ISR10 Scientific Report No. ISR-10 Information Storage and Retrieval Document Retrieval Systems - OPtimization and Evaluation thesis page Joseph John Rocchio Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. ¼ DOCUME[OCRerr] IIE[OCRerr]IEVAL SYSTEMS - OP[OCRerr]IMIZATIO[OCRerr] M[OCRerr] EVALUA[OCRerr]IO[OCRerr] ¼; A thesis presente& by Joseph John [OCRerr]occhio, Jr. to The Division o[OCRerr] En[OCRerr]neerin[OCRerr] an& Applie& Physics in partial fulfillment of the requirements for the [OCRerr]egree of Doctor of Philosophy in the sub[OCRerr]ect of Applied Mathematics Rarvard University Cambrid[OCRerr]e, Massachusetts March 1966