add real-world hashtag usage with symbol pictures

shell.nix

@@ -28,6 +28,8 @@ mkShell {
       biblatex
       logreq
       koma-script
+      xits
+      opensans
       ;
 
       # custom LaTeX class, see https://github.com/NixOS/nixpkgs/issues/11893#issuecomment-166834399
@@ -36,7 +38,8 @@ mkShell {
       };
     })
     biber
-    tud-cd
+    opensans-ttf
+    xits-math
 
     # for instance DNS query script
     (python3.withPackages (ps: with ps; [ 

statistics/friendica_hashtags_total.plot

@@ -9,4 +9,4 @@ set style fill transparent solid 0.75
 set xlabel "n-th most popular hashtag"
 set ylabel "number of posts"
 # read data from stdin
-plot 'piratica_squeetme/plot_total.dat' using 0:1 title "aggregated posts per tag on pirati.ca and squet.me" with fillsteps
+plot 'piratica_squeetme/plot_total.dat' using 0:1 title "aggregated posts per tag on pirati.ca and squeet.me" with fillsteps

talk-slides.tex

@@ -1,7 +1,7 @@
 % $Header$
 % use lualatex for compilation
 
-\documentclass[aspectratio=169]{beamer}
+\documentclass[aspectratio=169,navbar=false]{beamer}
 
 % This file is a solution template for:
 
@@ -26,7 +26,7 @@
 
 \mode<presentation>
 {
-  \usetheme[cd2018,noddc,navbar,darktitlepage]{tud}
+  \usetheme[cd2018,noddc,darktitlepage]{tud}
   \usecolortheme{tud}
   % or ...
 
@@ -36,13 +36,15 @@
 
 % notes on 2nd screen:
 \usepackage{pgfpages}
-%\setbeameroption{show notes on second screen}
+\setbeameroption{show notes on second screen}
 
 \usepackage[british]{babel}
 % or whatever
 
 \usepackage[backend=biber, sorting=none]{biblatex}
 
+\usepackage{ccicons}
+
 \usepackage{ifluatex}
 
 \ifluatex
@@ -113,6 +115,12 @@ for Federated Social Networks}
 
 \maketitle
 
+\note{introduce myself:\\
+known as schmittlauch on the Internet\\
+student of Computer Science @ TU Dresden\\
+interest in federated systems and unusual social networks\\
+presenting my work on a study paper from this year}
+
 
 \begin{frame}{Outline}
   \tableofcontents
@@ -139,26 +147,125 @@ for Federated Social Networks}
 
 \section{Motivation}
 
-\subsection{Importance of \#Hashtags}
+\begin{frame}{Welcome to ActivityPubConf!}{Motivation}
 
-\subsection{State of Hashtags in the Fediverse}
+
+\only<1>{
+  \includegraphics[width=\textwidth]{figures/toot_nohashtags.png}
+  \note{Who has been posting about this Conference?}
+}
+\only<2>{
+  \includegraphics[width=\textwidth]{figures/toot_hashtags.png}
+  \note{And who used \#ActivityPubConf?}
+}
+\end{frame}
+
+
+\subsection{Importance of \#Hashtags}
 
 \begin{frame}{Importance of \#Hashtags}{}
 
+Hashtags are used for marking posts about certain topics or events:
   \begin{columns}
   \begin{column}{0.47\textwidth}
 
     \begin{itemize}
-    \item foo
+    \item<1-> \textbf{events}: \#ActivityPubConf, \#CCCamp19
+    \item<2-> \textbf{political topics}: \#SaveTheInternet
+    \item<3-> \textbf{general topics}: \#mastoadmin, \#Tusky
+    \item<4-> \textbf{ongoing demonstrations}: \#GeziPark, \#WomensMarch
+    \item<5-> \textbf{social movements}: \#MeToo
     \end{itemize}
   \end{column}
   \begin{column}{0.5\textwidth}
-   bar 
+  \center
+  \only<1>{
+    \includegraphics[width=\textwidth]{figures/APConfLogo.png}
+  }
+  \only<2>{
+    \includegraphics[height=0.58\paperheight]{figures/hashtag_savetheinternet.jpg}\\
+    \tiny{\href{https://www.flickr.com/photos/8183946@N05/14733648892}{"Obama in the Backseat: Rally to Save the Internet"} by \href{https://www.flickr.com/photos/8183946@N05}{Free Press Pics} is licensed under \href{https://creativecommons.org/licenses/by-sa/2.0/?ref=ccsearch&atype=rich}{CC BY-SA 2.0} \ccbysa}
+  }
+  \only<3>{
+    \includegraphics[height=0.6\paperheight]{figures/Elephant_Friend_(Greeting).png}
+  }
+  \only<4>{
+    \includegraphics[width=\textwidth]{figures/hashtag_gezipark.jpg}
+  }
+  \only<5>{
+  \includegraphics[height=0.6\paperheight]{figures/hashtag_metoo.jpg}\\
+  \tiny{\href{https://www.flickr.com/photos/50612692@N04/28039368079}{"IMG\_4263"} by \href{https://www.flickr.com/photos/50612692@N04}{GGAADD} is licensed under \href{https://creativecommons.org/licenses/by-sa/2.0/?ref=ccsearch&atype=rich}{CC BY-SA 2.0} \ccbysa}
+}
   \end{column}
   \end{columns}
 
 \end{frame}
 
+\subsection{State of Hashtags in the Fediverse}
+
+\begin{frame}{State of Hashtags on the Fediverse}{}
+{\center \Large Hashtags are used in the fediverse}
+\pause 
+\vspace{2em}
+
+{\large But do they behave as expected?}
+\end{frame}
+
+\begin{frame}
+\begin{columns}
+ \begin{column}{0.5\textwidth}
+ \begin{figure}
+  \includegraphics[height=0.65\paperheight]{figures/{activitypubconf_toot.matereal.eu}.png}
+  \caption{\#activitypubconf on the single-user instance \textit{toot.matereal.eu}}
+ \end{figure}
+ \end{column}
+ 
+ \begin{column}{0.5\textwidth}
+ \begin{figure}
+  \includegraphics[height=0.65\paperheight]{figures/{activitypubconf_mastodon.social}.png}
+  \caption{\#activitypubconf on the large instance \textit{mastodon.social}}
+ \end{figure}
+ \end{column}
+ \end{columns}
+
+\end{frame}
+
+\begin{frame}{State of Hashtags on the Fediverse}{Fragmentation}
+ \begin{itemize}
+  \item fragmented view on hashtag posts depending on user's instance
+  \item hashtag search only shows posts already known to the instance
+  \item Result: incentive to cluster on large nodes \(\Leftarrow\) centralisation
+ \end{itemize}
+
+\end{frame}
+
+\begin{frame}{Reason}{Push-Federation}
+ \begin{itemize}
+  \item subscription to \texttt{@alice@example.com} by contacting instance \texttt{example.com}
+  \item all future posts by alice are
+ \end{itemize}
+
+\end{frame}
+
+
+
+\section{System Architecture}
+
+\begin{frame}{System Architecture}{adding a P2P backend to the fediverse}
+
+\end{frame}
+
+why even still use classic push federation?
+
+\section{Discussion}
+
+\begin{frame}{Discussion}{I need YOUR feedback}
+
+I want feedback from all of you, no matter whether it's from a \textit{\LARGE technical} or from a \textit{\LARGE social perspective}.
+
+\end{frame}
+
+\subsection{Social Considerations}
 
 \section{Summary}