Ning Qian, Muhammad Jamil, Wenfeng Ding, Yucan Fu and Jiuhua Xu
This paper is supposed to provide a critical review of current research progress on thermal management in grinding of superalloys, and future directions and challenges. By…
Abstract
Purpose
This paper is supposed to provide a critical review of current research progress on thermal management in grinding of superalloys, and future directions and challenges. By understanding the current progress and identifying the developing directions, thermal management can be achieved in the grinding of superalloys to significantly improve the grinding quality and efficiency.
Design/methodology/approach
The relevant literature is collected from Web of Science, Scopus, CNKI, Google scholar, etc. A total of 185 literature is analyzed, and the findings in the literature are systematically summarized. In this case, the current development and future trends of thermal management in grinding of superalloys can be concluded.
Findings
The recent developments in grinding superalloys, demands, challenges and solutions are analyzed. The theoretical basis of thermal management in grinding, the grinding heat partition analysis, is also summarized. The novel methods and technologies for thermal management are developed and reviewed, i.e. new grinding technologies and parameter optimization, super abrasive grinding wheel technologies, improved lubrication, highly efficient coolant delivery and enhanced heat transfer by passive thermal devices. Finally, the future trends and challenges are identified.
Originality/value
Superalloys have excellent physical and mechanical properties, e.g. high thermal stability, and good high-temperature strength. The superalloys have been broadly applied in the aerospace, energy and automobile industries. Grinding is one of the most important precision machining technologies for superalloy parts. Owing to the mechanical and physical properties of superalloys, during grinding processes, forces are large and a massive heat is generated. Consequently, the improvement of grinding quality and efficiency is limited. It is important to conduct thermal management in the grinding of superalloys to decrease grinding forces and heat generation. The grinding heat is also dissipated in time by enhanced heat transfer methods. Therefore, it is necessary and valuable to holistically review the current situation of thermal management in grinding of superalloys and also provide the development trends and challenges.
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Qinglong An, Yucan Fu and Jiuhua Xu
Grinding may generate high temperature along the arc of grinding zone, especially during the grinding process of difficult‐to‐machine materials. It can cause thermal damage to the…
Abstract
Purpose
Grinding may generate high temperature along the arc of grinding zone, especially during the grinding process of difficult‐to‐machine materials. It can cause thermal damage to the ground surface and poor surface integrity. Conventional cooling methods based on large amounts of water‐oil emulsions can be both ineffective and environmentally unacceptable. The purpose of this paper is to offer a new high efficiency cooling method – cryogenic pneumatic mist jet cooling (CPMJ) to enhance heat transfer in the grinding zone during grinding of difficult‐to‐machine materials.
Design/methodology/approach
CPMJ equipment is a set up, which can produce water mist of −5°C with jet velocity above 150 m/s and mean particle size below 20 μm at the impingement distance of 10‐40 mm on the symmetry axis. To validate the cooling efficiency of CPMJ equipment, heat transfer experiments were carrying out on it. Finally, CPMJ was applied to the grinding of titanium alloy to verify its cooling effects.
Findings
With high penetrative power and water mist of −5°C, CPMJ can greatly improve heat transfer efficiency in the grinding zone. Experimental results, including heat transfer experiments and grinding experiments, indicate that CPMJ has strong cooling ability and can offer better cooling effects compared with cold air jet and traditional flood cooling method. With CPMJ cooling method, grinding zone temperature can be effectively reduced and good surface quality can be achieved during grinding of titanium alloy.
Originality/value
CPMJ cooling method is an effective and pollution‐free way to solve the thermal problems during grinding of difficult‐to‐machine materials.
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Han Ren, Charles Weizheng Chen, Jiuhua Cherrie Zhu and Yuling Chen
This paper aims to explore the extent to which unionized employees are dissatisfied in Chinese Enterprise Trade Unions (CETUs) when they perceive high levels of the triple-role…
Abstract
Purpose
This paper aims to explore the extent to which unionized employees are dissatisfied in Chinese Enterprise Trade Unions (CETUs) when they perceive high levels of the triple-role conflicts, as well as whether rights expectations will moderate these relationships. The authors define CETUs' triple-role conflicts as the extent to which CETUs and their cadres prioritize fulfilling the roles of preserving social stability (“peace”) and/or maintaining the production order (“production”) over protecting worker's rights and interests (“workers” rights).
Design/methodology/approach
Pilot study developed the scales via both qualitative and quantitative studies, which include item generation using the transcript of individual interviews with 36 informants, and exploratory factor analyses with 106 respondents. The study used a sample of 327 employees from more than 20 firms in North and Southwest China.
Findings
Results indicate high reliability and validity of the scales and provide largely consistent supports for our hypotheses: three dimensions of triple-role conflicts are negatively related to employees' satisfaction in CETUs, and rights expectations moderate these relationships.
Originality/value
This study developed three scales to respectively measure CETUs' triple-role conflicts, rights expectation and satisfaction in CETUs. More importantly, the findings shed light on the moderating mechanism of rights expectation in the relationships between triple-role conflicts and satisfaction in CETUs.
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Conservation of green space is crucial to the sustainable urban development of China. Nanjing is a central city in the Yangtze River Delta cluster in eastern China. Owing to…
Abstract
Conservation of green space is crucial to the sustainable urban development of China. Nanjing is a central city in the Yangtze River Delta cluster in eastern China. Owing to urbanization, the green spaces in this city have been affected significantly in terms of their scale and structure. Assessing such changes can provide a basis for environmental protection measures and sustainable development. Using Landsat remote-sensing image data from 1998 and 2007, we constructed a distribution map of the patches of green spaces in Nanjing, and analyzed and assessed the changes in scale and spatial layout of the green spaces using various landscape metrics including CA, PLAND, PD, MPS, LPI, NP, PD, TE, ED, MPI, and LSI. Coinciding with a sharp increase in urban population, the area of green spaces in Nanjing decreased by 27.06% between 1998 and 2007. The patches of green space increased by 39%, and the average area per patch decreased by about 47.52%. Green space patches were found to be unevenly distributed among the districts of Nanjing. In urban areas, significant numbers of such patches were found primarily in various types of parks, while in suburban areas, they were concentrated mainly in the hilly forestlands. Green spaces exhibited tendencies towards fragmentation, miniaturization, and discretization.
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Mingqiong Mike Zhang, Jiuhua Cherrie Zhu, Helen De Cieri, Nicola McNeil and Kaixin Zhang
In a complex, ever-changing, and turbulent business world, encouraging employees to express their improvement-oriented novel ideas through voice behavior is crucial for…
Abstract
Purpose
In a complex, ever-changing, and turbulent business world, encouraging employees to express their improvement-oriented novel ideas through voice behavior is crucial for organizations to survive and thrive. Understanding how to foster employee promotive voice at work is a significant issue for both researchers and managers. This study explores how to foster employee promotive voice through specific HRM practices and positive employee attitudes. It also examines the effect of employee promotive voice on perceived organizational performance.
Design/methodology/approach
This study employed a time-lagged multisource survey design. Data were collected from 215 executives, 790 supervisors, and 1,004 employees in 113 firms, and analyzed utilizing a multilevel moderated serial mediation model.
Findings
The findings of this study revealed that promotive voice was significantly related to perceived organizational performance. Innovation-enhancing HRM was positively associated with employee promotive voice. The HRM-voice relationship was partially mediated by employee job satisfaction. Power distance orientation was found to significantly moderate the relationship between innovation-enhancing HRM and employee job satisfaction at the firm level. Our findings showed that innovation-enhancing HRM policies may fail to foster promotive voice if they do not enhance employee job satisfaction.
Originality/value
This study challenges some taken-for-granted assumptions in the literature such as any high performance HRM bundles (e.g. HPWS) can foster employee promotive voice, and the effects of HRM are direct and even unconditional on organizational outcomes. It emphasizes the need to avoid potential unintended effects of HRM on employee voice and the importance of contextualizing voice research.
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Huma Bashir, Mumtaz Ali Memon and Nuttawuth Muenjohn
Promoting a safe workplace for everyone is a key tenet of Sustainable Development Goal 8 (SDG-8), which focuses on promoting inclusive and sustainable economic growth, employment…
Abstract
Purpose
Promoting a safe workplace for everyone is a key tenet of Sustainable Development Goal 8 (SDG-8), which focuses on promoting inclusive and sustainable economic growth, employment and decent work for all. Therefore, this study explores how responsible leadership ensures a psychologically safe workplace for everyone, leveraging employee-oriented human resource management. Specifically, drawing on signalling theory, this study aims to examine the impact of responsible leadership on employee-oriented HRM and the subsequent effect of employee-oriented HRM on employees' psychological safety. Furthermore, it investigates the mediating role of employee-oriented HRM in the relationship between responsible leadership and psychological safety.
