bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lip thickness effect on high bypass co-flowing jet mixing
Authors: R. Naren Shankar , V.G. Ganesan 
Published: April 2022

Purpose
The purpose of this study is to analyse numerically and experimentally the effects of lip thickness (LT) and bypass ratio on co-flowing nozzle under subsonic and correctly expanded sonic jet decay at different Mach numbers.

Design/methodology/approach
Co-flowing jets from co-flowing nozzles of different LTs, 0.2, 1 and 1.5 Dp (where Dp is the primary nozzle exit diameter = 10 mm), with an annular gap of 10 mm at main jet exit Mach numbers 0.6 have been studied experimentally and the other cases have been performed numerically. The co-flowing jet with 2 mm LT was used for comparison.

Findings
Co-flowing jet axial pitot pressure decay, axial static pressure decay, axial velocity decay, radial velocity decay and streamline velocity contours were analyzed. The results illustrate that the mixing of the co-flowing jet with profound LT is prevalent to the co-flowing jet with 2 mm LT, at all Mach numbers of the current study. Also, the LT of the co-flowing jet has a strong impact on jet mixing. Co-flowing jets with 10 mm and 15 mm LT with a constant co-flow width of 10 mm experience a considerably advanced mixing than co-flowing jets with 2 mm LT and a co-flow width of 10 mm.

Practical implications
The application of bypassed co-flow jet is in turbofan engine operates efficiently in modern civil aircraft.

Originality/value
All subsonic jets are considered correctly expanded with negligible variation in axial static pressure. However, in the present study, static pressure along the centerline varies sinusoidally up to 9% and 12% above and below atmospheric pressure, respectively, for primary jet exit Mach number 1.0. The sinusoidal variation is less for primary jet exit Mach numbers 0.6 and 0.8 in static pressure decay.
Interface management of offsite bathroom construction: a conceptual model
Authors: McCarney Michael , Goodier Chris Ian , Gibb Alistair 
Published: April 2022

Purpose
This paper aims to identify and discuss how process and people factors influence the successful implementation of organisational interface management in offsite bathroom construction.

Design/methodology/approach
A literature review identified 16 process and people factors. A mixed method approach was used to analyse data from eight offsite bathroom case study projects. A ranking approach determined the main process and people factors, consequently analysed using (Minitab) Frequency analysis, the Wilcoxon Signed Rank test and thematic analysis to establish the contributing sub-factors and their inter-relationships, to each other and to the literature. These factors and sub-factors formed the final conceptual model, bringing together interface management and offsite bathroom construction.

Findings
The nine factors instrumental to the conceptual model include six process factors: procurement, design management, supply chain management, health and safety, tolerance and quality and three people factors: communication, client/design team and project manager, reflecting the construction industry focus on hard processes over soft. The role of the project manager and communication, however, are the main factors which contribute to overall project success. Direct management of the offsite works by the contractor’s project manager is also highly significant.

Research limitations/implications
Limitations include the (UK) geographical focus of the research and the focus on bathroom pods in buildings.

Social implications
The research recognises three people (social) factors: communication, client/design team and project manager, with the first and third being the main factors which contribute to overall project success.

Originality/value
Originality stems from the focus on organisational interface management and how this relates to offsite bathroom construction (a practice gaining considerable momentum in industry) and the resultant model. Being grounded on more than one body of academic literature as well as 8 case studies and 82 industry interviews, there is value to both researchers and construction industry practitioners alike.
Searching for “rare diamonds”? Industrial districts and innovation in Spain and Italy
Authors: Boix-Domenech Rafael , Capone Francesco , Galletto Vittorio 
Published: April 2022

PurposeThis paper aims to test the existence of the so-called industrial district effect on innovation (iMID effect) in Spain and Italy and to compare the intensity of this effect between both countries. There is previous evidence of this effect for Spain, although, to the best of the authors’ knowledge, it has never been measured for Italy.Design/methodology/approachInnovation intensity by local production system is measured using patents per million employees and analysed using the mean, the median, 3D maps and statistical tests.FindingsIndustrial districts generate between a third and a quarter of all technological innovations in Spain and Italy. The evidence about the district effect in innovation in Spain is consistent with previous studies. The novelty is that there is also evidence of this effect for Italy and its intensity is higher than for Spain. Almost one-half of the industrial districts fit in the most innovative quartile of local production systems, and they are located in the most innovative part of each country.Research limitations/implicationsLimitations of this study include minor database issues. Implications include new focus on the general relevance of industrial districts as highly innovative local production systems and top innovators.Practical implicationsReorientation of territorial and innovation policies.Social implicationsEffect on development and well-being through technical progress.Originality/valueThis article provides, for the first time, to the best of the authors’ knowledge, a measurement of the industrial district effect on innovation in Italy. The paper compares the results between Spain and Italy and allows for generalization of previous evidence, concluding that highly innovative industrial districts are not “rare diamonds”, revealing as an alternative and an extraordinarily powerful place-based innovation model.
Design of a fractional-order chaotic secure communication circuit based on sliding mode theory and microcontroller
Authors: Zhou Zuanbo , Yu Wenxin , Wang Junnian , Zhao Yanming , Liu Meiting 
Published: April 2022

Purpose
With the development of integrated circuit and communication technology, digital secure communication has become a research hotspot. This paper aims to design a five-dimensional fractional-order chaotic secure communication circuit with sliding mode synchronous based on microcontroller (MCU).

Design/methodology/approach
First, a five-dimensional fractional-order chaotic system for encryption is constructed. The approximate numerical solution of fractional-order chaotic system is calculated by Adomian decomposition method, and the phase diagram is obtained. Then, combined with the complexity and 0–1 test algorithm, the parameters of fractional-order chaotic system for encryption are selected. In addition, a sliding mode controller based on the new reaching law is constructed, and its stability is proved. The chaotic system can be synchronized in a short time by using sliding mode control synchronization.

Findings
The electronic circuit is implemented to verify the feasibility and effectiveness of the designed scheme.

Originality/value
It is feasible to realize fractional-order chaotic secure communication using MCU, and further reducing the synchronization error is the focus of future work.
Multi-material topology optimization considering natural frequency constraint
Authors: Shah Vishrut , Pamwar Manish , Sangha Balbir , Kim Il Yong 
Published: April 2022

PurposeThe purpose of this paper is to propose an effective and efficient numerical method that can consider natural frequency in multi-material topology optimization (MMTO) and which is scalable for complex three-dimensional (3D) problems.Design/methodology/approachThe optimization algorithm is developed by combining custom FORTRAN code for MMTO with the open-source software Mystran, which is used as a finite element analysis (FEA) solver. The proposed algorithm allows the designer to shift the fundamental frequency of the design beyond a defined frequency spectrum from the initial designing phase. The methodology is formulated in a smooth and differentiable manner, with the sensitivity expressions, required by gradient-based optimization solvers, presented.FindingsNatural frequency constraint has been successfully implemented into MMTO. The use of open-source software Mystran as an FEA solver in the algorithm provides ability to solve complex problems. Mystran offers powerful built-in functions for eigenvalue extraction using methods like Givens, modified Givens, inverse power and the Lanczos method, which provide the ability to solve complex models. The algorithm is successfully able to solve both two- and three-material MMTO jobs for two-dimensional and 3D geometries.Originality/valueNatural frequency constraint consideration into topology optimization is very challenging due to three common issues: localized eigenmodes, mode switching and high computational cost. The proposed algorithm addresses these inherent issues, implements natural frequency constraint to MMTO and solves for complex models, which is hardly possible using conventional methods.
User innovation rings the bell for new horizons in e-health: a bibliometric analysis
Authors: Ghasemzadeh Khatereh , Escobar Octavio , Yordanova Zornitsa , Villasalero Manuel 
Published: April 2022

PurposeThe study examines the amplifying role of users in the e-healthcare sector and holistically show its current state and potential. The paper aims at contributing to the scientific literature with a comprehensive review of the current state of the art on the application of user innovation (UI) in the e-healthcare sector, as a solid step for discussing the potential, trends, managerial gaps and future research avenues in this field. Despite the crucial importance of the topic and increasing attention toward it in the last few years, there is a lack of comprehensive scrutiny on different angles of involving users in health technology innovations so far.Design/methodology/approachThis study combines two methods of bibliometric analysis and extensive content analysis of 169 journal articles on Scopus and Web of Science to unfold five research questions regarding the mechanisms of involving users, innovations characteristics and the role of users throughout the innovation process.FindingsA clear result of the applied methodology is the profiling of users involved in e-health innovations in seven categories. The results of this study shed light on the current practice of not involving users in all the stages of the innovation process of m-health, telemedicine, self-managing technologies, which is contrary to the best practices of the UI application.Research limitations/implicationsCollection of relevant studies due to lack of comprehensibility of the keywords.Practical implicationsThe offered propositions can act as a roadmap to potential research opportunities as well as to organize such innovations from a managerial perspective in particular healthcare organization managers and the middle managers operating at R&D sectors and policymakers.Originality/valueThis study is the first of its kind that digs out the application of UI strategies such as user-centered design in the context of e-healthcare and provides a bibliometric and extensive content analysis of the studies conducted in this theme over the years.
Universal emotional arc structure in advertisements and their favorability
Authors: Ghosh Aruni , Deb Madhurima 
Published: April 2022

Purpose
This study aims to propose a novel way to explore the narrative structure of advertisements, a nascent area of research, through the protagonist’s emotional arc progression.

