We study circular choosability, a notion recently introduced by Mohar and by Zhu. First, we provide a negative answer to a question of Zhu about circular cliques. We next prove that cch(G) = O (ch(G) + ln |V (G)|) for every graph G. We investigate a generalisation of circular choosability, the circular f -choosability, where f is a function of the degrees. We also consider the circular choice n...

In this tribute to Doaitse Swierstra, we present the first transformation between lazy circular programs à la Bird and strict circular programs à la Pettorossi. Circular programs à la Bird rely on lazy recursive binding: they involve circular unknowns and make sense equationally. Circular programs à la Pettorossi rely on the inductive construction of functions and their eventual application: th...

Non-circular properties of non-circular signals can be used to improve the performance of the direction-of-arrival (DOA) estimation. However, most ready-made algorithms are not applicable to the general case in which both non-circular and circular signals exist. In this paper, we present a novel DOA estimation algorithm for mixed signals, namely MS-MUSIC (Mixed Signals-Multiple Signals Classifi...

Intramolecular folding in three tandem guanine repeats of human telomeric DNA has been investigated using opticaltweezers, MD simulation and circular dichroism. A mechanically and thermodynamically stable species in this sequence shows a structure consistent with a triplex conformation. A similar species has also been observed to coexist with a G-quadruplex in a DNA sequence with four tandem gu...

The absorption and circular dichroism spectra of the intercalation complexes with DNA of the 9-aminoacridine chromophore in monoand bisfunctional forms have been determined in the visible/near-ultraviolet region. The experimental spectra were deconvoluted into contributions from three (It*, n) transitions and the dipole and rotatory strengths of one long-axis and one shortaxis polarized transit...

We report field-dependent magnetization measurements on monolayers of [Dy(Pc)2] on quartz, prepared by the Langmuir-Blodgett technique. The films are thoroughly characterized by means of X-ray reflectivity and atomic force microscopy. The magnetisation of the sample is measured through the magnetic circular dichroism of a ligand-based electronic transition.