▁that ▁time , ▁Jacob ▁D ruck man ▁( who ▁was ▁one ▁of ▁America ' s ▁most ▁influ ential ▁compos ers ) ▁was ▁chair ▁of ▁the ▁composition ▁department ▁at ▁Y ale ▁and ▁composer ▁in ▁residence ▁with ▁the ▁New ▁York ▁Phil harm onic . ▁ ▁D augh ert y ▁studied ▁with ▁D ruck man ▁and ▁other ▁Pul itzer ▁Prize ▁winning ▁compos ers ▁at ▁Y ale , ▁including ▁Bernard ▁R ands ▁and ▁Roger ▁Reyn olds . ▁ ▁He ▁also ▁studied ▁impro vis ational ▁notation ▁systems ▁and ▁open ▁form ▁with ▁experimental ▁music ▁composer ▁Ear le ▁Brown . ▁ ▁D augh ert y ' s ▁composition ▁class ▁at ▁Y ale ▁included ▁student ▁compos ers ▁who ▁would ▁later ▁become ▁unique ▁and ▁important ▁voices ▁in ▁contemporary ▁music : ▁Bang ▁on ▁a ▁Can ▁compos ers ▁Michael ▁Gordon , ▁David ▁Lang , ▁and ▁Julia ▁Wol fe ; ▁along ▁with ▁Robert ▁Be aser , ▁A aron ▁Jay ▁K ern is , ▁Scott ▁Lind ro th , ▁and ▁Betty ▁Oliver o . ▁ ▁At ▁Y ale , ▁D augh ert y ▁wrote ▁his ▁dis sert ation ▁on ▁the ▁relationship ▁between ▁the ▁music ▁of ▁Charles ▁I ves ▁and ▁Gustav ▁Mah ler ▁and ▁the ▁writ ings ▁of ▁Go ethe ▁and ▁Ralph ▁Wal do ▁Em erson . ▁ ▁He ▁worked ▁closely ▁on ▁this ▁dis sert ation ▁with ▁John ▁Kirk pat rick , ▁who ▁was ▁the ▁cur ator ▁of ▁the ▁I ves ▁Collection ▁at ▁Y ale ▁and ▁gave ▁the ▁ 1 9 3 8 ▁premi ere ▁of ▁I ves ’ ▁P iano ▁Son ata ▁No . ▁ 2