Tingting Xu, Cuifeng Zhang and Lijun Chen
Presently, a wide range of polyurethane adhesives can be obtained using different kinds of polyols and isocyanates. However, the applied temperature of the polyurethane adhesive…
Abstract
Purpose
Presently, a wide range of polyurethane adhesives can be obtained using different kinds of polyols and isocyanates. However, the applied temperature of the polyurethane adhesive is not more than 80°C. The film of polyurethane adhesive will be softened and deformed when its applied temperature is more than 100°C. Thus, the mechanical property of the polyurethane adhesive is decreased clearly, which limits its further application. The purpose of the study is to improve the heat resistance of polyols, especially polyester polyols and its resultant polyurethane adhesives.
Design/methodology/approach
The more rigid benzene ring is introduced into the polyester polyols to improve the heat resistance of its resultant polyurethane adhesive.
Findings
The more rigid benzene ring has ben introduced into the polyester polyols and the heat resistance of its resultant polyurethane adhesive is improved.
Originality/value
The polyester polyols with more rigid benzene ring have been prepared successfully by the vacuum melting method when diethylene glycol, neopentyl glycol, 1,6-hexanediol, ethanediol, isophthalic acid, terephthalic acid, sebacic acid and adipic acid are used as raw materials and tetra-isopropyl titanate is adopted as the catalyst.
Details
Keywords
Lijun Chen, Xin Zhang, Cuifeng Zhang, Zhongbin Bao and Tingting Xu
Motivated by the globally increasing concern over environmental protection, the interest of a large part of the scientific community focuses on the development of green…
Abstract
Purpose
Motivated by the globally increasing concern over environmental protection, the interest of a large part of the scientific community focuses on the development of green surfactants aiming to replace traditional toxic surfactants-based alternatives. The purpose of this paper is to prepare acrylate copolymer latex modified with fluorine and silicone monomer, which is emulsified with the green surfactants of sodium rosinate and alkyl polyglycoside (APG).
Design/methodology/approach
A series of acrylic copolymer latexes containing fluorine–silicon have been prepared by semi-continuous seed emulsion polymerisation of mixed monomers of methyl methacrylate (MMA), butyl acrylate (BA), hexafluorobutylmethacrylate (HFMA) and vinyltriethoxysilane (VTES) and emulsified by green mixed surfactants of sodium rosinate and APG.
Findings
The optimum recipe of preparing the emulsion is as follows: the amount of emulsifiers is 6 per cent and the mass ratio of sodium rosinate to APG is 1:3. The amount of initiator is 0.4 per cent, and the amounts of the silicon monomer and fluorine monomer are 5 and 7 per cent, respectively. In comparison with the acrylate latex prepared without fluorine monomer and silicon monomer, the thermal stability and the water resistance of the film of the resultant latex clearly improved.
Practical implications
The acrylic copolymer latexes containing fluorine–silicon emulsified with green surfactants can be used in the coatings, adhesives, finishing agents and so on.
Originality/value
The acrylic copolymer latexes containing fluorine–silicon have been prepared by semi-continuous seed emulsion polymerisation. The green mixed surfactants of sodium rosinate and APG have been used as the emulsifiers to replace traditional toxic surfactants-based alternatives.
Details
Keywords
Yuhang Zhang, Chang Liu, Tingting Xu, Yan Huang and Liangyan Tao
The technical level of aircraft failure analysis plays a special role in ensuring the safety of civil aviation flight. Using appropriate methods for functional failures analysis…
Abstract
Purpose
The technical level of aircraft failure analysis plays a special role in ensuring the safety of civil aviation flight. Using appropriate methods for functional failures analysis can provide a reliable reference for aircraft safety. The purpose of this paper is to provide a new and comprehensive measure based on conventional functional hazard analysis (FHA) and grey system theory to analysis and evaluate the class that each failure belongs to.
Design/methodology/approach
This paper integrates multiple methods including the FHA, the fixed weight cluster, the Delphi method and the analytic hierarchy process (AHP). To begin with, use FHA method to sort out the corresponding failure states of a certain system from the perspective of function and determine the evaluation index. And then using group decision and AHP, determine the expert weight and index weight in the fixed weight cluster. The fixed weight cluster function is used to determine the grey class to which a certain functional failure belongs in the complex system.
Findings
In the past, the risk assessment of aircraft was mostly dominated by the subjective judgment of the experts, but it was not possible to give an objective observation score for each failure state. This paper addresses the problem efficiently as well as the feature of “little data, poor information.” The risk degree of each failure state can ultimately be replaced by a quantitative value.
Research limitations/implications
This paper uses the idea of clustering in grey system theory to evaluate the risk of landing gear system. In the expert evaluation stage, different experts evaluated the impact degree of the aircraft's failure caused by its functions, so the final risk classification is subjective to some extent.
Practical implications
This study analyzed the different conditions of the landing gear, including the front wheel steering, front wheel damping, front wheel steering system, brake system fault information and so on. It can effectively divide the different failure states and their effects, which is helpful to improve the safety of aircraft landing gear system and provide some useful methods and ideas for studying the safety of aircraft systems.
Social implications
Based on the FHA analysis process and the grey system theory, this paper determines various potential risks and their consequences of various functions according to the hierarchy, so as to carry out further detailed analysis on the risks that may occur under various functional conditions and take certain measures to prevent them. It is helpful to improve the risk management and control ability of aircraft in the actual flight process and to guarantee the safety of people's lives and property.
Originality/value
This paper is a pioneer in integrating the FHA method and the grey system theory, which exactly can be used to address the problem with the character of “little data, poor information.” The model established in this paper for the defects of FHA can effectively improve the accuracy of FHA, which is of great significance for the study of safety. In this paper, a case about landing gear system is given to illustrate the effectiveness of the model.
Details
Keywords
Yuhang Zhang, Yan Huang, Tingting Xu, Chang Liu and Liangyan Tao
The classification of aircraft failures has been a significant part of functional hazard analysis (FHA). Aiming at the shortcomings of the traditional FHA method in the evaluation…
Abstract
Purpose
The classification of aircraft failures has been a significant part of functional hazard analysis (FHA). Aiming at the shortcomings of the traditional FHA method in the evaluation of aircraft risk, the purpose of this paper is to put forward a new approach by combining the gray comprehensive relation calculation method in the gray system theory with the traditional FHA in order to deal with the problem of “little data, poor information.”
Design/methodology/approach
This paper combines FHA, 1–9-scale method and gray relation analysis. At first, aircraft failure scenarios are chosen and data from experts are collected; then gray system theory is applied to find the relevance of such scenarios. Finally, the classification according to relevance is determined.
Findings
In the past, “little data, poor information” made it difficult for researchers to implement FHA. In this paper, the authors manage to deal with the problem of “poor information” and provide an approach to find the seriousness of aircraft failure.
Research limitations/implications
Due to the use of expert-evaluating methods, the classification of failures is still a little subjective and can be improved in this area. In the future, the method can be improved from the perspective of combining FMEA to analyze more complex indicators or using multisource heterogeneous solutions to solve fuzzy numbers, probabilities, gray numbers and indicators that cannot be assigned.
Practical implications
The paper uses FHA to divide the failure state and establishes a gray evaluation model of the aircraft failure state classification to verify the relevant method. Some aircraft safety design requirements are used to check the safety hazards of the aircraft during the design process, and to provide rational recommendations for the functional design of the aircraft.
Social implications
Improving the safety of aircraft is undoubtedly of great practical significance and has become a top priority in the development of the civil aviation industry. In this paper, the FHA method and the failure state of the aircraft are studied. The original FHA method is innovated by using the gray system theory applicable to the poor information state. Therefore, to some extent, this study has significance for improving the safety of civil aircraft flight, ensuring people’s travel safety and enhancing the society’s trust in civil aviation.
Originality/value
The main innovation of this paper is integrating the FHA method and the gray system theory. This study calculates the comprehensive relation degree of each failure under different flight stages, and uses FHA to divide the failure state, and finally establishes a gray evaluation model of the aircraft failure state classification to analyze the different conditions of the landing gear brake system, so that it improves the present situation, and the problem with the character of “little data, poor information” can be addressed better.
