Fossil Groundwater from the Middle East” I his comment to the paper “High Naturally Occurring Radioactivity in Fossil Groundwater from the Middle East” Dababneh argues that due to its current water crisis Jordan has no option but to allow the use of the Disi aquifer water in spite of the high annual radiation dose levels relative to the World Health Organization (WHO) guidelines. While we recog...

One of the key determinants of China's ability to continue its economic growth into the 21 st century and to distribute the benefits of that growth to a broad spectrum of the population will be the further development of its railroad system. This paper examines the possibilities for improving the performance and increasing the capacity of China's railroad system through the introduction of comp...