## Glossary and Nomenclature \begin{tabular}{l l}
3D-CFD & three dimensional computational fluid dynamics \\ ACIS & Advanced Corona Ignition System \\ AFR & air-fuel ratio \\ aSOD & after the start of discharge \\ BCKavg & average background frame \\ CAD & crank angle degree \\ CCV & cycle-to-cycle variability \\ CMOS & complementary metal-oxide semiconductor \\ CoV & coefficient of variation \\ ET & energizing time \\ ECU & engine control unit \\ EGR & exhaust gas recirculation \\ FM & Federal Mogul Powertrain Italy, a Tenneco Group Company \\ fps & frames per second \\ FS & full scale \\ GDI & gasoline direct injection \\ IMEP & indicated mean effective pressure \\ IT & ignition timing \\ LTP & low-temperature plasma \\ MBT & maximum brake torque \\ MFB & mass fraction burned \\ MON & motor octane number \\ P & streamer penetration for a certain frame \\ Pmax & maximum streamer penetration referred to a discharge \\ PFI & port fuel injection \\ RF & radio-frequency \\ RON & research octane number \\ SI & spark ignition \\ Td & corona discharge duration \\ Vd & driving voltage \\ \(\lambda\) & relative air-fuel ratio \\ \(\theta_{50}\) & crank angle of mass fraction burned = 50\% \\ \end{tabular}   
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