Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-range interactions and phase defects in chains of fluid-coupled
  oscillators   Eukaryotic cilia and flagella are chemo-mechanical oscillators capable of
generating long-range coordinated motions known as metachronal waves. Pair
synchronization is a fundamental requirement for these collective dynamics, but
it is generally not sufficient for collective phase-locking, chiefly due to the
effect of long-range interactions. Here we explore experimentally and
numerically a minimal model for a ciliated surface; hydrodynamically coupled
oscillators rotating above a no-slip plane. Increasing their distance from the
wall profoundly effects the global dynamics, due to variations in hydrodynamic
interaction range. The array undergoes a transition from a traveling wave to
either a steady chevron pattern or one punctuated by periodic phase defects.
Within the transition between these regimes the system displays behavior
reminiscent of chimera states.

6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con