Sven Þ. Sigurðsson, professor emeritus of computational science

Born: June 26 1945

Education:

B.Sc.Hons. in pure and applied mathematics, University of St. Andrews, Scotland 1968.
M.Sc. in numerical analysis, University of Dundee, Scotland 1970.
Ph.D. in numerical analysis, University of Dundee, Scotland 1973

 Occupation:

1971-72 Assistant lecturer Institutionen för Informationsbehandling, Chalmers Tekniska Högskola, Gothenburg, Sweden.
1972-75 Research scientist, Computing Centre, Science Institute, University of Iceland
1975-78 Research scientist, Division of Geothermal Energy, National Energy Authority, Iceland
1978-99 Associate professor, Department of Mathematics, Faculty of Science, University of Iceland
1999      Professor, Department of Mathematics, Faculty of Science, University of Iceland 
2000-08 Professor, Department of Computer Science, Faculty of Engineering, University of Iceland

2008      Professor, Department of Computer Science, Faculty of Industrial Engineering, Mechanical Engineering and Computer

             Science, School of Engineering and Natural Science, University of Iceland

2012-17 Retired. Professor emeritus, Faculty of Industrial Engineering, Mechanical Engineering and Computer

             Science, School of Engineering and Natural Science, University of Iceland

 

Research leaves:

Department of Computer Science, University of Waterloo, Canada, Feb. - August 1982
Department of Mathematics, Imperial College, Univ. of London, August 1988-July 1989
Mittag-Leffler Institutet, Djursholm, Sweden, April 1998
Istitituttet för Informatik, Bergens Universitet, Norway, Oct. 1998

Danmarks Meteorologiske Institut, Copenhagen, Denmark, March and April 2005

Department of Mathematics, University of California, Santa Barbara, March 2009

Department of Earth Sciences, Simon Fraser University, Vancouver, Canada, May 2012

 

 

Main research activities:

 

1.  Finite element modelling related to shallow-water flow, contaminant and sediment transport, and glacier flow.

I have worked on projects within this area since around 1980, mainly in cooperation with Snorri Páll Kjaran and Sigurður Lárus Hólm of  Vatnaskil Consulting Engineers. These have mainly related to the development of two software packages AQUA3D, a three dimensional groundwater flow and contamination transport modelling package, and AQUASEA, a modelling package for two-dimensional estuary flow, coastal flow and lake circulation and contaminant transport problems, both based on a finite element Galerkin approach. I have also advised them on numerical approaches to a number of specific modelling tasks involving reservoirs, lakes, estuaries, fjords, and rivers in Iceland. Publications 8, 11, and 13-17 in the list below below describe some of the numerical issues involved, and the recent confernce publication 61 also relates to this type of work. My involvement in Publication 65 also relates to this type of research.

In 2006 I adapted the shallow water code to two-dimensional glacier flow modelling in cooperation with the research group headed by Helgi Björnsson, research professor at the Earh Sciences Institute of University of Iceland, and the glaciologist Guðfinna Aðalgeirsdóttir, presently an associate professor at the Faculty of Earth Sciences, University of Iceland. Publications 56 and 64 are linked to this work. In 2009 I started the development of a new finite element model to simulate waterflow under glaciers, incorporating both sheet flow and tunnel flow, in cooperation with Þröstur Þorsteinsson, glaciologist at the Earh Sciences Institute of University of Iceland. This model that is linked with the glacier flow model makes use of the model developed by Glen Flowers, at Simon Fraser University, Vancouver, the main difference being the adaption to an irregular triangur network, as well as making use of the flexibility this offers in modelling channels along interelemental boundaries. However, a similar development has been carried out by Mauro Werder, at Simon Fraser University, and Christian Schoof and Ian Hewitt at University Of British Columbia, Vancouver, as became apparent after a visit to Simon Fraser University in May 2012.

