SPACE WATCH – Follow @theNetEconomy
NASA – Because of the absence of gravity, fuels burning in space behave very differently than they do on Earth. In this image, a 3-millimeter diameter droplet of heptane fuel burns in microgravity, producing soot. When a bright, uniform backlight is placed behind the droplet and flame and recorded by a video camera, the soot appears as a dark cloud. Image processing techniques can then quantify the soot concentration at each point in the image. On the International Space Station, the Flame Extinguishing Experiment examines the combustion of such liquid fuel droplets.
This colorized gray-scale image is a composite of the individual video frames of the backlit fuel droplet. The bright yellow structure in the middle is the path of the droplet, which becomes smaller as it burns. Initial soot structures (in green) tend to form near the liquid fuel. These come together into larger and larger particles which ultimately spiral out of the flame zone in long, twisting streamers.
By Devin Leonard – The USPS is a wondrous American creation. Six days a week it delivers an average of 563 million pieces of mail—40 percent of the entire world’s volume.
By Nate Anderson – “The AT&T/T-Mobile deal is like a telecommunications time machine that would send consumers back to a bygone era of high prices and limited choice,” said Rep. Ed Markey (D-MA). “AT&T and Verizon have divided the nation into Bell East and Bell West. Approving consolidation of the number of nationwide carriers from 4 to 3 and then inevitably to 2 would return consumers to a duopoly in the national wireless market. This would be an historic mistake.”
