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1 – 10 of 390
Article
Publication date: 1 June 2002

M. Engelhardt, P. Skipworth, D.A. Savic, A. Cashman, G.A. Walters and A.J. Saul

A whole life costing (WLC) methodology has been developed for determining long term maintenance expenditure requirements for water distribution networks. The methodology utilises…

1275

Abstract

A whole life costing (WLC) methodology has been developed for determining long term maintenance expenditure requirements for water distribution networks. The methodology utilises an accounting scheme that ties the costs incurred by the operator and other stakeholders to the attributes or performance that drive the costs. It has specifically been derived with the requirements placed by the regulatory regime on the water companies that operate in England and Wales in mind. Expenditure constraints are implied by the regulator through price caps that companies can charge their customers. Appropriate levels of expenditures included as part of the price cap determinations are required by the regulator to be economically robust and tied to the service received by the customers. Therefore, maintenance decisions must reflect more immediate concerns of meeting performance requirements, but must ensure that such levels are sustainable in the long term. The WLC methodology achieves this through an integrated platform that links costs identified within a structured accounting scheme with their performance based drivers commonly modelled based on historical data. Thus, a robust and fully auditable methodology is provided that can address the requirements of all stakeholders. This methodology is the basis for software (WiLCO) that provides decision support in determining appropriate pipe rehabilitation and operational strategy and thus expenditure levels over extended time horizons.

Details

Journal of Quality in Maintenance Engineering, vol. 8 no. 2
Type: Research Article
ISSN: 1355-2511

Keywords

Book part
Publication date: 24 August 2021

Andreas Masouras, Victoria Pistikou and Marcos Komodromos

In this chapter, we approach and examine the issue of innovation as applied to family and small and medium-sized enterprises (SMEs) in Cyprus, using, for research purposes, a…

Abstract

In this chapter, we approach and examine the issue of innovation as applied to family and small and medium-sized enterprises (SMEs) in Cyprus, using, for research purposes, a structured questionnaire addressed to the particular type of business through mapping and grouping of the sample. The analysis concerns the periods 2015–2017, which are interesting due to the economic conditions that prevailed in the market in general. In this chapter, innovation is analyzed at both the policy level of the European Union and the institutional level. In particular, we examine the institutional dimensions of innovation in SMEs in Cyprus, such as, for example, the issue of financing, as well as the barriers often encountered by the companies in implementing innovative products, services or solutions. The chapter ends with interesting conclusions and an attempt to discuss future research extensions in the field of the institutional analysis of innovation.

Details

Entrepreneurship, Institutional Framework and Support Mechanisms in the EU
Type: Book
ISBN: 978-1-83909-982-3

Keywords

Article
Publication date: 22 June 2017

Sana El Kalash and Elie Hantouche

This paper aims at developing a mechanical-based model for predicting the thermally induced axial forces and rotation of steel top and seat angles connections with and without web…

Abstract

Purpose

This paper aims at developing a mechanical-based model for predicting the thermally induced axial forces and rotation of steel top and seat angles connections with and without web angles subjected to elevated temperatures due to fire. Finite element (FE) simulations and experimental results are used to develop the mechanical model.

Design/methodology/approach

The model incorporates the overall connection and column-beam rotation of key component elements, and includes nonlinear behavior of bolts and base materials at elevated temperatures and some major geometric parameters that impact the behavior of such connections when exposed to fire. This includes load ratio, beam length, angle thickness, and gap distance. The mechanical model consists of multi-linear and nonlinear springs that predict each component stiffness, strength, and rotation.

Findings

The capability of the FE model to predict the strength of top and seat angles under fire loading was validated against full scale tests. Moreover, failure modes, temperature at failure, maximum compressive axial force, maximum rotation, and effect of web angles were all determined in the parametric study. Finally, the proposed mechanical model was validated against experimental results available in the literature and FE simulations developed as a part of this study.

Originality/value

The proposed model provides important insights into fire-induced axial forces and rotations and their implications on the design of steel bolted top and seat angle connections. The originality of the proposed mechanical model is that it requires low computational effort and can be used in more advanced modelling applications for fire analysis and design.

Details

Journal of Structural Fire Engineering, vol. 8 no. 3
Type: Research Article
ISSN: 2040-2317

Keywords

Article
Publication date: 13 June 2019

Karim Al Khatib, Elie Hantouche and Mohammed Ali Morovat

This study aims to investigate the thermal creep behavior of steel frame assemblies with shear tab connections subjected to transient-state fire temperatures. Different key…

Abstract

Purpose

This study aims to investigate the thermal creep behavior of steel frame assemblies with shear tab connections subjected to transient-state fire temperatures. Different key parameters are investigated to study their effect on the global response of the steel frames in fire.

Design/methodology/approach

Finite element (FE) models of connection assemblies are first analyzed using Abaqus under transient-state temperature conditions and validated against experimental work available in the literature. Upon acquiring the validated conditions, parametric studies are carried out to study the effect of key geometric and heating parameters on the overall response of the frame assembly to fire temperatures. Thermal creep material is also incorporated in the analyses through a user-defined subroutine, and a comparison between including and excluding creep material is illustrated to show the effect of thermal creep on the structural behavior.

Findings

The results reported herein indicate that having a rigid column increases the thermal-induced axial forces, thus increasing the development of thermal creep strains. Slow heating rates can cause axial stress relaxation in the restrained beam and increase the mid-span deflection and consequently the development of beam catenary action. The results also show that reaching higher initial cooling temperatures and having longer cooling phase durations result in more tensile forces at the end of the cooling phase.

Originality/value

Previous studies were limited to isolated steel connections under steady-state conditions. This study investigates the creep behavior of shear tab connection assemblies under transient-state conditions of fire when creep effects are explicitly considered. This can provide a rational and realistic assessment of the steel behavior in fire events.

Details

Journal of Structural Fire Engineering, vol. 10 no. 3
Type: Research Article
ISSN: 2040-2317

Keywords

Article
Publication date: 27 March 2009

Jackie Jones

The purpose of this paper is to assess the likelihood of successfully introducing constitutional changes to the definition of marriage in Germany.

Abstract

Purpose

The purpose of this paper is to assess the likelihood of successfully introducing constitutional changes to the definition of marriage in Germany.

Design/methodology/approach

The paper examines the values underpinning the German constitution through academic writing and case law.

Findings

Fundamental change is unlikely to occur in the foreseeable future, despite EU case law.

Research limitations/implications

Incremental changes have taken place in all countries. These have begun in the workplace and spread to more fundamental areas such as challenges to marriage definitions in many countries. In a conservative country such as Germany the fact that even the highest constitutional court has come close to opening the door to change can be interpreted to mean the wait will not be too long.

Originality/value

The paper provides a comparative analysis that will highlight the types of arguments that have been successfully pushed through the courts as well as persuading political actors to enact positive legislation.

Details

Equal Opportunities International, vol. 28 no. 3
Type: Research Article
ISSN: 0261-0159

Keywords

Article
Publication date: 12 May 2020

Meike Engelhardt, Michał Kosiedowski and Irena Duszyńska

The purpose of this study is to examine in what type of scenarios of daily life assistive technology such as the INSENSION system would provide considerable benefit for people…

Abstract

Purpose

The purpose of this study is to examine in what type of scenarios of daily life assistive technology such as the INSENSION system would provide considerable benefit for people with profound intellectual and multiple disabilities (PIMD).

Design/methodology/approach

A series of focus group workshops were held with relatives of people with PIMD and direct support professionals (DSPs), as well as experts in information and communications technology (ICT). They were oriented towards the design thinking approach and moderated as per the Disney method.

Findings

The participants identified transitions from known to unknown caregivers, provision of care during the night and the impact of external factors on a person’s mood as challenging situations within the PIMD context.

Practical implications

Solving these problems would lead to considerable benefits to the affected people. Based on the ideas gathered in workshops, three technological applications for the INSENSION system were derived, i.e. communication application, multimedia player and smart room devices, all of which will provide remedies in specific usage scenarios.

Originality/value

Methods drawing on the participant’s creativity in combination with the workshops’ multi-perspectivity facilitated a direct reference to the daily life of the target group. In this manner, the innovative ICT system INSENSION can be oriented towards the requirements of this vulnerable group.

Details

Journal of Enabling Technologies, vol. 14 no. 2
Type: Research Article
ISSN: 2398-6263

Keywords

Book part
Publication date: 20 December 2017

Kristoffer Edelgaard Christensen

Against the grain of the paradigmatic postcolonial analytics of the colonial state, this chapter presents a non-dichotomous comparison of two regimes within the late 18th century…

Abstract

Against the grain of the paradigmatic postcolonial analytics of the colonial state, this chapter presents a non-dichotomous comparison of two regimes within the late 18th century Danish empire, which are commonly presumed to be of essentially different kinds – namely the colonial state in Tranquebar in South East India and the metropolitan government of rural Danish society. By focusing, firstly, on practices of policing and, secondly, on the general technology of power that targeted these significantly different socio-political spheres, it is argued that these regimes were governing according to similar strategies: seeking, on one hand, to deploy societal mechanisms of self-regulation and, on the other, to provide a balance and order to the otherwise chaotic forces of the population. On the basis of a Foucauldian vocabulary of government, it is thereby argued that colonialism, at this time and place, had not yet clearly constituted itself as a particular form of rule.

