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diff --git a/2019-20/presentation/presentation.tex b/2019-20/presentation/presentation.tex
index e5c8ae5..fb572a2 100644
--- a/2019-20/presentation/presentation.tex
+++ b/2019-20/presentation/presentation.tex
@@ -191,14 +191,14 @@
 \section{Detector Design}
 	\begin{frame}
 		\frametitle{Detector Design}
-			\note[item]{ Old design => Markov 1960 multiple predecessors }
-			\note[item]{ compare with IceCube, ANTARES, DUMAND }
 		\pause
 		\begin{figure}
 			\includegraphics[width=0.8\textwidth]{images/principal-idea-neutrino-telescope-icecube-with-text.png}
 		\end{figure}
 	\end{frame}
 	\note[itemize]{
+		\item Old design => Markov 1960 multiple predecessors
+		\item compare with IceCube, ANTARES, DUMAND
 		\bigskip
 		\item Cherenkov light
 		\item Digital-Optical Module
@@ -267,6 +267,7 @@
 	\note[itemize]
 	{
 	\item PMT: gain $10^6$
+	\item PMT: compare amount with IceCube: 1:31
 	\item Acoustics: resolution to 20 cm $\mapsto$ 1 ns
 
 	}
@@ -292,6 +293,10 @@
 				\end{figure}
 		\end{columns}
 	\end{frame}
+	\note[itemize]
+	{
+	\item DOM uplink 1Gbps
+	}
 
 % Calibration
 %%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -305,6 +310,11 @@
 				\end{itemize}
 		\end{itemize}
 	\end{frame}
+	\note[itemize]
+	{
+		\item  8ns data
+		\item $1\mathrm{ns} \times c = 30\mathrm{cm}$ $\mapsto$ $\Delta x \approx 2.40\mathrm{m}$
+	}
 
 	%%
 	\begin{frame}
@@ -352,6 +362,7 @@
 	\item comparison of timings on the same string
 	\item Acoustics: position calibration
 	}
+
 	%%
 	\begin{frame}
 		\frametitle{Background Effects}
@@ -367,16 +378,24 @@
 	\item bioluminescence: marine sciences, effect of upto 10\%
 	\item
 	}
+
 % Events
 %%%%%%%%%%%%%%%%%%%%%%%%
 	\begin{frame}
 		\frametitle{Event Triggers}
+		\begin{columns}
+			\column{0.6\textwidth}
 		Multiple Triggers
 		\begin{itemize}
 			\item L0: 0.3 photo-electrons in PMT (in DOM)
 			\item L1: 2 hits in separate PMTs within 25ns
 			\item L2: use orientation of PMTs
 		\end{itemize}
+			\column{0.4\textwidth}
+			\begin{figure}
+				\includegraphics[width=\textwidth]{images/Neutrino-candidate-in-KM3NeT-ORCA6.jpg}
+			\end{figure}
+		\end{columns}
 	\end{frame}
 	\note[itemize]
 	{
@@ -386,6 +405,23 @@
 			\item study gives relative time offset mostly 10 ns.
 		\end{itemize}
 	\item L2: halves the remaining hits
+	
+	\item Causality: $25\mathrm{ns} \mapsto 7.5\mathrm{m}$
+	}
+
+	%%
+	\begin{frame}
+		\frametitle{Event Triggers: Muon Tracks and Showers}
+		\begin{figure}
+			\includegraphics[width=\textwidth]{images/km3net-track-length-estimation.png}
+		\end{figure}
+	\end{frame}
+	\note[itemize]
+	{
+	\item Various Trigger Algorithms
+	\item Muon track
+	\item directional filter $\sim 10^\circ$ $\mapsto$ 200 directions cover $4\pi$
+	\item shower events
 	}
 
 %%%%%%%%%%%%%%%%%%
@@ -406,7 +442,8 @@
 		\begin{columns}
 			\column{.4\textwidth}
 				\begin{itemize}
-					\item
+					\item 1 Building Block
+					\item dense packing $\mapsto$ sensitivity GeV to TeV
 				\end{itemize}
 			\column{.6\textwidth}
 			\begin{figure}
@@ -416,6 +453,10 @@
 	\end{frame}
 	\note[itemize]
 	{
+	\item depth: 2500m
+	\item height: 150m
+	\item width: \textit{see frame}
+	\item instrumented volume: 8 Million tonnes of water
 	\item horizontal distance 20m
 	\item vertical distance 6m
 	}
@@ -425,27 +466,34 @@
 		\end{figure}
 	\end{frame}
 
-\subsection{Neutrino Mass Hierarchy}
+%\subsection{Neutrino Mass Hierarchy}
+	%%
+	\begin{frame}
+		\frametitle{Neutrino Oscillations}
+		\begin{center}
+		\begin{itemize}
+			\item Pontecorvo - Maki - Nakagawa - Sakata matrix
+			\item 3 angles, 1 phase
+		\end{itemize}
+		\begin{figure}
+			\includegraphics[width=.8\textwidth]{images/neutrino-oscillation.jpg}
+		\end{figure}
+		\end{center}
+	\end{frame}
+	\note[itemize]
+	{
+		\item solar neutrino puzzle
+		\item
+		\item mass eigenstates $\neq$ flavour eigenstates, mass squared diff
+	}
+	
+	%%
 	\begin{frame}
 		\frametitle{Neutrino Mass Hierarchy}
 		\begin{figure}
 			\includegraphics[width=\textwidth]{images/neutrino-mass-hierarchies.png}
 		\end{figure}
 	\end{frame}
-
-	%%
-	\begin{frame}
-		\frametitle{Neutrino Oscillations}
-	\end{frame}
-	\note[itemize]
-	{
-	\item mass eigenstates $\neq$ flavour eigenstates, mass squared diff
-	}
-
-	%%
-	\begin{frame}
-		\frametitle{Neutrino Oscillations in Matter}
-	\end{frame}
 	\note[itemize]
 	{
 	\item vaccum oscillations insensitive to sign of mass sq. diff.
@@ -455,6 +503,11 @@
 	\item $\sigma(\nu N) \approx 2\sigma(\bar{\nu} N)$
 	}
 
+	%%
+	\begin{frame}
+		\includegraphics[width=\textwidth]{images/km3net-orca-significance-nmh.jpg}
+	\end{frame}
+
 
 %%%%%%%%%%%%%%%
 %% ARCA
@@ -493,7 +546,7 @@
 		\frametitle{IceCube and Expected Signal}
 		\begin{itemize}
 			\item Signals from 10 TeV to above 1 PeV
-			\item 54 events with reconstructed energy above 30TeV (2016)
+			\item 54 events with reconstructed energy above 30TeV (2016, IceCube)
 		\end{itemize}
 		\pause
 		\begin{figure}