% graphics
\usepackage{graphicx} % activate \includegraphics...
\usepackage{subfigure} % add subfigures in figures
\usepackage{epstopdf} % convert eps to pdf (supress .eps when incuding a graphic)
\usepackage{tikz} % activate vector graphics
	\tikzstyle{dim}		= [latex-latex] % define style "dim" (nice arrows) for dimensions
	\tikzstyle{load}	= [ultra thick,-latex]