Update by Ali

[ThesisAli.git] / CHAPITRE_01.tex

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@@ -55,11 +55,11 @@ Furthermore, additional components can be incorporated into wireless sensor node
 
 \begin{enumerate} [(I)]         
 
 
 \begin{enumerate} [(I)]         
 

-\item \textbf{Localization System:} It is important that the wireless sensor node is equipped with a location finding system because it is necessary for many WSN applications. It is required for routing algorithms and sensing coverage algorithms, which need information about the location of the wireless sensor nodes. The location finding system is composed of a Global Positioning System (GPS) or a discovery algorithm that executes a localization system to provides information about the location of wireless sensor node using distributed computation.
+\item \textbf{Localization System:} It is important that the wireless sensor node is equipped with a location finding system because it is necessary for many WSN applications. It is required for routing algorithms and sensing coverage algorithms, which need information about the location of the wireless sensor nodes. The location finding system is composed of a Global Positioning System (GPS) or a discovery algorithm that executes a localization system to provide information about the location of wireless sensor node using distributed computation \cite{ref232,ref233}.

 
 

-\item \textbf{Mobilizer:} The mobility function is sometimes needed in many applications to move the wireless sensor node from one location to another so as to perform a certain task in WSN. Therefore, it is necessary that the wireless sensor node equipped with the mobilizer system for such applications. A high energy consumption is needed to support the mobility in wireless sensor node, and it should be supported efficiently. The movement of wireless sensor node is controlled by the mobility function with cooperation with the sensing unit and the computation unit.
+\item \textbf{Mobilizer:} The mobility function is sometimes needed in many applications to move the wireless sensor node from one location to another so as to perform a certain task in WSN. Therefore, it is necessary to equip the node  with the mobilizer system for such applications. A high energy consumption is needed to support the mobility in wireless sensor node, and it should be supported efficiently. The movement of wireless sensor node is controlled by the mobility function with cooperation with the sensing unit and the computation unit.

 
 

-\item \textbf{Power Generator:} Several applications in WSNs need to operate for a longer time. So, it is essential to equip the wireless sensor node with additional power source in order to prolong the network lifetime. The better energy source to generate the power for outdoor applications is a solar cell. An another power harvesting mechanisms~\cite{ref20,ref21} for thermal, motion, vibration, micro water flow, Biological, pressure gradients, and electromagnetic radiation energy harvesting can be used to yield increasing power output to extend the network lifetime. 
+\item \textbf{Power Generator:} Several applications in WSNs need to operate for a longer time. So, it is essential to equip the wireless sensor node with additional power source in order to prolong the network lifetime. The better energy source to generate the power for outdoor applications is a solar cell. An another power harvesting mechanisms~\cite{ref20,ref21} like thermal, motion, vibration, micro water flow, biological, pressure gradients, and electromagnetic radiation energy harvesting can be used to yield increasing power output and to extend the network lifetime. 

 \end{enumerate}
 
 \begin{figure}[h!]
 \end{enumerate}
 
 \begin{figure}[h!]