diff --git a/fig/concentrators/v1/s0/s0d1d2.png b/fig/concentrators/v1/s0/s0d1d2.png
deleted file mode 100644
index c7cfb16..0000000
Binary files a/fig/concentrators/v1/s0/s0d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/s0/s0d3d4.png b/fig/concentrators/v1/s0/s0d3d4.png
deleted file mode 100644
index 743083d..0000000
Binary files a/fig/concentrators/v1/s0/s0d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/s0/s0d5d6.png b/fig/concentrators/v1/s0/s0d5d6.png
deleted file mode 100644
index c5dcc9c..0000000
Binary files a/fig/concentrators/v1/s0/s0d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/s0/s0d7.png b/fig/concentrators/v1/s0/s0d7.png
deleted file mode 100644
index 4c90e14..0000000
Binary files a/fig/concentrators/v1/s0/s0d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/s1/s1d1d2.png b/fig/concentrators/v1/s1/s1d1d2.png
deleted file mode 100644
index a2e4421..0000000
Binary files a/fig/concentrators/v1/s1/s1d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/s1/s1d3d4.png b/fig/concentrators/v1/s1/s1d3d4.png
deleted file mode 100644
index 8970d65..0000000
Binary files a/fig/concentrators/v1/s1/s1d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/s1/s1d5d6.png b/fig/concentrators/v1/s1/s1d5d6.png
deleted file mode 100644
index 717061a..0000000
Binary files a/fig/concentrators/v1/s1/s1d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/s1/s1d7.png b/fig/concentrators/v1/s1/s1d7.png
deleted file mode 100644
index 1764b1c..0000000
Binary files a/fig/concentrators/v1/s1/s1d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/s2/s2d1d2.png b/fig/concentrators/v1/s2/s2d1d2.png
deleted file mode 100644
index dbf1b9c..0000000
Binary files a/fig/concentrators/v1/s2/s2d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/s2/s2d3d4.png b/fig/concentrators/v1/s2/s2d3d4.png
deleted file mode 100644
index a4ce91b..0000000
Binary files a/fig/concentrators/v1/s2/s2d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/s2/s2d5d6.png b/fig/concentrators/v1/s2/s2d5d6.png
deleted file mode 100644
index 9dcabff..0000000
Binary files a/fig/concentrators/v1/s2/s2d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/s2/s2d7.png b/fig/concentrators/v1/s2/s2d7.png
deleted file mode 100644
index 5312f5d..0000000
Binary files a/fig/concentrators/v1/s2/s2d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d1.png b/fig/concentrators/v1/scheme1/d1.png
deleted file mode 100644
index dd4b98b..0000000
Binary files a/fig/concentrators/v1/scheme1/d1.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d1d2.png b/fig/concentrators/v1/scheme1/d1d2.png
deleted file mode 100644
index 103ab0e..0000000
Binary files a/fig/concentrators/v1/scheme1/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d2.png b/fig/concentrators/v1/scheme1/d2.png
deleted file mode 100644
index 4485762..0000000
Binary files a/fig/concentrators/v1/scheme1/d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d3.png b/fig/concentrators/v1/scheme1/d3.png
deleted file mode 100644
index 641b3cc..0000000
Binary files a/fig/concentrators/v1/scheme1/d3.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d3d6.png b/fig/concentrators/v1/scheme1/d3d6.png
deleted file mode 100644
index 3b8085f..0000000
Binary files a/fig/concentrators/v1/scheme1/d3d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d4.png b/fig/concentrators/v1/scheme1/d4.png
deleted file mode 100644
index 22d0016..0000000
Binary files a/fig/concentrators/v1/scheme1/d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d4d7.png b/fig/concentrators/v1/scheme1/d4d7.png
deleted file mode 100644
index cae9561..0000000
Binary files a/fig/concentrators/v1/scheme1/d4d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d5.png b/fig/concentrators/v1/scheme1/d5.png
deleted file mode 100644
index 3a77fc4..0000000
Binary files a/fig/concentrators/v1/scheme1/d5.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d6.png b/fig/concentrators/v1/scheme1/d6.png
deleted file mode 100644
index a8b3c94..0000000
Binary files a/fig/concentrators/v1/scheme1/d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme1/d7.png b/fig/concentrators/v1/scheme1/d7.png
deleted file mode 100644
index 5cb33f2..0000000
Binary files a/fig/concentrators/v1/scheme1/d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d1.png b/fig/concentrators/v1/scheme2/d1.png
deleted file mode 100644
index 014408b..0000000
Binary files a/fig/concentrators/v1/scheme2/d1.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d1d2.png b/fig/concentrators/v1/scheme2/d1d2.png
deleted file mode 100644
index 431d3ec..0000000
Binary files a/fig/concentrators/v1/scheme2/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d2.png b/fig/concentrators/v1/scheme2/d2.png
deleted file mode 100644
index 0004315..0000000
Binary files a/fig/concentrators/v1/scheme2/d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d3.png b/fig/concentrators/v1/scheme2/d3.png
deleted file mode 100644
index e32f74b..0000000
Binary files a/fig/concentrators/v1/scheme2/d3.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d3d6.png b/fig/concentrators/v1/scheme2/d3d6.png
deleted file mode 100644
index 2d5acc0..0000000
Binary files a/fig/concentrators/v1/scheme2/d3d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d4.png b/fig/concentrators/v1/scheme2/d4.png
deleted file mode 100644
index cdcfaf2..0000000
Binary files a/fig/concentrators/v1/scheme2/d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d4d7.png b/fig/concentrators/v1/scheme2/d4d7.png
deleted file mode 100644
index 88366f8..0000000
Binary files a/fig/concentrators/v1/scheme2/d4d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d5.png b/fig/concentrators/v1/scheme2/d5.png
deleted file mode 100644
index ee108c4..0000000
Binary files a/fig/concentrators/v1/scheme2/d5.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d6.png b/fig/concentrators/v1/scheme2/d6.png
deleted file mode 100644
index 93f2460..0000000
Binary files a/fig/concentrators/v1/scheme2/d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme2/d7.png b/fig/concentrators/v1/scheme2/d7.png
deleted file mode 100644
index 7e9f7dd..0000000
Binary files a/fig/concentrators/v1/scheme2/d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d1.png b/fig/concentrators/v1/scheme3/d1.png
deleted file mode 100644
index 7c373fa..0000000
Binary files a/fig/concentrators/v1/scheme3/d1.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d1d2.png b/fig/concentrators/v1/scheme3/d1d2.png
deleted file mode 100644
index 8104b04..0000000
Binary files a/fig/concentrators/v1/scheme3/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d2.png b/fig/concentrators/v1/scheme3/d2.png
deleted file mode 100644
index dd22855..0000000
Binary files a/fig/concentrators/v1/scheme3/d2.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d3.png b/fig/concentrators/v1/scheme3/d3.png
deleted file mode 100644
index edf0607..0000000
Binary files a/fig/concentrators/v1/scheme3/d3.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d3d6.png b/fig/concentrators/v1/scheme3/d3d6.png
deleted file mode 100644
index dc23ba1..0000000
Binary files a/fig/concentrators/v1/scheme3/d3d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d4.png b/fig/concentrators/v1/scheme3/d4.png
deleted file mode 100644
index 2d3e242..0000000
Binary files a/fig/concentrators/v1/scheme3/d4.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d4d7.png b/fig/concentrators/v1/scheme3/d4d7.png
deleted file mode 100644
index 4b97e81..0000000
Binary files a/fig/concentrators/v1/scheme3/d4d7.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d5.png b/fig/concentrators/v1/scheme3/d5.png
deleted file mode 100644
index 6ac213e..0000000
Binary files a/fig/concentrators/v1/scheme3/d5.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d6.png b/fig/concentrators/v1/scheme3/d6.png
deleted file mode 100644
index 4633cc5..0000000
Binary files a/fig/concentrators/v1/scheme3/d6.png and /dev/null differ
diff --git a/fig/concentrators/v1/scheme3/d7.png b/fig/concentrators/v1/scheme3/d7.png
deleted file mode 100644
index f00d259..0000000
Binary files a/fig/concentrators/v1/scheme3/d7.png and /dev/null differ
diff --git a/fig/concentrators/v2/s0/d1d2.png b/fig/concentrators/v2/s0/d1d2.png
deleted file mode 100644
index 752673b..0000000
Binary files a/fig/concentrators/v2/s0/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/s0/d3d4.png b/fig/concentrators/v2/s0/d3d4.png
deleted file mode 100644
index 8d36c53..0000000
Binary files a/fig/concentrators/v2/s0/d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/s0/d5d6.png b/fig/concentrators/v2/s0/d5d6.png
deleted file mode 100644
index 539fc77..0000000
Binary files a/fig/concentrators/v2/s0/d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v2/s1/d1d2.png b/fig/concentrators/v2/s1/d1d2.png
deleted file mode 100644
index aaa1e6f..0000000
