Institute of Physics

Supramolecular Organization of Copper-Coordinated Segmented Polyurethanes

Abstract The supramolecular organization in segmented polyurethanes modified with various copper-containing metal complexes was studied using the small-angle X-ray scattering method and atomic-force microscopy. It was found that in series of CuCl2—N,N'-diethylhydroxylamine (MCS s...

Individual Patterns of Heart Rate Variability During Prolonged Cognitive Load with Mental Fatigue Induction

We investigated individual dynamics of cognitive performance and heart rate variability (HRV) measures during prolonged mental load. The aim of this study was to identify characteristic phases of cognitive performance and individual patterns of physiological responses induced by...

Finite-time orientational relaxation restructures collective motion in polar active matter

We introduce a Langevin formulation of Vicsek-like active particles, in which orientations evolve through finite-rate relaxation toward the local mean direction, with alignment strength J and rotational diffusivity Dr, thereby combining Vicsek-type local consensus with XY-like or...