Problem: Due to the work nature of airline pilots, who often cross several timezones and regions of sunlight and darkness in one day, and spend many hours awake both day and night, they are often unable to maintain sleep patterns that correspond to the natural human circadian rhythm; this situation can easily lead to fatigue. The NTSB cites this as contributing to many accidents[unreliable medical source?] and has conducted several research studies in order to find methods of combating fatigue in pilots.
What has the NTSB conducted to find the cause of pilot fatigue?
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Answer: research studies

Problem: Dell's manufacturing process covers assembly, software installation, functional testing (including "burn-in"), and quality control. Throughout most of the company's history, Dell manufactured desktop machines in-house and contracted out manufacturing of base notebooks for configuration in-house. The company's approach has changed, as cited in the 2006 Annual Report, which states, "We are continuing to expand our use of original design manufacturing partnerships and manufacturing outsourcing relationships." The Wall Street Journal reported in September 2008 that "Dell has approached contract computer manufacturers with offers to sell" their plants. By the late 2000s, Dell's "configure to order" approach of manufacturingdelivering individual PCs configured to customer specifications from its US facilities was no longer as efficient or competitive with high-volume Asian contract manufacturers as PCs became powerful low-cost commodities.
Where did Dell scrap their notebooks?
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Answer: unanswerable

Problem: Suger, friend and confidant of the French Kings, Louis VI and Louis VII, decided in about 1137, to rebuild the great Church of Saint-Denis, attached to an abbey which was also a royal residence. He began with the West Front, reconstructing the original Carolingian facade with its single door. He designed the facade of Saint-Denis to be an echo of the Roman Arch of Constantine with its three-part division and three large portals to ease the problem of congestion. The rose window is the earliest-known example above the West portal in France. The facade combines both round arches and pointed arches of the Gothic style.
Which portion the cathedral was the reconstruction of the great Church of Saint-Denis begun?
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Answer:
the West Front