Foto: Kai Mørk Mortensen
Alfred Hanssen
Professor i geofysikk
- Romeyn, Rowan Peter; Hanssen, Alfred; Köhler, Andreas. Long-term analysis of cryoseismic events and associated ground thermal stress in Adventdalen, Svalbard. The Cryosphere 2022; Volum 16. ISSN 1994-0416.s 2025 - 2050.s doi: 10.5194/tc-16-2025-2022.
- Romeyn, Rowan; Hanssen, Alfred; Köhler, Andreas. Long term analysis of cryoseismic events and associated ground thermal stress in Adventdalen, Svalbard. (data) The Cryosphere Discussions 2021. ISSN 1994-0432.
- Romeyn, Rowan; Hanssen, Alfred; Ruud, Bent Ole; Johansen, Tor Arne. Sea ice thickness from air-coupled flexural waves. The Cryosphere 2021; Volum 15 (6). ISSN 1994-0416.s 2939 - 2955.s doi: 10.5194/tc-15-2939-2021.
- Lasabuda, Amando Putra Ersaid; Johansen, Nora Johanne Synnestvedt; Laberg, Jan Sverre; Faleide, Jan Inge; Senger, Kim; Rydningen, Tom Arne; Patton, Henry; Knutsen, Stig-Morten; Hanssen, Alfred. Cenozoic uplift and erosion of the Norwegian Barents Shelf – A review. Earth-Science Reviews 2021; Volum 217. ISSN 0012-8252.s doi: 10.1016/j.earscirev.2021.103609.
- Romeyn, Rowan; Hanssen, Alfred; Ruud, Bent Ole; Stemland, Helene Meling; Johansen, Tor Arne. Passive seismic recording of cryoseisms in Adventdalen, Svalbard. The Cryosphere 2021; Volum 15. ISSN 1994-0416.s 283 - 302.s doi: 10.5194/tc-15-283-2021.
- Khodabandeloo, Babak; Landrø, Martin; Hanssen, Alfred. Acoustic generation of underwater cavities - Comparing modeled and measured acoustic signals generated by seismic air gun arrays. Journal of the Acoustical Society of America 2017; Volum 141 (4). ISSN 0001-4966.s 2661 - 2672.s doi: 10.1121/1.4979939.
- Birkelund, Yngve; Johansen, Jarle André; Hanssen, Alfred. High-precision surrogate data based tests for Gaussianity and linearity of discrete time random processes. European Signal Processing Conference 2015; Volum 06-10-September-2004:7079994. ISSN 2076-1465.s 73 - 76.s doi: 10.1016/j.sigpro.2009.04.013.
- Eltoft, Torbjørn; Doulgeris, Anthony Paul; Brekke, Camilla; Solbø, Stian; Gerland, Sebastian; Hanssen, Alfred. Imaging Sea Ice Structure by Remote Sensing Sensors. (data) Proceedings - International Conference on Port and Ocean Engineering under Arctic Conditions 2015; Volum 2015-January. ISSN 0376-6756.
- Øigård, Tor Arne; Hanssen, Alfred; Hansen, Roy Edgar. The Multivariate Normal Inverse Gaussian distribution: EM-estimation and analysis of synthetic aperture sonar data. European Signal Processing Conference 2015; Volum 06-10-September-2004. ISSN 2076-1465.s 1433 - 1436.s doi: 10.1109/icassp.2002.5744895.
- Hanssen, Alfred; Larsen, Yngvar; Scharf, Louis L.. Complex time-frequency and dual-frequency spectra of harmonizable processes. European Signal Processing Conference 2015; Volum 06-10-September-2004. ISSN 2076-1465.s 1577 - 1580.
- Sanchis, Charlotte Juliette; Hanssen, Alfred. Sparse code shrinkage for signal enhancement of seismic data. Geophysics 2011; Volum 76 (6). ISSN 0016-8033.s V137 - V153.s doi: 10.1190/GEO2010-0128.1.
- Sanchis, Charlotte Juliette; Hanssen, Alfred. Enhanced local correlation stacking method. Geophysics 2011; Volum 76 (3). ISSN 0016-8033.s V33 - V45.s doi: 10.1190/1.3552687.
- Sanchis, Charlotte Juliette; Hanssen, Alfred. Multiple-input adaptive seismic noise canceller for the attenuation of nonstationary coherent noise. Geophysics 2011; Volum 76 (6). ISSN 0016-8033.s V139 - V150.s doi: 10.1190/GEO2010-0367.1.
