Revert "Paper"

This reverts commit 8b00ea1e16d392681d8cd3507c33c0979d8f1a1c.
2012 CIG_SF.pdf

paper for report
Revert "2012 CIG_SF.pdf"

This reverts commit 4dc87b01ba14e7fffd15109280310435a577cb0f.
2012_CIG.pdf

paper for report