bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic field and electromagnetic performance analysis of permanent magnet machines with segmented Halbach array
Authors: Zhang Heshan , Wang YanPeng , Tuo Jiying , Yang Minglei , Ma Ying , Xu Jin 
Published: November 2021

Purpose
This study aims to accurately calculate the magnetic field distribution, which is a prerequisite for pre-design and optimization of electromagnetic performance. Accurate calculation of magnetic field distribution is a prerequisite for pre-design and optimization.

Design/methodology/approach
This paper proposes an analytical model of permanent magnet machines with segmented Halbach array (SHA-PMMs) to predict the magnetic field distribution and electromagnetic performance. The field problem is divided into four subdomains, i.e. permanent magnet, air-gap, stator slot and slot opening. The Poisson’s equation or Laplace’s equation of magnetic vector potential for each subdomain is solved. The field’s solution is obtained by applying the boundary conditions. The electromagnetic performances, such as magnetic flux density, unbalanced magnetic force, cogging torque and electromagnetic torque, are analytically predicted. Then, the influence of design parameters on the torque is explored by using the analytical model.

Findings
The finite element analysis and prototype experiments verify the analytical model’s accuracy. Adjusting the design parameters, e.g. segments per pole and air-gap length, can effectively increase the electromagnetic torque and simultaneously reduce the torque ripple.

Originality/value
The main contribution of this paper is to develop an accurate magnetic field analytical model of the SHA-PMMs. It can precisely describe complex topology, e.g. arbitrary segmented Halbach array and semi-closed slots, etc., and can quickly predict the magnetic field distribution and electromagnetic performance simultaneously.
Initial stress and heterogeneity effects on torsional waves in dry sand half-space between reinforced half-space and poroelastic medium
Authors: Poonem Latha Madhuri , Gurijala Rajitha , Ala Sindhuja , Perati Malla Reddy 
Published: November 2021

PurposeThe purpose of this paper is to investigate the effect of initial stress and heterogeneity on the propagation of torsional waves in dissipative medium. The problem consists of dry sand poroelastic half-space embedded between heterogeneous self-reinforced half-space and poroelastic medium. The frequency equation is derived in the framework of Biot's theory with some variants.Design/methodology/approachTorsional wave propagation in dry sand poroelastic half-space embedded between self-reinforced half-space and poroelastic medium. All the constituents here are assumed to be dissipative, heterogeneous and initial stressed.FindingsPhase velocity and attenuation are computed against wavenumber for various values of self-reinforcement parameter, inhomogeneity parameter and initial stress. Particular cases are discussed in absence of dissipation. The numerical results are presented graphically.Originality/valueInitial stress and heterogeneity effects on torsional waves in dry sand half-space between reinforced half-space and poroelastic medium are investigated. The frequency equation is derived, and which intern gives the phase velocity and attenuation coefficient for various values of initial stress, self-reinforcement parameter and heterogeneity parameter. From the numerical results, it is clear that as wavenumber varies phase velocity and attenuation are periodic in nature for all the cases. Particular cases are discussed in absence of dissipation. This kind of analysis can be extended to any elastic solid by taking magnetic, thermo and piezoelectric effects into account.
Dancing in the storm: finessing emergency remote teaching in the COVID-19 pandemic
Authors: Whittaker Louise , Pearson Hayley 
Published: November 2021

Case overview
The Gordon Institute of Business Science (GIBS), a South African based business school and one of the top ranked business schools in Africa, was yet again facing a crisis during the COVID-19 pandemic. Having emerged out of an extraordinary year of strict lockdown regulations and having managed a rapid shift to emergency remote teaching. GIBS had managed to maintain its academic programmes, ensuring the completion of the curriculum within the academic year whilst maintaining the exceptionally high standards and quality learning experience it was known for. As 2020 drew to a close, the academic programmes team and the students looked forward to starting the new year in a more “normal” mode of operation. GIBS closed for Christmas holiday with the intent on returning, in early 2021, in some form of face-to-face teaching. However, on the 27th of December 2020, the President of South Africa announced a return to level-3 lockdown as the second wave of infections swept through the country. Strict measures were once again enforced, significantly impacting GIBS’ possible return to campus in January 2021. Reflecting on the lessons learnt over the past year, the Executive Director: Academic Programmes, Professor Louise Whittaker, yet again faced the challenge of deciding how best to proceed given the circumstances. The case illustrates the need for effective change management through the application of Kotter’s 8 steps to transformation, whilst demonstrating the complexity of change management during a crisis. A particular focus on the importance of communication during a change management process in a crisis is illustrated through this case.

Expected learning outcomes
The learning outcomes are as follows: students need to understand that in a crisis, change management will be emergent and requires flexibility and adaptability; students will determine what concrete actions may be required during a change management process in a crisis; students will need to discern that theoretical models do not necessarily fit real world contexts, particularly in a crisis situation; and students will identify aspects that might be missing or inadequately formulated in standard models of change management.

Complexity academic level
The case is positioned at a post-graduate level and would be ideal as a teaching case for business school students on a Master of Business Administration programme, a specialised business masters programme or selected executive education programmes for general managers or senior executives. The case can be taught in a course in the following fields, namely, change management, leadership or strategy.

Supplementary materials
Teaching notes are available for educators only.

Subject code
CSS 11: Strategy.
Beirut port blast: an escapable disaster in more than one way
Authors: Al Daia Roula , Khayr Yaacoub Hala 
Published: November 2021

Complexity academic level
The blast at Beirut Port on the 4th of August was the cherry on the cake in a series of disastrous governmental failures manifested in the of lack of trust, an unprecedented economic crisis, hyperinflation, financial fallout, political bottle necks, toxic environmental situation and a vertical cleavage between the government and the people. The blast resulted in billions of dollars in losses both at the port and the surrounding Beirut area, destroyed more than 300,000 housing units, displaced their residents, ruined many artifacts of cultural heritage, injured thousands of people and killed hundreds. Definitely, it was a case of negligence in the storage of the Ammonium Nitrate, corruption, irresponsible leadership or all of these together. However, investigations are still underway to pinpoint the responsible individuals and to bring them to justice. This case looks at potential ways that could have prevented the blast, by questioning the reasons behind the non-voicing out of objections against the nature of the material stored unsafely for several years in Container 12 at the Port. Through the lens of Hadi Karim, a fictional character, the authors lead the readers to consider the disaster’s characterization, as well as applicable disaster management frameworks. The case also emphasizes the role of public leadership and leads the readers to consider measures and processes that could have been abided by to prevent the disaster.

Case overview
Against the backdrop of the recent Beirut Port explosion, this case examines how events unfolded leading up to the tragedy, highlighting how it could have been avoided, as well as the managerial and ethical dimensions involved.

Leaning objectives
At the end of the case, students will be able to: 1. Characterize the disaster in terms of type and nature. 2. Analyze the blast by referring to the relevant disaster management frameworks. 3. Analyze the critical role of ethical and transformational leaders pre and post disaster. 4. Reflect on the role of employees in preventing disasters mainly through whistleblowing.

Social implications
Shedding the light on an avoidable disaster, drawing lessons to avoid the occurrence of such events in the future, and raising awareness on disaster management and on whistleblowing as a tool in the ethical leader’s toolbox.

Supplementary materials
Teaching notes are available for educators only.

Subject code
CSS 10: Public Sector Management.
Public procurement capabilities as engines for collaboration and enhanced performance in complex projects
Authors: Santos Juliana Bonomi , Cabral Sandro 
Published: November 2021

PurposeThis paper explores how public buyers' capabilities promote collaboration with private suppliers to obtain enhanced performance in complex projects.Design/methodology/approachThe authors conducted two case studies on the procurement of complex military projects by the Brazilian armed forces involving public buyers and private suppliers. The authors followed the Gioia methodology to inductively analyze data from interviews, official documents, media articles and project meeting notes.FindingsThe authors identified public procurement capabilities that are antecedents of collaborative trust-based relationships with suppliers in complex public-private projects. The authors unpack these capabilities in three subsets: abilities to manage the bidding and contracting process, to handle relationships with prominent stakeholders, such as audit control bodies and to manage knowledge acquired within and across current and past projects. By developing these capabilities, public buyers can build collaborative trust-based relationships with suppliers, which enable the conciliation of operational performance (i.e. on-time delivery, budget and scope compliance) and policy goals (i.e. inclusion of local suppliers in supply chains).Originality/valueThe authors extend the literature on the enablers of trust and collaboration in buyer-supplier relationships by providing a detailed account of which capabilities are necessary on the buyer side in complex projects, especially when accountability standards create barriers for collaborative practices. The authors also reinforce the importance of the operations and supply chain management scholarship in policy debates by showing how buyer-supplier interactions can create value in complex projects with public and private sectors.
Do cloud-based enterprise resource planning systems affect the productivity of human resources in the COVID-19 era?
Authors: Yao Xiaojun , Azma Masoumeh 
Published: November 2021

PurposeThis study aims to investigate the impact of skills and knowledge of employees, economic situations of the company, current IT infrastructure, payment fashion, cloud availability, and cloud privacy and security on the productivity of the human resources in the COVID-19 era.Design/methodology/approachOver the past few years, the advent of cloud-assisted technologies has dramatically advanced the Information Technology (IT)-based industries by providing everything as a service. Cloud computing is recognized as a growing technology among companies around the world. One of the most critical cloud applications is deploying systems and organizational resources, especially systems whose deployment costs are high. Manpower is one of the basic and vital resources of the organization, and organizations need an efficient workforce to achieve their goals. But, in the COVID-19 era, human resources' productivity can be reduced due to stress, high labor force, reduced organizational performance and profits, unfavorable organizational conditions, inability to manage and lack of training. Therefore, this study tries to investigate the productivity of human resources in the COVID-19 era. Data were collected from the medium-sized companies through a questionnaire. Distributed questionnaires were conducted on the Likert scale. The model is assessed using the structural equation modeling technique to examine its reliability and validity. The study is a library method and literature review. A case study was conducted through a questionnaire and statistical analysis by SPSS 25 and SMART-PLS.FindingsBased on the findings, the skills and knowledge of employees, the economic situations of the company, payment fashion, cloud availability and the current IT infrastructures of the company have a positive impact on human resource efficiency in the COVID-19 era. But cloud privacy and security have a negative effect on the productivity of human resources. The findings can be the basis for companies and organizations in the COVID-19 era.Research limitations/implicationsThis study has some restrictions that need to be considered in evaluating the obtained results. First, due to the prevalence of Coronavirus, access to information from the companies under study was limited. Second, this research may have overlooked other variables that affect human resource productivity in the COVID-19 era. Prospective researchers can examine the impact of Customer Relationship Management (CRM) and Supply Chain Management (SCM) on the human resource's productivity in the COVID-19 era.Practical implicationsThe results of this research are applicable for all companies, their departments and human resources in the COVID-19 era.Originality/valueIn this paper, human resources' productivity in the COVID-19 era is pointed out. The presented new model provides a complete framework for investigating cloud-based enterprise resource planning systems affect the productivity of human resources in the COVID-19 era.
Analysis of the socioeconomic barriers in implementing public health measures to contain COVID-19 transmission in Pakistan: a DELPHI–DEMATEL-based approach
Authors: Ali Sharafat , Faizi Bushra , Waqas Hamid , Ahmed Waqas , Shah Syed Ahsan Ali 
Published: November 2021

PurposeThe present study aims to identify and evaluate the socioeconomic barriers to effective COVID-19 pandemic transmission control in Pakistan.Design/methodology/approachThe study identifies multiple socio-economic barriers through an extensive literature review. The preliminary analysis unveiled 15 socio-economic barriers. Nine experts were contacted to collect data and finalize the most prominent barriers to COVID-19 transmission control using the DELPHI method. The Decision-Making Trial and Evaluation Laboratory (DEMATEL) method was used to process and interpret the data collected and a cause–effect relationship was established among the barriers.FindingsThe finalized barriers to effective COVID-19 pandemic transmission control were evaluated using DEMATEL which grouped criteria into two grouped criteria – cause and effect. The DEMATEL analysis shows that poor safety culture, lack of strategy and goal setting, lack of resources, late realization and recognition of the pandemic problem and lack of expertise and capacity in disaster and risk management fall into the cause group. These factors are critical as they directly affect the remaining barriers identified in the study.Originality/valueDespite the collective global efforts, the national economies have been struggling to completely control COVID-19 transmission control. Pakistan’s economy has been facing the third wave of the pandemic. It is mandatory to identify the barriers and evaluate them to develop a comprehensive strategy ensuring that there would be no fourth wave. The study identifies and evaluates the barriers to COVID-19 transmission control in Pakistan using the integrated DELPHI-DEMATEL framework. The findings would help the government, experts and strategists to develop a comprehensive disaster and risk management strategy.
Perceptions on adopting artificial intelligence and related technologies in libraries: public and academic librarians in North America
Authors: Yoon JungWon , Andrews James E. , Ward Heather L. 
Published: November 2021

PurposeThis study aims to understand how artificial Intelligence (AI) and related technologies are currently being utilized in public and academic libraries and how librarians perceive the adoption of new technologies in their relative libraries.Design/methodology/approachUsing an online survey questionnaire, the authors collected survey responses from both public and academic librarians that were subscribed to information science-centered listservs in North America. The quantitative survey responses (N = 242) were measured through use of multiple chi-square tests and crosstab analyses.FindingsThe current use and awareness of AI and related technologies were more reported from academic librarians; however, public librarians' reported perceptions on such technologies were generally more positive. In all, 67% of them responded that AI and related technologies will transform the library's functions, and 68% of librarians reported that they are interested in training. This study discussed the significance of training for preparing librarians for AI and related technologies and the further examination on the role of librarians in the new era.Originality/valueThis study examined public and academic librarians' perceptions toward the adoption of six emerging technologies which often appear in the LIS literature as well as addressed as the Fourth Industrial Revolution technologies.
Audit sampling strategies and frauds: an evidence from Africa
Authors: Nagirikandalage Padmi , Binsardi Arnaz , Kooli Kaouther 
Published: November 2021

Purpose
This paper aims to investigate how professionals such as accountants, auditors, senior civil servants and academics perceive the use of audit sampling strategies adopted by professionals to increase detection rates of frauds and corruption within the public sector in Africa. It also examines the respondents’ perceived values regarding the reasons for committing frauds, types of fraud and corruption, as well as the aspects of audit sampling strategies to tackle frauds.

Design/methodology/approach
This research uses non-parametric statistics and logistic regression to analyse the respondents’ opinions regarding the state of frauds and corruption in Africa (particularly in Tunisia and non-Tunisia countries), the common factors behind people committing frauds, including the types of frauds and corruption and the respondents’ opinions on the use of audit sampling strategies (non-random and random) to examine the instances of frauds and corruption.

Findings
The findings indicate that most respondents prefer to use non-probabilistic audit sampling rather than more robust sampling strategies such as random sampling and systematic random sampling to detect frauds and corruption. In addition, although there are some minor statistical differences between the countries in terms of the respondents’ perceived values on skimming fraud and on the use of audit random sampling to tackle rampant corruption in Africa, the overall findings indicate that opinions do not significantly differ between the respondents from Tunisia and other countries in terms of the types of fraud, the reasons for committing fraud and the auditing sampling strategies used to investigate the frauds.

Research limitations/implications
This research serves as an analytical exploratory study to instigate further audit sampling research to combat rampant fraud and corruption in the public sector in Africa.

Originality/value
There are few or non-existent studies investigating the application of audit sampling strategies in Africa countries, particularly to examine the application of audit random sampling and audit non-random sampling strategies to detect fraudulent activities and corruption. Correspondingly, this research carries strategic implications for accountants and auditors to successfully detect fraudulent activities and corruption in Africa.
The Tragedy – And Legacy – Of Chen Wen-Chen
Authors: Smykla Margaret L. 
Published: November 2021

Abstract
In 1981, Chen Wen-chen, a statistics professor at Carnegie Mellon University, left the USA to visit family in Taiwan. He never returned. Forty years on from his tragic and suspicious death, friends and former colleagues remember a promising young academic, whose contributions to statistics were cut short, but whose hopes for a democratic Taiwan were eventually realised. Margaret L. Smykla of Carnegie Mellon University takes up the story
Metabolic engineering of Vibrio natriegens for anaerobic succinate production
Authors: Thoma Felix , Schulze Clarissa , Gutierrez‐Coto Carolina , Hädrich Maurice , Huber Janine , Gunkel Christoph , Thoma Rebecca , Blombach Bastian 
Published: November 2021

SummaryThe biotechnological production of succinate bears serious potential to fully replace existing petrochemical approaches in the future. In order to establish an economically viable bioprocess, obtaining high titre, yield and productivity is of central importance. In this study, we present a straightforward engineering approach for anaerobic succinate production with Vibrio natriegens, consisting of essential metabolic engineering and optimization of process conditions. The final producer strain V. natriegens Δlldh Δdldh Δpfl Δald Δdns::pycCg (Succ1) yielded 1.46 mol of succinate per mol of glucose under anaerobic conditions (85% of the theoretical maximum) and revealed a particularly high biomass‐specific succinate production rate of 1.33 gSucc gCDW−1 h−1 compared with well‐established production systems. By applying carbon and redox balancing, we determined the intracellular flux distribution and show that under the tested conditions the reductive TCA as well as the oxidative TCA/glyoxylate pathway contributed to succinate formation. In a zero‐growth bioprocess using minimal medium devoid of complex additives and expensive supplements, we obtained a final titre of 60.4 gSucc l−1 with a maximum productivity of 20.8 gSucc l−1 h−1 and an overall volumetric productivity of 8.6 gSucc l−1 h−1 during the 7 h fermentation. The key performance indicators (titre, yield and productivity) of this first engineering approach in V. natriegens are encouraging and compete with costly tailored microbial production systems.