bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of machining parameters for abrasive water jet drilling of carbon fiber-reinforced polymer composite material using Taguchi method
Authors: Karatas Meltem Altin , Gokkaya Hasan , Nalbant Muammer 
Published: October 2019

Purpose
The aim of this paper is to optimize the machining parameters to obtain the smallest average surface roughness values during drilling of the carbon fiber-reinforced polymer (CFRP) composite material with abrasive water jet (AWJ) and analyze the damage of the delamination.

Design/methodology/approach
CFRP composite material had been fabricated having fiber orientations frequently used in the aerospace industry (0°/45°/90°/−45°). Three different stand-off distances (1, 2 and 3 mm), three different water pressures (1,800, 2,800 and 3,800 bar) and three different hole diameters (4, 8 and 12 mm) were selected as processing parameters. The average surface roughness values were obtained, and delamination damage was then analyzed using Taguchi optimization. Drilling experiments were performed using the Taguchi L27 orthogonal array via Minitab 17 software. The signal/noise ratio was taken into account in the evaluation of the test results. Using the Taguchi method, the control factors giving the mean surface roughness values were determined. Analysis of variance was performed using the experimental results, and the effect levels of the control factors on the average surface roughness were found.

Findings
It was found that water pressure and hole diameter had a higher effect on average surface roughness, while water pressure and stand-off distance were effective on delamination.

Practical implications
Owing to their excellent thermal and mechanical properties, the CFRP composite materials show greater potential for their applications in aircraft and aerospace industry.

Originality/value
The novel approach is to reduce cost and spent time using Taguchi optimization as a result of AWJ drilling the material in this fiber orientation ([0°/45°/90°/−45°]s, which is often used in the aerospace industry).
Mobile (shopping) commerce intention in central Asia
Authors: Chung Kim Choy 
Published: October 2019

PurposeAlthough East Asia and South East Asia have seen growth in mobile commerce activities, the uptake of such activities in Central Asia has been relatively low. For insight, the purpose of this paper is to investigate the impact of culture, innovation characteristics and concerns about order fulfillment on mobile commerce (shopping) intention in Central Asia.Design/methodology/approachIn total, 779 questionnaires were collected (via mall-intercept method) from cities in Kazakhstan, Kyrgyzstan and Uzbekistan. The data were then subjected to two-step structural equation modeling procedures (using SPSS AMOS V.25) for hypothesis testing.FindingsThis study revealed that innovation characteristics, system-based trust (trust in mobile technology), and concerns about order fulfillment affected mobile commerce intention in Central Asia. The strong uncertainty avoidance characteristics of societies in the region mean potential adoptee place great emphasis on trialability and security of mobile commerce. Uncertainty avoidance correlated strongly with concerns about order fulfillment, thereby significantly impacting mobile commerce intention. Power distance and collectivism correlated with observability as factors affecting mobile commerce intention. The innovation characteristics of compatibility, complexity and relative advantage directly impact mobile commerce intention in Central Asia.Research limitations/implicationsThere are several limitations in this paper. First, the data in this study are limited to Kazakhstan, Kyrgyzstan and Uzbekistan. This might affect the generalization of this study’s findings across the whole Central Asia region. Second, the respondents in this study are exposed to mobile shopping for less than 30 min before been asked to complete the survey. This might affect respondent’s confidence in mobile commerce. Future study might involve the rest of Central Asia (Tajikistan, Afghanistan and Turkmenistan). Future study might also want to investigate the impact of Web assurance seal on mobile commerce intention in Central Asia.Practical implicationsManagerial/marketing implications and recommended strategies in this study would be useful for businesses (aspirant e-vendors) in Central Asia.Originality/valueThere is limited study about mobile commerce in Central Asia. Furthermore, extant literature on mobile commerce in the region lacked age varieties or lacked multi-national and logistical perspective. This is important given the wide geographical spread of the region. This study addressed these gaps by collecting data from all segments of society in Kazakhstan, Kyrgyzstan and Uzbekistan to test propositions regarding innovation characteristics, culture, and concerns about order fulfillment as factors impacting mobile commerce intention in Central Asia.
A gradient algorithm for the identification of interconnected discrete time varying systems
Authors: Ghoul Yamna 
Published: October 2019

Purpose
An identification scheme to identify interconnected discrete-time (DT) varying systems.

Design/methodology/approach
The purpose of this paper is the identification of interconnected discrete time varying systems. The proposed technique permits the division of global system to many subsystems by building a vector observation of each subsystem and then using the gradient method to identify the time-varying parameters of each subsystem. The convergence of the presented algorithm is proven under a given condition.

Findings
The effectiveness of the proposed technique is then shown with application to a simulation example.

