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Article
Publication date: 27 September 2021

Feng Dong, Xiao Wang and Jiawen Chen

This study aims to investigate the impact of family ownership on cooperative research and development (R&D). Drawing on the ability and willingness paradox framework in…

Abstract

Purpose

This study aims to investigate the impact of family ownership on cooperative research and development (R&D). Drawing on the ability and willingness paradox framework in family business research, the authors suggest that family ownership influences cooperative R&D via two opposing mechanisms: power concentration and wealth concentration. It also deepens the current understanding of the boundary conditions of informal institutions for the impact of family ownership on cooperative R&D by investigating the moderating role of political ties.

Design/methodology/approach

The authors analyze a panel of 610 Chinese manufacturing family firms and 2,127 firm-year observations from 2009 to 2017. Fixed effects regression analysis is used to test the hypotheses, with the two-stage Heckman model to address sample selection bias.

Findings

The research findings indicate that family ownership has an inverted U-shaped relationship with cooperative R&D and political ties moderate the relationship in such a way that the inverted U-shaped relationship will be steeper in firms with more political ties than in firms with fewer political ties.

Practical implications

Family ownership influences firms’ cooperative R&D through the positive effect of power concentration and the negative effect of wealth concentration. Family owners should, therefore, take advantage of concentrated power, for instance, by adapting quickly and committing sufficient resources to cooperative R&D opportunities, while controlling path-dependent relationship development caused by concentrated family wealth. The effect of political ties on the relationship between family ownership and cooperative R&D is found to be a double-edged sword.

Originality/value

This study extends the ability and willingness paradox framework and provides novel insights into cooperative R&D in family businesses by integrating power concentration and wealth concentration associated with family ownership. Moreover, this study provides a contingency perspective and introduces the moderating role of political ties in shaping cooperative R&D in family firms.

Details

Journal of Knowledge Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1367-3270

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Article
Publication date: 11 May 2020

Feng Dong, Hao Chen, Shuai Xu and Sihang Cui

This paper aims to present a novel position sensorless control scheme with fault-tolerance ability for switched reluctance motor at low speed.

Abstract

Purpose

This paper aims to present a novel position sensorless control scheme with fault-tolerance ability for switched reluctance motor at low speed.

Design/methodology/approach

First, the detection pulses are injected in the freewheeling and idle intervals of each phase. Second, the aligned position of each phase can be detected by comparing the consecutive rise time of detection current. Third, the whole-region rotor position and real-time rotational speed can be updated four times for the improvement of detection accuracy. Finally, the fault-tolerant control strategy is performed to enhance the robustness and reliability of proposed sensorless scheme under faulty conditions.

Findings

Based on proposed sensorless control strategy, the estimated rotor position is in good agreement with the actual rotor position and the maximum rotor position error is 1.5°. Meanwhile, the proposed sensorless scheme is still effective when the motor with multiphase loss and the maximum rotor position error is 1.9°. Moreover, the accuracy of the rotor position estimation can be ensured even if the motor is in an accelerated state or decelerated state.

Originality/value

The proposed sensorless method does not require extensive memory, complicated computation and prior knowledge of the electromagnetic properties of the motor, which is easy to implement. Furthermore, it is suitable for different control strategies at low speed without negative torque generation.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 39 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 24 July 2020

Run-Hua Song, Hai-Long Qin, Zhong-Nan Bi, Ji Zhang, Hai Chi, Esteban P Busso and Dong-Feng Li

The purpose of this paper is to systematically investigate the dynamic strain aging (DSA) effect in solid solution treated IN718 at different temperatures through…

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169

Abstract

Purpose

The purpose of this paper is to systematically investigate the dynamic strain aging (DSA) effect in solid solution treated IN718 at different temperatures through experiments and simulations to gain an understanding of the inelastic deformation mechanisms.

Design/methodology/approach

In the present work, uniaxial tensile tests have been carried out in conjunction with finite element (FE) simulations to investigate the behaviour of the solid solution treated Inconel 718 superalloy at different temperatures and strain rates. Dynamic strain aging (DSA) effects, which manifested during the tests in the form of a negative strain rate sensitivity and stress serrations, are investigated. The most significant DSA effect occurs at 500°C and at a strain rate of 10–4 s-1. In a newly proposed rate-dependent constitutive formulation, the DSA model, proposed by McCormick, Kubin and Estrin, was introduced into slip-assisted solute hardening, and an activation energy-dependent exponential flow rule was adopted.

Findings

The observed negative strain rate sensitivity and stress serrations are well predicted by a 3 D FE. The FE results indicate that the equivalent plastic strain rate distribution in the specimen gauge length is as highly inhomogeneous as in the other materials exhibiting DSA effects such as aluminium and titanium alloy. During inelastic deformation, propagating high strain rate bands can be closely correlated to the stress serrations.

Originality/value

For the DSA effect in solid solution treated IN718, the existing researching mainly focuses on the mechanical properties experiment and microstructure observation. In this study, a constitutive formulation, combined with the DSA model, has been proposed, and the mechanical behaviors, including the DSA effect, have been well predicted by a finite element model.

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Article
Publication date: 10 July 2017

Jiancheng Shen, Mohammad Najand, Feng Dong and Wu He

Emotion plays a significant role in both institutional and individual investors’ decision-making process. Emotions affect the perception of risk and the assessment of…

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1468

Abstract

Purpose

Emotion plays a significant role in both institutional and individual investors’ decision-making process. Emotions affect the perception of risk and the assessment of monetary value. However, there is a lack of empirical evidence available that addresses how investors’ emotions affect commodity market returns. The purpose of this paper is to investigate whether media-based emotions can be used to predict future commodity returns.

Design/methodology/approach

The authors examine the short-term predictive power of media-based emotion indices on the following five days’ commodity returns. The research adopts a proprietary data set of commodity-specific market emotions, which is computed based on a comprehensive textual analysis of sources from newswires, internet news sources and social media. Time series econometrics models (threshold generalized autoregressive conditional heteroskedasticity and vector autoregressive) are employed to analyze 14 years (January 1998-December 2011) of daily observations of the CRB commodity market index, crude oil and gold returns, and the market-level sentiments and emotions (optimism, fear and joy).

Findings

The empirical results suggest that the commodity-specific emotions (optimism, fear and joy) have significant influence on individual commodity returns, but not on commodity market index returns. Additionally, the research findings support the short-term predictability of the commodity-specific emotions on the following five days’ individual commodity returns. Compared to the previous studies of news sentiment on commodity returns (Borovkova, 2011; Borovkova and Mahakena, 2015; Smales, 2014), this research provides further evidence of the effects of news and social media-based emotions (optimism, fear and joy) in the commodity market. Additionally, this work proposes that market emotion incorporates both a sentimental effect and appraisal effect on commodity returns. Empirical results are shown to support both the sentimental effect and appraisal effect when market sentiment is controlled in crude oil and gold spot markets.

Originality/value

This paper adopts the valence-arousal approach and cognitive appraisal approach to explain financial anomalies caused by investors’ emotions. Additionally, this is the first paper to explore the predictive power of investors’ emotions (optimism, fear and joy) on commodity returns.

Details

Review of Behavioral Finance, vol. 9 no. 2
Type: Research Article
ISSN: 1940-5979

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Article
Publication date: 1 April 1998

Winifred Aldrich, Brian Smith and Feng Dong

This paper describes research undertaken at the Nottingham Trent University which investigated body movements and their relationship to garment design. The study…

Abstract

This paper describes research undertaken at the Nottingham Trent University which investigated body movements and their relationship to garment design. The study identifies the difference between ergonomic measuring positions and the natural postures used by real figures in real activities. A new approach to the identification and coding of upper body postures has been made. A body coding system and a simple piece of equipment was designed that enables extended natural body positions to be recorded, thus achieving repeatability. This work enabled comparisons of aesthetic appearance and the functional comfort of women's tailored jackets to be examined.

Details

Journal of Fashion Marketing and Management: An International Journal, vol. 2 no. 4
Type: Research Article
ISSN: 1361-2026

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Article
Publication date: 5 August 2014

Shaobing Tang, Jiafang Lu and Philip Hallinger

Like other nations in Asia, mainland China has undergone continuous reforms in its economic, political and social institutions over the past two decades. These changes are…

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1002

Abstract

Purpose

Like other nations in Asia, mainland China has undergone continuous reforms in its economic, political and social institutions over the past two decades. These changes are also reflected in its education system, which has been both the target of government reforms and an agent for social change. In this context, China's Ministry of Education has cast school principals as key actors in leading and managing change in schools at the local level throughout the country. The purpose of this paper is to explore how Chinese school leaders successfully respond to the implementation of educational reform.

Design/methodology/approach

In this paper the authors explore how school leaders in one city in South China perceive their roles and actions in fostering successful change. The study employed extensive literature review with qualitative interviews of five school principals who had demonstrated success at leading change in their schools.

Findings

The findings of both the literature review and interview study unexpectedly found more similarities than differences between how leaders contribute to successful change in China as compared with the Western literature.

Research limitations/implications

The research findings are limited by two main features. First, the sources analyzed in the literature review were of highly varying quality. Moreover, relatively few employed replicable analytical methods capable of generalization. These limitations of the literature mean that the results of the review can only be interpreted as suggestive rather than conclusive. Second, the interview study was framed as an effort to further explore the trends of the literature review. Although the findings from the small-scale interview study were consistent with the broader Chinese literature, the research design suffers form the same limitations as the general literature. Therefore, these findings must also be treated as emergent rather than explanatory.

Practical implications

The paper identifies directions for future research and discusses implications for school leaders in implementing educational change in China.