- Hanssen, Alfred. PART I: FUNDAMENTAL ISSUES IN ARRAY SIGNAL PROCESSING. (data) John Wiley & Sons 2010 ISBN 978-0-470-37176-3.s 11 - 28.
- Birkelund, Yngve; Hanssen, Alfred. Improved bispectrum based tests for Gaussianity and linearity. Signal Processing 2009; Volum 89 (12). ISSN 0165-1684.s 2537 - 2546.s doi: 10.1016/j.sigpro.2009.04.013.
- Hanssen, Alfred; Holten, Terje; Flekkøy, Eirik Grude; Singer, Bension; Blixt, Erik Mårten; Måløy, Knut Jørgen. Vertical source, vertical receiver, electromagnetic technique for offshore hydrocarbon exploration. (data) First Break 2009; Volum 27 (May). ISSN 0263-5046.s 89 - 93.
- Hindberg, Heidi; Hanssen, Alfred; Olhede, Sofia. Thresholding the ambiguity function. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing 2008. ISSN 1520-6149.s 3773 - 3776.s doi: 10.1109/ICASSP.2008.4518474.
- Salberg, Arnt-Børre; Hanssen, Alfred; Scharf, Louis. Robust multidimensional matched subspace classifiers based on weighted least-squares. IEEE Transactions on Signal Processing 2007; Volum 55 (3). ISSN 1053-587X.s 873 - 880.s doi: 10.1109/TSP.2006.887560.
- Olsmo Sæbø, Torstein; Hansen, Roy E.; Hanssen, Alfred. Relative Height Estimation by Cross-correlating Ground Range Synthetic Aperture Sonar Images. IEEE Journal of Oceanic Engineering 2007; Volum 32 (4). ISSN 0364-9059.s 971 - 982.s doi: 10.1109/JOE.2007.895244.
- Hindberg, Heidi; Hanssen, Alfred. Generalized Spectral Coherences for Complex-Valued Harmonizable Processes. IEEE Transactions on Signal Processing 2007; Volum 55 (6). ISSN 1053-587X.s 2407 - 2413.s doi: 10.1109/TSP.2007.893932.
- Schreier, Peter; Scharf, Louis; Hanssen, Alfred. A Statistical Test for Impropriety of Complex Random Signals. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing 2006. ISSN 1520-6149.s III-796 - III-799.s doi: 10.1109/ICASSP.2006.1660774.
- ØigÅrd, Tor Arne; Hanssen, Alfred; Scharf, Louis L.. Spectral correlations of fractional Brownian motion. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics 2006; Volum 74. ISSN 1539-3755.s doi: 10.1103/PhysRevE.74.031114.
- Hadziavdic, Vedad; Melandsø, Frank; Hanssen, Alfred. Particle tracking from image sequences of complex plasma crystals. Physics of Plasmas 2006; Volum 13. ISSN 1070-664X.s doi: 10.1063/1.1993548.
- Schreier, Peter; Scharf, Louis; Hanssen, Alfred. A generalized likelihood ratio test for impropriety of complex signals. IEEE Signal Processing Letters 2006; Volum 13 (7). ISSN 1070-9908.s 433 - 436.s doi: 10.1109/LSP.2006.871858.
- Salberg, Arnt-Børre; Hanssen, Alfred. A subspace theory for differential chaos-shift keying. IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 2006; Volum 53 (1). ISSN 1057-7130.s 51 - 55.s doi: 10.1109/TCSII.2005.854590.
- Øigård, Tor Arne; Hanssen, Alfred; Hansen, Roy E.; Godtliebsen, Fred. EM-estimation and modeling of heavy-tailed processes with the multivariate normal inverse Gaussian distribution. Signal Processing 2005; Volum 85. ISSN 0165-1684.s doi: 10.1016/j.sigpro.2005.03.0.
- Scharf, Louis; Schreier, Peter; Hanssen, Alfred. The Hilbert space geometry of the Rihaczek distribution for stochastic analytic signals. IEEE Signal Processing Letters 2005; Volum 12 (4). ISSN 1070-9908.s 297 - 300.s doi: 10.1109/LSP.2005.843772.
- Salberg, Arnt-Børre; Hanssen, Alfred. Stochastic mulitpulse-PAM: a subspace modulation technique with diversity. Signal Processing 2003; Volum 83 (12). ISSN 0165-1684.s 2559 - 2577.
- Birkelund, Yngve; Hanssen, Alfred; Powers, Edward. Multitaper estimation of polyspectra. Signal Processing 2003; Volum 83. ISSN 0165-1684.s 545 - 559.
