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Article
Publication date: 7 January 2020

Prerana Das, John Inge Asperheim, Bjørnar Grande, Thomas Petzold and Dietmar Hömberg

Quality of the weld joint produced by high-frequency induction (HFI) welding of steel tubes is attributed to a number of process parameters. There are several important process…

Abstract

Purpose

Quality of the weld joint produced by high-frequency induction (HFI) welding of steel tubes is attributed to a number of process parameters. There are several important process parameters such as the speed of the welding line, the angle of the approaching strip edges, the physical configuration of the induction coil, impeder, formed steel strip and weld rolls with respect to each other, the pressure of the weld rolls and frequency of the high-frequency current in the induction coil. The purpose of this paper is to develop a 3D model of tube welding process that incorporates realistic material properties and movement of the strip.

Design/methodology/approach

3D numerical simulation by the finite element method (FEM) can be used to understand the influence of these process parameters. In this study, the authors have developed a quasi-steady model along with the coupling of electromagnetic and thermal model and incorporation of non-linear electromagnetic and thermal material properties.

Findings

In this study, 3D FEM model has been established which gives results in accordance with previously published work on induction tube welding. The effect of the Vee-angle and frequency on the temperature profile created in the strip edge during the electromagnetic heating is studied.

Practical implications

The authors are now able to simulate the induction tube welding process at a more reasonable computational cost enabling an analysis of the process.

Originality/value

A 3D model has been developed for induction tube welding. A non-linearly coupled system of Maxwell’s electromagnetic equation and the heat equation is implemented using the fixed point iteration method. The model also takes into account non-linear magnetic and thermal material properties. Adaptive remeshing is implemented to optimise mesh size for the electrical skin depth of induced current in the strip. The model also accounts for the high welding-line speeds which influence the mode of heat transfer in the strip.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 39 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Book part
Publication date: 6 September 2023

Verena Tandrayen-Ragoobur

Climate change and the COVID-19 pandemic are complex and have multifaceted effects on countries in an unpredictable and unprecedented manner. While both COVID-19 and the climate…

Abstract

Climate change and the COVID-19 pandemic are complex and have multifaceted effects on countries in an unpredictable and unprecedented manner. While both COVID-19 and the climate crisis share similarities, they also have some notable differences. Being both systemic in nature with knock-on and cascading effects that propagate due to high connectedness of countries, COVID-19, however, presents imminent and directly visible dangers, while the risks from climate change are gradual, cumulative and often distributed dangers. Climate change has more significant medium and long-term impacts which are likely to worsen over time. There is no vaccine for climate change compared to COVID-19. In addition, those most affected by extreme climatic conditions have usually contributed the least to the root causes of the crisis. This is in fact the case of island economies. The chapter thus investigates into the vulnerability and resilience of 38 Small Islands Developing States (SIDs) to both shocks. Adopting a comprehensive conceptual framework and data on various indices from the literature and global databases, we assess the COVID-19 and climate change vulnerabilities of SIDs on multiple fronts. The results first reveal a higher vulnerability across all dimensions for the Pacific islands compared to the other islands in the sample. There is also evidence of a weak correlation between climate change risk and the COVID-19 pandemic confirming our premise that there are marked differences between these two shocks and their impacts on island communities.

Details

Achieving Net Zero
Type: Book
ISBN: 978-1-83753-803-4

Keywords

Open Access
Article
Publication date: 1 February 2022

Samuel Kvasnicka, Thomas Bauernfeind, Paul Baumgartner and Riccardo Torchio

The purpose of this paper is to show that the computation of time-periodic signals for coupled antenna-circuit problems can be substantially accelerated by means of the single…

Abstract

Purpose

The purpose of this paper is to show that the computation of time-periodic signals for coupled antenna-circuit problems can be substantially accelerated by means of the single shooting method. This allows an efficient analysis of nonlinearly loaded coupled loop antennas for near field communication (NFC) applications.

