notes.husk.org. scribblings by Paul Mison.

The organisation chart for the Manhattan Project (via)

F-111F GBU-10 preparing to bomb Libya, evening, 14 April 1986:

A ground crew prepares a 48th Tactical Fighter Wing F-111F aircraft for a retaliatory air strike on Libya. An arming supervisor gives hand signals to the pilot of the aircraft as the crewman under the wing pulls arming pins out of the GBU-10 modular glide bombs. The crewman by the landing gear is checking for foreign objects on the runway that might be sucked into an engine before takeoff. RAF Lakenheath, England.

James A. Jimenez, Above and Beyond: Take A Left at Portugal:

My previous longest mission had been 4.5 hours; the planned route around Spain and back would take more than 13.

Coverage of the BMEWS (red) and PAVE-PAWS (blue) early warning radar systems. Flyingdales is one of the BMEWS stations.

Sea-Based X-Band Radar. Wikipedia:

The Sea-Based X-Band Radar is mounted on a fifth generation Norwegian-designed, Russian-built CS-50 twin-hulled semi-submersible drilling rig. The hull was originally built at Vyborg Shipyard, hull number 101. Conversion of the vessel was carried out at the AmFELS yard in Brownsville, Texas; the radar mount was built and mounted on the vessel at the Kiewit yard in Ingleside, Texas. It is nominally based at Adak Island in Alaska but can roam over the Pacific Ocean

The SBX failed during a flight test on January 31, 2010, designated FTG-06. The test was a simulation of a North Korean or Iranian missile launch. The test failure arose from two factors, the first being that algorithms in the SBX radar software which are designed to filter out extraneous information from the target scene were left disengaged for the test, and the second was a mechanical failure in a thruster on the kill vehicle.

During flight test FTG-06a on December 15, 2010, the SBX performed as expected, but intercept of the target missile was again not achieved.

Höghusen in Stockholm, under construction (as seen on Wikipedia). Photograph: Lennart av Petersens.

Billion Laughs:

The example attack consists of defining 10 entities, each defined as consisting of 10 of the previous entity, with the document consisting of a single instance of the largest entity - which expands to 1 billion copies of the first entity. In the most frequently cited example, the first entity is the string “lol”, hence the name “billion laughs”.

After all the entity expansions have been processed, this small (< 1 KB) block of XML will actually contain a billion “lol”s, taking up almost 3GB of memory.

A plot of sin z from x,y from -π to π in z=x+iy.

Saturation indicates absolute magnitude, brightness represents real and imaginary magnitude.

cloois:

The knight can visit each square on a chess board exactly once.

Knight’s Tour. Knight’s Tour anim:

SVG frames created by using chesstour-svg.pl 

e8 g7 h5 f6 e4 g3 h1 f2 d1 b2 a4 c3 d5 b6 a8 c7 b5 a7 c8 d6 c4 a3 b1 d2 f1 h2 g4 e3 f5 h6 g8 e7 c6 d8 b7 a5 b3 a1 c2 d4 f3 e1 g2 h4 g6 h8 f7 g5 h7 f8 e6 f4 h3 g1 e2 c1 a2 b4 d3 c5 a6 b8 d7 e5

(via notational)