\chapter*{abbreviations \markboth{abbreviations}{abbreviations}}
\label{chap}
\addcontentsline{toc}{chapter}{abbreviations}

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\begin{abbreviations}
\item[WSN] Wireless Sensor Network
\item[DILCO] Distributed Lifetime Coverage Optimization
\item[MuDiLCO] Multiround Distributed Lifetime Coverage Optimization
\item[PeCO] Perimeter-based Coverage Optimization
\item[DESK] Distributed Energy-efficient Scheduling for K-coverage
\item[GAF] Geographical Adaptive Fidelity
\item[PDA] Personal Digital Assistant
\item[WLAN] Wireless Local-Area Network
\item[MEMS] Micro-Electro-Mechanical Systems
\item[ADC] Analog to Digital Converters
\item[VCO] Voltage-Controlled Oscillator 
\item[PLL] Phase-Locked Loop
\item[GPS] Global Positioning System
\item[OS] Operating System
\item[CMOS]  Complementary Metal-Oxide-Silicon
\item[MAV] Micro Aerial Vehicle
\item[ECG] Electrocardiogram
\item[SCADA] Supervisory Control and Data Acquisition 
\item[]
\item[]
\item[]
\item[]
\end{abbreviations}

   