Originality/value

The originality of this study lies in its attempt to synthesize a previously inaccessible literature on change leadership in Chinese schools. Despite China's rising role as a global leader, the literature in educational leadership and management remains sparse and largely unknown to Western scholars. Therefore, the study's limitations are balanced by the need to provide better descriptions of current practices employed by leaders as they attempt to improve China's schools.

Details

International Journal of Educational Management, vol. 28 no. 6
Type: Research Article
ISSN: 0951-354X

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Article
Publication date: 1 March 1996

Shaw‐Jyh Shin, I‐Shou Tsai and Po‐Dong Lee

Reports how the theorem of the texture “tuned” mask was modified to solve some problems encountered in the automatic faults (including filling bars, oil stains…

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152

Abstract

Reports how the theorem of the texture “tuned” mask was modified to solve some problems encountered in the automatic faults (including filling bars, oil stains, weft‐lacking and holes) detection and recognition of the plain woven fabrics. These problems are the faults of variable shapes and sizes, those of variable structure and the grey‐level differences in the faults of oil stains. The index of the “tuned” mask in the texture “tuned” mask theorem was modified to converge the variability of the faults, and to elongate the distances between each fault’s average texture energy so that the texture energy in normal texture and in faults can be confined to different fixed ranges. The results show that the optimum texture “tuned” mask found from the modified theorem of the texture “tuned” mask can be used satisfactorily to identify different faults due to structure, shapes and size variation. However, in the case of undertoned oil stains and lower density filling bars, this method may sometimes cause misidentification.

Details

International Journal of Clothing Science and Technology, vol. 8 no. 1/2
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 28 June 2018

Haibo Feng, Yanwu Zhai and Yili Fu

Surgical robot systems have been used in single-port laparoscopy (SPL) surgery to improve patient outcomes. This study aims to develop a vision robot system for SPL…

Abstract

Purpose

Surgical robot systems have been used in single-port laparoscopy (SPL) surgery to improve patient outcomes. This study aims to develop a vision robot system for SPL surgery to effectively improve the visualization of surgical robot systems for relatively complex surgical procedures.

Design/methodology/approach

In this paper, a new master-slave magnetic anchoring vision robotic system for SPL surgery was proposed. A lighting distribution analysis for the imaging unit of the vision robot was carried out to guarantee illumination uniformity in the workspace during SPL surgery. Moreover, cleaning force for the lens of the camera was measured to assess safety for an abdominal wall, and performance assessment of the system was performed.

Findings

Extensive experimental results for illumination, control, cleaning force and functionality test have indicated that the proposed system has an excellent performance in providing the visual feedback.

Originality/value

The main contribution of this paper lies in the development of a magnetic anchoring vision robot system that successfully improves the ability of cleaning the lens and avoiding the blind area in a field of view.

Details

Industrial Robot: An International Journal, vol. 45 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

Content available
Article
Publication date: 17 August 2012

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401

Abstract

Details

Grey Systems: Theory and Application, vol. 2 no. 2
Type: Research Article
ISSN: 2043-9377

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Book part
Publication date: 1 October 2014

Roseline Nyakerario Misati, Alfred Shem Ouma and Kethi Ngoka-Kisinguh

All over the world, the role of central banks is being redefined following the outbreak of the global financial crisis and subsequent breakdown of the “great moderation”…

Abstract

All over the world, the role of central banks is being redefined following the outbreak of the global financial crisis and subsequent breakdown of the “great moderation” consensus. Consequently, most advanced economies adopted non-conventional approaches of monetary policy which resulted in spill-overs to emerging markets and developing countries with implications on their financial system and monetary policy transmission. This, coupled with, internal developments in the financial systems of developing countries necessitated modifications of not only monetary policy frameworks but also responsibilities of most central banks. This chapter acknowledges possible evolutions of the financial structure variables in developing countries and uses data from Kenya to analyze the dynamic linkages between financial sector variables and monetary policy transmission in the light of the financial crisis. The study used structural vector autoregression to examine the relationship between financial structure variables and monetary policy as well as assess the relative importance of various monetary transmission channels in Kenya. The results show that the changing financial structure represented by credit to the private sector and stock market indicators in Kenya only slightly altered relative importance of monetary policy transmission. The insignificance of credit to the private sector suggests that the importance attached to the bank lending channel in previous studies is waning while the marginal significance of the stock market indicator signals the potential for asset price channel. The results also indicate that the interest rate and exchange rate channels are relatively more important in Kenya while the asset prices is only marginally significant and bank lending channel is the weakest in the intermediate stage of monetary policy transmission. However, transmission of monetary policy to the ultimate objectives is somewhat slow and weak to inflation and almost absent to output. The result implies a limited role of monetary policy on growth and questions the wisdom of pursuing multiple objectives.

Details

Risk Management Post Financial Crisis: A Period of Monetary Easing
Type: Book
ISBN: 978-1-78441-027-8

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