Search results
1 – 10 of 12Dezhong Liao, Jieyu He, Lixin Mao and Yixue Xu
The aim of this work is to synthesize neopentyl glycol oligoesters based on adipic acid and rapeseed oil (NOAR) which may be used as the renewable and environmentally acceptable…
Abstract
Purpose
The aim of this work is to synthesize neopentyl glycol oligoesters based on adipic acid and rapeseed oil (NOAR) which may be used as the renewable and environmentally acceptable base fluids to replace mineral oils in the future.
Design/methodology/approach
Oligomeric intermediates were synthesized in the first esterification of neopentyl glycol with adipic acid and characterized by Gas Chromatography-Mass Spectrometer (GC-MS) to calculate the average oligomerisation degree. NOAR were synthesized in the second esterification of oligomeric intermediates with rapeseed oil fatty acid. The effects of average oligomerisation degree on the viscosity, viscosity index, pour point, oxidative stability and biodegradability of NOAR were investigated; the tribological properties and thermal stability of NOAR were evaluated by four-ball tribometer and TGA, respectively.
Findings
Results show that with the increase of average oligomerisation degree from 2.10 to 4.34, the viscosity of NOAR increased from 101.1 to 182.0 (mm2/s) at 40°C and 18.3 to 30.1 (mm2/s) at 100°, respectively, and their oxidation stability can be improved as well. The yields of NOAR were 83.3-89.4 per cent, and the evaluated properties were as follows: viscosity index of over 200, pour point of below −43°C, biodegradation rate of more than 96 per cent, maximum non-seizure load (PB value) of 784 N, wear scar diameters of 0.40 mm and thermal decomposition temperature of higher than 300°C.
Originality/value
This work provides a method to synthesize rapeseed oil-based oligoesters which can serve as the renewable and environmentally acceptable base fluids with tunable viscosity by controlling the oligomerisation degree of esterification.
Details
Keywords
Jieyu Zhou, Mengmeng Bu and Liangding Jia
The purpose of this paper is to investigate how CEO humility influences inter-firm collaboration (IFC) and the moderating roles of firm status (a firm's relative position in a…
Abstract
Purpose
The purpose of this paper is to investigate how CEO humility influences inter-firm collaboration (IFC) and the moderating roles of firm status (a firm's relative position in a social order) and environmental uncertainty on such an effect.
Design/methodology/approach
As the firms were nested in township clusters, the theoretical model was tested using hierarchical linear modeling to analyze a multisource and multilevel onsite survey from 254 firms in Chinese township clusters. CEO humility was measured using an 18-item scale reported by both the human resource managers and the financial managers. Besides using CEO self-reported ratings as the measurement of IFC, this study employed additional measurements to further validate the findings, including the IFC reported by the administrative managers and two alternative measures for IFC reported by both CEO and the administrative managers of each firm.
Findings
This study found that CEO humility is positively related to IFC (H1), and that this association is marginally more salient when firms have high status (H2) but less salient when firms face a high level of environmental uncertainty (H3).
Practical implications
Findings suggest that firms with humble CEOs may benefit from better inter-firm collaborative relationships, especially when firms have high status (i.e. possess many well-known trademarks), but not when they are in an uncertain environment.
Originality/value
Previous humility studies focused on the influence of leader humility on individual and team outcomes, but little attention has been paid to organizational outcomes. This research extends the implications of leader humility to inter-firm relationships. Moreover, this paper explores the boundary conditions of the influence of CEO humility, thus advancing the contextual understanding of leader humility.
Details
Keywords
Yuting Sun, Jieyu Ren, Gang Jin and Hanhui Hu
The Belt and Road Initiative (BRI) is the most comprehensive and substantial international cooperation platform, creating a new market influenced by economic and political…
Abstract
Purpose
The Belt and Road Initiative (BRI) is the most comprehensive and substantial international cooperation platform, creating a new market influenced by economic and political factors. In this paper, the authors aim to examine whether and how the BRI impacts the Chinese enterprises' corporate environmental responsibility (CER).
Design/methodology/approach
Based on China's listed firms' database from 2011 to 2018, the authors use the PSM-DID method, an econometrics method combined with propensity score matching (PSM) and difference-in-differences (DID), to conduct causal inference between the BRI and Chinese enterprises' CER and conduct a series of robustness analyses. Moreover, the authors explore the mechanisms underlying the main effect from both market and non-market perspectives.
Findings
The results suggest that the BRI significantly increases Chinese enterprises' CER. Further analyses show that market competition and government support are two possible mechanisms through which the BRI has an effect on the enterprises' CER.
Originality/value
The research study supplements existing work on the environmental effects of the BRI at a microlevel and adds to the literature on the drivers of CER. The findings offer valuable insights into governments and scholars by demonstrating that CER is a crucial tool for Chinese enterprises to gain a competitive advantage in the increasingly competitive markets along the BRI.
Details
Keywords
Jieyu Li, Libang Ma, Tianmin Tao, Zhihang Zhu and Sixia Li
By analyzing the mechanisms by which rural infrastructure resilience (RIR) impacted population loss in Longxi County, this study proposes measures to improve RIR, which provides a…
Abstract
Purpose
By analyzing the mechanisms by which rural infrastructure resilience (RIR) impacted population loss in Longxi County, this study proposes measures to improve RIR, which provides a practical reference for realizing China's rural revitalization strategy, besides providing ideas for alleviating population loss in similar regions around the world.
Design/methodology/approach
This study considered 213 administrative villages in Longxi County in the Longzhong loess hilly region as the evaluation unit. Based on the construction of a multidimensional RIR evaluation system, the spatial spillover effect of RIR on population loss was determined using the spatial Durbin model (SDM).
Findings
The average resilience of each subsystem of rural infrastructure in Longxi County was low, and there were large differences in the spatial distribution. The mean RIR index value was 0.2258, with obvious spatial directivity and agglomeration characteristics. The population loss index of Longxi County had a value of 0.1759, with 26.29 of villages having a high loss level. The population loss was relatively serious and was correlated with the spatial distribution of RIR. The villages with larger RIR index values had lower population loss. The RIR had a significant spatial spillover effect on population loss. Productive infrastructure resilience and living infrastructure resilience (LIR) had negative spillover effects on population loss, and social service infrastructure resilience (SSIR) had a positive spillover effect on population loss.
Originality/value
By analyzing the mechanisms by which RIR impacted on population loss in Longxi County, this study proposes measures to improve RIR, which provides a practical reference for realizing China's rural revitalization strategy, besides providing ideas for alleviating population loss in similar regions around the world.
Details
Keywords
Qiang Shen, Jieyu Liu, Huang Huang, Qi Wang and Weiwei Qin
The purpose of this study is to explore a signal processing method to improve the angular rate accuracy of micro-electro-mechanical system (MEMS) gyroscope by combining numerous…
Abstract
Purpose
The purpose of this study is to explore a signal processing method to improve the angular rate accuracy of micro-electro-mechanical system (MEMS) gyroscope by combining numerous gyroscopes.
Design/methodology/approach
To improve the dynamic performance of the signal processing method, the interacting multiple model (IMM) can be applied to the fusion of gyroscope array. However, the standard IMM has constant Markov parameter, which may reduce the model switching speed. To overcome this problem, an adaptive IMM filter is developed based on the kurtosis of the gyroscope output, in which the transition probabilities are adjusted online by utilizing the dynamic information of the rate signal.
Findings
The experimental results indicate that the precision of the gyroscope array composed of six gyroscopes increases significantly and the kurtosis-based adaptive Markov parameter IMM filter (K-IMM) performs better than the baseline methods, especially under dynamic conditions. These experiments prove the validity of the proposed fusion method.
Practical implications
The proposed method can improve the accuracy of MEMS gyroscopes without breakthrough on hardware, which is necessary to extend their utility while not restricting the overwhelming advantages.
Original/value
A K-IMM algorithm is proposed in this paper, which is used to improve the angular rate accuracy of MEMS gyroscope by combining numerous gyroscopes.
Details
Keywords
Robert G. Tian and Yan Wu
The purpose of this paper is to examine the construction of virtual community identities among Chinese internet users and their motivation for lurking, posting or flaming.
