Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fractal noise maps reveal human brain activity: a key for unbiased fMRI
  analysis   Brain metabolism is controlled by complex regulation mechanisms. As part of
their nature many complex systems show scaling behavior in their timeseries
data. Corresponding scaling exponents can sometimes be used to characterize
these systems. Here we present maps of scaling exponents derived from BOLD
functional Magnetic Resonance Imaging (fMRI) data, and show that they reveal
activation patterns in the human brain with very high precision. In contrast to
standard model-based analysis we use no prior knowledge on the experimental
stimulation paradigm for extracting activation patterns from fMRI timeseries.
We demonstrate that mental activity is one-to-one related to large fractal
exponents, or equivalently, to temporally highly correlated processes.

25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
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The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th