ISR11 Relevance Feedback in an Information Retrieval System chapter W. Riddle T. Horwitz R. Dietz Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. v'-46 Initial Results After Results First Update Rank Name Rank Name 2 3O6PROGRESS 1 306FROG,RESS 22 5041s RELEVA 15 ll04T[OCRerr] IBM 24 II04THE IBM 39 505TI[OCRerr] PLACE 4[OCRerr] 5l8EDUCATION 4[OCRerr] 1OOIDESIGN 0 49 505T1E PLACE 46 518EDUCATION 51 lOODESIGN 0 50 504is RELEVA Results After Results After Second Update Third Update Rank Name Rank Name 1 1l04T:[OCRerr]E IBM 1 11[OCRerr][OCRerr]THE IBM 2 3O6PROGRESS 2 3O6PROGRESS 46 5oi;[OCRerr]lIS RELEVA 4[OCRerr] 5[OCRerr]IS RELEVA 63 lOOIDESIGN 0 63 l0011)ESIGN 0 64 5lSEDUCATION 66 5l8EDUCATION 69 SOSTHE PLACE 69 SOSTHE PLACE Query [OCRerr]A13EVALU Cosine Correlation Function Increasing Alpha Strategy (a) Typical Results of [OCRerr]uery Modification Using Relevance Feedback Information Sho[OCRerr][OCRerr]ng the Shifting of the Ranks of the Relevant Documents Shifting of Oueries in N-Space Due to Query Modification Using Relevance Feedback Information Figure 8