Originality/value
In the past decade, there has been a renewed interest in interconnected systems that are multidimensional and composed of similar subsystems, which interact with their closest neighbors. In this context, the concept of parametric identification of interconnected systems becomes relevant, as it considers the estimation problem of such systems. Therefore, the identification of interconnected systems is a challenging problem in which it is crucial to exploit the available knowledge about the interconnection structure. For time-varying systems, the identification problem is much more difficult. To cope with this issue, this paper addresses the identification of DT dynamical models, composed by the interconnection of time-varying systems.
Perceived organizational support: the interactive role of coworkers’ perceptions and employees’ voice
Authors: Stinglhamber Florence , Ohana Marc , Caesens Gaëtane , Meyer Maryline 
Published: October 2019

Purpose
The purpose of this paper is to investigate whether a focal employee’s perception of organizational support (POS) is shaped by the social context or, more specifically, by his/her coworkers’ POS. The authors further aim to identify the conditions under which coworkers’ POS may have more influence or, on the contrary, less or even no influence.

Design/methodology/approach
Data were obtained from questionnaires distributed among a sample of 195 employees and among their supervisors.

Findings
Coworkers’ levels of POS are positively related to the focal employee’s POS with positive consequences in terms of job satisfaction and, finally, organizational citizenship behaviors. This influence of coworkers’ POS is strengthened when the focal employee experiences low voice in the workplace.

Research limitations/implications
Overall, this research contributes to organizational support theory by showing that POS may also develop based on a socially constructed process and not only on an individual-level psychological process.

Practical implications
Our findings have practical implications for HR policies employed by practitioners to socialize newcomers and to manage perceived support in a context of organizational change.

Originality/value
Building on a few recent studies suggesting that the social context may influence employees’ perceptions of organizational support, the present study is the first to show that the influence of the social context is more likely to occur under specific conditions, i.e. when employees experience low voice.
Investigating the relationship between managerialist employment relations and employee turnover intention
Authors: Oruh Emeka Smart , Mordi Chima , Ajonbadi Akeem , Mojeed-Sanni Bashir , Nwagbara Uzoechi , Rahman Mushfiqur 
Published: October 2019

PurposeThe purpose of this paper is to investigate the relationship between managerialist employment relations and employee turnover intention in Nigeria. The study context is public hospitals in Nigeria, which have a history of problematic human resource management (HRM) practice, a non-participatory workplace culture, managerialist employment relations and a high employee turnover intention.Design/methodology/approachBased on a qualitative, interpretive approach, this paper investigates the process by which Nigerian employment relations practices trigger the employee turnover intention of doctors using 33 semi-structured interviews with key stakeholders in public hospitals.FindingsThis study found that Nigeria’s managerialist employment relations trigger the employee turnover intention of medical doctors. Additionally, it was found that although managerialist employment relations lead to turnover intention, Nigeria’s unique, non-participatory and authoritarian employment relations system exacerbates this situation, forcing doctors to consider leaving their employment.Research limitations/implicationsStudies on the interface between managerialism and employment relations are still under-researched and underdeveloped. This paper also throws more light on issues associated with managerialist employment relations and human resources practice including stress, burnout and dissatisfaction. Their relationship with doctors’ turnover intention has significant implications for employment policies, engagement processes and HRM in general. The possibility of generalising the findings of this study is constrained by the limited sample size and its qualitative orientation.Originality/valueThis paper contributes to the dearth of studies emphasising employer–employee relationship quality as a predictor of employee turnover intention and a mediator between managerialist organisational system and turnover intention. The study further contributes to the discourse of employment relations and its concomitant turnover intention from developing countries’ perspective within the medical sector.
The impact of heterogeneous anisotropy of porous media on density-driven convection
Authors: Li Qian , Cai Weihua , Tang Xiaojing , Chen Yicheng , Li Bingxi , Chen Ching-Yao 
Published: October 2019

Purpose
The aim of this study is to numerically simulate the density-driven convection in heterogeneous porous media associated with anisotropic permeability field, which is important to the safe and stable long term CO2 storage in laminar saline aquifers.

Design/methodology/approach
The study uses compact finite difference and the pseudospectral method to solve Darcy’s law.

Findings
The presence of heterogeneous anisotropy may result in non-monotonic trend of the breakthrough time and quantity of CO2 dissolved in the porous medium, which are important to the CO2 underground storage.

Originality/value
The manuscript numerically study the convective phenomena of mixture contained CO2 and brine. The phenomena are important to the process of CO2 enhanced oil recovery. Interesting qualitative patterns and quantitative trends are revealed in the manuscript.
Optimization of four models flatbread bakery machines in Iran
Authors: Sadripour Soroush , Estajloo Mohammad , Hashemi Seyed Abdolmehdi , Chamkha Ali J. , Abbaszadeh Mahmoud 
Published: October 2019

Purpose
The purpose of this study is to reduce energy consumption in bakeries. Due to fulfill this demand, quite a few parameters such as energy and exergy efficiency, energy waste and fuel consumption by different traditional flatbreads bakeries (Sangak, Barbari, Taftun and Lavash should be monitored and their roles should not be neglected.

Design/methodology/approach
In the present study, experimental measurements and mathematical modeling are used to scrutinize and investigate the effects of the aforementioned parameters on energy consumption by bakeries.

Findings
The results show that by doing reported methods in this paper, the wasted energy of the walls can be decreased by about 65 per cent; and also, by controlling the combustion reaction to perform with 5 per cent excess air, the wasted energy of excess air declines by about 90 per cent. And finally, the energy and exergy efficiency of bakeries is increased, and as a result, the annual energy consumption of Sangak, Barbari, Taftun and Lavash bakeries diminish about 71, 59, 57 and 40 per cent, respectively.

Originality/value
As evidenced by the literature review, it can be observed that neither numerical studies nor experimental investigations have been conducted about energy and exergy analyses of Iranian machinery traditional flatbread bakeries. It is clear that due to a high preference of Iranians to use the traditional bread and also the popularity of baking this kind of bread in Iran, if it is possible to enhance the traditional oven conditions to decrease the loss of natural gas instead of industrializing the bread baking, the energy consumption in the country can be optimized.
Assessing building performance in residential buildings using BIM and sensor data
Authors: Rogage Kay , Clear Adrian , Alwan Zaid , Lawrence Tom , Kelly Graham 
Published: October 2019

Purpose
Buildings and their use is a complex process from design to occupation. Buildings produce huge volumes of data such as building information modelling (BIM), sensor (e.g. from building management systems), occupant and building maintenance data. These data can be spread across multiple disconnected systems in numerous formats, making their combined analysis difficult. The purpose of this paper is to bring these sources of data together, to provide a more complete account of a building and, consequently, a more comprehensive basis for understanding and managing its performance.

Design/methodology/approach
Building data from a sample of newly constructed housing units were analysed, several properties were identified for the study and sensors deployed. A sensor agnostic platform for visualising real-time building performance data was developed.

Findings
Data sources from both sensor data and qualitative questionnaire were analysed and a matrix of elements affecting building performance in areas such as energy use, comfort use, integration with technology was presented. In addition, a prototype sensor visualisation platform was designed to connect in-use performance data to BIM.

Originality/value
This work presents initial findings from a post occupancy evaluation utilising sensor data. The work attempts to address the issues of BIM in-use scenarios for housing sector. A prototype was developed which can be fully developed and replicated to wider housing projects. The findings can better address how indoor thermal comfort parameters can be used to improve housing stock and even address elements such as machine learning for better buildings.
Push and pull factors influencing Mainland Chinese MEd students in Hong Kong
Authors: Cheung Alan , Guo Xin , Wang Xiaorui , Miao Zhuang 
Published: October 2019

Purpose
The purpose of this paper is to examine the key factors affecting Mainland Chinese students pursuing a Master of Education degree in Hong Kong on their study abroad decision and return intentions.

Design/methodology/approach
The current study employed a mixed-methods approach to investigate factors that affect Mainland Chinese students pursuing MEd degrees in Hong Kong. Participants were first invited to fill out a questionnaire. After collecting and analyzing the survey data, in-depth interviews with a selected group of students were carried out by the research team to obtain useful qualitative data to triangulate the survey findings. A purposeful and convenience sampling method, carried out through the personal network of the research team, was used to recruit MEd Mainland Chinese students in Hong Kong to participate in the current study.

Findings
The findings provided compelling evidence that Hong Kong was an attractive study destination to this particular group of MEd Chinese students. The findings also indicated that academic factors were more important than social, cultural and economic factors when it came to choosing their study destination. In contrast to previous studies, participants expressed a much stronger desire to return home upon graduation. The three most influential predictors of their decision to return were the lack of a Hong Kong teaching certificate (r=+0.36), the opportunity to contribute to their hometown (r=+0.31) and the inclination to be closer to family and friends (r=+0.20).

Originality/value
While a number of studies have been carried out to study why Mainland Chinese students chose Hong Kong as their study destination to pursue their teacher training degree, none of these studies focused exclusively on fee-paying MEd Chinese students. Hong Kong is facing keen competition from both traditional host countries and emerging host countries to recruit students from Mainland China. It is therefore crucial to understand the needs of these Mainland Chinese students in a competitive, globalized, tertiary education market, as the satisfaction of students, in the form of positive discussion among alumni, promotes a university’s reputation and sustains its advantage in attracting students.
The creative chain of activities towards educational management transformation
Authors: Lemos Monica , Liberali Fernanda 
Published: October 2019

PurposeThe purpose of this paper is to explore a formative intervention project that was developed for the Municipal Secretariat of Education in São Paulo, Brazil for the broad development of all levels of educational management (teacher educators, coordinators, principals, teachers and students). Thus, the creative chain of activities is a key theoretical framework for promoting critical collaboration in order to cross the boundaries of educational management organization.Design/methodology/approachThe authors use data from the Management in Creative Chains Project (Liberali, 2012), as a way to enable the wide development of all levels of educational management. Data comprise formative meetings in which different educational managers system take part in two settings, the regional board with 25 schools and one of the participating schools. The analysis is based on thematic content and argumentative organization, and on critical situations and the potentials they entailed.FindingsThe study guides to the conclusions of the process of creative chain as a possibility to expand management in the educational system and its community.Research limitations/implicationsEvery time there is a change in the mayors, there are changes in the way of addressing school management in the city. However, after the project, considerations about the needs of the communities became part of the public policy regardless of who is in charge of the city and its educational system.Practical implicationsThis study can be used for transformation in the management and teaching and learning activities and improvement of the school-community relation.Social implicationsSocially this study can lead to improvement in the quality of life in the community and at school.Originality/valueDifferently from a top down educational management, which enables a reproductive chain, educational management in a creative chain, considering the community needs, enables subjects to become interdependent to expand and transform the activities in the educational system and hence the communities’ reality.
School leadership, teacher’s psychological empowerment and work-related outcomes
Authors: Kõiv Kersti , Liik Kadi , Heidmets Mati 
Published: October 2019

PurposeThe purpose of this paper is to examine the mediating effect of teacher’s psychological empowerment between school leadership style and teachers’ work-related outcomes.Design/methodology/approachA total of 711 teachers from 31 Estonian schools were surveyed with a questionnaire measuring four dimensions of psychological empowerment (competence, meaning, self-determination and impact), school leadership characteristics (leadership style, leader’s empowering behavior and trust in leader) and teacher’s work-related outcomes (job satisfaction and workplace attachment). AMOS path analysis was used to investigate the direct and indirect relations between the teachers’ perceptions of school leadership, their psychological empowerment and their workplace attachment and job satisfaction.FindingsThis study found that psychological empowerment (subscales meaning and impact) mediates the relationship between perceived leadership empowerment behavior and teachers’ work-related outcomes. Also, the psychological empowerment (meaning and impact) mediates the relationship between perceived leadership style and teachers’ work-related outcomes. Trust in the principal has direct and indirect effect (through psychological empowerment) on job satisfaction, whereas there only seems to be indirect effect on workplace attachment through two components of psychological empowerment.Practical implicationsThe mediating role of psychological empowerment includes an important message for school principals – in order to empower employees it is not sufficient to merely delegate formal power and decision-making rights. To facilitate the development of psychological empowerment, it is important to provide employees with an opportunity to experience agency, to experience that their voice and opinions are taken into account (perceived impact) and the purpose and targets of the whole organization are discussed with the employees and formulated in collaboration with them (perceived meaning).Originality/valuePsychological empowerment as a mediating variable has not been widely researched, especially in school environment. The results will provide important signals for school principals, where and how to find leverage to improve teachers’ job satisfaction and workplace attachment.
Performance of Islamic banks
Authors: Musleh Alsartawi Abdalmuttaleb 
Published: October 2019

PurposeThis paper aims to investigate the relationship between the composition of Sharīʿah supervisory boards (independence and frequency of meetings) and the performance of Islamic banks in the Gulf Cooperation Council (GCC) countries.Design/methodology/approachThe study developed a multiple linear regression model, and data were collected from the annual reports of 48 standalone Islamic banks listed in the GCC countries covering the period between 2013 and 2017.FindingsThe results showed a statistically significant and negative relationship between the composition of the Sharīʿah supervisory boards and the performance of Islamic banks.Research limitations/implicationsAs the current study used only one indicator, that is Return on Assets to measure performance, it is recommended to expand the framework of this study, through the addition of market-based performance indicators such as Tobin’s Q.Practical implicationsThis study recommends the GCC countries to follow a more proactive Sharīʿah governance model to strengthen their frameworks from both regulatory and non-regulatory aspects.Originality/valueThe study contributes to the Sharīʿah governance and Islamic banking literature relating to the GCC countries as previous studies gave no attention to the composition of Sharīʿah supervisory boards.