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[quote user="schlimm"] <blockquote> <div><img src="/TRCCS/Themes/trc/images/icon-quote.gif" /> Bucyrus:</div> <div></div> According to the NTSB report, working irregular schedules causes sleep disorders including the inability to stay awake at times.  It this settled science?  Or is it agenda-driven junk science?  </blockquote> <a href="http://my.clevelandclinic.org/disorders/Sleep_Disorders/hic_Shift_Work_Sleep_Disorder.aspx">http://my.clevelandclinic.org/disorders/Sleep_Disorders/hic_Shift_Work_Sleep_Disorder.aspx</a> If you read this short link from the Cleveland Clinic, a highly-rated medical center, I think you will discover that Shift Work Sleep Disorder is an accepted diagnosis.  It relates to disruptions in the normal Circadian rhythm.   Your all-or-nothing reasoning to a conclusion about what should be done in consequence is a nice example of a fallacious form of the argument known as reductio ad absurdum. Read the clinic's guidelines for decreasing the effects of SWSD. <div style="clear:both;"></div> [/quote] The reductio absurdum is only to highlight the profound significance of sleep disorder theories on irregular shift work.  I realize that there are shades of gray where some different people will react differently, but the shades of gray can obscure the one earth-shattering conclusion.  That is, when you clear away all of the shades of gray, you have the following possibility affecting everyone unless proven otherwise:  <o:p></o:p> People working irregular shifts, even when fully rested each day, are subject to unanticipated sudden fatigue sufficient to force the abrupt onset of sleep even while performing tasks so dangerous that falling asleep would be life threatening to themselves or others.   <o:p></o:p> The NTSB does not seem to have much problem with shades of gray when they come right out and declare that the Iowa crash was caused by the crew working irregular shifts.  <o:p></o:p> But then they do temper their advice on diagnosing sleep disorders with this cautionary note:  <o:p></o:p> “Because biomathematical models of fatigue are relatively new to the railroad industry, the use of this technology should be evaluated for its effectiveness within the context of railroads' fatigue management plans through independent scientific peer review.”
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