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Visting a Late Lake

February 9, 2009 in Geology, Photography, Places, Science | 7 comments

Not long ago as geology goes — nine, ten, twelve millennia — one of the world’s largest lakes covered most of Minnesota, plus much of North Dakota, Manitoba, Saskatchewan, Ontario and a corner of South Dakota. It’s called Lake Agassiz, named after the scientist Louis Agassiz, who figured out the Ice Age (continental glaciation, basically), and whose statue dropped head-first into the concrete in the 1906 earthquake.

Evidence of the late lake s not obvious unless you look in winter, from altitude. I did that while flying west the week before last. Here’s the photo set I shot. Those lines you see in the farmland are old shorelines of the lake. Since it was a glacial lake — a large puddle left by the effect of global warming on the ice cap — these lines I suppose also qualify as glacial moraine. Anyway, interesting shit. To me, at least.

By the way, the straight lines in the shot above are wind breaks made of trees or hedges. (Not sure.). The larger square or rectangular dark areas are woodlots. The setting is a spot almost exactly where South Dakota, North Dakota and Minnesota meet. I believe it is in South Dakota.

By the way, what remains of Lake Agassiz is Lake Winnepeg, Minnesota’s ten thousand lakes (See this comment below for the correction, and a larger number scattered around three provinces of Canada.

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Getting rained out in a brainstorm

February 4, 2009 in Berkman, Business, infrastructure, Science, VRM | 6 comments

In a meeting yesterday, somebody on the IRC shared links to “Re-identification of home addresses from spatial locations anonymized by Gaussian skew” and “Bregman divergences in the (m x k)-partitioning problem“, from Science Digest. Sez the abstract of the latter,

A method of fixed cardinality partition is examined. This methodology can be applied on many problems, such as the confidentiality protection, in which the protection of confidential information has to be ensured, while preserving the information content of the data. The basic feature of the technique is to aggregate the data into m groups of small fixed size k, by minimizing Bregman divergences. It is shown that, in the case of non-uniform probability measures the groups of the optimal solution are not necessarily separated by hyperplanes, while with uniform they are. After the creation of an initial partition on a real data-set, an algorithm, based on two different Bregman divergences, is proposed and applied. This methodology provides us with a very fast and efficient tool to construct a near-optimum partition for the (m×k)-partitioning problem.

Keywords: Confidentiality; Data masking; Fixed cardinality partitioning; Fixed size micro-aggregation; Bregman divergences; Pythagorean property; Convex partition

What’s extra wacky is that I actually spent time diving into this stuff, even though it’s about forty thousand leagues over my head. Still, it was fun trying to remember all that math I barely learned too long ago.

As I recall, the highest grade I ever got in high school math was a C. That was in Geometry. (Hey, I’m a visual guy.) The only math course I took in college was Statistics. The teacher and I couldn’t stand each other, and I dropped out, or thought I did. Turns out I was too late doing that and the guy gave me an F.

But I kept the book, which served me well years later when I was studying Arbitron’s ratings for radio stations. To my surprise, I actually liked the subject, and used what I learned from the book to develop algorithms for factoring out seasonal variations in station AQH (average quarter hour) shares, to aid in predicting which stations would do what in the next “book”. In addition to racking up billable hours for my company, and helping our client station sell advertising, I was able to win bets with friends in the radio business.

The biggest bet of all was that WFXC, the station with the weakest signal in the Raleigh-Durham metro, would kick ass in the first book after its programming went “urban” (that’s radio talk for “black”). The math was easy. The market was about 40% black, and no other FM stations addressed that population.

I won. Foxy was #1 in its first book. (And it’s still doing well, 2+ decades later.)

As it happens, WFXC “Foxy 107” (a name I suggested to the owners before they picked the call letters, though I don’t know if I was the first to come up with that) was consulted at the time by Dean Landsman, whom I didn’t know at the time. We became good friends years later when we both haunted the late Compuserve’s late Broadcast Professionals Forum, which was run by Mary Lu Wehmeier, now a friend as well. She was the “Sysop” for that forum, where I occasionally came off the bench to help. Running the Sysop Forum was Jonathan Zittrain, who later helped found the Berkman Center, and now stars as a professor at Harvard Law School. Making things even more circular, Dean is now a valuable and diligent contributor to ProjectVRM. Dean, a closet math whiz, made a living for many years doing in-depth work around radio station ratings. I’ll be he knows, or could puzzle out, the quoted text at the top of this post.

By the way, my nickname is the fossil remnant of a radio persona called “Doctor Dave”, featured on WDBS, the prior incarnation of WFXC, which is still around (now with a somewhat better transmitter, and a second and much larger signal on another channel, covering the east side of the market). When I was there, in the mid-’70s, WDBS was owned by Duke University and had awful ratings to go with its awful signal. But it was a great little station. Still friends with folks from those days too.

Ah, I found the picture I was looking for, now at the top of this post. That was the WDBS staff in 1975, I’m guessing. I’m the guy with the wide tie and the narrow shoulders in the back row. There are many missing folks too. I’d love to follow this digressive path, but have too much work to do. At least I’ve left plenty of link and tag bait. 🙂

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Lay-on

February 3, 2009 in Science | Permalink

That would be the opposite of a lay-off, no? Anyway, my friend Brian Benz is one of the too many people recently laid off from IBM. He tells the story here. What matters:

  I have until February 23 to find another position at IBM, so if any one knows of an opportunity inside IBM that I would be a good fit for, please let me know. Otherwise, I’m open to opportunities outside of IBM as well.

Testimony: Brian is one of those people who not only knows a load of tech, and has piles of constructive experience, but who gets what’s going on. Meaning he sees the big picture, in four dimensions — including beyond the horizon. Somebody should hire him soon.

Drill, Maybe, Drill

February 1, 2009 in Business, Future, Geology, News, Past, Places, Science, Travel | 5 comments

This LA Times editorial says,

…when many of Santa Barbara’s most determined anti-drilling activists teamed up to back a deal that would allow an oil company to drill under state waters off the city’s coast, it was a jaw-dropping moment.
Just as surprising, given the deal’s powerful backing, was its collapse Thursday, when the State Lands Commission rejected it on a 2-1 vote. The failure shows that, despite high oil prices that turned “Drill, baby, drill” into a Republican mantra last year, it remains phenomenally difficult to expand drilling in California...
Under the publicly disclosed terms of the deal, Plains Exploration & Production Co., which owns a platform in federal waters just beyond the three-mile limit controlled by the state, would have drilled several wells from the platform into oil reserves on state property. In return, it would have closed that platform, three others it operates off Santa Barbara and two onshore processing facilities by 2022 and donated 4,000 acres of land for preservation. Over the life of the project, the state would have collected up to $5 billion in tax revenues.
Bizarrely, the company and the environmental groups that were parties to the bargain kept the rest of its terms confidential. It is not unheard of for environmentalists to sell out the public interest for political or financial reasons, and no elected official should ever approve a secret deal that affects public resources. The company finally announced that it would disclose the full agreement during Thursday’s Lands Commission hearing, but that was months too late.

To this Santa Barbarian, who loves views of the sea, the oil platforms have their charms. They protrude from the planar Pacific like little square islands with christmas lights. And, as infrastructural studies, they’re rather interesting. It turns out that they’re also welcome offshore habitats, as are scuttled or wrecked metal boats.

Which are worse — oil platforms, or the hills of Los Angeles prickling with pump jacks? Pick your poison. