▁science , ▁technology ▁or ▁development ▁of ▁electric ▁prop ulsion . ▁ ▁The ▁St uh ling er ▁Medal ▁was ▁established ▁by ▁the ▁ER PS ▁in ▁ 2 0 0 5 ▁as ▁the ▁" Med al ▁for ▁Out standing ▁Ach iev ement ▁in ▁Electric ▁Prop ulsion ", ▁then ▁renamed ▁after ▁its ▁first ▁recip ient ▁Ernst ▁St uh ling er ▁( 1 9 1 3 – 2 0 0 8 ), ▁the ▁German - born ▁American ▁ro cket ▁scient ist , ▁shortly ▁after ▁his ▁death ▁in ▁ 2 0 0 8 . ▁The ▁medal ▁is ▁typically ▁awarded ▁every ▁two ▁years ▁during ▁the ▁ER PS ' s ▁main ▁conference , ▁the ▁International ▁Electric ▁Prop ulsion ▁Conference . ▁ ▁Re cip ients ▁ ▁See ▁also ▁▁ ▁List ▁of ▁engineering ▁awards ▁ ▁References ▁ ▁Category : E lect rical ▁engineering ▁awards <0x0A> </s> ▁George ▁Cl if ton ▁( 1 8 2 3 – 1 9 1 3 ) ▁was ▁an ▁English ▁collect or ▁of ▁sea we ed ▁spec im ens , ▁active ▁in ▁Australia . ▁ ▁Cl if ton ▁was ▁born ▁in ▁England ▁and ▁served ▁in ▁its ▁Royal ▁Navy , ▁he ▁em igr ated ▁to ▁Australia ▁in ▁ 1 8 5 1 . ▁He ▁returned ▁in ▁ 1 8 6 4 , ▁having ▁served ▁as ▁a ▁police ▁officer , ▁to ▁become ▁the ▁Governor ▁of ▁the ▁Port land ▁and ▁D art mo or ▁pr isons . ▁▁ ▁He ▁was ▁employed ▁by ▁the ▁state ▁of ▁Western ▁Australia ▁as ▁super int endent ▁of ▁water ▁police ▁at ▁F rem ant le . ▁Cl