Classification
ETFD - Solid oxide fuel cells ( SOFC )
70
E
63
EISF - Thin film solar cells
60
UMB - Atmospheric chemistry
56
ETFG - Polymer electrolyte membrane fuel cells ( PEMFC )
48
ETF - Fuel cells - general
39
CNWK - Electric batteries
36
ESB - Hydrogen energy
36
CWSW - Membrane separation process
34
U
34
GNA - Geology - soil sciences
32
UXS - Radioactive waste management
32
UMC - Atmospheric physics
28
URA - Soil chemistry
28
FNM - High temperature materials, high temperature properties
23
FGK - Thin film technology, epitaxy
22
FPU - Corrosion protection, surface coating
22
FPUG - Special purpose coatings
20
EIS - Solar cells
19
CNW - Electrochemical energy production and conversion
18
FGN - Nanotechnology
18
GTAP - Hydrological investigation methods
18
PGN - Fusion technology, plasma devices
18
TKJ - Traffic
18
UHK - Traffic and environment - incl. automobile exhaust gas
18
UMNL - Environmental aerosols
18
FNP - Ceramics - specific materials
17
UMGE - Carbon capture and storage (CCS)
17
LWH - Agriculture - soil sciences
16
PGK - Fusion plasmas, fusion research
16
UMV - Climatic change
16
CLPS - Organic colloids, membranes
15
EBA - Energy production, energy technology
15
ETFP - Fuel cell construction and modeling
15
FNT - Powder technology
15
TKF - Power plants
15
UMN - Air pollution control and measurement
15
FHAB - Surface and thin film characterization
14
GSC - Remote sensing
14
UMNC - Air pollution control by chemical analytical methods
14
EVP - Energy models, energy system analysis
13
PGNB - Fusion reactor materials
13
EVN - Energy supply - future aspects
12
UMD - Atmospheric models
11
CMDS - Photochemical processes in nature and technology
10
EHA - Renewable energy sources
10
FMTG - High temperature alloys
10
FNV - Composite materials, fiber materials
10
THS - Turbines, pumps
10
TNL - Nuclear fuel, nuclear fuel elements - general
10
more ...