A node-based design variable implementation for continuum structural topology optimization in a finite element framework is presented and its properties are explored in the context of solving a number of different design examples. Since the implementation ensures Ccontinuity of design variables, it is immune to elementwise checkerboarding instabilities that are a concern with element-based desi...

This cruise was the second of in total four seasonal cruises with RV Kronprins Haakon 2019/20 focusing on biology project Arven etter Nansen (AeN). named Q4 (Q4= 4th quarter year) investigating 17 stations established AeN transect along 34 E Northern Barents Sea and adjacent Arctic Basin from 76 to 82°N (see Fig. 1 below). The addressed objectives research foci RF1 Physical drivers, RF2 Human R...

We classify the compact quantum groups acting on 4 points. These are the quantum subgroups of the quantum permutation group Q4. Our main tool is a new presentation for the algebra C(Q4), corresponding to an isomorphism of type Q4 ≃ SO−1(3). The quantum subgroups of Q4 are subject to a McKay type correspondence, that we describe at the level of algebraic invariants.

We classify the compact quantum groups acting on 4 points. These are the quantum subgroups of the quantum permutation group Q4. Our main tool is a new presentation for the algebra C(Q4), corresponding to an isomorphism of type Q4 ≃ SO−1(3). The quantum subgroups of Q4 are subject to a McKay type correspondence, that we describe at the level of algebraic invariants.