Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Computing the elastic mechanical properties of rod-like DNA
  nanostructures   To study the elastic properties of rod-like DNA nanostructures, we perform
long simulations of these structure using the oxDNA coarse-grained model. By
analysing the fluctuations in these trajectories we obtain estimates of the
bend and twist persistence lengths, and the underlying bend and twist elastic
moduli and couplings between them. Only on length scales beyond those
associated with the spacings between the interhelix crossovers do the bending
fluctuations behave like those of a worm-like chain. The obtained bending
persistence lengths are much larger than that for double-stranded DNA and
increase non-linearly with the number of helices, whereas the twist moduli
increase approximately linearly. To within the numerical error in our data, the
twist-bend coupling constants are of order zero. That the bending persistence
lengths we obtain are generally somewhat higher than in experiment probably
reflects both that the simulated origami have no assembly defects and that the
oxDNA extensional modulus for double-stranded DNA is too large.

32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph