Issue II

The Trebuchet

2017-11-11T03:08:48-08:00 September 5th, 2005|History & Society, Issue II, Mechanical Engineering, Security & Defense, Volume IX|

The medieval battlefield was dominated by large artillery weapons, and among these the trebuchet was king. This massive weapon was eventually capable of throwing massive boulders over 250 meters, but it did not start that way. It took over 1000 years of innovation, experimentation, and modification to transform a moderately effective projectile-throwing machine into an [...]

A Chemical Engineer’s Guide to Cleaning Just About Anything

2017-11-11T03:01:23-08:00 September 5th, 2005|Chemical Engineering, Issue II, Lifestyle, Volume IX|

When people kneel down to scrub the stains out of their bathtubs or struggle to remove the coffee grounds from their kitchen counters, they are probably not thinking about the complicated chemical reactions that are happening just beneath their hands. The cleaning supplies that we all use, from simple soaps to detergents to vinegars and [...]

Security Versus Privacy: The Engineering of X-Ray Vision

2017-11-11T03:05:31-08:00 July 11th, 2005|Electrical Engineering, Issue II, Security & Defense, Volume IX|

In the post-September 11 era, engineers have developed new technologies to meet growing safety and security concerns at the world's airports. The drawbacks of existing security measures - especially physical pat downs - have provided a foundation for "backscatter" X-ray technology. Information offered by the Transportation Security Administration and American Science and Engineering, Inc., demonstrate [...]