# Older blog entries for amatus (starting at number 94)

A solution to the 12 coins problem: 1 L-- 2 LL- 3 LR- 4 L-L 5 R-L 6 RRR 7 RLR 8 RLL 9 --R 10 L 11 -RR...

A solution to the 12 coins problem:
1 L--
2 LL-
3 LR-
4 L-L
5 R-L
6 RRR
7 RLR
8 RLL
9 --R
10 L
11 -RR
12 -RL
#cleaningscrapsofpaperoffmydesk

Syndicated 2012-12-06 03:20:14 from David Barksdale - Google+ Posts

If you have a unit interval and you want to know how many ways you can divide it such that division marks...

If you have a unit interval and you want to know how many ways you can divide it such that division marks are at m/2^n and the divisions are sorted from smallest to largest, use this recurrence relation:
a[0] = 1
a[n] = 1 + sum_{i=0}^{n-1} {2^(i(n-i-1))a[i]}
#cleaningscrapsofpaperoffmydesk

Syndicated 2012-12-06 03:01:38 from David Barksdale - Google+ Posts

If you have an n by m grid of points, you can connect 4 points to make a square in (2mn^3-2mn-2n^4+n^...

If you have an n by m grid of points, you can connect 4 points to make a square in (2mn^3-2mn-2n^4+n^2)/12 different ways.
#cleaningscrapsofpaperoffmydesk

Syndicated 2012-12-06 02:52:15 from David Barksdale - Google+ Posts

Apparently Rosencrantz was flipping a coin with Bose-Einstein statistics.

Apparently Rosencrantz was flipping a coin with Bose-Einstein statistics.

 This Quantum World | Quantum coins and quantum diceA comparison of the behavior of ordinary coins and dice with that of quantum coins and dice (bosonic as well as fermionic).

Syndicated 2012-11-29 18:35:29 from David Barksdale - Google+ Posts

I remember seeing this comet at the McDonald Observatory.

I remember seeing this comet at the McDonald Observatory.

 Comet Hyakutake - Wikipedia, the free encyclopediaHyakutake became visible to the naked eye in early March 1996. By mid-March, the comet was still fairly unremarkable, shining at 4th magnitude with a tail about 5 degrees long. As it neared its closes...

Syndicated 2012-11-28 19:46:45 from David Barksdale - Google+ Posts

I believe his point about just-in-time delivery making our industry very fragile.

I believe his point about just-in-time delivery making our industry very fragile.

Syndicated 2012-11-26 04:05:23 from David Barksdale - Google+ Posts

Fabbing a chip that could encode data in a twisted vortex of light

Fabbing a chip that could encode data in a twisted vortex of light
Tiny silicon-based device shapes twists photons for communication purposes

Syndicated 2012-10-30 19:38:11 from Google+ List of Activities for Collection PUBLIC

We are internationally wireless! – Blog – wlan slovenija

We are internationally wireless! – Blog – wlan slovenija
Bringing people and their communities together is exciting, doing so wirelessly even more. Community networks FunkFeuer from Austria, NEDWireless from Croatia, and wlan slovenija have been connected w...

Syndicated 2012-10-30 19:21:49 from Google+ List of Activities for Collection PUBLIC

85 older entries...