Results 11 to 20 of about 1,533,087 (281)

Entropy production and the arrow of time

open access: yesNew Journal of Physics, 2009
We present an exact relationship between the entropy production and the distinguishability of a process from its time-reverse, quantified by the relative entropy between forward and backward states.
  +16 more
core   +3 more sources

Hydrophobic Mesoporous Silica-Coated Solid-Phase Microextraction Arrow System for the Determination of Six Biogenic Amines in Pork and Fish

open access: yesFoods, 2023
In this study, a functionalized mesoporous silica-coated solid-phase microextraction (SPME) Arrow system was developed for the enrichment of six biogenic amines (BAs) from pork and fish samples before gas chromatographic separation with a mass ...
Mengfei Chen   +3 more
doaj   +1 more source

Epistemological Suggestions in „Entropy Low and Economic Process” [PDF]

open access: yesTheoretical and Applied Economics, 2006
The paper is aimed to derive, on criticism basis (following, especially, the critic rationalism, as method), epistemological suggestions from the crucial work of Nicholas Georgescu-Roegen, “The Entropy Law and the Economic Process”, in order to these ...
Emil Dinga, Cornel Ionescu
doaj   +1 more source

Remarks on the Compatibility of Opposite Arrows of Time II

open access: yesEntropy, 2006
In a series of papers [1,2,3], Lawrence Schulman presented examples which demonstrate the compatibility of opposite arrows of time in various situations.
H. D. Zeh
doaj   +1 more source

Wormholes and the thermodynamic arrow of time

open access: yesPhysical Review Research, 2020
In classical thermodynamics, heat cannot spontaneously pass from a colder system to a hotter system, which is called the thermodynamic arrow of time. However, if the initial states are entangled, the direction of the thermodynamic arrow of time may not ...
Zhuo-Yu Xian, Long Zhao
doaj   +1 more source

A Lenient Causal Arrow of Time?

open access: yesEntropy, 2018
One of the basic assumptions underlying Bell’s theorem is the causal arrow of time, having to do with temporal order rather than spatial separation.
Nathan Argaman
doaj   +1 more source

Alternative interpretation of relativistic time-reversal and the time arrow

open access: yesPhysical Review Research, 2022
It is well known that the 4-rotation in four-dimensional space-time is equivalent to the CPT transformation (C is the charge conjugation, P is the space inversion, and T is the time reversal). The standard definition of the T reversal includes the change
T. Zalialiutdinov   +4 more
doaj   +1 more source

The Importance of Boundary Conditions in Quantum Mechanics [PDF]

open access: yes, 2003
We discuss the role of boundary conditions in determining the physical content of the solutions of the Schrodinger equation. We study the standing-wave, the ``in,'' the ``out,'' and the purely outgoing boundary conditions. As well, we rephrase Feynman's $
A. F. J. Siegert   +16 more
core   +3 more sources

Discovering the Arrow of Time in Machine Learning

open access: yesInformation, 2021
Machine learning (ML) is increasingly useful as data grow in volume and accessibility. ML can perform tasks (e.g., categorisation, decision making, anomaly detection, etc.) through experience and without explicit instruction, even when the data are too ...
J. Kasmire, Anran Zhao
doaj   +1 more source

Entanglement and the Thermodynamic Arrow of Time [PDF]

open access: yes, 2010
We discuss quantum entanglement in the context of the thermodynamic arrow of time. We review the role of correlations in entropy-decreasing events and prove that the occurrence of a transformation between two thermodynamic states constitutes a new type ...
A. Peres   +7 more
core   +2 more sources

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