I'm not familiar with Jabber server for so long. Anyway, I used its client all day all night to access . Jabber is one of the most powerful open-source instant messaging software based on XMPP. Actually, installing Jabber should be quite easy as long as you don't need SSL support. I used to setup Jabber long time ago. At that time, it was very easy so I expected to just do it again by recent version as a backend for Access Grid Text Chat.

In some situations, you might want unicast support in Access Grid because multicast is not available or impossible to implement, e.g., VPN. Fortunately, Access Grid comes with built-in unicast-to-multicast bridge support especially Access Grid 3. However, it is a kind of undocumented feature. I found a few tutorial how to run it. Actually, there are many possibility to run a bridge in Access Grid 3.

I had a chance to deploy Access Grid 3.0.2 for an intranet where as a private venue server is required. However, installation didn't go smooth as I expected because I got Error entering venue whenever I tried to connect to the server. It used to work perfectly when it is Access Grid 2.4. Anyway, I'm not only one got this error, at least I found this thread. The situation looked like Everybody role were not allowed to call GetState() of the venue.

I'm working on geographically distributed computing aka grid computing. Since there are so many resources on this planet, it would be beautiful to see them on the earth graphically. offers this kind of applications could be implemented in a few hours using or . All you need to know are pairs of latitude and longitude to identify where they are. Well, I also want to show the map in full-screen for easily navigating around the globe. In other words, it should resize itself according to browser size. Google doesn't tell me how to do it. Fortunately, I found it!

In fact, I don't have Nintendo DS aka NDS but my friend has one. It looks very impressive when playing game. Not only playing game, NDS is capable to play movie too. The secret weapon is Moonshell DS and its DPG tools. If I'm not wrong, you need 2 files: Moonshell DS 1.1 and Moonshell 1.1 DPG Tools. So, as I expect, I have to convert movie files into .DPG to play in NDS. I have heard about dpgenc which seemed to bundle with the DPG tools but I do want to know how it works. Actually, I would like to use my linux box at night. And I found BatchDPG which is an open source DPG conversion tool relying on Avisynth and mencoder. Eventually, I know what is DPG actually.

As of today, there are so many benchmark to measure performance of any computers into a number for later comparison against other models. I will not talk about that it totally depends on what you want to do exactly. Generally, the performance of a computer directly depends on speeding of floating point operation so it is possible to calculate the upper bound of its performance, Theoretical Peak Performance, by an easy equation.

Rpeak = [CPUs] x [CPU Clock rate (GHz)] x [CPU floating point issue rate]

where

CPUs = [the number of processor] x [the number of cores per processors]