Researchers created a mathematical model analyzing combustion waves — from slow flames to supersonic detonation. It yields accurate solutions and explains the transition from deflagration to detonation. The work paves the way for safer engines and improved protection against industrial explosions.

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The Northampton fly-half sat out training on Monday because of illness but England have been quick to allay fears that his participation against Italy is in doubt. Provided he recovers, Smith is expected to start at fly-half in place of George Ford.

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