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1 – 10 of 379
Article
Publication date: 5 December 2023

Abdelazeem Hassan Shehata Atyia and Abdelrahman Mohamed Ghanim

The accurate modeling of magnetic hysteresis in electrical steels is important in several electrical and electronic applications. Numerical models have long been known that can…

Abstract

Purpose

The accurate modeling of magnetic hysteresis in electrical steels is important in several electrical and electronic applications. Numerical models have long been known that can correctly reproduce some typical behaviours of these magnetic materials. Among these, the model proposed by Jiles and Atherton must certainly be mentioned. This model is intuitive and fairly easy to implement and identify with relatively few experimental data. Also, for this reason, it has been extensively studied in different formulations. The developments and numerical tests made on this hysteresis model have indicated that it is able to accurately reproduce symmetrical cycles, especially the major loop, but often it fails to reproduce non-symmetrical cycles. This paper aims to show the positive aspects and highlight the defects of the different formulations in predicting the minor loops of electrical steels excited by non-sinusoidal currents.

Design/methodology/approach

The different formulations are applied to different electrical steels, and the data coming from the simulations are compared with those measured experimentally. The direct and inverse Jiles–Atherton models, including the introduction of the dissipative factor approach, are presented, and their limitations are proposed and validated using the measurements of three non-grain-oriented materials. Only the measured major loop is used to identify the parameters of the Jiles–Atherton model. Furthermore, the direct and inverse Jiles–Atherton models were used to simulate the minor loops as well as the hysteresis cycles with direct component (DC) bias excitation. Finally, the simulation results are discussed and compared to measurements for each study case.

Findings

The paper indicates that both the direct and the inverse Jiles–Atherton model formulations provide a good agreement with the experimental data for the major loop representation; nevertheless, both models can not accurately predict the minor loops even when the modification approaches proposed in the literature were implemented.

Originality/value

The Jiles–Atherton model and its modifications are widely discussed in the literature; however, some limitations of the model and its modification in the case of the distorted current waveform are not completely highlighted. Furthermore, this paper contains an original discussion on the accuracy of the prediction of minor loops from distorted current waveforms, including DC bias.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 43 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 9 November 2022

Rosamaria Cox Moura-Leite, José Carlos de Jesus Lopes and Carolina Yamazaki

This study aims to analyze the situation of Federal Universities (FUs) regarding compliance with the Sustainable Logistics Management Plan (PLS) Normative Instruction (NI…

Abstract

Purpose

This study aims to analyze the situation of Federal Universities (FUs) regarding compliance with the Sustainable Logistics Management Plan (PLS) Normative Instruction (NI) 10/2012, the adoption of which is compulsory for all agencies and entities of direct, autarchic and foundational public administration and dependent state-owned enterprises, including FUs. PLS is an instrument intended to establish sustainability practices in the management of public organizations.

Design/methodology/approach

The data were collected through searches on the websites of the 68 Brazilian FUs that constitute the study population, along with their plans of action (PAs) and monitoring reports.

Findings

The collected data revealed that only 25% of the FUs had a current PA and 15% published a report for the years 2020 or 2021. Furthermore, the most commonly found mandatory issue to be addressed in PAs was electricity, and the least frequent was sustainable procurement and contracting.

Research limitations/implications

Future research should be conducted with the Management Committee of the PLS to understand the reason for the discontinuity of this work in some universities and the rationale behind the mandatory issues.

Originality/value

Some studies address FUs’ implementation of PLS, which promotes sustainable management systems. However, each of the identified studies investigated only one of the seven mandatory issues set down in NI 10/2012, which did not allow a complete assessment of the FUs’ situation exclusively in respect of compliance with the PLS.

Details

International Journal of Sustainability in Higher Education, vol. 24 no. 4
Type: Research Article
ISSN: 1467-6370

Keywords

Article
Publication date: 6 June 2023

Guilherme Tolentino, Guillaume Parent, Olivier Ninet, Mathieu Rossi, Jean Vianei Leite and Jonathan Blaszkowski

The horizontal rotational single-sheet tester (RSST) suffers from weaknesses such as the reduced size of test samples, measurement disturbances due to magnetic flux leakage and…

25

Abstract

Purpose

The horizontal rotational single-sheet tester (RSST) suffers from weaknesses such as the reduced size of test samples, measurement disturbances due to magnetic flux leakage and nonhomogeneity of field in the measurement area. Although the vertical RSST allows to overcome the first two aforementioned drawbacks, the heterogeneity of the field in the test sample remains an issue. In addition, there is still a lack of device standardization to ensure test repeatability, as already is well established with the Epstein frame. This paper aims to investigate the influence of several parameters on the field homogeneity in the test sample.

