Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Aging-Induced Dynamics for Statically Indeterminate System   Statically indeterminate systems are experimentally demonstrated to be in
fact dynamical at the microscopic scale. Take the classic ladder-wall problem,
for instance. Depending on the Young's modulus of the wall, it may take up to
twenty minutes before its weight saturates. This finding is shown to be shared
by other statically indeterminate systems, such as a granule silo and a beam
with three support points. We believe that the aging effect is responsible for
this surprising phenomenon because it can be correlated with the evolution of
microscopic contact area with the wall and floor. Finally, a heuristic and
simple method is introduced that can uniquely determine and analytically solve
the saturated weight without invoking detailed material properties.

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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: physics
17
The categories of this paper are: q-fin
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The categories of this paper are: cs
28
The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: math