High .BETA. doublets and multiplets.

Antireflection coating for high index cemented doublets.

Uncoated surfaces of high index glasses when cemented to form lens doublets have inferior antireflection properties to doublets of low index glass. This can be overcome by the application of a single layer coating of aluminum oxide prior to cementing.

Supersymmetry and Euler Multiplets

Some massless supermultiplets appear as the trivial solution of Kostant’s equation, a Dirac-like equation over special cosets. We study two examples; one over the coset SU(3)/SU(2) × U(1) contains the N = 2 hypermultiplet in (3 + 1) dimensions with U(1) as helicity; the other over the coset F4/SO(9) describes the N = 1 supermultiplet in eleven dimensions, where SO(9) is the light-cone little gr...

Unification, Multiplets and Proton Decay

We make a detailed analysis of gauge coupling unification in supersymmetry. When the Standard Model gauge group is embedded in a Grand Unified Theory, new particles often appear below the GUT scale in order to predict the right phenomenology at low energy. While these new particles are beyond the reach of accelerator experiments, they change the prediction of αs. Here we classify all the (SU(3)...

Doublets in Translation

Outcomes of multiplets.

Outcomes, both short and long term, differ between singletons and multiplets. Recently, a number of large, well-designed studies have clarified these differences, particularly in light of major changes in perinatal and neonatal care that have influenced changing outcomes. Accordingly, this article will review risks for singletons, twins and higher-order multiples as whole groups and also after ...