Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenotyping OSA: a time series analysis using fuzzy clustering and
  persistent homology   Sleep apnea is a disorder that has serious consequences for the pediatric
population. There has been recent concern that traditional diagnosis of the
disorder using the apnea-hypopnea index may be ineffective in capturing its
multi-faceted outcomes. In this work, we take a first step in addressing this
issue by phenotyping patients using a clustering analysis of airflow time
series. This is approached in three ways: using feature-based fuzzy clustering
in the time and frequency domains, and using persistent homology to study the
signal from a topological perspective. The fuzzy clusters are analyzed in a
novel manner using a Dirichlet regression analysis, while the topological
approach leverages Takens embedding theorem to study the periodicity properties
of the signals.

18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci