FIGURE 2. Quantitative characterization of infotaxis searches.
From the following article:
'Infotaxis' as a strategy for searching without gradients
Massimo Vergassola, Emmanuel Villermaux & Boris I. Shraiman
Nature 445, 406-409(25 January 2007)
doi:10.1038/nature05464
a, Scaling of the average search time with the initial distance to the source. The mean path of particles during their lifetime is 50. The linear scaling at large distances compares favourably with the exponential time needed to average out concentration noise. Error bars indicate s.d. b, The exponential decay of the search time probability distribution function (PDF), indicating that infotaxis is not plagued by strong fluctuations. c, The residual time to locate the source plotted against the entropy of the estimated source location PDF. The exponential dependence of the residual time indicates that reducing entropy is effective in ensuring a rapid search process.