Design/methodology/approach
Data was collected from banking professionals through a survey questionnaire. A total of 270 samples were collected using both online and face-to-face data collection strategies. The data was analysed using the Partial Least Squares Structural Equation Modelling (PLS-SEM) approach.
Findings
The findings reveal that responsible leadership ensures employee-oriented HRM, which subsequently enhances employees' psychological safety. Further, the results suggest that employee-oriented HRM acts as a mediator between responsible leadership and psychological safety.
Originality/value
Past studies have often emphasized HRM practices as antecedents of various attitudes and behaviours. The present study offers a novel contribution by conceptualizing and empirically validating employee-oriented HRM as a mechanism that links responsible leadership and psychological safety. It stands as the first of its kind to establish this significant relationship, shedding new light on the dynamics between responsible leadership, HRM practices and employees' sense of psychological safety.
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Vui-Yee Koon and Yuka Fujimoto
Organizations that prioritize humanistic responsibility create an environment of value for their employees as the most important stakeholders. However, despite the numerous…
Abstract
Purpose
Organizations that prioritize humanistic responsibility create an environment of value for their employees as the most important stakeholders. However, despite the numerous corporate social responsibility (CSR) models and research highlighting stakeholder considerations, the long-standing “social” aspect of CSR has inhibited its humanism responsibility. In response, this study proposes to move beyond the antecedents and outcomes of CSR to explore how perceived CSR can promote its humanistic responsibility both inside and outside of organizations.
Design/methodology/approach
The authors followed Sendjaya et al. (2008) ’s methodology for developing and validating the perceived corporate humanistic responsibility (CHR) scale. Study 1 validated the CHR's content. Study 2 established the measure’ reliability, internal consistency, unidimensionality and discriminant validity. The authors describe each of the studies in the forthcoming sections.
Findings
This research has produced a comprehensive set of perceived CHR items for business leaders based on earlier CHR/humanism concepts. Through the deconstruction of CHR theory, the granular conceptualization provides employee-centric workplaces, healthy internal communication, holistic compensation, CSR-committed behaviors and holistic training and development, equipped to assess how their CHR fosters humanistic workplaces that encourage socially responsible behaviors. This, in turn, would have an immense impact on employee well-being that, in turn, flourishes societal well-being.
Research limitations/implications
Although the perceived CHR scale's psychometric properties were confirmed using multiple tests ranging from qualitative to quantitative studies, this newly developed scale requires further investigation to explore whether internal or external relevance factors affect organizations' humanistic responsibility.
Practical implications
CSR is about caring for humans and the planet. The authors have unpacked what and how the human side of CSR operates for business leaders to advance their CHR practices and responsible management learning. The perceived CHR dimensions can guide business leaders to promote multidimensional humanistic behaviors inside and outside workplaces that transcend how to strengthen the humanistic responsibility behaviors of corporations to promote CHR by articulating how the “Social” aspect of CSR ought to function for employee well-being first.
Social implications
This study responds to Sustainable Development Goals (SDGs) most aligned with the SDG 3 (good health and well-being) and SDG 8 (decent work and economic growth) by promoting humanistic workplaces with implications for United Nation's Principles for Responsible Management that encourages universities to educate students on humanism concepts in business management.
Originality/value
The originality lies in the empirical study of CHR. By incorporating the original concepts of humanism/humanistic management and CHR, the authors empirically articulate how CHR may be practically implemented as an elaborated humanistic synthesis for corporations.
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Haiyong Wu, Hui Huang and Xipeng Xu
The wear of an abrasive single-crystal diamond (SCD) grit affects the machining quality of the sapphire wafer. This paper aims to investigate the influence of crystallographic…
Abstract
Purpose
The wear of an abrasive single-crystal diamond (SCD) grit affects the machining quality of the sapphire wafer. This paper aims to investigate the influence of crystallographic orientation on the wear characteristics of SCD grit scratching on sapphire.
Design/methodology/approach
The wear characteristics of two SCD grits (SCD100 and SCD111) with different crystallographic orientations were systematically investigated. The wear mechanism involved in the scratching process was explored. The wear morphology, scratching forces and friction coefficient during the scratching process were measured and analyzed.
Findings
The experiment results show that the wear progress of the two SCD grits is obviously different. The wear resistance of SCD111 grit is greater than that of SCD100 grit in normal wear stage. However, the SCD100 grit could remove more sapphire material than SCD111 grit. The SCD grits mainly sustain extrusion stress and shear stress during scratching on sapphire. The crystallographic orientation of SCD grits plays a significant role in the wear progress during scratching on sapphire.
