They may operate computers to enter and retrieve data on patients' caloric requirements and intake, or to track financial information.
The average caloric requirement for each crew member is now 3,000 kcal, as opposed to 2,500 kcal provided for the Apollo crews.
This caloric requirement can be met with protein, fat, carbohydrates or a mixture of them.
Daily total caloric requirements were calculated from Long's equation modified for ideal body weight.
More important, the volunteers ate about half their caloric requirements for six months; most anorexics eat far less, over a much longer period of time.
Scientists have also turned their attention to cassava, which provides at least 50 percent of the caloric requirements for about half of black Africa's population.
But the official ration provides only 70 percent of caloric requirements.
More than half of Iraqi women and children are receiving less than 50 percent of their daily caloric requirements, officials say.
What happens if you have an increase in caloric requirements (due to gestation, taking up a new sport, etc.)?
The basal metabolic rate is the minimal caloric requirement needed to sustain life in a resting individual.