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Article
Publication date: 8 January 2018

Hongjuan Yang, Lin Fu, Yanhua Liu, Weiji Qian and Bo Hu

This paper aims to investigate the delamination wear properties of a carbon strip in a carbon strip rubbing against a copper wire at the high-sliding speed (380 km/h) with…

Abstract

Purpose

This paper aims to investigate the delamination wear properties of a carbon strip in a carbon strip rubbing against a copper wire at the high-sliding speed (380 km/h) with or without electrical current.

Design/methodology/approach

The friction and wear properties of a carbon strip in a carbon strip rubbing against a copper wire are tested on the high-speed wear tester whose speed can reach up to 400 km/h. The test data have been collected by the high-speed data collector. The worn surfaces of the carbon strip are observed by the scanning electron microscope.

Findings

It was found that there was a significant increase of the delamination wear with the decrease of the normal load when the electric current is applied. The size of the flake-like peeling also increases with the decrease of normal load. The delamination wear extends gradually from the edge of the erosion pits to the surrounding area with the decrease of the normal load. However, the delamination wear never appears in the absence of electric current. It is proposed that the decreased normal load and the big electrical current are the major causes of the delamination wear of the carbon strip.

Originality value

The experimental test at high-sliding speed of 380 km/h was performed for the first time, and the major cause of the delamination was discovered in this paper.

Details

Industrial Lubrication and Tribology, vol. 70 no. 1
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 1 August 2006

Yaodong Cui

To provide an algorithm for the two‐dimensional guillotine‐cutting problem of punched strips.

Abstract

Purpose

To provide an algorithm for the two‐dimensional guillotine‐cutting problem of punched strips.

Design/methodology/approach

It is assumed that the stock sheet is cut into blanks in two stages. First a guillotine shear cuts the sheet into strips, and then a stamping press punches out the blanks from the strips. To generate good strip layout, the sheet is divided into two segments with an orthogonal cut. Each segment consists of strips in the same direction. The strip directions of the two segments are perpendicular to each other. A recursion function is established to determine the optimal strip layouts on segments of different lengths. All possible segment lengths are considered either explicitly or implicitly. Two segments of different strip directions are selected optimally to compose the final cutting pattern.

Findings

A strip can be taken as consisting of rectangular pieces, where the length of the first piece may be longer than that of the others. Normal lengths and widths can be defined according to the properties of punched strips. Considering only normal segment lengths and using lower bound in the recursion function can reduce the computation time drastically.

Practical implications

Based on the algorithm, practitioners may develop applications to solve real world two‐dimensional cutting problem of punched strips.

Originality/value

The two‐segment cutting patterns for punched strips are proposed. They are simple to cut and may be welcomed in practice.

Details

Engineering Computations, vol. 23 no. 6
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 February 1988

B. Suárez, J. Miquel Canet and E. Oñate

A unified approach for the vibration analysis of curved or straight prismatic plates and bridges and axisymmetric shells using a finite strip method based in…

Abstract

A unified approach for the vibration analysis of curved or straight prismatic plates and bridges and axisymmetric shells using a finite strip method based in Reissner—Mindlin shell theory is presented. Details of obtaining all relevant strip matrices and vectors are given. It is also shown how the use of the simple linear two node strip with reduced integration leads to direct explicit forms of all relevant matrices. Examples of application which show the accuracy of the linear strip for free vibration analysis of structures are presented.

Details

Engineering Computations, vol. 5 no. 2
Type: Research Article
ISSN: 0264-4401

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Book part
Publication date: 10 October 2014

Tom Daems

This chapter reconstructs and critically examines the recent history of strip searches in Belgium. About 10 years ago the Belgian parliament adopted its first law on…

Abstract

Purpose

This chapter reconstructs and critically examines the recent history of strip searches in Belgium. About 10 years ago the Belgian parliament adopted its first law on prisoners’ rights. A major part of the Prison Act of 12 January 2005 deals with disciplinary and control measures. Article 108, in particular, has provoked quite some controversy. It introduced a clear distinction between the (more superficial) search of an inmates’ clothes on the one hand, and the (substantially more intrusive) measure of strip searching on the other hand. The main difference between these two measures is that the latter involves forcing prisoners to strip naked. Because of their intrinsic intrusiveness, such strip searches were meant to be exceptional measures: they should only take place following an individual assessment and decision by the prison governor. In practice, however, the prison administration tended to interpret Article 108 somewhat differently and the line between searching an inmate’s clothes on the one hand and strip searching on the other became blurred.

Design/methodology/approach

I first discuss the problem of order in prisons and explore how strip searches have been regulated in Europe. I then reconstruct the recent history of the regulation of strip searches in Belgium. In order to make sense of this history, I mobilize some of the ideas of Stanley Cohen’s sociology of denial, in particular, his distinction between literal, implicatory and interpretive denial, and apply these to the history of strip searches in Belgium.

Findings

A consistent finding from this chapter is that the Belgian prison administration has – through creative manoeuvres of interpretive denial – been able to circumvent the new barriers that were erected by the Prison Act of 12 January 2005 and, in doing so, it has been able to continue stripping detainees naked without an individualized decision from the prison governor. The approach that I develop throughout this chapter helps us better appreciate the limits of legal reform and top-down (European) regulation of strip searches.

Originality/value

The chapter demonstrates that Stanley Cohen’s work on denial is not only useful for scholars who do research on gross human rights violations but also for interpreting more down-to-earth aspects of criminal justice systems across the globe.

Details

Punishment and Incarceration: A Global Perspective
Type: Book
ISBN: 978-1-78350-907-2

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Article
Publication date: 19 February 2020

Yu-Ting L.V., Yong Li, De-Xing Yang, Zhenhua Bai, Jinlong Li and Rui Wang

Continuous annealing (CA) units usually lack a physical shapemeter; consequently, real-time display and closed-loop control of the strip shape are impossible to achieve.

Abstract

Purpose

Continuous annealing (CA) units usually lack a physical shapemeter; consequently, real-time display and closed-loop control of the strip shape are impossible to achieve.

Design/methodology/approach

A shape model for the CA process is established in this study. Specifically, a virtual shapemeter and closed-loop control system based on the advanced parameter acquisition system and information transmission of CA units are developed in C++ programming language. This system realises real-time dynamic shape display, closed-loop control and shape prediction by collecting raw data of steel coils and parameters during CA.

Findings

Field test results show that the shape predicted by the virtual shapemeter coincides with the measured shape by over 90 per cent, which fully meets the precision requirement of industrial applications.

Originality/value

Moreover, shape quality is effectively improved without increasing hardware investments.

Details

Engineering Computations, vol. 37 no. 6
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 4 May 2020

Song Xiao, Yuanpei Luo, Jingchi Wu, Can Zhang, Yang Rao, Guangning Wu and Jan Sykulski

In high-speed trains, the energy is supplied from a high voltage catenary to the vehicle via a pantograph catenary system (PCS). Carbon pantograph strips must maintain…

Abstract

Purpose

In high-speed trains, the energy is supplied from a high voltage catenary to the vehicle via a pantograph catenary system (PCS). Carbon pantograph strips must maintain continuous contact with the wire to ensure safety and reliability. The contact is often confined to a particular spot, resulting in excessive wear due to mechanical and thermal damage, exacerbated by the presence of an electric arc and associated electrochemical corrosion. The effectiveness and reliability of the PCS impacts on the performance and safety of HSTs, especially under high-speed conditions. To alleviate some of these adverse effects, this paper aims to propose a configuration where a circular PCS replaces the currently used pantograph strips.

Design/methodology/approach

Two dynamic multi-physics models of a traditional PCS with a carbon strip and a novel PCS with a circular pantograph strip catenary system are established, and the electrical and mechanical characteristics of these two systems are compared. Moreover, a PCS experimental platform is designed to verify the validity and accuracy of the multi-physics model.

Findings

A novel circular pantograph system is proposed in this paper to alleviate some of the shortcomings of the traditional PCS. Comparing with a traditional PCS, the circular PCS exhibits superior performance in both electromagnetic and thermal aspects.

Originality/value

The paper offers a new technical solution to the PCS and develops a dedicated multi-physics model for analysis and performance prediction with the aim to improve the performance of the PCS. The new system offers numerous benefits, such as less friction heat, better heat dispersion and improved catenary-tracking performance.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 40 no. 2
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 4 November 2014

Vaughan Reimers and Fred Chao

The purpose of this study is to determine the role of convenience in a recreational shopping trip. In an effort to address the shopping strip’s forfeiture of market share…

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Abstract

Purpose

The purpose of this study is to determine the role of convenience in a recreational shopping trip. In an effort to address the shopping strip’s forfeiture of market share to the mall and the Internet, retail planners have utilised a variety of intervention strategies. One such strategy is to differentiate the strip by emphasising its hedonic attributes. An often overlooked alternative is to compete with both of these formats in a key area of competitive disadvantage – convenience. Whereas these two alternatives have traditionally been regarded as separate strategies, this study examines whether convenience actually serves as a source of satisfaction in a hedonic shopping context.