Details
Keywords
Yumei Xu, Chaohui Wang and Tingting Zhang
This study aims to develop a measurement scale of tourism-led rural gentrification from the perspective of rural residents.
Abstract
Purpose
This study aims to develop a measurement scale of tourism-led rural gentrification from the perspective of rural residents.
Design/methodology/approach
The procedure for developing the measurement scale included a thorough review of related literature on tourism-led rural gentrification and multiple stages of qualitative and quantitative investigations. A total of 1,080 rural residents in Huzhou and Huangshan participated in the project. The semi-structured interviews and questionnaire were applied to collect the data. This study analyzed the data with the methodologies of exploratory factor analysis, confirmatory factor analysis and structural equation modeling.
Findings
The measurement scale developed in this study included seven dimensions: Accelerated Ecological Awareness, Individual Behavior, Rural Economic Development, Enhanced Living Standards, Talents and Demographic Changes, Human and Cultural Shift and Cohesive Community.
Research limitations/implications
This measurement scale was developed and validated in China and may not be relevant in other contexts. The scale focuses on tourism-led rural gentrification only from the perspective of rural residents. The findings broaden the knowledge on tourism-led rural gentrification by researching the topic from the point of view of rural residents.
Practical implications
For policymakers and tourism enterprises, this study provides a valuable index for a full understanding of tourism-led rural gentrification. For investors, the research offers insights for priority investments to advance tourism development in rural regions.
Originality/value
This study is one of the few attempts to empirically measure tourism-led rural gentrification. The results improve on the knowledge about tourism-led rural gentrification in China.
研究目的
本研究的主要目的是从居民视角开发和验证旅游引导的乡村绅士化测量量表。
研究设计和方法
开发和验证旅游引导的乡村绅士化测量量表主要包含两方面的工作:旅游引导的乡村绅士化相关文献梳理; 多阶段的定量和定性研究。本研究共邀请1080位研究对象参与调研, 并通过深度半结构访谈和调查问卷收集数据, 使用EFA、CFA和SEM等研究方法研究结果。
研究结论
本研究开发和验证的测量量表包括7个维度:文明素养感知、经济发展感知、生活水平感知、发展环境感知、社会风尚感知、人居环境感知和社区秩序感知。
研究的局限性/意义
本研究基于中国背景开发和验证了旅游引导的乡村绅士化测量量表, 未验证该量表在其他国家或地区的普适性, 且仅从居民视角展开研究。我们的研究结果丰富了旅游引导的乡村绅士化内容。
实践意义
对于政策制定者和旅游企业来说, 本研究为他们充分了解旅游引导的乡村绅士化提供了参考; 对投资者来说, 本研究为投资者投资提供了有价值的借鉴和参考。
原创性/价值
本研究是测量旅游引导的乡村绅士化的重要尝试, 丰富了对中国旅游引导的乡村绅士化的认识。
关键词:
旅游引导的乡村绅士化 居民感知 量表开发 量表验证
文章类型: 研究型论文
Motivo de investigación
El objetivo principal del presente estudio es desarrollar y validar una escala de medición de gentrificación rural impulsada por el turismo desde la perspectiva de los residentes.
Diseño y metodología de investigación
El desarrollo y la validación de la presente escala de medición consistió en dos tareas principales: un examen de la literatura relacionada con la gentrificación rural impulsada por el turismo; y múltiples etapas de investigación cuantitativa y cualitativa. Para este estudio, se invitó a un total de 1080 sujetos para participar de esta investigación, los datos se obtuvieron mediante entrevistas y cuestionarios semiestructurados en profundidad, y los resultados se han analizado mediante EFA, CFA y SEM.
Conclusiones de la investigación
La escala de medición desarrollada y validada en este estudio consta de 7 dimensiones: percepción de alfabetismo civilizacional, percepción de desarrollo económico, percepción de nivel de vida, percepción de entorno de desarrollo, percepción de costumbres sociales, percepción de asentamiento humano y percepción de orden comunitario.
