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Open Access
Article
Publication date: 10 June 2019

Michele Loi, Markus Christen, Nadine Kleine and Karsten Weber

Cybersecurity in healthcare has become an urgent matter in recent years due to various malicious attacks on hospitals and other parts of the healthcare infrastructure. The purpose…

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Abstract

Purpose

Cybersecurity in healthcare has become an urgent matter in recent years due to various malicious attacks on hospitals and other parts of the healthcare infrastructure. The purpose of this paper is to provide an outline of how core values of the health systems, such as the principles of biomedical ethics, are in a supportive or conflicting relation to cybersecurity.

Design/methodology/approach

This paper claims that it is possible to map the desiderata relevant to cybersecurity onto the four principles of medical ethics, i.e. beneficence, non-maleficence, autonomy and justice, and explore value conflicts in that way.

Findings

With respect to the question of how these principles should be balanced, there are reasons to think that the priority of autonomy relative to beneficence and non-maleficence in contemporary medical ethics could be extended to value conflicts in health-related cybersecurity.

Research limitations/implications

However, the tension between autonomy and justice, which relates to the desideratum of usability of information and communication technology systems, cannot be ignored even if one assumes that respect for autonomy should take priority over other moral concerns.

Originality/value

In terms of value conflicts, most discussions in healthcare deal with the conflict of balancing efficiency and privacy given the sensible nature of health information. In this paper, the authors provide a broader and more detailed outline.

Details

Journal of Information, Communication and Ethics in Society, vol. 17 no. 2
Type: Research Article
ISSN: 1477-996X

Keywords

Abstract

Details

The Emerald Handbook of Computer-Mediated Communication and Social Media
Type: Book
ISBN: 978-1-80071-598-1

Content available
Article
Publication date: 4 September 2019

Marty J. Wolf, Alexis M. Elder and Gosia Plotka

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Abstract

Details

Journal of Information, Communication and Ethics in Society, vol. 17 no. 2
Type: Research Article
ISSN: 1477-996X

Article
Publication date: 21 January 2022

Christoph Jörgens and Markus Clemens

In high voltage direct current cable systems, cable joints are known as the least reliable components due to the use of multiple dielectrics. Resulting from the electric field and…

Abstract

Purpose

In high voltage direct current cable systems, cable joints are known as the least reliable components due to the use of multiple dielectrics. Resulting from the electric field and temperature depending conductivity of the different dielectrics, field enhancement at critical areas, e.g. triple points, may result in accelerated aging and the failure of the component. To reduce the stress, different field grading techniques are applied. The purpose of this study is to investigate different grading techniques for cable joints. Different shapes of the electrode and a varying nonlinear conductivity of field grading materials (FGM) are used for the simulation of the electric field.

Design/methodology/approach

Coupled electro-thermal field simulations are applied for different joint geometries, to obtain the stationary electric field. Electric field simulations in cable joint using geometric and nonlinear field grading techniques are shown.

Findings

Using the geometric field grading, the shape of the stress cone determines the field values in critical areas (triple points). High stress reduction is obtained for a certain curvature of the stress cone. For the nonlinear stress control, materials with a higher conductivity in comparison to the cable and the joint material are used. A field reduction is obtained by increasing the total conductivity. On the other hand, this is also increasing the insulation losses within the total FGM. More applicable is the decrease of the switching field or the increase of nonlinearity, which is only locally increase the conductivity and the insulation losses. Furthermore, simulations results show that an approximately constant field reduction is obtained, if the nonlinearity is above a certain threshold.

Research limitations/implications

This study is restricted to a field dependency of FGM only. For impulse voltages, high temperature and electric conductivity values my result in a thermal runaway. Furthermore, only direct current field grading techniques are studied.