2. Modeling of fish migration using particle and continuous models.

My involvement in this research started in 2000 in cooperation with the late Kjartan G. Magnusson, professor of mathematics at University of Iceland. It started as a subproject of a more general European project, Development of structurally detailed statistically testable modelsof marine populations, that was coordinated by Gunnar Stefansson of  The Marine Research Institute and University of Iceland, and lasted till the autumn of 2004. The main emphasis in the project was to set up various simulation models for the migration of pelagic species of fish, focusing on migration patterns of capelin in the seas around Iceland and in the Barents Sea. The models were two-dimensional in space, both discrete and continuous, where in the latter case the continuous function could either represent real density or probability density. Publications 22, 24-25, and 28-30 in the list below resulted from this work. Kjartan Magnusson died in January 2006, but I carried on with this research in cooperation with Bjorn Birnir, professor of mathematics at University of California, Santa Barbara, where the focus was more on dynamical properties of these models. Moreover we incorporated into the models ideas from so-called dynamic energy budget (DEB) models developed by Bas Kooijman and his co-workers. Baldvin Einarsson worked on this project as a Ph.D.-student under our supervision and defended his Ph.D-thesis in April 2011. Publications 48, 50, 53 and 58 in the list below have resulted from this work.

 

3. Linear system responses and optimization applications in control theory based on closed forms.

 

I have worked on this project since 2004 in cooperation with Anna Soffía Hauksdóttir, professor in the Faculty of Electrical and Computer Engineering at University of Iceland. The focus is on a new presentation of problems in linear control theory, relating to optimization, model reduction and tracking, based on closed form representation of the solutions, both continuous and discrete, and how it may be used in the design of more efficient algorithms. Conference publications 31-33, 36-38, 40, 42, 45, 49, 54, 59, 60, and 67, and journal publication 47, in the list below have resulted from this work, as well as the masters theses of Berþór Ævarsson, Helgi Þorgilsson and Hinrik Ingi Hinriksson. Gísli Herjólfsson also worked for a number of years as a Ph.D. student under our supervision.

 

4.  Machine learning and kernel methods.

 

I have worked on various projects related to this field since 2002, mostly  in cooperation with Tómas P. Rúnarsson, presently a professor in the Faculty of Industrial Engineering, Mechanical Engineering and Computer Science at University of Iceland. These projects have involved the use of support vector machines, or more generally kernel methods, decision trees and neural networks, and applications have e.g. involved classification of EEGs and ocean vessel fuel optimization. The latter work has been carried out in collaboration with the firm Marorka - Marine Energy Management Solutions. Conference publications 23, 27, 34-35, 44 and 51, and journal publications 41, 43, 46 and 57  in the list below have resulted from this work as well as the masters theses of Héðinn Steingrímsson, Sigrún Dóra Sævinsdóttir, Þóra Jónsdóttir, Paul Gunnar Garðarsson, Hildur Sævarsdóttir and Stefán Kristjánsson. Steinn Guðmundsson defended his  Ph.D.-thesis on the use of kernel methods for classification of time series in April 2010 under the supervision of  Tómas P. Rúnarsson and myself. Recent M.Sc. thesis of Jón Daðason on post-correction of Icelandic OCR-text under joint supervision of myself and Kristín Bjarnadóttir, research lecturer at The Árni Magnússon Institute for Icelandic Studies, also relates to this type of work.

 

5.  Numerical Modeling of Controlled Release of Drugs.

 

I have worked on a numerical model of controlled release of drugs from many layer silicone elastometers since 2011 in cooperation with Fjóla Jónsdóttir, professor at the Faculty of Industrial Engineering, Mechanical Engineering and Computer Science at University of Iceland and Már Másson, professor at the Faculty of Pharmaceutical Sciences, University of Iceland, as well as his Ph.D. student Bergþóra Snorradóttir, who graduated in 2013, Svetlana Solodova, a postdoc of Már and Kristinn Guðnason who is presently a Ph.D. student of Fjóla and co-supervised by me. The aim is to simulate extensive experimental results that have been carried out in the the Faculty of Pharmaceutical Sciences so as to aid in the design complex drug control systems. Conference publication 55 and journal publications 61, 63, and 66 in the list below are on this topic.