Limitaciones/significado de la investigación
Este estudio desarrolló y validó la escala de medición basada en un contexto chino, pero no se pudo generalizar la escala de medición en otros países o regiones. Esta investigación solo analiza el fenómeno de gentrificación rural impulsada por el turismo desde la perspectiva de los residentes. Nuestros resultados contribuyen a mejorar el contenido de la gentrificación rural impulsada por el turismo.
Significado práctico
Para los responsables políticos y las empresas de turismo, la presente investigación constituye una referencia para que comprendan plenamente la gentrificación rural impulsada por el turismo; para los inversores, constituye una valiosa referencia de inversión.
Originalidad/Valor
Este estudio es un importante intento para medir la gentrificación rural impulsada por el turismo y contribuye a enriquecer la comprensión de la gentrificación rural impulsada por el turismo de China.
Palabras clave
Gentrificación rural impulsada por el turismo, Percepción de los residents, Desarrollo de la escala, Validación de la escala
Tipo de papel
Trabajo de investigación
Details
Keywords
Nan Hua, Bin Li and Tingting (Christina) Zhang
This paper aims to propose a hospitality and tourism live-streaming (HTLS) experience cocreation model based on a critical reflection of extant literature to capture the governing…
Abstract
Purpose
This paper aims to propose a hospitality and tourism live-streaming (HTLS) experience cocreation model based on a critical reflection of extant literature to capture the governing structure of HTLS experiences and reveal the mechanisms under which HTLS works.
Design/methodology/approach
To ensure that critical reflections and insights produced by this study are meaningful and contribute to the body of knowledge and practices, the authors have adopted a robust methodology comprising systematic searching, evaluating and conceptualizing.
Findings
A conceptual model is developed around three critical and intimately related domains of HTLS experiences: the governing framework of HTLS content cocreation based on stakeholder theory; the structural relationships between HTLS content, IT affordance and HTLS experiences; and the conceptual structure of HTLS experiences based on personal engagement theory.
Practical implications
Several practical implications follow from this study. First, it is critical to understand that both HTLS content and experience are affected by multiple stakeholders. Second, stakeholder interactions and cocreation determine consumer experiences. Third, practitioners should take advantage of the understanding of HTLS stakeholder attributes. Fourth, attention should be paid to IT affordance. And lastly, a tiered structure appears to govern consumer engagement in HTLS.
Originality/value
Live-streaming studies are still in their infancy stage in hospitality and tourism, with only nine papers related to HTLS published in peer-reviewed journals until May 2022. This study reviewed a carefully selected collection of 15 live-streaming-related articles and proposed a conceptual HTLS experience cocreation model. Moreover, the existing studies in live streaming are synthesized, with important themes identified, as well as practical and theoretical trends explored.
Details
Keywords
Yanrun Xu, Tingting Jiang, Xiao Hu and Huiyi Tian
Health short videos are serving as a powerful tool for encouraging individuals to actively adopt healthier behaviors. The sensory cues applied in these videos can be useful for…
Abstract
Purpose
Health short videos are serving as a powerful tool for encouraging individuals to actively adopt healthier behaviors. The sensory cues applied in these videos can be useful for engaging peripheral processing and enhancing attitudes. While previous research has examined the effects of various single cues, this study features a pioneering attempt to explore the roles of audiovisual cross-modal correspondence, encompassing multisensory cues perceived through different modalities, in health communication.
Design/methodology/approach
A 2 (color: warm/cool) × 2 (music tempo: fast/slow) between-subjects experiment was conducted to observe 120 participants’ responses to a health short video promoting eye health that was created using four different combinations of background color and background music tempo.
Findings
It was found that the congruent color–tempo pairings, that is blue & slow and orange & fast, led to more positive attitudes toward the videos than the incongruent pairings, that is blue & fast and orange & slow. The effect of cross-modal correspondence on attitude was fully mediated by processing fluency, with gender acting as a moderator between the two variables. Furthermore, individuals’ attitudes toward a short video positively influenced their health behavioral intentions.
Originality/value
These findings not only lend support to the theoretical framework of “multisensory cues-fluency-attitude-intention” chain for persuasion purposes but also have practical implications for creating effective health short videos.
