To explore the relationship between rear-end crash risk and its influencing factors, on-road experiments were conducted for measuring the individual vehicle trajectory data associated with novice and experienced drive...To explore the relationship between rear-end crash risk and its influencing factors, on-road experiments were conducted for measuring the individual vehicle trajectory data associated with novice and experienced drivers. The rear-end crash potential probability based on the time to collision was proposed to represent the interpretation of rear-end crash risk.One-way analysis of variance was applied to compare the rearend crash risks for novice and experienced drivers. The rearend crash risk models for novice and experienced drivers were respectively developed to identify the effects of contributing factors on the driver rear-end crash risk. Also, the cumulative residual method was used to examine the goodness-of-fit of models. The results show that there is a significant difference in rear-end risk between the novice and experienced drivers.For the novice drivers, three risk factors including the traffic volume, the number of lanes and gender are found to significantly impact on the rear-end crash risk, while significant impact factors for experienced drivers are the vehicle speed and traffic volume. The rear-end crash risk models perform well based on the existing limited data samples.展开更多
Background: Regular physical activity(PA) has documented effects in prevention and treatment of many non-communicable diseases(NCDs).Physical inactivity is recognized as the fourth leading risk factor for premature de...Background: Regular physical activity(PA) has documented effects in prevention and treatment of many non-communicable diseases(NCDs).Physical inactivity is recognized as the fourth leading risk factor for premature death, worldwide. Despite these facts, physical inactivity is increasing,not only in high-income, but also in middle-and low-income countries. To address this negative trend, evidence-based methods to increase PA are needed. The purpose of this paper is to describe the implementation and assessment of 4 strategies designed to increase PA in Vietnam.Methods: Four strategies were used: i) introduction and evaluation of an education and training program on the Swedish method of Physical Activity on Prescription(PAP) among health care professionals, ii) translation of the PAP evidence-based handbook, Physical Activity in the Prevention and Treatment of Disease(called FYSS in Swedish) into Vietnamese, iii) launch of a mass-media campaign to promote PA, and iv)advocacy to support development of PA guidelines in Vietnam.Results: The evaluation indicated that the participating health care professionals had a positive attitude to PAP. However, they also reported uncertainty in prescribing PA. FYSS was translated and disseminated successfully to health care professionals. A mass-media campaign identified the beneficial effects of PA to health care professionals, journalists, policy makers, and the public. Last, the process of developing national guidelines on PA was initiated.Conclusion: This project led to enhanced awareness and appreciation of PA in the prevention and treatment of NCDs among health care professionals as well as initiation of national PA guidelines. Important lessons also were learned in the presentation of PAP, which will be considered when designing similar projects in the future.展开更多
基金The National Natural Science Foundation of China(No.51478110)
文摘To explore the relationship between rear-end crash risk and its influencing factors, on-road experiments were conducted for measuring the individual vehicle trajectory data associated with novice and experienced drivers. The rear-end crash potential probability based on the time to collision was proposed to represent the interpretation of rear-end crash risk.One-way analysis of variance was applied to compare the rearend crash risks for novice and experienced drivers. The rearend crash risk models for novice and experienced drivers were respectively developed to identify the effects of contributing factors on the driver rear-end crash risk. Also, the cumulative residual method was used to examine the goodness-of-fit of models. The results show that there is a significant difference in rear-end risk between the novice and experienced drivers.For the novice drivers, three risk factors including the traffic volume, the number of lanes and gender are found to significantly impact on the rear-end crash risk, while significant impact factors for experienced drivers are the vehicle speed and traffic volume. The rear-end crash risk models perform well based on the existing limited data samples.
基金funded by the Swedish International Development Cooperation Agency (Sida), Department for Development Partnership (No. AKT-2010-045)
文摘Background: Regular physical activity(PA) has documented effects in prevention and treatment of many non-communicable diseases(NCDs).Physical inactivity is recognized as the fourth leading risk factor for premature death, worldwide. Despite these facts, physical inactivity is increasing,not only in high-income, but also in middle-and low-income countries. To address this negative trend, evidence-based methods to increase PA are needed. The purpose of this paper is to describe the implementation and assessment of 4 strategies designed to increase PA in Vietnam.Methods: Four strategies were used: i) introduction and evaluation of an education and training program on the Swedish method of Physical Activity on Prescription(PAP) among health care professionals, ii) translation of the PAP evidence-based handbook, Physical Activity in the Prevention and Treatment of Disease(called FYSS in Swedish) into Vietnamese, iii) launch of a mass-media campaign to promote PA, and iv)advocacy to support development of PA guidelines in Vietnam.Results: The evaluation indicated that the participating health care professionals had a positive attitude to PAP. However, they also reported uncertainty in prescribing PA. FYSS was translated and disseminated successfully to health care professionals. A mass-media campaign identified the beneficial effects of PA to health care professionals, journalists, policy makers, and the public. Last, the process of developing national guidelines on PA was initiated.Conclusion: This project led to enhanced awareness and appreciation of PA in the prevention and treatment of NCDs among health care professionals as well as initiation of national PA guidelines. Important lessons also were learned in the presentation of PAP, which will be considered when designing similar projects in the future.