Design/methodology/approach

A fully 3D finite element model of a vertical RSST is developed and used to perform a sensibility study on several geometrical parameters.

Findings

The influence of several parameters on the field homogeneity in the test sample, such as the geometrical dimensions of the yokes, the presence or not of holes drilled inside the test sample for B-coil placement as well as the size of the H-coils and B-coils, is addressed.

Originality/value

It is expected that this study will contribute to the optimization and standardization vertical RSSTs.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 42 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 June 2022

James T. O'Connor, Fernanda Leite and Jong Won Ma

The purpose of this paper is to present a comprehensive analysis on how the advanced work packaging (AWP) managerial paradigm could be advanced by incorporating and integrating…

Abstract

Purpose

The purpose of this paper is to present a comprehensive analysis on how the advanced work packaging (AWP) managerial paradigm could be advanced by incorporating and integrating the post-construction commissioning and startup (CSU) phases.

Design/methodology/approach

This study was implemented with the support of consolidated knowledge from industry subject matter experts and an exhaustive literature review to provide a knowledge foundation for the developments. The findings were further validated and strengthened by external subject matter experts.

Findings

A new operating system-oriented work package, systems work package (SWP), is devised with a set of definitions and models of how it relates to AWPs with three-dimensional visualizations. SWP-related constraints, key roles and responsibilities are thoroughly investigated.

Research limitations/implications

A new SWP concept would pose potential challenges for its adoption because of inherent organizational culture and hesitation to change. A systematic reorganization of existing practices is considered as a key strategy to alleviate the limitation, and short- and long-term validity of SWP is currently being investigated by organizations.

Practical implications

This research provides practical implementation strategies on CSU integration which lead to benefits including: better alignment and collaboration of stakeholders, reduced costs for associating AWPs to SWP and improved predictability.

Originality/value

AWP-related studies have primarily focused on the construction phase, with minimal integration of CSU considerations. Highlighting the importance of the philosophy “start with the end in mind,” this research describes how the AWP managerial paradigm can be expanded to include CSU, by placing a strong emphasis on understanding CSU priorities, sequences and constraints.

Details

Construction Innovation , vol. 23 no. 5
Type: Research Article
ISSN: 1471-4175

Keywords

Article
Publication date: 15 May 2023

Pedro G.C. Pio, Tiago Sigahi, Izabela Simon Rampasso, Eduardo Guilherme Satolo, Milena Pavan Serafim, Osvaldo L.G. Quelhas, Walter Leal Filho and Rosley Anholon

This paper compares traditional and digital banks in nine categories of complaints and provides insights to improve complaint management performance.

Abstract

Purpose

This paper compares traditional and digital banks in nine categories of complaints and provides insights to improve complaint management performance.

Design/methodology/approach

A sample of the major Brazilian banks was defined, with four traditional and four digital banks. The grey relational analysis (GRA) method was applied as an analytical tool to compare the most frequent complaints of traditional and digital banks. The most critical complaints identified were considered to discuss potential improvements in complaint management using quality and service management system concepts.

Findings

The GRA method enabled the development of a ranking of nine complaint categories, considering the uncertainty involved in the data and differentiating between traditional and digital banks. The most critical complaint categories, regardless of business model, were “unauthorized charges” and “poor service,” which were ranked first and second in the frequency rankings. Traditional and digital banks differed the most in the complaint category “unfair charge,” ranking third and eighth in the rankings, respectively.

Practical implications

Managers from traditional and digital banks can improve complaint management performance by applying ISO 9001 and ISO 20000 concepts such as incident, problem, change, service level, availability, capacity, information technology service continuity and financial management.

Social implications

The study's findings can help bank managers improve service levels in the face of technological competition. Improving these organizations is an important factor for developing countries such as Brazil.

Originality/value

This paper reveals the differences between two business models regarding complaint management. It also considers a methodological approach to include the uncertainty related to customers' perception and subjectivity inherent to complaints.

Details

International Journal of Productivity and Performance Management, vol. 73 no. 4
Type: Research Article
ISSN: 1741-0401

Keywords

Article
Publication date: 27 March 2023

Xiao Xiao, Fabian Müller, Martin Marco Nell and Kay Hameyer

The goal of this research is to investigate the convergence behavior of the Newton iteration, when solving the nonlinear problem with consideration of hysteresis effects…

Abstract

Purpose

The goal of this research is to investigate the convergence behavior of the Newton iteration, when solving the nonlinear problem with consideration of hysteresis effects. Incorporating the vector hysteresis model in the magnetic vector potential formulation has encountered difficulties. One of the reasons is that the Newton method is very sensitive regarding the starting point and states distinct requirements for the nonlinear function in terms of monotony and smoothness. The other reason is that the differential reluctivity tensor of the material model is discontinuous due to the properties of the stop operators. In this work, line search methods to overcome these difficulties are discussed.

