The spectrum for the pure gauge sector is calculated for an extended Isgur-Paton model in 2+1 and 3+1 dimensions and compared to recent lattice calculations of the glueball spectrum. The IP model is extended by inclusion of a rigidity (curvature) term and, in D=2+1, mixing through a higer topological contribution. For a choice of parameterizations, near quantitative agreement is found for SU(3)...

In this note the open string orbifold partition function is analyzed carefully in a way to reveal the group-theoretical aspects. For the simple cases of ADE orbifolds with regular Chan-Paton action a prescription for consistent boundary states is given. In the process of outlining how they encode McKay correspondence, we argue that this results from a non-trivial conspiracy of numerical factors...

this commentary on the editorial ‘the politics and analytics of health policy’ by professor calum paton focuses on two issues. first, it points to the unclear links between ideas, ideology, values, and discourse and policy, and warns that discourse is often a poor guide to enacted policy. second, it suggests that realism, particularly ‘programme theory’ are useful tools for health policy analys...

WHILE investigating certain aspects of the neuromuscular blocking properties of gallamine in cats it was observed that in some animals the intravenous injection of small quantities of the drug was followed by a transient hypotension. As any activity displayed by a drug in the experimental animal may also reveal itself in clinical practice (Paton, 1959) it seemed desirable to examine this phenom...