Nataliya Perevoshchikova, Jordan Rigaud, Yu Sha, Martin Heilmaier, Barrie Finnin, Elena Labelle and Xinhua Wu
The Ni-based superalloy IN-738 LC is known to be susceptible to porosity and different types of cracking during the build-up process and, thus, challenging to manufacture using…
Abstract
Purpose
The Ni-based superalloy IN-738 LC is known to be susceptible to porosity and different types of cracking during the build-up process and, thus, challenging to manufacture using selective laser melting (SLM). Determining a feasible set of operating parameters for SLM of nickel-based superalloys involves new approach to experimental design based on the Doehlert method that assists in determining an optimal (feasible) set of operating parameters for SLM of IN-738 LC powder alloy.
Design/methodology/approach
The SLM parameters are evaluated in terms of their effectiveness in obtaining the microstructure with a porosity content of <0.5 per cent and without micro-cracking. The experimental approach is exemplified with the Doehlert matrix response variable, relative density, by comparing Archimedes method with microstructural assessments of pores and cracks from image analysis. The effect of heat treatment (HT) and hot isostatic pressing (HIP) on the microstructure of the SLMed IN-738 LC powder alloy has been examined and the consequential tensile response characterised.
Findings
By using optimised process parameters (low heat input, medium scanning speed and small hatching distance) which provides medium energy density, samples of IN-738 LC with a macroscopic porosity <0.5 per cent and free of micro-cracks can be manufactured by SLM. The results indicate that HIP of SLMed material did not lead to a noticeable effect on mechanical properties compared to HT of SLMed material suggesting that the level of both porosity and crack density might be already below the detection limit for the mere heat-treated material.
Originality/value
SLM processing parameters (power, scan speed, hatching distance) for IN-738 LC were successfully optimised after only 14 experiments using Doehlert design. Two independent methods, Archimedes method and image analysis, were used in this study to assess relative density of SLM-produced samples with sets of processing parameters showing coherency in prediction with predicted response by Doehlert design.
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In today’s Taiwan, sha-cha sauce is an indispensable ingredient for beef hot pot and stir-fried dishes. The purpose of this paper contextualizes the history of sha-cha sauce in…
Abstract
Purpose
In today’s Taiwan, sha-cha sauce is an indispensable ingredient for beef hot pot and stir-fried dishes. The purpose of this paper contextualizes the history of sha-cha sauce in Tainan, the oldest city in Taiwan, and argues that sha-cha sauce, introduced by Chaoshan immigrants, has contributed to new styles and habits of beef consumption tastes and habits in the post-1949 Tainan and beyond.
Design/methodology/approach
This paper uses documentary materials, oral interviews and diaries to explore the relationship between beef consumption and sha-cha sauce. It begins with an historical overview of Taiwan’s beef consumption during the Japanese colonial era (1895-1945). Then, it focuses on two Chaoshan business enterprises: the Bull-Head, which makes the world’s largest “canned sha-cha sauce,” and the Xiao Haozhou, a Tainan restaurant specializing in sha-cha beef hot pot. Finally, this study analyzes Xinrong Wu, a Tainan gentry whose diary entries from 1933 to 1967 documented the changing dietary habits of beef consumption among Taiwanese.
Findings
The Chaoshan migrants played an important role in introducing the sha-cha sauce to postcolonial Tainan, and this input bolstered the beef consumption among Taiwanese. The production of sha-cha provided a reliable source of income for these migrants in Tainan, and major businesses like the Bull-Head became the international brands of Taiwanese food products.
Research limitations/implications
The study, though limited to Tainan, reveals the symbiosis between popularization of sha-cha sauce and widespread beef consumption in Taiwan.
Practical implications
This study helps researchers examine the connection between Chinese migrations and food culture.
Originality/value
This paper is an original scholarly investigation of the relationship between food diet and Chaoshan migration in postcolonial Tainan.
