Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bifurcation and Nonlinear Oscillation of the Bead Motion   This research focuses on the interesting physical phenomenon of the bead-hoop
system. The bifurcation can be observed investigating the equilibrium point of
the bead, and nonlinear oscillation also occurs from the bead's motion. This
paper includes the theoretical investigation by setting the quantitative model
and studying pitchfork bifurcation. Also, the equation of motion is derived by
investigating resistance. Three parts of experiments were done and went through
analysis by examining standard error, error of experiment, and the error of
fitting.

0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg