Sverre Holm
I am a professor of acoustic imaging and signal processing at the University of Oslo and an elected member of the Norwegian Academy of Technological Sciences. Jointly with the Digital Signal Processing and Image Analysis group we are part of "Centre for Innovative Ultrasound Solutions (CIUS)"  a centre for researchbased innovation.
My main interest is to understand the physics of wave propagation in complex media like biological tissue. Cosmologist and astrophysicist Martin Rees says:
We can expect huge advances on three frontiers: the very small, the very large, and the very complex
More specifically I want to understand why wave propagation in complex media in medical ultrasound and elastography often results in power law frequency characteristics (attenuation and dispersion), and to uncover the physical basis for noninteger (fractional) derivative descriptions of waves  if indeed there is one.
From time to time I am on the panel of the popular national radio show NRK P2, "Tower of Abel" answering questions on acoustics in a wide sense and sometimes commenting on the history/philosophy of science. I have blogged since 2010, mainly in Norwegian, and some in English.
Apart from that I probably have too many interests. That includes history and philosophy of science, loudspeakers/audio coding, and amateur radio.
Books

"Waves with PowerLaw Attenuation," 2019, Springer and ASA Press.

Review:

“In my opinion it is well written and it is highly readable with technical details under control. I have highly appreciated the idea of integrating several ideas from physical acoustics with those from linear viscoelasticity." G. Saccomandi, Math Rev, Nov 2019


YouTube channel with lectures on the Physics of Fractional (Noninteger) Derivatives.


"The imagined conflict: On science and God", Oct. 2021, in Norwegian.

Blog: Den innbilte konflikten. Try the translation menu in the upper righthand corner. It works surprisingly well!
Research

Invited presentations at Acoust. Soc. America Conf, SIAM Am. Inst. Ultrasound in Med etc in recent years

Member of editorial board of Fractional Calculus and Applied Analysis and Progress in Fractional Differentiation and Applications
 Member of Scientific Committee of the Indoor Positioning and Indoor Navigation Conference 20122017. In 2012 and 2013 I also lead industry panel debates at the IPIN conferences
Presentations for download
 Lecture notes: "Acoustic wave equations and four ways media may perturbe the speed of sound," 2022.
 Differential arrays (IN5450)  from cardioid microphones to Yagi antennas (2020)
 Abel’s 1823 Paper on Fractional Derivatives, 27 Feb 2020
 Second harmonic imaging in active sonar (2016)
 Fractional derivatives (2016)
 Fascinating wave phenomena: Where Newton and Hooke fall short (2016)
 Processing the data twice: Minimum variance as an alternative to geometrybased beamforming (2016)
 Long delayed radio echoes – the illusive secret of the ionosphere (2021) first heard in Oslo in 1927.
 Youtube presentation at HamSci 2021.
 See also these pages which Wikipedia refers to:
 The Art of Writing a Scientific Paper (2015).
 See also blog with same title.
 Experience with sparse arrays (2007)
 Limited diffraction beams and a new decomposition of arbitrary annular beams (2002)
Demos and Software
 The best demonstration of a fractional derivative physical device is capacitor soakage or dielectric absorption: YouTube video.
 Some videos showing the fractional derivative of functions developed by former PhD student Vikash Pandey.
 Interactive program, Ultrasim, a Matlab toolbox for ultrasound field simulation.
 Magnitude squared coherence analysis software (Climate data).
The publication list from the database Cristin is not always so useful as it seems to be unable to distinguish between publications from several persons with the same name as me. Therefore it may be better to use my own list, Google Scholar, or ORCID.
Publications
Most cited papers
 J.F. Synnevåg, A. Austeng, and S. Holm, "Adaptive beamforming applied to medical ultrasound imaging," IEEE Trans. Ultrason., Ferroelect., Freq. Contr. (Special issue on high resolution ultrasonic imaging), vol. 54(8), Aug. 2007, pp. 16061613.
 W. Chen and S. Holm, "Fractional Laplacian timespace models for linear and nonlinear lossy media exhibiting arbitrary frequency dependency," J. Acoust. Soc. Amer., pp. 14241430, Apr. 2004.
 J.F. Synnevåg, A. Austeng, and S. Holm, ”Benefits of MinimumVariance Beamforming in Medical Ultrasound Imaging”, IEEE Trans. Ultrason., Ferroelect., Freq. Contr., Sept. 2009.
 A. Austeng and S. Holm, "Sparse 2D Arrays for 3D Phased Array Imaging  Design Methods," IEEE Trans. Ultrasonics, Ferroelectrics and Frequency Control, Aug. 2002, pp. 10731086.
 W. Chen and S. Holm, "Modified Szabo’s wave equation models for lossy media obeying frequency power law," J. Acoust. Soc. Amer., pp. 25702574, Nov. 2003.

