Here, two dimensional Nb2C quantum dots with green fluorescence were fabricated for the first time with a quantum yield (QY) of up to 19%, the highest reported for Nb2C dots so far with good photostability and pH stability.
AimThe main objective of this study was to explore the patterns of road traffi c crashes (RTCs) among drivers in Qatar and examine the contributing factors involved with road traffi c crashes. Design This is a cross sectional survey. Methods The study based on 1228 drivers. Face to face interview was conducted by well-trained research assistants based on a questionnaire covering socio-demographic information, driving history, type of vehicle, driver behaviour, details of crashes and accident pattern. Results The study revealed that 26.6% of the studied Qatari drivers were involved in RTCs. 69.4% of the drivers with history of RTCs were men. Drivers in the age group 25-34 years were involved with higher risk of having crash (31.2%). Drivers of car (45.6%), 4WD/SUV (23.5%) were more affected by the RTCs. 23.5% of drivers who had crashes were not always using seat belt while driving. Less than half of the drivers were engaged in eating and drinking (37.9%) and using mobile phone (41.9%) while driving. More than half of the drivers were involved in traffi c violation (57.2%) with exceeding speed limit (25.7%). Overturn skid (17.7%), angle collision (14.3%) and rear end hit (10.7%) were the most frequently reported patterns of RTC. Conclusion The study fi ndings revealed the high risk of RTCs among drivers. Among the socio-demographic factors, men and young drivers of age group 25-34 years found to have a higher accident involvement.on 10 May 2018 by guest. Protected by copyright.
This study determines the characteristics of Road Traffic Injuries (RTIs) among Qatari drivers and examines the human behavioural and environmental risk factors associated in occurrence of RTIs. This cross sectional survey was conducted in the primary health care centers during the period of February – July 2009. A random sample of 1800 Qatari drivers was approached and 1406 drivers responded and agreed to participate in this study (78.1%). Face to face interview was conducted by well trained research assistants based on a questionnaire. The study revealed that of the studied Qatari drivers (1406), 14.5% of them were injured. Young drivers in the age group (25 – 34) years were more involved in RTIs (35.8%). The RTIs occurred more among male drivers than females with the ratio 1.7:1 (p
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