Abstract
Purpose
The purpose of this paper is to examine the construction of virtual community identities among Chinese internet users and their motivation for lurking, posting or flaming.
Design/methodology/approach
Taking Qiangguo Luntan as an online study site the authors apply an ethnographic approach for the research, a method that is becoming more and more favourable by scholars in study virtual communities. The data gathered are mainly through participant observation and in‐depth interviews.
Findings
The findings suggest that internet bulletin boards enable ordinary Chinese to have their identities as politically activated citizens constructed in cyberspace. A consistent enthusiasm for political participation can be found in user's pennames, signature files, political clusters, and online behaviours.
Originality/value
This is an original case study.
Details
Keywords
Friendships, an important form of people’s everyday relationships with others, have been studied by many scholars from different disciplines. However, there is limited research on…
Abstract
Friendships, an important form of people’s everyday relationships with others, have been studied by many scholars from different disciplines. However, there is limited research on friendship in the context of childhood, particularly that of Chinese rural children. This chapter presents findings from an in-depth study on Chinese children’s understandings and experiences of friendships with peers in the context of a rural primary boarding school. Data for this research were collected through an intensive five-month study, using an ethnographic approach, in a rural primary boarding school (given the pseudonym ‘Central Primary School’) in the western area of China in 2016. This chapter discusses parents’ influences on children’s selection of friends, particularly their ‘good’ friends, and their understandings of the functions of making friends in the context of rural China. It unpacks parents’ interventions on children’s friendships by discussing the moralised hierarchical relationship between children and their parents – children are expected to show obedience to parents. Then, it argues that the Confucian-collectivist values construct a relationship between a child’s individual achievement and their family’s collective good, which makes friendship not only an individual issue but also a collective one too.
Details
Keywords
Yu Huang, Xiaofen Ji, Lina Zhai and Francisca Margarita Ocran
Breast cancer has become the largest cancer in the world today. Health problems for women with breast cancer need to be addressed urgently. This study aims to select the best…
Abstract
Purpose
Breast cancer has become the largest cancer in the world today. Health problems for women with breast cancer need to be addressed urgently. This study aims to select the best method for preparing temperature-sensitive sports underwear, and to verify the feasibility of using K-type thermocouple threads in underwear fabrics.
Design/methodology/approach
In the experiments, two samples were designed for temperature-sensitive performance tests and the effects produced by different outer layer structures were investigated. In the second step, K-type thermocouple wires were integrated into sports underwear. The comfort and feasibility of the temperature-sensitive underwear were investigated.
Findings
It was finally verified to obtain the best comfort and temperature-sensing performance of K-type thermocouple filaments integrated into sports underwear with plain stitching.
Originality/value
The underwear has a certain prospect for the application of smart apparel based on breast cancer health monitoring, which is of some significance for monitoring smart apparel.
Details
Keywords
Based on in-depth interviews with 64 women in 5 Japanese firms, this chapter examines how women workers interpret workplace sexual behaviors and interactions in different…
Abstract
Based on in-depth interviews with 64 women in 5 Japanese firms, this chapter examines how women workers interpret workplace sexual behaviors and interactions in different organizational contexts. The chapter explores the processes by which workplace sexual interactions, including harmful behaviors, are normalized and tolerated. It discusses three types of sexual workplace interactions in Japanese firms: (1) taking clients to hostess clubs, which women workers often see as “a part of their job”; (2) playing the hostess role at after-work drinking meetings, where a certain amount of touching and groping by men is seen as “joking around” or simply as behavior that is to be expected from men; and (3) repetitive or threatening sexual advances occurring during normal working hours, which are seen as harassment and cause women to take corrective action. The chapter confirms previous studies that have shown that women's interpretations of sexual behaviors can vary from enjoyable to harmful, depending on the organizational contexts. The chapter also argues that Japanese organizational culture, through its normalization of male dominance and female subordination, fosters and obscures harmful behaviors. Eradicating harmful sexual behaviors will require firms to reevaluate sexualized workplace customs and mitigate the large gender gap in the organizational hierarchy in Japanese firms.