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Others drove themselves back to medievalism. And of course, most races eventually exterminated themselves, at least within their single solar system. Those that didn't exterminate themselves (and even a few of those that did) eventually struggled back to their original heights. The study of these variations was called the Applied History of Technology. Unfortunately for both academicians and the civilizations in the Slow Zone, true applications were a bit rare: The events of the case studies were centuries old before news of them reached the Beyond, and few researchers were willing to do field work in the Slow Zone,复件 (88) air max1, where finding and conducting a single experiment could cost them much of their lives. In any case, it was a nice hobby for millions of university departments. One of the favorite games was to devise minimal paths from a given level of technology back to the highest level that could be supported in the Slowness. The details depended on many things,Beats by Lady Gaga (Bright Chrome) High Performance In-Ear H, including the initial level of primitiveness, the amount of residual scientific awareness (or tolerance), and the physical nature of the race. The historians' theories were captured in programs whose inputs were facts about the civilization's plight and the desired results, and whose outputs were the steps that would most quickly produce those results. Two days later,复件 (45) air max1,mbt sport 2, the four of them were back on the OOB's bridge. And this time we're all talking. "So we must decide what inventions to shoot for, something that will defend the Hidden Island Kingdom --" "-- and something 'Mister Steel' can make in less than one hundred days," said Blueshell. He had spent most of the last two days fiddling with the development programs in OOB's library. "I still say guns and radios," said Pham. Firepower and communications. Ravna grinned at him. Pham's human memories alone would be enough to save the kids on Tines World. He hadn't talked any more of Old One's plans. Old One's plans ... in Ravna's mind those were something like fate, perhaps good, perhaps terrible, but unknown for now. And even fate can be weaseled. "How about it, Blueshell?" she said. "Is radio something they can produce quickly, from a standing start?" On Nyjora, radio had come almost contemporary with orbital flight -- a good century into the renaissance. "Indeed, My Lady Ravna. There are simple tricks that are almost never noticed till a very high technology is attained. For instance, quantum torsion antennas can be built from silver and cobalt steel arrays, if the geometry is correct. Unfortunately, finding the proper geometry involves lots of theory and the ability to solve some large partial differential equations. There are many Slow Zoners who never discover the principle." "Okay,复件 (4) 复件 air max2," said Pham. "But there's still a translation problem. Jefri has probably heard the word 'cobalt' before, but how can he describe it to people who don't have the referent? Without knowing a lot more about their world, we couldn't even describe how to find cobalt- bearing ore." "That will slow things down,mbt changa shoes," Blueshell admitted. "But the program accounts for it. Mr. Steel seems to understand the concept of experimentation. For cobalt, we can provide him with a tree of experiments based on descriptions of likely ores and appropriate chemical tests." "It's not quite that simple," said Greenstalk. "Some of the chemical tests themselves involve search/test trees. And there are other experiments needed to check toxicity. We know far less about the pack creatures than is usual with this program." Pham smiled. "I hope these creatures are properly grateful; I never heard of 'quantum torsional antennas'.