hello everyone

i shutted down a database for 1hour.But it doesn't work.
So i checked the alert file.show some messages belowed:

************************************
active process 1128 user 'sheffrong' program 'oracle@localhost.localdomain'
active process 1124 user 'sheffrong' program 'oracle@localhost.localdomain'
active process 1130 user 'sheffrong' program 'oracle@localhost.localdomain'
active process 29416 user 'sheffrong' program 'oracle@localhost.localdomain'
active process 8224 user 'sheffrong' program 'oracle@localhost.localdomain'
SHUTDOWN: waiting for logins to complete
************************************

Assuredly,i opened some browser to access the database by EM.
But i already closed these browsers.Is there possibility that i closed the browsers,but the processes are still alive?
please help me.

sheff

PS:sorry for the bad english