             _   _			  			   _
	     \\  \\		          >		          //
	      \\  \\_	                 <	     		 _
                  \\             _      )          (         _//
                 _  \\          _/      (          _))_      / /
                 \\     _______/         )       <<_@+_>>    
      \        __/_ /\ __      (_      __ <.,>    _// 
	  \___/_\/_\ ____ ))       |
	       \   _____>\_____/ ___ ((_|  A  b  s  t  r  a  k  t  |
	         \__>____<<__/ _ >>>|  __      _ ______ __    _
                 |>>_ (_(_(   __>\_<<<__   // 
	         | >>__(__( _(  _ >__>>><_  _           |o|
	       : |<< \(\ <\< _/< >>_<<<< _\_>\_     _|o|
                 | V  \< \< _ >_ << >\><</<_  _\ __ \> |o|
                 |o|       /< >> _>'<<'<< _ << >\_   |	| /
                 |o|________</<__> _\____/<<<__>\<__  | :  --
	         | |>><_> \//_>____>___<\\/ <  | | \
                 | / >__ __ >>_<(@)|(@)>_< ___<__|	|
                 __>  >__:.\__<<>_><o_o><_<>>.:/\  /<|_|____
                /\__:._|||\_>>>_V___V_(<<_|| /\__   \__/\
            / | | |||||  <((\<__>/)>>|| \  \  \_\/
                | |   | _   ||    V))_/<_>\_((V ||  \_> _.__>/\__
                 | | (sk!n)   | <\ << \<>/ ))  |       ||	\
                 : |  ||   .|    >> V>/V ((         | | :       
                 : |   |      |     >> __ <<V   .       | :
                 | |   |      |  ___ V>|_<V  ____    _/  |_|    _
                 | :   o        /\___> | <___/\__/   >|>\ __ >\
	         |o|	  _/   / /<< _|_ >> \<        _>_\>_\>o\_
               : |o|     \    \/   __><(o_><__    \     > >>>> 
                 |o|____/__   >_ __>VV<__   _/     __>  > > >>__/
                 | | /_ \__\_>>> .___<<<_<_/    \>>_____<\
      _/         |/. /\\   \_ V   />    /__ VV  \_
      \_    // _/.:: /  /  /\_\_____            /  \ /\_ __   ___/
     /\_   _/.: __/  /  /  /  /\\_ \____/     //    |\/|||
    	 \_/.::: \___/  /  /  /  /  /\\_\___   /   |o|    _ 	|
	   \ :::: /     /  /  /  /  /  /  /\\_ \___   |o|    \\_
	    / ::: /  /  /    _/	 /__/  /  /  /  /\\_  \__| |     \_\
	    \_  /  /  /  /  /__   /  /__/  /  /  /  //\_  \|_    _\\
               \ \\___/  /  /  /  /  //  /  /	 /  /  /  /\\\   \\ _
                \___\\___/  /	 /  /. /    _/__/  /  /  /  /  /:: \     \\
	         ||\  \\___/  /.:/  /  /	  /  /  /  /  /	: _/  	   \\
	         | |  _\___\_/ :/  /  /  /	 /    _/  /__/ : / //	    
  	       : | |  /_   \_ ::.\_/__/  /	/  /  /	 / .. ___\    	    
            	 | |   //    \_______ \\___/  /  /  / ___/\__\
                 |.|   /                \_ __\\/__/__/_/\__\/|\__ 
                 |o|                   _ \__    /\\/|.|    \__
		 | | _|:|   | |  ___________
|| p r o u d l y  : p r e s e n t s  |\________  |
| |\\ |________________:__________________|        | |
| |                                   				    |:|
| |                                   ...                                   | |
| |                                                                     _   | |
| |                    _________________________________________________\\__| |
|  \______________________________________________________|
 ||_____   __________  ______.______     | |
		 |:|   _| _|| _ |_ ___|_ | | |_ _/     |:|
		 | |___\__| | | | |_|| || | |_| | | || |______| |
		 |______| _ | _<|__ || ||  <| _ | _<|| |________| 
		       | | | | | | || || | | | | | || | _.._
		        |___|   |___|| || | |___| | || | <_++_>
		            	__<..>__
		            A b s t r a k t  2 0 1 4     	 