In this paper, re-configurable intelligent reflecting surfaces (IRS) based on cell-free communications to serve multi-user (MU) are considered. This is to enhance the transmission for the next ...

This paper presents a polyhedron volumetric method used for multi-system. This algorithm is based on tetrahedron volumetric method, and the satellite selection is brought for the characteristics of ...

Meet Bille, the name given to the world's first monostable tetrahedron—a four-faced object that will always land on the same side, no matter its starting position. This feat of geometry and ...

Object Details maker Berman, Martin Description The top face of this model is a pentagon, the bottom a regular decagon. Around the sides are five squares and five equilateral triangles, alternating.

Object Details maker Berman, Martin Description The faces of the model are twenty equilateral triangles, thirty squares, and twelve regular pentagons. For further information about Berman's models of ...