Sigillarian Stems

The Morphology and Reproductive Biology of the Sigillarian Cone Mazocarpon

Equivariant Stable Stems

Let S(r) denote the w-sphere with a linear involution having a fixed point set of codimension r, where O ^ r ^ w . We pick some fixed point as a base point and consider the set [S(r); S(t)] of base point preserving equivariant homotopy classes of maps from S(r) to S(t). This has a natural group structure for n—r^l and is abelian if n—r^2. There is a suspension functor S without action and one 2...

Neural Development: Brain stems

The discovery of stem cells in adult nerve tissue makes the repair of brain damage a realistic possibility.

Stems and Paradigms

This paper presents an analysis of the conjugational systems ofWest Germanic that highlights the central role of two basic stem types and suggests some consequences for the description of inflectional systems in general. The analyses distinguish morphomic stems, which underly morphosyntactically distinct word forms, from inflectional stems, which realise tense and mood features and provide the ...

[Conservative femoral implants. Short stems].

Uncemented hip replacement matches the best results of classic cemented replacements. With the aim of preserving bone and soft tissue, implants with shorter stems and proximal metaphyseal support have been developed. Likewise, the lack of distal load should avoid cortical diaphyseal remodelling phenomena and the thigh pain of some cylindrical and wedge implants. The resurfacing implant, very po...