Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calibration-Free Travel Time After Photobleaching Velocimetry   In interfacial science, there is an increasing need to measure flow velocity
fields at interfaces with ultrahigh spatial and temporal resolution to study
transport phenomena. Although laser-induced fluorescence photobleaching
anemometry (LIFPA) has achieved nanoscopic resolution for flow measurement, it
requires pre-calibration, which is unavailable for unknown flows. We present a
novel, calibration-free travel time after photobleaching velocimeter (TTAPV)
which can both measure fluid flow velocity and satisfy the long-anticipated
need of calibration for LIFPA.

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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph