Full expansion and complete contraction are, then, the results of such stimuli as light, extremes of heat and cold, pituitrin, and adrenalin. Moderate contraction (B) might well be called a state of relaxation when the dermal melanophores are under no stimulation-room temperature and darkness being taken as the absence of all stimuli. My results on Necturus confirm those of Dawson in that the m...

tcrs and optimal positioning of the patient, for best effect. In investigating the technique, I chose to use large volumes of 0.5% bupivacaine, but only in an attempt to ensure that volume and concentration of local anaesthetic could not be implicated in failed blockade. I have no doubt, from subsequent personal experience, that tmalW volumes and concentrations of local anaesthetic can provide ...

This paper considers some measure-valued processes {Xt : t ∈ [0, T ]} based on an underlying critical branching particle structure with random branching rates. In the case of constant branching these processes are Dawson-Watanabe processes. Sufficient conditions on functionals Φ of the process are given that imply that the expectations E(Φ(XT )) are comparable to the constant branching case. Ap...

We study some remarkable path-properties of generalised stable Fleming-Viot processes (including the so-called spatial Neveu superprocess), inspired by the notion of a “wandering random measure” due to Dawson and Hochberg (1982). In particular, we make use of Donnelly and Kurtz’ (1999) modified lookdown construction to analyse their longterm scaling properties, exhibiting a rare natural example...

A general strategy in terms of degradating and ion-exchange synthesis was used to design pentadecatungstotrivanadodiphosphoric heteropoly acid H(9)P(2)W(15)V(3)O(62)·28H(2)O with Dawson structure and excellent conductivity. The product was characterized by ICP-MS, IR, UV, XRD, (31)P NMR, TG-DTA and electrochemical impedance spectroscopy (EIS). The results indicate that H(9)P(2)W(15)V(3)O(62)·28...

ABSTRACT. The behavior at criticality of spatial SIR (susceptible/infected/recovered) epidemic models in dimensions two and three is investigated. In these models, finite populations of size N are situated at the vertices of the integer lattice, and infectious contacts are limited to individuals at the same or at neighboring sites. Susceptible individuals, once infected, remain contagious for o...