6.  Automatic (algorithmic) reverse differentiation of matrix computations.

I have worked on this project since 2010 in cooperation with, Kristján Jónasson, professor at the Department of Computer Science, University of Iceland. The aim has been to derive formulae for reverse automatic (algorithmic) differentiaition of basic matrix operations, in such a way that direct use can be made of the BLAS-library, and to develop a corresponding library for the reverese automatic differentiation.

Research related publications:

1. Sven Þ. Sigurðsson (1970) Gravity Survey on Western Vatnajökull. Jökull, 20, pp. 38-44.

2. Sigurdsson, S. (1971) Linear Multistep Methods with Variable Matrix Coefficients. Conf. on Applications of  Numerical Analysis, Dundee, March 23-26, 1971, Lecture Notes in Mathematics 228, Springer Verlag, pp. 327- 331.

3. J. D. Lambert, S. T. Sigurdsson (1972) Multistep Methods with Variable Matrix Coefficients. SIAM J. Numer. Anal. Vol. 9,  No.4,  pp. 715-733.

4. Sven T. Sigurdsson (1973) Multistep Methods with Variable Matrix Coefficients for Systems of  Ordinary Differential Equations. Ph. D. Thesis, Dept. of Mathematics, The University, Dundee,  Scotland, and Report no. 1973.04, Dept. of Computer Science, Chalmers Institute of Tecnology and  University of Göteborg, 195 pp..

5. S. Arnórsson, S. Sigurdsson (1974) The Utility of Waters from the High-Temperature Areas in Iceland for Space Heating as Determined by Their Chemical Composition. Geothermics, Vol. 3, No. 4, pp. 127-141. 

6. Stefán Arnórsson, Karl Grönvold, Sven Sigurdsson (1978) Aquifer chemistry of four high-temperature  geothermal systems in Iceland. Geochimica et Cosmochimica Acta, Vol. 42, pp. 523-536.

7. Axel Björnsson, Gunnar Johnsen, Sven Sigurdsson, Gunnar Thorbergsson, Eysteinn Tryggvason (1979) Rifting of  the Plate Boundary in Northern Iceland 1975-1978. Journal of Geophysical Research, Vol. 84, No. B6, pp. 3029-3038.

8. S. P. Kjaran, S. T. Sigurdsson (1979) Two Techniques Associated with the Galerkin Method for  Solving Ground Water  Flow Problems. Finite Elements in Water Resources, Proceedings of the Second International Conference on Finite Elements in Water Resources held at Imperial College, London, in July, 1978, Pentech Press, pp. 1.227- 1.247.

9. G. V. Johnsen, A. Björnsson, S. Sigurdsson (1980) Gravity and Elevation Changes Caused by Magma Movement Beneath the Krafla Caldera, Northeast Iceland. Journal of Geophysics, 47, pp.132-140.

10.  Baldur Jónsson, Björn Ellertsson, Sven Þ. Sigurðsson (1980) Tölvukönnun á tíðni orða og stafa í íslenskum texta. Raunvísindastofnun Háskólans, RH-80-12, 148 pp..

11.  Snorri P. Kjaran, Sven T. Sigurdsson (1981) Treatment of time derivative and calculation of flow when  solving groundwater flow problems by Galerkin finite element methods. Adv. Water  Resources,  Vol. 4, pp. 23-33.

12. Stefán Arnórsson, Sven Sigurdsson, Hördur Svavarsson (1982) The chemistry of geothermal waters in  Iceland. I. Calculation of aqueous speciation from 0° to 370°C, Geochimica et  Cosmochimica Acta. Vol. 46, pp. 1513-1532.

13  S. P. Kjaran, S. L. Holm, S. Sigurdsson, (1988) Testing of Finite Element Schemes for Linear  Shallow Water Equations. Computational Methods in Water Resources, Vol. 1 Modeling  Surface and Sub-Surface Flows, Proceedings of the VII International Conference, MIT, USA, June1988, Elsevier, Computational Mechanics Publications, pp. 249-256.

