## Balls and Bins

Assume there are $$m$$ balls and $$n$$ bins. We denote $$\eta_{i}^b$$ the event that ball $$i$$ falls into bin $$b$$, and denote $$\epsilon_{ij}$$ the event that balls $$i$$ and $$j$$ collide. [more]

## ns3: ASCII trace to stdout

The way demonstrated in examples to put ASCII trace into a file: AsciiTraceHelper ascii; p2p.EnableAsciiAll (ascii.CreateFileStream ("tcp-star-server.tr")); To output to stdout (or other existing std::ostream object), use the following instead: pointToPoint.EnableAsciiAll (Create&lt;OutputStreamWrapper&gt;(&amp;std::cout)); [more]

## Mac OS X Lion

To celebrate the release of Mac OS X Lion, I bought a 750GB HDD to upgrade my MBP, and install the new OS X. Installing the Lion is not smooth, but all is done now. Below are some random hassles that I encountered: [more]