نتایج جستجو برای: mega city
تعداد نتایج: 161485 فیلتر نتایج به سال:
Even today the remarkable culture of the Kotoko city-states, located south of Lake Chad, impresses visitors. According to oral traditions collected by anthropologists, the founders of the city-states were the Sao from whom the Kotoko claim to descend.1 Archaeologists discovered that the beginning of settlement in the southern Chad Basin was linked to Mega Chad’s desiccation and dated this retre...
This paper focuses on the contribution of mega events onto the development of a green economy at the event host location and discusses how to measure it. The promises of organizers usually are very ambitious but the question remains as to how realistic these claims are. This question will be addressed in three sections by using methods that are primarily analytical and critical rather than an e...
Mega cities in South Asia are an epitome of traffic snarls and resulting vehicular pollution. Dhaka, a center of polity and economy in Bangladesh, is no exception. This study is focused on the measurement of air pollution levels at traffic congestion and road in Dhaka City. The aim of this paper is to discuss the vehicle engine emissions and the technologies and methodologies available to help ...
Concurrent tropospheric O 3 and CO vertical profiles from the Tropospheric Emission Spectrometer (TES) during the MILAGRO/INTEX-B aircraft campaigns over the Mexico City Metropolitan Area (MCMA) allow us to characterize mega-city pollution. Outflow from the MCMA occurred predominantly at 600–800 hPa, evident in O 3 , CO, and NO x 5 enhancements in the in situ observations. We examined O 3 , CO,...
We present the first space-based microlens parallax measurement of an isolated star. From the striking differences in the lightcurve as seen from Earth and from Spitzer (~1 AU to the west), we infer a projected velocity ~ ṽ 250 km s hel 1, which strongly favors a lens in the Galactic Disk with mass = M M 0.23 0.07 and distance = D 3.1 0.4 kpc L . An ensemble of such measurements drawn fro...
Those who have been charmed by the ambience of life in an Asian city probably felt its evocative and at times palpable connection with past traditions and history and enjoyed the sociability of its street life. They might wonder how one could sustain and even replicate the sense of place and the quality of life one experiences in such a city. The Disappearing Asian City shows that such cities f...
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