Shengxian Huang, Huihe Qiu and Ying Wang
Since most of the existing literature do not disclose the node coordinate data of its fixed-wing aircraft airfoil, in order to develop and obtain a practical and suitable…
Abstract
Purpose
Since most of the existing literature do not disclose the node coordinate data of its fixed-wing aircraft airfoil, in order to develop and obtain a practical and suitable deformation airfoil for fixed-wing micro air vehicle (MAV), this paper proposes an improved airfoil design method of fixed-wing MAV based on the profile data of S5010 airfoil.
Design/methodology/approach
Combined with the body shape variation of the stingray in the propulsion process, the parametric study of the aerodynamic shape of the original design airfoil is carried out to explore the influence of a single parameter change on the aerodynamic performance of the airfoil. Then, according to the influence law of single parameter variation on the aerodynamic performance of the airfoil, the original airfoil is synthetically deformed by changing multiple parameters.
Findings
By comparing the aerodynamic performance of the multi-parameter deformed airfoil with the original airfoil, it is found that the lift coefficient of the multi-parameter deformed airfoil changes from negative to positive value when AOA = 0°. When AOA = 2°, the lift coefficient growth rate is the largest, which is 47.27%, and the lift-to-drag ratio is increased by 50.00%. At other angles of attack, the lift, drag, and torque coefficients of the multi-parameter deformed airfoil are optimized to some extent.
Originality/value
Combined the body shape variation of the stingray in the propulsion process, the parametric study of the aerodynamic shape of the original design airfoil is carried out to explore the influence of a single parameter change on the aerodynamic performance of the airfoil.
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Shengxian Yu, Shanshi Liu and Chao Xu
The purpose of this paper is to investigate the effect of job insecurity on employee silence by developing a moderated mediation model. The model focuses on the mediating role of…
Abstract
Purpose
The purpose of this paper is to investigate the effect of job insecurity on employee silence by developing a moderated mediation model. The model focuses on the mediating role of ego depletion underpinning the relationship between job insecurity on employee silence and the moderating role of perceived coworker support and career growth opportunity in influencing the mediation.
Design/methodology/approach
This study conducts a questionnaire from 309 employees of six Chinese financial enterprises in two waves, with a one-month interval between the two waves. Moreover, this study uses bootstrapping and confirmatory factor analysis to verify the hypothesis.
Findings
Job insecurity has a significant positive impact on employee silence, and ego depletion partly mediated the relationship between job insecurity and employee silence. Perceived coworker support and career growth opportunity negatively moderated the relationship between job insecurity and ego depletion and also moderated the indirect effect of job insecurity on employee silence through ego depletion.
Practical implications
The study provides evidence for the positive effects of job insecurity on ego depletion, which, in turn, is significantly associated with employee silence. It highlights the important role of perceived coworker support and career growth opportunities in reducing employee negative perceptions and behaviors.
Originality/value
This empirical study provides preliminary evidence of the mediating role of ego depletion in the positive relationship between job insecurity and employee silence. The moderated mediation model also extends the existing finding by adding substantive moderators (perceived coworker support and career growth opportunity) to explain how the effect of job insecurity on employees’ behaviors unfolds.
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Institutional actors are critical allies for grassroots movements, but few studies have examined their effects and variations within the non-democratic context. This chapter…
Abstract
Institutional actors are critical allies for grassroots movements, but few studies have examined their effects and variations within the non-democratic context. This chapter argues that while institutional allies are heavily constrained and unlikely to give open endorsement to grassroot activists, some institutional activists indirectly facilitate movement mobilization and favorable outcomes in the process of advancing their own political agendas. Drawing upon in-depth interviews conducted in 2008 and 2012, I illustrate this argument by examining the Anti-PX Movement – a landmark grassroots environmental movement against a chemical plant – in Xiamen, China. I find that the environmental institutional actors were constrained and divided, yet some still fostered opportunities for movement mobilization and in turn exploited the opportunity created by the protesters to pursue their policy interests, thus facilitating positive movement outcomes. As long as the claims are not politically subversive to the authoritarian rule, this type of tacit and tactical interaction between institutional activists within the state and grassroot activists on the street is conducive to promoting progressive policy changes.
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Wenzhu Lu, Bo Sun, Shengxian Yu and Shanshi Liu
This research examined how customer mistreatment activates individual customer-directed counterproductive work behavior (CWBC) by investigating the mediating roles of negative…
Abstract
Purpose
This research examined how customer mistreatment activates individual customer-directed counterproductive work behavior (CWBC) by investigating the mediating roles of negative work reflection and negative affect. It also explored whether job autonomy buffers the negative impact of customer mistreatment on CWBC.
Design/methodology/approach
The authors tested their predictions using an experience-sample method with a sample of data from 79 service workers across eight days. A multilevel structural equation model was used to test the hypotheses.
Findings
The authors found that negative work reflection and negative affect mediated the association between customer mistreatment and CWBC. In addition, job autonomy moderated the indirect impact of daily customer mistreatment on employees' CWBC through negative work reflection and negative affect.
Research limitations/implications
There are some concerns about a common method because all of the study variables were self-reported. Moreover, the study sample consisted of participants recruited exclusively from China, thus limiting this research's generality.
Practical implications
To eliminate the detrimental impact of customer mistreatment, supervisors can strive to improve the autonomy of those who interact with customers frequently to reduce their CWBC.
Originality/value
This study offers an integrative view to explain why service workers engage in CWBC when suffering customer mistreatment by testing the mediating mechanisms of negative reflection and negative affect in the association between daily customer mistreatment and CWBC. Second, the authors have broadened the study of customer mistreatment by introducing job autonomy as a critical condition, eliminating the indirect association between customer mistreatment and CWBC.
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The purpose of this paper is to argue that, despite the attention given to China's rising importance in the international marketplace, there has not been a corresponding attention…
Abstract
Purpose
The purpose of this paper is to argue that, despite the attention given to China's rising importance in the international marketplace, there has not been a corresponding attention given to the sustainability dimensions i.e. social and environmental dimensions of this economic development trajectory. Specifically, what type of business strategy can and will best serve the economic, environmental and social needs of China, and what role if any can the private sector play facilitating the development of such a strategy?
Design/methodology/approach
The paper first examines the evolving relationship between business and sustainable development. Second, the sustainability challenge within the regional context in the Asia‐Pacific region is outlined. Third, the sustainability challenges posed by China's rise in the global economy are analyzed and the impacts of these challenges on current and future business strategies examined. Findings.– In order to fully understand the strategic convergence between China, business and sustainability concerns, it is important to understand the evolving relationship between business and sustainable development as well as the sustainability challenge within the regional context in the Asia‐Pacific region, and assess the impacts of these issues on current and future business strategies in China.
Research limitations/implications
The next step for research will be to explore if the new sustainable business models can be designed and implemented which are suitable to the market reality of China's economy.
Originality/value
The value of this paper is to seek new ideas for business strategy and new venture creation that incorporates a triple bottom line (economic, environment and social) perspective.
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Sanjita Jaipuria and Siba Sankar Mahapatra
The purpose of this paper is to propose a forecasting model to predict the demand under uncertain environment to control the bullwhip effect (BWE) considering review-period…
Abstract
Purpose
The purpose of this paper is to propose a forecasting model to predict the demand under uncertain environment to control the bullwhip effect (BWE) considering review-period order-up-to level ((R, S)) inventory control policy and its different variants such as (R, βS) (R, γO) and (R, γO, βS) proposed by Jakšič and Rusjan, (2008) and Bandyopadhyay and Bhattacharya (2013).
Design/methodology/approach
A hybrid forecasting model has been developed by combining the feature of discrete wavelet transformation (DWT) and an intelligence technique, multi-gene genetic programming (MGGP), denoted as DWT-MGGP. Performance of DWT-MGGP model has been verified under (R, S) inventory control policy considering demand from three different manufacturing companies.
Findings
A comparison between DWT-MGGP model and autoregressive integrated moving average forecasting model has been done by estimating forecast error and BWE. Further, this study has been extended with analysing the behaviour of BWE considering different variants of (R, S) policy such as (R,βS) (R, γO) and (R,γO,βS) and found that BWE can be moderated by controlling the inventory smoothing (β) and order smoothing parameters (γ).
Research limitations/implications
This study is limited to different variants of (R, S) inventory control policy. However, this study can be further extended to continuous review policy.
Practical implications
The proposed DWT-MGGP model can be used as a suitable demand forecasting model to control the BWE when (R, S), (R,βS) (R,γO) and (R,γO,βS)inventory control policies are followed for replenishment.
Originality/value
This study analyses the behavior of BWE through controlling the inventory smoothing (β) and order smoothing parameters (γ) when demand is predicted using DWT-MGGP forecasting model and order is estimated using (R, S), (R,βS) (R,γO) and (R,γO,βS) inventory control policies.