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David Lewis' School Material
A collection of David Lewis' primary and secondary student workbooks, looseleaf written work, exam papers, school diaries, textbook and other miscellaneous items.
David Lewis
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David Lewis
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David Lewis
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Development and Demonstration of a Flutter-suppression System Using Active Controls
The application of active control technology to suppress flutter has been demonstrated successfully in the Langley transonic dynamics tunnel with a delta-wing model. The model was a simplified version of a proposed supersonic transport wing design. An active flutter-suppression method based on an aerodynamic energy criterion has been verified by using three different control laws. The first two control laws utilized both leading-edge and trailing-edge active control surfaces, whereas the third control law required only a single trailing-edge active control surface. At a Mach number of 0.9 the experimental results demonstrated increases in the flutter dynamic pressure from 12.5 percent to 30 percent with active controls. Analytical methods were developed to predict both open-loop and closed-loop stability, and the results agreed reasonably well with the experimental results.
Soul of the New Consumer
The New Consumer's Revolution: * Why buzz beats hype * Why cheap is chic * Why brands must be authentic * Why segmentation is dead * Why advertising must reinvent itself * Why New Consumers loathe 'doing the shopping' * Why individuals' Tastespace will triumph in the marketplace New Consumers are revolutionizing the world of business, our culture and social expectations. No longer confined by gender, age, ethnicity or income, they are breaking down barriers, shattering stereotypes and redefining the very meaning of consumerism and the marketplace. From traditional to online retailing, from tracking coolhunters to exploring tastepace, The Soul of the New Consumer unearths the very essence of ...
