Random thoughts

While standing in line at the supermarket today, I overheard a lively discussion between the cashier and a customer who complained about not getting the discount price advertised on the rack.

This supermarket chain runs a fairly elaborate customer loyalty program, with some discounts applying only to members of the program. There used to be some problems in the past with keeping the signs and the computer systems in sync but not this time. There was no technical problem here, just an oversight on the customer's part.

The customer eventually agreed that the discount wasn't applicable, since she was not and did not want to join the customer loyalty program, and decided to return the tomatoes, mumbling something along the lines of "Everything is getting so much more complicated, no wonder that this world blows itself up."

Now I wouldn't consider the customer loyalty program a serious threat to the world, and actually enjoy the benefits offered, although it means knowingly giving up some privacy in exchange for discounts. (I will gladly post my grocery shopping list here too if someone is interested :-))

Scanner cash registers and storing membership information electronically on the ATM card are certainly vast improvements in usability and convenience over the old manual cash registers (I do remember checking my weekly grocery bill for errors back when I was a student, a rather slow process given the long list of just prices, but it was worth the effort more than once) and collecting discount coupons.

Those of us working in a technology industry should remember though that not everyone will want to or have the ability to adopt new technologies, and those who opt out must not be left behind.

Otherwise, this world will blow itself up ...

Labels: technology, usability

The well-being team at IBM offers a variety of courses to keep everyone fit and health.

Yesterday morning (at 8 a.m., I am not exactly a morning person so this was the hard part) I had my first Tai Chi lesson. Our teacher, Chung Hsien Jung, has won national and international Tai Chi championships, and more importantly creates a friendly and inviting atmosphere. Watching him perform a sequence of postures and moves is simply impressive and a good motivation to spend an hour or two every week to practice Tai Chi myself (not that I expect to get anywhere close to this level, but that's beside the point).

Tai Chi is based on the theory of the Taoism and the principle of the contrasts of Yin and Yang. The sequences of moves are used for supporting healthiness, relaxation and physical balance. We learn the Chen Style (陳氏), the oldest form of Tai Chi characterized by the combination of slow, supple and fast, powerful movements. To some extent the concepts and the moves reminded me of Jujitsu, which I had practiced many years ago.

The first lesson was fun, so I will be back again next week!

Labels: personal

Tavis Ormandy has posted a potential security exposure with DNS entries for "localhost" in zone files on Bugtraq. While the impact of this exposure seems minimal, I would rather err on the side of caution, and this should be fairly easy to fix.

"localhost" DNS records in a domain should not be confused with the ".localhost" TLD defined in RFC 2606 Reserved Top Level DNS Names, and should be configured on nameservers. I haven't been able to find a requirement in the RFCs to have a "localhost" entry in a domain, nor can I think of a compelling reason for keeping the entry as long as nameservers for a domain are properly configured to handle queries for "localhost.".

RFC 1912 Common DNS Errors explains how to configure the localhost and 0.0.127.in-addr.arpa zones:

The "localhost" address is a "special" address which always refers to
the local host.  It should contain the following line:

           localhost.      IN      A       127.0.0.1

The "127.0" file should contain the line:
           1    PTR     localhost.

and recommends to not define "localhost" with the domain name appended.

Thoughts on removing "localhost" from zones, anyone?

Labels: security, technology

Choosing a hosted service for blogging was a matter of a few minutes, and it didn't involve working through feature lists and comparison charts.

I started playing with Blogger and within minutes had a basic template and publishing to my Web server working. The template language looked sufficiently flexible, and the backing by search giant Google made this an attractive choice too.

WordPress would have been next on my review list. The hosted options are probably comparable, with WordPress offering some advanced features for a fee. Anita Campbell has published a great article about moving a blog from Blogger to WordPress, citing a number of good reasons why the latter is a much better option, although Blogger was “simple to set up and use”. Good enough for me.

One minor limitation I noticed is that Blogger only creates a single XML feed but no category feeds, which can be created easily using the rich Blogger data API.

The only complaint I have about Blogger is the incorrect rendering of ampersand and angle quotes:

• Ampersand: &
• Angle bracket open: <
• Angle bracket close: >

They are represented correctly as entities in the XML feed, but rendered as plain characters in the HTML version. This looks like a bug that should be easy enough to fix.

Labels: google, technology

When we spent our summer vacation in Sicily in 2004, I often wondered why some road signs in Sicily listed detailed information about the relevant laws and even the specific section and paragraph of the act.

Since 2006, the immission control act Immissionsschutzgesetz-Luft (IG-L) has been enacted in Austria, which allows authorities to impose certain restrictions on production facilities, traffic, and outdoor combustion to reduce immissions when pollution thresholds are exceeded.

The act requires that immission control related speed limit must be signposted with reference to the act. On previous trips between Vienna and Salzburg I had complained about the unnecessary distraction by additional signs; after all I don't usually care why a speed limit has been put in place, although there is evidence that drivers are more likely to adhere to environmentally motivated speed limits (source: Luftreinhalteplan Stuttgart), and lower speeds generally mean lower emissions (source: Land Tirol: Tempo 100).

One set of road signs around Linz looks especially bizarre: a combination of lifting the 100 km/h speed limit and introducing a 100 km/h speed limit for immission control, and vice versa in the opposite direction.

Recently some of the roadsigns were replaced with large over-the-road displays which allow for dynamic speed limits depending on weather conditions, traffic flow and pollution levels, which is goodness. I wonder though how many drivers will have a clue what the big white letters IG-L next to the speed limit signs mean ...

Labels: technology, travel

We wish you all a happy, healthy and prosperous new year 2008!



We spent new year's eve with Andrea's parents and friends in Salzburg. The weather was foggy so the fireworks weren't that impressive this year, and we did forgo the midnight waltz on the icy terrace as well.


Today was another lazy day, we listened to the New Year's Concert 2008 under Georges Prêtre while we had breakfast, and Elias became inspired to dance to the music after seeing ballet dancers on TV, which was very, very cute.

We did go for a walk around Aigen in the afternoon and Elias had a chance to see real cows in a stable nearby, he looked quite impressed. This was our last vacation day in Salzburg; tomorrow afternoon we will return to Vienna.

Labels: personal

Labels: personal

So I have finally started my blog. While the blogosphere continues to grow at an amazing speed, some bloggers of the early days have already switched back to a static homepage they update every now and then, or gone completely offline.

Why now? No particular reason really. I have been playing with the idea of creating a blog and have written up a few blog posts locally without publishing them, just to see how I liked it and what I would have to say. (A few of those early secret blog posts still sit on my hard disk and will eventually show up here retroactively.)

Looking back, I first maintained plogs (for “paper logs”) some 20 years ago when Andrea and I were traveling around in Europe by train. Each of us would write down the experiences of the day, where we went, what we liked and disliked, just about anything that came to mind, in a small booklet. When we were both done with writing, we would read each other's notes, which was great fun.

The intended readership of these plogs was one person. The esteemed readership of this blog may be about the same size currently. By coincidence, Bernhard just started blogging too, so that makes us two late adopters and ensures each of us has at least one reader. Onward.

Next, there was a technology decision to be made: install blogging software or use a hosted service. Ed Costello had shared his experience with getting Movable Type working on pair Networks servers, reading through the steps and given that I wasn't planning to spend more than an hour or two in getting things running I chose to go with a hosted service, Blogger, and have been pretty pleased with it.

Labels: personal, technology

Now that Fiddler stopped working for me I used Greasemonkey to modify pages on the fly to test some new functionality.

It took me a while to figure out why a global variable which one of the dynamically added scripts created was not visible to my Greasemonkey script. Of course the answer was right there in the Greasemonkey documentation: "As of Greasemonkey 0.6.4, however, user scripts now have their own JavaScript context and execute completely separately from the content document." Fortunately, the document window is also accessible as unsafeWindow, and sure enough that worked.

PS. Michael Baierl pointed out a sample Greasemonkey script to load jQuery before executing functions that depend on jQuery—nice!

Labels: javascript, webdevelopment

Andrea and I took Sunday off this week. Elias stayed with his grandparents at my sister-in-law's place, the first time ever without one of us around at night, and it worked out nicely.

We missed him on the way home already, but waking up at 10:30 a.m. without the usual "Mama, Papa, Frühstück, aussa, rasch" was very enjoyable for a change. The weather wasn't great so we stayed home and spent the day messing around.

