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2003- : Assistant research professor
at Informatics and Mathematical Modelling, Technical University
of Denmark. AE-WATT project: Marine Power Plant Management and Monitoring
using Acoustic Emission, supported by EU under the Competitive and
Sustainable Growth Program.
Publications:
Sigurdsson, S., Pontoppidan, N. H. and Larsen,
J. Supervised and unsupervised condition monitoring of non-stationary
acoustic emission signals. Accepted for International Conference
on Condition Monitoring and Diagnostic Engineering Management, COMADEM
2005. [pdf]
Pontoppidan, N. H., Larsen, J. and Sigurdsson,
S. Non-stationary Condition Monitoring of large diesel engines
with the AEWATT toolbox. 59th meeting of the Society for Machinery
Failure Prevention Technology, 2005.[pdf]
Pontoppidan, N. H., Sigurdsson, S. and Larsen,
J. Condition monitoring with Mean field independent components
analysis. Mechanical systems and signal processing: Special
issue on blind source separation. 2005 [pdf]
Pontoppidan, N. H. and Sigurdsson, S. Independent
components in acoustic emission energy signals from large diesel
engines. International Journal of COMADEM, 2005. [pdf]
N.H. Pontoppidan, J. Larsen, S. Sigurdsson, J.
Steel, R. Douglas, T. Fog, E. Brown. Data Acquisition Strategy
and Signal Preprocessing. Technical Report 2003, Informatics
and Mathematical Modelling, Technical University of Denmark, 2003.
2003: Assistant research professor
at Informatics and Mathematical Modelling, Technical University
of Denmark. The Human Brain Project: Classification and feature
extraction from functional neuroimages.
1999-2003: Ph.D. student at Informatics
and Mathematical Modelling, Technical University of Denmark. Diagnosis
support systems, pattern recognition, classification and visualization
of medical data. Case study is Raman spectroscopy for classification
of skin lesions.
Publications:
S. Sigurdsson. A Probabilistic Framework
for Detection of Skin Cancer by Raman Spectra. Ph.D. Thesis,
Informatics and Mathematical Modelling, Technical University of
Denmark, DTU, 2003. [zip]
S. Sigurdsson, L.K. Hansen and K.T. Drzewiecki.
Identifying Black Dots in Dermatoscopic Images using Template
Matching. Technical Report 2003-21, Informatics and Mathematical
Modelling, Technical University of Denmark, 2003. [pdf]
M. Gniadecka, P.A. Philipsen, S. Sigurdsson, S.
Wessel, O.F. Nielsen, D.H. Christensen, J. Hercogova, K. Rossen,
H.K. Thomsen, R. Gniadecki, L.K. Hansen, H.C. Wulf. Malignant
Melanoma Diagnosis by Raman Spectroscopy and Neural Network: Structure
Alterations in Proteins and Lipids in Intact Cancer Tissue.
Accepted for Journal of Investigative Dermatology, 2003.
S. Sigurdsson, P.A. Philipsen, L.K. Hansen, J.
Larsen, M. Gniadecka, and H.C. Wulf. Detection of Skin Cancer
by Classification of Raman Spectra. Accepted for IEEE Transactions
on Biomedical Engineering, 2003.
S. Sigurdsson, J. Larsen, L.K. Hansen, P.A.
Philipsen and H.C. Wulf. Outlier estimation and detection: Application
to Skin Lesion Classification. In proceedings of ICASSP'2002,
Orlando, Florida, USA, May 13-17, vol. I, pp. 1049-1052, 2002.
[pdf]
1999: Research assistant at Informatics
and Mathematical Modelling, Technical University of Denmark. Working
on text analysis, feature extraction from text and document classification.
Publications:
L.K. Hansen, S. Sigurdsson, T. Kolenda,
F.Å. Nielsen, U. Kjems and J. Larsen. Modeling Text with
Generalizable Gaussian Mixtures. In proceedings of IEEE ICASSP'2000,
Istanbul, Turkey, June 5-9, 2000, vol. VI, pp. 3494-3497. [pdf]
T. Kolenda, L.K. Hansen and S. Sigurdsson.
Independent Components in Text. Advances in Independent Component
Analysis, Springer-Verlag, M. Girolami (ed.), 2000. [zip]
1998-1999: Research assistant at
Informatics and Mathematical Modelling, Technical University of
Denmark. Working on feature extraction and classification of skin
lesions from dermatoscopic images.
Publications:
S. Sigurdsson, L.K. Hansen and K.T. Drzewiecki.
Color Segmentation of Skin Lesions with the Generalizable Gaussian
Mixture Model. Technical Report 2003-22, Informatics and Mathematical
Modelling, Technical University of Denmark, 2003. [pdf]
S. Sigurdsson, L.K. Hansen and K.T. Drzewiecki.
Identifying Black Dots in Dermatoscopic Images using Template
Matching. Technical Report 2003-21, Informatics and Mathematical
Modelling, Technical University of Denmark, 2003. [pdf]
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