103 citations · 434 across the 16 of their papers we have counts for
17 papers
Natural Occurrence of Fractional Derivatives in Physics
Sverre Holm
Power laws in time and frequency appear in fields such as linear viscoelasticity and acoustics, viscous boundary layer problems, and dielectrics. This is consistent with fractional…
Simple Circuit Equivalents for the Constant Phase Element
Sverre Holm, Thomas Holm, Ørjan Grøttem Martinsen
The constant phase element (CPE) with a frequency-independent negative phase between current and voltage is used extensively in e.g. the bioimpedance and electrochemistry fields. I…
Towards a consensus on rheological models for shear waves in soft tissues
Kevin J. Parker, Thomas Szabo, Sverre Holm
A rising wave of technologies and instruments are enabling more labs and clinics to make a variety of measurements related to tissue viscoelastic properties. These instruments incl…
Restrictions on wave equations for passive media
Sverre Holm, Martin Blomhoff Holm
Most derivations of acoustic wave equations involve ensuring that causality is satisfied. Here we explore the consequences of also requiring that the medium should be passive. This…
Spring-damper equivalents of the fractional, poroelastic, and poroviscoelastic models for elastography
Sverre Holm
In MR elastography it is common to use an elastic model for the tissue's response in order to properly interpret the results. More complex models such as viscoelastic, fractional v…
Connecting the grain-shearing mechanism of wave propagation in marine sediments to fractional order wave equations
Vikash Pandey, Sverre Holm
The characteristic time-dependent viscosity of the intergranular pore-fluid in Buckingham's grain-shearing (GS) model [Buckingham, J. Acoust. Soc. Am. 108, 2796-2815 (2000)] is ide…