--- a/slides/slides01.tex	Sun Sep 22 15:23:08 2013 +0100
+++ b/slides/slides01.tex	Sun Sep 22 15:35:50 2013 +0100
@@ -1,6 +1,6 @@
-\documentclass[dvipsnames,14pt,t]{beamer}
-\usepackage{beamerthemeplainculight}
-\usepackage[T1]{fontenc}
+\documentclass[dvipsnames,14pt,t, xelatex]{beamer}
+\usepackage{beamerthemeplaincu}
+%%\usepackage[T1]{fontenc}
 \usepackage[latin1]{inputenc}
 \usepackage{mathpartir}
 \usepackage[absolute,overlay]{textpos}
@@ -93,7 +93,7 @@
   \begin{center}
   \begin{tabular}{ll}
   Email:  & christian.urban at kcl.ac.uk\\
-  Of$\!$fice: & S1.27 (1st floor Strand Building)\\
+  Office: & S1.27 (1st floor Strand Building)\\
   Slides: & KEATS
   \end{tabular}
   \end{center}
@@ -118,8 +118,7 @@
 \begin{frame}[c]
 \frametitle{\begin{tabular}{@ {}c@ {}}Security Engineers\end{tabular}}
 
-According to Bruce Schneier, {\bf security engineers} require
-a particular {\bf mindset}:\bigskip
+\alert{\bf Security engineers} require a particular \alert{\bf mindset}:\bigskip
 
 \begin{tikzpicture}
 \draw (0,0) node[inner sep=2mm,fill=cream, ultra thick, draw=red, rounded corners=2mm] 
@@ -499,7 +498,7 @@
 \footnotesize a simple response from the server:
 
 {\lstset{language=Scala}\fontsize{8}{10}\selectfont
-\texttt{\lstinputlisting{app0.scala}}}\bigskip
+\texttt{\lstinputlisting{../progs/app0.scala}}}\bigskip
 
 \footnotesize
 alternative response:\\
@@ -514,7 +513,7 @@
 \begin{frame}[c]
 
 {\lstset{language=Scala}\fontsize{8}{10}\selectfont
-\texttt{\lstinputlisting{app1.scala}}}
+\texttt{\lstinputlisting{../progs/app1.scala}}}
 
   
 \end{frame}}
@@ -695,7 +694,7 @@
 \mbox{}\\[-9mm]
 
 {\lstset{language=Scala}\fontsize{8}{10}\selectfont
-\texttt{\lstinputlisting{app2.scala}}}
+\texttt{\lstinputlisting{../progs/app2.scala}}}
 
 \footnotesize
 \begin{itemize}
@@ -726,7 +725,7 @@
 \mbox{}\\[-7mm]
 
 {\lstset{language=Scala}\fontsize{8}{10}\selectfont
-\texttt{\lstinputlisting{app3.scala}}}
+\texttt{\lstinputlisting{../progs/app3.scala}}}
 
 \small
 \begin{itemize}
@@ -758,7 +757,7 @@
 \mbox{}\\[-9mm]
 
 {\lstset{language=Scala}\fontsize{8}{10}\selectfont
-\texttt{\lstinputlisting{app4.scala}}}
+\texttt{\lstinputlisting{../progs/app4.scala}}}
 
 \begin{textblock}{1}(9,1)
   \begin{tikzpicture}[scale=1.3]