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Comment: Heuristic Algorithm (Score 1) 514

by Len (#37006930) Attached to: The Mathematics of Lawn Mowing

Examination of the example in the article suggests a heuristic algorithm that should provide near-optimal solutions and is suitable for real-time execution on neural wetware.

1. Start by mowing around the outside border.
2. Proceed going around, from the outside in.
3. When you reach a strip <= 3 mowers wide, clear it with short back-and-forths.

Proof of an upper bound on excess mowing vis-a-vis the optimal solution is left as an exercise for the reader.

Comment: Not "any" threats (Score 2, Funny) 54

by Len (#32691066) Attached to: 1,400 Megapixel Pan-STARRS Telescope Comes Online

The article says Pan-STARRS can "identify any potential threats to Earth", but it can only find asteroids and comets that are about to hit us. They don't claim to be able to spot other threats, such as:

  • Dalek invasion fleet
  • Berserker machines
  • Chain reaction of supernovae
  • Radiation front from the collapse of the galactic core
  • Borg attack from the future
  • Galaxy-wide iPhone recall

Stupid gadget blogs, over-hyping stuff as usual.

The Military

USAF's Robotic X-37B Orbiter Launched For Test Flight 145

Posted by timothy
from the hope-no-one-fell-asleep-inside dept.
An anonymous reader writes with this excerpt: "The United States Air Force's novel robotic X-37B space plane is tucked inside the bulbous nose cone of an unmanned rocket that blasted off Thursday from Florida on a mission shrouded in secrecy. ... The unmanned military Orbital Test Vehicle 1 (OTV-1) — also known as the X-37B — lifted off at 7:52 pm EDT atop an Atlas 5 rocket on a mission that is expected to take months testing new spacecraft technologies. ... Key objectives of the space plane's first flight include demonstration and validation of guidance, navigation, and control systems – including a 'do-it-itself' autonomous re-entry and landing at California's Vandenberg Air Force Base with neighboring Edwards Air Force Base as a backup."
Programming

Graph-View of Collaborative Development At GitHub 14

Posted by timothy
from the better-art-than-most-coffee-shops dept.
VindictivePantz writes "In an interesting graphical view on collaborative development, FlowingData writes: 'GitHub is a large community where coders can collaborate on software development projects. People check code in and out, make edits, etc. Franck Cuny maps this community (with Gephi), based on information in thousands of user profiles.'"

Dyslexia means never having to say that you're ysror.

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