Originality/value
The results of the experimental studies could provide a theoretical foundation for improving the fabrication of abrasive diamond tools.
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Jau Yang Liu, William Shiue, Fu Hsiang Chen and Ai Ting Huang
Corporate social responsibility has gradually become an essential enterprise responsibility under stakeholders’ expectations. Employee care strategies involve both qualitative and…
Abstract
Purpose
Corporate social responsibility has gradually become an essential enterprise responsibility under stakeholders’ expectations. Employee care strategies involve both qualitative and quantitative factors and are receiving special attention with the advent of the information age. In previous studies, a company’s policy of employee care may not fit with the needs of the employees. Consequently, the purpose of this paper is to investigate enterprises’ employee care from the employee’s perspective by adopting a hybrid multiple attribute decision making (MADM) model.
Design/methodology/approach
This study is based on 159 interviews with senior employees and/or department managers using a survey questionnaire. This study uses the MADM model to conduct the analysis. First, this research study used Decision-Making Trial and Evaluation Laboratory (DEMATEL) to construct an influential network relations map of the 4 dimensions and 13 criteria of employee care. Second, this study uses DEMATEL-based Analytic Network Process to conduct a weight analysis for each dimension and criterion. Third, this study uses VIKOR to calculate employees’ level of satisfaction as well as the gap from the “aspired level.”
Findings
The results of the study revealed the critical factors influencing employee care and proposed a systematic plan to be used as a reference for improvement. The improvement sequence revealed the following order: Equal employment opportunities→Good industrial relations and benefits→Responsibility to train and educate employees→Occupational health and safety. The empirical results showed there was still 35 percent room for improvement in the enterprises’ implementation policy of employee care.
Originality/value
The implementation of employee care has become an important issue for corporations since it helps to sustain and to increase an enterprise’s competitiveness in the business environment. However, the extant literature on employee care comes from enterprises’ perspectives instead of from employees’ perspectives. This research investigates the key factors of employee care and successfully shows MADM to be an effective model for the planning and implementation of corporate social responsibilities’ employee care from the perspective of employees.
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Chih-Ming Chen and Xian-Xu Chen
This study aims to develop an associative text analyzer (ATA) to support users in quickly grasping and interpreting the content of large amounts of text through text association…
Abstract
Purpose
This study aims to develop an associative text analyzer (ATA) to support users in quickly grasping and interpreting the content of large amounts of text through text association recommendations, facilitating the identification of the contextual relationships between people, events, organization and locations for digital humanities. Additionally, by providing text summaries, the tool allows users to link between distant and close readings, thereby enabling more efficient exploration of related texts.
Design/methodology/approach
To verify the effectiveness of this tool in supporting exploration of historical texts, this study uses a counterbalanced design to compare the use of the digital humanities platform for Mr. Lo Chia-Lun’s Writings (DHP-LCLW) with and without the ATA to assist in exploring different aspects of text. The study investigated whether there were significant differences in effectiveness for exploring textual contexts and technological acceptance as well as used semi-structured in-depth interviews to understand the research participants’ viewpoints and experiences with the ATA.
Findings
The results of the experiment revealed that the effectiveness of text exploration using the DHP-LCLW with and without the ATA varied significantly depending on the topic of the text being explored. The DHP-LCLW with the ATA was found to be more suitable for exploring historical texts, while the DHP-LCLW without the ATA was more suitable for exploring educational texts. The DHP-LCLW with the DHP-LCLW was found to be significantly more useful in terms of perceived usefulness than the DHP-LCLW without the ATA, indicating that the research participants believed the ATA was more effective in helping them efficiently grasp the related texts and topics during text exploration.
Practical implications
The study’s practical implications lie in the development of an ATA for digital humanities, offering a valuable tool for efficiently exploring historical texts. The ATA enhances users’ ability to grasp and interpret large volumes of text, facilitating contextual relationship identification. Its practical utility is evident in the improved effectiveness of text exploration, particularly for historical content, as indicated by users’ perceived usefulness.
Originality/value
This study proposes an ATA for digital humanities, enhancing text exploration by offering association recommendations and efficient linking between distant and close readings. The study contributes by providing a specialized tool and demonstrating its perceived usefulness in facilitating efficient exploration of related texts in digital humanities.