\documentclass[11pt]{article}

\begin{document}
\begin{center}
{\bf \Large The Title Goes Here}
\end{center}
\vspace*{.15in}

\noindent
\normalsize
\begin{center}
First Author \\
{\it \footnotesize Department 1, University 1, Country 1.}\\
{\it \footnotesize auth1@kkkk.uk}\medskip \\
Second Author, Third Author \\
\textit{\footnotesize Department 2, University 2, Country 2.}\\
{\it \footnotesize {auth2@kkkk.fa; auth3@kkkk.fa}}\medskip \\ 
\end{center} 


\begin{abstract}

\noindent The Abstract goes here.

\end{abstract}

\noindent \textbf{Keywords:} ..... , ....., ....., etc.


\begin{thebibliography}{0}
\bibitem{r8}B.R. Bird, R. C. Armstrong, and O. Hassager, {\it Dynamics of Polymeric Liquids}, second edition, John Wiley and Sons, Vol. 1, 1987.
\end{thebibliography}

\end{document}