Fuel for thought. A better measure of exposure to jet fuel shows that some military personnel may be at increased risk for adverse health effects from breathing noxious fumes. In this issue, Steve Wing, an associate professor of epidemiology in the School of Public Health at the University of North Carolina at Chapel Hill, and colleagues investigate environmental injustice in North Carolina's s...

suggested a figure of 60 — that a chart of their activities would be as unappealingly complicated as a chart of intermediary metabolism. His prediction of the number of motor proteins has turned out to be disturbingly accurate (how did he do it?), though the charts have remained appealing. The significance of all this is that there are movements within cells, and motors responsible for them, th...

If your irrigation system is not performing as efficiently as you would like then it may be time to consider updating. This can be done by renewing sprinklers, installing a more advanced control panel, renewing that worn out pump — or a complete redesign of the whole system using modern technology. If you already have Weather-matic equipment installed, Prime offers a full repair and maintenance...

With XML and XML Schema widely acknowledged as the de facto standard for data exchange and interoperability between remote applications, the need for checking integrity and adequacy of XML documents, also by means of automated tools, increases. In this perspective, this paper addresses two objectives: we provide a classification and a short overview of the diverse existing approaches for the te...