Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Motion of an Adhesive Gel in a Swelling Gradient: a Mechanism for Cell
  Locomotion   Motivated by the motion of nematode sperm cells, we present a model for the
motion of an adhesive gel on a solid substrate. The gel polymerizes at the
leading edge and depolymerizes at the rear. The motion results from a
competition between a self-generated swelling gradient and the adhesion on the
substrate. The resulting stress provokes the rupture of the adhesion points and
allows for the motion. The model predicts an unusual force-velocity relation
which depends in significant ways on the point of application of the force.

22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg