# Older blog entries for BenFrantzDale (starting at number 42)

After way too much looking around (I was on vacation), I decided to get a Samsung SPH-A460 with Sprint. Unlimited Sprint-to-Sprint was the clincher in the end, although they make you pay $5/month extra for that if you don't get a two-year contract. I took several pictures through the airplain window of Arazona and New Mexico on the way home. (The pictures aren't online at the moment.) They turned out pretty grey at first, between the window grime and the haze, but using The GIMP to stretch out the value range all the way made for a vivid print. The histogram tool makes it easy to see how much you can adjust to get the full dynamic range. With regard to printing digital pictures, Shutterfly continues to out-do Snapfish. I ordered from Shutterfly on Wednesday night. The pictures shipped around noon on Thursday and got here today. I ordered from Snapfish on Thursday night and the order just shipped tonight. This is just one datapoint, but Shutterfly has been winning every time. 23 May 2003 (updated 23 May 2003 at 07:25 UTC) » I spent the evening looking for cell phones. Again. I was realizing that the crux of the problem is that, unlike most purchase decisions, cell phone packages are high-dimensional. Consider the monthly payments, the number of anytime minutes, the coverage, reception, and service quality. Then there's the phone. Not all phones work on all networks. Not all phones have the same cool features. The same phone on different networks costs different amounts. Yuck. All this prevents me, I think, from being able to apply my fundamental rule of purchacing: “If I were an expert in the field, would I buy this?” (BTW: That rule works wonders to avoid Sharper Image catalogs and other trendy gadgets. I may write some more on this topic later.) I wish there were a good way to display some of this information so I could actually think about it rationally. It does look like Amazon is a good place to get cell phones, though, particularly if you want to go with T-Mobile. I'm finding that it's suprisingly easy to get used to a 28.8 modem again. Scary. I learned today that, as I suspected, the process Ritz uses to develop normal print film is now all digital. That is to say your print is a third-, not a second-generation print. I don't really mind now that I'm just shooting digital, but it seems pretty deceptive to me for them to switch the process on people without telling them. If I bring in film to print I want a copy of it, not a copy of a copy of it. The artifacts are pretty clear if you look closely, particularly the quality of the noise in regions with very-high or very-low spacial frequency. I just graduated college. Wow. I'm now looking for a place in Santa Monica so I can work for 3i, a company doing digital microscopy. There I'll be doing “graphics programing and algorithm development”. It should be fun. Amazon recently had a deal:$175 for a 1GB CompactFlash card. Now I have crazy amounts of storage on my camera. (Did you know that Compact flash is exactly as thin as a floppy disk?)

I got The Cognitive Style of PowerPoint by Edward Tufte. It's a bit of a rant, but it has a very good point. It basically says of PowerPoint: “the emperor is naked; projecting a series of bullets onto a screen is no substitute for a good speach.” Take the 6×6 rule for making slides: “6 lines of text, 6 words per line.” Tufte gives this quote from a 1950s book to show just how trite 6×6 is:

Jane said, “Here is a ball.
See this blue ball, Sally.
Do you want this ball?”

Sally said, “I want my ball.
My ball is yellow.
It is a big, pretty ball.”

Giving a real talk as opposed to a 6×6×n PowerPoint talk is a high order. I'll see what I can do. My research presentation used PowerPoint (Prosper, actually) only to show a title screen and to show pictures. That's a good start, I guess.

I've been looking for a cell phone. Between seeing what's available with that and my digicam, I must say, technology is amazingly cool.

I saw this sign at PHL on the way home. I can't decide if this piece of art was intentional, but it is the most profound piece I've ever seen in an airport.

I finally figured out how to get a LaTeX table of contents to look the way I want, with no dot leaders and with the page numbers just to the right of the section titles.

\renewcommand*\l@part[2]{%
\ifnum \c@tocdepth >-2\relax
\setlength\@tempdima{3em}%
\begingroup
\parindent \z@ \rightskip \@pnumwidth
\parfillskip -\@pnumwidth
{\leavevmode
\large \bfseries #1~~\hb@xt@\@pnumwidth{\hss #2}\hfill}\par
\nobreak
\global\@nobreaktrue
\everypar{\global\@nobreakfalse\everypar{}}%
\endgroup
\fi}
\renewcommand*\l@chapter[2]{%
\ifnum \c@tocdepth >\m@ne
\vskip 1.0em \@plus\p@
\setlength\@tempdima{1.5em}%
\begingroup
\parindent \z@ \rightskip \@pnumwidth
\parfillskip -\@pnumwidth
\leavevmode \bfseries
\hskip -\leftskip
\mbox{#1}\nobreak\nobreak\hb@xt@\@pnumwidth{\hss #2}\par
\penalty\@highpenalty
\endgroup
\fi}
\renewcommand*\l@section{\@tocline{1}{1.5em}{2.3em}}
\renewcommand*\l@subsection{\@tocline{2}{3.8em}{3.2em}}
\renewcommand*\l@subsubsection{\@tocline{3}{7.0em}{4.1em}}
\renewcommand*\l@paragraph{\@tocline{4}{10em}{5em}}
\renewcommand*\l@subparagraph{\@tocline{5}{12em}{6em}}

