Domain: uni-bayreuth.de
Stories and comments across the archive that link to uni-bayreuth.de.
Stories · 3
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Escher and Elliptic Curves
melquiades writes "Mathematician Hendrik Lenstra was struck by the blank spot in M. C. Escher's Print Gallery . Why is the spot blank there, he wondered, and what should go in it? Although Escher, who had only a high-school mathematics background, drew the picture by brilliant and methodical intuition, the mathematical machinery underlying the image turned out to be elliptic curves (which come up in factorization, cryptography, and the proof of Fermat's Last Theorem). Lenstra and his colleagues were able to generate several breathtaking possible completions for the missing space. Read the story at the ever-registration-required NYT." -
Slashback: Justice, Delving, Printing, Noir
Updates on Tom's detective work, Kevin's touchy look-but-don't touch semi-citizen status, and last but not least a word from the elusive printman, here folded, spindled and mutilated for your edification.Danke sehr, Herr Doktor Pabst! The sighs -- nay, screams! -- of disappointment rose like the wail of a cat in heat following the announcement that AMD's new chips would be clock-locked, nullifying the advantages of Abit's ultra-overclockable motherboard. Jonathan Dabian writes: "This is probably a little late for me to get the name postage on the front page, but Tom's Hardware posted a new story that is an update to the Monday Blurb where they revealed that the new AMD processors would be multiplier locked. In this new story, Tom Pabst reveals the information he has since pieced together about the connections on the top of the processor, and ideas on how to alter those laser etched connections. Overclocking on the Duron and Thunderbird isn't dead. All that's needed is an easy way to alter those connections."
How do you like your quasi-futuristic clothing, Mr. Mitnick? One of the many following the bizarre turns of the Kevin Mitnick saga, RadarRider writes: "According to the following article on MSNBC:' Reversing a previous decision, Kevin Mitnick?s probation officer has given the notorious computer intruder permission to lecture on hacking and cracking, work as a security consultant and write a column for a soon-to-be-launched e-commerce site.'"
Disallowing use of computers unless specially granted seems a fairly over-the-top punishment -- everything has embedded processors. I wonder if Kevin has to ask permission to use an infrared-type automatic toilet, or a programmable thermostat. Where's King Solomon when you need him?
Unca Steve, Unca Steve! Tell us a bedtime story, OK? Speaking of *ashback, gwernol writes: "There's a fascinating letter from Woz - one of the co-founders of Apple on his web page at woz.org. Its a candid glimpse into the early days of the computer world, including tales of hacking the world's first video games -Pong and Breakout - at Atari. See inside the mind of one of the truly great ones. Some interesting perspective on Steve Jobs, too."
(Hint: some of the same words you can't say on television are off-limits to mass-market video games, too!)
Now I can print up dozens of tasty eclaires under Linux! If you followed the recent story about modernizing UNIX printing standards, you may have caught the news that CUPS 1.1 has been released. Here's some more information from the horse's mouth. printman writes: "Nine months after the CUPS 1.0 release, we are proud the announce the birth of CUPS 1.1, with documentation nearly 500 pages long and distributions weighing in at around 4MB.
"What is CUPS", you ask? The Common UNIX Printing System ("CUPS") is an IPP-based printing system developed by Easy Software Products as a replacement for the aging and clunky Berkeley (LPD) and System V printing systems. CUPS provides all of the modern printing ammenities, including support for user-defined printers and options, non-PostScript printers, color management, and page accounting.
CUPS 1.1 continues our commitment to an open-sourced, IPP-based printing system for all UNIX's. The new release contains many of the functional enhancements that have been requested by our users, including:
- New USB backend and backend device discovery.
- Banner page support
- Digest authentication
- Directory service enhancements, including polling, relaying, and access control
- Directory structure changes to conform to the FHS 2.0 standard used by most Linux distributions.
- Documentation improvements and additions
- Drivers for EPSON printers
- Filters - new PostScript RIP based on GNU Ghostscript 5.50 core, new PDF filter based on Xpdf, new text filter supporting Unicode and bidirectional text
- IPP/1.1 support
- Job persistence & history
- Licensing change - the CUPS API is now provided under the GNU LGPL
- LPD client support
- User-defined printers and options
- Web administration interface
In addition we have contributed more new code to the SAMBA team to support CUPS printing "natively" via IPP, providing a faster, more reliable Windows printing experience.
Others have also been busy at work adding to CUPS. Besides our ESP Print Pro software, two new graphical interfaces have appeared for CUPS - KUPS is a KDE-based interface for CUPS, and XPP is a FLTK-based interface for CUPS.
On the driver front, Grant Taylor has come up with CUPS-o-matic, a PPD file generator and filter script for existing Ghostscript printer drivers, and the GIMP print plug-in developers are working towards "universal" drivers for GIMP, Ghostscript, and CUPS.
Finally, many Linux distributions are including (or planning to include) CUPS or ESP Print Pro. This should provide the final push to get printer manufacturers to support their printers under Linux and *BSD.
For more information on CUPS, go to: www.cups.org
And for bonus points ... Katsu Jin Ken writes: "Indrema has posted a new picture of their upcoming console on their front page." It's looking a lot svelter and sleeker than the old look, and like the finest computers everywhere, features a blue LED. (On the other hand, beware the rude no-exit site design.) Please, Indrema, make it so!
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Open Source Scientific Apps?
Paranoid Diatribe asks: "I'm a Unix admin for a scientific computing environment at a large public university. In the past few weeks, I've had the (dis)pleasure of dealing with several vendors to get their applications re-licensed to run on various machines. These are vendors of scientific applications like MOLGEN, apps from MSI, and S-PLUS. There are many others. The majority use the most evil of license managers, Flex-LM. I spend more time messing with Flex, license key files, and calling the damned vendors than I do actually administering the boxes they run on. As such, I am becoming very disenchanted with these commercial vendors. Is there a compilation of alternative scientific computing apps (GPL, BSD, or other open license would be preferable) and how they match up to their commercial counterparts? I'm aware of Freshmeat.net and a small list at the OpenGL site (though many of these are commercial as well), but I was wondering if there was a better list of such apps."