Design/methodology/approach

A recreational shopping trip to a shopping strip (also referred to as Main Street or the High Street) in Melbourne, Australia, served as the context for this study. The study used a quantitative survey approach to collect its data and structural equation modelling to analyse it.

Findings

Surprisingly, the hedonic attributes of a shopping strip do not influence trip satisfaction in the context of a recreational shopping strip. Contrary to a significant body of academic research, it is instead the time-saving and distance-minimising properties of a shopping strip, as well as its overall convenience, which determine satisfaction.

Originality/value

The results have important implications for Town Centre Management schemes because they suggest that responsibility for providing a hedonic shopping experience rests with its individual retailers. Instead, the role of strip planners is to facilitate the other side of the value-equation by minimising the hassles involved in strip shopping. The results of this study also question the traditional belief that hedonic- and convenience-based rejuvenation strategies should be treated as two distinct strategies. Instead, convenience should be regarded as a prerequisite to a satisfying recreational shopping trip.

Details

European Journal of Marketing, vol. 48 no. 11/12
Type: Research Article
ISSN: 0309-0566

Keywords

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Article
Publication date: 9 August 2019

Chun-Jian Su, Yong Li, De-Xing Yang, Zhen-Hua Bai, Rui Wang, Yu-Ting Lv and Jian-Gao Duan

The purpose of this study is to solve the key problem of the residual stress of strip in buckling and deviation during the continuous annealing process (CAP).

Abstract

Purpose

The purpose of this study is to solve the key problem of the residual stress of strip in buckling and deviation during the continuous annealing process (CAP).

Design/methodology/approach

Considering the one-to-one correspondence between deformation and residual stress, the strip was divided into multiple elements. To obtain the total deformation of each element, the influence model of some factors on the deformation of steel strip element was established. Then, according to the constitutive equation of residual stress and deformation, and the deformation coordination relation between strip elements, a set of calculation model, which is suitable for residual stress of strip during CAP was established, the model precision was verified by finite element method simulation, and the influences on residual stress of strip were also analyzed.

Findings

The weighted calculation of comparison between analytical results and simulation shows that the accuracy of the analytical method is within 10 per cent, which fully meets the requirements.

Originality/value

The different residual stress of steel strip can be displayed quickly and intuitively in the synchronous process segment according to this model, which is of great importance to the prevention of strip buckling and deviation.

Details

Engineering Computations, vol. 37 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 June 2000

P.Di Barba

Introduces the fourth and final chapter of the ISEF 1999 Proceedings by stating electric and magnetic fields are influenced, in a reciprocal way, by thermal and mechanical…

Abstract

Introduces the fourth and final chapter of the ISEF 1999 Proceedings by stating electric and magnetic fields are influenced, in a reciprocal way, by thermal and mechanical fields. Looks at the coupling of fields in a device or a system as a prescribed effect. Points out that there are 12 contributions included ‐ covering magnetic levitation or induction heating, superconducting devices and possible effects to the human body due to electric impressed fields.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 19 no. 2
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 4 January 2011

Kim Klarskov Jeppesen and Ulrik Gorm Møller

The purpose of this paper is to document a Danish fraud scheme, in which a large number of limited companies were stripped of their assets leaving them with nothing but…

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1326

Abstract

Purpose

The purpose of this paper is to document a Danish fraud scheme, in which a large number of limited companies were stripped of their assets leaving them with nothing but tax debt, eventually causing the Danish Tax and Customs Administration to lose large sums. Furthermore, the purpose is to analyse why the asset‐stripping schemes occurred in a mature market economy with a strong corporate governance system and a low level of corruption.

Design/methodology/approach

The research is conducted as a longitudinal single case study based on documentary research.

Findings

The Danish case indicates that asset stripping may take place in mature market economies to the extent that perpetrators are able to circumvent the corporate governance system by giving lawyers, public accountants and banks incentives to act less critically towards dubious business transactions.

Research limitations/implications

The opportunity and rationalisations supporting the fraud are particular to the Danish context.

Practical implications

The paper provides insights into the consequences of professionals disregarding their duty to serve the public interest.

Social implications

The paper provides an example on how to circumvent the social supervisory system of a mature market economy.

Originality/value

The paper contributes to the knowledge about asset stripping by documenting and analysing the phenomenon in a mature market economy context.

Details

Journal of Financial Crime, vol. 18 no. 1
Type: Research Article
ISSN: 1359-0790

Keywords

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