Search results

1 – 10 of 698
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 1 June 2004

V. Wheatley, H.S. Chiu, P.A. Jacobs, M.N. Macrossan, D.J. Mee and R.G. Morgan

This paper describes a free‐piston driven expansion tube and its instrumentation. The facility is used to generate rarefied flows at speeds of approximately 10 km/s. Although the…

560

Abstract

This paper describes a free‐piston driven expansion tube and its instrumentation. The facility is used to generate rarefied flows at speeds of approximately 10 km/s. Although the flow in the tube itself is in the continuum regime, rarefied flow conditions are achieved by allowing the test gas to further expand as a free jet into the facility's test section. The test flow is surveyed to provide bar‐gauge pressure measurements. Numerical simulation is then used to describe more fully the test flow properties. The flows produced are suitable for the aerodynamic testing of small models at superorbital speeds and should provide data that are suitable for the calibration of Direct Simulation Monte‐Carlo codes.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 14 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

Access Restricted. View access options
Article
Publication date: 1 February 2009

M. Di Gifico, P. Nali and S. Brischetto

Finite elements for the analysis of multilayered plates subjected to magneto‐electro‐elastic fields are developed in this work. An accurate description of the various field…

117

Abstract

Finite elements for the analysis of multilayered plates subjected to magneto‐electro‐elastic fields are developed in this work. An accurate description of the various field variables has been provided by employing a variable kinematic model which is based on the Unified Formulation, UF. Displacements, magnetic and electric potential have been chosen as independent unknowns. Equivalent single layer and layer‐wise descriptions have been accounted for. Plate models with linear up to fourth‐order distribution in the thickness direction have been compared. The extension of the principle of virtual displacements to magneto‐electro‐elastic continua has been employed to derive finite elements governing equations. According to UF these equations are presented in terms of fundamental nuclei whose form is not affected by kinematic assumptions. Results show the effectiveness of the proposed elements as well as their capability, by choosing appropriate kinematics, to accurately trace the static response of laminated plates subject to magneto‐electro‐elastic fields.

Details

Multidiscipline Modeling in Materials and Structures, vol. 5 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

Access Restricted. View access options
Article
Publication date: 12 November 2010

A. Kumaravel, N. Ganesan and Raju Sethuraman

The purpose of the paper is to investigate the linear thermal buckling and vibration analysis of layered and multiphase magneto‐electro‐elastic (MEE) cylinders made of…

457

Abstract

Purpose

The purpose of the paper is to investigate the linear thermal buckling and vibration analysis of layered and multiphase magneto‐electro‐elastic (MEE) cylinders made of piezoelectric/piezomagnetic materials using finite element method.

Design/methodology/approach

The constitutive equations of MEE materials are used to derive the finite element equations involving the coupling between mechanical, electrical, magnetic and thermal fields. The present study is limited to clamped‐clamped boundary conditions. The linear thermal buckling is carried out for an axisymmetric cylinder operating in a steady state axisymmetric uniform temperature rise. The influence of stacking sequences and volume fraction of multiphase MEE materials on critical buckling temperature and vibration behaviour is investigated. The influence of coupling effects on critical buckling temperature and vibration behaviour is also studied.

Findings

The critical buckling temperature is higher for MEE axisymmetric cylinder as compared to elastic cylinder.

Originality/value

Linear thermal buckling and vibration analysis of MEE axisymmetric cylinders are studied using the finite element approach. The structure can be used for active vibration control, sensors and actuators. Studying the buckling and vibration behaviour of such structures and influence of coupling effect is extremely useful for the design of magnetoelectroelastic structures.

Details

Multidiscipline Modeling in Materials and Structures, vol. 6 no. 4
Type: Research Article
ISSN: 1573-6105

Keywords

Access Restricted. View access options
Article
Publication date: 11 September 2017

Kevin D. Tennent

This paper aims to contest Mees’ (2010) theory that publicly owned public transport operators normatively target their resources to maximize service rather than profit. Mees

679

Abstract

Purpose

This paper aims to contest Mees’ (2010) theory that publicly owned public transport operators normatively target their resources to maximize service rather than profit. Mees argues that neoliberal governments in the Anglosphere were mistaken to privatize their undertakings, yet it is shown that the British ethos of municipal trading meant that municipalities always saw public transport as more of a business than a service.

Design/methodology/approach

The author uses an archival microstudy of the municipal tramway undertaking of the English city of York, using municipal archives triangulated with local and industry media sources.

Findings

The paper proposes the refination of the Mees spectrum of public transport from public to private (2010, pp. 73-75) to note that public undertakings can be operated within a profit-maximizing framework.

Originality/value

This paper provides a rare historical explication of an individual municipal trading enterprise and tramway system placed in its economic context together with its wider theoretical implications.

Details

Journal of Management History, vol. 23 no. 4
Type: Research Article
ISSN: 1751-1348

Keywords

Access Restricted. View access options

Abstract

Details

The International Handbook of Black Community Mental Health
Type: Book
ISBN: 978-1-83909-965-6

Access Restricted. View access options
Article
Publication date: 9 June 2020

Nick French

The UK government, in late 2019, announced new proposed targets for the energy efficiency legislation in the UK, MEES – Minimum Energy Efficiency Standards. The current suggestion…

893

Abstract

Purpose

The UK government, in late 2019, announced new proposed targets for the energy efficiency legislation in the UK, MEES – Minimum Energy Efficiency Standards. The current suggestion is that all let properties, commercial or residential, need to be B rated by 2030. If this is implemented, it will have a significant impact upon the UK market property investment market.

Design/methodology/approach

This practice briefing is an overview of the 2018 legislation and comments on how market awareness has changed since its introduction and the potential impact upon prices of affected properties moving forward

Findings

This paper discusses how capital and rental values are beginning to be discounted in the market to allow for current and future liabilities under the MEES legislation. This has a significant impact on strategies for property investment.

