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Article
Publication date: 13 August 2019

Hui Lü, Kun Yang, Wen-bin Shangguan, Hui Yin and DJ Yu

The purpose of this paper is to propose a unified optimization design method and apply it to handle the brake squeal instability involving various uncertainties in a unified…

134

Abstract

Purpose

The purpose of this paper is to propose a unified optimization design method and apply it to handle the brake squeal instability involving various uncertainties in a unified framework.

Design/methodology/approach

Fuzzy random variables are taken as equivalent variables of conventional uncertain variables, and a unified response analysis method is first derived based on level-cut technique, Taylor expansion and central difference scheme. Next, a unified reliability analysis method is developed by integrating the unified response analysis and fuzzy possibility theory. Finally, based on the unified reliability analysis method, a unified reliability-based optimization model is established, which is capable of optimizing uncertain responses in a unified way for different uncertainty cases.

Findings

The proposed method is extended to perform squeal instability analysis and optimization involving various uncertainties. Numerical examples under eight uncertainty cases are provided and the results demonstrate the effectiveness of the proposed method.

Originality/value

Most of the existing methods of uncertainty analysis and optimization are merely effective in tackling one uncertainty case. The proposed method is able to handle the uncertain problems involving various types of uncertainties in a unified way.

Details

Engineering Computations, vol. 37 no. 1
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 19 April 2024

Xiaotong Huang, Wentao Zhan, Chaowei Li, Tao Ma and Tao Hong

Green innovation in supply chains is crucial for socioeconomic development and stability. Factors that influence collaborative green innovation in the supply chain are complex and…

221

Abstract

Purpose

Green innovation in supply chains is crucial for socioeconomic development and stability. Factors that influence collaborative green innovation in the supply chain are complex and diverse. Exploring the main influencing factors and their mechanisms is essential for promoting collaborative green innovation in supply chains. Therefore, this study analyzes how upstream and downstream enterprises in the supply chain collaborate to develop green technological innovations, thereby providing a theoretical basis for improving the overall efficiency of the supply chain and advancing green innovation technology.

Design/methodology/approach

Based on evolutionary game theory, this study divides operational scenarios into pure market and government-regulated operations, thereby constructing collaborative green innovation relationships in different scenarios. Through evolutionary analysis of various entities in different operational scenarios, combined with numerical simulation analysis, we compared the evolutionary stability of collaborative green innovation behavior in supply chains with and without government regulation.

Findings

Under pure market mechanisms, the higher the green innovation capability, the stronger the willingness of various entities to collaborate in green innovation. However, under government regulation, a decrease in green innovation capability increases the willingness to collaborate with various entities. Environmental tax rates and green subsidy levels promote collaborative innovation in the short term but inhibit collaborative innovation in the long term, indicating that policy orientation has a short-term impact. Additionally, the greater the penalty for collaborative innovation breaches, the stronger the intention to engage in collaborative green innovation in the supply chain.

Originality/value

We introduce the factors influencing green innovation capability and social benefits in the study of the innovation behavior of upstream and downstream enterprises, expanding the research field of collaborative innovation in the supply chain. By comparing the collaborative innovation behavior of various entities in the supply chain under a pure market scenario and government regulations, this study provides a new perspective for analyzing the impact of corresponding government policies on the green innovation capability of upstream and downstream enterprises, enriching theoretical research on green innovation in the supply chain to some extent.

Details

Kybernetes, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 December 2006

Caroline Biron, Jean‐Pierre Brun, Hans Ivers and Cary Cooper

Many studies have shown that an unfavourable psychosocial environment increases the risk of mental and physical illness, as well as absenteeism, or sickness absence. However, more…

1495

Abstract

Many studies have shown that an unfavourable psychosocial environment increases the risk of mental and physical illness, as well as absenteeism, or sickness absence. However, more costly than absenteeism is presenteeism, where a person is present at work even though disabled by a mental or physical illness. We sought to identify factors explaining why workers would come to work even when their health is impaired. In a cross‐sectional design data were collected from 3825 employees of a Canadian organisation. The results show a high occurrence of presenteeism: workers went to work in spite of illness 50% of the time. Presenteeism propensity (the percentage of days worked while ill over total number of sick days) was higher for workers who were ill more often. Heavier workloads, higher skill discretion, harmonious relationships with colleagues, role conflict and precarious job status increased presenteeism, but decision authority did not. Workers reporting high psychological distress and more severe psychosomatic complaints were also more likely to report higher rates of presenteeism. These results suggest that stress research should not only include absenteeism as an outcome indicator, but also consider presenteeism.

