The motion characteristics of the VIRTTEX motion system were measured using a set of tests similar to those suggested in AGARD Report AR-144. The measurements were devised to measure the performance of existing motion systems, aid in the procurement of new motion systems, and help identify root causes of poor performance. Transfer functions (both within degree-of-freedom and between degree-of-f...

This paper presented methods to determine the aerodynamic forces that acton an aircraft wing during flight. These methods are initially proposed for asimplified two degree-of-freedoms airfoil model and then are extensivelyapplied for a multi-degree-of-freedom airfoil system. Different airspeedconditions are considered in establishing such methods. The accuracy of thepresented methods is verifie...

Recognizing the advantages of primary care as a means of improving the entire health system, this text comments on reforms of publicly funded primary health centers, and the rapid development of private forprofit providers in Sweden. Many goals and expectations are connected to such reforms, which equally require critical analyses of scarce resources, professional trust/motivation and business ...

That’s what makes the report from Philadelphia so exciting. It’s the latest in a small but growing series of studies that point to the first signs of declining rates of obesity among children in places like New York City and California (2,3). In New York City, declines were seen citywide, but the largest changes were among white and Asian students, who already had the lowest rates (2). In Calif...