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Article
Publication date: 5 March 2018

Ling Zhou, Ling Bai, Wei Li, Weidong Shi and Chuan Wang

The purpose of this study is to validate the different turbulence models using in the numerical simulation of centrifugal pump diffuser. Computational fluid dynamics (CFD) has…

409

Abstract

Purpose

The purpose of this study is to validate the different turbulence models using in the numerical simulation of centrifugal pump diffuser. Computational fluid dynamics (CFD) has become the main method to study the pump inner flow patterns. It is important to understand the differences and features of the different turbulence models used in turbomachinery.

Design/methodology/approach

The velocity flow fields in a compact return diffuser under different flow conditions are studied and compared between CFD and particle image velocimetry (PIV) measurements. Three turbulence models are used to solve the steady flow field using high-quality fine structured grids, including shear stress transport (SST) k-w model, detached-eddy simulation (DES) model and SST k-w model with low-Re corrections.

Findings

SST k-w model with low-Re correction gives better results compared to DES and SST k-w model, and gives a good predication about the vortex core position under strong part-loading conditions.

Originality/value

A special test rig is designed to carry out the 2D PIV measurements under high rotating speed of 2850 r/min, and the PIV results are used to validate the CFD results.

Details

Engineering Computations, vol. 35 no. 1
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 December 2005

Chou‐Kang Chiu, Chi‐Sheng Chien, Chieh‐Peng Lin and Ching Yun Hsiao

This study seeks to fill a gap by investigating the moderating effects of LOC on each model path across internals and externals.

8471

Abstract

Purpose

This study seeks to fill a gap by investigating the moderating effects of LOC on each model path across internals and externals.

Design/methodology/approach

The sample comprised 242 professional staff across a wide range of departments of a large organization in metropolitan Taipei, Taiwan. Following data collection, structural equation modeling is applied to conduct data analysis for confirmatory factor analysis.

Findings

Test results indicate that global job satisfaction influences turnover intentions and organizational commitment is more for internals than externals. Organizational commitment influences turnover intentions similarly for both internals and externals. Furthermore, the influence of perceived job stress on job satisfaction and organizational commitment is stronger for externals than internals. Finally, leadership support influences job satisfaction more for internals than externals.

Practical implications

Support for the proposed model provides encouragement for health care leaders interested in creating stable and low turnover environments that benefit both employees and organizations. Creating enhanced work environments that strengthen leadership support for employees acting on their own expert judgment and relieving job stress are essential for fostering job satisfaction and organizational commitment. Moreover, boosting job satisfaction and organizational commitment will ultimately lead to reduced turnover intentions.

Originality/value

This study suggests that employees differ in terms of their locus of control, and that the differences are manifested in perceptions of job stress and leadership support.

Details

Journal of Management Development, vol. 24 no. 10
Type: Research Article
ISSN: 0262-1711

Keywords

Available. Open Access. Open Access
Article
Publication date: 16 September 2024

Wei Xiong, Tingting Liu, Xu Zhao and Zihan Xiao

This paper explores the association between directors’ and officers’ liability insurance (D&O insurance) and management tone manipulation.

290

Abstract

Purpose

This paper explores the association between directors’ and officers’ liability insurance (D&O insurance) and management tone manipulation.

Design/methodology/approach

This study uses data from A-share listed non-financial companies from 2009 to 2021 as its sample for empirical tests. In addition, the study relies on text analysis and the construction of models to investigate the relationship between D&O insurance and management tone manipulation.

Findings

The authors find that the purchase of D&O insurance will lead to management tone manipulation in the “management discussion and analysis” part of companies’ annual reports, and operating risk and agent cost are the two paths for the effect. Further analysis shows that having a male CEO and employing high-quality auditors can weaken the positive impact of D&O insurance on tone manipulation.

Originality/value

This paper provides a new approach for studying the literature related to D&O insurance and management behavior, and the findings enrich our understanding of the influencing factors and the mechanism of management tone manipulation, thus revealing policy implications for further standardization of the terms and system of D&O insurance in China.

Details

China Accounting and Finance Review, vol. 26 no. 5
Type: Research Article
ISSN: 1029-807X

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Article
Publication date: 12 September 2016

Baoguo Xie, Xun Xin and Guanglin Bai

Applying the theory of work adjustment (TWA), the purpose of this paper is to investigate whether the effect of hierarchical plateau on the turnover intention of employees at the…

1571

Abstract

Purpose

Applying the theory of work adjustment (TWA), the purpose of this paper is to investigate whether the effect of hierarchical plateau on the turnover intention of employees at the career establishment stage is mediated by job satisfaction and moderated by person-job fit.

Design/methodology/approach

A survey method was used and data were collected from 248 Chinese employees at the career establishment stage. Hierarchical regression analysis and moderated mediation analysis were used to test the hypotheses.

Findings

The results demonstrated that hierarchical plateau was positively related to the turnover intention of employees at the career establishment stage and that job satisfaction played a mediating role in the relationship. Person-job fit moderated the relationship between hierarchical plateau and job satisfaction, and the indirect effect of hierarchical plateau on turnover intention via job satisfaction.

Originality/value

This research offers new insights into the links between hierarchical plateau and employees’ work attitudes and withdrawal behaviour within the TWA. The results suggest that managers can lessen the negative effects of hierarchical plateau on employees’ attitudes and withdrawal behaviour by improving employees’ overall person-job fit.

Details

Career Development International, vol. 21 no. 5
Type: Research Article
ISSN: 1362-0436

Keywords

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Article
Publication date: 6 August 2024

Chao Li, Mengjun Huo and Renhuai Liu

The purpose of this paper is to empirically analyze the impact of directors’ and officers’ (D&O) liability insurance on enterprise strategic change. It also explores the mediating…

49

Abstract

Purpose

The purpose of this paper is to empirically analyze the impact of directors’ and officers’ (D&O) liability insurance on enterprise strategic change. It also explores the mediating role of litigation risk, the moderating roles of enterprise science and technology level and precipitation organizational slack between them. In addition, it examines the joint moderating roles of the top management team (TMT) external social network and enterprise science and technology level, and enterprise scale and precipitation organizational slack.

Design/methodology/approach

Using the unbalanced panel data of A-share listed companies in the Shanghai and Shenzhen stock exchanges of China from 2002 to 2020 as the research sample, this paper uses the ordinary least square method and fixed-effect model to study the relationship between D&O liability insurance and enterprise strategic change. The study also focuses on the mediating mechanism and moderating mechanisms between them.

Findings

The authors find that D&O liability insurance has an “incentive effect,” which can significantly promote enterprise strategic change. Litigation risk plays a partial mediating role between D&O liability insurance and enterprise strategic change. Enterprise science and technology level and precipitation organizational slack negatively moderate the relationship between D&O liability insurance and enterprise strategic change. TMT external social network and enterprise science and technology level, and enterprise-scale and precipitation organizational slack have joint moderating effects on the relationship between D&O liability insurance and enterprise strategic change.

Originality/value

This paper confirms the “incentive effect hypothesis” of the impact of D&O liability insurance on enterprise strategic change, which not only broadens the research perspective of enterprise strategic management but also further expands the research scope of D&O liability insurance. Besides, this paper thoroughly explores the influencing mechanisms between D&O liability insurance and enterprise strategic change, providing incremental contributions to the research literature in the field of enterprise risk management and corporate governance. The findings have practical guiding significance for expanding the coverage of D&O liability insurance, promoting the implementation of strategic changes and improving the level of corporate governance of Chinese enterprises.

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Article
Publication date: 26 April 2024

Bo Zhang, Yuqian Zheng, Zhiyuan Cui, Dongdong Song, Faqian Liu and Weihua Li

The impact of rolling on the performance of micro arc oxidation (MAO) coatings on ZM5 alloy has been underreported. The purpose of this study is to explore the correlation between…

47

Abstract

Purpose

The impact of rolling on the performance of micro arc oxidation (MAO) coatings on ZM5 alloy has been underreported. The purpose of this study is to explore the correlation between rolling and the failure mechanism of MAO coatings in greater depth.

Design/methodology/approach

The influence of rolling on the corrosion and wear properties of MAO coating was investigated by phase structure, bond strength test (initial bond strength and wet adhesion), electrochemical impedance spectroscopy and wear test. The change of the surface electrochemical properties was studied by first principles analysis.

Findings

The results showed that the MAO coating on rolled alloy had better corrosion and wear resistance compared to cast alloy, although the structure and component content of two kinds of MAO coating are nearly identical. The difference in interface bonding between MAO coating and Mg substrate is the primary factor contributing to the disparity in performance between the two types of samples. Finally, the impact of the rolling process on MAO coating properties is explained through first-principle calculation.

Originality/value

A comprehensive explanation of the impact of the rolling process on MAO coating properties will provide substantial support for enhancing the application of Mg alloy anticorrosion.

Graphical abstract

Details

Anti-Corrosion Methods and Materials, vol. 71 no. 4
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 3 July 2023

Hui-Ling Wendy Pan, Jui-Hsuan Hung and Huilin Bai

Learning power is crucial in today's rapidly changing world, yet its application to teachers is under-explored. This study delved into the investigation of teacher learning power…

251

Abstract

Purpose

Learning power is crucial in today's rapidly changing world, yet its application to teachers is under-explored. This study delved into the investigation of teacher learning power and examined how it matters in the relationship between teachers' experiences in lesson study and the adoption of constructivist pedagogy.

Design/methodology/approach

A cross-sectional survey of 226 elementary, junior high, and senior high school teachers in Taiwan was conducted, and the results were analyzed using structural equation modeling.

Findings

The findings suggest that both participation in lesson study and teacher learning power were positively associated with the practice of constructivist pedagogy. Moreover, teacher learning power partially mediated the relationship between lesson study and constructivist pedagogy.

Originality/value

By incorporating the concept of teacher learning power and performing a mediation analysis to understand how it matters, this study has added to the expanding collection of works on lesson study explored from different perspectives and in various contexts.

Details

International Journal for Lesson & Learning Studies, vol. 12 no. 3
Type: Research Article
ISSN: 2046-8253

Keywords

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Article
Publication date: 28 June 2013

Sheau‐yueh J. Chao

The purpose of this paper is to provide the historical background of genealogical records and analyze the value of Chinese genealogical research through the study of names and…

325

Abstract

Purpose

The purpose of this paper is to provide the historical background of genealogical records and analyze the value of Chinese genealogical research through the study of names and genealogical resources.

Design/methodology/approach

The paper examines the historical evolution and value of Chinese genealogical records, with the focus on researching the Islamic Chinese names used by the people living in Guilin. The highlight of this paper includes the analysis and evolution of the Islamic Chinese names commonly adopted by the local people in Guilin. It concludes with the recommendations on emphasizing and making the best use of genealogical records to enhance the research value of Chinese overseas studies.

Findings

The paper covers the history of Islam and describes how the religion was introduced into China, as well as Muslims' ethnicity and identity. It also places focus on the importance of building a research collection in Asian history and Chinese genealogy.

Research limitations/implications

This research study has a strong subject focus on Chinese genealogy, Asian history, and Islamic Chinese surnames. It is a narrow field that few researchers have delved into.

Practical implications

The results of this study will assist students, researchers, and the general public in tracing the origin of their surnames and developing their interest in the social and historical value of Chinese local history and genealogies.

Social implications

The study of Chinese surnames is, by itself, a particular field for researching the social and political implications of contemporary Chinese society during the time the family members lived.

Originality/value

Very little research has been done in the area of Chinese local history and genealogy. The paper would be of value to researchers such as historians, sociologists, ethnologists and archaeologists, as well as students and anyone interested in researching a surname origin, its history and evolution.

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Article
Publication date: 5 May 2020

Jiahong He

With the analysis of the causes of corruption, this study aims to investigate specific anti-corruption measures that can be implemented to reform the political system and the…

738

Abstract

Purpose

With the analysis of the causes of corruption, this study aims to investigate specific anti-corruption measures that can be implemented to reform the political system and the social climate of China.

Design/methodology/approach

This study examines 97 severe corruption cases of high-ranking officials in China, which occurred between 2012 and 2015. As this insinuates that both institutional and social corruption are major problems in China, the analysis delves into multiple facts of corruption, including different types, four primary underlying causes, and suggestions regarding the implementation of three significant governmental shifts that focus on investigation, prevention tactics and legal regulations.

Findings

China’s corruption is not only individual-based but also it has developed into institutional corruption and social corruption. Besides human nature and instinct, the causes of corruption can be organised into four categories, namely, social customs, social transitions, institutional designs and institutional operations. For the removed high-ranking officials, the formation of interest chains was an important underlying cause behind their corruption.

Originality/value

This study makes a significant contribution to the literature because this study provides a well-rounded approach to a complex issue by highlighting the significance of democracy and the rule of law as ways to regulate human behaviour to combat future corruption.

Details

Journal of Financial Crime, vol. 27 no. 3
Type: Research Article
ISSN: 1359-0790

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Article
Publication date: 9 June 2021

Alhusain Taher, Faridaddin Vahdatikhaki and Amin Hammad

This study proposes a framework for Earthwork Ontology (EW-Onto) to support and enhance data exchange in the project and the efficient decision-making in the planning and…

348

Abstract

Purpose

This study proposes a framework for Earthwork Ontology (EW-Onto) to support and enhance data exchange in the project and the efficient decision-making in the planning and execution phases.

Design/methodology/approach

The development of EW-Onto started from defining the concepts and building taxonomies for earthwork operations and equipment following the METHONTOLOGY approach. In addition, several rules have been extracted from safety codes and implemented as SWRL rules. The ontology has been implemented using Protégé. The consistency of EW-Onto has been checked and it has been evaluated using a survey.

Findings

The assessment of EW-Onto by experts indicates an adequate level of consensus with the framework, as an initial step for explicit knowledge exchanges within the earthwork domain.

Practical implications

The use of an ontology within the earthwork domain can help: (1) link and identify the relationships between concepts, define earthwork semantics, and classify knowledge in a hierarchical way accepted by experts and end-users; (2) facilitate the management of earthwork operations and simplify information exchange and interoperability between currently fragmented systems; and (3) increase the stakeholders' knowledge of earthwork operations through the provision of the information, which is structured in the context of robust knowledge.

Originality/value

This paper proposes a framework for Earthwork Ontology (EW-Onto) to support and enhance data exchange in the project and the efficient decision-making in the planning and execution phases. EW-Onto represents the semantic values of the entities and the relationships, which are identified and formalized based on the basic definitions available in the literature and outlined by experts.

Details

Engineering, Construction and Architectural Management, vol. 29 no. 6
Type: Research Article
ISSN: 0969-9988

Keywords

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