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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
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| 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.
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