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排序方式: 共有197条查询结果,搜索用时 15 毫秒
191.
Using a driving simulator to identify older drivers at inflated risk of motor vehicle crashes 总被引:4,自引:0,他引:4
PROBLEM: To develop appropriate assessment criteria to measure the performance of older drivers using an interactive PC-based driving simulator, and to determine which measures were associated with the occurrence of motor-vehicle crash. METHOD: One hundred and twenty-nine older drivers residing in a metropolitan city volunteered to participate in this retrospective cohort study. Using the driving simulator, appropriate driving tasks were devised to test the older drivers, whose performances were assessed by 10 reliable assessment criteria. Logistic regression analysis was then undertaken to determine those criteria that influence the self-reported crash outcome. RESULTS: As expected, driving skill of older drivers was found to decline with age. Over 60% of the sample participants reported having at least one motor-vehicle crash during the past year. Adjusting for age in a logistic regression analysis, the cognitive abilities associated with the crash occurrence were working memory, decision making under pressure of time, and confidence in driving at high speed. SUMMARY: The findings of this retrospective study indicated those individuals at inflated risk of vehicle crashes could be identified using the PC-based interactive driving simulator. Prospective studies need to be undertaken to determine whether the driving simulator can predict future crash events. IMPACT ON INDUSTRY: This study demonstrated an economical driving simulator approach to screen out problematic or unsafe older drivers before a more detailed but expensive road test is considered. 相似文献
192.
Don Huisingh 《生态毒理学报》2003,25(3):48-51
清洁生产原则的积极推广,有赖于政府、工业界和"推动组织"(例如金融和教育机构、非政府组织、技术指导人员和咨询人员、工业协会)间有效合作伙伴关系的推动与发展.本文引证了推动组织参与的一些成功行动.迫切希望不同的利益相关者在推动社会向可持续性发展转化中,发挥更积极的作用. 相似文献
193.
Tapping the leakages: Methane losses, mitigation options and policy issues for Russian long distance gas transmission pipelines 总被引:1,自引:0,他引:1
Stefan Lechtenbhmer Carmen Dienst Manfred Fischedick Thomas Hanke Roger Fernandez Don Robinson Ravi Kantamaneni Brian Gillis 《International Journal of Greenhouse Gas Control》2007,1(4):387-395
The Russian natural gas industry is the world's largest producer and transporter of natural gas. This paper aims to characterize the methane emissions from Russian natural gas transmission operations, to explain projects to reduce these emissions, and to characterize the role of emissions reduction within the context of current GHG policy. It draws on the most recent independent measurements at all parts of the Russian long distance transport system made by the Wuppertal Institute in 2003 and combines these results with the findings from the US Natural Gas STAR Program on GHG mitigation options and economics.With this background the paper concludes that the methane emissions from the Russian natural gas long distance network are approximately 0.6% of the natural gas delivered. Mitigating these emissions can create new revenue streams for the operator in the form of reduced costs, increased gas throughput and sales, and earned carbon credits. Specific emissions sources that have cost-effective mitigation solutions are also opportunities for outside investment for the Joint Implementation Kyoto Protocol flexibility mechanism or other carbon markets. 相似文献
194.
Don M. Soule Claude M. Vaughan 《Journal of the American Water Resources Association》1973,9(5):918-922
ABSTRACT: Measuring flood control benefits from estimated property damage in prior floods omits losses in the form of depressed values of land put to less valuable uses because of annual flooding. Covariance analysis of real property values in three urban areas differently situated around Lake Cumberland, Kentucky shows a much larger rate of increase, over a 15-year period, for the area receiving flood protection. This suggests that the economic benefits from a flood protection facility include these additional property value increases as well as the prevented property damage. 相似文献
195.
Don C. Erman 《Environmental management》1981,5(6):531-536
General surveys of the benthic macroinvertebrates from Piceance Creek and the White River were conducted for nearly a decade prior to oil-shale exploitation in north central Colorado, USA. Comparison of the taxa collected in four studies on Piceance Creek and five studies on the White River shows little similarity among most studies. Studies were generally consistent in methods, site selection, and time of year for collection. Lack of agreement among the studies on what constitutes a baseline of common taxa is probably a result of taxonomic difficulties and differences in technique. More emphasis should be placed on testing possible impacts than on repeated, expensive, and inconclusive baseline inventories. 相似文献
196.
Contributions of biofilm and suspended sludge to nitrogen transformation and
nitrous oxide emission in hybrid sequencing batch system 总被引:2,自引:0,他引:2
Ingwei Wayne Lo Kwang Victor Lo Don S Mavini Dean Shiskowski William Ramey 《环境科学学报(英文版)》2010,22(7):953-960
Hybrid system combines the nature of suspended growth and attached growth has been widely applied to wastewater treatment.
In this research, the contributions to N transformation and N2O emission by biofilm and suspended sludge in the hybrid sequencingbatch
reactor for a simultaneous nitrification, denitrification and phosphorus removal process were investigated. For the hybrid system,
nitrification occurred mostly in the suspended sludge, while the biofilm played the major role in denitrification. The interaction of
the biofilm and the suspended sludge in the same reactor resulted in a better overall nitrogen removal performance with simultaneous
nitrification and denitrification. However, N2O emission was the main end product of nitrogen removal for the hybrid system; while
it was N2 for the biofilm. The relative low N2O emissions from the pure biofilm and the pure suspended sludge corresponded to the
relatively high nitrate at the end of the aeration period compared with the hybrid system. 相似文献
197.
Senavirathna Mudalige Don Hiranya Jayasanka Zhaozhi Liu Fujino Takeshi 《Environmental science and pollution research international》2022,29(23):34475-34485
Environmental Science and Pollution Research - Microplastics are one of the most widely discussed environmental issues worldwide. Several studies have shown the effect of microplastic exposure on... 相似文献