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Suspension Bridges - Inca - Andes - New York Times - 0 views

www.nytimes.com/...08bridg.html General inca suspension bridges
shared by Gene Ellis on 19 Feb 15 - Cached
  • “Mexicans discovered vulcanization 3,500 years before Goodyear,” said Dorothy Hosler, an M.I.T. professor of archaeology and ancient technology. “The Spanish had never seen anything that bounced like the rubber balls of Mexico.”
  • Dr. Ochsendorf, a specialist in early architecture and engineering, said the colonial government tried many times to erect European arch bridges across the canyons, and each attempt ended in fiasco until iron and steel were applied to bridge building.
  • The Inca suspension bridges achieved clear spans of at least 150 feet, probably much greater. This was a longer span than any European masonry bridges at the time. The longest Roman bridge in Spain had a maximum span between supports of 95 feet. And none of these European bridges had to stretch across deep canyons.
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  • Similar bridges existed in other mountainous regions of the world, most notably in the Himalayas and in ancient China, where iron chain suspension bridges existed in the third century B.C.”
  • The last existing Inca suspension bridge, at Huinchiri, near Cuzco, is virtually rebuilt each year. People from the villages on either side hold a three-day festival and gather stiff grasses for producing more than 50,000 feet of cord. Finally, the cord is braided into 150-foot replacement cables.
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IEA - December:- Coal's share of global energy mix to continue rising, with coal closin... - 0 views

www.iea.org/...name,34908,en.html coal
shared by Gene Ellis on 09 Jan 14 - No Cached
  • Although the growth rate of coal slows from the breakneck pace of the last decade, global coal consumption by 2017 stands at 4.32 billion tonnes of oil equivalent (btoe), versus around 4.40 btoe for oil, based on IEA medium-term projections. The IEA expects that coal demand will increase in every region of the world except in the United States, where coal is being pushed out by natural gas.
  • “This report sees that trend continuing. In fact, the world will burn around 1.2 billion more tonnes of coal per year by 2017 compared to today – equivalent to the current coal consumption of Russia and the United States combined. Coal’s share of the global energy mix continues to grow each year, and if no changes are made to current policies, coal will catch oil within a decade.” 
  • The report notes that in the absence of a high carbon price, only fierce competition from low-priced gas can effectively reduce coal demand. “The US experience suggests that a more efficient gas market, marked by flexible pricing and fueled by indigenous unconventional resources that are produced sustainably, can reduce coal use, CO
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  • As US coal demand declines, more US coal is going to Europe, where low CO2 prices and high gas prices are increasing the competitiveness of coal in the power generation system.
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Michael Spence explores the causes of partial and stalled economic recoveries. - Projec... - 0 views

www.project-syndicate.org/...nd-stalled-economic-recoveries
shared by Gene Ellis on 19 Feb 15 - No Cached
  • Indeed, recent data suggest that more than half of the acceleration in US growth is occurring on the tradable side, even though it accounts for only about one-third of the economy. And that contribution is probably an underestimate, because income generated on the tradable supply side produces income that becomes demand on the non-tradable side – a multiplier effect that crosses the tradable/non-tradable boundary.
  • the main problem is that public-sector investment remains well below growth-sustaining levels. The hard part of fully realizing potential growth is shifting the composition of domestic demand from consumption to investment without adding leverage. That means paying for it on the public-sector side, via taxes and a reduction in household consumption (and in wealth accumulation).
  • But such adjustments cannot happen in a monetary union, so unit labor costs are slowly re-converging via a protracted process of flat nominal wage growth and slowly declining real wages (a process that would be quicker with higher inflation in Germany and Northern Europe).
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To Lower Tariffs, Vietnam Pushes for Easing Trade Rules - NYTimes.com - 0 views

www.nytimes.com/...es-for-easing-trade-rules.html trade rules Vietnam Europe
shared by Gene Ellis on 19 Feb 15 - No Cached
  • Europe generally requires what is known as a “double transformation” in goods for them to be considered made in a certain region. In the case of clothing, one step, or “transformation,” would be weaving yarn into a fabric. A second transformation would be assembling the fabric into a garment. The United States requires a “triple transformation” that extends back to the production of yarn from synthetic or natural fibers, like cotton.
  • Lien Phat Ltd.'s factory,
  • Its supplies are imported. “I mainly take orders from international corporations, who give us materials and designs,” said Truong Thi Thuy Lien, the owner of Lien Phat. “Usually the clients will designate us to certain suppliers, most of them are in China.”
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  • “I don’t deal with the exporting process. I take the order and deliver the goods to the port” in Ho Chi Minh City, she said. “The rest lies with my clients.” <img src="http://meter-svc.nytimes.com/meter.gif"/>
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The Poor Need Cheap Fossil Fuels - NYTimes.com - 0 views

www.nytimes.com/...r-need-cheap-fossil-fuels.html coal gas
shared by Gene Ellis on 09 Dec 13 - No Cached
  • In sub-Saharan Africa, for instance, excluding South Africa, the entire electricity-generating capacity available is only 28 gigawatts — equivalent to Arizona’s — for 860 million people. About 6.5 million people live in Arizona.
  • Over the last 30 years, China moved an estimated 680 million people out of poverty by giving them access to modern energy, mostly powered by coal. Yes, this has resulted in terrible air pollution and a huge increase in greenhouse gas emissions. But it is a trade-off many developing countries would gratefully choose.
  • Today, 81 percent of the planet’s energy needs are met by fossil fuels, and according to the International Energy Agency, that percentage will be almost as high in 2035 under current policies, when consumption will be much greater. The unfortunate fact is that many people feel uncomfortable facing up to the undeniable need for more cheap and reliable power in the developing world.
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  • Because burning natural gas emits half the carbon dioxide of coal, this technology has helped the United States reduce carbon dioxide emissions to the lowest level since the mid-1990s
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