136 citations · 363 across the 23 of their papers we have counts for
24 papers
Duality of maximal-torsion and close-packing in double helices
Kasper W. Olsen, Jakob Bohr
It is suggested that there is an interesting transition in double helices. The transition is between a helix, which has maximal torsion for the constituting helical strands, and a…
Do planetary seasons play a fundamental role in attaining habitable climates?
Kasper W Olsen, Jakob Bohr
A simple phenomenological account for planetary climate instabilities is presented. The description is based on the standard model where the balance of incoming stellar radiation a…
A principle for ideal torus knots
Kasper W Olsen, Jakob Bohr
We study simple, knotted and linked torus windings that are made of tubes of finite thickness. Knots which have the shortest rope length are often denoted ideal structures. Convent…
Twist neutrality, a zero sum rule for oriented closed space curves with applications to circular DNA
Jakob Bohr, Kasper W. Olsen
The interplay between global constraints and local material properties of chain molecules is a subject of emerging interest. Studies of molecules that are intrinsically chiral, suc…
Transcription and the Pitch Angle of DNA
Kasper W. Olsen, Jakob Bohr
The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possibl…
First principles structures and circular dichroism spectra for the close-packed and the 7/2 motif of collagen
Karl J. Jalkanen, Kasper Olsen, Michaela Knapp-Mohammady +1
The recently proposed close-packed motif for collagen is investigated using first principles semi-empirical wave function theory and Kohn-Sham density functional theory. Under thes…