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This paper aims to investigate the lubrication regime in spherical pump, especially under different structural parameters and operational conditions.

A ball-on-plane configuration is adopted to represent the contact model between spherical piston and cylinder cover. The governing equations, which include the Reynolds and elasticity equations, are solved and validated by Jin–Dowson model. Both minimum film thickness and lambda ratio (ratio of minimum fluid film thickness to combined surface roughness of the piston and cylinder cover) of the equivalent model are obtained using an established model.

The results indicate that piston diameter and radial clearance are the two main factors affecting the pump lubrication regime. Other related parameters such as rotation speed of the piston, load, viscosity of working medium, material matching and surface roughness of piston and cylinder cover also have different impacts on the lubrication regime of the spherical pump.

These results emphasize the importance of the design and manufacturing parameters on the tribological performance of spherical pumps and these are also helpful in improving the spherical pump lubrication regime and enlarging its life cycle. This is to certify that to the best of the authors’ knowledge, the content of this manuscript is their own work. This manuscript has only been submitted to this journal and never been published elsewhere. The authors certify that the intellectual content of this manuscript is the product of their own work and that all the assistance received in preparing this manuscript and sources has been acknowledged.

The purpose of this paper is to formulate and solve a last-mile distribution plan problem with concern for the quality of fruits and vegetables in cold chains.

The vehicle routing problem with time windows (VRPTW) is extended based on the characteristics of fruit-and-vegetable cold chains. The properties of multiple perishable foods, continuing decline in quality, various requirements for quality levels and optimal temperature settings during vehicle transportation are considered in the VRPTW. The product quality level is defined by the estimation of residual shelf life, which changes with temperature, and is characterized by a stepped decrease during the transportation process as time goes on. A genetic algorithm (GA) is adapted to solve the problem because of its convincing ability to solve VRPTW-related problems. For this purpose, solution encoding, a fitness function and evolution operators are designed to deal with the complicated problem herein.

A distribution plan including required fleet size, vehicle routing sequence and what quality level should be shipped out to account for the quality degradation during vehicle transportation is generated. The results indicate that the fulfillment of various requirements of different customers for various fruits and vegetables and quality levels can be ensured with cost considerations.

This study presents a problem for last-mile delivery of fresh fruits and vegetables which considers multiple practical scenarios not studied previously. A solution algorithm based on a GA is developed to address this problem. The proposed model is easily applied to other types of perishable products.

The impact of smartphone use at tourist destinations on the relationship of travel companions and trip satisfaction remains unclear. This study considers differences in relational outcomes arising from smartphone use to kill time and reduce boredom during leisure travel with different companions, either family or friends, and uses the Riva's emotion regulation model to examine whether such smartphone use provides immediate relief from ostracism.

Partial least square (PLS) method and PLS multigroup analysis were used to analyze the data collected from 205 Taiwanese tourists (104 respondents vacationing with friends and 101 respondents with family).

This study found no negative effect of smartphone use to kill time and reduce boredom on relationship satisfaction and overall trip satisfaction. Smartphone use is rather limited as a contributor to trip satisfaction, and the effect of smartphone use depends on who the tourists are traveling with. The results reflect the effect of the established position of smartphones in everyday life, extending to tourism. The use of smartphones to kill time and avoid boredom is not a sufficiently “active” activity to serve as an effective immediate response to ostracism.

This study contributes to the continuing debate on the impact of new technologies on social relations. Although past studies have examined the relational outcomes of smartphone use, few have investigated this subject in the context of different travel companions. Using Riva's emotion regulation model, this study considers smartphone use as a possible response to ostracism.

The reason that the ten‐year reform has encountered difficulties is not that there are mistakes in the overall target to develop a commodity economic system, but that the decision makers cannot understand properly the nature and structure of the commodity economic system and its market mechanism. They take it for granted that a highly efficient market mechanism will be formed if we practise “letting the enterprises make their own business operation decisions and share the profits with the government” on the basis of the original highly centralised product economic system, and they always try to combine the two incompatible systems of product economy and commodity economy. The radical reason that these two systems cannot be combined is that their ownership‐profit structures are mutually incompatible. The economic targets of the government, the enterprises, and the individual workers must be rectified.

This paper is a study of the current trends and conditions of electronic resources for Chinese studies, based on a recent survey on the Internet of 29 Chinese libraries in North America and eight Chinese libraries in China, Taiwan and Hong Kong. The survey discussed current electronic resources for Chinese studies, with a union list of major Chinese language databases currently used in libraries in Asia and the US. Current views on the use and development of electronic resources for Chinese studies were summarised.

Electronic word of mouth (eWOM) is a considerably influential factor for consumers to search for product information. Nowadays, consumers can easily post visual information (e.g. pictures or videos) to convey product information and consumption‐related experiences. Yet, prior eWOM studies focused primarily on the verbal information of eWOM. Few studies have paid sufficient attention to the effects of visual information in eWOM communication. The purpose of this paper, therefore, is to employ blogs to investigate the effects of visual information on consumers' perception of eWOM message quality, credibility, product interest, and purchase intention.

