diff --git a/img/cleansing.png b/img/cleansing.png index 85f8640c9cf2f12ec216dfce8d7e2d2d351e37d8..e94be87b9053dcaa6456e4379871bc1d5ed1bde6 100644 Binary files a/img/cleansing.png and b/img/cleansing.png differ diff --git a/img/selection.png b/img/selection.png index 55a64e17bb87da92afb4c898708dc213ba89f40d..b2afbd4896bc3fcf818593904eb5bf3667ad478a 100644 Binary files a/img/selection.png and b/img/selection.png differ diff --git a/material/tbls.pptx b/material/tbls.pptx index 4f0a4e17d3d6513a31cf8456254c82035d142cd7..f5c40d34e5d058a4b5e61f935e55ce8095276037 100644 Binary files a/material/tbls.pptx and b/material/tbls.pptx differ diff --git a/material/viz.pptx b/material/viz.pptx index 44435b860d545f48fcb7492492cd79a1983ba85c..d5dfd06a5fa14e6c2f3983cc78922ef06493be03 100644 Binary files a/material/viz.pptx and b/material/viz.pptx differ diff --git a/material/~$tbls.pptx b/material/~$tbls.pptx deleted file mode 100644 index 05b07b1a9ed49416b9f32bea243b4d95d05914cb..0000000000000000000000000000000000000000 Binary files a/material/~$tbls.pptx and /dev/null differ diff --git a/material/~$viz.pptx b/material/~$viz.pptx deleted file mode 100644 index 05b07b1a9ed49416b9f32bea243b4d95d05914cb..0000000000000000000000000000000000000000 Binary files a/material/~$viz.pptx and /dev/null differ