Two-neutrino double-beta $(2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta})$ decay has been used to constrain the neutron-proton part of effective interactions, which in turn is compute nuclear matrix elements for neutrinoless decay, observation would have important consequences fundamental physics. We carefully examine $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ within proton...

In 44 patients with coronary disease the relation between work and ST segment depression (AST) was investigated during graded exercise standardised in terms of each subject's maximum work capacity (W max). In 10 patients who were subsequently treated medically (group M) the relation remained unaltered during subsequent studies at three and 12 months. In all patients the effect of beta blockade ...

Efficient generation of tunable femtosecond pulses in the blue is reported in the nonlinear crystal BiB3O6. By use of fundamental pulses from a mode-locked Ti:sapphire laser at 76 MHz, single-pass second-harmonic average powers of as much as 830 mW have been generated at 50% conversion efficiency, and a tunable range of 375-435 nm in the blue is demonstrated. Temporal measurements using cross c...

What is the fundamental structure of the world? To clarify: I take fundamentality to be metaphysical priority, where ‘‘metaphysical priority’’ is best understood in the traditional sense, such that the metaphysically prior is that in which everything else consists. The fundamental structure concerns the fundamental constituents of the world, the constituents from which everything else is constr...

The main tools in the theory of n-ary hyperstructures are the fundamental relations. The fundamental relation on an n-ary hypersemigroup is defined as the smallest equivalence relation so that the quotient would be the n-ary semigroup. In this paper we study neutral elements in n-ary hypersemigroups and introduce a new strongly compatible equivalence relation on an n-ary hypersemigroup so that ...

In this paper, we introduce the notion of $G_\infty$-ring spectra. These are globally equivariant homotopy types with a structured multiplication, giving rise to power operations on their and cohomology groups. We illustrate structure by analysing when Moore spectrum can be endowed structure. Such $G_\infty$-structures correspond underlying ring, indexed Burnside ring. exhibit close relation be...