Oct. 25th, 2008

alexpgp: (Default)
Back a couple of careers ago, I developed so-called expert systems, which - without referring to any kind of academic definitions - are programs that embody the expertise of one or more "subject-matter experts" in such a way as to make that knowledge available for future utilization by non-experts.

One such system I worked on involved modeling the control system hardware - the collection of limit switches, flow sensors, pressure sensors, etc. - used when loading propellant aboard the Space Shuttle. The model was designed in such a way that, should some part of the real-world system indicate that things are not right (for example, that there was no pressure in a line with flowing propellant, suggesting a ruptured pipe) the model would be used to determine whether the indication was correct. If so, further propellant loading operations would be suspended, pdq. On the other hand, if the indication was the result of a malfunctioning sensor (which is statistically almost a certainty, given the enormous number of sensors in such a complex system), operations should continue, cautiously.

Making a mistake is costly: it costs a pile of money to stop loading propellant; it costs even more to replace a Shuttle.

It was challenging work, and I don't know if anything ever came of the prototype we worked on, as the lure of Silicon Valley brought me to California and a new career, which is grist for another post.

Developing expert systems involves interviewing experts and using various techniques to elicit information from them. You've got to challenge them in ways that might reveal aspects of what they do that they themselves might not be aware of. Experts do not always like "knowledge engineers" (which is the name applied to developers of expert systems), because the latter physically represent what is often perceived as a vainglorious and quixotic effort by upper management to put the expert's knowledge "in a can," perhaps with the intention of then forcibly retiring the expert.

I find I use much the same eliciting techniques whenever I quiz the people with whom I work on the terminology they use, and sometimes, I get much the same in the way of reaction, although here there are two basic drivers.

First, many experts in technical fields have decidedly poor language skills, and asking such a person to stop and focus on the words that he or she uses is a lot like asking an expert to get into the nitty-gritty of how decisions are made on a subconscious level (as in the case of locomotor skills). As soon as you start to think about it, you're not sure.

Second, some experts are reluctant to get into explanations that might be construed to be too complicated for a "mere" translator to understand. (The typical flag for this reaction is the response "Well... <pause>... it's actually the same thing" when asking an expert to draw a distinction between two different terms.)

In my experience, most violators in the first group are English-speakers; most in the second group are Russian-speakers.

I'm sitting here right now, elbow deep in various scratchings, trying to make sense of my terminology related notes. Somewhere here I have a really marvelous description of экспериментальная отработка that I feel will be key to a broader understanding of several other terms as well.

At 9 am, I'm going to accompany some of the folks staying over for the two-day meeting next week (which I will be supporting) on a trip to Microcenter. I've got an idea.

Cheers...
alexpgp: (Default)
It's been a pretty quiet day. I had intended to go get a rental car but decided against it. I have no great desire to drive around northern Virginia and was prepared to remain in my room and contemplate the universe, when I got a call at around 10 am from one of the Ukrainians staying over for the meeting next Monday and Tuesday asking if I would be willing to come along on a trip to a local Microcenter store. Having nothing in particular to do, I agreed.

Many folks visiting from the former Soviet Union have a desire to buy computers while here. The particular model of interest to my colleague was not in stock at the Microcenter, but some other useful items were found and bought. Among other things, I picked up a second battery for my HP tx2000, because having a spare battery is always a good thing. After we returned to the hotel, I took a nap and took care of some housekeeping chores, after which I got another phone call.

Could I help, came the question, with the purchase of a computer at Best Buy just across the way? I said it would be no problem and helped with the purchase an Asus 1000, which is a pretty impressive little machine. Upon returning, I was invited to join a gathering where a good time was had by all, lubricated by some good Ukrainian горiлка (vodka). In the course of events, I spent a significant amount of time attempting to explain the American electoral system one of the Ukrainian specialists, though I'm not sure I was terribly convincing.

Tomorrow there is a trip planned to the Luray Caverns, and I've been invited. As my calendar is not terribly occupied, I figured I'll go along.
I purchased an application called Note2Self for my iPod Touch, but have had the devil's own time trying to get it to work with any microphone I have with me. A $10 microphone I purchased at the Microcenter didn't work. A note to the publisher's tech support email address did reveal that I needed a special microphone -- which I eventually figured out meant a microphone with a special jack -- to make the thing work, but provided no additional information.

It turns out the Apple headphone/microphone combination for the iPhone does the trick, and I managed to get a set at the Best Buy. Overall, however, the level of available up front information has not been breathtaking in this case and I would assess the overall experience to be less than pleasant. I must keep this in mind for the future when dealing with iPod apps.

Time to hit the sack, as we head off for the Caverns at oh-dark-thirty, or thereabouts.

Cheers...

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