14. S. Sigurdsson, S. P. Kjaran, G. G. Tómasson (1988) A Simple Staggered Finite Element  Scheme for Linear Shallow Water. Computational Methods in Water Resources, Vol. 1 Modeling Surface and Sub-Surface Flows, Proceedings of the VII International Conference, MIT, USA, June1988, Elsevier, Computational Mechanics Publications, pp. 329-335.

15. S. Sigurdsson (1990) On the Stability of Staggered Finite Element Schemes for Simulation of Shallow Water Free Surface Flow. Computational Methods in Surface Hydrology, Proceedings of the Eighth International Conference on Computational Methods in Water Resources, held in Venice, Italy, June 11-15 1990. Computational Mechanics Publications, Springer Verlag, pp. 449-454.

16. S. Sigurdsson (1992) Treatment of the Convective Term in Staggered Finite Element Schemes for Shallow Water Flow. Computational Methods in Water Resources IX , Vol. 1: Numerical  Methods in Water Resources, Computational Mechanics Publications, Elsevier Applied Science, pp. 291-298.

17. Sven Sigurdsson (1994) Alternative Approaches to the Wave Equation in Shallow Water Flow Modelling. Computational Methods in Water Resources X, Volume 2, Kluwer Academic Publishers, pp. 1113-1120.

18. Sigurdur Thorsteinsson, Sven Sigurdsson (1996) Orogenic blocking and deflection of stratified air Flow on an f-plane. Tellus 48A, pp.572-583.

19. Erlendur Smári Þorsteinsson, Gunnar G. Tómasson, Kristín Friðgeirsdóttir, Kristján Jónasson, Sven Þ. Sigurðsson (1996) Bráðabirgðarennslisstig. Greinargerð um útreikning og gerð  rennslisstigakorta. Raunvísindastofnun Háskólans, Reiknifræðistofa, 19 pp..

20. Sven Sigurðsson, Kristján Jónasson, Þorsteinn Arnalds (1998) Transferring Avalanches Between Paths. 25 Years of  Snow Avalanche Research, Voss 12-16 May 1998, Norwegian Geotechnical Institute, Publ. Nr. 203, pp. 259-263.

21. Kristján Jónasson, Sven Þ. Sigurðsson, Þorsteinn Arnalds (1999) Estimation of Avalanche Risk. Rit Veðurstofu Íslands, VÍ-R99001-ÚR01, 33 bls...

22. Sven Þ. Sigurðsson, Kjartan G. Magnússon, Petro Babak, Stefán F. Guðmundsson, Eva Hlín Dereksdóttir (2002) Dynamic continuous model of fish migration. Science Institute, University of Iceland. Report RH-25-2002, 31 pp..

23. T. P. Runarsson,  S. Sigurdsson (2003) Model selection for support vector machines using an asynchronous parallel evolution strategy. Proceedings of the  2003 international Conference on Neural Networks & Signal Processing.  Nanjing, China, December 14-17, 2003, Vol. 1, pp. 495-98. 

24. Simon Hubbard,  Petro Babak, Sven Th. Sigurdsson, Kjartan G. Magnússon (2004) A model of the formation of fish schools and migrations of fish. Ecological Modelling, 174, pp. 359-374.

25. Kjartan G. Magnússon, Sven Th. Sigurdsson, Petro Babak, Stefán F. Gudmundsson, Eva Hlín Dereksdóttir (2004) A continuous density Kolmogorov type model for a migrating fish stock. Discrete and Continuous Dynamical Systems-Series B, Volume 4, Number 3, pp. 695-704.

 

26. Þorsteinn Arnalds, Kristján Jónasson, Sven Sigurðsson (2004) Avalanche hazard zoning in Iceland based on individual risk. Annals of Glaciology, Volume 38, Number 1, pp. 285-290.

 

27. Thomas Philip Runarsson, Sven Sigurdsson (2004) Asynchronous Parallel Evolutionary Model Selection for Support Vector Machines. Neural Information Processing - Letters and Reviews, Volume 3, Number 3, pp. 59-67.

