Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mode bifurcation on the rythmic motion of a micro-droplet under
  stationary DC electric field   Accompanied by the development of microfabrication techniques, such as MEMS
and micro-TAS, there has been increasing interests on the methodology to
generate a desired motion on a micro object in a solution environment. It is
well know that the principle to create an electric motor in a macroscopic scale
is not applicable to a micro system because of the enhancement of sticky
interaction and higher viscosity in micrometer sized system. On the other hand,
living organisms generate various motions under isothermal condition in a
well-regulated manner. Despite the past intensive studies, the underlying
mechanism of the biological molecular motors has not been unveiled yet. Under
such development stage of science and technology at the present, we are
performing the study toward real-world modeling on the emergence of regular
motion in micro system. In this paper, we report a novel experimental system on
the generation of regular movement, such as periodic go-back motion and
circular motion, for a micro object under DC electric field.

9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess