Abstract
Purpose
The purpose of this study is to present a numerical model for scratched tilting-pad bearings (STPBs) with nonuniform grids. In addition, the model is used to reveal the effects of the structural parameters of bearings on the dynamic characteristics of STPBs under impact loading.
Design/methodology/approach
By combining the Reynolds equation, the flow balance equation and the assumption of adiabatic bearings and shafts, a thermo-hydrodynamic model with nonuniform grids of scratched journal bearings was built. Describing the motion of the shaft using the Euler method and introducing the pad-tilting-angle modification equation, a dynamic model of STPBs was established.
Findings
The occurrence of scratches in tilting-pad bearings yields great sensitivity to impact loading. Less width-to-diameter ratio and larger clearance ratio reduce the minimum film thickness and enlarge the maximum film pressure, which may lead to bearing collision or abrasion. Moreover, STPBs with larger clearance ratios take longer to recover from impact loading.
Originality/value
This work is original and a valuable reference for the analysis of the dynamic characteristics of STPBs. The effects of other factors on the dynamic characteristics of STPBs can be further investigated based on this model.
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Dayong Dong and Keke Wu
The purpose of this paper is to empirically examine whether investor attention is a significant risk pricing factor.
Abstract
Purpose
The purpose of this paper is to empirically examine whether investor attention is a significant risk pricing factor.
Design/methodology/approach
Using investor attention data from Eastmoney.com, which provides for each stock the number of investors whose watch list includes that stock on a daily basis, this paper constructs a “heat” factor based on the change in investor attention and a “market exposure” factor based on the proportion of attention on a given stock over the attention to all stocks. Using the Fama−MacBeth two-step regression and a rolling analysis, this study examines the ability of the investor attention factor to explain market returns.
Findings
The empirical results show that there exists a risk premium for the “heat” factor and “market exposure” factor that is significantly different from zero. This finding shows that investor attention can systematically influence stock returns, making it a significant risk pricing factor.
Practical implications
This paper’s research on the risk pricing factors of investor attention can help investors to rationally build investment portfolios, avoid risks and form a sound investment concept, which will further reveal the information recognition mechanism of the capital market and standardize the information disclosure behavior of listed companies.
Originality/value
This paper provides evidence that investor attention is a risk pricing factor for the stock market. There are “heat” factors and “market exposure” factors in the Chinese stock market that significantly affect the purchasing behavior of individual investors.
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Yanglei Jia, Keke Zheng, Xinglong Liu and Xiang Guo
The highly competitive atmosphere of the short video platforms has increased their similarity, while users possess remarkably diverse preferences, complicating the improvement of…
Abstract
Purpose
The highly competitive atmosphere of the short video platforms has increased their similarity, while users possess remarkably diverse preferences, complicating the improvement of user stickiness. To address this issue, this research investigates the effects of different factors, including perceived usefulness, ease, enjoyment, interactivity, and social influence, on user stickiness.
Design/methodology/approach
To estimate these effects, it employs partial least square-structural equation modeling (PLS-SEM), technology acceptance model (TAM3) and theory of planned behavior (TPB) to analyze data collected from a questionnaire distributed among online users between July 20, 2023 and October 28, 2023.
Findings
The results indicate that all the studied factors have positive and significant effects on user stickiness. In addition, they confirmed the considerable effect of flow experience on the relationships between these factors and user stickiness, particularly in interactivity.
Originality/value
These findings show the short video platforms how to manage different factors effectively in stickiness to increase their uniqueness among competitors, attracting and keeping different users by covering their diverse preferences.
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Emmanuel Eze, Rob Gleasure and Ciara Heavin
The implementation of mobile health (mHealth) in developing countries seems to be stuck in a pattern of successive pilot studies that struggle for mainstream implementation. This…
Abstract
Purpose
The implementation of mobile health (mHealth) in developing countries seems to be stuck in a pattern of successive pilot studies that struggle for mainstream implementation. This study addresses the research question: what existing health-related structures, properties and practices are presented by rural areas of developing countries that might inhibit the implementation of mHealth initiatives?
Design/methodology/approach
This study was conducted using a socio-material approach, based on an exploratory case study in West Africa. Interviews and participant observation were used to gather data. A thematic analysis identified important social and material agencies, practices and imbrications which may limit the effectiveness of mHealth apps in the region.
