diff --git a/thesis.tex b/thesis.tex
index e7f2670..37cdb7c 100644
--- a/thesis.tex
+++ b/thesis.tex
@@ -140,6 +140,10 @@
 \input{pt100/pt100}
 
 \chapter{FMMD functional~groups to \\derived component example : Non Inverting Op-AMP}
+\newboolean{dag}
+\setboolean{dag}{false} % boolvar=true or false
+\newboolean{pld}
+\setboolean{pld}{true} % boolvar=true or false
 \typeout{ ---------------- non inv op amp}
 \input{noninvopamp/noninvopamp}