28. Petro Babak, Kjartan G. Magnússon, Sven Sigurdsson (2004) Dynamics of group formation in collective motion of organisms. Mathematical Medicine and Biology, Volume 21, Number 4, pp. 269-292.

29. Kjartan G. Magnússon, Sven Th. Sigurdsson and Baldvin Einarsson (2004) A discrete and stochastic simulation model for migration of fish with application to capelin in the seas around Iceland. Science Institute, University of Iceland, Report RH-20-2004.

30.  Kjartan G. Magnússon, Sven Th. Sigurdsson, Eva Hlín Dereksdóttir (2005). A simulation model for capelin migrations in the North-Atlantic. Nonlinear Analysis: Real World Applications, Volume 6, pp. 747-771.

 

31. Anna Soffía Hauksdóttir, Gísli Herjólfsson, Bergþór Ævarsson, Sven Þ. Sigurðsson (2005) Zero optimizing continuous-time tracking and disturbance rejecting controllers. Proceedings of the 16th  World Congress  of the International Federation of Automatic Control, Prague, July 4-8, 2005.

 

32. Anna Soffía Hauksdóttir, Bergþór Ævarsson, Gísli Herjólfsson, Sven Þ. Sigurðsson (2005) Linear continuous-time system responses. Proceedingss of the 16th  World Congress  of the International Federation of Automatic Control, Prague, July 4-8, 2005.

 

33. Gísli Herjólfsson, Bergþór Ævarsson, Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2005) Zero optimized tracking of continuous-time systems. Proceedings of the 2005 American Control Conference, Portland, Oregon, June 8-June 10, Volume 2, pp. 1208-1213.

 

34. Steinn Gudmundsson, Thomas Philip Runarsson (2005) Automatic Sleep Staging using Support Machines with Posterior Probability Estimates. Proceedingss of the International Conference on Computational Intelligence for Modelling, Control & Automation, 28-30 November 2005, Vienna – Austria, Volume 2, pp. 366-372.

 

35. Thomas Philip Runarsson, Sven Sigurdsson (2005) On-line Detection of Patient Specific Neonatal Seizures using Support Vector Machines and Half_Wave Attribute Histograms. Proceedings of the International Conference on Computational Intelligence for Modelling, Control & Automation, 28-30 November 2005, Vienna – Austria, Volume 2, pp. 673-677.

36. Anna Soffía Hauksdóttir, Gísli Herjólfsson, Sven Þ. Sigurðsson (2006) Zero Optimizing Tracking and Disturbance Rejecting Controllers – The extended PID controller. Proceedings of the 45th IEEE Conference on Decision and Control 2006, San Diego, California, December 13-15, pp. 5633-5638.

37. Helgi Þorgilsson, Gísli Herjólfsson, Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2006) Scheduled Control of a Small Unmanned Underwater Vehicle Using Zero Optimization. Proceedings of the 45th IEEE Conference on Decision and Control 2006, San Diego, California, December 13-15, pp. 5900-5905.

 

38. Gísli Herjólfsson, Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2006) Closed Form Expressions of Linear Continuous- and Discrete Time Filter Responses. Proceedings of the 7th Nordic Signal Processing Symposium, 2006. NORSIG 2006. Reykjavík, Iceland, June 7-9, pp. 350-353

 

39. Einar Stefánsson, Gunnar Stefánsson, Sven Þ.Sigurðsson, Eggert Briem (2006) Decimals in data values. Acta Ophthalmologica Scandinavica, Volume 84, pp. 449-450.

 

40. Anna Soffía Hauksdóttir, Gísli Herjólfsson, Sven Þ. Sigurðsson (2007) Optimizing Zero Tracking and Disturbance Rejecting Controllers – The Generalized PID Controller. Proceedings of American Control Conference, 2007. ACC ’07, New York City, July 11-13, pp. 5790-5795.
 

41. Steinn Gudmundsson, Thomas Philip Runarsson, Sven Sigurdsson, Gudrun Eiriksdottir, Kristinn Johnsen (2007)  Reliability of quantitative EEG features. Clinical Neurophysiology, Volume 118, Issue 10, pp 2162-2171.

 

42. Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson, Sigurður Örn Aðalgeirsson, Gísli Herjólfsson (2007) Closed Form Expressions for Linear MIMO System Responses and Solutions of the Lyapunov Equation. Proceedings of the 46th IEEE Conference on Decision and Control, New Orleans, LA, USA, Dec. 12-14, 2007, pp. 2797-2801.

 
43. Thora Jonsdottir, Ebba Thora Hvannberg, Helgi Sigurdsson, Sven Sigurdsson (2008) The feasibility of constructing a Predictive Outcome Model for breast cancer using the tools of data mining. Expert Systems with Applications, Volume 34 , Issue 1, pp. 108-118.
 
44. Steinn Gudmundsson, Thomas Philip Runarsson, Sven Sigurdsson (2008) Support Vector Machines and Dynamic Time Warping for Time Series. Proceedings of the IEEE International Joint Conference on Neural Networks (IJCNN), Hong Kong, 2008, pp. 2772-2776.
 
45. Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson, Sigurður Örn Aðalgeirsson, Helgi Þorgilsson, Gísli Herjólfsson, (2008) Closed Form Solutions of the Sylvester and the Lyapunov Equations - Closed Form Gramians.  Proceedings of the 2008 American Control Conference, Seattle, Washington, USA, June 11-13, 2008, pp. 2585-2590.
 
46. Hildur Sævarsdóttir, Sven Þ Sigurðsson, Leifur Þ. Leifsson, Ari Vésteinsson, (2008) Grey-Box Modeling of an Ocean Vessel for Operational Optimization, Simulation Modelling Practice and Theory, Volume 16, Issue 8,  pp. 923-932
 

47. G. Herjólfsson, B. Ævarsson, A.S. Hauksdóttir, S.Þ. Sigurðsson (2009) Closed Form L2/H2-Optimizing of Zeros for Model Reduction of Linear Continuous Time Systems, Internationa Journal of Control, Volume 82, Issue 3, pp. 555-570

 

48. Alethea Barbaro, Baldvin Einarsson, Björn Birnir, Sven Sigurðsson, Héðinn Valdimarsson, Ólafur Karvel Pálsson, Sveinn Sveinbjörnsson, Þorsteinn Sigurðsson (2009) Modeling and simulation of the migration of pelagic fish. ICES Journal of Marine Science, Volume 66, Number 5, pp. 826-838.

 

49. Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2009) The contimuous closed form controllability Gramian and its inverse. Proceedings of the The 2009 American Control Conference, St.Louis, Missouri, USA, June 10-12, 2009, pp. 5345-5350.

 

50. Alethea Barbaro, Baldvin Einarsson, Björn Birnir, Sven Sigurðsson, Héðinn Valdimarsson, Ólafur Karvel Pálsson, Sveinn Sveinbjörnsson, Þorsteinn Sigurðsson (2009) Simulations and scaling laws for a bioenergetic model of the Icelandic capelin stock. Proceedings of the 2009 ICES Annual Science Conference, Berlin, September 21-25 2009, Theme session H: “What do fish learn in schools?” 25 pp.

 

51. Stefan Petursson, Thomas Runarsson, Sven Sigurdsson (2009) Predicting optimal trim configuration of marine vessels with respect to fuel usage. Proceedings of SIMS 50 Modeling of Energy Technology, Frederica, Denmark, October 7-8, 2009, pp. 291-298.

 

52. Steinn Gudmundsson, Gudny Lilja Oddsdottir, Tomas Philip Runarsson, Sven Sigurdsson, Eythor Kristjansson (2010) Detecting fraudulent whiplash claims by support vector machines. Biomedical Signal Processing and Control, Volume 5, pp. 311–317.

 
53. Baldvin Einarsson, Björn Birnir, Sven Sigurðsson (2011) A Dynamic Energy Budget (DEB) model for the energy usage and reproduction of the Icelandic capelin (Mallotus villosus). Journal of Theoretical Biology, Volume 281, Issue 1, pp. 1-8. 

