Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Using Experimentally Calibrated Regularized Stokeslets to Assess
  Bacterial Flagellar Motility Near a Surface   The presence of a nearby boundary is likely to be important in the life cycle
and evolution of motile flagellate bacteria. This has led many authors to
employ numerical simulations to model near-surface bacterial motion and compute
hydrodynamic boundary effects. A common choice has been the method of images
for regularized Stokeslets (MIRS); however, the method requires discretization
sizes and regularization parameters that are not specified by any theory. To
determine appropriate regularization parameters for given discretization
choices in MIRS, we conducted dynamically similar macroscopic experiments and
fit the simulations to the data. In the experiments, we measured the torque on
cylinders and helices of different wavelengths as they rotated in a viscous
fluid at various distances to a boundary. We found that differences between
experiments and optimized simulations were less than 5\% when using surface
discretizations for cylinders and centerline discretizations for helices.
Having determined optimal regularization parameters, we used MIRS to simulate
an idealized free-swimming bacterium constructed of a cylindrical cell body and
a helical flagellum moving near a boundary. We assessed the swimming
performance of many bacterial morphologies by computing swimming speed, motor
rotation rate, Purcell's propulsive efficiency, energy cost per distance, and a
new metabolic energy cost defined to be the energy cost per body mass per
distance. All five measures predicted the same optimal flagellar wavelength
independently of body size and surface proximity. Although the measures
disagreed on the optimal body size, they all predicted that body size is an
important factor in the energy cost of bacterial motility near and far from a
surface.

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The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org