Yali Zhang, Xiaogang Zhang and Zhongmin Jin
This study aims to investigate the contact behavior of nominal curved surfaces with random roughness.
Abstract
Purpose
This study aims to investigate the contact behavior of nominal curved surfaces with random roughness.
Design/methodology/approach
A deterministic model was applied to investigate the contact behavior. Numerical calculations were conducted on Gaussian and fractal profiles under a range of loading conditions. The deformation behavior is characterized in terms of three regimes including the elastic, elastoplastic and plastic regimes.
Findings
A linear relationship was observed between the real contact areas and normal loads, which is mainly governed by the plastic deformation. Surface roughness changes contact behavior by influence the transition of deformation regimes. Rougher surfaces generally demonstrate higher saturated plastic ratios.
Originality/value
The contact behavior of nominally curved surfaces with random roughness is understood in terms of the evolution of real contact areas and plastic ratios.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2019-0190.
Details
Keywords
This study aims to investigate the sliding friction behaviour and mechanism of engineering surfaces.
Abstract
Purpose
This study aims to investigate the sliding friction behaviour and mechanism of engineering surfaces.
Design/methodology/approach
A new numerical approach is proposed. This approach derives the macroscale friction coefficient from microscale asperity interactions. By applying this approach, the sliding friction behaviour under different operating conditions were investigated in terms of molecular and mechanical components.
Findings
Numerical results demonstrate an independent relationship between normal load and friction coefficient, which is governed by the saturated plastic ratio. Numerical results also demonstrate that under very small load, an increase in load increases the friction coefficient. In addition, numerical results confirm the existence of optimal surface roughness where the friction coefficient is the lowest. For the surface profiles used in the current calculation, an optimal surface roughness value is obtained as Rq = 0.125 μm.
Originality/value
This new approach characterizes the deterministic relationship between macroscale friction coefficient and microscale asperity molecular/mechanical interactions. Numerical results facilitate the understanding of sliding friction mechanism.
Details
Keywords
Yali Zhang, Xiaogang Zhang, Tonghai Wu and You-bai Xie
The piston ring-cylinder liner pair is one of the most important tribological systems of an internal combustion engine. The friction loss of the piston ring-cylinder liner pair…
Abstract
Purpose
The piston ring-cylinder liner pair is one of the most important tribological systems of an internal combustion engine. The friction loss of the piston ring-cylinder liner pair accounts for the largest portion of total efficiency losses. Therefore, improving the tribological system design of the piston ring-cylinder liner pair can reduce friction losses and bring tremendous economic benefits to society. This paper aims use surface texturing, which is proving to be an effective method, for improving the tribological performance of sliding surfaces.
Design/methodology/approach
In this paper, an experimental study using a pin-on-disk tribometer was carried out to evaluate the effects of surface texturing on friction reduction of piston rings under various loads and sliding velocities. Rectangular- and circular-shaped textures with different depths and area densities were produced by a Femtosecond laser. Comparison experiments were conducted with un-textured rings.
Findings
The results indicate that the friction performance of the ring surface was significantly improved by surface texturing, and the running-in stage was also shortened. More specifically, it was found that the rectangular-shaped texture had a better effect on friction reduction than the circular-shaped texture. Results also indicate that an optimum texture density existed for the rectangular-shaped texture. Additionally, it was observed that the average friction coefficient reduction of the textured ring decreased with increasing load and increased with increasing sliding velocity.
Originality/value
Consequently, these findings provide a more in-depth understanding of the relationship between micro-textures and tribological properties of piston rings in lubricating sliding.
Details
Keywords
The purpose of this paper is to examine the cause‐effect chain between public services motivation (PSM) and consequences variables, which include organizational citizenship…
Abstract
Purpose
The purpose of this paper is to examine the cause‐effect chain between public services motivation (PSM) and consequences variables, which include organizational citizenship behaviour (OCB) and job satisfaction (JS) of employees in the public sector of Guangzhou. Another purpose of the paper is to discuss the structure of behavior under the Chinese public sector's traditional culture, from the perspective of integration of three different mechanisms of behavior (ration, norm and affective).
Design/methodology/approach
The paper modified the PSM questionnaire, based on Perry's PSM scale, according to Chinese cultural customs. The data of public service motivation, job satisfaction and organizational citizenship behavior were collected by randomly sampling from the employees in the public sector of Guangzhou. Results were obtained through structural equation modelling for the examination of multiple relationships between PSM and its dimensions, and the consequences; and ANOVA for testing the difference between groups.
Findings
It was found that there are significant differences between groups in the PSM level and correlations exist between PSM, and JS, OCB.
Originality/value
This paper contributes to the literature regarding PSM by examining the relationship between the dimensions of PSM and the consequence variables of OCB and JS against a Chinese cultural background. The paper presents the findings as a model to show the dynamics in these relationships. The integration of three different mechanisms of behavior is novel in the field of human resource management (HRM). The paper not only contributes to the further development of the field, but also implies healthier and more sustainable practices in public HRM.
Details
Keywords
Xiaogang He, Zhixin Wang, Lin Mei and Yanling Lian
The purpose of this paper is to assess the immediate and lagged effects of founder's turnover on firm performance, and test the moderating effects of enterprise scale and…
Abstract
Purpose
The purpose of this paper is to assess the immediate and lagged effects of founder's turnover on firm performance, and test the moderating effects of enterprise scale and founders' tenure on enterprise performance.
Design/methodology/approach
The paper selects 307 listed companies founded by founder from the Listed Company's Financial Database provided by the China Center for Economic Research. Based on 1,535 observations, this paper tests the relationship between founder turnover and performance by using the random effect model and the fixed effect model.
Findings
It is found that founders' turnover will have a significant immediate and negative effect on firm performance. There exists a lagged effect of founders' turnover, but this lagged effect is not as strong as immediate effect. It is also found that the effect of founders' turnover has been moderated by firm size and founders' characteristics.
Practical implications
Founders should choose an appropriate time of leaving when the firm's performance has reached a level high enough for the successor to have a better chance of improving its future operations.
Originality/value
Although some scholars have recognized the special role of founders and that enterprises' performances are mainly determined by the founders, few have studied founders' turnover on firm performance directly and empirically. This paper expands understanding of the founders' departure behavior on firm performance.
Details
Keywords
This chapter examines the trend in school enrollment and transitions to senior high school and to college in China for selected young cohorts since the 1990s, based on the…
Abstract
This chapter examines the trend in school enrollment and transitions to senior high school and to college in China for selected young cohorts since the 1990s, based on the analyses of the sample data from population censuses in 1990 and 2000 and the mini-census in 2005. We pay particular attention to educational inequality based on gender and the household registration system (hukou) in the context of educational expansion. Results show a substantial increase in educational opportunities over time at all levels. In particular, women have gained relatively more; gender inequality has decreased over time, and the gap in college enrollments was even reversed to favor women in 2005. However, rural–urban inequality was enlarged in the 1990s. The educational expansion has mainly benefited females and urban residents.
The purpose of this paper is to examine the branding of the Cynical Realist and Political Pop contemporary art movements in China. The trajectory this brand has taken over the…
Abstract
Purpose
The purpose of this paper is to examine the branding of the Cynical Realist and Political Pop contemporary art movements in China. The trajectory this brand has taken over the past 25 years reveals some of the power discourses that operate within the international visual arts market and how these are constructed, distributed and consumed.
Design/methodology/approach
A review of avant-garde art in China and its dissemination is undertaken through analysis of historical data and ethnographic data collected in Beijing, Shanghai and Hong Kong.
Findings
The analysis exposes the ideological framework within which the art market operates and how this affects the art that is produced within it. In the case of Cynical Realism and Political Pop, the art was framed and packaged by the art world to reflect Western liberal political thinking in terms of personal expression thereby implicitly justifying Western democratic, capitalist values.
Research limitations/implications
As an exploratory study, findings contribute to macro-marketing research by demonstrating how certain sociopolitical ideas develop and become naturalised through branding discourses in a market system.
Practical implications
A socio-cultural branding approach to the art market provides a macro-perspective in terms of the limitations and barriers for artists in taking their work to market.
