Daily Archives: May 20, 2013

NASA technology (49)


Supersonic Noise

NASA – The Twin Rectangular Jet model, installed on the Nozzle Acoustic Test Rig in the Aeroacoustic Propulsion Laboratory at NASA’s Glenn Research Center, is being tested to determine the acoustic impact of engine configurations on low sonic boom aircraft for the High Speed Project of the Fundamental Aeronautics Program.

The High Speed Project is a multi-center effort to develop and test the technologies of a new generation of aircraft that can fly at supersonic speeds. Glenn’s research involves predicting the airport noise of these novel aircraft by examining innovative airframes and propulsion integration that are different from the conventional tube-and-wing aircraft observed at commercial airports.

Inside the aeroacoustic dome, this generic, low-fidelity aircraft engine exhaust model features twin rectangular nozzles. Researchers are investigating the impact of having the propulsive exhaust come from the slot nozzles atop the aircraft. Testing the proposed components of these high- speed aircraft will help manufacturers meet the noise standards required around the nation’s airports.

Image Credit: NASA/Bridget R. Caswell

6 Questions Everyone Should Ask The IRS

By Robert W. Wood – The lackluster IRS testimony so far suggests we may never know what happened, who did what, who knew, when they knew and worse. Confusion and Staff Troubles Rife at I.R.S. Office in Ohio.

Amid all the noise, many Americans should ask simpler questions:

  • Why is the tax law so horribly complex?
  • Can I feel secure that I will be dealt with fairly by the IRS?
  • Doesn’t the IRS police its employees?
  • Why does it seem that there’s always someone getting away with something in the tax world?
  • Can I feel secure that my private taxpayer information will remain private?
  • Why is staying off the IRS radar so important?

more> http://tinyurl.com/bc4q3rc

Yahoo! Board Approves Billion-Dollar Tumblr Deal

By Sam Gustin – Tumblr has long been considered a major prize, so it’s no surprise that Yahoo! isn’t the only one interested in the company. Tumblr has also reportedly held talks with both Facebook and Microsoft, according to Forbes. Of course, Tumblr CEO David Karp may decide to hold out — he’s reportedly raising a new venture capital round that values the company at $1 billion. Or he may opt for a “strategic investment,” in which Yahoo! or some other big company invests in Tumblr, which would then remain independent. Tumblr has already raised $125 million at an $800 million valuation. more> http://tinyurl.com/cmjo8aw


The US Market & Design for Test

By W. Scott Fillebrown – The challenge is that the US market is made up of high-technology/low production quantity assemblies. In many circuit bed of nails cases, test is not an option because of development time, cost and the difficulty associated with finding a place for a 30-40 mil test point.

Depending on the technology, the challenge can be as simple as making minor design changes that can happen at the gerber level to requiring a significant revision to the board in question. First let’s conquer the simple. For analog, RF and lower technology digital boards the approach is the simplest. Typically, straightforward flying probe test is the answer. more> http://tinyurl.com/cdnzdlr

Rejoice! The End of ‘User Name and Password’ May Be Nigh

By Christopher Matthews – A consortium of tech companies, including PayPal and Google, have joined together to dream up the future of passwords. And the future, according to this FIDO Alliance (which stands for Fast Identity Online) is to have no passwords at all. more> http://tinyurl.com/mus7ewr



CONGRESS WATCH The IRS’s Job Is To Violate Our Liberties, Ron Paul