A business model in which a distributor network is needed to build the business. Usually such businesses are also multilevel marketing in nature in that payouts occur at more than one level. Network ...

Objectives To date, consistent evidence for consequences of heading in football (soccer) on the structure and function of the ...

Topological matter refers to systems in which topology is required for their characterisation. This includes materials with topological defects such as skyrmions, or topologically-protected edge modes ...