\begin{table}%t1
      \caption{Model parameters and their meaning.}
         \label{tab:model}
               \begin{tabular}{ll}
        \hline\hline
	{\rm Large\ scale} & {\rm Disk} \\
	\hline 
	R & {\rm galactic\ radius} \\
	v$_{\rm rot}$ & {\rm rotation\ velocity} \\
	$\Omega$ & {\rm angular\ velocity} \\
	M$_{\rm dyn}$ & {\rm total\ enclosed\ (dynamical)\ mass} \\
	M$_{\rm gas}$ & {\rm total\ gas\ mass} \\
	v$_{\rm turb}$ & {\rm gas\ turbulent\ velocity\ dispersion} \\
	Q & {\rm Toomre\ parameter} \\
	$\rho$ & {\rm midplane\ density} \\
	$\Sigma$ & {\rm surface\ density} \\
	H & {\rm disk\ height} \\
	$\dot{M}$ & {\rm disk\ mass\ accretion\ rate} \\
	$\nu$ & {\rm viscosity} \\
	l$_{\rm driv}$ & {\rm turbulent\ driving\ length\ scale} \\
	$\delta$ & {\rm scaling\ parameter\ between\ driving}\\
	  & {\rm scale\ length\ and\ cloud\ size}\\
	$\Phi_{\rm V}$ & {\rm cloud\ volume\ filling\ factor} \\
	$\zeta$ & {\rm viscosity\ scaling\ parameter} \\
	t$_{\rm ff}^{\rm H}$ & {\rm disk\ vertical\ free\ fall\ time} \\
	$\dot{\rho}_*$ & {\rm star\ formation\ rate\ per\ unit\ volume}\\
	$\dot{\Sigma}_*$ & {\rm star\ formation\ rate\ per\ unit\ surface}\\
	$\dot{M}_*$ & {\rm star\ formation\ rate} \\
	$\xi$ & {\rm conversion\ factor\ for\ SN\ energy\ flux}\\
	$\eta$ & {\rm star\ formation\ efficiency\ in\ the}\\
	  & {\rm collisional\ model}\\
	$\gamma$ & {\rm linking\ factor\ between\ M$_{\rm gas}$\ and\ $\dot{\rm M}$}\\
	  & {\rm for\ torus\ evolution}\\  
	$\vartheta$ & {\rm disk\ transparency} \\
	$\dot{M}_{\rm BH}$ & {\rm mass\ accretion\ rate\ onto\ the\ black\ hole}\\
	$\dot{M}_{\rm wind}$ & {\rm wind\ outflow\ rate}\\
	J$_{\rm UV}$ & {\rm~AGN\ UV\ radiation\ field}\\
	%\hline
	\hline
	{\rm Small\ scale} & {\rm Clouds}  \\
	\hline
	%\hline
	t$_{\rm coll}$ & {\rm timescale\ for\ cloud-cloud\ collisions}\\ 
	l$_{\rm coll}$ & {\rm cloud\ mean\ free\ path} \\ 
	M$_{\rm cl}$ & {\rm cloud\ mass} \\
	r$_{\rm cl}$ & {\rm cloud\ radius} \\
	N$_{\rm cl}$ & {\rm cloud\ surface\ density} \\
	c$_{\rm s}$ & {\rm local\ sound\ speed\ within\ the\ clouds}\\
	t$_{\rm s}$ & {\rm sound\ crossing\ time\ of\ clouds} \\
	t$_{\rm ff}^{\rm cl}$ & {\rm cloud\ free\ fall\ time}\\
	T & {\rm temperature} \\
	c$_{\rm i}$ & {\rm sound\ crossing\ time\ of\ the\ ionized\ gas}\\
	\hline
        \end{tabular}
\end{table}