Binary files a/fig/concentrators/v2/s1/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/s1/d3d4.png b/fig/concentrators/v2/s1/d3d4.png
deleted file mode 100644
index 7b8df7c..0000000
Binary files a/fig/concentrators/v2/s1/d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/s1/d5d6.png b/fig/concentrators/v2/s1/d5d6.png
deleted file mode 100644
index 8558249..0000000
Binary files a/fig/concentrators/v2/s1/d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v2/s2/d1d2.png b/fig/concentrators/v2/s2/d1d2.png
deleted file mode 100644
index 074a309..0000000
Binary files a/fig/concentrators/v2/s2/d1d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/s2/d3d4.png b/fig/concentrators/v2/s2/d3d4.png
deleted file mode 100644
index ecc34f8..0000000
Binary files a/fig/concentrators/v2/s2/d3d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/s2/d5d6.png b/fig/concentrators/v2/s2/d5d6.png
deleted file mode 100644
index e4337dc..0000000
Binary files a/fig/concentrators/v2/s2/d5d6.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d1.png b/fig/concentrators/v2/scheme1/d1.png
deleted file mode 100644
index 229c63c..0000000
Binary files a/fig/concentrators/v2/scheme1/d1.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d1d3.png b/fig/concentrators/v2/scheme1/d1d3.png
deleted file mode 100644
index 3dc0b32..0000000
Binary files a/fig/concentrators/v2/scheme1/d1d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d2.png b/fig/concentrators/v2/scheme1/d2.png
deleted file mode 100644
index fd0ea2e..0000000
Binary files a/fig/concentrators/v2/scheme1/d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d2d4.png b/fig/concentrators/v2/scheme1/d2d4.png
deleted file mode 100644
index 0071814..0000000
Binary files a/fig/concentrators/v2/scheme1/d2d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d3.png b/fig/concentrators/v2/scheme1/d3.png
deleted file mode 100644
index 65e3aab..0000000
Binary files a/fig/concentrators/v2/scheme1/d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme1/d4.png b/fig/concentrators/v2/scheme1/d4.png
deleted file mode 100644
index 173ac50..0000000
Binary files a/fig/concentrators/v2/scheme1/d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d1.png b/fig/concentrators/v2/scheme2/d1.png
deleted file mode 100644
index 427bc7f..0000000
Binary files a/fig/concentrators/v2/scheme2/d1.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d1d3.png b/fig/concentrators/v2/scheme2/d1d3.png
deleted file mode 100644
index 9d176ac..0000000
Binary files a/fig/concentrators/v2/scheme2/d1d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d2.png b/fig/concentrators/v2/scheme2/d2.png
deleted file mode 100644
index 32c68ea..0000000
Binary files a/fig/concentrators/v2/scheme2/d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d2d4.png b/fig/concentrators/v2/scheme2/d2d4.png
deleted file mode 100644
index e0907ab..0000000
Binary files a/fig/concentrators/v2/scheme2/d2d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d3.png b/fig/concentrators/v2/scheme2/d3.png
deleted file mode 100644
index 9a9ff8c..0000000
Binary files a/fig/concentrators/v2/scheme2/d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme2/d4.png b/fig/concentrators/v2/scheme2/d4.png
deleted file mode 100644
index 62cd21d..0000000
Binary files a/fig/concentrators/v2/scheme2/d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d1.png b/fig/concentrators/v2/scheme3/d1.png
deleted file mode 100644
index abbfc95..0000000
Binary files a/fig/concentrators/v2/scheme3/d1.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d1d3.png b/fig/concentrators/v2/scheme3/d1d3.png
deleted file mode 100644
index 54f0332..0000000
Binary files a/fig/concentrators/v2/scheme3/d1d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d2.png b/fig/concentrators/v2/scheme3/d2.png
deleted file mode 100644
index 9cd3846..0000000
Binary files a/fig/concentrators/v2/scheme3/d2.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d2d4.png b/fig/concentrators/v2/scheme3/d2d4.png
deleted file mode 100644
index 8327894..0000000
Binary files a/fig/concentrators/v2/scheme3/d2d4.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d3.png b/fig/concentrators/v2/scheme3/d3.png
deleted file mode 100644
index 51f37ee..0000000
Binary files a/fig/concentrators/v2/scheme3/d3.png and /dev/null differ
diff --git a/fig/concentrators/v2/scheme3/d4.png b/fig/concentrators/v2/scheme3/d4.png
deleted file mode 100644
index 4479eb2..0000000
Binary files a/fig/concentrators/v2/scheme3/d4.png and /dev/null differ