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Article
Publication date: 1 August 1997

Kenneth D. Bailey

A number of entropy models of social systems have been developed recently. Unfortunately, the complementarity of these approaches remains largely unanalysed, due to…

Abstract

A number of entropy models of social systems have been developed recently. Unfortunately, the complementarity of these approaches remains largely unanalysed, due to terminological and conceptual differences among them. There is an urgent need for a meta‐theoretical framework that will facilitate the analysis and comparison of all social entropy models. System entropy analysis (SEA), as presented here, is designed to fill this need. It is a second‐order, meta‐analytic tool which analyses each approach in terms of its major concepts, its basic units of analysis, its definition and measurement of entropy, and its specification of microstates and macrostates. First discusses the need for SEA, and then specifies its structure. Concludes with an application of SEA to the comparison and integration of three entropy approaches: synergetics, complexity theory and social entropy theory (SET).

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Kybernetes, vol. 26 no. 6/7
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 November 1994

Hemendra D. Sharma, Sushil D. Gupta and Anand D. Gupta

Considers that when efficiency and effectiveness of systems are measured by the quantity and quality of their output they may be inadequate for the purpose of comparing…

Abstract

Considers that when efficiency and effectiveness of systems are measured by the quantity and quality of their output they may be inadequate for the purpose of comparing one system with another. Seeks new criteria and defines entropy, wastivity and quality concepts in relation to system performance. Establishes the interdependence of the three concepts. Proposes that system wastivity should be used as a measure of system performance.

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Kybernetes, vol. 23 no. 8
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 April 1990

Guy Jumarie

By combining the subjective probabilistic viewpoint of fuzziness with the entropy of deterministic functions, it is possible to expand an information theory of fuzzy sets…

Abstract

By combining the subjective probabilistic viewpoint of fuzziness with the entropy of deterministic functions, it is possible to expand an information theory of fuzzy sets which is fully compatible and consistent with the classical Shannonian information theoretic framework. A model of transinformation between fuzzy sets, which could be of help in approximate reasoning can be obtained, an interesting feature of which is that it can be duplicated in the framework of fuzzy set theory.

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Kybernetes, vol. 19 no. 4
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 13 June 2008

Stefan Gößling‐Reisemann

The paper attempts to address both resource consumption and recycling effectiveness, using concepts from thermodynamics: entropy production for evaluating the costs…

Abstract

Purpose

The paper attempts to address both resource consumption and recycling effectiveness, using concepts from thermodynamics: entropy production for evaluating the costs (resource consumption) and statistical entropy for evaluating the benefits (separation of materials) of recycling processes.

Design/methodology/approach

Resource consumption, in this context, is to be understood as the overall thermodynamic devaluation of matter and energy flows. The recycling effectiveness, on the other hand, can be measured by the process's ability to reduce the “mixedness” of the material flows, using statistical entropy (entropy of mixing) as an indicator. Statistical entropy has been used by others as an indicator for the performance of waste separation processes, and its application to metal recycling seems straightforward. Entropy production has been applied as a measure for resource consumption in copper production. Here, the two concepts are combined to reach an expression describing the resource efficiency of recycling.

Findings

The theoretical description of the approach is supported by an example calculation for copper recycling. The findings suggest a near perfect effectiveness of the copper separation when processing medium grade copper scrap in a primary copper smelter. The resource consumption, on the other hand, is quite large when compared to the service of the process, giving rise to a rather small thermodynamic efficiency (in terms of the definition of efficiency as applied in this paper).

Research limitations/implications

Both measures used here, recycling efficiency and recycling effectiveness, are very demanding concerning the data basis, making applications time consuming. These drawbacks can be overcome by linking material flow tools (e.g. LCA software) with thermodynamic databases. More examples have to be considered to show the practical relevance of the approach.

Originality/value

The paper addresses effectiveness and efficiency using a common denominator, thermodynamic entropy. This unification helps in ranking different recycling options regarding their performance in terms of technical effectiveness and resource consumption.

Details

Management of Environmental Quality: An International Journal, vol. 19 no. 4
Type: Research Article
ISSN: 1477-7835

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Article
Publication date: 1 February 1989

Tom Stonier

Future developments of computer systems will be handicapped not by the limitations of hardware, but by our lack of understanding of the human reasoning processes. The…

Abstract

Future developments of computer systems will be handicapped not by the limitations of hardware, but by our lack of understanding of the human reasoning processes. The development of three‐dimensional chips, cryogenic superconducting, or optical systems — and in due course, biological computers — presages the emergence of generations of super information processors whose power will dwarf the present generation of devices as they, in turn, have dwarfed the capacity of the computers of the pre‐transistor age. The effective application of such powerful future computers will be limited by the lack of an adequate theoretical basis for the processing of information. Gordon Scarrott has championed the need for a ‘science of information’ which should investigate the ‘natural properties of information such as function, structure, dynamic behaviour and statistical features…’ Such an effort should ‘… lead to a conceptual framework to guide systems design.’

