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. 2019 Mar 27;57(6):711–720. doi: 10.2486/indhealth.2018-0216

Table 2. Explanation of the 29 different options/buttons provided on the main screen of the PHS software, as shown in Fig. 1.

# Name Description
1 Copyright Opens a new window which provides general information about the copyright of the present software.
2 Initial data & settings Opens a new window which allows the user to change the initial data and settings of the software.
3 Calculate Calculates the predicted heat strain and opens a new window which shows the calculated results.
4 Clear Clears all changes including results. By clicking the “Yes” button, all changes, including results, will be lost.
5 Save simulation Saves all variables including time periods and initial data.
6 Simulations Opens a new window which provides four options: a) import a preexisted simulation from a file; b) export the selected simulation; c) delete the selected simulation; d) load a saved simulation.
7 Number of time periods Indicates the number of different simulation phases. Each time period can have different input parameters. The maximum number of allowed time periods is 10.
8 Air temperature Represents the temperature of the air around the human body.
9 Globe temperature Measured using a black globe temperature sensor.
10 Mean Radiant temperature Describes the average radiant temperature of all the surrounding surfaces.
11 Relative humidity Describes the ratio between the partial pressure of water vapour in humid air and the water vapour saturation pressure at the same temperature and the same total pressure.
12 Vapour pressure Describes the actual amount of water in the air.
13 Air velocity Describes the wind speed.
14 Metabolic rate Describes the metabolic rate.
15 Mechanical efficiency Describes the efficiency of a task.
16 Clothing insulation Describes the thermal insulation provided by clothing.
17 Exposed time Represents the amount of time (minutes) spent on the simulated work task.
18 Reflection coefficients Describes the emissivity of the reflective clothing.
19 Covered BSA Describes the fraction of the body surface area covered by reflective clothing.
20 Stature Represents the height (cm) of the simulated individual.
21 Body mass Represents the weight (kg) of the simulated individual.
22 Walking speed Describes the walking/movement speed of the simulated individual.
23 THETA angle Describes the angle between walking direction and wind direction.
24 Posture Describes the body position of the simulated individual.
25 Acclimatized subjects Describes the acclimatization status of the simulated individual. It is important to note that a human being needs up to two weeks of daily exposure to be fully acclimatized.
26 Water consumption Describes the ability of the simulated individual to drink water freely during the exposure time.
27 Transfer the values to the next time period Enabling this option results in all values being transferred to the next time period when pressing “Next period”.
28 Previous period Moves to the previous time-period, if available.
29 Next period Moves to the next time-period, if available. If option #27 is enabled, all values will be transferred to the next time period.