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On Subscale Flight Testing
Downscaled physical models, also referred to as subscale models, have played an essential role in the investigation of the complex physics of flight until the recent disruption of numerical simulation. Despite the fact that improvements in computational methods are slowly pushing experimental techniques towards a secondary role as verification or calibration tools, real-world testing of physical prototypes still provides an unmatched confidence. Physical models are very effective at revealing issues that are sometimes not correctly identified in the virtual domain, and hence can be a valuable complement to other design tools. But traditional wind-tunnel testing cannot always meet all of the ...
For the Good of the Game
A New York Times bestseller Foreword by Doris Kearns Goodwin The longtime Commissioner of Major League Baseball provides an unprecedented look inside professional baseball today, focusing on how he helped bring the game into the modern age and revealing his interactions with players, managers, fellow owners, and fans nationwide. More than a century old, the game of baseball is resistant to change—owners, managers, players, and fans all hate it. Yet, now more than ever, baseball needs to evolve—to compete with other professional sports, stay relevant, and remain America’s Pastime it must adapt. Perhaps no one knows this better than Bud Selig who, as the head of MLB for more than twenty ...
Design and Predictions for a High-altitude (low-Reynolds-number) Aerodynamic Flight Experiment
A sailplane being developed at NASA Dryden Flight Research Center will support a high-altitude flight experiment. The experiment will measure the performance parameters of an airfoil at high altitudes (70,000 to 100,000 ft), low Reynolds numbers (200,000 to 700,000), and high subsonic Mach numbers (0.5 to 0.65). The airfoil section lift and drag are determined from pitot and static pressure measurements. The locations of the separation bubble, Tollmien-Schlichting boundary layer instability frequencies, and vortex shedding are measured from a hot-film strip. The details of the planned flight experiment are presented. Several predictions of the airfoil performance are also presented. Mark Drela from the Massachusetts Institute of Technology designed the APEX-16 airfoil, using the MSES code. Two-dimensional Navier-Stokes analyses were performed by Mahidhar Tatineni and Xiaolin Zhong from the University of California, Los Angeles, and by the authors at NASA Dryden.
Product Design and Manufacture
Selected, peer reviewed papers from the 2011 International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2011), November 18-20, 2011, Shenzhen, China
I Am the Word
The channeled Guides of I Am the Word provide a concise and immensely powerful program in self-awareness that can ease negative complexes and align your existence with its highest purpose. Humanity has lost itself. Both as individuals and as a world culture, we have forgotten our true nature. In I Am the Word, writer and medium Paul Selig has recorded an extraordinary program for self- realization, as dispensed through beings of higher intelligence, sometimes called Guides or Ascended Masters. These figures seek, as they have in the past, to assist men and women in discovering the higher, purposeful nature-or "Christed Self"-that lies dormant within us all. In a series of enticing, irresistibly practical dialogues, the Guides of I Am the Word identify the emotional "boulders" that displace our authentic selves and consume our potential. The Guides provide to-the-point psychological and existential insights, along with self-developing exercises and affirmations, which begin to strip away residues of fear, self-doubt, and self-suffocating habits.
Electrical Insulating Materials and Electrical Engineering
Selected, peer reviewed papers from the 2012 International Conference on Electrical Insulating Materials and Electrical Engineering, (EIMEE 2012), May 25-27, 2012, Shenyang, Liaoning, China