Details

Journal of Public Mental Health, vol. 5 no. 4
Type: Research Article
ISSN: 1746-5729

Keywords

Available. Open Access. Open Access
Article
Publication date: 31 August 2012

Ming-Miin Yu, Bo Hsiao, Shih-Hsun Hsu and Shaw Yu Li

This paper presents an alternative approach to evaluating the overall efficiency and performance of Taiwanese container ports. Specifically, a parallel activity with series…

349

Abstract

This paper presents an alternative approach to evaluating the overall efficiency and performance of Taiwanese container ports. Specifically, a parallel activity with series structure concept in the form of data envelopment analysis (MNDEA) is used to construct a model that applies to three different activities: harbor management, stevedoring and warehousing operations. We will further divide each activity into two process types, production processes and services processes. We will also adopt a Delphi survey approach and use the Analytic Network Process (ANP) to identify these processes’influence dependence and their degree of importance for the MNDEA model setting. An empirical application demonstrates the performance of Taiwanese container ports by using MNDEA with window analysis techniques via the directional distance functionThe results demonstrate that the application is effective in indicating and/or suggesting resource-adjustments, while considering which undesirable output levels and shared inputs were involved. The results also present directions for possible improvements in workplace efficiency.

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Article
Publication date: 5 May 2022

Abuelhassan Elshazly Abuelhassan and Ali AlGassim

Based on social exchange theory (SET) and conservation of resources (COR) theory, this study aims to examine the unique combined impact of procedural justice (PJ) and distributive…

1344

Abstract

Purpose

Based on social exchange theory (SET) and conservation of resources (COR) theory, this study aims to examine the unique combined impact of procedural justice (PJ) and distributive justice (DJ) on proactive customer service performance (PCSP) and general self-efficacy (GSE) in the hospitality industry. It also estimates these variables’ joint effect on PCSP controlling GSE.

Design/methodology/approach

The study’s results were derived from a sample of 380 frontline supervisor–subordinate dyads, placed in 18 five-star hotels, through three-wave data collection. The hypotheses and construct validity were generated through structural equation modeling.

Findings

The combined impact of DJ and PJ on GSE and PCSP was significantly positive, and GSE mediated the relationships between DJ and PCSP as well as PJ and PCSP.

Practical implications

To improve service employees’ GSE and PCSP, hospitality management should guide and encourage managers to highlight and maintain organizational justice (OJ) in all their strategies and operations. DJ and PJ are advised to appreciate service employees’ GSE and extra-role behaviors (e.g. PCSP) through providing organizational resources.

Originality/value

This paper offers unique practical and theoretical contributions to the hospitality industry and associated literature by implementing SET and COR theory with OJ, GSE and PCSP constructs.

Details

International Journal of Contemporary Hospitality Management, vol. 34 no. 7
Type: Research Article
ISSN: 0959-6119

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Article
Publication date: 19 June 2009

Alessandro Arbore, Paolo Guenzi and Andrea Ordanini

Interpersonal relationships can be a key success factor in many service businesses. A capable disc jockey, for example, may help a radio station in improving customer…

2846

Abstract

Purpose

Interpersonal relationships can be a key success factor in many service businesses. A capable disc jockey, for example, may help a radio station in improving customer satisfaction. But does he/she help in building customer loyalty too? What happens if this employee leaves the organisation? The purpose of this paper is to assess the overall net effect that customer satisfaction with a key service employee may have on customer loyalty to a service firm.

Design/methodology/approach

The radio industry is selected as a specific case where a key service employee exists. A conceptual model is developed and tested on a sample of radio listeners using structural equation modelling.

Findings

The results confirm that customer satisfaction with a disc jockey increases personal loyalty to this employee. That outcome, in turn, cancels out part of the positive effects on customer loyalty to the radio station.

Research limitations/implications

The model is tested within a specific service industry and the findings are not generalisable to contexts whose underlying characteristics differ from that industry. The aim is to propose a frame for estimating the net effects of relational trade‐offs with a key service employee. More generally, the study contributes to increased knowledge on the topic of customers' multiple levels of relationships.

Practical implications

When designing a value proposition in service industries where a key employee exists, it becomes especially important to add value elements and satisfaction drivers strictly referable to the firm and not to a specific person (e.g. image and reputation, behavioural consistency, overall experience, etc.).

Originality/value

The concept of “key service employee” is formally introduced and defined. A crossed design to weigh both direct and indirect relational outcomes is proposed. Loyalty to a key employee is explicitly measured as concurrent loyalty toward the firm.

