--- a/prepaper/finalPre.tex	Wed Feb 17 18:57:25 2016 +0900
+++ b/prepaper/finalPre.tex	Wed Feb 17 22:06:25 2016 +0900
@@ -2,6 +2,7 @@
 \usepackage[dvipdfmx]{graphicx}
 \usepackage{picins}
 \usepackage{fancyhdr}
+\usepackage{abstract}
 \usepackage{url}
 %\pagestyle{fancy}
 \lhead{\parpic{\includegraphics[height=1zw,keepaspectratio,bb=0 0 251 246]{pic/emblem-bitmap.pdf}}琉球大学主催 工学部情報工学科 卒業研究発表会}
@@ -19,24 +20,24 @@
 \pagestyle{empty}
 
 \input{dummy.tex}
+\renewcommand{\abstractname}{Abstract}
 \begin{document}
 \title{PC画面配信システムTreeVNCの NAT への対応}
 %\title{Supporting NAT in Screen Sharing System TreeVNC}
 \author{125716B 氏名 {伊波}{立樹} 指導教員 : 河野 真治}
 \date{}
+\twocolumn [
 \maketitle
-\thispagestyle{fancy} 
-
-\section{Abstract}
+\begin{onecolabstract}
 An implementation of Screen sharing system is presented.
 TreeVNC supports multicasting high resolution PC screen using tree structured network over PCs.
 Copying costs are distributed instead of the centralized heavy costs on a VNC server.
 It also possible to change screen server dynamically without changing display cables.
-TreeVNC is useful in a lecture which contains 40-60 students or small seminar.
-
-We add several improvements on TreeVNC, such as new connection method for supporting NAT, screen change in a separated thread, multiple screen selection, notification of connection errors.
-
+TreeVNC is useful in a lecture which contains 40-60 students or small seminar.  
+We add several improvements on TreeVNC, such as new connection method for supporting NAT, screen change in a separated thread, multiple screen selection, notification of connection errors.  
 We also show the delay time distribution in real environments
+\end{onecolabstract}]
+\thispagestyle{fancy} 
 
 \section{画面共有を利用したコミュニケーション}
 授業やゼミ等で、それぞれが PC 端末を持っている場合では、