Originality/value

The field grading of cable joints, using geometric and nonlinear techniques, is analyzed. A comparison between the electric field, by varying the curvature of the ground stress cone or the FGM conductivity constants in a complex joint geometry is novel. With its effect on the electric fields, general requirements for the geometry (geometric field grading) or the values of the FGM constants (nonlinear field grading) are defined to obtain a sufficient field grading.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 41 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 15 November 2011

Daniel Watzenig, Markus Neumayer and Colin Fox

The purpose of this paper is to establish a cheap but accurate approximation of the forward map in electrical capacitance tomography in order to approach robust real‐time…

Abstract

Purpose

The purpose of this paper is to establish a cheap but accurate approximation of the forward map in electrical capacitance tomography in order to approach robust real‐time inversion in the framework of Bayesian statistics based on Markov chain Monte Carlo (MCMC) sampling.

Design/methodology/approach

Existing formulations and methods to reduce the order of the forward model with focus on electrical tomography are reviewed and compared. In this work, the problem of fast and robust estimation of shape and position of non‐conducting inclusions in an otherwise uniform background is considered. The boundary of the inclusion is represented implicitly using an appropriate interpolation strategy based on radial basis functions. The inverse problem is formulated as Bayesian inference, with MCMC sampling used to efficiently explore the posterior distribution. An affine approximation to the forward map built over the state space is introduced to significantly reduce the reconstruction time, while maintaining spatial accuracy. It is shown that the proposed approximation is unbiased and the variance of the introduced additional model error is even smaller than the measurement error of the tomography instrumentation. Numerical examples are presented, avoiding all inverse crimes.

Findings

Provides a consistent formulation of the affine approximation with application to imaging of binary mixtures in electrical tomography using MCMC sampling with Metropolis‐Hastings‐Green dynamics.

Practical implications

The proposed cheap approximation indicates that accurate real‐time inversion of capacitance data using statistical inversion is possible.

Originality/value

The proposed approach demonstrates that a tolerably small increase in posterior uncertainty of relevant parameters, e.g. inclusion area and contour shape, is traded for a huge reduction in computing time without introducing bias in estimates. Furthermore, the proposed framework – approximated forward map combined with statistical inversion – can be applied to all kinds of soft‐field tomography problems.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 30 no. 6
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 16 August 2019

Xu Song and Cindy T. Christen

Live chat e-service provides a communication platform for online customers to make information inquiries and receive instantaneous assistance from a service representative. It is…

Abstract

Purpose

Live chat e-service provides a communication platform for online customers to make information inquiries and receive instantaneous assistance from a service representative. It is important for organizations to explore ways to improve their live chat e-service. The purpose of this paper is to propose a new organization–customer communication model (Schema Resonance Model), explicate how schema resonance can be achieved in live chat e-service, and investigate the impact of schema resonance on live chat e-service effectiveness, efficiency, customer satisfaction and intention of continued use.

Design/methodology/approach

A post-test only, between-subjects experiment was conducted. A total of 409 participants completed the experiment sessions, and 389 of these participants were used in the analysis.

Findings

Research results suggest schema resonance could improve the time efficiency of the live chat e-service while maintaining e-service effectiveness. Schema resonance could increase customer satisfaction with the overall e-service, the communication approach used by the representative and the information provided.

Research limitations/implications

Because a convenience sample was used in the experiment, results cannot be generalized to all live chat e-service users. Future research should include observation of real-world organization–customer live chat e-service sessions.

Practical implications

Organizations can consider applying the Schema Resonance Model in live chat e-service practices to enhance customer satisfaction and increase representatives’ service productivity.

Originality/value

This research proposes and tests a new organization–customer communication model to explore how organizations can improve live chat e-service in response to customers’ information inquiries.

Details

Journal of Service Theory and Practice, vol. 29 no. 3
Type: Research Article
ISSN: 2055-6225

Keywords

Article
Publication date: 25 July 2019

Fotios Kasolis and Markus Clemens

This paper aims to develop an automated domain decomposition strategy that is based on the presence of nonlinear field grading material, in the context of model order reduction…

Abstract

Purpose

This paper aims to develop an automated domain decomposition strategy that is based on the presence of nonlinear field grading material, in the context of model order reduction for transient strongly nonlinear electro-quasistatic (EQS) field problems.

