IAEA's chief inspector took the unusual step of briefing members of its 35-nation board, including Iran, on the detailed allegations.

ECONOMIST: Is there still time for a miracle?

Kelly describes this latter step as her biggest career break, when she was 35 and had four young children, including triplets.

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Stunningly, the typical answer-based tutoring systems average an effect size of around 0.35 standard deviations, and all three of the step-based, substep-based, and human tutoring cluster around an effect size of 0.75 standard deviations.

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Samsung Electronics' stock has not enriched executives much: It has fallen by 45% in dollar terms (35% in won) in the past 12 months, declining in step with the Korean Composite Index (see The Korea discount).

FORBES: Look out, Sony