Design/methodology/approach

For the modelling of electrically small coupled field-circuit problems, the partial element equivalent circuit (PEEC) method shows to be very efficient. For analysing the circuit-like description of the coupled problem, this paper developed a generalised modified nodal analysis (MNA) and applied it to specific NFC problems.

Findings

It is shown that the periodic steady state (PSS) solution of the resulting differential-algebraic system can be computed very time efficiently by the single shooting method. A speedup of roughly 114 to conventional transient approaches can be achieved.

Practical implications

The proposed approach appears to be an efficient alternative for the computation of time PSS solutions for nonlinear circuit problems coupled with discretised conductive structures, where the homogeneous solution is not of interest.

Originality/value

The present paper explores the implementation and application of the shooting method for nonlinearly loaded coupled antenna-circuit problems based on the PEEC method and shows the efficiency of this approach.

Article
Publication date: 30 March 2012

Ingrid Burbey and Thomas L. Martin

Location‐prediction enables the next generation of location‐based applications. The purpose of this paper is to provide a historical summary of research in personal…

Abstract

Purpose

Location‐prediction enables the next generation of location‐based applications. The purpose of this paper is to provide a historical summary of research in personal location‐prediction. Location‐prediction began as a tool for network management, predicting the load on particular cellular towers or WiFi access points. With the increasing popularity of mobile devices, location‐prediction turned personal, predicting individuals' next locations given their current locations.

Design/methodology/approach

This paper includes an overview of prediction techniques and reviews several location‐prediction projects comparing the raw location data, feature extraction, choice of prediction algorithms and their results.

Findings

A new trend has emerged, that of employing additional context to improve or expand predictions. Incorporating temporal information enables location‐predictions farther out into the future. Appending place types or place names can improve predictions or develop prediction applications that could be used in any locale. Finally, the authors explore research into diverse types of context, such as people's personal contacts or health activities.

Originality/value

This overview provides a broad background for future research in prediction.

Details

International Journal of Pervasive Computing and Communications, vol. 8 no. 1
Type: Research Article
ISSN: 1742-7371

Keywords

Article
Publication date: 26 May 2023

Derrick Boakye, David Sarpong, Dirk Meissner and George Ofosu

Cyber-attacks that generate technical disruptions in organisational operations and damage the reputation of organisations have become all too common in the contemporary…

Abstract

Purpose

Cyber-attacks that generate technical disruptions in organisational operations and damage the reputation of organisations have become all too common in the contemporary organisation. This paper explores the reputation repair strategies undertaken by organisations in the event of becoming victims of cyber-attacks.

Design/methodology/approach

For developing the authors’ contribution in the context of the Internet service providers' industry, the authors draw on a qualitative case study of TalkTalk, a British telecommunications company providing business to business (B2B) and business to customer (B2C) Internet services, which was a victim of a “significant and sustained” cyber-attack in October 2015. Data for the enquiry is sourced from publicly available archival documents such as newspaper articles, press releases, podcasts and parliamentary hearings on the TalkTalk cyber-attack.

Findings

The findings suggest a dynamic interplay of technical and rhetorical responses in dealing with cyber-attacks. This plays out in the form of marshalling communication and mortification techniques, bolstering image and riding on leader reputation, which serially combine to strategically orchestrate reputational repair and stigma erasure in the event of a cyber-attack.

Originality/value

Analysing a prototypical case of an organisation in dire straits following a cyber-attack, the paper provides a systematic characterisation of the setting-in-motion of strategic responses to manage, revamp and ameliorate damaged reputation during cyber-attacks, which tend to negatively shape the evaluative perceptions of the organisation's salient audience.

