In message <4caa0df84cab184eb09525a5938e5c744e98a...@cosmail02.lsi.com>, dated Mon, 28 Jul 2008, "Tang, George" <george.t...@lsi.com> writes:
>You have provided very good info. My comment is that the fields used >in the experiments are relatively weak, in the range of a few microT to >1800 microT, and the durations are relatively short (a few days). >Researchers have found that when they increase the field strength up to >100 milli-G for months up to 1 year, the results show an increase in >cancer cells growth. I think it's necessary to take into account that, like the farad, the tesla is a big unit. If we consider the field strength rather than the induction, a 'few microtesla' becomes 'a few amps/metre', and 1800 μT is 1430 A/m. These are not weak fields. Switching to CGS units is confusing. 1 T is 10 kG, so 100 mG is 1000 μT, which is not an increase relative to 1800 μT. Please cite a reference for the research, so we can see the frequency/ies concerned, and consider how likely is exposure to such a field for a year. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
