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Efficient production of singlet delta oxygen in a bubble singlet oxygen generator (BSOG) under the influence of centrifugal acceleration, 136g, has been obtained. An output power of 770W with chemical efficiency of 25.6% has been achieved in a small-scale, supersonic chemical oxygen-iodine laser supplied by the centrifugal BSOG. The ratio of the output power to the basic hydrogen peroxide volumetric flow rate was 4.3KJ∕liter. Efficient chemical oxygen-iodine laser (COIL) operation with the centrifugal BSOG demonstrates the potential for mobile COIL applications.

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The known equivalence of the honeycomb eight-vertex model with an Ising model in a non-zero magnetic field is derived via a direct mapping. Compared with a previous derivation which uses the generalised weak-graph transformation, the new method is simpler and more direct, and can be extended to other considerations.