Elias had a good time and didn't seem to miss us too much.

Labels: personal

An interview "The Business of Life" first triggered my interest in The 4-Hour Workweek: Escape 9-5, Live Anywhere, and Join the New Rich by Timothy Ferris.

Of course even the author will readily admit that one should "not to take the four hours too literally" and it certainly makes a catchier title than "Save an hour per week for things you like", but then anything that means getting more done with less effort and having more time left for the things you really enjoy is good, right?

Ferris may get some basic facts wrong, as readers noted on amazon.com, but he certainly gets his marketing right. His book must have been featured in about every TV show and newspaper by now, judging from the number of comments and the news coverage since. Some claim this book changed their lives while others feel tricked by the simple, well-known recipes -- not everyone is going to make a living from selling nutritional supplements.

Despite the criticism I ordered my copy last month (so I guess the concept worked!) and also added Getting Things Done: The Art of Stress-Free Productivity, which received favorable comments that I can relate to.

The books were in the mail today, and I will start reading them over the holidays. They probably won't significantly change my life but they should make light reading over the holidays and nicely complement the fiction books, and they may even give me some useful ideas for New Year's resolutions.

Labels: business, personal

DNS blacklists (DNSBL) provide information about characteristics and past observations of IP addresses and have been used in filtering spam for more than a decade. In short, a spam filter may check one or more DNSBL services to determine if the network address from where an e-mail is delivered is trustworthy or suspicious.

Besides listing addresses of known spam sources or virus-infected machines, there are lists for criteria such as network type (dial-up/cable/DSL) and configuration issues (open relays, RFC non-compliance).

One of my colleagues recently had e-mail to a client rejected by their mail gateway with the error message "554 Your Host 32.nn.nn.nn was found in the DNS BlackList at uk.countries.nerd.dk."

When he asked for help with this, my first thought was that one of our addresses had, rightly or wrongly, been listed as a spam source. However, after looking around countries.nerd.dk it became clear that the recipient was blocking all mail that appeared to come from certain countries according to the countries.nerd.dk database despite the disclaimer on that Website that "countries.nerd.dk is NOT a list of spammers, it is an IP-to-country DNS mapping service."

What's worse in this case is that the mapping was incorrect: The whole 32/8 netblock is declared to be based in the UK: "32.0.0.0/8 :127.0.0.2:Your IP is in uk, rejected based on geographical location". There may be some UK based addresses in that netblock but others are located in North America and possible other places too, and similar geographic mapping services managed to get the location of the particular mail server (almost) right.

Although many open source and commercial mail filters rely on DNSBLs, there has been valid criticism, and even lawsuits against DNSBL operators. The main concern I have is that administrators may rely on a single DNSBL service to mark messages as spam and reject them without understanding the service's reliability and limitations.

Labels: spam, technology

Last Wednesday, my home office phone line all of a sudden stopped working. The telecom provider tried to reset devices along the route to my home to no avail, so they promised that someone would look into the problem and call me back within 48 hours (on my other line, of course).

Time went by, and at Friday night nobody had called, and my phone line still was not working, so I called again. After enjoying some 20 minutes of "All service representatives are currently serving other ..." I spoke to someone who admitted that nothing had been done about my problem, and nothing could be done about my problem as it was now out of hours and technical staff would be back on Monday morning, I would get a call.

You probably guessed the response when I called again Monday morning, the problem ticket was still untouched and we scheduled an appointment for an on-site check this morning. My phone line was still dead and my mood had shifted from annoyed to resigned already. Around 2 a.m. in the morning, just about before going to sleep, for some reason I tried one more time and—my phone line was perfectly fine again! (This is like me feeling much better already when I have an appointment scheduled with a doctor, all the symptoms just go away and I question the need to see the doctor. Electronic devices seem to work the same way.)

The one week phone outage had a positive side effect though: Desperately trying to regain the convenience of a desk phone with a headset and a mute button, I successfully connected my mobile phone to my desk phone via Bluetooth. To my great surprise, this works perfectly fine. I can easily accept mobile calls on my desk phone, and choose between land line and mobile phone for outgoing calls ... nice!

