▁▁▁▁▁▁▁▁ ▁Rad om es . org ▁Detroit ▁ ▁Air ▁Def ense ▁S ector ▁ ▁Category : 1 9 5 7 ▁establish ments ▁in ▁Michigan ▁Category : A ir ▁defense ▁se ctors ▁of ▁the ▁United ▁States ▁Air ▁Force ▁Category : Mil it ary ▁units ▁and ▁form ations ▁established ▁in ▁ 1 9 5 7 ▁Category : Mil it ary ▁units ▁and ▁form ations ▁in ▁Michigan ▁Category : 1 9 6 6 ▁dis est ab lish ments ▁in ▁Michigan <0x0A> </s> ▁Simon ▁Patrick ▁Ke efe ▁( born ▁ 2 4 ▁December ▁ 1 9 6 8 ) ▁is ▁a ▁music ologist , ▁author , ▁and ▁Moz art ▁expert . ▁He ▁was ▁educated ▁at ▁the ▁University ▁of ▁Cambridge , ▁Boston ▁University ▁and ▁Columbia ▁University . ▁After ▁being ▁awarded ▁his ▁Ph D ▁in ▁ 1 9 9 7 , ▁he ▁was ▁appointed ▁to ▁a ▁lect ures hip ▁at ▁Christ ▁Church , ▁Oxford , ▁and ▁then ▁lect ured ▁at ▁Queen ' s ▁University ▁B elf ast ▁in ▁ 1 9 9 9 . ▁In ▁ 2 0 0 3 , ▁he ▁took ▁up ▁a ▁post ▁at ▁City , ▁University ▁of ▁London , ▁where ▁he ▁became ▁a ▁professor ▁of ▁music . ▁In ▁ 2 0 0 8 , ▁he ▁was ▁appointed ▁to ▁the ▁James ▁Ross iter ▁Ho yle ▁Chair ▁of ▁Music ▁at ▁the ▁University ▁of ▁She ff ield . ▁ ▁Ke efe ▁special ises ▁in ▁Moz art , ▁and ▁is ▁the ▁only ▁British ▁member ▁of ▁the ▁Sal zburg - based ▁Akademie ▁für ▁Moz art - For sch ung ▁of