Title: Microsoft Word - PLA_Final_FOC_arXiv4.doc Author: ruwang Creator: PScript5.dll Version 5.2 Producer: Acrobat Distiller 7.0.5 (Windows) CreationDate: Mon Sep 25 14:21:38 2006 ModDate: Mon Sep 25 14:26:39 2006 Tagged: no Form: none Pages: 4 Encrypted: no Page size: 612 x 792 pts (letter) (rotated 0 degrees) File size: 75347 bytes Optimized: no PDF version: 1.7