年终发几条笑话

国学一：

学生进私塾，先生先教“天子重英豪，文章教尔曹”。学生问：“这尔曹是什么意思？” 先生说：“尔就是你、汝，曹就是辈、们，你们说说看，尔曹指谁？” 学生们齐声答道：“我曹！”

——马伯庸

国学二：

『古文』逝者如斯夫，不舍昼夜。
『白话文』死去的人就像她的丈夫，不管是白天，还是黑夜，（都像）。

笑话三：

I might be watching you!

I bought a webcam during my last trip to China. When inserted it to my Fedora desktop, It didn't work. It then lied in by drawer for almost a year. I bought another cheap cam. It didn't work either. Then I realized it is my desktop's problem. If cheese is not installed, then

# yum install cheese
$ cheese

Hooray!  My pictures are then on the screen.  It has no sound however.  I then tried mencoder.  It couldn't find /dev/dsp.  So,

$ sudo yum install v4l2ucp.x86_64
$ sudo modprobe snd_pcm_oss
$ mencoder -o test.avi -ovc x264 -v tv:// -tv device=/dev/video0:driver=v4l2

The video test.avi is on the disk now.  The last command can be of course run remotely.  So, be careful, I might be watching you if you are in my office.

The problem is that there is still no sound.  This is, however, enough to record a flourishing flower or alike things.

Emacs + ibus

我的中文输入并不是每天都用到，因此并不是每次启动机器都启动 ibus。另外 X 的输入也没有单独设置。这样就涉及到 Emacs 中文输入的问题。如下：

$ ibus-daemon -d --xim

可以解决 Emacs 不能用 ibus 输入中文的问题。这样也不需要更改Locale。

另外一个更简单的办法是在终端：

$ ibus-daemon -d
$ emacs blah.blah -nw

这个甚至可以避免窗口 Emacs 中制表键可能失效的麻烦。
在 empathy 中右击输入窗口可以选择ibus输入法。

Generation of Chi squared or student t distributed random numbers with MKL

The MKL includes 11 random number generators (RNG) with continuous distributions.  RNG for Χ² and student t are not included.  They can however be obtained with the 11 available RNG.

Posting source codes

Frequently, I need to post sample source codes, either in C, C++ or other languages, here or some forum elsewhere.

有马先生

十五年前，我还在读研究生，遇到一位来自日本的互访教授。他叫有马义信。有马的日语发音是 Olima。他右手的食指还没了，说是因为他父亲农场的机器太多。说来也奇怪，这么长时间过去，这些细节我还记得。

Fedora's virtual service vs Amazon AWS

From now and then, I need to test some software on my desktop.  To prevent crashing my system, it is better to have some virtual systems.