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The purpose of this study is to investigate the influence of rotational speed on the oil film stability of the hydrostatic rotary table having double rectangular oil pads. The oil film stability is evaluated based on the oil film stiffness under constant load condition and the displacement response amplitude of the oil film under disturbance load condition.

The oil film stability theoretical equations of the double rectangular oil cavity are deduced such as oil film stiffness, damping and dynamic equations. A simulation model is developed to analyze the relationship among oil film temperature, oil film pressure fields and oil film stability. The user-defined function programs are used to control the rotational speed, lubricant viscosity and oil film thickness during the simulation. In addition, an experimental rig is built to test the simulation results.

This study shows that oil film stability decreases with increasing rotational speed under constant load and disturbance load. The trend of oil film stability decreased slowly within 30 r/min, and then rapidly. However, since the hydrodynamic pressure effect, the decrease rate of stability is mitigated under constant load and high rotational speeds.

The conclusions can provide a theoretical basis for improving the oil film stability of machines with similar hydrostatic support structure.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2024-0267/

This study aims to better understand the morphological characteristics of single particle and the health risk characteristics of heavy metals in PM_2.5 in different functional areas of Handan City.

High resolution transmission electron microscopy was used to observe the aerosol samples collected from different functional areas of Handan City. The morphology and size distribution of the particles collected on hazy and clear days were compared. The health risk evaluation model was applied to evaluate the hazardous effects of particles on human health in different functional areas on hazy days.

The results show that the particulate matter in different functional areas is dominated by spherical particles in different weather conditions. In particular, the proportion of spherical particles exceeds 70% on the haze day, and the percentage of soot aggregates increases significantly on the clear day. The percentage of each type of particle in the teaching and living areas varied less under different weather conditions. Except for the industrial area, the size distribution of each type of particle in haze samples is larger than that on the clear day. Spherical particles contribute more to the small particle size segment. Soot aggregate and other shaped particles contribute more to the large size segment. The mass concentrations of hazardous elements (HEs) in PM_2.5 in different functional areas on consecutive haze pollution days were illustrated as industrial area > traffic area > living area > teaching area. Compared with the other functional areas, the teaching area had the lowest noncarcinogenic risk of HEs. The lifetime carcinogenic risk values of Cr and As elements in each functional area have exceeded residents’ threshold levels and are at high risk of carcinogenicity. Among the four functional areas, the industrial area has the highest carcinogenic and noncarcinogenic risks. But the effects of HEs on human health in the other functional areas should also be taken seriously and continuously controlled.

The significance of the study is to further understand the morphological characteristics of single particles and the health risks of heavy metals in different functional areas of Handan City. the authors hope to provide a reference for other coal-burning industrial cities to develop plans to improve air quality and human respiratory health.

This study establishes a framework of green supply chain management (GSCM) in the construction project context. The purpose is to empirically validate the effect of GSCM practices on environmental and organizational performance from the sustainability perspective and explore the distinct role of contractual and relational governance in promoting GSCM practices.

This study used survey data collected from construction companies in China, with a sample of 159 responses participating in the analysis. This study applied a survey method to test the hypothesized relationships. Partial least squares structural equation modeling (PLS-SEM) was used to test the hypothesized relationships based on the survey data in Chinese construction industry.

The results demonstrate that in construction projects, GSCM practices have a positive effect on both environmental and organizational performance. Contractual governance is not significantly related to GSCM practices, while relational governance positively influences the implementation of GSCM practices. The results further demonstrate the indirect effect of relational governance on the relationship between contractual governance and GSCM practices.

Theoretically, this study enhances the understanding of GSCM as a holistic method to integrate green practices into construction projects and reveals the distinct role of governance arrangements in greening construction supply chain, which contributes to project sustainability research. Practically, this study provides a systematic GSCM implementation framework and transformation path for the construction industry to achieve both organizational and environmental performance.

Since the “Standards + Certification” regional quality brand initiative has become a key component of China’s efforts to promote a quality-driven economy, this paper aims to examine the effect of perception, trust and satisfaction toward the regional quality brand on consumer loyalty.

Data were collected from 401 consumers who have bought “Zhejiang Manufacturing” regional quality brand products. The structural equation modeling (SEM) technique was applied to assess the relationship of the research model.

The results show that brand perception, trust and satisfaction toward regional quality brands all significantly positively impact both consumer behavioral and attitudinal loyalty. Further, the results confirmed that brand trust and satisfaction fully mediate the relationship between brand perception and behavioral loyalty and partially mediate the relationship between brand perception and attitudinal loyalty.

This study presents a conceptual model on the impact of perception toward regional quality brands on consumer loyalty in a field where little research has been done. It offers a consumer-focused analysis that advances the theoretical and empirical knowledge of regional quality brands.

This study aims to provide a timely review of hospitality and tourism live streaming (HTLS) research, aiming to understand the intellectual foundation in the past and identify opportunities for future research.

This study collected 56 papers from journals in the Social Science Citation Index database or the Australian Business Deans Council journal quality list and adopted a hybrid systematic literature review combining bibliometric analysis and the theory-context-characteristics-method framework-based approach. Additionally, a cross-tabulation analysis was conducted to compare the research on two specific forms of HTLS – tourism e-commerce live streaming (TEcLS) and travel live streaming.

The study found that the current research lacks in-depth theoretical insights, focuses on China as the national context and viewers as the research subject, mainly uses online surveys and lacks first-order knowledge. Moreover, it identified five research themes, including the impact of HTLS on viewer behavior, purchase behavior in HTLS and introduction of HTLS, within which eight categories of research constructs, such as viewer-related, streamer-related and relationship-related, are applied.

In terms of research, the study reveals various gaps in the existing literature and provides potential research directions to advance the field. As for practice, it offers valuable strategies for practitioners to optimize their marketing efforts using HTLS.

This study provides an up-to-date review of the HTLS field through a systematic and reproducible method. It offers critical discussions and suggestions for academic research and industry practices.