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This paper aims to study the wear properties of electron beam melted Ti6Al4V (EBM-Ti6Al4V) in simulated body fluids for orthopedic implant biomedical applications compared with wrought Ti6Al4V (Wr-Ti6Al4V).

Wear properties of EBM-Ti6Al4V compared with Wr-Ti6Al4V against ZrO₂ and Al₂O₃ have been investigated under dry friction and the 25 Wt.% newborn calf serum (NCS) lubricated condition using a ball-on-disc apparatus reciprocating motion. The microstructure, composition and hardness of the samples were characterized using scanning electron microscopy (SEM), x-ray diffraction and a hardness tester, respectively. The contact angles with 25 Wt.% NCS were measured by a contact angle apparatus. The wear parameters, wear 2D and 3D morphology were obtained using a 3D white light interferometer and SEM.

EBM-Ti6Al4V yields a higher contact angle than the Wr-Ti6Al4V with the 25 Wt.% NCS. EBM-Ti6Al4V couplings exhibit lower coefficients of friction compared with the Wr-Ti6Al4V couplings under both conditions. There is only a slight difference in the wear resistance between the Wr-Ti6Al4V and EBM-Ti6Al4V alloys. Both Wr-Ti6Al4V and EBM-Ti6Al4V suffer from similar friction and wear mechanisms, i.e. adhesive and abrasive wear in dry friction, while abrasive wear under the NCS condition. The wear depth and wear volume of the ZrO₂ couplings are lower than those of the Al₂O₃ couplings under both conditions.

This paper helps to establish baseline bio-tribological data of additively manufactured Ti6Al4V by electron beam melting in simulated body fluids for orthopedic applications, which will promote the application of additive manufacturing in producing the orthopedic implant.

The overall aim of this study is to improve our understanding of the strength of attraction factors of professional football club brands with foreign fans, and of the influence of demographics and individual characteristics on the influence of these factors in the context of sport spectatorship services.

This research was based on a quantitative study surveying 1,160 Chinese fans of English Premier League clubs and its results were produced through exploratory and confirmatory factor analyses. They identify the relative importance of 21 organisation– (e.g. star players, charismatic managers, team kits, partnerships and alliances, etc.), market and environment– (e.g. peer influence, TV coverage, etc.), and experience– (e.g. personal bonds, past attendance, etc.) induced service brand attraction points that were categorised into six main factors: star players, on-the-field performance, brand identity, marketing and merchandising, localism and experience.

Organisation-induced factors are the most important club brand attraction factors for Chinese fans. ANOVA analysis showed that demographic (i.e. gender, age, and education) and individual (i.e. brand identification and loyalty levels) characteristics influence the importance of attraction factors for fans. For instance, fans who had previously supported a different club brand rated the marketing and merchandising dimensions lower, localism higher, on-the-field performance lower and brand identity lower than those who had always supported the same club.

These results emphasise the importance of segmentation when considering consumer attraction to professional sport brands. They also provide specific practical knowledge that is useful when expanding into new foreign markets.

This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies.

This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context.

Identification of influential attraction points can help European soccer clubs to exploit soaring interest among football supporters in China. Such points can enable teams to differentiate themselves from rival brands and consider various demographic and individual factors in order to target different fan segments.

The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

The paper examines the key driving factors behind the rapid and uneven growth of social enterprises in China based on Kerlin’s Macro-Institutional Social Enterprise (MISE) model of social enterprise development, with an emphasis on testing key local institutional factors.

The study adopts the quantitative method approach. The hypotheses have been tested based on a cross-regional empirical analysis with two national datasets on China.

This study shows that among the state, market and civil society, local government support in terms of favorable policies is the sole determinant factor driving China’s social enterprise growth. On the other hand, the market is irrelevant and local civil society impedes social enterprise growth. This demonstrates that the current growth model is the result of government intervention.

The datasets have a limited sample size. We suggest that future studies may collect a larger sample size with more comprehensive information. We think this study will encourage more comparative qualitative studies at the local level to reveal the underlying mechanisms of growth.

Since government policy is the determinant factor, the quality and quantity of government-backed incubation programs and platforms would matter the most for social enterprise growth. Our study also helps social entrepreneurs understand what factors matter when they try to develop social enterprises in China. They are advised to work on aspects of gaining legal legitimacy and political support in order to grow the sector.

This conclusion suggests that professionals and practitioners should review the implications of the current growth of social enterprises in China, in terms of their sustainability, given their institutional isolation from other sectors.

Current studies have yet to thoroughly explore the role of meso- and micro-institutional factors in social enterprise development, especially in different contexts. With reference to Kerlin’s framework and the tri-sector model, this paper advances the understanding of social enterprise growth in China.

Focusing on the supply side of peer-to-peer (P2P) accommodation service sector, this study identifies the emerging types of micro-enterprise operators in the growing Chinese market, and investigate their respective operational risks and coping strategies.

A qualitative study was adopted to explore the micro-enterprise in peer-to-peer accommodation in China. Twenty semi-structured interviews were conducted to explore the operators' behaviors in the service sector.

Based on the types of property ownership and forms of interaction, four groups of operators were identified, i.e. hospitable sharers, remote sharers, roommates and butlers. This study uncovers their operational risk factors (safety, cost, legal and social, psychological) and respective coping strategies.

Most prior studies on P2P accommodation sector are conducted from the demand side about customer behaviors. This study not only enhances the understanding of the hosts in the sharing economy by developing a novel typology of operators, but also provides insights into the operational behaviors on an individual operator perspective.

This paper aims to propose a design method for attenuating stress waves pressure using soft matrix embedded with particles.

Based on the phononic crystal theory, the particle composed of hard core and soft coating can form a spring oscillator structure. When the frequency of the wave is close to the resonance frequency of the spring oscillator, it can cause the resonance of the particle and absorb a lot of energy. In this paper, the resonant phononic crystal with three phases, namely, matrix, particle core and coating, is computationally designed to effectively mitigate the stress wave with aperiodic waveform.

The relationship between the center frequency and width of the bandgap and the geometric and physical parameters of particle core are discussed in detail, and the trend of influence is analyzed and explained by a spring oscillator model. Increasing the radius of hard core could effectively enhance the bandgap width, thus enhancing the effect of stress wave attenuation. In addition, it is found that when the wave is in the bandgap, adding viscosity into the matrix will not further enhance the stress attenuation effect, but will make the stress attenuation effect of the material worse because of the competition between viscous dissipation mechanism and resonance mechanism.

This study will provide a reference for the design of stress wave protection materials with general stress waves.

This study proposes a design method for attenuating stress waves pressure using soft matrix embedded with particles.

This paper aims to obtain the film thickness, friction torque and pumping rate and analyze the effects of roughness and surface micro-dimple texture (circular, square and equilateral triangle) on the performance of the oil seal.

On the basis of elastohydrodynamic lubrication and the pumping mechanism of rotating shaft seal, this paper establishes a numerical model of hybrid lubrication of oil seal in sealing area. The model is coupled with fluid mechanics, rough peak contact mechanics and deformation analysis.

The results show that surface texture significantly improves the lubrication properties of the oil seal. The oil seal with the square texture has the largest oil film thickness, while the equilateral triangle texture has a better effect on the pumping rate.

To get closer to the real working environment of the oil seal, based on the surface roughness, this paper studies the effect of the texture shapes applied to the oil seal lip surface on the performance of the oil seal. The critical roughness and rotational speed values with zero pumping rate are obtained, which provides a theoretical basis for the correct selection of oil seals.

The effect of playfulness climate on employees in firms has been the subject of an increasing number of studies in recent years. Given the growing number of businesses that have incorporated playfulness into their operations, it is possible to enhance the task performance and innovative performance of the younger generation of workers by rationally managing playfulness, particularly when it comes to that aspect of the workplace. Based on the conservation of resources theory, this study aims to investigate how the playfulness climate in organizations influences the change self-efficacy of the millennial workers and how to enhance their task performance and innovation performance.

