Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evaluating stationarity via change-point alternatives with applications
  to fMRI data   Functional magnetic resonance imaging (fMRI) is now a well-established
technique for studying the brain. However, in many situations, such as when
data are acquired in a resting state, it is difficult to know whether the data
are truly stationary or if level shifts have occurred. To this end,
change-point detection in sequences of functional data is examined where the
functional observations are dependent and where the distributions of
change-points from multiple subjects are required. Of particular interest is
the case where the change-point is an epidemic change---a change occurs and
then the observations return to baseline at a later time. The case where the
covariance can be decomposed as a tensor product is considered with particular
attention to the power analysis for detection. This is of interest in the
application to fMRI, where the estimation of a full covariance structure for
the three-dimensional image is not computationally feasible. Using the
developed methods, a large study of resting state fMRI data is conducted to
determine whether the subjects undertaking the resting scan have
nonstationarities present in their time courses. It is found that a sizeable
proportion of the subjects studied are not stationary. The change-point
distribution for those subjects is empirically determined, as well as its
theoretical properties examined.

9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph