Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective dynamics and self-organization of active particles on random
  networks   Collective cell migration in 3D extracellular matrix (ECM) is crucial to many
physiological and pathological processes. Migrating cells can generate active
pulling forces via actin filament contraction, which are transmitted to the ECM
fibers and lead to a dynamically evolving force network in the system. Here, we
elucidate the role of such force network in regulating collective cell
behaviors using a minimal active-particle-on-network (APN) model, in which
active particles can pull the fibers and hop between neighboring nodes of the
network following local durotaxis. Our model reveals a dynamic transition as
the particle number density approaches a critical value, from an "absorbing"
state containing isolated stationary small particle clusters, to a "active"
state containing a single large cluster undergone constant dynamic
reorganization. This reorganization is dominated by a subset of highly dynamic
"radical" particles in the cluster, whose number also exhibits a transition at
the same critical density. The transition is underlaid by the percolation of
"influence spheres" due to the particle pulling forces. Our results suggest a
robust mechanism based on ECM-mediated mechanical coupling for collective cell
behaviors in 3D ECM.

18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol