bluuebunny/crossref_metadata_2025_split huggingface dataset:
A generalization of Ascoli–Arzelá theorem inCnwith application in the existence of a solution for a class of higher-order boundary value problem
Authors: Benhiouna Salah , Bellour Azzeddine , Amiar Rachida 
Published: May 2022

PurposeA generalization of Ascoli–Arzelá theorem in Banach spaces is established. Schauder's fixed point theorem is used to prove the existence of a solution for a boundary value problem of higher order. The authors’ results are obtained under, rather, general assumptions.Design/methodology/approachFirst, a generalization of Ascoli–Arzelá theorem in Banach spaces inCnis established. Second, this new generalization with Schauder's fixed point theorem to prove the existence of a solution for a boundary value problem of higher order is used. Finally, an illustrated example is given.FindingsThere is no funding.Originality/valueIn this work, a new generalization of Ascoli–Arzelá theorem in Banach spaces inCnis established. To the best of the authors’ knowledge, Ascoli–Arzelá theorem is given only in Banach spaces of continuous functions. In the second part, this new generalization with Schauder's fixed point theorem is used to prove the existence of a solution for a boundary value problem of higher order, where the derivatives appear in the non-linear terms.
The Nest: post evaluation study on intentional learning space in public housing Malaysia
Authors: Kusumo Camelia May Li , Letchamanan Hema , Lee Sze-ee , Gooi Liang Jun 
Published: May 2022

PurposeAligned with the United Nations 2030 agenda of leaving no one behind, a project called The Nest was initiated to create an in-house intentional learning space at two public housings in Klang Valley. In a small unit of public housing, most children in these houses sit on the floor in the living room to do their schoolwork or study with the TV switched on. Poor indoor environmental quality and lack of personal space are among the main reasons that lead to children not being able to study at home comfortably.Design/methodology/approachThe research employed a quasi-experimental approach as the research field setting was not randomly assigned. Observation on the change in the quality of space and post-evaluation interviews with beneficiaries were conducted.FindingsThe findings show that besides the tangible space that the Nest project has created, it also has created in-tangible space. It has shown that even small spatial changes to existing spaces could improve children's active learning and the participation of parents in their children's learning.Research limitations/implicationsThis study focuses on the home learning experience and parental involvement in their children's learning, so perhaps future research can be done to measure the impact of home learning space on academic achievement.Practical implicationsThe research outcomes show that a good quality of learning space influences the children's learning experience at home and the parents' involvement. It will also contribute to the development of the building regulation for high-rise affordable housing in Malaysia. Particularly in improving the optimum requirement to achieve better comfort quality for the learning space at the residential unit.Social implicationsThe Nest project will contribute to raising the awareness among all residents of public housing on the importance of in-house learning space and encourage them to build their own learning spaces through the Do-It-Yourself Guidelines.Originality/valueThe research outcomes show that both parental involvement and the quality of learning space influence the children's learning experience at home. It will contribute to the development of the building regulation for high-rise affordable housing in Malaysia. Particularly in improving the optimum requirement to achieve better comfort quality for the learning space at the residential unit.
New approach for imposing the nonlinear floating potential boundary condition in the Poisson-continuity coupled system
Authors: Cheng Qiwen , Zou Jun , Li Benliang , Lu Jun 
Published: May 2022

Purpose
The purpose of this study is to develop a new approach for simulating the ion flow field with the floating conductors based on the existing inversion method.

Design/methodology/approach
The space charge keeps charging the floating conductors until the dynamic balance is reached. The corresponding floating potential boundary condition is linearized as the combination of the equipotential constraints and natural boundary condition, which can be directly imposed in the inversion process.

Findings
The numerical results demonstrate that the modified inversion algorithm performs well in the ion flow field with the floating conductors and the floating potential converges within five steps’ iterations. The proposed approach is applied to investigate the effect of the grounded line to the floating conductors in the practical high voltage direct current (HVDC) transmission lines.

Originality/value
The modified inverse algorithm provides a general way to deal with the Kapzov hypothesis and the floating boundary condition simultaneously within one loop, which can be applied to the multiphysics systems with different kinds of irregular boundary conditions.
Integrated numerical simulation of an electromagnetic transmission line galloping excitation test system
Authors: Zhang Li , Ruan Jiangjun , Huang Daochun 
Published: May 2022

Purpose
This paper aims to establish the mathematical model and solve the complex calculation multi-field coupling problem for an electromagnetic overhead transmission line galloping excitation test system.

Design/methodology/approach
An electromagnetic excitation test system is introduced. To calculate the vibration response of the transmission line, a transient coupled finite element model containing electromagnetic repulsive mechanism and transmission line system was established. Considering the advantages of Newmark-ß algorithm and fourth-order Runge–Kutta algorithm, the two algorithms are combined to solve the model. Compared with the simulation results of existing commercial finite element software, the accuracy of the calculation model of electromagnetic force and wire vibration response are verified.

