I am using this macro:
\newcommand{\ssection}[1]{\section[1]{\centering #1}}
\ssection{BACKGROUND}
Result, is centered but there are couple of spaces between 1 and B:
1 BACKGROUND
The result i am looking for
1.BACKGROUND
\newcommand{\ssection}[1]{. \section[1]{\centering #1}}
This gives me '1.' two extra spaces then '.BACKGROUND'