Labels: technology

After several months of battery problems I finally had my Nikon D80 repaired; late autumn seemed like the perfect time, not much outdoor activity and photo shooting opportunities any more, and we had most family visits in October already and I definitely wanted the camera repaired while still covered by warranty. I recently got my camera back with the electrical system repaired, and so far it has been working nicely again.

Today I picked up some photographs which I had taken with my old Minolta Dynax 7xi SLR on November 1, and what can I say, I was very pleased with the results. Not that the D80 is a bad camera, it is an absolutely fantastic piece of technology, fast and easy to use and absolutely suitable for taking great pictures, but there is something about photography the old-fashioned way too besides the differences in resolution, dynamic range, depth of field, etc.

First, with film you don't end up with dozens of very similar pictures because you only take the one or two that look most promising. There are probably as many good pictures in the gigabytes of digital cruft accumulated on my hard drive, only they are harder to find and who really goes through and cleans out all the not-really-that-great-but-still-acceptable pictures taken digitally?

Second, there is the lack of immediate feedback which helps. Yes, that's right. Admittedly, I did miss the nice bright screen showing me what the picture looks like when I shot on film, so I had to make an effort to get everything right instead of going through several iterations, trying to judge picture quality from an LCD screen.

Third, picking up photographs at the store, flipping through prints which bring back recent memories is a ritual I have become so used to after more than two decades of doing it that I do miss it.

(If you want to know more about the technical aspects, Ken Rockwell has written a great article Film vs. Digital explaining pros and cons, with some eye-opening crops of analog and digital photos. Norman Koren has even more technical details in Digital cameras vs. film although the Website has not been updated in years.)

Back in 1998 John Patrick, then IBM's Vice President, Internet technologies, in his keynote speech at the WWW7 conference in Brisbane talked about how Internet technology impacted our lives and would change expectations. If memory serves, one of the examples he mentioned was the 1 hr photo lab and that people would not be willing to wait for a full hour to see pictures, they would want them right away (and students asking for a T1 at work, too).

Less than ten years later, broadband connectivity is widely available and is cheap, or sometimes free, photography is mostly digital and there are few labs offering decent film developing these days.

Neither would I want to go back to 56K dial-up at EUR 30 per month plus charges per minute, nor would I want to pay per picture (prints for a single roll of film cost another EUR 30), nor would I want to miss the convenience of my digital camera, despite my nostalgic, misty-eyed views.

Labels: photography, technology

So we came to Vorarlberg to see my family and go for walks in the mountains, but with the exception of Monday it has been raining heavily every day. Too bad we didn't get a chance to go for walks, there are some nice and easy walking trails from Dornbirn-Bödele which I walked many times as a kid. At least we managed to spend a few hours outdoors on Monday, walking over to the Hochälpele ski lift (a drag lift so it is not in operating currently :-)) and back to the Meierei, an alpine dairy serving huge cheese boards. Elias had a good time with the cows and calves, he even offered them his bottle of apple juice, and saw (and smelled!) turkey and pigs for the first time.

We spent the rest of the week sleeping, reading, eating and meeting with family. On Tuesday afternoon we met with my mother and grandmother at a café in Dornbirn. The next day we went to see the Inatura exhibition, a kids-friendly museum of nature with stuffed animals you may actually touch, living insects, tunnels to crawl through, beautiful koi carps, and last but not least bouncy bounce. Afterwards we said hello to my other grandmother, Elias was tired from the exhibition and slept through for a while before walking around and opening all cabinet doors within reach, mumbling "no, no" all the time to remind himself that he wasn't supposed to do that.

On Thursday we had lunch with my grandmother again and enjoyed a traditional Riebel, then went for a walk in the city despite the heavy rain and finally went swimming in the Hallenbad Dornbirn, which was recently renovated and looks much nicer compared to when I was a kid. Elias was equally impressed and frightened by the fast water slide ("black hole") and the water fountains in the playground. Andrea and I were mostly impressed that a floor as slippery as this one would ever get approved for an indoor pool area, and indeed we struggled to get back to the changing room without slipping.

