Sven C. Koehler, our hard-coding dataminer has sent me an email while his code was probably exploring the DNA of some beauty. I wonder whether it was the beauty the root-team uses in their logo? Hey, just because of the logo, one ought to give root a try.

 What I was impressed about:
 http://root.cern.ch/root/Mission.html
 ``We started the ROOT project in the context of the NA49 experiment at
 CERN. NA49 generates an impressive amount of data, about 10 Terabytes
 of raw data per run.'';

 ``Thanks to the builtin CINT C++ interpreter the command language,
  the scripting, or macro, language and the programming language are
  all C++. The interpreter allows for fast prototyping of the macros
  since it removes the time consuming compile/link cycle. It also
  provides a good environment to learn C++. If more performance is
  needed the interactively developed macros can be compiled using a
  C++ compiler.'';

 http://root.cern.ch/root/Architecture.html
 ``The backbone of the ROOT architecture is a layered class
 hierarchy with, currently, around 310 classes grouped in about 24
 frameworks divided in 14 categories. This hierarchy is organized in
 a mostly single-rooted class library, that is, most of the classes
 inherit from a common base class TObject. While this organization
 is not very popular in C++, it has proven to be well suited for our
 needs (and indeed for almost all successful class libraries: Java,
 Smalltalk, MFC, etc)''.

But, people working on DAV have had goals which extend beyond simple web page authoring. Some view DAV as a network filesystem suitable for the Internet, one that works on entire files at a time, with good performance in high-latency environments. Others view DAV as a protocol for manipulating the contents of a document management system via the Web. An important goal of DAV is to support virtual enterprises, being the primary protocol supporting a wide range of collaborative applications. Importantly, a major goal is the support of remote software development teams. A final goal of DAV is to leverage the success of HTTP in being a standard access layer for a wide range of storage repositories — HTTP gave them read access, while DAV gives them write access.

Well, the website clains WebDAV in 2 minutes .. I think 10-20 minutes is more realistic :-). A good starter.

Apache2 already comes with mod_dav.

Sven C. Koehler has started to read "Numerical Methods for Scientists and Engineers". He was so kind to send me a few quotes he likes from the introduction.

 Most books on computing stress the estimation of roundoff,
 especially the bounding of roundoff, but we shall concentrate
 on the avoidance of roundoff.  It seems better to avoid roundoff
 than to estimate what did not have to occur if common sense and
 few simple rules had been followed before the problem was put on
 the machine.

 Another standard algorithmic problem both in mathematics and in the use
 of computation to solve problems is the solution of simultaneous linear
 equations.  Unfortunately much of what is commonly taught is usually not
 relevant to the problem as it occurs in practice; nor is any completely
 statisfactory method of solution known at present.  Because the solution
 of simultaneous linear equations is so often a standard library package
 supplied by the computing center and because the corresponding
 description is so often misleading, it is necessary to discuss the
 limitations (and often the plain foolishness) of the method used by the
 package.  Thus it is necessary to examine carefully the obvious flaws and
 limitations, rather than pretending they do not exist.

update: (sorry, German only;) A big thanks to Sven C. Koehler for this summary

 Ich habe es nun in den groessten Teilen ueberflogen.  Die Ideen sind nicht
 wirklich neu: Umformen von Gleichungen, Vermeiden ungefaehr gleichgrosse
 Zahlen von einander abzuziehen, Approximation.  Beim Loesen von
 Gleichungssystemen schlägt er z.B. vor, ein Verfahren einzusetzen, das
 kein wiederholtes Dividieren benoetigt, dann wird's auch nicht ungenau.
 Trotzdem mag ich das Buch, weil es in mir den Eindruck weckt, dass es
 sehr fundiert ist.  Es ist voll von mathematischen Formeln, die ich alle
 nicht wirklich verstanden habe, aber ich werde in jedem Fall wieder darin
 nach Erklaerungen suchen, wenn ich mal wieder ein Numerik-Problem habe.

 Ich glaube für dich ist as Buch eher langweilig, das meiste kennst du
 bestimmt aus dem Studium. :-)

The bootdisk supports standard (dual)IDE controllers, and most SCSI-controllers with the drivers supplied in a seperate archive below. It does not need any other special hardware, it will run on 486 or higher, with at least 32MB (I think) ram or more. Unsupported hardware: MCA, EISA, i2o may not work. Some newer IDE/SCSI-raid systems may not work either.

