Classification
ETA - Energy storage
CNWK - Electric batteries
13
ETC - Energy conversion
9
CNW - Electrochemical energy production and conversion
4
ETF - Fuel cells - general
4
ESB - Hydrogen energy
3
TKJ - Traffic
3
EIA - Solar energy - general
2
EIP - Photovoltaics
2
EXA - Energy policy
2
FNPE - Nanostructured materials
2
GDA - Engineering geology - general
2
THM - Heat transfer, mass transfer - technical aspects
2
CNE - Electrochemistry
1
CNR - Electrodes
1
EHA - Renewable energy sources
1
EIC - Solar thermal energy conversion
1
EIS - Solar cells
1
EKA - Wind energy
1
EMA - Hydroelectric, tidal energy
1
ENA - Energy from biomass and waste
1
ETFD - Solid oxide fuel cells ( SOFC )
1
EUA - Energy conservation - general
1
EVP - Energy models, energy system analysis
1
FGN - Nanotechnology
1
FNPD - Hard materials, refractory compounds
1
FNPH - Ceramics for specific applications
1
FNX - Carbon, carbon materials
1
GKAB - Geothermics
1
GKK - Geophysics - applications
1
TEJ - Electric devices, mechanical devices, magnets, dielectrics
1
TNLC - Nuclear fuel cycle
1
UEF - Sustainability
1
UHCH - Urban areas
1