Practical implications

This paper analyses the likelihood of (negative) capital and rental value changes under the proposed stricter energy efficiency guidelines.

Originality/value

This provides guidance on how valuations can be undertaken to reflect any impact of the likely changes to UK energy efficiency legislation.

Details

Journal of Property Investment & Finance, vol. 38 no. 5
Type: Research Article
ISSN: 1463-578X

Keywords

Access Restricted. View access options
Book part
Publication date: 12 February 2025

Sorana Vătavu, Cristian Tudorescu, Oana-Ramona Lobonţ, Nicoleta-Claudia Moldovan and Florin Costea

Purpose/Objective: The shadow economy problem comes from the need for governments to increase their revenues, while citizens expect better social protection schemes such as…

Abstract

Purpose/Objective: The shadow economy problem comes from the need for governments to increase their revenues, while citizens expect better social protection schemes such as universal basic income, increased spending for social security, and better living standards, including a sustainable and green environment. Our study analyses a complex and multifaced relationship between the shadow economy and the environment.

Design/Methodology/Approach: The analysis refers to the shadow economy (% in GDP) and three environmental proxies (Agriculture Methane Emissions, Methane Emissions for the Energy Sector, and Tax on Pollution) for the EU countries over the 2009–2019 period. Firstly, we describe the evolution of the indicators, and then we observe the correlation between the indicators. The last stage considers simple linear regression models, with shadow economy as the independent variable and environmental proxies as dependent variables.

Significance/Implications/Conclusions: Our research found that the evolution of the shadow economy is on a downtrend, considering that the fight against corruption developed after the 2009 financial crisis and especially after the Euro crisis 2014. Countries such as Romania, Bulgaria, Italy, Portugal, and Spain have the highest shadow economy due to their political electorate’s constant mismanagement and low credibility. On the contrary, countries such as Hungary, Estonia, and Lithuania have a low shadow economy.

Limitations: The reliance on limited data and the models applied.

Future Research: Future studies could expand the analysis by incorporating additional indicators, considering other econometric models, and incorporating more comprehensive and up-to-date data.

Details

Green Wealth: Navigating towards a Sustainable Future
Type: Book
ISBN: 978-1-83662-218-5

Keywords

Access Restricted. View access options
Article
Publication date: 8 July 2024

Stanislaus Lobo, Dasun Nirmala Malaarachchi, Premaratne Samaranayake, Arun Elias and Pei-Lee Teh

The purpose of this study is to investigate the influence of design for lean six sigma (DFLSS) on operational functions of the innovation management model by appraising an…

152

Abstract

Purpose

The purpose of this study is to investigate the influence of design for lean six sigma (DFLSS) on operational functions of the innovation management model by appraising an innovation management assessment framework.

Design/methodology/approach

An empirical approach for evaluating causal relationships among various constructs in the model phases that identify optimum pathways in achieving commercial success was adopted. A quantitative analysis of survey data were collected from large, medium and small organiations, including incubators in ANZ (Australia, New Zealand) and TMSV (Thailand, Malaysia, Sri Lanka and Vietnam).

Findings

The structural equation modelling recursive path analysis results of the model provide empirical evidence and pathways through the various constructs considered in the model. All these pathways lead to delivering optimum commercialization success (CS). Furthermore, DFLSS is confirmed as an enabler and has direct one-to-one and indirect influence on all the operational function constructs of the model including commercial success.

Research limitations/implications

This study had a relatively small sample size of completed responses obtained from the population and a constrained ability to compare commercialization success (CS) between the two regions in the dataset. Future studies could be conducted on a global scale to increase responses.

Practical implications

The research findings enabled the development of important and practical guidelines for managers and innovation practitioners engaged in planning and management of innovation.

Originality/value

This research offers a holistic approach for integrating DFLSS with stage gate phases of innovation management assessment framework, supported by empirical evidence, to aid organizations in effectively managing the innovation process and achieving greater success in commercialization.

Details

Benchmarking: An International Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1463-5771

Keywords

Access Restricted. View access options
Article
Publication date: 28 September 2012

D. Piliposyan

The purpose of this paper is to investigate the problem of the existence and propagation of a surface SH wave at the interface of two magneto‐electro‐elastic half‐spaces.

231

Abstract

Purpose

The purpose of this paper is to investigate the problem of the existence and propagation of a surface SH wave at the interface of two magneto‐electro‐elastic half‐spaces.

Design/methodology/approach

Equations of motions for magneto‐electro‐elastic materials have been used with coupling between mechanical, electric and magnetic fields. The problem is solved for four different sets of boundary conditions.

Findings

The results show that, for appropriate choice of material parameters, a non dispersive surface wave can propagate at the interface of these media. The existence condition is easier to satisfy for an electrically closed contact or no electromagnetic contact between two half‐spaces. The existence conditions can be easily satisfied for all four sets of boundary conditions if the two half‐spaces have their main symmetry axis, both parallel to the interface and perpendicular to the propagation direction, directed in the opposite directions. In this case the SH surface wave can always propagate if the two media are identical.

Originality/value

The magneto‐electric coupling effect has extensive applications, for example in electronic packaging, acoustic devices and medical ultrasonic imaging. The results of this paper give better understanding of the effects of the boundary conditions on the propagation of SH surface waves in magneto‐electro‐elastic materials.

Details

Multidiscipline Modeling in Materials and Structures, vol. 8 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Access Restricted. View access options

Abstract

Details

Intellectual Disability Nursing: An Oral History Project
Type: Book
ISBN: 978-1-83982-152-3

1 – 10 of 698
Per page
102050