Tested on: NT 3.51, NT 4, Windows 2000 (except datacenter?), Windows XP (all versions), Window Server 2003 (at least Enterprise).

DANGER WILL ROBINSON! If used on users that have EFS encrypted files, and the system is XP or later service packs on win2k, all encrypted files for that user will be UNREADABLE! and cannot be recovered unless you remember the old password again

link

 A quote from "Pirates of the Caribbean: The Curse of the Black Pearl":
 --You're pirates. Hang the code, and hang the rules. They're more like
 guidelines anyway.

DataVision is an Open Source reporting tool similar to Crystal Reports. Reports can be designed using a drag-and-drop GUI. They may be run, viewed, and printed from the application or exported as HTML, XML, PDF, LaTeX2e, DocBook, or tab- or comma-delimited text files. The output files produced by LaTeX2e and DocBook can in turn be used to produce PDF, text, HTML, PostScript, and more.

DataVision is written in Java and uses JRuby to add Ruby scripting.

I always enjoy reading his weblog.

"The Lovers" by Gilles Tran (2001). Find more in the Hall of Fame

I still remember my first ray traced spheres on old XTs 15 years ago :-).

There is a competition and the monthly irtc. See the May-June viewing page and relax.

Computers are a grate time-killer, especially once you get into 3D images and animations. Enjoy it!

example graphs

 Will this company be successful and become another Google?
 First, graphical data mining has never been a big hit. And second,
 there are lots of competitors in the business intelligence sector,
 including at least Business Objects, Cognos, Hyperion and MicroStrategy.
 So make your bets and wait for the next multibillion-dollar IPO.

 I'm developing an executive dashboard, and I haven't been satisfied
 with the business graphics that are widely available
 (e.g. gauges, dials, stoplights). I decided to make a "Zen" version
 of a KPI status indicator, using as little color as possible,
 and incorporating E.T's innovative "Spark Line" metaphor for display
 of trends. The graphic below shows the proposed KPI display across
 the top of a browser screen with a descriptive example in the middle.
 Any feedback would be wonderful!

 Comments: Because of complex KPI names (e.g. This Week versus Last Week
 Sales (All Divisions), KPIs were labeled with Roman numerals.
 Balloon help could display the KPI name when the cursor brushes the
 KPI indicator.

link

 Below is a quote from Dave Pollard, the former Chief Knowledge Officer from
 Ernst & Young. It is a great paragraph because is is truly representive of
 why enterprise knowledge managment solutions failed. He is talking about the
 fact that knowledge managment systems have to be personal content management systems first.

 Quote:

 I believe personal content management tools are the place to start, because
 since the earliest days of business, the principal way of sharing information
 has been peer-to-peer, the most valued 'repositories' of business information
 have been personal filing cabinets, and the principal schema for organizing
 work has been the personal desktop. It makes sense, therefore, that tools
 that facilitate and reflect these well-established 'knowledge processes',
 information sources and networks should be much more successful than the complex,
 centralized, hierarchical knowledge management tools and repositories that have
 been foisted on users for the past decade.

 End Quote:

 It is a great quote because how is it possible that anyone could believe that
 a centralied hierarchical tool could work when it was in no way related to how
 people did and have done knowledge work since the beginning.

 Inside my head, I sometimes refer to Del.icio.us as the Google In Reverse.
 Google has amassed a solid mound of ranked and twined web sites. The
 standings shift about with caution, the behemoths are tough to dethrone.
 And if I ask for Ruby, the answers in place may hold through the end of
 the year.
 ...
 Del.icio.us is perfect! The activity bred by competitive linking would
 be enhanced by the sharing of richer media.
 ...
 Better client software is needed to make this happen.

Samizdat homepage

Slides Dmitry Borodaenko presented about Samizdat ath the Euruko 2003

I just now came across the rubyx website and noticed the logo. Nice!

Rubyx is a Linux-distribution similar to Gentoo, but all based on one ruby script :-).

Mozex is an extension which allows the user to use external programs for these actions:

• view page source
• edit content of textareas (possibly utilizing a spell-checker in the text editor)
• handle mailto, news, telnet and FTP links
• download files

link