Isabella Maria Weber and Gregor Semieniuk
American radical economists in the 1960s perceived China under Maoism as an important experiment in creating a new society, aspects of which they hoped could serve as a model for…
Abstract
American radical economists in the 1960s perceived China under Maoism as an important experiment in creating a new society, aspects of which they hoped could serve as a model for the developing world. But the knowledge of “actually existing Maoism” was very limited due to the mutual isolation between China and the US. This chapter analyses the First Friendship Delegation of American Radical Political Economists (FFDARPE) to the People’s Republic of China in 1972, consisting mainly of Union for Radical Political Economics (URPE) members, which was the first visit of a group of American economists to China since 1949. Based on interviews with trip participants as well as archival and published material, this chapter studies what we can learn about the engagement with Maoism by American radical economists from their dialogues with Chinese hosts, from their on-the-ground observations, and their reflection upon return. We show how the visitors’ own ideas conflicted and intersected with their perception of the Maoist practice on gender relations, workers’ management, and life in the communes. We also shed light on the diverging conceptions of the role for economic expertise between URPE and late Maoism. As the first in-depth study on the FFDARPE, we provide rich empirical insights into an ice-breaking event in the larger process of normalization in the Sino-US relations, which ultimately led to the disillusionment of the Left with China.
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Tong-Tong Lin, Ming-Zhi Yang, Lei Zhang, Tian-Tian Wang, Yu Tao and Sha Zhong
The aerodynamic differences between the head car (HC) and tail car (TC) of a high-speed maglev train are significant, resulting in control difficulties and safety challenges in…
Abstract
Purpose
The aerodynamic differences between the head car (HC) and tail car (TC) of a high-speed maglev train are significant, resulting in control difficulties and safety challenges in operation. The arch structure has a significant effect on the improvement of the aerodynamic lift of the HC and TC of the maglev train. Therefore, this study aims to investigate the effect of a streamlined arch structure on the aerodynamic performance of a 600 km/h maglev train.
Design/methodology/approach
Three typical streamlined arch structures for maglev trains are selected, i.e. single-arch, double-arch and triple-arch maglev trains. The vortex structure, pressure of train surface, boundary layer, slipstream and aerodynamic forces of the maglev trains with different arch structures are compared by adopting improved delayed detached eddy simulation numerical calculation method. The effects of the arch structures on the aerodynamic performance of the maglev train are analyzed.
Findings
The dynamic topological structure of the wake flow shows that a change in arch structure can reduce the vortex size in the wake region; the vortex size with double-arch and triple-arch maglev trains is reduced by 15.9% and 23%, respectively, compared with a single-arch maglev train. The peak slipstream decreases with an increase in arch structures; double-arch and triple-arch maglev trains reduce it by 8.89% and 16.67%, respectively, compared with a single-arch maglev train. The aerodynamic force indicates that arch structures improve the lift imbalance between the HC and TC of a maglev train; double-arch and triple-arch maglev trains improve it by 22.4% and 36.8%, respectively, compared to a single-arch maglev train.
Originality/value
This study compares the effects of a streamlined arch structure on a maglev train and its surrounding flow field. The results of the study provide data support for the design and safe operation of high-speed maglev trains.
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Ken Richardson, Andrew Tarr, Sonja Miller, Nokuthaba Sibanda, Liz Richardson, Kirikowhai Mikaere, Shona de Sain, Hazel Phillips and Vivian Wei
Māori (Indigenous New Zealanders) and Pacific students tend not to attain the same levels of educational success as New Zealanders of European descent. Addressing this problem is…
Abstract
Māori (Indigenous New Zealanders) and Pacific students tend not to attain the same levels of educational success as New Zealanders of European descent. Addressing this problem is a particular challenge at tertiary level in science, engineering, and architecture and design (SEAD). Te Rōpū Āwhina (Āwhina), an initiative at Victoria University of Wellington (VUW), aims to produce Māori and Pacific professionals who contribute to Māori and Pacific development and leadership. The objective of this analysis was to summarise quantitative results from the first 11 years of Āwhina and to show they are consistent with an Āwhina ‘effect’; that is, a positive influence on (combined) Māori and Pacific success in the SEAD disciplines. Individual-level records held in the VUW student database were used to generate smoothed trends in SEAD and non-SEAD graduate and postgraduate degree completions since 1991. Substantial improvements in SEAD Māori and Pacific completions occurred between 1999 and 2010, including a 50%- increase in Māori and Pacific postgraduate completions relative to all SEAD postgraduate completions. In the same period, non-SEAD Māori and Pacific postgraduate completions increased at a similar rate to all non-SEAD postgraduate completions. Results were consistent with a strong Āwhina effect, which has important implications for the nature of tertiary institutions, their cultural and social disconnection with Indigenous and minority students, and their social obligations and responsiveness. This analysis did not account for students who did not complete a qualification or include key confounders such as entry qualifications and gender. Definitive confirmation of an Āwhina effect is the subject of ongoing research.
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Benonia Tinarwo, Farzad Rahimian and Dana Abi Ghanem
The aim of this paper is to discuss a selection of policy strategies, regional initiatives and market approaches to uncover the realities of twenty-first-century building energy…
Abstract
Purpose
The aim of this paper is to discuss a selection of policy strategies, regional initiatives and market approaches to uncover the realities of twenty-first-century building energy performance. A position that market-based approaches, human influence and policy interventions are part of an ecosystem of building energy performance is presented.
Design/methodology/approach
An exploratory search of secondary sources spanning the last three decades was conducted. Both peer-reviewed and grey literature were included to capture a broader understanding of the discourse in literature. Research questions guided the literature search, and a data extraction tool was designed to categorise the literature. The primary limitation of this study is that only a few applications could be discussed in a condensed format.
Findings
Several challenges about the current status quo of building energy performance were identified and summarised as follows. (1) Inconsistencies in measurement and verification protocols, (2) Impacts of market approaches, (3) National policy priorities that are at variance with regional targets and (4) Ambiguous reporting on environmental impacts of energy efficiency (EE) technologies.
Practical implications
The practical implications of the findings in this paper for practice and research are that as part of the building energy performance ecosystem, national responses through government interventions must become adaptive to keep up with the fast-paced energy sector and social trends. Simultaneously, before market-based approaches overcome the messiness of socio-economic dynamics, institutional conditions and cultural nuances, they ought to transparently address environmental impacts and the infringement of several SDGs before they can become viable solutions to building energy performance.
Originality/value
This paper presents building energy performance as an ecosystem comprising human influence, market-based approaches and policy interventions which form interdependent parts of the whole. However, evidence in the literature shows that these aspects are usually investigated separately. By presenting them as an ecosystem, this paper contributes to the discourse by advocating the need to re-align building energy performance to socio-economic-political dynamics and contextually viable solutions.
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Drawing on conservation of resources (COR) theory, this study examined the effect of developmental human resource (HR) practices on employee workplace procrastination and…
Abstract
Purpose
Drawing on conservation of resources (COR) theory, this study examined the effect of developmental human resource (HR) practices on employee workplace procrastination and investigated the mediation effect of boredom at work and the moderation effects of exploitative leadership and self-leadership.
Design/methodology/approach
Data were collected from 443 employees across companies in China. Hypotheses were tested using hierarchical regression analysis and indirect effect testing via bootstrapping in SPSS and Mplus.
Findings
This study found that developmental HR practices were negatively related to employee workplace procrastination and that boredom at work mediated the relationship between developmental HR practices and employee workplace procrastination. Moreover, exploitative leadership strengthened the negative relationship between developmental HR practices and boredom at work, whereas self-leadership weakened the positive relationship between boredom at work and employee workplace procrastination. The indirect relationship between developmental HR practices and employee workplace procrastination through boredom at work was moderated by exploitative leadership and self-leadership.
Originality/value
This study extended the literature on the antecedents of employee workplace procrastination. Moreover, by investigating the mediation effect of boredom at work, this study extended the underlying mechanism by which developmental HR practices affect subsequent employee outcomes. Finally, by testing the moderation effect of exploitative leadership and self-leadership, respectively, this study offered insights into the boundary conditions resultant from developmental HR practices.
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Xiaomi An, Wenlin Bai, Hepu Deng, Shuyang Sun, Yu Dong, Wenrui Zhong and Jufang Hu
This paper aims to develop a comprehensive concept map to guide adequate protection and effective management of personal information in the provision of networked services in…
Abstract
Purpose
This paper aims to develop a comprehensive concept map to guide adequate protection and effective management of personal information in the provision of networked services in China through comprehensively considering the multi-disciplinary perspective of personal information protection and management with respect to their multi-dimensional applications, multi-directional controls and multi-contextual analysis in today’s networked environments. There are different perspectives on what personal information protection and management is about, why and how personal information should be protected and managed in the literature. Little, however, is known about the relationships between these multiple perspectives and their implications to personal information protection and management in the real-world practice.
Design/methodology/approach
A multi-methods approach is adopted in the study, including a comprehensive review of the related literature, a content analysis of the relevant laws, polices, standards, a multi-cases study of the relevant network services providers and an online survey of the Chinese citizens who are the end-users of the networked services to adequately achieve the objective of this study. The concept map building technique is used as a tool for conducting the meta-synthesis of the findings from multiple data resources in the development of a comprehensive concept map for personal information protection and management.
Findings
This study rationalizes the importance of the identification of personal information for adequate protection and effective management. It identifies five perspectives on personal information protection and management, namely, law, economics, sociology, information technology and information resources management for their applications at the organizational level. Five types of personal information are identified in the study for protection and management, namely, identifiable personal information, personal identity information, personal moral right information, personal civil right and interest information and personal business and transaction information. An integrated approach consisting of risk control, security control and users control is proposed for personal information protection and management in the provision of networked services in China. The study shows that not enough attention has been paid to the personal information protection and management from multi-disciplinary perspectives with respect to their multi-dimensional applications, multi-directional controls and multi-contextual analysis in the literature. There is a lack of understanding of what, why and how personal information is protected and managed in real-world practices in China.
Practical implications
The investigation of the issues of personal information protection and management with respect to the relevant laws, polices, standards, networked services and organizations can lead to a better understanding of what, why and how personal information is protected and managed in real-world practices in China. The development of a comprehensive concept map for personal information protection and management can be used as an effective guideline for the formulation and implementation of appropriate strategies and policies in individual organizations for providing their stakeholders with quality-networked services in today’s highly connected network environment in China.
Originality/value
The paper is the first step of a comprehensive study on the protection and management of personal information for the provision of networked services in China. It provides a solid foundation for further research with respect to the personal information protection and management. It is the first of this kind of studies to answer the questions of what types of personal information needed to be protected, why and how they should be protected in conformity with laws, regulations, polices, standards and the needs of networked services and business activities of organizations.
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Kuifan Pan, Miguel Baptista Nunes and Guo Chao Peng
The purpose of this paper is to identify, assess and explore potential risks that can affect long‐term viability of enterprise resource planning (ERP) systems in the…
Abstract
Purpose
The purpose of this paper is to identify, assess and explore potential risks that can affect long‐term viability of enterprise resource planning (ERP) systems in the post‐implementation and exploitation phase.
Design/methodology/approach
The research took a large Chinese private group as a case study. A theoretical ERP risk ontology, which was adopted from the literature, was used to frame the study and generate data collection tools. Two questionnaires were thus designed and used to explore ERP post‐implementation risks in the case company.
Findings
The study identified 37 risk events, of which seven were identified as the most critical for ERP exploitation in the case company. The findings show that organisational and human‐related risks are the crucial factors for potential ERP failure and not the usually suspect technical risks.
Research limitations/implications
This study contributes to the knowledge of ERP in general, and provides valuable insights into ERP post‐implementation risks in large companies in particular.
Practical implications
The findings will not just be useful in supporting ERP risk identification and management in the large Chinese companies, but will also be beneficial to other large companies in general, which may be confronted with similar ERP exploitation challenges.
Originality/value
The majority of large companies in China and in the West have implemented ERP systems and engaged in the system post‐implementation phase. Most of the existing literature in the field focuses on the process of implementation. This paper looks forward to the risks involved in the post‐implementation phase. Understanding potential risks that may occur during ERP exploitation is vital for these large firms to achieve and sustain business success through their ERP systems.