Details

Information Technology & People, vol. 37 no. 4
Type: Research Article
ISSN: 0959-3845

Keywords

Book part
Publication date: 23 April 2021

Anthony Löwstedt

Purpose – It may be time to reformulate the rejection of censorship. Freedom is not the only opposite of, strategic resource against, or antidote to, censorship…

Abstract

Purpose – It may be time to reformulate the rejection of censorship. Freedom is not the only opposite of, strategic resource against, or antidote to, censorship. Methodology/Approach – This chapter argues against censorship with a Kantian-normative approach (the deontological position of the categorical imperative), using conceptual analysis, constructivism, and international legal scholarship, from the standpoint of a humanity-wide duty to safeguard and promote cultural diversity and biodiversity. Increasingly visible weaknesses of the argument against censorship from the utilitarian standpoint of freedom, a negative argument, can be avoided in this way. Findings – Especially the neoliberal approach to freedom has no provisions against corporate and only little against copyright censorship, which are both becoming increasingly acute. Diversity, on the other hand, both biological and cultural, is argued to be instrumentally good, and intrinsically good, but the latter only if balanced by equality of basic rights. Originality/Value – The resulting moral and legal imperatives are to support, safeguard, and promote diversity, and thus to minimize both censorship in culture and selection/elimination in nature, but only to minimize them, simply because they cannot themselves be eliminated. It is impossible to eliminate elimination. This becomes clear when one considers self- and soft censorship. At least in the wide sense, censorship is inevitable – but sustainable development is impossible without strict minimization of censorship.

Details

Media and Law: Between Free Speech and Censorship
Type: Book
ISBN: 978-1-80071-729-9

Keywords

Book part
Publication date: 25 October 2017

Ron Sanchez, Jeremy Galbreath and Gavin Nicholson

In this paper we develop a model for researching the influence that a board of directors can have on improving an organization’s sustainability performance. Our model explores…

Abstract

In this paper we develop a model for researching the influence that a board of directors can have on improving an organization’s sustainability performance. Our model explores sources of cognitive flexibility of boards needed to recognize and respond to the need for improved sustainability performance. We first define concepts of sustainability, sustainability competence, and sustainability performance. We then analyze two forms of board capital (a board’s human capital and its social capital) and three aspects of a board’s information processing (its patterns of information search, discussion and debate, and information absorption) that we suggest affect a board’s cognitive flexibility and thereby influence whether a board decides to adopt sustainability performance goals. Our model also suggests that an organization’s strategic flexibility – as represented by its current endowments of resource flexibilities and coordination flexibilities – will moderate the relationship between a board’s decision to adopt sustainability performance goals and an organization’s subsequent achievement of those goals. We also suggest that our model is generally relevant to any research seeking to predict the influence of boards on strategic change in many forms, not just to research focused on sustainability issues.

Details

Mid-Range Management Theory: Competence Perspectives on Modularity and Dynamic Capabilities
Type: Book
ISBN: 978-1-78714-404-0

Keywords

Book part
Publication date: 18 April 2016

Andrea Tomo, Danila Scarozza, Alessandro Hinna, Ernesto De Nito and Gianluigi Mangia

The study aims to contribute to the literature on board behavior and performance in public sector organizations, by investigating conflicts as a fundamental and inevitable part of…

Abstract

Purpose

The study aims to contribute to the literature on board behavior and performance in public sector organizations, by investigating conflicts as a fundamental and inevitable part of interactions between board members. Despite impressive advances in studying the behavioral dimensions of governing bodies, several gaps still remain in our knowledge, especially for public sector boards. These face specific challenges related to multiple, conflicting, and ambiguous goals.

Methodology/approach

Earlier studies identified four different types of conflict (affective, cognitive, interest, and authority conflicts). These were used to guide a systematic literature review considering the source and the nature of conflicts to classify and describe the state of knowledge on the topic.

Findings

Most academic contributions emphasized cognitive and interest conflicts, suggesting that solving them was essential to improve board performance and enable boards to create value. The results suggest the utility of broadening the perspective of the governing board role, moving beyond agency and institutional theory, taking into consideration resource dependence theory as an alternative perspective to investigate board roles and task expectations.

