The computing data indicates that because cartridge cases are thin walled cylinders, the emission stress and plastic deformation are high under gun pressure.

应用非线性有限元方法计算药筒的发射应力和抽壳力。

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One of the most closely watched cases this term will be heard early next year when the high court considers a challenge to gun control laws in the city of Chicago.

VOA: standard.2009.10.05

One of the most closely watched cases involves the rights of gun owners in the city of Chicago, where the city's ban on hand guns is being challenged by 2nd amendment advocates.

VOA: standard.2009.10.01

The court is scheduled to hear cases involving gun rights, free speech and whether juvenile offenders should be sentenced to life in prison without parole in criminal cases that do not involve murder.

VOA: standard.2009.10.05

In some cases, gun-rights advocates are seeking mental health reforms as an alternative to more gun laws.

NPR: After Shootings, States Rethink Mental Health Cuts

Despite the recent cases, gun crime has been falling steadily for a decade.

ECONOMIST: Taking pot-shots at a white elephant

"Ms. Halligan has a well-documented record of advocating extreme positions on constitutional issues, pushing legal arguments beyond what I think is reasonable, including in cases involving Second Amendment gun rights, abortion, the death penalty and others, " said Sen.

CNN: Obama nominee for federal appeals court withdraws