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Article
Publication date: 8 February 2008

A.S. Fragakis and C. Thomson

259

Abstract

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Nutrition & Food Science, vol. 38 no. 1
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 1 December 2003

Dimos C. Charmpis and Manolis Papadrakakis

Balancing and dual domain decomposition methods (DDMs) comprise a family of efficient high performance solution approaches for a large number of problems in computational…

502

Abstract

Balancing and dual domain decomposition methods (DDMs) comprise a family of efficient high performance solution approaches for a large number of problems in computational mechanics. Such DDMs are used in practice on parallel computing environments with the number of generated subdomains being generally larger than the number of available processors. This paper presents an effective heuristic technique for organizing the subdomains into subdomain clusters, in order to assign each cluster to a processor. This task is handled by the proposed approach as a graph partitioning optimization problem using the publicly available software METIS. The objective of the optimization process is to minimize the communication requirements of the DDMs under the constraint of producing balanced processor workloads. This constraint optimization procedure for treating the subdomain cluster generation task leads to increased computational efficiencies for balancing and dual DDMs.

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Engineering Computations, vol. 20 no. 8
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 3 August 2012

Alexander Nock, Udechukwu Ojiako, Tolga Bektas and Max Chipulu

The way and manner in which energy is produced is known to have a significant impact on emissions. For this reason, the UK government has sought to enhance the efficiency of…

626

Abstract

Purpose

The way and manner in which energy is produced is known to have a significant impact on emissions. For this reason, the UK government has sought to enhance the efficiency of energy production/conversion by focusing on a number of energy production approaches, including Combined Heat and Power (CHP). The purpose of this paper is to describe a practical approach for assessing the feasibility of CHP.

Design/methodology/approach

The authors provide an overview of Combined Heat and Power (CHP); describe a new and easy‐to‐implement feasibility and optimisation model to aid in the installation of CHP; and discuss the practical feasibility issues of CHP through an analysis of existing case studies using the proposed model. The modelling utilises regression models which are created using historical data obtained from public sources.

Findings

Compared against alternatives, the model is shown to be particularly useful, as its functionality is embedded in resource‐intensive prime mover specifications obtained from seven real industrial cases.

Originality/value

The need for such a practical and easy‐to‐use model is driven by the existence of numerous models, which are mainly complex and not necessarily “user‐friendly”. The proposed model is set to provide a practical and user‐friendly model for CHP appraisal that is easy to understand and assess in terms of prime movers such as capital cost, payback, annual financial and CO2 savings.

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Management of Environmental Quality: An International Journal, vol. 23 no. 5
Type: Research Article
ISSN: 1477-7835

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Article
Publication date: 28 June 2011

Alexander Nock, Udechukwu Ojiako, Tolga Bektas and Max Chipulu

This paper seeks to set out opportunities for the development of a UK‐focused feasibility and sizing model utilising linear programming.

491

Abstract

Purpose

This paper seeks to set out opportunities for the development of a UK‐focused feasibility and sizing model utilising linear programming.

Design/methodology/approach

Optimisation of the model is conducted using integer linear programming developed using Excel Solver.

Findings

When compared with comparable alternatives, the model is shown to be particularly useful as its functionality is embedded in resource intensive prime mover specifications obtained from seven real industrial cases.

Research limitations/implications

The study acknowledges the limitation of utilising sizing data primarily obtained from secondary sources to develop the model.

Originality/value

The practical usefulness of this model is that it has been built using “real”, as opposed to simulated‐data. When compared with comparable alternatives, the model is shown to be articularly useful as its functionality is embedded in resource intensive prime mover specifications obtained from seven real industrial cases.

Details

International Journal of Energy Sector Management, vol. 5 no. 2
Type: Research Article
ISSN: 1750-6220

Keywords

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Book part
Publication date: 4 November 2021

Iordanis Katemliadis and Andreas Papatheodorou

The tourism industry in Greece has come a long way since its beginning as a distinct economic activity to reach the recent impressive results. It is a sector that has grown…

Abstract

The tourism industry in Greece has come a long way since its beginning as a distinct economic activity to reach the recent impressive results. It is a sector that has grown remarkably and became a major source of growth for the Greek economy. As such this chapter aims to discuss the importance and the potential of the sector, the unique characteristics of the Greek tourism industry and the future challenges ahead. Tables and suitable graphics are provided to visually enhance and inform the discussion. A wide range of articles, journals, books, and electronic sources has been reviewed to present as accurately and up to date information as possible. This chapter can therefore prove useful for academics and non-academics to use it as a reference point for the tourism sector in Greece.

Details

Modeling Economic Growth in Contemporary Greece
Type: Book
ISBN: 978-1-80071-123-5

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Article
Publication date: 28 May 2010

S. Belesis and G. Labeas

The purpose of this paper is to present an efficient engineering methodology for solving the problem of non‐linear (NL) damage and post‐buckling of large‐scale structures, which…

928

Abstract

Purpose

The purpose of this paper is to present an efficient engineering methodology for solving the problem of non‐linear (NL) damage and post‐buckling of large‐scale structures, which is of high importance mainly for the aircraft industry.

Design/methodology/approach

The methodology takes advantage of the capabilities of finite element substructuring technique in the simulation of large/complex structures and exploits the advantages of local‐global analysis logic. The main innovation deals with the appropriate modification of superelement method, such that it can deal with NL behaviour and efficiently model the entire large‐scale structure. In this study, the proposed methodology is demonstrated in the treatment of geometrical non‐linearity and its efficiency is assessed in the case of a large‐scale fuselage section.

Findings

A method capable of solving large‐scale NL problems by taking advantage of the linear response of the different model regions is developed.

Research limitations/implications

Further development of the proposed method is required for handling other means of non‐linearity.

Originality/value

The proposed approach is advantageous in terms of computational effort over the corresponding conventional ones.

Details

International Journal of Structural Integrity, vol. 1 no. 2
Type: Research Article
ISSN: 1757-9864

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