Wednesday, December 31, 2014
Tuesday, December 30, 2014
"The Extreme Accuracy Tasked Ordnance (EXACTO) system seeks to improve sniper effectiveness and enhance troop safety by allowing greater shooter standoff range and reduction in target engagement timelines. The objective of the EXACTO program is to revolutionize rifle accuracy and range by developing the first ever guided small-caliber bullet. The EXACTO 50- caliber round and optical sighting technology expects to greatly extend the day and nighttime range over current state-of-the-art sniper systems. The system combines a maneuverable bullet and a real-time guidance system to track and deliver the projectile to the target, allowing the bullet to change path during flight to compensate for any unexpected factors that may drive it off course."
Monday, December 29, 2014
Tuesday, December 23, 2014
Monday, December 15, 2014
Saturday, December 6, 2014
"This whole skating season's been incredible. I've been out for nine days in a row. We went through 11 lakes and rivers one day. We only needed to walk 1.2 km of the stretch of four mil, the rest went to go on fine ice. "
Friday, December 5, 2014
... Fails at T-10 seconds and freezes while buffering! All I get is a few frames like this mid launch. Maybe with a few billion dollars more they will master late 1990's video streaming technology.
"Vortices created by the imbalance of a centrifugal force and a radial pressure gradient in a curved pipe move fluid from the inner wall (left side) towards the outer wall. These so called 'Dean vortices' (referring to the two symmetric structures in the rightmost figure) are common features of flows in curved geometries and occur in nature, such as in rivers, and technical applications, such as in heat exchangers and piping systems, where they are sometimes specifically generated for particle separation or filtration purposes.
By measuring the speed of tracer particles it is possible to obtain snapshots of the three dimensional velocity field in a cross plane and thereby capture the unsteady behavior of the vortices under turbulent flow conditions. Surrounded by an irregular and chaotic environment, the couple of 'undetermined' vortices appears to 'dance.' Sometimes they dance together while at other times one of them is taking the lead by swinging its partner (referring to the three snapshots to the left). Nonetheless, on average, they successfully manage to keep up an ordered, laminar-like, appearance as a harmonic couple."
Wednesday, December 3, 2014
"On October 14, 1966, a "boilerplate" full Saturn V and Apollo spacecraft stack inside the Vehicle Assembly Building is rocked back and forth by employees pushing with their feet and pulling with a rope so that stability and stresses which might result from winds at the launch pad can be measured. During the test the escape tower at the top of the Saturn V broke off and fell, but no one was injured."