Corrected error and added descriptions
Corrected error and added descriptions

SigmaITM/sigmaitm.github.io,SigmaITM/sigmaitm.github.io,SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io