Originality/value

Understanding conflicts within public boards is an interesting challenge from several perspectives. First, it provides a deep look inside board decision-making processes using a behavioral perspective. Second, analyzing the nature and sources of conflict places boards in a better position to address complex political issues. Finally, resolving conflicts may lead boards to channel their energies into collaborative activities that stimulate best practices, facilitate mutual awareness, and generate commitment to cooperation inside and outside the boardroom.

Details

Governance and Performance in Public and Non-Profit Organizations
Type: Book
ISBN: 978-1-78635-107-4

Keywords

Book part
Publication date: 3 July 2018

Ilenia Cecchetti, Veronica Allegrini and Fabio Monteduro

The chapter aims to analyse the influence of the board of directors on transparency and integrity in hybrid organisations like state-owned enterprises. The effect of several…

Abstract

The chapter aims to analyse the influence of the board of directors on transparency and integrity in hybrid organisations like state-owned enterprises. The effect of several characteristics of directors on the board’s effectiveness was assessed. The empirical analysis was based on 60 Italian listed and non-listed state-owned enterprises. Each enterprise’s website was individually examined and coded to obtain two self-constructed indexes on transparency and integrity, and a regression model was created to test the hypotheses.

The ‘knowledge structure’ of interlocking directors and board compensation were found to be both positively related to the level of commitment among state-owned enterprises to transparency and integrity. Skill and gender diversity on the board had no significant impact. The analysis used data from a one-year period but dealt with hidden and complex phenomena like corruption. Future longitudinal studies and qualitative approaches would provide more comprehensive insights into the relationship between the board of directors, transparency and integrity over time.

Policymakers and all those involved in the appointment of directors to state-owned enterprises should be aware that some features of board members may affect the levels of organisational transparency and integrity. The chapter contributes to the literature on governance of state-owned enterprises, emphasising the board’s role and its effectiveness in sustaining transparency and integrity.

Details

Hybridity in the Governance and Delivery of Public Services
Type: Book
ISBN: 978-1-78743-769-2

Keywords

Open Access
Book part
Publication date: 7 September 2023

Ellen Ernst Kossek, Brenda A. Lautsch, Matthew B. Perrigino, Jeffrey H. Greenhaus and Tarani J. Merriweather

Work-life flexibility policies (e.g., flextime, telework, part-time, right-to-disconnect, and leaves) are increasingly important to employers as productivity and well-being…

Abstract

Work-life flexibility policies (e.g., flextime, telework, part-time, right-to-disconnect, and leaves) are increasingly important to employers as productivity and well-being strategies. However, policies have not lived up to their potential. In this chapter, the authors argue for increased research attention to implementation and work-life intersectionality considerations influencing effectiveness. Drawing on a typology that conceptualizes flexibility policies as offering employees control across five dimensions of the work role boundary (temporal, spatial, size, permeability, and continuity), the authors develop a model identifying the multilevel moderators and mechanisms of boundary control shaping relationships between using flexibility and work and home performance. Next, the authors review this model with an intersectional lens. The authors direct scholars’ attention to growing workforce diversity and increased variation in flexibility policy experiences, particularly for individuals with higher work-life intersectionality, which is defined as having multiple intersecting identities (e.g., gender, caregiving, and race), that are stigmatized, and link to having less access to and/or benefits from societal resources to support managing the work-life interface in a social context. Such an intersectional focus would address the important need to shift work-life and flexibility research from variable to person-centered approaches. The authors identify six research considerations on work-life intersectionality in order to illuminate how traditionally assumed work-life relationships need to be revisited to address growing variation in: access, needs, and preferences for work-life flexibility; work and nonwork experiences; and benefits from using flexibility policies. The authors hope that this chapter will spur a conversation on how the work-life interface and flexibility policy processes and outcomes may increasingly differ for individuals with higher work-life intersectionality compared to those with lower work-life intersectionality in the context of organizational and social systems that may perpetuate growing work-life and job inequality.

Details

Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-83753-389-3

Keywords

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