All the projects presented on this page are written as part of my studies of Physics and Mathematics at IMFUFA, RUC. The projects are all in Danish, thus the titles and abstracts presented are translations.

All the texts (in Danish) are available at The Library of Roskilde University RUB.
Some of the projects are also published as IMFUFA texts. The "IMFUFA texts" are a series of projects and papers by students and researchers at IMFUFA, and can be bought by contacting IMFUFA.
A few of the projects are also available on this page as postscript files.

Projects written as part of my master studies

Topological study of the von Carman vortex shedding

Anomalous swelling in phosphor lipid bilayers

Sources and sinks in Peskins 2D heart model

Projects written as part of my bachelor studies

Mathematics and Physics in the history of vector analysis

Tidal forces

Natural science in political decision making

The effect of catamaran generated waves on sediment

Microbiological combatant of oil marine-pollution

Topological study of the von Carman vortex shedding

Co-author: Bo Jakobsen
Published as: IMFUFA text nr 412, 2002
Supervisors: Morten Brøns Department of Mathematics, Technical University of Denmark
Johnny Ottensen IMFUFA, RUC
The project report in Danish (postscript file)
Short English summary (pdf)

Abstract

The Von Carman Vortex shedding is the pattern seen when fluid passes a cylinder, and it is a classical problem in fluid dynamics. Using tools from the qualitative theory of dynamical systems (bifurcation theory) we proposed a simple model describing the formation and shedding of the vortexes, and found results that agree with numerical simulations.

Anomalous swelling in phosphor lipid bilayers

Co-authors: Arnold Skimminge
Esben Thormann
Stine Timmermann
Published as: IMFUFA text 397, 2001
Supervisor: Dorthe Posselt, IMFUFA, RUC
The project report in Danish (postscript file)

Abstract

Close to a phase transition found in phosphor lipid bilayers there is a swelling of the bilayers which is not well understood. We did a systematic study modificating the bilayer itself by changing the chagelenght of the phosphor lipids, and modificating the aqueous environment, and thereby the intermolecular forces between the layers, by adding different salts. The experiments were done using small angle X-ray scattering.

Sources and sinks in Peskins 2D heart model

Co-author: Bo Jakobsen
Published as: IMFUFA text nr 388, 2000
Supervisor: Jesper Larsen, IMFUFA, RUC
The project report in Danish (postscript file)
English summary (postscript file)

Abstract

We worked with a Fluid Dynamic model of the heart, discussing what the appropriate equations should be. We developed new physical based methods for analysing the results from the model, and did numerical analysis on large amounts of data.

Mathematics and Physics in the history of vector analysis

Co-authors: Albena Ivanova Nielsen
Stine Marott Normann
Supervisors: Carsten Lunde Petersen, IMFUFA, RUC
Jeppe Dyre, IMFUFA, RUC

Abstrac

The different significanse of mathematics and physics on the development of vector analysis was studied by reading original scientific papers from the late 19th century by W.R.Hamilton, P.G.Tait, J.C.Maxwell J.W.Gibbs and mainly O.Heaviside. We found that mathematics by the development of quaternion calculus made the foundation for vector analasys but that it was the needs of electromagnetics and the relation to physical objects that formed vector analysis as we know it today.

Tidal force

Co-authors: Ditte Gundermann
Esben Thormann
Eva Uhre
Finn Dorph-Petersen
Supervisor: Bent C. Jørgensen, IMFUFA, RUC

Abstract

We did detailed explainations and calculations on tidalforces. The specific tidal forces on Earth were studied by numerical calculations in both a 3 dimensional and a 2 dimensional description. We concluded that all the main variations in the tidal forces can be captured by a 2 dimensional model.

Natural science in political decision making

Co-authors: Pia Jørgensen
Martin Roursgaard
Heidi Louise Bagger
Ole Sørensen
Supervisor: Jette Rank, Department of Environment, Technology and Social Studies, RUC

Abstract

The project was a case study on the oral and written communication between politicans and sciencetist during the developement of a new water protection law.

The effect of catamaran generated waves on sediment

Co-authors: Jens Malmquist
Ditte Gundermann
Henrik Pedersen
Supervisor: Mogens Bruun Heefelt, IMFUFA, RUC

Abstract

Through combining existing theory on generation of waterwaves by boats, waterwaves, and mobilities of sediment the effect of a boat with a given speed on a given waterdepth and on a given sediment was modelled. This was combined with measurements from Kalundborg fjord in Denmark.

Microbiological combatant of oil marine-polution

Co-authors: Michelle Nordberg
Helle Have
Mette Pedersen
Ketil Koop-Jacobsen
Søren Baggeer Sørensen
Finn Dorph-Petersen
Rune Steen Johnsson
Supervisor: Jan Nissen, RUC

Abstract

The project contained a theoretical analysis of the chemical, microbiological, and pratical possibilities of using bacteria and fungus in combating oil marine polution.