S1. Energy Sources (Fossil & Renewable)S2. Energy Conversion (Heat and Mass Transfer, Combustion, Thermodynamics, Entropy & Exergy Analysis)S3. Energy and Environment. Sustainable TransitionS4. Smart Cities and Urban ManagementS5. Advanced Energy MaterialsS6. Electrical Power SystemsS7. Energy Economics and Policy (Thermo-Economics, Exergy Economics)S8. AI Applications to Energy Conversion Systems