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A health risk assessment study conducted in 1994 for the Greater Cairo (GC) area evaluated the environmental health risks to Cairo residents and determined the major health hazards of ambient lead and particulate matter. In order to determine the spatial and temporal trends in the concentration of these substances, the Egyptian environmental affairs agency (EEAA) decided to initiate a pollutant monitoring program. This was conducted with the help of the USA and Denmark. Numerous monitoring sites were established in Egypt. These sites monitored ambient particulate matter (PM 10 and PM 2.5 ) and lead through the Cairo air improvement project (CAIP) funded by USAID. In addition, measurements of SO 2 , NO 2 , CO, and O 3 were performed through the Egyptian information and monitoring program (EIMP) funded by DANIDA. This paper describes the ambient particulate matter and lead levels over a period from 1998 through 2007 for the all monitoring sites in GC. In addition, discussions of the sources of the observed pollutants are presented.

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The paper presents an adiabatic analysis of misaligned journal bearings. The misalignment is allowed to vary in magnitude as well as in direction with respect to the bearing boundaries. Results are obtained for the case of a fixed journal axis with a bearing length to diameter ratio of unity. It is concluded that thermal effects are more pronounced for misaligned journal bearings