a thermodynamic quantity that changes in a reversible process by an amount equal to the heat absorbed or emitted divided by the thermodynamic temperature. It is measured in joules per kelvin
Symbol: S. See also law of thermodynamics
2.
a statistical measure of the disorder of a closed system expressed by S = klog P + c where P is the probability that a particular state of the system exists, k is the Boltzmann constant, and c is another constant
3.
lack of pattern or organization; disorder
4.
a measure of the efficiency of a system, such as a code or language, in transmitting information
Word origin
C19: from en-2 + -trope
Examples of 'entropies' in a sentence
entropies
We then showed which biases are introduced in models obtained by maximizing nonadditive entropies.
Steve Pressé, Kingshuk Ghosh, Julian Lee, Ken A. Dill 2015, 'Reply to C. Tsallis' “Conceptual Inadequacy of the Shore and Johnson Axioms for WideClasses of Complex Systems”', Entropyhttp://www.mdpi.com/1099-4300/17/7/5043. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The collected data have been processed using parameterized entropies and data mining algorithms.
Bartosz Kowalik, Marcin Szpyrka 2019, 'An Entropy-Based Car Failure Detection Method Based on Data Acquisition Pipeline',Entropyhttps://www.mdpi.com/1099-4300/21/4/426. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The bands are transmitted according to the descending order of their respective entropies.
Awad Kh. Al-Asmari, Vinay J. Singh, Subhash C. Kwatra 2003, 'Hybrid Coding of Images for Digital Cellular Channel', Journal of King Saud University: Engineering Scienceshttp://www.sciencedirect.com/science/article/pii/S1018363918307839. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The calculated enthalpies, and entropies of sorption were all positive for the solvents investigated.
Isaac O. Igwe, Obumneme E. Ezeani 2012, 'Studies on the Transport of Aromatic Solvents through Filled Natural Rubber', International Journal of Polymer Sciencehttp://dx.doi.org/10.1155/2012/212507. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Using adsorption isotherm data, standard differential molar enthalpies and entropies of adsorption have been calculated.
M. Friedrich, K.H. Radeke, A.A. Isirikyan, R.S. Vartapetyan 1990, 'Adsorption of Water on Activated Carbon — a Thermodynamic Study by Immersion Calorimetry',Adsorption Science & Technologyhttps://doi.org/10.1177/026361749000700304. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Even multiple passwords are not preferred due to low entropies.
M. L. SINGH, AJAY KAKKAR, P. K. BANSAL 2012, 'SECURE COMMUNICATION BY USING MULTIPLE KEYS HAVING VARIABLE LENGTH IN A REAL TIMEENVIRONMENT FOR MULTIPLE STATIONS', Journal of Engineering Science and Technologyhttp://jestec.taylors.edu.my/Vol%207%20Issue%204%20August%2012/Vol_7_4_505-516_AJAY%20KAKKAR.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The computed entropy measures are average wavelet, permutation, fuzzy and phase entropies.
Rajeev Sharma, Ram Bilas Pachori, U. Rajendra Acharya 2015, 'An Integrated Index for the Identification of Focal Electroencephalogram Signals UsingDiscrete Wavelet Transform and Entropy Measures', Entropyhttp://www.mdpi.com/1099-4300/17/8/5218. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The new entropies depend on assigning a probability distribution about the degrees to a network.
Guoxiang Lu 2017, 'Generalized Degree-Based Graph Entropies', Symmetryhttp://www.mdpi.com/2073-8994/9/3/29. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We also suggest experimental protocols for measuring spacetime entropies.
Jordan Cotler, Chao-Ming Jian, Xiao-Liang Qi, Frank Wilczek 2018, 'Superdensity operators for spacetime quantum mechanics', Journal of High Energy Physicshttp://link.springer.com/article/10.1007/JHEP09(2018)093. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Empirical entropic indices are obtained from the empirical entropies for two streamwise stations.
LaVar King Isaacson 2014, 'Transitional Intermittency Exponents Through Deterministic Boundary-Layer Structuresand Empirical Entropic Indices', Entropyhttp://www.mdpi.com/1099-4300/16/5/2729. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)