Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Aversion of face-to-face situation of pedestrians eases crowding
  condition   We conducted numerical simulation for a crowd of pedestrians. Each
pedestrian, modeled with three circles, has a shape whose long axis is
perpendicular to the anteroposterior axis, and is designed to move fixed
destination. The pedestrians have friction at the surface and soft repulsion.
In this study, we newly introduced an active rotation which captures
psychological effect to evade face-to-face situation. The numerical simulation
revealed that active rotation induces fluidization of system leading to higher
flux of pedestrian. We further confirmed that this fluidization is due to
fragmentation of force chain induced by the active rotation.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat