English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report a comparative analysis of the classical theory of the viscous mechanism of sound attenuation by ultrafine media and one of the dominant theories of sound attenuation © CC BY Курилов А. Д., Соколов В. В., Эминов П. А., 2019. ISSN 2072-8387 Вестник Московского государственного областного университета. Серия: Физика-Математика 2019 / No 4 61 anisotropy by magnetic fluids on the basis of the viscous mechanism. The Taketomi theory used by many authors gives overestimated values for the size of aggregates in magnetic fluids and is not able to quantify experimental data. In addition, the formula obtained by Taketomi does not reduce to the classical expression for viscous absorption in the limiting case and, therefore, should be considered erroneous.

VISCOUS MECHANISM IN THE THEORY OF ULTRASOUND ATTENUATION ANISOTROPY BY MAGNETIC FLUIDS