The authors conducted two empirical studies in the field of different product categories. Data were collected from subjects ranged in age from 16 to 50 (n=155 for study 1, n=309 for study 2), and analyzed using independent‐samples t test and univariate analysis of variance (ANOVA).

Results show that subjects rated eWOM articles in blogs with visual information significantly higher in four areas than identical articles without visual information. Furthermore, there is an interaction effect between product category and visual information on product interest and purchase intention. Compared with experience products, when subjects read the eWOM information of search products with pictures (versus without pictures), they would generate greater product interest and purchase intention. In addition, the effect of visual information is stronger not only for search products (no matter whether utilitarian or hedonic products) but also for experience‐hedonic products than for experience‐utilitarian products.

The findings of this study provide useful knowledge for internet marketers to develop effective eWOM marketing and thus increase consumer trust in eWOM and intention to purchase products. Although visual information is found to be important, different product categories should take advantage of visual information in different degrees.

The purpose of this paper is to appraise methodological rigor in the application of discriminant analysis (DA) in export-focused research and to offer guidelines for future studies.

The sample includes 89 empirical peer-reviewed studies, comprising 102 models published over the period 1979-2014. Content analysis and vote counting are used to evaluate each of these studies.

This review highlights major flaws in the application of DA in export research. The shortcomings are self-evident particularly concerning suitability of DA for research context, completeness in the reporting of descriptive results, and validity and reliability of predictive results.

The study takes the position that the lack of methodological rigor may be undermining the eminence of knowledge in exporting, and this has extensive implications for both researchers and practitioners.

This review outlines steps to assess methodological rigor associated with DA and offers guidelines for scholars seeking to enhance rigor in future research.

The number of smartphone users has increased with the maturity of mobile networks, which has not only led to a new lifestyle but has also facilitated the development of mobile application services. Smartphones are regarded as essential communication devices. Currently, diverse groups of people are considering using mobile payment services. Thus, the motives for using mobile payment as well as individual motives for continuing usage are of great research interest. The purpose of this paper is to examine the behavioral motivations underlying individual intentions to continue using mobile payment.

To explore the factors affecting the intention to use mobile payment services, this study constructed a theoretical framework based on cost-benefit theory that also considers social influences to form an integrated research model that explains the intentions of individuals to use mobile payment services. Online questionnaires were used to evaluate individuals with experience using mobile payment services. A total of 302 questionnaires were collected. Structural equation modeling was employed to assess the relationships among factors included in the research model.

Perceived value, social norms and social self-image played crucial roles in the intention to use mobile payment services. Furthermore, perceived benefits (relative advantage and service compatibility) and perceived costs (security risks and perceived fees) determined users’ perceived value. Social self-image positively affected users’ perceived value; in the context of a mobile-oriented information system, the ability of a mobile payment service to satisfy a user’s demands with respect to social self-image influenced the user’s perceived value of using such services.

This study contributes to a theoretical understanding of factors that explain users’ intention to use mobile payment services.

Virtual reality (VR) offers unprecedented immersion and interactivity in education, and working and learning from home have become the norm during the COVID-19 pandemic. This study empirically investigated the factors affecting the use of a VR online learning system (VROLS).

To explore factors affecting users’ continuance behavioral intentions toward using VROLSs, a research framework was formed comprising factors that constitute benefits (i.e. pull factors) and costs (i.e. push factors); these factors included perceived value, flow and social influence. The data for this study were collected via online survey questionnaires. A total of 307 valid responses were used to examine the hypotheses in the research model, employing structural equation modeling (SEM) techniques.

Perceived value, flow experience and the number of peers using VR primarily affect the decision to adopt a VROLS. The pull factors of spatial presence, entertainment and service compatibility, along with the push factors of complexity and visual fatigue, affect perceived value. Therefore, we conclude that perceived value is a primary factor positively influencing both flow experience and the decision to adopt the service.

This study contributes to a theoretical understanding of factors that explain users’ intention to use VROLSs.

The purpose of this paper is to develop a research model examining users’ perceived needs-technology fit of mobile communication software through motivational needs and technological characteristics. The study investigated the effects of perceived needs-technology fit on user satisfaction and intention to continue using mobile communication software.

This study proposes a research model based on task-technology fit theory and uses and gratification theory, incorporating key determinants of users’ continuance intention toward mobile communication software. An online survey instrument was developed to collect data, and 403 questionnaires were used to test the relationships in the proposed model.

The causal model was validated using AMOS 21.0, and all nine study hypotheses were supported. The results indicated that users’ perceived needs-technology fit and satisfaction were crucial antecedents of their intention to continue using mobile communication software and that they mediated the influence of users’ needs as well as technological characteristics.

Mobile communication software practitioners should focus on enhancing users’ perceived needs-technology fit through motivational needs (utilitarian, hedonic, and social needs) and technological characteristics (mobile convenience, service compatibility, and user control) to further boost user satisfaction and intention to continue using mobile communication software services.

This study contributes to a theoretical understanding of factors explaining users’ continuance intention toward mobile communication software.