Fig. 2. Measured and simulated emission rate of particulate matter with a mass median diameter 10 µm (PM₁₀), 12–13 Dec. 2003 (53 pigs, average weight: 50 kg; sensor-liquid feeding). Input variables: ventilation rate, animal activity, and animal weight (mean measured/simulated: 0.75/0.89; RMSE: ± 0.34; R²: 0.772)