نتایج جستجو برای: megacity
تعداد نتایج: 901 فیلتر نتایج به سال:
STUDY OBJECTIVES To study the association between greenery filled public areas that are nearby a residence and easy to walk in and the longevity of senior citizens in a densely populated, developed megacity. DESIGN Cohort study. METHODS The authors analysed the five year survival of 3144 people born in 1903, 1908, 1913, or 1918 who consented to a follow up survey from the records of registe...
As an aspiring global city, Istanbul is at the crossroads of capital, political struggle, and socioeconomic transformation. Unfortunately, also major active fault lines. This paper analyzes earthquake risk mitigation planning for megacity since last big seismic catastrophe Marmara Earthquakes in 1999 that hit region, including Istanbul. We use concept riskscape to explore technocratic construct...
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Monitoring of benzene, toluene and xylenes (BTEX) was conducted along with traffic counts at 17 roadside sites in urban areas of HoChiMinh. Toluene was the most abundant substance, followed by p,m-xylenes, benzene, o-xylene and ethylbenzene. The maximum observed hour-average benzene concentration was 254 microg/m3. Motorcycles contributed to 91% of the traffic fleet. High correlations among BTE...
The volatilities of different chemical species in ambient aerosols are important but remain poorly characterized. The coupling of a recently developed rapid temperature-stepping thermodenuder (TD, operated in the range 54–230C) with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) during field studies in two polluted megacities has enabled the first direct characterizatio...
[1] Atmospheric column abundances of carbon dioxide (CO2), carbon monoxide (CO), methane (CH4) and nitrous oxide (N2O) have been measured above the South Coast air basin (SCB), a densely populated urban region of Southern California, USA, which includes Los Angeles and the surrounding suburbs. Large diurnal variations in CO and CH4 are observed which correlate well with those in CO2. Weaker cor...
Introduction Conclusions References
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