code: public static double getRadiusToBoundedness(double D, int N, double timelag, double B){
  		double cov_area = a(N)*D*timelag;
  		double radius = Math.sqrt(cov_area/(4*B));
  		return radius;
  	}
docs: Calculates the radius to a given boundedness value
  @param D Diffusion coefficient
  @param N Number of steps
  @param timelag Timelag
  @param B Boundedeness
  @return Confinement radius