- Birkelund, Yngve; Hanssen, Alfred; Powers, Edward. On the estimation of nonlinear Volterra models in offshore engineering. International Journal of Offshore and Polar Engineering 2003; Volum 13 (1). ISSN 1053-5381.s 12 - 20.
- Hanssen, Alfred; Scharf, Louis. A theory of polyspectra for nonstationary stochastic processes. IEEE Transactions on Signal Processing 2003; Volum 51 (5). ISSN 1053-587X.s 1243 - 1252.
- Larsen, Yngvar; Hanssen, Alfred; Krane, Bård; Pecseli, Hans L.; Trulsen, Jan. Time-resolved statistical analysis of non-linear electrostatic fluctuations in the ionospheric E-region. Journal of Geophysical Research (JGR) 2002; Volum 107 (1). ISSN 0148-0227.s doi: 10.129/2001JA900125.
- Salberg, Arnt Børre; Hanssen, Alfred. Stochastic process shift keying: A novel modulation method for secure digital communications. (fulltekst) European Signal Processing Conference 2000 (March). ISSN 2076-1465.
- Hanssen, Alfred. Multidimensional Multitaper Spectral Estimation. Signal Processing 1997; Volum 58. ISSN 0165-1684.s 327 - 332.
- Olsen, O. M.; Rypdal, Kristoffer; Hanssen, Alfred; Pecseli, Hans L.. Experimental Study of Low -Frequency Electrostatic Fluctuations in a Simple Magnetized Torus. Bulletin- American Physics Societe 1997; Volum II (42).s 2048 - .
- Mjølhus, Einar; Hanssen, Alfred; DuBois, Donald F.. Radiation from electromagnetically driven Langmuir turbulence. Journal of Geophysical Research (JGR) 1995; Volum 100. ISSN 0148-0227.s 17527 - 17541.
- Hanssen, Alfred; Pecseli, Hans L.; Stenflo, Lennart; Trulsen, Jan. Nonlinear Langmuir waves in a two-electron plasma. Journal of Plasma Physics 1994; Volum 51. ISSN 0022-3778.s 423 - 432.
- DuBois, Donald F.; Hanssen, Alfred; Rose, Harvey A.; Russell, David. Excitation of strong Langmuir turbulence in the ionosphere: comparison of theory and experiment. Physics of Fluids 1993; Volum 5. ISSN 1070-6631.s 2616 - 2622.
- DuBois, Donald F.; Hanssen, Alfred; Rose, Harvey A.; Russell, David. Space and time distribution of HF excited Langmuir turbulence in the ionosphere. Journal of Geophysical Research (JGR) 1993; Volum 98. ISSN 0148-0227.s 17543 - 17568.
- DuBois, Donald F.; Hanssen, Alfred; Rose, Harvey A.. Comment on ``Langmuir turbulence and ionospheric modification'' by P.Stubbe, H.Kohl, and M.T. Rietveld. Journal of Geophysical Research (JGR) 1992; Volum 97. ISSN 0148-0227.s 15059 - 15066.
- Hanssen, Alfred; Mjølhus, Einar; DuBois, Donald F.; Rose, Harvey A.. Numerical test of the weak turbulence approximation to ionospheric Langmuir turbulence. Journal of Geophysical Research (JGR) 1992; Volum 97. ISSN 0148-0227.s 12073 - 12091.
- Hanssen, Alfred. Resonance broadening modification of weak plasma turbulence theory. Journal of Geophysical Research (JGR) 1991; Volum 96. ISSN 0148-0227.s 1867 - 1871.
Forskningsinteresser
Geophysics
Statistical signal processing
Data analytics
Numerical simulation
Computational physics
Nonlinear dynamics
Undervisning
Presently:
- GEO-2011 GIS and geostatistics
- GEO-2013 GeoPraksis
- GEO-3138/8138 Integrated geological and geophysical interpretation
- AG-335/AG-835 Arctic seismic exploration (UNIS)
In the past:
- FYS-1006 Introduction to signals and sensors
- FYS-2006 Signal processing
- FYS-2007 Statistical signal processing
- FYS-3011 Detection theory
- FYS-3012 Pattern recognition
- FYS-3014 Digital communication
- FYS-3027 Geothermal energy
- GEO-3123 Marine geophysics
- GEO-3126 Practical seismic data processing
- AT-390 Geotechnical investigations using ground penetrating radar (UNIS)