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Article
Publication date: 31 July 2019

Guohua Zhang, Xueting Liu, Bengt Ake Sundén and Gongnan Xie

This study aims to clarify the mechanism of film hole location at the span-wise direction of an internal cooling channel with crescent ribs on the adiabatic film cooling…

Abstract

Purpose

This study aims to clarify the mechanism of film hole location at the span-wise direction of an internal cooling channel with crescent ribs on the adiabatic film cooling performance, three configurations are designed to observe the effects of the distance between the center of the ellipse and the side wall(Case 1, l = w/2, Case 2, l = w/3 and for Case 3, l = w/4).

Design/methodology/approach

Numerical simulations are conducted under two blowing ratios (i.e. 0.5 and 1) and a fixed cross-flow Reynolds number (Rec = 100,000) with a verified turbulence model.

Findings

It is shown that at low blowing ratio, reducing the distance increases the film cooling effectiveness but keeps the trend of the effectiveness unchanged, while at high blowing ratio, the characteristic is a little bit different in the range of 0 = x/D =10.

Research limitations/implications

These features could be explained by the fact that shrinking the distance between the hole and side wall induces a much smaller reserved region and vortex downstream the ribs and a lower resistance for cooling air entering the film hole. Furthermore, the spiral flow inside the hole is impaired.

Originality/value

As a result, the kidney-shaped vortices originating from the jet flow are weakened, and the target surface can be well covered, resulting in an enhancement of the adiabatic film cooling performance.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 7 December 2022

Haowei Zhang, Lili Sun, Chengli Song, Ying Liu, Xueting Xuan, Fei Wang, Jing Zhong and Li Sun

Design, fabricate and evaluate all-solid-state wearable sensor systems that can monitor ion concentrations in human sweat to provide real time health analysis and disease…

Abstract

Purpose

Design, fabricate and evaluate all-solid-state wearable sensor systems that can monitor ion concentrations in human sweat to provide real time health analysis and disease diagnosis capabilities.

Design/methodology/approach

A human health monitoring system includes disposable customized flexible electrode array and a compact signal transmission-processing electronic unit.

Findings

Patterned rGO (reduced-graphene oxide) layers can replace traditional metal electrodes for the fabrication of free-standing all solid film sensors to provide improved flexibility, sensitivity, selectivity, and stability in ion concentration monitoring. Electrochemical measurements show the open circuit potential of current selective electrodes exhibit near Nernst responses versus Na+ and K+ ion concentration in sweat. These signals show great stability during a typical measurement period of 3 weeks. Sensor performances evaluated through real time measurements on human subjects show strong correlations between subject activity and sweating levels, confirming high degree of robustness, sensitivity, reliability and practicality of current sensor systems.

Originality/value

In improving flexibility, stability and interfacial coherency of chemical sensor arrays, rGO films have been the developed as a high-performance alternative to conventional electrode with significant cost and processing complexity reduction. rGO supported solid state electrode arrays have been found to have linear potential response versus ion concentration, suitable for electrochemical sensing applications. Current sweat sensor system has a high degree of integration, including electrode arrays, signal processing circuits, and data visualization interfaces.

Details

Sensor Review, vol. 42 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 23 January 2019

Ting Xue and Huiqi Liu

The development of Big Data and online searching engine provides a good opportunity for studying petition in China. This study has constructed a set of indices for…

Abstract

Purpose

The development of Big Data and online searching engine provides a good opportunity for studying petition in China. This study has constructed a set of indices for predicting petitions in China by using online searching engines and further explored the predicting role of economic, environment and public life risk perception in various petitions.

Design/methodology/approach

Based on the study of Xue and Liu (2017), this research first re-classified offline petition by human and cluster analysis in terms of social risk perception and built online searching indices of the two sets of petition by using data from “Google Trend” and “Baidu Index.” Second, it analyzed the predicting effect of social risk perception on online searching indices of petition by using Granger causality analysis. Finally, this study integrated the results and selected significant paths from social risk perception to the two sets of petition.

Findings

The study found that the re-classification made by human was more appropriate than the categories made by cluster analysis in terms of social risk perception. For the two sets of petition, the correlations between offline petition and Baidu Index of petition were both more significant than that of Google index. Moreover, economic and finance and resource and environment risk perception had a significant predicting effect on more than one kind of online searching indices of petition.

Originality/value

The results have demonstrated the important role of economic issues in China on predicting petitions of the economic kind, as well as other kinds. They have also reflected the dominant social contradictions and their relationship in modern China.

Details

Information Discovery and Delivery, vol. 47 no. 3
Type: Research Article
ISSN: 2398-6247

Keywords

Article
Publication date: 13 December 2021

Xueting Zhang, Tanya (Ya) Tang, Man Chen and Feng Wang

This research explores whether, when and why employee identity salience influences content sharing of employee's friends in social networks and further investigates two…

Abstract

Purpose

This research explores whether, when and why employee identity salience influences content sharing of employee's friends in social networks and further investigates two moderating conditions of network overlap and deal content.

Design/methodology/approach

In Study 1, the authors analyzed a field data related to 20,715 users on the largest social network platform in China. In Studies 2 and 3, the authors verified the findings of Study 1 and tested the underlying mechanism with two experiments.

Findings

The results showed that employee identity salience could increase sharing likelihood of content receiver, especially when the employee had higher network overlap with receiver. However, when the content contained deal-related information, the receiver was less likely to share this content from employee with salient identity. The authors also found that perceived information credibility acted as a mediator in above relationships.

Originality/value

This research is the first to test the effects of employee identity salience on content sharing by considering both content type and network characteristics. The authors also provide insights into the mediating role of information credibility, which enriches the content sharing and social network literature.

Details

Marketing Intelligence & Planning, vol. 40 no. 1
Type: Research Article
ISSN: 0263-4503

Keywords

Article
Publication date: 5 September 2016

Ying Xie, Ze Wang, Xueting Shan and Yangyang Li

Thermal stress of the rotor in a squirrel cage induction motor is generated due to the temperature rise, and the structure of the rotor will be destroyed if the stress…

Abstract

Purpose

Thermal stress of the rotor in a squirrel cage induction motor is generated due to the temperature rise, and the structure of the rotor will be destroyed if the stress acted on the rotor exceeds its limits, so the thermal stress is also one of the main causes led to broken bar fault. The purpose of this paper is to report the thermal stress coupled analysis for the induction motor with healthy and faulty rotor, and to find the variation tendency of the temperature and thermal stress due to broken bars, and the part most likely to break in the rotor as a result of the thermal stress load are identified.

Design/methodology/approach

The steady temperature and thermal stress of the rotor in the case of the healthy and faulty conditions are calculated by finite element method, and the 3D model of the motor used in the experiments is established and the experimental results are presented for both healthy and faulty machines.

Findings

The influence of the broken bars fault on the motor thermal profile and thermal stress can be found, and it explains why the breaking point always appears in the joint of the bars and end rings.

Originality/value

The paper presents the 3D thermal stress coupled model and performance characteristics of induction motor with broken bars. The reasonable constraint is established according to the contact of components each other, and more reasonable fracture location is selected. The results obtained by the simulation model are in a good agreement with practical situation, because the effect of skewed rotor were taken into consideration in the process of simulation.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 35 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Open Access
Article
Publication date: 29 July 2021

Alei Fan, Hubert B. Van Hoof, Xueting Dou and Ana Lucia Serrano

Drawing on the dual process theory and the cultural dimension of power distance, the current research investigates the impact of a specific service clue—the linguistic…

Abstract

Purpose

Drawing on the dual process theory and the cultural dimension of power distance, the current research investigates the impact of a specific service clue—the linguistic style of address forms (salutation) in hotel manager letters to guests—on customer satisfaction in a hotel context in Ecuador.

Design/methodology/approach

Following an experimental design research approach, this research conducted a series of two studies to examine how customers' cultural values (high vs low power distance), linguistic style of address forms (formal vs casual) and service valence (service success vs service failure) together influenced customer satisfaction. Specifically, Study 1 examined the service success condition, and Study 2 investigated the service failure condition.

