Figure 4: Using the evolution of the inputs and output of a beamsplitter under diffusion to prove the quantum entropy power inequality. (nature.com)
  • The quantum relative entropy captures the statistical distinguishability of two quantum states. (mdpi.com)
  • Classical logical entropy also extends naturally to the notion of quantum logical entropy which provides a more natural and informative alternative to the usual von Neumann entropy in quantum information theory. (ellerman.org)
  • The quantum logical entropy of a post-measurement density matrix has the simple interpretation as the probability that two independent measurements of the same state using the same observable will have different results. (ellerman.org)
  • The main result of the paper is that this increase in quantum logical entropy due to a projective measurement of a pure state is the sum of the absolute squares of the off-diagonal entries (`coherences') of the pure state density matrix that are zeroed (decohered) by the measurement, i.e., the measure of the distinctions (`decoherences') created by the measurement. (ellerman.org)
  • 4. Ramírez-Vargas G, López-Ureña D, Badilla A, patterns shifted during the 2016 Zika virus outbreak. (cdc.gov)
  • The 2016 Zika virus outbreak shifted across time. (cdc.gov)
  • Chem Phys 145 , 034202:1-18 (2016). (lu.se)
  • Chem Phys 144 , 084202:1-16 (2016). (lu.se)
  • How do you determine the change in entropy for a closed system that is subjected to an irreversible process? (physicsforums.com)
  • If I have an irreversible adiabatic process, shouldn't the change in entropy be zero since q/T is zero? (physicsforums.com)
  • Since entropy is a function of the state, shouldn't the change in entropy for an irreversible adiabatic process between an initial and final equilibrium state be the same as that for a reversible adiabatic process between the same two thermodynamic equilibrium states? (physicsforums.com)
  • My objective in this article is to offer my cookbook recipe for determining the change in entropy for an irreversible process on a closed system, and then to provide a few examples of how this recipe can be applied. (physicsforums.com)
  • In the global framework of finding an axiomatic derivation of nonequilibrium Statistical Mechanics from fundamental principles, such as the maximum path entropy -- also known as Maximum Caliber principle -- , this work proposes an alternative derivation of the well-known Jarzynski equality, a nonequilibrium identity of great importance today due to its applications to irreversible processes: biological systems (protein folding), mechanical systems, among others. (arxiv.org)
  • Blachman, N. The convolution inequality for entropy powers. (nature.com)
  • Verdu, S. & Guo, D. A simple proof of the entropy-power inequality. (nature.com)
  • The inequality metric here is of the Generalized Entropy family. (who.int)
  • Lakner and Milanovic (2016) provided estimates for global ine- within-country component in recent Inequality Report painted a rather quality decomposed into separate years. (who.int)
  • The estimates overall global inequality, is sensitive 2016 the global top 1% pul ed away, show that although between-country to how incomes at the very top of the with average income growing 100% inequalities are diminishing, they distribution are accounted for and, compared with 60% growth in the still vastly outweigh within-country indeed, to the measure of inequali- inequalities. (who.int)
  • For all adiabatic processes the entropy of the system does not change (speaking in general) Is this statement correct? (physicsforums.com)
  • In other words, the entropy of the system does not change for an adiabatic reversible process. (physicsforums.com)
  • Research concerning the relationship between the thermodynamic quantity entropy and both the origin and evolution of life began around the turn of the 20th century. (wikipedia.org)
  • As a result, isolated systems evolve toward thermodynamic equilibrium , where the entropy is highest. (wikipedia.org)
  • Multi-component high entropy alloys (MHEAs), defined as four or more components in roughly equi-atomic concentrations randomly arranged on a single phase crystalline lattice, are of current interest due to both their potential for unique thermodynamic phase stability 1-3 and for their potential applications. (aip.org)
  • In this research work, we propose a new approach for an emotion recognition system, using multichannel EEG calculation with our developed entropy known as multivariate multiscale modified-distribution entropy ( MM-mDistEn ) which is combined with a model based on an artificial neural network (ANN) to attain a better outcome over existing methods. (hindawi.com)
  • Linear methods will be used in the frequency domain and non-linear in chaos domain, Poincaré plot, approximate entropy, Detrended Fluctuation Analysis (DFA) and Correlation Dimension. (bvsalud.org)
  • A time-based sliding window algorithm is used to estimate the entropy of the network header features of the incoming network traffic. (hindawi.com)
  • A.V. Ivanov and M.N. Rozhkova, Properties of the statistical estimate of the entropy of a random vector with a probability density (in Russian). (esaim-ps.org)
  • We introduce an original relative entropy for compressible Navier-Stokes equations with density dependent viscosities and discuss some possible applications such as inviscid limit or low Mach number limit. (esaim-proc.org)
  • ITE (Information Theoretical Estimators) is capable of estimating many different variants of entropy, mutual information, divergence, association measures, cross quantities and kernels on distributions. (mloss.org)
  • L. Györfi and E.C. Van Der Meulen, Density-free convergence properties of various estimators of the entropy. (esaim-ps.org)
  • Entropy is "a measure of the disorder that exists in a system. (github.com)
  • Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty. (wikipedia.org)
  • How to find a shift invariant probability measure $\mu$ such that $\int\varphi \,d\mu=0$ and which maximizes the metric entropy $h(\sigma,\mu)$ under this constraint? (mathoverflow.net)