 

54. Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2011) The Matching Coefficient PID Controller, Proceedings of the the 2011 American Control Conference, San Fransisco, USA, June 29 – July 1, pp. 710-715.

 

55. Fjola Jonsdottir, Rut Gudmundsdottir, Sven Th. Sigurdsson, Bergthora S. Snorradottir, Mar Masson (2011) Numerical Modeling of Controlled Release of Drugs From Silicone Elastomers. Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems(SMASIS2011), Scottsdale, Arizona, USA, September 18-21, Volume 1, pp. 39-44.
 
56. G. Aðalgeirsdóttir, S. Guðmundsson, H. Björnsson, F. Pálsson, T. Jóhannesson, H. Hannesdóttir, S. Þ. Sigurðsson, E. Berthier (2011) Modelling the 20th and 21st century evolution of Hoffellsjökull glacier, SE-Vatnajökull, Iceland. The Cryosphere, Volume 5, pp. 961-975.
 
57. Steinn Gudmundsson, Thomas Philip Runarsson, Sven Sigurdsson (2012) Test-retest reliability and feature selection in physiological time series classification. Computer Methods and Programs in Biomedicine, Volume 105, pp. 50-60.
 

58. Baldvin Einarsson, Alethea Barbaro, Björn Birnir, Sven Sigurðsson (2012) Líkön og hermanir af göngum, vexti og kynþroska loðnu. Vistkerfi Íslands, The Iceland Sea Ecosystem Project, Hafrannsóknir nr. 164, pp. 133-151.

 

59. Sven Þ. Sigurðsson, Anna Soffía Hauksdóttir (2012) Closed Form Expressions of Linear Discrete Time System Responses with an Application to PID Controllers. Proceedings of the IFAC Conference on Advances in PID Control PID’12, Brescia (Italy), March 28-30, ThPS.9, 6 pp..

 

60. Gísli Herjólfsson, Anna Soffía Hauksdóttir, Sven Þ. Sigurðsson (2012) L2/H2-optimal zeros two stage optimization. Proceedings of the IFAC Conference on Advances in PID Control PID’12, Brescia (Italy), March 28-30,  6 pp..

 

61. Bergthóra S. Snorradóttir, Fjóla Jónsdóttir, Sven Th. Sigurdsson, Freygardur Thorsteinsson, Már Másson (2013) Numerical modelling and experimental investigation of drug release from layered silicone matrix systems. European Journal of Pharmaceutical Sciences, Volume 49(4), pp. 671-678.

 

62. Andri Arnaldsson, Jean-Claude Berthet, Snorri Kjaran, Sven Þ. Sigurðsson (2014) Numerical scheme to simulate flow through anisotropic rocks in TOUGH2. Computers & Geosciences, Volume 65, pp. 37-45.

 

63. Bergthóra S. Snorradóttir, Fjóla Jónsdóttir, Sven Th. Sigurdsson, Már Másson (2014) Numerical modelling of transdermal delivery from matrix systems: Parametric study and experimental validation with silicone matrices. Journal of Pharmaceutical Sciences, Volume 103, pp. 2366-2375.

 

64. Hrafnhildur Hannesdóttir, Guðfinna Ađalgeirsdóttir, Tómas Jóhannesso, Sverrir Guđmundsson, Philippe Crochet, Hálfdán Ágústsson, Finnur Pálsson, Eyjólfur Magnússon, Sven Sigurdsson, Helgi Björnsson (2015) Downscaled precipitation applied in modelling of mass balance and the evolution of southeast Vatnajökull, Iceland, Journal of Glaciology, Volume 61, Issue 228, pp. 799-813.

 

65. Chrispine Nyamweya, Christopher Desjardins, Sven Sigurdsson, Tumi Tomasson, Anthony Taabu-Munyaho, Lewis Sitoki, Gunnar Stefansson (2016) Simulation of Lake Victoria circulation patterns using the Regional Ocean modeling system (ROMS), PloS One, Volume 11, Issue 3, pp. e0151272

 

66. Kristinn Gudnason, Svetlana Solodova, Anna Vilardell, Mar Masson, Sven Sigurdsson, Fjola Jonsdottir (2017) Numerical simulation of Franz diffusion experiment: Application to drug loaded soft contact lenses. Journal of Drug Delivery Science and Technology, Volume 38, April 2017, pp. 18-27.

