Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of Iron Losses on Switching Dynamics of an Electromagnet from
  Experiment and Simulation   The switching behaviour of electromagnets is determined by the inertia of the
armature, the stiffness of the return spring and the magnetostatic forces
between armature and yoke. For highly dynamic systems, hysteresis and eddy
current losses have a slowing effect. In this paper we consider the
experimentally observed behaviour of a switching magnet and compare it with
simulation results including hysteresis and eddy current losses.

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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org