A fluid dynamic investigation of the Big Blade and Macon oar blade designs in rowing propulsion

The purpose of this investigation was to examine the fluid dynamic characteristics of the two most commonly used oar blades: the Big Blade and the Macon. Scaled models of each blade, as well as a flat Big Blade, were tested in a water flume using a quasi-static method similar to that used in swimming and kayaking research. Measurement of the normal and tangential blade forces enabled lift and drag forces generated by the oar blades to be calculated over the full range of sweep angles observed during a rowing stroke. Lift and drag force coefficients were then calculated and compared between blades. The results showed that the Big Blade and Macon oar blades exhibited very similar characteristics. Hydraulic blade efficiency was not therefore found to be the reason for claims that the Big Blade could elicit a 2% improvement in performance over the Macon. The Big Blade was also shown to have similar characteristics to the flat plate when the angle of attack was below 90 degrees , despite significant increases in the lift coefficient when the angle of attack increased above 90 degrees . This result suggests that the Big Blade design may not be completely optimized over the whole stroke.     

Designing an “Architecture of Information”— The United States Holocaust Memorial Museum

For the permanent exhibition at the United States Holocaust Memorial Museum the design approach was minimal and transparent, and the designers were in dialogue only with the story — not with the history of design or the conventions governing most museum presentations. We reached for a sense of immersion by trying to erase the seams between exhibits and architecture. Display strategies included the removal of conventional barriers of certain glass-encased vitrines: some objects can be touched, and reactions sought are as visceral as they are intellectual. We tried above all to see that people leave the museum not profoundly dejected but with some other feeling evoking the resilience of life and hope. The design intended to make the environment so united with its subject that memory of the museum experience and the sharing of memory through discussion will carry on in the lives of the visitors.     

Compelled Disclosure of Scientific Research Data

Federal legislation requires that research produced with federal funding be available to the public under the Freedom of Information Act. I raise a concern that this power might be used to harass scientists. The goal of data sharing, however, is important, and should be facilitated through electronic data archiving.