Instanton Distribution in Quenched and Full QCD
  In order to optimize cooling as a technique to study the instanton content of the QCD vacuum, we have studied the effects of alternative algorithms, improved actions and boundary conditions on the evolution of single instantons and instanton anti-instanton pairs. Using these results, we have extracted and compared the instanton content of quenched and full QCD. 
R.C. Brower (Boston U), T.L. Ivanenko (MIT), J.W.Negele (MIT),   K.N.Orginos (Brown U.)