Routine design When we think of bridges, it is the dramatic and monumental long spans that come to mind first, especially the lithe suspension bridges such as the Golden Gate and the pure geometric arches such as Sydney Harbour. But the majority of bridges are not such spectacular structures. Most of them are ordinary overpasses, with spans of 30 or 40 feet, carrying roadways or rails across other thoroughfares or over small streams. You see such bridges by the dozen on any drive down the Interstate. They may be lacking in glamour, but they are more representative of a bridge builder's art. The engineering and construction of girder bridges are pretty routine these days, but the bridges are not quite standard items you order from a catalogue. The girders, whether of steel or concrete, are custom-build for each bridge, then trucked to the site and hoisted into place with a crane. The designer still has scope for variation and creativity, and it shows out on the highways: some overpasses are prettier than others. Brian Hayes, Infrastructure: A Guide to the Industrial Landscape engineeringdesignautomationroutine
The illustrated guide to a Ph.D. An Article by Matt Might matt.might.net Show image 0 Show image 1 Imagine a circle that contains all of human knowledge. By the time you finish elementary school, you know a little. By the time you finish high school, you know a bit more. With a bachelor's degree, you gain a specialty. A master's degree deepens that specialty: Reading research papers takes you to the edge of human knowledge. Once you're at the boundary, you focus. You push at the boundary for a few years. Until one day, the boundary gives way. And, that dent you've made is called a Ph.D.. Of course, the world looks different to you now. So, don't forget the bigger picture. Keep pushing. knowledgescienceprogressresearch