Design/methodology/approach

To stabilize the Newton iteration, line search methods are studied. The first method computes an error-oriented search direction. The second method is based on the Wolfe-Powell rule using the Armijo condition and curvature condition.

Findings

In this paper, the differentiation of the vector stop model, used to evaluate the Jacobian matrix, is studied. Different methods are applied for this nonlinear problem to ensure reliable and stable finite element simulations with consideration of vector hysteresis effects.

Originality/value

In this paper, two different line search Newton methods are applied to solve the magnetic field problems with consideration of vector hysteresis effects and ensure a stable convergence successfully. A comparison of these two methods in terms of robustness and efficiency is presented.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 42 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 2 October 2023

Ashraf M. Salama, Madhavi P. Patil and Laura MacLean

Despite striving for resilience and a sustainable urban future, European cities face a multitude of crisis caused by both natural and human-induced risks. This paper asks two key…

Abstract

Purpose

Despite striving for resilience and a sustainable urban future, European cities face a multitude of crisis caused by both natural and human-induced risks. This paper asks two key questions: How have cities experienced and managed crises situations they encountered? and What are the plans and actions for embedding sustainability at a local level within a clear decision-making structure? Hence, it aims to examine urban resilience in the context of urban crisis and the associated health concerns that took place because of crisis situations, while identifying sustainable urban development initiatives and strategies that were conceived and implemented beyond crisis.

Design/methodology/approach

An evidence-based analytical approach is undertaken following two lines of inquiry. The first is case-based and identifies 11 cities that have experienced crisis situations and a further 10 cities that have instigated urban resilience strategies. The second is theme-based and engages with identifying strategies relevant to sustainable urban development at city and project levels. The outcomes of the two lines of inquiry are verified by mapping the lessons learned from the analysis to recent international guidance and a further co-visioning workshop with 6 experts.

Findings

The evidence-based analysis reveals key lessons which were classified under two primary types of findings: (a) lessons learned for a future urban resilience resulting from the 1st line of Inquiry (case-based) and (b) lessons learned for a future sustainable urban development resulting from the 2nd line of inquiry (theme-based). The verified lessons provide four areas that can be utilised as key priorities for future urban resilience and sustainable urban development including (a) Governance, effective communication, and decision making for city resilience and urban sustainability; (b) the social dimension of resilience and participatory practices for sustainable urban development; (c) from implicit strategies for health to positive impact on health; and (d) diversification of initiatives and localisation of sustainable development endeavours.

Research limitations/implications

There is always limitation on what a bibliometrics analysis can offer in terms of the nature of evidence and the type of knowledge generated from the investigation. This limitation manifests in the fact that the analysis engages with the body of knowledge but not based on engaging physically or socially with the contexts within which the cases took place or through empirical investigations including systematic observations, focused interviews, and attitude surveys. While the study does not generate empirical findings, the rigour of the bibliometrics analysis offers a credible and reliable evidence on how cities experienced and managed crises situations and their current plans and priority actions for embedding and localising sustainable development measures.

Practical implications

This research conveys significant implications for policy, practice, and action in that it crystalises the view that understanding urban resilience and sustainability, at the city or urban level, requires coupling the two. The findings offer a solid foundation for a more contextualised, evidence-based examination of urban resilience and sustainability during and beyond crisis. Highlighting urban and health challenges that emerged from experienced crisis situations, how these were managed and developing an understanding of sustainable urban development and local resilience strategies elucidate insights that can be adopted and acted upon by city councils and built environment practitioners.

Originality/value

The analysis provides comprehensive insights into urban resilience and sustainable urban development at both city and continental Europe scales in the form of key lessons that represent the first step towards developing rudiments for building a better urban future. Little is known about resilience and sustainability at these scales. The originality of this work lies in the breadth and depth for capturing an inclusive understanding of urban resilience and sustainable urban development based on systematic inquiry and scrutinising the body of knowledge emerged over the past 2 decades.

Details

Smart and Sustainable Built Environment, vol. 13 no. 2
Type: Research Article
ISSN: 2046-6099

Keywords

Article
Publication date: 9 October 2023

Mohammad A. Hassanain, Mahmoud A. Zourob and Ahmed M. Ibrahim

This study aims to analyze the facilities managers’ involvement over the project life cycle phases (PLP), based on theoretical knowledge, consensus from empirical assessment of…

Abstract

Purpose

This study aims to analyze the facilities managers’ involvement over the project life cycle phases (PLP), based on theoretical knowledge, consensus from empirical assessment of facilities managers and consultants’ practices.

Design/methodology/approach

A literature review was undertaken to determine the different tasks that facilities managers typically handle, identify project phases and their underlying activities in which facilities managers would be involved. This was followed by targeting a group of consultants to build a consensus, upon the identified involvement of facilities managers, over the PLP, while measuring the level of involvement from a representative group of facilities managers in Saudi Arabia. A matching between the perceptions and practice has been performed to serve as recommendations for future research on improving the practice in Saudi Arabia.

Findings

The involvement of facilities managers in the PLP is relatively low, according to the consultants’ perceptions. Consultants perceive that facilities managers should be involved in more professional activities, which would ultimately improve projects’ delivery to clients.

Practical implications

The involvement of facilities managers over the PLP ensures effective delivery of projects and reduces the multiplicity of challenges at the operation and maintenance phase. The viewing of facility managers’ involvement adds to the effectiveness of their role within the building industry.

Originality/value

This paper investigates the consultants’ perception of the involvement venues for facility managers to perform activities which are evaluated to be “mandatory,” “advantageous” or “not necessary.” The study reflects the state of facilities management practice, and the consensus of consultants toward the role of the facility managers through the PLP.

Details

Journal of Facilities Management , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1472-5967

Keywords

Open Access
Article
Publication date: 11 January 2024

Bartosz Niedzielski, Piotr Buła and Mengxi Yang

Hyperautomation is a technological concept whose popularity has been growing continuously since the German manufacturing industry “initiated” the Fourth Industrial Revolution…

Abstract

Purpose

Hyperautomation is a technological concept whose popularity has been growing continuously since the German manufacturing industry “initiated” the Fourth Industrial Revolution (Industry 4.0), whereas, on the basis of theory, hyperautomation is a term still new and little recognized. This applies equally to scientific studies (articles, conference reports) and empirical studies (quantitative, qualitative). Therefore, this article attempts to fill definition gap that exists in the literature on management and quality sciences on the term hyperautomation.

Design/methodology/approach

The authors use literature review approach to identify the gaps in the existing literature on hyperautomation. They present a nominal definition of hyperautomation, discuss related issues and provide a comparative perspective between hyperautomation and automation.

Findings

The article’s findings include a precise definition of hyperautomation and the problems it raises. The authors point out that the term “hyperautomation” is still relatively new and underutilized in the management and quality sciences literature. It also compares hyperautomation to automation from several angles and emphasizes how it affects businesses, industries and other economic sectors.

Practical implications

Authors emphasize that in order to deploy hyperautomation successfully, enterprises must take a distributed and integrated approach.

Originality/value

This article addresses a gap in the management and quality sciences literature about the definition of hyperautomation. Authors give a thorough explanation of hyperautomation, along with relevant problems, useful implications and a comparison between hyperautomation versus automation.

Details

Journal of Electronic Business & Digital Economics, vol. 3 no. 1
Type: Research Article
ISSN: 2754-4214

Keywords

Article
Publication date: 10 October 2023

M.S. Narassima, Vidyadhar Gedam, Angappa Gunasekaran, S.P. Anbuudayasankar and M. Dwarakanath

This study aims to explore supply chain resilience (SCR) and provides a unique resilience index. The work measures the resilience status of 37 organizations across 22 industries…

Abstract

Purpose

This study aims to explore supply chain resilience (SCR) and provides a unique resilience index. The work measures the resilience status of 37 organizations across 22 industries and provides insight into accessing the supply chain (SC) vulnerability in an uncertain environment.

Design/methodology/approach

This study involves measuring the resilience status of 37 organizations across 22 industries based on a subjective decision-making approach using fuzzy logic. Experts from industries rated the importance and level of implementation of 33 attributes of SCR, which are used to develop a fuzzy index of implementation that explains the resilience status of organizations.

Findings

A novel coexistent resilience index is computed based on mutualism to exhibit the proportion of contribution or learning of each attribute of an organization in an industry. The research will enhance the response plans and formation of strategic alliances for mutual coexistence by industry.

Research limitations/implications

Evidence-based interpretations and suggestions are provided for each industry to enhance resilience through coexistence.

Originality/value

The work uniquely contributes to academic literature and SC strategy. The novel coexistent resilience index is computed based on mutualism, facilitating researchers to access SC resiliency.

Details

Supply Chain Management: An International Journal, vol. 29 no. 2
Type: Research Article
ISSN: 1359-8546

Keywords

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