Details
Keywords
Hongyan Dai, Yan Wen, Weihua Zhou, Tingting Tong and Xun Xu
The overuse and scarcity of resources emphasize the importance of the circular economy. The technology facilitated by Industry 4.0 stimulates the implementation of the circular…
Abstract
Purpose
The overuse and scarcity of resources emphasize the importance of the circular economy. The technology facilitated by Industry 4.0 stimulates the implementation of the circular economy that aims to reduce resource use and enhance operational efficiency. This study focuses on enhancing delivery efficiency in an online-to-offline (O2O) context from an Industry 4.0 technology-facilitated personal configuration perspective, that is, comparing in-house and crowdsourced delivery efficiency in China's O2O on-demand food delivery context.
Design/methodology/approach
The authors collect 128,152 orders from 38 restaurants of an online restaurant chain in China. The authors adopt multiple regression analysis to examine the delivery efficiency gap between in-house and crowdsourced deliverymen and the determinants of this efficiency gap.
Findings
The findings of this study reveal that crowdsourced deliverymen exhibit higher delivery efficiency, in terms of a shorter delivery time, than in-house deliverymen. In addition, the authors find that platforms providing monetary incentives or implementing late delivery penalties enlarge this efficiency gap. Furthermore, the authors show that external factors, such as working on weekends and bad weather conditions, contribute to the narrowing of this performance efficiency.
Practical implications
The study's findings suggest that platforms should use advanced technologies facilitated by Industry 4.0 to optimize their personnel configuration to enhance their delivery efficiency and reduce carbon emissions. The effective approaches include using financial incentives and improving working schedules.
Originality/value
The authors' findings contribute to the online fulfillment literature by focusing on delivery efficiency in the O2O context from the Industry 4.0 technology-facilitated personnel configuration perspective. The authors examine how internal and external factors moderate the performance efficiency between these two types of deliverymen.
Details
Keywords
Wei Xiong, Tingting Liu, Xu Zhao and Zihan Xiao
This paper explores the association between directors’ and officers’ liability insurance (D&O insurance) and management tone manipulation.
Abstract
Purpose
This paper explores the association between directors’ and officers’ liability insurance (D&O insurance) and management tone manipulation.
Design/methodology/approach
This study uses data from A-share listed non-financial companies from 2009 to 2021 as its sample for empirical tests. In addition, the study relies on text analysis and the construction of models to investigate the relationship between D&O insurance and management tone manipulation.
Findings
The authors find that the purchase of D&O insurance will lead to management tone manipulation in the “management discussion and analysis” part of companies’ annual reports, and operating risk and agent cost are the two paths for the effect. Further analysis shows that having a male CEO and employing high-quality auditors can weaken the positive impact of D&O insurance on tone manipulation.
Originality/value
This paper provides a new approach for studying the literature related to D&O insurance and management behavior, and the findings enrich our understanding of the influencing factors and the mechanism of management tone manipulation, thus revealing policy implications for further standardization of the terms and system of D&O insurance in China.
Details
Keywords
Qin Chen, Jiahua Jin, Tingting Zhang and Xiangbin Yan
The success of online health communities (OHCs) depends on maintaining long-term relationships with physicians and preventing churn. Even so, the reasons for physician churn are…
Abstract
Purpose
The success of online health communities (OHCs) depends on maintaining long-term relationships with physicians and preventing churn. Even so, the reasons for physician churn are poorly understood. In this study, an empirical model was proposed from a social influence perspective to explore the effects of online social influence and offline social influence on physician churn, as well as the moderating effect of their online returns.
Design/methodology/approach
The empirical data of 4,145 physicians from a Chinese OHC, and probit regression models were employed to verify the proposed theoretical model.
Findings
The results suggest that physicians' churn intention is influenced by online and offline social influences, and the offline social influence is more powerful. Physicians' reputational and economic returns could weaken the effect of online social influence on churn intention. However, physicians' economic returns could strengthen the effect of offline social influence on churn intention.
Originality/value
This research study is the first attempt to explore physician churn and divides the social influence into online and offline social influences according to the source of social relationship. The findings contribute to the literature on e-Health, user churn and social influence and provide management implications for OHC managers.