The team has made a statistical study of which antihydrogen atoms went where - up or down - and they are able to put a first set of constraints on how the anti-atoms respond to gravity.

BBC: Antigravity gets first test at Cern's Alpha experiment

And, at the same time, we also know that black representatives, particularly in the House, face a unique set of constraints, because the Republicans basically run the House.

NPR: Black Caucus Mulls Iraq Troop Withdrawal

It is not obvious, given the practical and economic advantages of currency union highlighted in the report, why that would be the case, if Scotland were willing to sign up to a Treasury-style set of constraints.

BBC: Scotland: Treasury wants a pound for a pound

It is the ability to manage effectively and implement policy under a unique set of political, economic and social constraints that truly determines a leaders success, not a resume.

FORBES: Is Running A Country Like Running A Company? Should It Matter?

It is a panel of experts that would set constraints on spending in these programs.

WHITEHOUSE: Press Briefing

The combination of oil dependence and production constraints set up a self-sabotaging boom and bust cycle.

FORBES: The Carbon Bubble

How the composer grappled with the constraints imposed by his bosses, who wanted a simple set of new pieces for each Sunday service.

NPR: Murray Perahia: Bonding With Bach And Chopin

These constraints set up a situation where the Federal Reserve and Treasury must consider the ramifications of their loose monetary and fiscal policies on the rest of the world.

FORBES: Magazine Article

With equipment and crew constraints being resolved because of a decline in gas production, drilling activity in North Dakota is set to rise even further.

FORBES: Baker Hughes Ramps Up Oil Fracking On Low Natural Gas Prices