Monday, April 30, 2007

Quote of the Day

From today's AWAD:

The older I grow, the more I listen to people who don't talk much.

—Germain G. Glien

Tuesday, April 24, 2007

Mouse Message

Nice! My mouse froze again a few minutes ago on my Edgy Eft - Gnome - Beryl desktop. I thought it was a driver problem or some instability from the above. However, after killing the X session and restarting it, someone (Xorg?) or more likely the mouse driver, told me that my mouse power was getting low and it needed to be “recharged.”

Of course! My Logitech wireless mouse neede new batteries!

A trip to the supply cabinet with help from Jim K solved the problem.

Linux Disk I/O

Here's a very nice description that drills all the way down into the kernel I/O code for a Linux read() call.

Actually the whole document by Andries Brouwer is worth reading.

Monday, April 23, 2007

Where's the Text??

Okay, I want to learn something new. I want to find out about something. More and more lately, I find web sites with links to information about a topic that are videos, flash animations and such. Okay, those are fine but Where is the Text?? Usually I want to READ about a topic. It's faster and I can skip around. I usually don't want to watch a video!!! Lately, I keep coming upon cases where I can't find any text but only video.

The most recent example was this morning at Sun's web site. All videos. Argh!

Maybe the text is there somewhere but it sure is getting harder to find. At least it is in some cases, which are way too many for me.

Real Estate Plot Roller-Coaster

Okay, here's a new idea for plotting data. Taken from the Freakonomics Blog, this is real estate data from 1890 to about the present, plotted as a roller-coaster ride. This is just cool! (It's a 3m41s video).

Friday, April 13, 2007

How Do You Pronounce CentOS?

Since we plan to use CentOS4 on the compute nodes of the new cluster, the various pronunciations I hear in our phone conferences keep bugging me.

I found this discussion which doesn't shed any true light but only confirms that multiple pronunciations are in popular use, and there isn't an official version.

I pronounce it like SIN-toss and continue to prefer that version.

Thursday, April 12, 2007

Supercomputing Comes to the Rust Belt

An interesting article on rust belt companies converting to a new business.
Three years ago, when Michael Garvey began looking for ways to revive his family's 85-year-old manufacturing business in down-on-its-luck Youngstown, Ohio, he settled on a surprising solution: supercomputing. For much of a century, the tiny company—originally Trumbull Bronze Co. but renamed M-Seven Technologies—specialized in casting bronze parts for steel mills. But now, it has started making money by collecting and analyzing vast storehouses of data to help larger manufacturers improve their operations.

Thursday, April 05, 2007

203 Milllion Linux Phones by 2012

This article in Information Week by Eric Zeman reports on a prediction by ABI Research of 203 million Linux phones by 2012!

Monday, April 02, 2007

Linux Mint


Hmmm. Another distro. This is Linux Mint, based on Ubuntu which is based on Debian, .... So why another distribution?

Here's a summary of what I read.
  • Slightly different look and feel. Green/blue instead of orange/brown.
  • Multimedia already installed including support for MP3s, video, flash, DVDs, etc.
  • Ready Wi-Fi support (they say).
Here's the Linux Mint Home page and this is a brief review.

Thursday, March 22, 2007

Linux MCE

Linux MCE (i.e., Media Center Edition, a la Windows) looks very cool. Today, as I post this, their site is down from being, uh, Dugg. However, Digg is pointing to a semi-entertaining and semi-annoying video demo. Actually I continue to be more impressed with MythTV, etc., every time I see it.

Pournelle Comments on Global Warming

Jerry Pournelle comments on global warming in his 5 March View. Excerpting:

There's a lot more gas about Global Warming, but none of it causes me to change my view: yes, the Earth is warming, as apparently is the rest of the Solar System. The warming trend is hardly alarming: we have had warmer periods in historical times including the Medieval Warm Period. Yes, CO2 levels are rising, and since warm water holds less dissolved gas than cold water, any trend that warms the seas will accelerate that. The levels are high, but we don't really know the effect -- CO2 isn't a very efficient greenhouse gas. Water vapor is.

As the seas rise the surface areas become larger; this increases evaporation, which increases water vapor. Water vapor is a rather efficient greenhouse gas. Higher water vapor content usually means more clouds. Clouds are bright and tend to reflect received sunlight, reducing the insolation reaching the Earth. Models reflecting (no pun intended) this are in a very primitive stage and are not incorporated into the computer models that predict doom (doom now being 17 inches of sea level rise rather than Al Gore's 17 feet).

Enough clouds can produce cooling trends.

Ice ages are far more destructive than periods like the Medieval Warm (many say we should be so lucky as to get something like the Medieval Warm). The polar bears seem to have survived the Medieval Warm (proof: there are polar bears).

Wednesday, March 21, 2007

Pogonotrophy

It's no secret that I've engaged enthusiastically in pogonotrophy for 29 years!

Happy Vernal Equinox

Happy Vernal Equinox which was last night at 20:07 EDT = 0:07 UTC!

Tuesday, March 20, 2007

Publish a Google Spreadsheet Chart

Okay, after reading the previous links, here's a very cool tool that lets you publish a chart (that automatically updates) on a web page from a Google spreadsheet! It's very cool. The app downloads the data, allows customizing the columns used, colors, etc., and generates the code that you can paste into a web page!

Here's a sample I just made!

Google Speaks Emacs!

Amanda reports on this fascinating set of modules in the Google Web API that provides access to Google services from Emacs! Cool!

Related:

Google Apps APIs

Monday, March 19, 2007

Jim W. Backus, Inventor of FORTRAN, Dies

At the New York Times, Jim W. Backus, 82, FORTRAN Developer, Dies.

Here are some excerpts.

Fortran, released in 1957, was “the turning point” in computer software, much as the microprocessor was a giant step forward in hardware, according to J.A.N. Lee, a leading computer historian.
In an interview several years ago, Ken Thompson, who developed the Unix operating system at Bell Labs in 1969, observed that “95 percent of the people who programmed in the early years would never have done it without Fortran.”

After the war, Mr. Backus found his footing as a student at Columbia University and pursued an interest in mathematics, receiving his master’s degree in 1950. Shortly before he graduated, Mr. Backus wandered by the I.B.M. headquarters on Madison Avenue in New York, where one of its room-size electronic calculators was on display.

When a tour guide inquired, Mr. Backus mentioned that he was a graduate student in math; he was whisked upstairs and asked a series of questions Mr. Backus described as math “brain teasers.” It was an informal oral exam, with no recorded score.

He was hired on the spot. As what? “As a programmer,” Mr. Backus replied, shrugging. “That was the way it was done in those days.”



In 1953, frustrated by his experience of “hand-to-hand combat with the machine,” Mr. Backus was eager to somehow simplify programming. He wrote a brief note to his superior, asking to be allowed to head a research project with that goal. “I figured there had to be a better way,” he said.

Mr. Backus got approval and began hiring, one by one, until the team reached 10. It was an eclectic bunch that included a crystallographer, a cryptographer, a chess wizard, an employee on loan from United Aircraft, a researcher from the Massachusetts Institute of Technology and a young woman who joined the project straight out of Vassar College.

Mr. Backus, colleagues said, managed the research team with a light hand. The hours were long but informal. Snowball fights relieved lengthy days of work in winter. I.B.M. had a system of rigid yearly performance reviews, which Mr. Backus deemed ill-suited for his programmers, so he ignored it. “We were the hackers of those days,” Richard Goldberg, a member of the Fortran team, recalled in an interview in 2000.

After Fortran, Mr. Backus developed, with Peter Naur, a Danish computer scientist, a notation for describing the structure of programming languages, much like grammar for natural languages. It became known as Backus-Naur form.

Thursday, March 15, 2007

UCAC

So what is the UCAC? I wasn't even familiar with this catalog. It's the USNO CCD Astrograph Catalog. From their web site (and I've added some brief, explanatory comments [in italics]):

This is an astrometric, observational program, which started in February 1998 at CTIO [Cerro Tololo Inter-American Observatory]. All sky observations were completed in May 2004. The final catalog is expected not before mid 2007. The second data release (UCAC2) became public in 2003. Positions accurate to 20 mas [milli-arcseconds] for stars in the 10 to 14 magnitude range are obtained. At the limiting magnitude of R=16 [red magnitude = 16] the catalog positions have a standard error of 70 mas. Proper motions [apparent motion of a star across the sky] are provided using various earlier epoch data. Photometry is poor, with errors on the order 0.1 to 0.3 magnitudes in a single, non-standard color.

Occultation by Pluto!



There will be in occultation of Pluto of UCAC 25823784 on Sunday morning 18 Mar 10:56 UT (6:56 EDT). It will be astronomical twilight for us, so I don't know if it will be possible to see Pluto in the Southeast. In the Southwest US, it should be visible.

IOTA Page
Space.com

Sky and Telescope doesn't even mention it in this weeks pages!! What's that about??

The picture is from IOTA. Go to their site to see the full image.

Tuesday, March 13, 2007

UFO Sightings


Hah! This Ask Yahoo question (Why do most UFO sightings happen in the United States?) popped up on my Gmail Clips this morning which I found completely fascinating! Particularly this paragraph:

The National UFO Reporting Center lists thousands of "close encounters" submitted by users. According to its database, the United States has far and away the most reported UFO sightings. In fact, California alone has reported more than China, England, India, and Brazil combined.

Monday, March 12, 2007

Girl Scout Cookies

The thing I like best about Girl Scout cookies is that each serving is individually wrapped!