By allowing students to focus their outside-of-class study time on the topics and concepts that are most challenging to them, adaptive learning has been shown to help students study more efficiently, develop greater proficiency and earn better grades.

ENGADGET: McGraw-Hill reveals the SmartBook: an 'adaptive' e-book for students

An extra 28 million passengers a year could use European airports if slots were allocated to airlines more efficiently, an EU study says.

BBC: EU Commission: Airport slots need improvement

Further, study of the captured space rock could teach researchers how to efficiently extract water from asteroids a resource that could be an off-Earth source of radiation shielding and rocket fuel for journeying spacecraft.

MSN: NASA might lasso an asteroid and drag it to orbit near moon

In the framework of its ISARM project, UNESCO-IHP participated in close partnership with the French Water Academy, the International Office for Water and the French Geological Survey (BRGM) in the preparation of a methodological study, launched by the French Development Agency (AFD) in order to efficiently contribute to take up the challenges of the sustainable management of transboundary aquifers.

UNESCO: EDUCATION

Second, the study does not look at whether government agencies or private firms could perform good works more efficiently than charities do.

ECONOMIST: Charities

Second, the study suggests that extremely optimistic people are less influenced by negative information because their brains process it less efficiently.

FORBES: Pollyanna Had Brain Damage! Study Claims Faulty Brain Wiring Sparks Unrealistic Optimism

That assessment was reinforced by a 2009 Northrop Grumman study that found seven Littoral Combat Ships could perform anti-piracy patrols in the Western Indian Ocean more efficiently than 20 conventional warships for a quarter of the cost.

FORBES: Low-Cost Warship Rescues Navy From Shrinking Fleet