Design/methodology/approach
The multi-methods approach is used. In Study 1, the authors explore the basic universal emotional arcs through the analysis of narrative advertisements from six key economies. In Studies 2 and 3, the authors experimentally test hypotheses concerning the narrative structure and viewers’ attitudes toward the narrative using representative samples (317 and 193 ads, respectively).

Findings
The authors identify five broad emotional arcs of the protagonist in audiovisual advertisements. Different emotional arcs are found to induce different attitudes in the audience. Narratives ending in a positive mode and the narrative arcs with higher emotional shifts are more favorably evaluated by the audience.

Research limitations/implications
The present study is limited to textual stimuli tested in a US population and does not consider protagonist characteristic portrayal.

Practical implications
Understanding consumer preferences for different emotional arcs can help practitioners to develop more clutter-breaking and relevant advertisements.

Originality/value
To the best of the authors’ knowledge, this study is the first to explore the narrative structure theory in the context of advertisements using a positivist approach.
“I would rather be informed than misinformed”: critical conversations supporting transnational religious identity across time and space
Authors: Deroo Matthew R. , Mohamud I. 
Published: April 2022

PurposeThe purpose of this paper is to examine how a transnational immigrant youth’s engagement on social media supported her identity formation and allowed space to advance more just framing of Islam across school and online communities.Design/methodology/approachThis qualitative study draws on data collected across two years, including interviews, classroom observations and social media posts. Using digital religion and counterstorying as a constructive theoretical frame, the authors asked: What was the role of social media in supporting a transnational immigrant youth’s critical media literacy practices within and beyond school. How, if at all, did these practices shift over time?FindingsFindings highlight how I. Mohamud used social media in support of her identity development as a female, Muslim youth in a political climate antithetical to such liberation and how through an online community she engaged in counter stories to negative framing of Islam.Originality/valueOur collaborative writing answers Lam and Warriner’s (2012) call for research exploring how individuals from migrant backgrounds interact with “diverse media representations and mobilize different interpretive frames for understanding societal events and personal experiences” (p. 207). Moreover, this study further answers El-Haj and Bonet (2012) call for research investigating “ways that youth inhabit particular identities in specific contexts and interactions and across time” (p. 41).
Occupational identity, work, psychological distress and gender in management: results from SALVEO study
Authors: Hamouche Salima , Marchand Alain 
Published: April 2022

PurposeThis paper aims to examine the contribution of occupational identity and gender in explaining psychological distress among managers. It proposes and tests empirically a theoretical model that integrates identity theory into occupational stress and gender research. It analyses the proposition that a low level of verification of role identity is associated with a high level of psychological distress and that gender plays a moderating role in the relationship between role identity verification and psychological distress.Design/methodology/approachMultilevel regression analyses were conducted on a sample of 314 managers employed in 56 Canadian firms.FindingsLow level of verification of one standard of managers’ role identity, namely, recognition, is significantly associated with managers’ psychological distress. It encloses monetary and non-monetary recognition, career prospects and job security. Notwithstanding, gender does not moderate the relationship between identity verification and psychological distress.Originality/valueStudies addressing the contributions of identity and gender in the explanation of managers’ psychological distress are sparse. This paper helps to expand the scope of management and workplace mental health research as well as gender-related research, by proposing a new approach for the study of managers’ psychological distress, by the integration of identity theory and the analysis of the moderating role of gender.
Task conflict and team performance: roles of expertise disparity and functional background diversity
Authors: Lee Eun Kyung (Elise) , Chung Wonjoon , Hong Woonki 
Published: April 2022

PurposeThe purpose of this study is to test a contingency model in which the relationship between task conflict and team performance depends on the extent to which team members differ in their levels of expertise and functional backgrounds.Design/methodology/approachData were obtained from 71 student teams that completed a semester-long entrepreneurial project.FindingsThe results support the moderating role of expertise disparity in the process through which task conflict contributes to team performance. Task conflict had a curvilinear effect (inverted-U) on team performance in teams with high expertise disparity. In contrast, in teams with low expertise disparity, the relationship between task conflict and team performance was found to be linear and positive. The moderating role of functional background diversity was not supported.Research limitations/implicationsThis paper shows that the relationship between task conflict and team performance can exist in both a linear and a curvilinear fashion, and that what determines the form of the relationship has to do with a team’s diversity characteristics. The focus of future conflict research should be whether and how teams can realize the possible beneficial effects of task conflict, not whether task conflict is simply good or bad.Practical implicationsManagers may deliberately consider the differences in expertness among members when creating teams or assigning members to a team. Further, they may want to avoid extensive task conflict when a team’s expertise levels are unevenly distributed to lessen expected performance loss.Originality/valueThis study’s examination of the roles of two moderators in catalyzing the processes through which potential effects of task conflict are realized enhances the understanding of equivocal results in conflict research. The empirical evidence that this study provides informs a long-standing debate in the conflict literature – whether task conflict is functional or dysfunctional for teams – in a new, insightful way.
The selection of face mask as a personal protective equipment under the spherical fuzzy environment considering technical and material properties
Authors: Gül Sait , Sivri Çağlar , Aksu Ozan Rıdvan 
Published: April 2022

PurposeThe purpose of this paper is to determine which criteria should be taken into account while choosing face masks for pandemic times and to what extent their effects are.Design/methodology/approachNine face mask alternatives were evaluated based on the assessments of their performance with respect to twelve attributes. Seven experts were asked to evaluate the mask alternatives and the influences among attributes. In gathering expert judgments, spherical fuzzy number-based linguistic terms were utilized in the study to provide a more comprehensive representation domain to them.FindingsAccording to the results, the most important attributes are found as material type, cost and bacteria–virus protection level. The best face mask is N95, which is followed by respirators and surgical masks.Research limitations/implicationsThe implication of the research is to evaluate face masks in terms of criteria such as physical, performance, protection and cost to decide on what basis they were selected as a personal protective equipment (PPE) based on expert assessments. This is useful in selection of the right face mask with optimum performance and provides guidance to the general public and profession specific groups for this purpose. The face mask companies might be also benefitted from the implications of the present study in their design and research and development (R&D) operations.Originality/valueThe preference ranking of the face mask alternatives has not been studied in detail yet in the literature. Focusing on this issue, the present study provides a comprehensive assessment of the selection criteria of face masks in the pandemic era.
Academics' attitudes towards online education amidst the Covid-19 outbreak
Authors: Dassanayaka D.M.C. , Weerasinghe I.M.S. , Dahanayaka S.N.S. , Dedunu H. Harshani , Athurupana KAHMK , Muthuweera N.K.G. 
Published: April 2022

PurposeThe present scenario of the Covid-19 pandemic, together with technological advancements, has provoked unprecedented turbulence in the education system, notably in universities, disrupting their conventional teaching and learning processes. Despite government support, teachers and students faced numerous challenges in the online teaching and learning process than expected. Extensive research has been undertaken to investigate the context of online education from the perspective of students, but less emphasis has been given to examining the views of teachers. Thus, the study aimed to explore attitudes of academics towards online teaching during the Covid-19 outbreak.Design/methodology/approachThe study was conducted in Sri Lanka, with the population consisting of academics representing all state universities. An email survey was conducted randomly, and 355 academics responded to a Google form, out of which 332 refined questionnaires were used for analysis. Multi-item reflective indicators were used to operationalize the research constructs on a 7-point Likert scale. The face, content, and construct validities were ensured appropriately. The reflective-reflective two-stage hierarchical approach with disjoint option was applied to analyze the data using the Partial Least Squares Structural Equation Modelling (PLS-SEM) model. After rigorous and careful examination of data, the descriptive statistics revealed that the university academics are pretty distressed with their Internet connections and facilities at home to conduct online lectures.FindingsActive student participation was just above the average, while teacher's attitudes towards online education, their willingness to continue it further seem quite unsatisfactory. Teacher readiness for online education appears to be acceptable only to a certain extent. The key findings of the study disclosed that the attitudes towards online teaching are determined by perceived usefulness, teacher readiness, perceived student participation whereas active student participation, a conducive teaching environment and institutional support have no significant impact on attitude towards online teaching. Further, the study contributed to the education literature analyzing online education in the Sri Lankan context.Originality/valueThis study sparked the debate and contributed to the literature exploring the concept from the side of teachers in which attitudes of teachers towards online teaching in Sri Lankan Contest.