Systems of pioneer and climax species are used to model interactions of species whose reproductive capacity is sensitive to population density in their shared ecosystem. Intraspecies interaction coefficients can be adjusted so that spatially homogeneous solutions are stable to small perturbations. In a reaction-diffusion pioneer/climax model we will determine the critical value of the diffusion...

This paper is an analysis of narratives in British English conversation. It shows that prosody and gestures made by the speaker align to the pragmatic structure of narratives and are especially used to distinguish the climax, e.g. the point of the narrative. Indeed I will show that the climax is most of the time uttered with a slower speech rate and higher voice intensity than the rest of the n...

Effects of ergocornine and reserpine on tail resorption during metamorphosis in Bufo bufo japonicus tadpoles were studied. At prometamorphosis, ergocornine induced precocious tail resorption, while reserpine scarcely affected the tail size. At the climax of metamorphosis, ergocornine was almost ineffective in accelerating tail resorption, while reserpine was effective in inhibiting tail resorpt...

Several hypotheses have been proposed to explain the increase and sustained expression of pituitary thyrotropin (TSH) in the presence of elevated plasma thyroid hormone (TH) concentrations at metamorphic climax in amphibians. It has been proposed that the negative feedback of TH on TSH is inoperative until metamorphic climax, and that it is established at this time by the upregulation of pituit...

The view that female infra-human primates do not achieve orgasm is widespread [e.g. FORD and BEACH, 1952; MORRIS, 1967]. It has been assumed that this aspect of sexual behaviour is qualitatively different in man. While there has been much experimentation in the neurophysiology and endocrinology of sexual behaviour in infra-human primates over the past 30-40 years, the assumption that female mon...

We investigate the proposal by Callan, Giddings, Harvey and Strominger (CGHS) that two dimensional quantum fluctuations can eliminate the singularities and horizons formed by matter collapsing on the nonsingular extremal black hole of dilaton gravity. We argue that this scenario could in principle resolve all of the paradoxes connected with Hawking evaporation of black holes. However, we show t...