67. Sven Þ. Sigurðsson, Anna Soffia Hauksdottir  (2017) Closed Form Expressions of Linear Discrete Time System Responses. 20th IFAC World Congress, IFAC-PapersOnLine, Volume 50, Issue 1, July 2017, pp. 9291-9296.

Thesis supervision:

 

Supervised M.Sc. theses:

Héðinn Steingrímsson: Modeling the Behaviour of Capelin using Reinforcement Learning, 2003

Gunnar Stefánsson: Design and Implementation of an Equation Solver for an Energy Management System, 2004

Paul Gunnar Garðarsson: Web Mining and Machine Recognition of Web Robots, 2007

Hildur Sævarsdóttir: Grey Box Modeling and Operational Fuel Optimization of a Container Vessel, 2007

 

Co-supervised M.Sc. theses:

Sigrún Dóra Sævinsdóttir: Detecting Neonatal Seizures in EEG Recordings Using Support Vector Machines, 2004 (with Tómas P. Rúnarsson)

Þóra Jónsdóttir: Data Mining - A Data Eye of View. Practical data mining using a medical data set about breast cancer patients, 2005 (with Ebba Hvannberg)

Bergþór Ævarsson: Linear System Responses and Optimization Applications, 2005 (with Anna Soffía Hauksdóttir)

Helgi Þorgilsson: Control of Small Unmanned Underwater Vechicle Using Zero Optimized PID Controllers, 2006 (with Anna Soffía Hauksdóttir)

Stefán Pétursson: Predicting Optimal Trim Configuration of Marine Vessels with Respect to Fuel Usage, 2009 (with Tómas P. Rúnarsson)

Stefán Freyr Guðmundsson: Samfelld líkön fyrir rándýr og bráð (Continuous Models of Predators and Prey), 2010 (with late Kjartan G. Magnússon)

Jón Friðrik Daðason: Post-Correction of Icelandic OCR Text, 2012 (with Kristín Bjarnadóttir)

 

Co-supervied  Ph.D.-theses:

Steinn Guðmundsson, Time Series Classification, 2010 (with Tómas P. Rúnarsson).

Baldvin Einarsson, An Interacting Particle Model and Dynamic Energy Budget Theory: Analysis and Applications, 2011 (with Björn Birnir)

Bergþóra S. Snorradóttir, Silicone matrices for controlled drug delivery, 2014 (with Már Másson and Fjóla Jónsdóttir)

 

Courses taught at University of Iceland

Courses in Mathematics               Year
Numerical Analysis                         73-75, 77-81, 83-86, 91-94, 97, 99
Partial Differential Equations II        76
Numerical Linear Algebra               79, 81, 83, 91, 04
Operation Research                        93, 97
Nonlinear Optimization                    94
Mathematical Analysis I                   78-80
Mathematical Analysis II                  85
Mathematics  II                               95-97, 99, 00, 01
Mathematical Analysis III                94-95
Mathematical Analysis IV               74-80, 82-83, 87-88, 90-93(part), 84(all)
Differential Equations                      75-77, 89-92
Mathematics for Geologists             78, 80, 82
Mathematical Modelling in Biology  97(part)

Courses in Computer Science
Programming                                 73-75, 01-03, 08
Data Structures                              79
Discrete Mathematics                    81-87, 89-90, 92, 94, 96, 06-10
Formal Languages and Automata   83-87, 89-93, 95, 97, 09-11
Logic Programming                       85-87(part)
Analysis of Algorithms (n)             87-88(part), 95(all)
Algorithms, Logic, Computability  99, 00, 02, 03, 05, 10, 11
Logic in Computer Science           01-04, 06, 06-08
Machine Learning                         03, 04, 06(part)

Scientific Computing                     06, 07