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 9, Issue 4 (December 2007), Pages 152-232

  • 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 1-4
Export citation of selected articles as:

Research

Jump to: Review, Other

Open AccessArticle On Optimization of a Non-Endorreversible Curzon-Ahlborn Cycle
Entropy 2007, 9(4), 186-197; doi:10.3390/e9040186
Received: 27 August 2007 / Revised: 6 October 2007 / Accepted: 17 December 2007 / Published: 21 December 2007
Cited by 10 | PDF Full-text (183 KB) | HTML Full-text | XML Full-text
Abstract
A non-endoreversible Curzon and Ahlborn cycle is analyzed by introducing afactor of non-endoreversibility. The form of power output and ecological function, andthe role of this factor is discussed. The Gutkowics-Krusin, Procaccia and Ross method tobuild a general expression for both the power output
[...] Read more.
A non-endoreversible Curzon and Ahlborn cycle is analyzed by introducing afactor of non-endoreversibility. The form of power output and ecological function, andthe role of this factor is discussed. The Gutkowics-Krusin, Procaccia and Ross method tobuild a general expression for both the power output and the ecological function for thiscycle is used. A numerical analysis of these expresions is made and the results arecompared with other kind of approaches found in the literature of finite timethermodynamics. Full article
Open AccessArticle Design of Experiments: Useful Orthogonal Arrays for Number of Experiments from 4 to 16
Entropy 2007, 9(4), 198-232; doi:10.3390/e9040198
Received: 22 August 2007 / Revised: 2 January 1995 / Accepted: 1 November 2007 / Published: 31 December 2007
Cited by 19 | PDF Full-text (301 KB) | HTML Full-text | XML Full-text
Abstract
A methodology for the design of an experiment is proposed in order to find asmany schemes as possible with the maximum number of factors with different levels for thesmallest number of experimental runs. An algorithm was developed and homemadesoftware was implemented. The abilities
[...] Read more.
A methodology for the design of an experiment is proposed in order to find asmany schemes as possible with the maximum number of factors with different levels for thesmallest number of experimental runs. An algorithm was developed and homemadesoftware was implemented. The abilities in generation of the largest groups of orthogonalarrays were analyzed for experimental runs of 4, 6, 8, 9, 10, 12, 14, 15, and 16. The resultsshow that the proposed method permits the construction of the largest groups of orthogonalarrays with the maximum number of factors. Full article

Review

Jump to: Research, Other

Open AccessReview Geometric Entropy of Self-Gravitating Systems
Entropy 2007, 9(4), 169-185; doi:10.3390/e9040169
Received: 30 April 2007 / Accepted: 12 September 2007 / Published: 29 November 2007
PDF Full-text (225 KB)
Abstract
We shall review different approaches to the entropy of self-gravitating systems inGeneral Relativity. Then we shall discuss in detail the macroscopic approach based on a la `Clausius point of view. Recent developments will be reviewed discussing the aims as well asthe assumptions which
[...] Read more.
We shall review different approaches to the entropy of self-gravitating systems inGeneral Relativity. Then we shall discuss in detail the macroscopic approach based on a la `Clausius point of view. Recent developments will be reviewed discussing the aims as well asthe assumptions which the framework is based on. Full article

Other

Jump to: Research, Review

Open AccessOther A Simple Thermodynamic Analysis of Photosynthesis
Entropy 2007, 9(4), 152-168; doi:10.3390/e9040152
Received: 24 October 2006 / Revised: 26 September 2007 / Accepted: 4 October 2007 / Published: 26 November 2007
Cited by 11 | PDF Full-text (256 KB) | HTML Full-text | XML Full-text
Abstract
In this paper we present a comparative study of nine photosynthetic pathways bymeans of their thermodynamic performance. The comparison is made by using the thermalefficiency of light-to-chemical energy conversion and the so-called ecological criterionarising from finite-time thermodynamics. The application of both criteria leads
[...] Read more.
In this paper we present a comparative study of nine photosynthetic pathways bymeans of their thermodynamic performance. The comparison is made by using the thermalefficiency of light-to-chemical energy conversion and the so-called ecological criterionarising from finite-time thermodynamics. The application of both criteria leads tophotosynthesis made by metaphytes and non sulfur purple bacteria as those of bestthermodynamic performance. In spite of the simplicity of our thermodynamic approachsome insights over the low overall efficiency of photosynthesis is suggested. 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