Photos by Ashlee Wilcox / Documentary Associates
The key to knowledge is asking the right questions. At AIHce EXP 2017, which was held at the Washington State Convention Center in Seattle June 4–8, presenters and speakers helped attendees identify many of the pressing questions that shape their profession, their careers, and even their own natures. Below are just a few of the questions that confronted attendees in Seattle. WHY BOTHER KNOWING THINGS? Thirteen years to the week after his first appearance on the popular American game show Jeopardy!, Ken Jennings, best known for his 74-game Jeopardy! winning streak, presented “Life in the Form of a Question” to a standing-room-only crowd of industrial hygienists and OEHS professionals. Jennings wove anecdotes about his time on Jeopardy! into an engaging talk that demonstrated how “knowing lots of weird stuff” has greater value than just increasing the odds of winning a game show.
A common argument against knowing things, Jennings said, is that the Internet allows easy access to knowledge. But he worries about becoming reliant on computers and smartphones.
“What happens if we outsource all of our memory to our little glowing rectangles?” he asked. “Some stuff has to be in your mind, or modernity doesn’t work.”
The Search for Knowledge at AIHce EXP 2017
Any Questions?
Disadvantages of being unacclimatized:
  • Readily show signs of heat stress when exposed to hot environments.
  • Difficulty replacing all of the water lost in sweat.
  • Failure to replace the water lost will slow or prevent acclimatization.
Benefits of acclimatization:
  • Increased sweating efficiency (earlier onset of sweating, greater sweat production, and reduced electrolyte loss in sweat).
  • Stabilization of the circulation.
  • Work is performed with lower core temperature and heart rate.
  • Increased skin blood flow at a given core temperature.
Acclimatization plan:
  • Gradually increase exposure time in hot environmental conditions over a period of 7 to 14 days.
  • For new workers, the schedule should be no more than 20% of the usual duration of work in the hot environment on day 1 and a no more than 20% increase on each additional day.
  • For workers who have had previous experience with the job, the acclimatization regimen should be no more than 50% of the usual duration of work in the hot environment on day 1, 60% on day 2, 80% on day 3, and 100% on day 4.
  • The time required for non–physically fit individuals to develop acclimatization is about 50% greater than for the physically fit.
Level of acclimatization:
  • Relative to the initial level of physical fitness and the total heat stress experienced by the individual.
Maintaining acclimatization:
  • Can be maintained for a few days of non-heat exposure.
  • Absence from work in the heat for a week or more results in a significant loss in the beneficial adaptations leading to an increase likelihood of acute dehydration, illness, or fatigue.
  • Can be regained in 2 to 3 days upon return to a hot job.
  • Appears to be better maintained by those who are physically fit.
  • Seasonal shifts in temperatures may result in difficulties.
  • Working in hot, humid environments provides adaptive benefits that also apply in hot, desert environments, and vice versa.
  • Air conditioning will not affect acclimatization.
Acclimatization in Workers