An Illinois man is lucky to be alive after accidentally shooting himself in the head with a nail gun.Jan. 21, 2012 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. During World War I, machine guns were ...

ABSTRACT: Electrogenerated N-heterocyclic carbene (NHC), obtained by cathodic reduction of Bmim-BF4, behaves as organocatalyst and base in the Staudinger synthesis from an acyl chloride and a ...

** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** In the 1890s, U.S. military small ...

Founded in 1939, Central is Arkansas' oldest general aviation firm. Today, through uncompromising dedication to excellence in everything we do, Central Flying Service is the premier general aviation ...

通过第一性原理计算研究Si、Ge、Sn掺杂对MgH?(110)表面脱氢性能的影响，发现Si和Ge占据间隙位，Sn替代Mg位，导致Mg-H键弱化、带隙减小和结构不稳定。计算表明Ge最优，其次是Si和Sn。 氢能存储材料MgH?的掺杂优化机制研究 一、研究背景与意义 当前全球能源结构转型 ...

If you're thinking about buying or upgrading your camera, check out the top full-frame models we've tested. Images, and the devices that capture them, are my focus. I've covered cameras at PCMag for ...