Findings
Comparison results show that the proposed calculation model can accurately obtain the force of electromagnetic mechanism and the vibration response of the overhead power lines, and improve the calculation efficiency. The calculation results show that vibration under electromagnetic excitation presents a double half-wave mode, and the galloping amplitude varies according to the charging voltage.

Originality/value
This paper built the transient simulation model for a galloping test system. The Newmark-ß algorithm and the fourth-order Runge–Kutta algorithm are used to solve the model. The research results are of great significance for the actual galloping test system design.
On the interaction between the design and operation under uncertainties of a simple distributed energy system
Authors: Radet Hugo , Sareni Bruno , Roboam Xavier 
Published: May 2022

Purpose
The purpose of this study is toward a better understanding of the interplay between the design and the operation under uncertainties of a simple distributed energy system (DES), by analyzing the sensitivity of the operation strategy over the size of the assets.

Design/methodology/approach
A two-step framework is developed in this work: first, the equipment sizes are obtained solving an integrated design approach where an operation strategy Fd is embedded in a design loop; then, once the sizes have been fixed, the DES is evaluated with an operation strategy Fa (which can be the same as Fd). The operation strategies Fd and Fa are not necessarily the same, so the objective of the paper is to study the interplay between the design and the operation by varying the optimality level of the operation strategies in both phases.

Findings
The results show that the design of DES cannot be approached without considering its close relationship with the operation strategy. Indeed, the design method needs to be chosen according to the performance of the operation policy finally used in real life: no matter if the operation strategies are the same in both phases but they must lead to a similar level of optimality in terms of operating performance.

Originality/value
The originality of this work is to shed light on the importance of the operation strategy in the design procedure as it seems rarely addressed, to the best of the authors’ knowledge, in the literature. Indeed, most of the paper dealing with stochastic design of DES solves single large two-stage problems without discussing the way power flows are finally controlled in real life. The optimal design and operation of DES is rarely addressed conjointly, this study aims at bridging the gap between these two isolated scientific communities.
Organisational justice mechanisms’ mediating leadership style, cognition- and affect-based trust during COVID-19 in South Africa
Authors: Visser Schalk Willem Jacobus , Scheepers Caren Brenda 
Published: May 2022

PurposeThis study aims to investigate how different kinds of leadership styles (transformational and transactional leadership) influence different components of trust (affect-based and cognition-based trust), mediated by organisational justice mechanisms (distributive, procedural and interactional justice) during COVID-19 conditions in South Africa.Design/methodology/approachThis study conducted a quantitative study by collecting survey data from 366 leaders in three organisations in South Africa, using valid and reliable scales. Given the number of latent constructs, the statistical technique used for this research was partial least squares-structural equation modelling, which enabled the authors to evaluate the strength and significance of the mediating relationships.FindingsFindings show unexpectedly that neither distributive nor procedural justice has any significant mediating effect between transformational and transactional leadership and between the components of trust (affect-based and cognition-based trust). However, interactional justice was found to have a significant positive mediating effect between transactional leadership and affect-based trust as well as cognition-based trust. The same did not apply to transformational leadership.Originality/valueGiven the context of this study, which was conducted during the COVID-19 pandemic, these findings support the notion that it is the responsibility of leaders in organisations to communicate effectively, clearly and transparently to their followers at all times but particularly during times of extreme uncertainty. These increased levels of perceived fairness result in the development of trust within the organisation.
Examining the concurrent impact of teaching and assessment format on undergraduate students' academic performance in marketing
Authors: Livas Christos , Karali Nansy 
Published: May 2022

PurposeBy focusing on a Greek traditional learning university, during and post Covid-19 restrictions, the study aims at examining the concurrent effects of teaching and assessment format on students' academic performance. The inclusion of case studies in course assessment post Covid-19 restrictions is also expected to give a rough insight into students' employability skills and workplace readiness.Design/methodology/approachThe academic performance of 489 undergraduate students, as determined by the grades they earned, was measured in the final exams of business-to-business marketing and integrated marketing communication courses, held in January 2021 and 2022 at a Greek public university. The primary predictor variable or interest was “teaching and assessment format”, and took two values: (1) online teaching with multiple-choice assessment format (during Covid-19 restrictions) and (2) traditional classroom teaching with in-person case study and open-ended assessment format (post Covid-19 restrictions).FindingsGrades were found to be affected by the participants' year of study, the type of marketing course, in which they were examined, and the teaching and assessment format employed. Either in whole or by gender, students appear to perform significantly worse in the traditional teaching with in-person case study and open-ended questions assessment format.Practical implicationsGood pedagogical practice in the use of digital technology is advised to incorporate diverse teaching tools and assessment methods.Originality/valueExamination of the concurrent effects of teaching and assessment on academic performance unveils significant variation in students' academic performance under different formats, which may be attributable to multiple reasons.
The aerodynamic effects of blade pitch angle on small horizontal axis wind turbines
Authors: Kaya Mehmet Numan , Uzol Oguz , Ingham Derek , Köse Faruk , Buyukzeren Riza 
Published: May 2022