Findings

The research results show that, in the service success condition, customers follow their distinct cultural orientations (high vs low power distance) when responding to the different linguistic styles (formal vs casual). On the other hand, in the service failure situation, as customers desire for expressions of respect that can be reflected in a formal address form, the level of satisfaction is lower when the casual address form is used in guest communications, regardless of customers' cultural orientations in power distance.

Originality/value

This research adds to existing cross-cultural service research, particularly in terms of service valence, and provides practical implications for enhancing service providers' cultural awareness and sociolinguistic competence to effectively communicate with customers from diverse cultural backgrounds.

Details

International Hospitality Review, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2516-8142

Keywords

Article
Publication date: 19 June 2021

Jean Paul Simon

This paper aims to shed some light on the history of the Chinese videogames industry, to document the growth of the leading companies and reveal how they have been…

Abstract

Purpose

This paper aims to shed some light on the history of the Chinese videogames industry, to document the growth of the leading companies and reveal how they have been morphing into platforms delivering constellations of apps and digital content (audiovisual, films, music, literature, video streaming […]). The paper tracks the development of digital services through the prism of videogames thereby showing how this industry emerged out of the deployment of the internet.

Design/methodology/approach

The paper provides an overview and a synthesis of what is known about the Chinese game industry, particularly based on consultancy documents and publications from firms. The paper is based on desk research, a review of literature and trade press and the analysis of the annual reports of the leading players (NetEase, Tencent […]).

Findings

The rise of videogames and the creation of specific company’s “ecosystems” illustrate the capacity of the industry to innovate and its significance for the Chinese economy. It reveals that gaming has been a cornerstone of many Chinese technology companies. The (young) companies came up with the innovative business models (FTP, virtual items) that were required to further expand the market. They found new ways to interact with their customers through communities and various tools.

Research limitations/implications

The paper relies on consultancy documents and publications from firms on heterogeneous data from industry and consultants. This approach comes with some limitations from a methodological viewpoint. It allows documenting the historical trends and describing the industrial landscape but not to qualify the relationships among players. Besides, the use of these sources leads to a greater focus on business models and a more limited one on the policy dimension. The latter is often perceived only through the glasses of the companies.

Practical implications

The data provided are meant to be useful to become familiar with the Chinese games industry.

Social implications

The paper indicates that the online game industry is a complex web of activities with tensions and contradictions between stakeholders (industry, government and consumers). In the case of China, there is a conflict between the willingness to liberalize the economy and the will to maintain an ideological monopoly through cultural industries.

Originality/value

Little research has been devoted to the role of videogames in emerging economies, to its specific features and to the relationships with the media industry and the information and communications technology sector. The contribution of this “digital native” to the production and distribution of digital content remains less studied. The paper provides an up-to-date overview of the Chinese case.

Details

Digital Policy, Regulation and Governance, vol. 23 no. 2
Type: Research Article
ISSN: 2398-5038

Keywords

Article
Publication date: 8 February 2016

Xueting Jiang, Hector R. Flores, Ronrapee Leelawong and Charles C. Manz

Based on extant literature on empowerment and team management, this paper aims to examine the effect of power distance and collectivism on the relationship between…

6200

Abstract

Purpose

Based on extant literature on empowerment and team management, this paper aims to examine the effect of power distance and collectivism on the relationship between empowerment and team performance through the mechanisms of knowledge sharing and intra-group conflict.

Design/methodology/approach

This paper conceptualizes a model depicting the relationship between team empowerment and team performance across cultures.

Findings

The authors argue that team empowerment can increase both knowledge sharing and intra-group conflict in working teams. Knowledge sharing facilitates team performance, while intra-group conflict impairs team performance in the long run. Team empowerment yields different team performance across cultures due to the respective moderating effects of power distance and collectivism.

Originality/value

This paper explicates the moderating roles of power distance and collectivism on the relationship between empowerment, knowledge sharing, intra-group conflict and team performance. The authors suggest that the effectiveness of team empowerment is contingent on the cultural context that the team operates in.

Details

International Journal of Conflict Management, vol. 27 no. 1
Type: Research Article
ISSN: 1044-4068

Keywords

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