Next Issue
Previous Issue

E-Mail Alert

Add your e-mail address to receive forthcoming issues of this journal:

Journal Browser

Journal Browser

Table of Contents

Entropy, Volume 8, Issue 2 (June 2006), Pages 44-112

  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list.
  • You may sign up for e-mail alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Readerexternal link to open them.
View options order results:
result details:
Displaying articles 1-6
Export citation of selected articles as:

Editorial

Jump to: Research, Other

Open AccessEditorial Editor-in-Chief's Report
Entropy 2006, 8(2), 110-112; doi:10.3390/e8020110
Received: 2 March 2006 / Accepted: 2 June 2006 / Published: 14 June 2006
PDF Full-text (74 KB)

Research

Jump to: Editorial, Other

Open AccessArticle Entropy Generation in Pressure Gradient Assisted Couette Flow with Different Thermal Boundary Conditions
Entropy 2006, 8(2), 50-62; doi:10.3390/e8020050
Received: 9 February 2006 / Accepted: 3 May 2006 / Published: 4 May 2006
Cited by 15 | PDF Full-text (192 KB)
Abstract
The present paper is concerned with an analytical study of entropy generation in viscous, incompressible Couette flow between a stationary plate and a moving plate. The flow induced by the moving plate is assisted by a constant pressure gradient along the flow direction.
[...] Read more.
The present paper is concerned with an analytical study of entropy generation in viscous, incompressible Couette flow between a stationary plate and a moving plate. The flow induced by the moving plate is assisted by a constant pressure gradient along the flow direction. Four different combinations of thermal boundary conditions are investigated: (a) plates at different temperatures, (b) stationary plate at a fixed temperature and moving plate subjected to a constant heat flux, (c) stationary plate at a fixed temperature and convection at the moving plate, and (d) convection at both plates. Besides the velocity and temperature profiles, dimensionless results are presented for the entropy generated due to heat transfer, the entropy generated due to viscous dissipation, and the total entropy generation. These results illustrate the effect of pressure gradient, temperature asymmetry, heat flux, convection Biot numbers, and ambient temperatures. For certain combinations of thermal variables, the total entropy generated is minimized. Full article
Open AccessArticle Entropy and Energy in Quantum Measurement
Entropy 2006, 8(2), 63-66; doi:10.3390/e8020063
Received: 24 February 2006 / Accepted: 10 May 2006 / Published: 12 May 2006
Cited by 2 | PDF Full-text (109 KB)
Abstract
On the basis of the classical axioms of non relativistic quantum mechanics, we develop a model for the interplay between energy and entropy in the process of quantum measurement and shed light on the scope of some of the axioms with regard to
[...] Read more.
On the basis of the classical axioms of non relativistic quantum mechanics, we develop a model for the interplay between energy and entropy in the process of quantum measurement and shed light on the scope of some of the axioms with regard to the measurement problem. Full article
Open AccessArticle Inference with the Median of a Prior
Entropy 2006, 8(2), 67-87; doi:10.3390/e8020067
Received: 14 February 2006 / Accepted: 9 June 2006 / Published: 13 June 2006
PDF Full-text (215 KB)
Abstract
We consider the problem of inference on one of the two parameters of a probability distribution when we have some prior information on a nuisance parameter. When a prior probability distribution on this nuisance parameter is given, the marginal distribution is the classical
[...] Read more.
We consider the problem of inference on one of the two parameters of a probability distribution when we have some prior information on a nuisance parameter. When a prior probability distribution on this nuisance parameter is given, the marginal distribution is the classical tool to account for it. If the prior distribution is not given, but we have partial knowledge such as a fixed number of moments, we can use the maximum entropy principle to assign a prior law and thus go back to the previous case. In this work, we consider the case where we only know the median of the prior and propose a new tool for this case. This new inference tool looks like a marginal distribution. It is obtained by first remarking that the marginal distribution can be considered as the mean value of the original distribution with respect to the prior probability law of the nuisance parameter, and then, by using the median in place of the mean. Full article
Open AccessArticle Symmetry Studies and Decompositions of Entropy
Entropy 2006, 8(2), 88-109; doi:10.3390/e8020088
Received: 13 January 2006 / Accepted: 24 April 2006 / Published: 14 June 2006
Cited by 7 | PDF Full-text (373 KB)
Abstract
This paper describes a group-theoretic method for decomposing the entropy of a finite ensemble when symmetry considerations are of interest. The cases in which the elements in the ensemble are indexed by {1,2,...,n} and by the permutations of a finite set are considered
[...] Read more.
This paper describes a group-theoretic method for decomposing the entropy of a finite ensemble when symmetry considerations are of interest. The cases in which the elements in the ensemble are indexed by {1,2,...,n} and by the permutations of a finite set are considered in detail and interpreted as particular cases of ensembles with elements indexed by a set subject to the actions of a finite group. Decompositions for the entropy in binary ensembles and in ensembles indexed by short DNA words are discussed. Graphical descriptions of the decompositions of the entropy in geological samples are illustrated. The decompositions derived in the present cases follow from a systematic data analytic tool to study entropy data in the presence of symmetry considerations. Full article

Other

Jump to: Editorial, Research

Open AccessLetter Remarks on the Compatibility of Opposite Arrows of Time II
Entropy 2006, 8(2), 44-49; doi:10.3390/e8010044
Received: 13 March 2006 / Accepted: 4 April 2006 / Published: 5 April 2006
Cited by 4 | PDF Full-text (100 KB)
Abstract
In a series of papers [1,2,3], Lawrence Schulman presented examples which demonstrate the compatibility of opposite arrows of time in various situations. In a previous letter to this journal [4] I questioned some of them for not being realistic in spite of being
[...] Read more.
In a series of papers [1,2,3], Lawrence Schulman presented examples which demonstrate the compatibility of opposite arrows of time in various situations. In a previous letter to this journal [4] I questioned some of them for not being realistic in spite of being logically correct. Schulman replied [5] to these objections in a letter directly succeeding my one. I am here trying to clarify some aspects of the dispute, thereby further explaining and supporting my previous conclusions. Full article

Journal Contact

MDPI AG
Entropy Editorial Office
St. Alban-Anlage 66, 4052 Basel, Switzerland
entropy@mdpi.com
Tel. +41 61 683 77 34
Fax: +41 61 302 89 18
Editorial Board
Contact Details Submit to Entropy
Back to Top