Search results

1 – 6 of 6
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 23 October 2023

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…

139

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.

Details

Engineering Computations, vol. 40 no. 9/10
Type: Research Article
ISSN: 0264-4401

Keywords

Access Restricted. View access options
Article
Publication date: 26 April 2022

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…

763

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.

Details

Chinese Management Studies, vol. 17 no. 3
Type: Research Article
ISSN: 1750-614X

Keywords

Access Restricted. View access options
Book part
Publication date: 16 October 2018

Yang Zhang

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.

Details

Research in Social Movements, Conflicts and Change
Type: Book
ISBN: 978-1-78756-895-2

Keywords

Access Restricted. View access options
Article
Publication date: 30 November 2022

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…

497

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.

Details

Career Development International, vol. 28 no. 1
Type: Research Article
ISSN: 1362-0436

Keywords

Access Restricted. View access options
Article
Publication date: 3 October 2008

Jacob Park

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…

3021

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.

Details

Management Research News, vol. 31 no. 12
Type: Research Article
ISSN: 0140-9174

Keywords

Access Restricted. View access options
Article
Publication date: 8 February 2019

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…

660

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.

Details

Journal of Modelling in Management, vol. 14 no. 2
Type: Research Article
ISSN: 1746-5664

Keywords

1 – 6 of 6
Per page
102050