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Copyright of Geography & Geographic Information Science is the property of Geography & Geo-Information Science Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao is the property of Sun-Yat-Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Signalling & Communication Engineering is the property of Railway Signalling & Communication Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The post-entry operation sustainability of airline routes directly affects their profitability. This paper investigates factors influencing the operating duration of airline routes based on a survival analysis modeling method. Key factors are selected from five aspects representing characteristics in terms of cost and supply, route and airport, market structure, airline cooperation type, and time heterogeneity. The transatlantic market between Europe and the US is chosen as the empirical study due to its high degree of liberalization. The research period ranges 19 years from 2003 to 2021. First, the single factor analysis is conducted by utilizing the Kaplan-Meier method. Second, a Weibull parameter survival model is constructed to quantitatively analyze the relationship between the chosen factors and the operating duration of airline routes. The results show that：(1) The average operating duration of the EU-US routes is five years, among which routes that were continuously operated for more than 10 years account for 16%；(2) the operating duration of airline routes is significantly influenced by distance, airline’s total capacity, route structure, endpoint airports type, route competition, airline type, and region as well as alliance；(3) both independent and interaction variables representing alliance and code-share characteristics have significant impacts on route operating duration. Routes operated by Star and SkyTeam members have a longer operating duration. For airlines in the same alliance, the route-exit risks between operating carriers and marketing carriers in code-sharing cooperation are significantly different. [ABSTRACT FROM AUTHOR]

Copyright of Geomatics & Information Science of Wuhan University is the property of Geomatics & Information Science of Wuhan University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of EurAmerica is the property of EurAmerica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Malnutrition is common after stroke, usually caused by cognitive disorder, dysphagia, paralysis, sensorimotor disability and visual field defect. Many researches indicate that the initiation of early enteral nutrition in stroke patients would own enormous clinical benefits, including a decrease in the risk of death and infectious diseases, shorter hospital stay and lower health expenditure. However, irregular nutrition management could increase the incidence of hypostatic pneumonia and urinary tract infection. Therefore, both European Society for Parenteral and Enteral Nutrition (ESPEN) and American Society for Parenteral and Enteral Nutrition (ASPEN) recommended that nutrition screening and assessment and nutrition support be initiated as soon as possible, preferably within 24 h of hospital admission, to improve clinical outcomes. Chinese neurologists and patients have accepted this concept and have done many worthful studies in the past few years. This paper summarized the common methods of nutrition assessment and measurement of interstinal barrier function, in order to monitor the nutritional status of stroke patients, and push the establishment and improvement of nutrition support system for stroke patients in China. [ABSTRACT FROM AUTHOR]