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Heidi Elisabeth Iuell Dahl

Research Scientist

Heidi Elisabeth Iuell Dahl

Research Scientist

Heidi Elisabeth Iuell Dahl
Phone: 470 77 444
Department: Mathematics and Cybernetics
Office: Oslo

Publications and responsibilities

Publications

Publication

Symmetries of canal surfaces and Dupin cyclides

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1534924

We develop a characterization for the existence of symmetries of canal surfaces defined by a rational spine curve and rational radius function. In turn, this characterization inspires an algorithm for computing the symmetries of such canal surfaces. For Dupin cyclides in canonical form, we apply the...

Year 2017
Type Journal publication
Publication

Deconfliction and Surface Generation from Bathymetry Data Using LR B-splines

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1534135

A set of bathymetry point clouds acquired by different measurement techniques at different times, having different accuracy and varying patterns of points, are approximated by an LR B-spline surface. The aim is to represent the sea bottom with good accuracy and at the same time reduce the data size ...

Year 2017
Type Part of a book/report
Publication

Isotropic Möbius Geometry and i-M Circles on Singular Isotropic Cyclides

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1337407

The Möbius geometry of R 3 has an isotropic counterpart in R 3 ++0 . We describe the isotropic Möbius model of surfaces in R 3 ++0 and show how the degree of a surface changes under i-M inversions while the number of families of i-M circles remain constant. This gives us a generalization of the clas...

Year 2015
Type Journal publication
Publication

Piecewise Rational Parametrizations of Canal Surfaces

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1197536

Canal surfaces, as envelopes of one-parameter families of spheres, correspond to curves in Minkowski space. We show that the continuity properties of a canal surface are inherited from the continuity properties of the associated curve, i.e., two curves joined with G 1 or G 2 continuity in Minkowski ...

Year 2014
Type Part of a book/report
Publication

Rational Parametrizations of Edge and Corner Blends for Isogeometric Analysis

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1181408

Rational variable radius rolling ball blends between pairs of natural quadrics can be constructed from rational curves in their bisector surface in R 3,1 . For certain configurations of natural quadrics, these curves can be constructed by taking hyperplane sections, or by constructing Bézier curves ...

Year 2014
Type Part of a book/report
Publication

A modular approach to the modelling and analysis of risk scenarios with mutual depenencies

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1344255

This report describes a modular approach to the modelling and analysis of risk scenarios with mutual dependencies. The presented approach may be used to deduce the risk-level of an overall system from previous risk analyses of its constituent systems. It may also be used to decompose the analysis of...

Authors Brændeland Gyrd Dahl Heidi Elisabeth Iuell Stølen Ketil
Year 2008
Type Report/thesis
View all publications at Cristin