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Under the early courts, when military conscription had been centrally controlled, military affairs had been taken out of the hands of the provincial aristocracy. But as the system broke down after 792, local power holders again became the primary source of military strength. The re-establishment of an efficient military system was made gradually through a process of trial-and-error. At that time the imperial court did not possess an army but rather relied on an organization of professional warriors composed mainly of oryoshi, which were appointed to an individual province and tsuibushi, which were appointed over imperial circuits or for specific tasks. This gave rise to the Japanese military class. Nonetheless final authority rested with the imperial court.
Warriors appointed for specific tasks were called what?
A: tsuibushi

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LEDs have been developed by Seoul Semiconductor that can operate on AC power without the need for a DC converter. For each half-cycle, part of the LED emits light and part is dark, and this is reversed during the next half-cycle. The efficacy of this type of HP-LED is typically 40 lm/W. A large number of LED elements in series may be able to operate directly from line voltage. In 2009, Seoul Semiconductor released a high DC voltage LED, named as 'Acrich MJT', capable of being driven from AC power with a simple controlling circuit. The low-power dissipation of these LEDs affords them more flexibility than the original AC LED design.
When did non-Seoul Semiconductor release the first high DC voltage LED?
A: unanswerable

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Earth's surface and the clouds absorb visible and invisible radiation from the sun and re-emit much of the energy as infrared back to atmosphere. Certain substances in the atmosphere, chiefly cloud droplets and water vapor, but also carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, and chlorofluorocarbons, absorb this infrared, and re-radiate it in all directions including back to Earth. Thus, the greenhouse effect keeps the atmosphere and surface much warmer than if the infrared absorbers were absent from the atmosphere.
After Earth surface's absorbs radiation, in what spectrum is much of it re-emitted?
A: infrared

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In May 2008, the National Archives announced a five-year agreement to digitize selected records including the complete U.S. Federal Census Collection, 17901930, passenger lists from 18201960 and WWI and WWII draft registration cards. The partnership agreement allows for exclusive use of the digitized records by Ancestry.com for a 5-year embargo period at which point the digital records will be turned over to the National Archives.
Which genealogy website benefits by the May 2008 announcement?
A:
Ancestry.com