\documentclass[jidm,a4paper]{jidm} % NOTE: JIDM is published on A4 paper
%\usepackage{graphicx,url}
\usepackage[T1]{fontenc}
\usepackage{algorithm}
\usepackage{algorithmic}
%\usepackage{subfig}
%\usepackage{epsfig}
%\usepackage{figlatex}
\usepackage{epstopdf}
\usepackage{graphics}
\usepackage[latin1]{inputenc}  
\usepackage{graphicx,url}
\usepackage{subfigure}
\usepackage{float}
\usepackage{amsmath}
\usepackage{multirow}

\newtheorem{theorem}{Theorem}[section]
\newtheorem{conjecture}[theorem]{Conjecture}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{lemma}[theorem]{Lemma}
\newdef{definition}[theorem]{Definition}
\newdef{remark}[theorem]{Remark}


\usepackage{color}
\newcommand{\cm}[1]{\textcolor{red}{#1}}


\jidmVolume{1}
\jidmNumber{2}
\jidmYear{10}
\jidmMonth{June}
\setcounter{page}{115}

\markboth{F. Benevneuto, A. Pereira, T. Rodrigues, V. Almeida, J. Almeida, and M. Gonçalves}{Characterization and Analysis of User Profiles in Online Video Sharing Systems}

\title{Characterization and Analysis of User Profiles in \\Online Video Sharing Systems}

\author{Fabrício Benevenuto$^1$, Adriano Pereira$^2$, Tiago Rodrigues$^1$, \\Virgílio Almeida$^1$, Jussara Almeida$^1$, Marcos Gonçalves$^1$}

\institute{Universidade Federal de Minas Gerais (UFMG) \\
Department of Computer Science (DCC)\\
Belo Horizonte, MG, Brazil \\
\email{\{fabricio, tiagorm, virgilio, jussara, mgoncalv\}@dcc.ufmg.br}
\vspace{0.3cm}
\and
Federal Center for Technological Education of Minas Gerais (CEFET-MG)\\
Department of Computer Engineering (DECOM) \\
Belo Horizonte, MG, Brazil \\
\email{adriano@decom.cefetmg.br}}


\begin{abstract}
Recently, it has been observed an increasing popularization of video sharing environments. Part of such success is due to the change on the user perspective from content consumer
to content creator, basic principle of the Web 2.0. Thus, video service providers are dealing with different challenges, such as content storage, performance and scalability of
servers, personalization, and service differentiation.  In this context, it is crucial to understand the characteristics of requests that arrive on these servers and the 
patterns of user navigation on these interactive systems. This work addresses these aspects. Through the analysis of a video service workload from UOL, the largest content provider of Latin
America, we present a complete characterization of user sessions, their requests to the server, and their navigation profile. Such analyses are important not only to generate
synthetic workload, but also to project and create new infra-structures to video sharing systems. Our results show that there are different users profiles and also provide a better
understanding of the user access pattern on video sharing systems. 

\end{abstract}


\category{H.3.5}{Online Information Services}{Web-based services}

\keywords{social networks, video sharing systems, video server, Web 2.0}

\begin{document} 

\begin{bottomstuff}
% similar to \thanks
% for authors' addresses; research/grant statements
\end{bottomstuff}

\maketitle




\input{01-intro.tex}
\input{02-related.tex}
\input{03-dataset.tex}
\input{04-charac.tex}
\input{05-session.tex}
\input{06-conc.tex}



\section*{Acknowledgements}
This work was supported by the Brazilian National Institute of Science and
Technology for the Web (CNPq grant no. 573871/2008-6), CNPq, CAPES, Finep, and Fapemig. 
We also would like to thank Universo OnLine S. A. - UOL (www.uol.com.br) for the data they provided, which made this research possible.  


%\bibliographystyle{abbrv}
\bibliographystyle{jidm}
\bibliography{references}

\begin{received}
\end{received}



\end{document}