The authors used a quantitative approach to test the relationship between the hypotheses. The survey population for this study consisted of the millennial workers in the computer sector who are involved in research and development in China. Hierarchical regression analysis was used to test the built mediation model empirically over the course of the study's three rounds of data collection, each separated by one month. Through the collection of paired questions for leadership and their subordinates, 424 valid questionnaires were obtained.

The examination of the questionnaire results supports the study's theoretical hypothesis, which states that when millennial workers sense a more playfulness work environment, it will encourage them to develop a sense of change self-efficacy. Additionally, they will be better able to handle work-related responsibilities and come up with innovative ideas as a result of change self-efficacy, which would eventually enhance the task performance and innovation performance of millennial employees.

By introducing the mediation of change self-efficacy, this study expands on the application of the conservation of resources theory. The research on the performance of millennial employees is complemented and enhanced by investigating the relationship between the playfulness climate and employees' task performance and innovation performance from the perspective of their sense of change self-efficacy. This study also reveals that managers should foster a positive and playfulness environment in their workplaces in order to manage the performance of millennial employees.

The purpose of this paper is to analyze and identify Chinese consumers’ behavior and preference characters toward table grapes, especially to explore the variance of consumption preference in recent five years.

Two representative China-wide questionnaire surveys were conducted by face-to-face and online questionnaire survey, respectively, in 2009 and 2014. Comparative study was adopted to dig the changes of consumers’ preferences and habits. ANOVA was adopted to explore the statistically difference among consumers’ behavior and preferences.

The results indicate that Chinese consumers are rational-motivation-driven grape consumers, they prefer to sweet taste, seedless and medium priced grapes. Safety and quality characters (clean appearance, freshness and taste) were ranked as the most important grape attributes. As a whole, it was found that consumers are more quality-focussed and safety-conscious five years later, so some variances was showed in their purchase habits and preferences, such as the choice of purchase place, attitude to special grapes and willingness to pay to safe and genetically modified grapes.

This research not only indicates some stable preferences of Chinese consumers toward table grape, but also finds out some significant changes in consumers’ behavior before and after five years based on a comparative study in 2009 and 2014.

Although phone calls are widely used by debt collection services to persuade delinquent customers to repay, few financial services studies have analyzed the unstructured voice and text data to investigate how debt collection call strategies drive customers to repay. Moreover, extant research opens the “black box” mainly through psychological theories without hard behavioral data of customers. The purpose of our study is to address this research gap.

The authors randomly sampled 3,204 debt collection calls from a large consumer finance company in East Asia. To rule out alternative explanations for the findings, such as consumers' previous experience of being persuaded by debt collectors or repeated calls, the authors selected calls made to delinquent customers who had not been delinquent before and were being called by the company for the first time. The authors transformed the unstructured voice and textual data into structured data through automatic speech recognition (ASR), voice mining, natural language processing (NLP) and machine learning analyses.

The findings revealed that (1) both moral appeal (carrot) and social warning (stick) strategies decrease repayment time because they arouse mainly happy emotion and fear emotion, respectively; (2) the legal warning (stick) strategy backfires because of decreasing the happy emotion and triggering the anger emotion, which impedes customers' compliance; and (3) in contrast to traditional wisdom, the combination of carrot and stick fails to decrease the repayment time.

The findings provide a valuable and systematic understanding of the effect of carrot strategies, stick strategies and the combinations of them on repayment time. This study is among the first to empirically analyze the effectiveness of carrot strategies, stick strategies and their joint strategies on repayment time through unstructured vocal and textual data analysis. What's more, the previous studies open the “black box” through psychological mechanism. The authors firstly elucidate a behavioral mechanism for why consumers behave differently under varying debt collection strategies by utilizing ASR, NLP and vocal emotion analyses.