--- a/prepaper/finalPre.tex	Wed Feb 17 16:42:42 2016 +0900
+++ b/prepaper/finalPre.tex	Wed Feb 17 18:57:25 2016 +0900
@@ -28,18 +28,15 @@
 \thispagestyle{fancy} 
 
 \section{Abstract}
-Screen sharing system TreeVNC multicast high resolution PC screen using tree structured network over client's PCs.
-Copying costs are balanced among these PC instead of centralize heavy costs on a VNC server.
+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.
-By supporting NAT. 
-By refactoring TreeVNC. 
-create screen change thread. it stabilize screen change.
-in case of sharing multiple screen, selected one screen sharing.
-本研究ではTreeVNCの改良として、NATへの対応を行った。
-また、リファクタリングとして、マルチディスプレイへの対応、画面切り替えの安定化、エラー通知用のメッセージの追加等を行うとともに、TreeVNC 有用性を示すために画像データの遅延時間計測を行った。
+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
 
 \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、