Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heterogeneity, and the secret of the sea   This paper explores tools for modeling and measuring the compositional
heterogeneity of a rock, or other solid specimen. Intuitive ``variation per
decade'' plots, simple expressions for containment probability, generalization
for familiar error-in-the-mean expressions, and a useful dimensionless sample
bias coefficient all emerge from the analysis. These calculations have also
inspired subsequent work on log-log roughness spectroscopy (with applications
to scanning probe microscope data), and on angular correlation mapping of
lattice fringe images (with applications in high resolution transmission
electron microscopy). It was originally published as Appendix E of a
dissertation on ``Microcharacterization of interplanetary dust collected in the
earth's stratosphere''.

19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg