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. 2017 Sep 18;12(9):e0184980. doi: 10.1371/journal.pone.0184980

Fig 3. Changes in walker numbers and environmental factors (dust particle numbers) in the underground pedestrian space.

Fig 3

(A) Changes in walker numbers. (B) Changes in particle numbers (particle size Δ0.5: 0.3–0.5μm). (C) Changes in numbers of particles (particle size Δ1.0: 0.5–1.0μm). (D) Changes in numbers of particles (particle size Δ5.0: 1.0–5.0μm). Left and right panels show daily and monthly changes, respectively. Asterisks indicate a significant difference (p<0.05) between bars connected by lines.