% $Header$
% use lualatex for compilation

\documentclass[aspectratio=169,navbar=false]{beamer}

% This file is a solution template for:

% - Talk at a conference/colloquium.
% - Talk length is about 20min.
% - Style is ornate.



% Copyright 2004 by Till Tantau <tantau@users.sourceforge.net>.
%
% In principle, this file can be redistributed and/or modified under
% the terms of the GNU Public License, version 2.
%
% However, this file is supposed to be a template to be modified
% for your own needs. For this reason, if you use this file as a
% template and not specifically distribute it as part of a another
% package/program, I grant the extra permission to freely copy and
% modify this file as you see fit and even to delete this copyright
% notice. 


\mode<presentation>
{
  \usetheme[cd2018,noddc,darktitlepage]{tud}
  \usecolortheme{tud}
  % or ...

  %\setbeamercovered{transparent}
  % or whatever (possibly just delete it)
}

% notes on 2nd screen:
\usepackage{pgfpages}
\setbeameroption{show notes on second screen}

\usepackage[british]{babel}
% or whatever

\usepackage[backend=biber, sorting=none]{biblatex}

\usepackage{ccicons}

\usepackage{ifluatex}

\ifluatex
\usepackage{fontspec}

\else
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
% Or whatever. Note that the encoding and the font should match. If T1
% does not look nice, try deleting the line with the fontenc.
\fi

\title[Decentralised Hashtag Federation] % (optional, use only with long paper titles)
{Decentralised Hashtag Search and Subscription
for Federated Social Networks}

\author
{Trolli Schmittlauch}
% - Give the names in the same order as the appear in the paper.
% - Use the \inst{?} command only if the authors have different
%   affiliation.

\institute[] % (optional, but mostly needed)
{
  Department of Computer Science\\
  Technical University Dresden
}

\date[APConf 2019] % (optional, should be abbreviation of conference name)
{ActivityPubConf 2019}
\datecity{Prague}
% - Either use conference name or its abbreviation.
% - Not really informative to the audience, more for people (including
%   yourself) who are reading the slides online

%\subject{Privacy}
% This is only inserted into the PDF information catalog. Can be left
% out. 



% If you have a file called "university-logo-filename.xxx", where xxx
% is a graphic format that can be processed by latex or pdflatex,
% resp., then you can add a logo as follows:

% \pgfdeclareimage[height=0.5cm]{university-logo}{university-logo-filename}
% \logo{\pgfuseimage{university-logo}}



% Delete this, if you do not want the table of contents to pop up at
% the beginning of each subsection:
%\AtBeginSubsection[]
%{
%  \begin{frame}<beamer>{Outline}
%    \tableofcontents[currentsection,currentsubsection]
%  \end{frame}
%}


% If you wish to uncover everything in a step-wise fashion, uncomment
% the following command: 

%\beamerdefaultoverlayspecification{<+->}


\begin{document}

\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
  % You might wish to add the option [pausesections]
\end{frame}


% Structuring a talk is a difficult task and the following structure
% may not be suitable. Here are some rules that apply for this
% solution: 

% - Exactly two or three sections (other than the summary).
% - At *most* three subsections per section.
% - Talk about 30s to 2min per frame. So there should be between about
%   15 and 30 frames, all told.

% - A conference audience is likely to know very little of what you
%   are going to talk about. So *simplify*!
% - In a 20min talk, getting the main ideas across is hard
%   enough. Leave out details, even if it means being less precise than
%   you think necessary.
% - If you omit details that are vital to the proof/implementation,
%   just say so once. Everybody will be happy with that.

\section{Motivation}

\begin{frame}{Welcome to ActivityPubConf!}{Motivation}


\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<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}
  \begin{overlayarea}{\textwidth}{0.6\paperheight}
  \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{overlayarea}
  \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}

\begin{frame}{Summary}

  % Keep the summary *very short*.
  \begin{itemize}
  \item
    things can be \alert{highlighted}.
  \end{itemize}
  
  % The following outlook is optional.
  \vskip0pt plus.5fill
  \begin{itemize}
  \item
    Outlook
  \end{itemize}
\end{frame}



% All of the following is optional and typically not needed. 
\appendix
\section<presentation>*{\appendixname}
\subsection<presentation>*{For Further Reading}

\begin{frame}[allowframebreaks]
  \frametitle{References}
    
  
  
    %\bibliography{literature}
   
\end{frame}

\begin{frame}
 
 \center\huge{Thank you for your attention!}
 
 %\includegraphics[height=0.5\textheight]{figures/nomnompingu.png}\tiny\footnote{CC-BY-SA 3.0 by Elektroll}
 
\end{frame}


\end{document}
