Download America Transformed: Engineering and Technology in the by Dean A. Herrin PDF

By Dean A. Herrin

ISBN-10: 0784405298

ISBN-13: 9780784405291

From a fledgling agrarian country clinging to the Atlantic seaboard in 1800, the USA through the 1900s used to be the world's top business state, production a 3rd of the world's business output. via approximately two hundred photos and drawings, the USA reworked: Engineering and expertise within the 19th Century highlights not just the most obvious icons of feat reminiscent of the Brooklyn Bridge and Erie Canal but additionally the improvement of the nation's commercial, production, and transportation infrastructure. improvement and innovation in mining; cloth, iron and metal generators; water remedy, strength and irrigation platforms, canals, railroads and bridges all served to remodel American lifestyles. In 1969 the nationwide Park carrier, the Library of Congress, and the yankee Society of Civil Engineers shaped the historical American Engineering checklist (HAER) application to record nationally and locally major engineering and business websites. HAER documentation--in the different types of measured and interpretive drawings, large-format photos, and written histories--record for posterity the large old engineering and commercial legacy of the U.S.. utilizing those assets, Dean Herrin has created a visible sampler of America's nineteenth-century engineering and know-how that illuminates the scope and diversity of America's business transformation

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Extra resources for America Transformed: Engineering and Technology in the Nineteenth Century : Selections from the Historic American Engineering Record, National Park Service

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His political thesis was that “a remarkable consensus concerning the legitimacy of liberal democracy as a system of government had emerged throughout the world over the past few years, as it conquered rival ideolo- Approaches to Earthquake Engineering History 27 gies like hereditary monarchy, fascism, and most recently communism. More than that, however, I argued that liberal democracy may constitute the ‘end point of mankind’s ideological evolution’ and the ‘final form of human government,’ and as such constituted the ‘end of history’” (Fukuyama 1993, p.

Joseph Penzien (Penzien 2004, p. 86) can be instructively quoted at some length in his answer to the question, Will there be revolutionary changes in earthquake engineering over the next 50 years? Well, I can’t predict the future, I can only hazard a guess. I would say no, the changes during the next 50 years will be incremental, not revolutionary, which is not to boast about what people of my generation accomplished. You have to realize where we were starting from—there was so little known, so much to discover.

Risk-based thinking is at the heart of the field and always has been, though the way it has been treated in seismic design evolved significantly over the past 100 years. Studies of completed construction have found that there is in fact some error in calculated dead loads, the gravitational forces exerted on the structure due to the deadweight of the construction itself. Even the simple, unchanging fact about how much a building or bridge weighs is at heart a probabilistic issue, though a minor probabilistic issue compared with the calculation of earthquake forces.

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