Details

Aslib Proceedings, vol. 41 no. 2
Type: Research Article
ISSN: 0001-253X

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Article
Publication date: 1 October 2002

Doru Tsaganea

In this article the mathematical formula of entropy is used to evaluate the degree of anarchy specific to multipolar, bipolar, and balance of power international political…

Abstract

In this article the mathematical formula of entropy is used to evaluate the degree of anarchy specific to multipolar, bipolar, and balance of power international political systems. Several entropic properties characteristic to these systems are deduced, and it is proved that alliances decrease international systems' entropy. Each international system it is observed is characterized by a specific amount of structural strain, and that under the assumptions of structural neo‐realism the entropy and structural strain move in opposite ways. On the basis of these findings a few properties regarding the stability of international systems are divided and the effects of alliances on international structural strain are examined. In the last part of the paper theoretical conclusions are tested against three empirical cases – the Cold War bipolar system, the XIXth Century European system, and the current one. The article ends with several methodological suggestions regarding a possible generalization of the entropic model.

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Kybernetes, vol. 31 no. 7/8
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 13 March 2017

Susan L. Golicic, Daniel J. Flint and Paola Signori

The purpose of this paper is to address how wine businesses build sustainability – the ability to survive and be successful over the long-term – in a complex market environment.

Abstract

Purpose

The purpose of this paper is to address how wine businesses build sustainability – the ability to survive and be successful over the long-term – in a complex market environment.

Design/methodology/approach

To understand how managers in a wine supply chain (i.e. from grower to consumer) are trying to sustain business within a hyper-competitive industry, the authors used a standard grounded theory, constant comparative research method using formal depth interviews along with additional data sources from wine businesses in nine global wine regions in the USA, Australia, Italy and New Zealand.

Findings

A framework emerged from the data to improve business sustainability and counteract the complexity in the wine market by developing resilience through innovating and experimenting, obtaining resources/developing capabilities and relying on supply chain connections.

Research limitations/implications

This conceptual framework contributes to the existing theory on institutional transitions and resilience in business, and extends and broadens it by proposing that resilience is needed to combat entropy in the wine industry for businesses in this industry to survive and thrive.

Practical implications

Managers can learn from and apply the examples mentioned in this study and follow the framework presented to implement the strategies to build resilience to increase their chances of sustainability.

Originality/value

This study is one of the first empirical studies to the authors’ knowledge that identifies the impact of entropy in the wine industry and examines resilience as a means to combat an entropic market and obtain business sustainability.

Details

International Journal of Wine Business Research, vol. 29 no. 1
Type: Research Article
ISSN: 1751-1062

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Article
Publication date: 28 October 2014

Mohamed Hichem Gazzah and Hafedh Belmabrouk

The effects of a co-flow and inlet jet temperature on local entropy generation in turbulent round jets have been studied numerically. The second-order closure turbulence…

Abstract

Purpose

The effects of a co-flow and inlet jet temperature on local entropy generation in turbulent round jets have been studied numerically. The second-order closure turbulence model has been used. The paper aims to discuss these issues.

Design/methodology/approach

Numerical results are presented and discussed.

Findings

The numerical results for the mean quantities, entrainment of air, mixing efficiency, generation of entropy rate and Merit number are presented and discussed.

Originality/value

The expansion of the jet at low velocity of the co-flow and high inlet jet temperature enhances the heat transfer rate and reduces the irreversibility of the jet.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 24 no. 8
Type: Research Article
ISSN: 0961-5539

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Book part
Publication date: 25 July 1997

Abstract

Details

Applying Maximum Entropy to Econometric Problems
Type: Book
ISBN: 978-0-76230-187-4

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Article
Publication date: 17 May 2021

Fazle Mabood, Anum Shafiq, Waqar Ahmed Khan and Irfan Anjum Badruddin

This study aims to investigate the irreversibility associated with the Fe3O4–Co/kerosene hybrid-nanofluid past a wedge with nonlinear radiation and heat source.

Abstract

Purpose

This study aims to investigate the irreversibility associated with the Fe3O4–Co/kerosene hybrid-nanofluid past a wedge with nonlinear radiation and heat source.

Design/methodology/approach

This study reports the numerical analysis of the hybrid nanofluid model under the implications of the heat source and magnetic field over a static and moving wedge with slips. The second law of thermodynamics is applied with nonlinear thermal radiation. The system that comprises differential equations of partial derivatives is remodeled into the system of differential equations via similarity transformations and then solved through the Runge–Kutta–Fehlberg with shooting technique. The physical parameters, which emerges from the derived system, are discussed in graphical formats. Excellent proficiency in the numerical process is analyzed by comparing the results with available literature in limiting scenarios.

Findings

The significant outcomes of the current investigation are that the velocity field uplifts for higher velocity slip and magnetic strength. Further, the heat transfer rate is reduced with the incremental values of the Eckert number, while it uplifts with thermal slip and radiation parameters. An increase in Brinkmann’s number uplifts the entropy generation rate, while that peters out the Bejan number. The results of this study are of importance involving in the assessment of the effect of some important design parameters on heat transfer and, consequently, on the optimization of industrial processes.

Originality/value

This study is original work that reports the hybrid nanofluid model of Fe3O4–Co/kerosene.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0961-5539

Keywords

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