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...work at the lunar surface. Meanwhile, Michael Collins circled the Moon in the ­command module, perhaps best-positioned to contemplate the meaning of life or our place in the universe. Down at the lunar surface, ­Armstrong and Aldrin performed several experiments, but arguably their most important task was to collect the first ever samples of Moon rock. Apollo 11...

...width of weld, the helium NV technique giving a narrower, deeper weld, or an increased work distance. Process is ideal for automation, since there is no electrical or mechanical contact between the workpiece and electron beam. Small spot size requires a close and accurate fit of components, hence fixturing and beam/workpiece control are critical. Production rates depend on technique used, chamber size, pump size, component ......

...work on the 2.4 Gigahertz microwave radio spectrum.. The term Hertz means the number of waves per second, so 1 Hertz is one wavelength per second. Your FM radio station may use 100 Megahertz, or 100,000,000 waves per second, while 2.4 Gigahertz, used by wireless, is 2,400,000,000 waves per second, making the radio waves used by wi-fi considerably shorter. Essentially,...