Chandrasekaran, Sri Nivas; Näsholm, Sven Peter & Holm, Sverre (2022). Wave equations for porous media described by the Biot model. Journal of the Acoustical Society of America. ISSN 00014966. 151(4), p. 2576–2586. doi: 10.1121/10.0010164. Full text in Research Archive

Svensson, Siri Fløgstad; Fuster i Garcia, Elies; Latysheva, Anna; FraserGreen, Jorunn; Nordhøy, Wibeke & Darwish, Omar Isam [Show all 11 contributors for this article] (2021). Decreased tissue stiffness in glioblastoma by MR elastography is associated with increased cerebral blood flow. European Journal of Radiology. ISSN 0720048X. 147. doi: 10.1016/j.ejrad.2021.110136. Full text in Research Archive

Aparicio, Joaquin & Holm, Sverre (2021). Obtaining range measurements from ambient noise crosscorrelations for the selfcalibration of nodes. CEUR Workshop Proceedings. ISSN 16130073. 3097. Full text in Research Archive

Lino, Paolo; Maione, Guido; Garrappa, Roberto & Holm, Sverre (2021). An approach to optimal integer and fractionalorder modeling of electroinjectors in compressionignition engines. Control Engineering Practice. ISSN 09670661. 115(104890). doi: 10.1016/j.conengprac.2021.104890.

Svensson, Siri Fløgstad; De Arcos, José; Darwish, Omar Isam; FraserGreen, Jorunn; Storås, Tryggve & Holm, Sverre [Show all 9 contributors for this article] (2021). Robustness of MR Elastography in the Healthy Brain: Repeatability, Reliability, and Effect of Different Reconstruction Methods. Journal of Magnetic Resonance Imaging. ISSN 10531807. 53(5), p. 1510–1521. doi: 10.1002/jmri.27475. Full text in Research Archive

Holm, Sverre; Holm, Thomas & Martinsen, Ørjan Grøttem (2021). Simple circuit equivalents for the constant phase element. PLOS ONE. ISSN 19326203. 16(3). doi: 10.1371/journal.pone.0248786. Full text in Research Archive

Fang, Jun; Näsholm, Sven Peter; Chen, Wen & Holm, Sverre (2020). The fractional constitutive models for nonlocal material based on scattering wave equations. Mechanics of TimeDependent Materials. ISSN 13852000. doi: 10.1007/s1104302009482w.

Holm, Sverre (2020). Time domain characterization of the ColeCole dielectric model. Journal of Electrical Bioimpedance. ISSN 18915469. 11(1), p. 101–105. doi: 10.2478/JOEB20200015. Full text in Research Archive Show summary

Yang, Xu; Cai, Wei; Liang, Yingjie & Holm, Sverre (2020). A novel representation of timevarying viscosity with powerlaw and comparative study. International Journal of NonLinear Mechanics. ISSN 00207462. 119, p. 1–10. doi: 10.1016/j.ijnonlinmec.2019.103372.

Esmonde, Harry & Holm, Sverre (2020). Fractional derivative modelling of adhesive cure. Applied Mathematical Modelling. ISSN 0307904X. 77(2), p. 1041–1053. doi: 10.1016/j.apm.2019.08.021.

Holm, Sverre (2019). Dispersion analysis for wave equations with fractional Laplacian loss operators. Fractional Calculus and Applied Analysis. ISSN 13110454. 22(6), p. 1596–1606. doi: 10.1515/fca20190082.

Parker, Kevin; Szabo, Thomas & Holm, Sverre (2019). Towards a consensus on rheological models for elastography in soft tissues. Physics in Medicine and Biology. ISSN 00319155. 64(21). doi: 10.1088/13616560/ab453d. Show summary

Chandrasekaran, Sri Nivas & Holm, Sverre (2019). A multiple relaxation interpretation of the extended Biot model. Journal of the Acoustical Society of America. ISSN 00014966. 146(1), p. 330–339. doi: 10.1121/1.5116139.