Details

Journal of Service Management, vol. 20 no. 3
Type: Research Article
ISSN: 1757-5818

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Book part
Publication date: 2 June 2008

Siu-kee Wong

When the factor endowments of two trading countries do not lie in the same diversification cone, trade in commodities may not reduce the international factor return differentials…

Abstract

When the factor endowments of two trading countries do not lie in the same diversification cone, trade in commodities may not reduce the international factor return differentials. This chapter specifies some conditions of the demand function in a two-factor, infinite-good model that guarantee partial factor price equalization. The wage-rental ratios of two trading countries are convergent if goods farther apart are poorer substitutes than goods closer together in the factor-intensity ranking. This generalizes the result in the literature, which is usually obtained under the assumption of Cobb–Douglas utility and production functions.

Details

Contemporary and Emerging Issues in Trade Theory and Policy
Type: Book
ISBN: 978-1-84950-541-3

Keywords

Available. Open Access. Open Access
Article
Publication date: 13 December 2022

Zeba Khanam and Sheema Tarab

Based on the theory of planned behavior (TPB) and stakeholder theory, the model proposes that responsible leadership (RL) is mediated by affective commitment (AC) on both outcome…

4161

Abstract

Purpose

Based on the theory of planned behavior (TPB) and stakeholder theory, the model proposes that responsible leadership (RL) is mediated by affective commitment (AC) on both outcome variables (organizational citizenship behavior [OCB] and patient satisfaction [PS]) while distributive justice (DJ) moderates the relationship among RL, OCB and PS through the mediator of AC.

Design/methodology/approach

Overall, data collected from 275 employees and patients in India’s healthcare sector support this model both in online and offline mode. SPSS 25, AMOS 22 and PROCESS macro were used to analyze the data.

Findings

The influence of RL, OCB and PS was seen insignificant in the Indian healthcare sector. This study examines the role of AC as a mediator which does not affect extra-role behavior and PS. The findings also show that the moderation-mediation effect of DJ through AC strengthened the link between RL and OCB, but not PS. Commitment does not affect extra-role behavior and PS.

Originality/value

Until now, there has been no research in the Indian context that has tested the effect of RL on extra-role behaviors and PS, as mediated by AC, according to researchers’ knowledge. Since RL and outcome variables are related through AC, the current study aims to understand how DJ acts as a moderator to that relationship.

Details

IIM Ranchi journal of management studies, vol. 2 no. 1
Type: Research Article
ISSN: 2754-0138

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Article
Publication date: 28 January 2025

Bo Tian, Jiaxin Fu, Yongshun Xu and Jinjin Li

As the complexity and uncertainty of infrastructural megaprojects challenge traditional management models, there is an increasing focus on value co-creation as an organizational…

18

Abstract

Purpose

As the complexity and uncertainty of infrastructural megaprojects challenge traditional management models, there is an increasing focus on value co-creation as an organizational strategy to streamline management. However, the role of value co-creation behavior in facilitating the value realization process remains underexplored. This study examines how justice perception (distributive, procedural and interactional justice) improves contractor value co-creation behavior, focusing on the mediating role of psychological ownership.

Design/methodology/approach

Ten hypotheses in the proposed research model were tested through partial least squares structural equation modeling using 199 valid questionnaires from China.

Findings

The results show that contractor value co-creation behavior is directly and positively influenced by procedural, distributive and interactional justice and indirectly influenced by them through the underlying psychological mechanism of psychological ownership.

Originality/value

The findings fill a knowledge gap by examining the effect of justice perception on contractor value co-creation behavior based on social exchange theory. Discovering justice perception will contribute to contractor value co-creation behavior, and psychological ownership mediates this relationship.

Details

Engineering, Construction and Architectural Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-9988

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Article
Publication date: 1 June 1999

J. Abouchabaka, R. Aboulaïch, A. Nachaoui and A. Souissi

Electrical potentials in a junction field transistor can be calculated using a simplified model based on a complete depletion assumption. This gives rise to a free boundary…

166

Abstract

Electrical potentials in a junction field transistor can be calculated using a simplified model based on a complete depletion assumption. This gives rise to a free boundary problem. We show here how we can approximate this problem with a quasi‐variational inequality technique and the shape optimization method. A detailed analysis of these methods is presented. Using some numerical experiments we compare our results with the solution of the discrete drift‐diffusion system, accomplished with a Gummel‐like algorithm. The numerical results suggest that the methods proposed here work successfully and that the shape optimization technique provides a reasonably free boundary without excessive iterations.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 18 no. 2
Type: Research Article
ISSN: 0332-1649

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