Browsing All Posts published on »August 18th, 2011«

China Reveals Solar Sail Plan To Prevent Apophis Hitting Earth in 2036

August 18, 2011

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A small shove could prevent a global catastrophe, according to Chinese plans Apophis is a 46 million tonne asteroid that will pass within a hair’s breath of Earth in 2029. However, Apophis’s trajectory is likely to take it through a region of space near Earth known as a keyhole that will ensure the asteroid returns […]

Candles shine new light on diamonds

August 18, 2011

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By Christine Lavelle Candle flames contain millions of tiny diamond particles, a university professor has discovered. Research by Wuzong Zhou, a professor of chemistry at the University of St Andrews in Fife, revealed that around 1.5 million diamond nanoparticles are created in a candle flame every second it is burning. Dr Zhou used a new […]

Time-Energy Uncertainty Relation for a Quantum Clock as a Control Device

August 18, 2011

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A quantum clock working as a control device is examined. The quality of the control process is characterized by the magnitude of deviation of perturbed state from unperturbed state of the controlled system. Uncertainty relations that relate the time duration of the process and energy of the clock to the quality of the control are […]