Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological modeling of the motility of self-propelled
  microorganisms   The motility of microorganisms in liquid media is an important issue in
active matter and it is not yet fully understood. Previous theoretical
approaches dealing with the microscopic description of microbial movement have
modeled the propelling force exerted by the organism as a Gaussian white noise
term in the equation of motion. We present experimental results for ciliates of
the genus Colpidium, which do not agree with the Gaussian white noise
hypothesis. We propose a new stochastic model that goes beyond such assumption
and displays good agreement with the experimental statistics of motion, such as
velocity distribution and velocity autocorrelation.

22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph