\renewcommand{\section}{\@startsection {section}{1}{\z@}%
                                   {-4.5ex \@plus -1ex \@minus -.2ex}%
                                   {1.3ex \@plus.2ex}%
                                   {\reset@font\large\bfseries}}
\renewcommand{\subsection}{\@startsection{subsection}{2}{\z@}%
                                     {-2.25ex\@plus -1ex \@minus -.2ex}%
                                     {0.5ex \@plus .2ex}%
                                     {\reset@font\large\bfseries}}
\def\@maketitle{%
  \newpage
  \null
  \vskip 2em%
%  \begin{center}%
    {\LARGE \@title \par}%
    \vskip 1.5em%
    {\normalsize
      \lineskip .5em%
     \begin{tabular}[t]{l}%
        \@author 
     \end{tabular}\par}%
    \vskip 1em%
 %   {\large \@date}%
 % \end{center}%
  \par
  \vskip 1.5em}

\setlength{\parskip}{1ex}

\newenvironment{abs}{ \small {\bf ABSTRACT} \\[-0.5cm] \begin{quote}}{
\end{quote} \normalsize  }