Design/methodology/approach

The paper provides convincing empirical insights to support the proposed domain decomposition algorithm, a numerical investigation of the performance of the algorithm for different snapshots and model order reduction experiments.

Findings

The proposed method successfully decomposes the computational domain, while the resulting reduced models are highly accurate. Further, the algorithm is computationally efficient and robust, while it can be embedded in black-box model reduction implementations.

Originality/value

This paper fulfills the demand to effectively perform model order reduction for transient strongly nonlinear EQS field problems.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 38 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 20 August 2018

Christoph Jörgens and Markus Clemens

In high voltage direct current (HVDC), power cables heat is generated inside the conductor and the insulation during operation. A higher amount of the generated heat in comparison…

Abstract

Purpose

In high voltage direct current (HVDC), power cables heat is generated inside the conductor and the insulation during operation. A higher amount of the generated heat in comparison to the dissipated one, results in a possible thermal breakdown. The accumulation of space charges inside the insulation results in an electric field that contributes to the geometric electric field, which comes from the applied voltage. The total electric field decreases in the vicinity of the conductor, while it increases near the sheath, causing a possible change of the breakdown voltage.

Design/methodology/approach

Here, the thermal breakdown is studied, also incorporating the presence of space charges. For a developed electro-thermal HVDC cable model, at different temperatures, the breakdown voltage is computed through numerical simulations.

Findings

The simulation results show a dependence of the breakdown voltage on the temperature at the location of the sheath. The results also show only limited influence of the space charges on the breakdown voltage.

Research limitations/implications

The study is restricted to one-dimensional problems, using radial symmetry of the cable, and does not include any aging or long-term effect of space charges. Such aging effect can locally increase the electric field, resulting in a reduced breakdown voltage.

Originality/value

A comparison of the breakdown voltage with and without space charges is novel. The chosen approach allows for the first time to assess the influence of space charges and field inversion on the thermal breakdown.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Abstract

Details

Mixed-Race in the US and UK: Comparing the Past, Present, and Future
Type: Book
ISBN: 978-1-78769-554-2

Article
Publication date: 12 March 2018

Marian Makkar and Sheau-Fen Yap

The purpose of this paper is to address the following questions: how do consumers construct meaning around their inconspicuous luxury fashion experiences? What desires do…

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Abstract

Purpose

The purpose of this paper is to address the following questions: how do consumers construct meaning around their inconspicuous luxury fashion experiences? What desires do inconspicuous consumers strive to fulfill? What sentiments do they associate with their inconspicuous luxury fashion consumption?

Design/methodology/approach

This exploratory research begins with a netnographic study of 11 online luxury blogs followed by in-depth interviews and home observations of ten luxury consumers with inconspicuous preferences in Dubai.

Findings

Inconspicuous choices are not simply for associative or dissociative motivations but several symbolic consumption schemas come into play. A typology of inconspicuous luxury fashion consumers has emerged: fashion influencers, trendsetters, fashion followers, and luxe conservatives.

Practical implications

The findings have potential to yield important managerial implications for fashion retailers and brand communications. The typology of inconspicuous consumers provides a basis for developing a more targeted relationship marketing program for luxury fashion brands.

Originality/value

This research advances luxury knowledge in fashion and consumer behavior research by unveiling how consumers construct meanings around their inconspicuous consumption. The typology developed in this study marks the starting point for further extensions to explore the complexities of inconspicuous luxury consumers, which are grounded in the roles they take on in society, how they plan their luxury consumption journey and how they eventually use these possessions for self-identification and communication to others.

Details

Journal of Fashion Marketing and Management: An International Journal, vol. 22 no. 1
Type: Research Article
ISSN: 1361-2026

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