PurposeThe purpose of this paper is to thoroughly investigate the aerodynamic effects of blade pitch angle on small scaled horizontal axis wind turbines (HAWTs) using computational fluid dynamics (CFD) method to find out the sophisticated effects on the flow phenomena and power performance.Design/methodology/approachA small HAWT is used as a reference to validate the model and examine the aerodynamic effects. The blade pitch angle was varied between +2 and −6 degrees, angles which are critical for the reference wind turbine in terms of performance, and the CFD simulations were performed at different tip speed ratio values, λ = 2, 3, 4, 5, 6, 7, 9 and 10.5 to cover the effects in various conditions. Results are examined in two different aspects, namely, general performance and the flow physics.FindingsThe power performance varies significantly according to the tip speed ratio; the power coefficient increases up to a certain pitch angle at the design tip speed ratio (λ = 6); however, between λ = 2 and 4, the more the blade is pitched downwards, the larger is the power coefficient, the smaller is the thrust coefficient. Similarly, for tip speed ratios higher than λ = 8, the positive effect of the low pitch angles on the power coefficient at λ = 6 reverses. The flow separation location moves close to the leading edge at low tip speed ratios when the blade is pitched upwards and the also tip vortices become more intense. In conclusion, the pitch control can significantly contribute to the performance of small HAWTs depending on different conditions.Originality/valueIn the literature, only very little attention has been paid to the aerodynamic effects of pitch angle on HAWTs, and no such study is available about the effects on small HAWTs. The change of blade pitch angle was maintained at only one degree each time to capture even the smallest aerodynamic effects, and the results are presented in terms of the power performance and flow physics.
Why do consumers free ride? Investigating the effects of cognitive effort on postpurchase dissonance
Authors: Nosi Costanza , Zollo Lamberto , Rialti Riccardo , Ciappei Cristiano 
Published: May 2022

Purpose
Building on the theoretical paradigms of consumer free-riding and cognitive dissonance, this study aims to evaluate whether consumers’ cognitive effort when making a purchase decision impacts upon the relationship between free-riding habits and postpurchase cognitive dissonance.

Design/methodology/approach
To explore the relationship between cross-channel free-riding, cognitive efforts and cognitive dissonance, a framework was conceptualized and empirically tested on a sample of 518 Italian consumers. Covariance-based structural equation modeling and bootstrapped mediation analysis was performed with the PROCESS macro.

Findings
Results show that the more cognitively involved a free-riding consumer is, the more he/she will experience postpurchase cognitive dissonance.

Originality/value
Modern consumers habitually finalize their purchase activities through multiple different channels. The abundance of e-commerce/online platforms does indeed offer consumers a plethora of alternatives to physical/offline stores. Hence, consumers have been seen to act as “free-riders.” It is becoming more and more common for consumers to seek information in physical stores and then purchase a product online more conveniently. This notwithstanding, it has emerged that free-riding consumers tend to experience cognitive dissonance – which is a sensation of emotional discomfort – after making their purchases. The causes of this phenomenon are yet to be fully unpacked.
Regenerative tourism: transforming mindsets, systems and practices
Authors: Dredge Dianne 
Published: May 2022

PurposeThe purpose of this paper is to examine the mindset shift, systems change and boundary spanning practices needed to transition to a regenerative approach in tourism. The paper seeks to deliver concrete ways to shift thinking and transition to a regenerative paradigm.Design/methodology/approachThis viewpoint paper defines regenerative tourism, explores its principles and the levers for driving transformational change in tourism. It outlines what a conscious approach to regenerative tourism entails and outlines working principles for regenerative tourism. The paper concludes by identifying five key areas for reflection that seek to challenge established thinking and practice.FindingsThe reinvention of tourism requires work in three key areas: systems change, mindset shift and practice. Three findings are summarised as: (1) Regenerative tourism requires a shift in social-ecological consciousness and depends on our capacity to evolve our thinking from “me” to “we” and to develop compassion, empathy and collaborative action. (2) Scientific management is inconsistent with the transition to regeneration. Tourism must be managed as a complex adaptive system and overcome the challenges of individualism, reductionism, separation and marketisation associated with scientific thinking. (3) Regenerative tourism requires a deeply engaged bottom-up approach that is place-based, community-centred and environment-focused.Originality/valueThis paper shares the reflections, working principles and recommendations of The Tourism CoLab and is based on 30 years of experience as a consultant, policy analyst, educator, researcher, professor and now as founder of two tourism social enterprises. With the luxury of reflection and the distance from higher education that many do not have, the author shares her approach to shifting mindsets and driving transformative change.
Optimization of ink consumption in screen printing within color difference limits
Authors: Özdemir Lutfi , Kurt Mustafa Batuhan , Akgül Ahmet , Oktav Mehmet , Nayci Duman Mujgan 
Published: May 2022