Details

Rethinking the Colonial State
Type: Book
ISBN: 978-1-78714-655-6

Keywords

Article
Publication date: 14 December 2021

Fuminobu Ozaki and Takumi Umemura

In this study, the bending strength, flexural buckling strength and collapse temperature of small steel specimens with rectangular cross-sections were examined by steady and…

Abstract

Purpose

In this study, the bending strength, flexural buckling strength and collapse temperature of small steel specimens with rectangular cross-sections were examined by steady and transient state tests with various heating and deformation rates.

Design/methodology/approach

The engineering stress and strain relationships for Japan industrial standard (JIS) SN400 B mild steels at elevated temperatures were obtained by coupon tests under three strain rates. A bending test using a simple supported small beam specimen was conducted to examine the effects of the deformation rates on the centre deflection under steady-state conditions and the heating rates under transient state conditions. Flexural buckling tests using the same cross-section specimen as that used in the bending test were conducted under steady-state and transient-state conditions.

Findings

It was clarified that the bending strength and collapse temperature are evaluated by the full plastic moment using the effective strength when the strain is equal to 0.01 or 0.02 under fast strain rates (0.03 and 0.07 min–1). In contrast, the flexural buckling strength and collapse temperature are approximately evaluated by the buckling strength using the 0.002 offset yield strength under a slow strain rate (0.003 min–1).

Originality/value

Regarding both bending and flexural buckling strengths and collapse temperatures of steel members subjected to fire, the relationships among effects of steel strain rate for coupon test results, heating and deformation rates for the heated steel members were minutely investigated by the steady and transient-state tests at elevated temperatures.

Article
Publication date: 12 October 2010

Yograj Singh Duksh, Brajesh Kumar Kaushik, Sankar Sarkar and Raghuvir Singh

The purpose of this paper is to explore and evaluate the performance comparison of carbon nanotubes (CNT) and nickel silicide (NiSi) nanowires interconnects as prospective…

1405

Abstract

Purpose

The purpose of this paper is to explore and evaluate the performance comparison of carbon nanotubes (CNT) and nickel silicide (NiSi) nanowires interconnects as prospective alternatives to copper wire interconnects.

Design/methodology/approach

The increasing resistivity of the copper wire with scaling and rising demands on current density drives the need for identifying new wiring solutions. This paper explores the various alternatives to copper. The metallic bundle CNTs and NiSi nanowires are promising candidates that can potentially address the challenges faced by copper. This paper analyzes various electrical models of carbon nanotube and recently introduced novel interconnect solution using NiSi nanowires.

Findings

The theoretical studies proves CNTs and NiSi nanowires to be better alternatives against copper on the ground of performance parameters, such as effective current density, delay and power consumption. NiSi nanowire provides highest propagation speed for short wire length, and copper is the best for intermediate wire length, while bundle CNTs is faster for long wire length. NiSi nanowire has lowest power consumption than copper and CNTs.

Originality/value

This paper investigates, assess and compares the performance of carbon nanotubes (CNT) and NiSi nanowires interconnects as prospective alternatives to copper wire interconnects in future VLSI chips.

Details

Journal of Engineering, Design and Technology, vol. 8 no. 3
Type: Research Article
ISSN: 1726-0531

Keywords

Article
Publication date: 24 April 2007

Brajesh Kumar Kaushik, Saurabh Goel and Gaurav Rauthan

To review and explore optical fiber and carbon nanotube (CNT) as prospective alternatives to copper in VLSI interconnections.

1716

Abstract

Purpose

To review and explore optical fiber and carbon nanotube (CNT) as prospective alternatives to copper in VLSI interconnections.

Design/methodology/approach

As the technology moves to deep submicron level, the interconnect width also scales down. Increasing resistivity of copper with scaling and rising demands on current density drives the need for identifying new wiring solutions. This paper explores various alternatives to copper. Metallic CNTs, optical interconnects are promising candidates that can potentially address the challenges faced by copper.

Findings

Although, the theoretical aspects proves CNTs and optical interconnect to be better alternative against copper on the ground of performance parameters such as power dissipation, switching delay, crosstalk. But copper would last for coming decades on integration basis.

Originality/value

This paper reviews the state‐of‐the‐art in CNT interconnect and optical interconnect research; and discusses both the advantages and challenges of these emerging technologies.

Details

Microelectronics International, vol. 24 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

1 – 10 of 390