\setcounter{tocdepth}{1} % Only show sections and higher
\def\@tocline#1#2#3#4#5{%
\ifnum #1>\c@tocdepth \else
\vskip \z@ \@plus.2\p@
{\leftskip #2\relax \rightskip \@tocrmarg \parfillskip -\rightskip
\parindent #2\relax\@afterindenttrue
\interlinepenalty\@M
\leavevmode
\@tempdima #3\relax
\advance\leftskip \@tempdima \null\nobreak\hskip -\leftskip
\mbox{#4}~~#5\hfill     \hfill\par}%
\fi}
\makeatother



I've accepted “blog” into my vocabulary. I used to think it was dumb, but it's a lost cause. It clearly means what it means.

I helped a Linux newbie yesterday. That's always fun.

I wish OpenGL supported anisotropic mipmapping.

It appears that while MySQL can change column types easily (date to timestamp, for example), in PostgreSQL it's not a one-liner.

I went to a talk today Jonathan Kozol. If you havn't read any of his books I highly recomend them. he is a major player in the cause for improving public education for children of low-income families.

I finally installed spamassassin. My email address survived pretty well for two years, but I've started to get 5 or more emails per day now.

In the spamassassin docs it mentions that you can use your old email addresses as a source for spam. This makes me wonder if distributed spam-finding systems involve disseminating email addresses for spammers to find. Has this been done?

15 Apr 2003 (updated 15 Apr 2003 at 07:29 UTC) »

I learned about tsort today. It's a UNIX utility that takes as input partial orderings and returns sorted output. This can be used to determine if a directed graph has cycles since it prints to STDERR if it finds one.

It would be nice if /dev/null/* could be written to. For example echo "foo" > /dev/null/foo gives an error, but really, why should it? (In that same discussion the facetious idea for subdirectories of /dev/random came up. For example /dev/random/even, /dev/random/prime, and /dev/random/gaussian.)

I recently found a new use for my digital camera. I was hiking in a park in Portland and needed a map. There were no paper maps available, just one big plywood one. One snap later and I had a great 4MP map of the park ready for me to zoom in and scroll around on.

It would be really cool if digital cameras could digitally sign the pictures they take. I'm not sure how feasable this is to do securely since the private key for the camera would have to live in some form on the camera. Even if hardware modifications would be needed to extract the key, that would probably be enough for most use if the camera were tamper-evident.

This might improve the admissability of digital photos in the courtroom. It might also make it easy for editors to avoid the recent LA Times photo that was doctored. For photojournalists one would probably want a wrapper format that included the full, signed image, along with cropping and color correction information.

I'm quite impressed with MichaelCrawford's Living with Schizoaffective Disorder article. I have had some experience around someone who was mentally ill; seeing someone smart and rational discuss these issues publicly is a great step towards destigmatizing this class of illness.

Today I altered Gallery so that it displays camera metadata as well as have Shutterfly print that metada on the back of prints. I posted the modification on the Gallery discussion board.

To me metadata is one of the coolest things about digital cameras. I would love to see GPS data included as well. I'm sure it won't be too long. Either way, having my Gallery pictures say things like “2/25/2003 17:33:54 146mm 1/30 f/3.0” under them is very cool.

I had some harsh words for Snapfish in a recent diary entry. I since heard back from them that the color distortion I experienced was a fluke. I may try them again, but so far I've had great luck with Snapfish. Their customer service has returned my emails quickly and competently and the image quality is great.

I implemented Monte Carlo Localization for my Robotics class. It's a great example of a simple idea that works really well. In the process of that I discovered that math.h includes the gaussian error function. Also, I learned that Maple can generate C code. Look at Maple's codegen page for details.

Last week I attended a LinuxMovies meeting, which was interesting. It was interesting to hear about CinePaint and it's forking from the GIMP. While it's too bad that the projects are diverging, it really sounds like the tools want to be too different. Perhaps low-level things technically could be shared, but doing so probably isn't in the best interest of the projects as a whole.

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