\hyphenation{op-tical net-works semi-conduc-tor}
-\usepackage{float}
+\usepackage{float}
\usepackage{epsfig}
\usepackage{calc}
\usepackage{times,amssymb,amsmath,latexsym}
\begin{document}
-\title{Energy-Efficient Activity Scheduling in Heterogeneous Energy Wireless Sensor Networks}
+\title{Coverage and Lifetime Optimization in Heterogeneous Energy Wireless Sensor Networks}
+
+%Activity Scheduling for Coverage and Lifetime Optimization in Wireless Sensor Networks}
% author names and affiliations
% use a multiple column layout for up to three different
