\documentclass{scrartcl}
\usepackage{color}
\usepackage{multicol}
\usepackage[final]{graphicx}
\usepackage{pst-plot,pstricks}
	\input{pstplot-logarithmic-axes}
\begin{document}
	\psset{xunit=3cm,yunit=4cm}
	\begin{pspicture}(-2.5,-1.2)(2.5,0.2)
		\psgrid[xunit=1,yunit=0.1,subgriddiv=0,griddots=5,gridlabels=0](-2,-12)(2,2)
		\psaxes[log=x,Dy=0.25]{->}(-2,0)(-2,-1.2)(2.2,0.2)
		\psplot[plotstyle=curve,linecolor=red]{-2}{-1}{-0.5}
		\psplot[plotstyle=curve,linecolor=red]{-1}{1}{x -0.25 mul 0.75 sub}
		\psplot[plotstyle=curve,linecolor=red]{1}{2}{-1}
		\psplot[plotstyle=curve,linecolor=green]{-2}{-0.3}{0}
		\psplot[plotstyle=curve,linecolor=green]{-0.3}{1.7}{x 0.3 add -0.25 mul}
		\psplot[plotstyle=curve,linecolor=green]{1.7}{2}{-0.5}
		\psplot[plotstyle=curve]{-2}{-1}{0}
		\psplot[plotstyle=curve]{-1}{-0.3}{x 1 add -0.25 mul}
		\psplot[plotstyle=curve]{-0.3}{1}{x 0.3 add -0.5 mul 0.7 -0.25 mul add}
		\psplot[plotstyle=curve]{1}{1.7}{x 1 sub -0.25 mul 1 0.3 add -0.5 mul 0.7 -0.25 mul add add}
		\psplot[plotstyle=curve]{1.7}{2}{1.7 1 sub -0.25 mul 1 0.3 add -0.5 mul 0.7 -0.25 mul add add}
		\rput(2.2,0.1){$\Omega=\frac{\omega}{\omega_0}$}
		\rput(-2.2,0.15){$\frac{\Theta}{\pi}$}
	\end{pspicture}
\end{document}
