 <IMG ALIGN=MIDDLE SRC="http://www.cs.wisc.edu/condor/NEXT/ball-t.gif"> <a  HREF="http://www.cs.wisc.edu/~zhang/zhang.html"> Tian Zhang </A>  ( <a HREF="http://www.cs.wisc.edu/~zhang/birch.html"> BIRCH </A>)  </H3>