Kvam, Johannes; Holm, Sverre & Angelsen, Bjørn Atle Johan (2019). Exploiting Ballou's rule for better tissue classification. Journal of the Acoustical Society of America. ISSN 00014966. 145(4), p. 2103–2112. doi: 10.1121/1.5096533.

Patz, Samuel; Fovargue, Daniel; Schregel, Katharina; Nazari, Navid; Palotai, Miklos & Barbone, Paul E. [Show all 12 contributors for this article] (2019). Imaging localized neuronal activity at fast time scales through biomechanics. Science Advances. ISSN 23752548. 5(4). doi: 10.1126/sciadv.aav3816.

Holm, Sverre (2021). Den innbilte konflikten. Om naturvitenskap og Gud. Veritas forlag. ISBN 9788283850369. 359 p.

Holm, Sverre (2019). Waves with PowerLaw Attenuation. Springer Nature. ISBN 9783030149277. 312 p. Show summary

Holm, Sverre (2022). Gud og vitenskap – Kan jeg tro på begge deler?

Holm, Sverre (2022). En innbilt konflikt mellom naturvitenskap og gudstro?

Holm, Sverre (2022). Gode grunner til at konflikten mellom vitenskap og Gud er innbilt.

Aparicio, Joaquin; Thio, Vincent Martello Kwie Hoe & Holm, Sverre (2022). Range evaluation between indoor microphones obtained from acoustic ambient noise crosscorrelations.

Holm, Sverre (2021). Naturvitenskap og Gud er ikke konkurrenter. Dagen : kristelig dagblad. ISSN 08054738.

Holm, Sverre (2021). – Trist at folk tror det er en konflikt mellom tro og vitenskap. [Newspaper]. Vårt Land. Show summary

Kvellestad, Anders; Normann, Ben David & Holm, Sverre (2021). Om Gud, fysikk og de dype spørsmålene. Avisa Vårt land. Show summary

Holm, Sverre (2021). The Roots of Mathematics and Natural Laws: Materialism vs Theism.

Holm, Sverre (2021). Hensikt eller tilfeldighet?

Holm, Sverre (2021). Gode grunner til at naturvitenskap og Gud ikke er i konflikt.

Holm, Sverre (2021). Fractionality in timevarying systems.

Holm, Sverre (2021). Fractional wave equations appear naturally in complex media.

Aparicio, Joaquin & Holm, Sverre (2021). Evaluation of acoustic ambient noise crosscorrelations in indoor environments.

Holm, Sverre (2021). Noninteger derivatives in selected areas of physics.

Holm, Sverre (2021). Noninteger derivatives in acoustics and other areas of physics.

Holm, Sverre (2021). Lysloven på Kanariøyene.

Holm, Sverre (2021). Long delayed radio echoes – the illusive secret of the ionosphere. Show summary

Holm, Sverre (2020). Justification for power laws and fractional models.

Holm, Sverre (2020). Powerlaws and fractional calculus.

Holm, Sverre (2020). Waves with PowerLaw Attenuation.

Holm, Sverre (2020). Abel’s 1823 Paper on Fractional Derivatives and Waves with PowerLaw Attenuation. Show summary

Chandrasekaran, Sri Nivas & Holm, Sverre (2019). Erratum: A multiple relaxation interpretation of the extended Biot model (Journal of the Acoustical Society of America (2019) 146 (330339) DOI: 10.1121/1.5116139). Journal of the Acoustical Society of America. ISSN 00014966. 146(6), p. 4322–4323. doi: 10.1121/1.5139414.

Aparicio, Joaquin; Alvarez, Fernando; Hernandez, Alvaro & Holm, Sverre (2019). A review of techniques for ultrasonic indoor localization systems.

Holm, Sverre (2019). Troende naturforskere gjennom 400 år ved seks av dem.

Holm, Sverre (2019). Troende naturforskere gjennom 400 år ved seks av dem.

Holm, Sverre (2019). Er naturvitenskap Teorien om Alt?

Holm, Sverre (2019). Troende naturforskere gjennom 400 år ved åtte av dem.

Holm, Sverre (2019). Evolusjon og klassisk kristen tro. Teistisk evolusjon ‐ Evolusjonær kreasjonisme.