Purpose
The purpose of this paper is to optimize the key parameters (mesh count, paper type and ink type) in screen printing, which are affecting the printed ink volume. The objective of the optimization was to maximize the color reliability by decreasing the color difference (ΔE value) of the prints while minimizing the ink consumption. Screen printing is still dominating the printing industry to make cost-effective production when high volumes are needed.

Design/methodology/approach
The experiment was designed using the Taguchi method, and the samples were prepared with screen-printing by using the standard squeegee angle and pressure. The effect of mesh count, ink type and paper type on ink consumption was evaluated with using analysis of variances and main effects plots of S/N ratio and standard deviation.

Findings
The factors ink type, paper type and mesh count were found significant for ink consumption due to their Probability (P) values which were lower than 0.05. It was determined that the mesh count was the most critical variable with the analysis of variance. The analysis showed that the selection of an optimum mesh count was the key to controlling the amount of the deposited ink. Although mesh counts were inversely proportional with the ink consumptions, they did not affect the color differences as expected.

Originality/value
The optimization of process parameters, that are most effective on the print quality, is necessary to minimize the ink usage and lower the costs and environmental impact without exceeding the desired ΔE value limits.
Numerical and experimental analysis of bead cross-sectional geometry in fused filament fabrication
Authors: Balta Efe C. , Altınkaynak Atakan 
Published: May 2022

Purpose
This paper aims to develop experimentally validated numerical models to accurately characterize the cross-sectional geometry of the deposited beads in a fused filament fabrication (FFF) process under various process conditions.

Design/methodology/approach
The presented numerical model is investigated under various fidelity with varying computational complexity. To this end, comparisons between the Newtonian, non-newtonian, isothermal and non-isothermal computational models are presented for the extrusion of polylactic acid material in an FFF process. The computational model is validated through an experimental study on an off-the-shelf FFF printer. Microscope images of experimentally printed FFF bead cross-sections corresponding to various printing conditions are digitally processed for the validation. In the experimental study, common practical printing conditions for an FFF process are tested, and the results are compared to the numerical model.

Findings
Microscope image analyses of the cross-sectional geometries of deposited beads show that the numerical model provides a precise characterization of the cross-sectional geometry under varying process parameters in terms of the cross-section outline, bead height and width. The results show that the nozzle-to-table distance has a great effect on the bead shape when compared to the extrusion rate at a given nozzle-to-table distance. Comparison of the various computational models show that the non-Newtonian isothermal model provides the best tradeoff between computational complexity and model accuracy.

Originality/value
The authors provide detailed computational models, including the extruder nozzle geometry for cases ranging from Newtonian isothermal models to non-Newtonian non-isothermal models with experimental validation. The validation study is conducted for practical process parameters that are commonly used in FFF in practice and show that the computational models provide an accurate depiction of the true process outputs. As the developed models can accurately predict process outputs, they can be used in further applications for process planning and parameter tuning.
Speaking to the hearts of the customers! The mediating effect of customer loyalty on customer orientation, technology orientation and business performance
Authors: Ismail Ismail Juma 
Published: May 2022

PurposeThis paper examined mediating effect of customer loyalty on the influence of customer orientation and technology orientation on the performance of small and medium-sized enterprises (SMEs).Design/methodology/approachThis study adopted and modified items from previous studies. Also, data were analyzed using structural equation modeling (SEM). Additionally, a PROCESS Macro mediation test was used.FindingsThe study's findings indicated that customer orientation and technology orientation positively and significantly affect customer loyalty. Moreover, the findings indicated that customer loyalty has a positive and significant effect on the performance of SMEs. Finally, customer loyalty was found to mediate the influence of customer orientation and technology orientation on the performance of SMEs.Practical implicationsThe study recommends on business performance improvement through enhancing customer and technology orientations and customer loyalty. So, SMEs should make sure their internal environment is conducive to accommodate customer and technology orientations, which will help them come up with effective ways to get loyal customers and improve their business.Originality/valueThe study adds value to the existing literature by introducing customer loyalty as an intervening variable between the effect of customer orientation and technology orientation on business performance of SMEs.