  • The present work is focused on synthesis and heat treatment on non-equiatomic AlCoCrFeNiTi0.5 high entropy alloy (HEA) with a composite structure reinforced by TiC nanoparticles. (chalmers.se)
  • Cubes within the four legs are rotated at different angles and placed at different heights to transform into a chaotic jumble that, like the definition of entropy, lacks order or predictability. (core77.com)
  • Finally, entropy model may represent a robust and useful tool for the water discharge assessment in rough ditches. (intechopen.com)
  • A Maximum Entropy (MaxEnt) algorithm was calibrated with ground data to generate living aboveground biomass (AGB), its associated uncertainty, and forest probability maps for Mexico. (bl.uk)
  • In this paper we present a detection system of HTTP DDoS attacks in a Cloud environment based on Information Theoretic Entropy and Random Forest ensemble learning algorithm. (hindawi.com)
  • among shift-invariant measures $\mu$ such that $\mu(0*) = .9$, the Bernoulli measure of parameter .9 (i.e. the law of the word $\alpha_1\alpha_2\dots$ where the $\alpha_j$ are i.i.d. random variables taking the value $0$ with probability .9) maximizes entropy. (mathoverflow.net)
  • Boole developed finite logical probability as the normalized counting measure on elements of subsets so there is a dual concept of logical entropy which is the normalized counting measure on distinctions of partitions. (ellerman.org)
  • Herein, a dual entropy multi-objective optimization (DEMO) method uses information theory to identify locations where the addition of a hydrometric station would optimally complement the information content of an existing network. (iwaponline.com)
  • In a sample British Columbia streamflow network, he used joint entropy and a stepwise optimization to maximize the information content. (iwaponline.com)
  • considered joint entropy, transinformation (TI) and total correlation as design objectives and used a weighted single objective optimization method to design a hydrometric network in Texas. (iwaponline.com)
  • P.P.B. Eggermont and V.N. LaRiccia, Best asymptotic normality of the Kernel density entropy estimator for Smooth densities. (esaim-ps.org)
  • These findings are described in the article entitled A review of gaze entropy as a measure of visual scanning efficiency , recently published in the journal Neuroscience & Biobehavioral Reviews . (databasefootball.com)
  • Gaze transition entropy, in particular, indicates how much top-down input (our knowledge and understanding) is contributing towards the control of our eye movements. (databasefootball.com)
  • Among shift-invariant measures $\mu$ such that $\mu(01*) = 2\mu(11*)$, the Markov measure associated to the transition probabilities \begin{align*} \mathbb{P}(0\to 0) &= 1-a & \mathbb{P}(0\to1) &= a \\ \mathbb{P}(1\to0) &= \frac23 & \mathbb{P}(1\to1) &= \frac13 \end{align*} where $a$ is the only real solution to $$(1-a)^5=\frac{4}{27} a^2 \qquad (a\simeq 0.487803)$$ maximizes entropy. (mathoverflow.net)
  • Strävan efter en cirkulär ekonomi i den danska avfallssektorn: Scale och Transition Dynamics i transformativ innovationspolitik. (lu.se)
  • Ideas about the relationship between entropy and living organisms have inspired hypotheses and speculations in many contexts, including psychology, information theory, the origin of life, and the possibility of extraterrestrial life. (wikipedia.org)
  • The article "Musical Style, Psychoaesthetics, and Prospects for Entropy as an Analytic Tool" by E. Margulis and A. Beatty ( CMJ 32:4, Winter 2008) referred to a 1997 article by N. Nettelheim on pp. 64 and 78. (mit.edu)
  • The present work deals with the use of entropy velocity profile approach in order to give a general framework of threats and opportunities related to robust operational application of such laws in the field of rating curve assessment. (intechopen.com)
  • Austrian physicist Ludwig Boltzmann explained entropy as the measure of the number of possible microscopic arrangements or states of individual atoms and molecules of a system that comply with the macroscopic condition of the system. (wikipedia.org)
  • LCA*: an entropy-based measure for taxonomic assignment within assembled metagenomes. (cdc.gov)
  • Entropy can be both transferred with heat and also generated by irreversibilities within the system. (physicsforums.com)
  • The Entropy Table is still in prototype phase, but we're hoping it comes to life soon. (core77.com)
  • Maximum information ​ , or at least maximum ​information that intelligence finds ​ interesting ​,​ seem to be about ​ midway between maximum and minimum ​ entropy. (extropy.org)
  • A coherent understanding of science leads to a coalescing of the scientific narrative under the one conceit that is true across the branches of science: there is only entropy. (skeptic.com)
  • Discussion regarding the art and science of creating holes of low entropy, shifting them around, and then filling them back up to operate some widget. (blogspot.com)
  • He initially described it as transformation-content , in German Verwandlungsinhalt , and later coined the term entropy from a Greek word for transformation . (wikipedia.org)
  • i) A new entropy method called multivariate multiscale modified-distribution entropy (MM-mDistEn) has been developed. (hindawi.com)
  • Plus, there is an infinite number of reversible process paths that can take you from the initial state to the final state, and they will all give exactly the same value for the change in entropy. (physicsforums.com)
  • This will be your change of entropy S. That is, ##\Delta S=\int\frac{dq_{rev}}{T}##, where the subscript rev refers to the reversible path. (physicsforums.com)
  • In 1863, Rudolf Clausius published his noted memoir On the Concentration of Rays of Heat and Light, and on the Limits of Its Action, wherein he outlined a preliminary relationship, based on his own work and that of William Thomson (Lord Kelvin), between living processes and his newly developed concept of entropy. (wikipedia.org)