This document discusses human factors related to heat stress. It covers topics like information input and processing, cognitive systems modeling, energy expenditures during rest and physical activity, heat stresses, and heat-related disorders and their health effects. Specific points covered include the definition of information in information theory, basal and resting metabolic rates and their relationship to total energy expenditure and body size, average daily calorie needs for males and females, and factors that influence heat disorders like clothing, prior injury, and common heat-related illnesses like heat stroke, exhaustion, and rashes.