Findings
Findings show that, while urban healthcare is highly structured, best practice-led, rural healthcare relies on peer-based knowledge sharing, and community support. This has implications for the enacted materiality of mobile technologies. While urban actors see mHealth as a tool for automation and the enforcement of responsible healthcare best practice, rural actors see mHealth as a tool for greater interconnectivity and independent, decentralised care.
Research limitations/implications
This study has two significant limitations. First, the study focussed on a region where technology-enabled guideline-driven treatment is the main mHealth concern. Second, consistent with the exploratory nature of this study, the qualitative methodology and the single-case design, the study makes no claim to statistical generalisability.
Originality/value
To the authors' knowledge, this is the first study to adopt a socio-material view that considers existing structures and practices that may influence the widespread adoption and assimilation of a new mHealth app. This helps identify contextual challenges that are limiting the potential of mHealth to improve outcomes in rural areas of developing countries.
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Bwsrang Basumatary, Mayank Yuvaraj, Nitesh Kumar Verma and Manoj Kumar Verma
Adopting and implementing robotic technology applications in the library is a significant technological up-gradation today. The purpose of this study was to evaluate selected…
Abstract
Purpose
Adopting and implementing robotic technology applications in the library is a significant technological up-gradation today. The purpose of this study was to evaluate selected literature focused mainly on robotics technology applications in the field of libraries and to assess the online social attention to research publications.
Design/methodology/approach
The study employed Scientometric and altmetric tools to evaluate the research publications. The bibliographic data of research publications were downloaded from Scopus database and scrutinized one by one and 71 articles were selected which mainly focused on robotic technology in libraries. Altmetric data were collected from the Dimensions.ai database. The analysis was performed using MS Excel, Tableau, Biblioshiny, VOSviewer and SPSS software.
Findings
Research on robotic technology in the field of libraries has been experiencing a gradual increase, marked by an annual growth rate of 12.93%. The United States has prominently led the way as the most active participant and collaborator in this advancement. Among the various journals, Library Hi Tech has notably stood out as a significant contributor to this field. However, the research articles have garnered limited social attention and impact. Furthermore, the patterns of authorship collaboration have demonstrated relatively modest levels within the field, and a weak correlation has been observed between the social attention received and the Scopus citation metrics of the publications.
Practical implications
The research needs to be disseminated more through various social media platforms to increase its visibility. Sharing research information through social media can bridge the gap between academia and society. The findings of this study can serve as a valuable reference for researchers and policymakers.
Originality/value
This study presents a Scientometric analysis of the selected published literature on robotics technology applications in the field of libraries, highlighting the progress and development of worldwide research in this area.
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This paper illustrates how Taiwan has tried to mobilize its prehistory Austronesian linguistic heritage and indigenous cultural memories to reposition itself in the Asia-Pacific…
Abstract
Purpose
This paper illustrates how Taiwan has tried to mobilize its prehistory Austronesian linguistic heritage and indigenous cultural memories to reposition itself in the Asia-Pacific. It examines how the attempt has gradually evolved into cross-border exchange and partnership based on the interconnectivity across the Pacific on different levels.
Design/methodology/approach
The research is based on policy review of the Taiwan government's growing focus on indigenous culture in strategizing diplomacy and cultural policy from 2000 through 2021 and the researcher's participant observation in expert cultural heritage meetings (2018–2021). It is also complemented by semi-structured interviews with both selected state actors and civil actors.
Findings
The past connection among indigenous communities in Taiwan and the Austronesian peoples contributes to building up new cultural circuits across-borders based upon shared indigenous heritage and demonstrates the extraterritorial role of heritage, which can be the potential base for developing diplomacy.
Research limitations/implications
The research is limited in not directly engaging with actors in the Pacific given limited time, budget and mobility under the coronavirus disease (COVID) pandemic. The author would like to follow on that in her future research.
Originality/value
The paper sheds light on the uneasy relationship between indigenous heritage making and nation building and its cultural implications. This study demonstrates that the state framework of heritage is not necessarily appropriate to deal with these complicated historical matters, especially when the notion of heritage per se is not decolonised in a settler state.