We had dinner at our hotel Berghof Fetz every night, and on most days Elias decided he wasn't tired enough or too hunger to go to bed, so he joined us several times, much to the amusement of the staff and other guests who smiled at the appearance of Elias in his pajamas and a sweater. And I finally managed to read Donna Leon's book about Venice and a good part of Thomas Glavinic's "Arbeit der Nacht", which is about a man living in Vienna who wakes up one day only to slowly discover that he seems to be the only living being in the world. The story is simply but quite exciting and the style is unique, fresh, simple, quick, not sure how to best describe it, but at almost four-hundred pages the book does have some lengthly parts too. Still, I am curious to find out what's behind all the occurances throughout the story and will continue reading as time permits.

Now time to pack, tomorrow we will head back to Salzburg for the christening of my niece Theresa.

Labels: personal, travel

The amazon.de Web site has had a problem which has bothered me for some time: The search field on the homepage rendered at about half the usual height and text appeared invisible or white on white, so it was impossible to see text:



It wasn't that bad, I am a pretty solid typer and got the search terms right without seeing what I was typing, most of the time; still an inconvenience when trying to modify a search term, especially when the site starting redirecting search responses to addresses that no longer contain the search term, but not bad enough to spend time figuring out what was causing this.

Today one of my colleagues mentioned that he had found a solution to the problem: the PHONETIC.FON file seems to be the culprit, and indeed renaming that file has solved the problem nicely:



(A quick search for PHONETIC.FON sure enough turned up a page Why Do My Fonts in Netscape Navigator Look Funny? in the Netscape Unofficial FAQs.)

Labels: technology, webdevelopment, windows

Samsung deserves credit for smart advertising. Countless times I have spent hours at an airport, desperately crowding around the few power sockets in the wall with a bunch of other folks charging their cell phones, laptops and media players. I even got to the point of bringing warning signs to place around the cable since for some reason the chairs were never closer to the power sockets, and sitting on the floor typing for a while made my wrists hurt.

But now relief is here: I am sitting at JFK airport now, as usual traffic on the SPB was light and I am here way too early, but no more sitting on the floor, looking for power. Throughout the terminal, there are Samsung mobile recharge stations, well-designed poles with power sockets and even a small round table to put the power supplies and other equipment on. No more tripping over wires, no more fierce looks when using power for more than a few minutes ... there is plenty of power now, for everyone. The poles are effective for promoting Samsung products too: The latest Samsung mobile products are featured on the poles, at eye height, not just printed ads but real devices behind a glass cover.

When was the last time you saw advertising that was useful and looked that good?

Labels: advertising, innovation, technology, travel

So after nastiblogging about the iPhone yesterday I managed to get my hands on an iPhone when I was at the Westchester mall yesterday afternoon. What can I say, I still think that the poor battery design, the lack of high-speed Internet connectivity and the limitation to one carrier per country make me think that this isn't a cell phone I would want. But it does feel very, very good. The user interface is amazingly simple and straightforward, no long-winded multilevel menus, no key sequences to remember, the browser works well and rendered www.ibm.com nicely, including the recently added dynamic components. The touchscreen keyboard works pretty well for text thanks to error correction (but otherwise requires some practice and probably even then it won't match the speed of a tactile keyboard).

Labels: technology

Shareware and open source software have been said to lack official support. This may be true for some products but certainly not for my favorite editor, EditPlus, for which personal support by the developer is second to none.

Hats off to Sangil Kim, not only does he write fantastic software and respond to feature requests and (rare) bug reports almost immediately, he is also the most organized person I can think of. When I tried to reinstall EditPlus on my new computer, I managed to locate the original registration email which had the version 1 registration key, but couldn't find the upgrade key; so after searching all places where I typically keep this type of information I sent off an e-mail to the EditPlus support address, and within a few hours received a copy of the original e-mail from 2000(!) that contained my registration key. Thank you!

Labels: kudos, shareware

The New York Times has two entertaining videos by David Pogue about the new iPhone, the pre-release The iPhone Challenge: Keep It Quiet and I want an iPhone.

What is all this hype about? I guess it holds true that good design is still good business, and Apple certainly knows good design, at least when it comes to user interfaces. Not allowing the user to extend the device or even just change the battery may follow the Apple philosophy that users don't need to care what's inside, but requiring customers to send in the phone, wait three business days, pay $85.95 to get the phone "repaired" as Apple calls it and have all your data deleted during that process is not good design.

Dear Apple folks, please try harder!

Labels: technology