Originality/value
While there have been various studies of branding in the art market, this study reveals the power discourses at work in the contemporary visual arts market in terms of the work that is promoted as “hot” by the art world. Branding here is shown to reflect politics by circulating and promoting certain sociocultural and political ideas.
Details
Keywords
The purpose of this paper is to assess the recent emergence of contemporary art in Asia from a macro, sociocultural perspective.
Abstract
Purpose
The purpose of this paper is to assess the recent emergence of contemporary art in Asia from a macro, sociocultural perspective.
Design/methodology/approach
This commentary is based on secondary research and recent visits to contemporary art centres in major cities across Asia.
Findings
The author argues that contemporary art in Asia emerges by extension of the Western contemporary art world and suggests that more must be done if Asia is to create a contemporary art world that is both internationally recognised and distinct from its Western precedent.
Originality/value
This commentary debunks the hyperbole surrounding contemporary art in Asia as a regional phenomenon and provides a critical examination of the global (power) dynamics at play.
Details
Keywords
The purpose of this paper is to define and characterise the precise nature of these cultural systems and their resulting impact on the respective art and artists of each…
Abstract
Purpose
The purpose of this paper is to define and characterise the precise nature of these cultural systems and their resulting impact on the respective art and artists of each territory, by ascertaining the impact on those systems of their respective government and governance.
Design/methodology/approach
This paper is based on three approaches to art market modelling. All three are based on political ideologies. The first, which typifies the art markets of Western Europe and the USA, is predicated on a Pluralist and Neo-Liberal ideology. The others correspond to the systems of government in China, Taiwan, South Korea and Japan.
Findings
It has been shown in this paper that political systems and their accompanying ideology, born of cultural preferences, have impacted on the art markets of China, Taiwan, South Korea and Japan. It has been demonstrated that all four markets are employing variants of the international norm.
Research limitations/implications
The art that is exported from East Asia will only be accepted by East Asian national markets when East Asian art markets exercise a majority influence on emerging and transitional markets. It is not the intention of this paper to pursue this thought beyond the possibility that it may occur.
Practical implications
The ineluctable conclusion is, therefore, that the global art market is moving towards a bipolar affair.
Social implications
This paper also suggests the disengagement of East Asian and Chinese “culture” and art from a global (western) norm and production and consumption of national culture in East Asia by East Asians.
Originality/value
The paper looks (for the first time) at the direct (and subliminal) influence of political systems on art markets and the consequential effects of political ideology on the art markets of East Asia and China. The paper arrives at a series of precise definitions for the way that these art markets operate.
Details
Keywords
Ying Zhang, Ann Marie Fiore, Ling Zhang and Xiaogang Liu
To examine the relationships among website design features, consumer experience responses and patronage intention toward online mass customization (OMC) apparel websites.
Abstract
Purpose
To examine the relationships among website design features, consumer experience responses and patronage intention toward online mass customization (OMC) apparel websites.
Design/methodology/approach
A total of 312 useable online surveys were obtained from Mainland China consumers. Multi-item scales were adopted to measure eight constructs: visual design; information quality; entertainment, aesthetic, educational, escapist experiences; flow; and patronage intention. Structural equation modeling (SEM) was conducted to determine factor structures and to test the hypothesized relationships among website design features, 4Es (entertainment, aesthetic, educational and escapist experiences), flow and consequent purchase intention toward OMC apparel websites.
Findings
All hypotheses, but one, were supported. OMC website visual design; information quality; and entertainment, aesthetic and educational experiences had a positive effect on consumer patronage intention.
Research limitations/implications
Limitations include using a sample of consumers from major cities in China; results cannot be generalized to all Chinese consumers. Websites were not actively navigated. Additionally, the present study examined only two dimensions of OMC website quality, visual design and information quality; more tangible and specific features could be considered in future research.
Practical implications
The findings provide website designers and marketers with insights into experiences that may lead to an increase in patronage intention toward OMC websites.
Originality/value
The study provides evidence that flow helps explain the impact of experiential value (i.e. 4Es) from website design features on patronage intention.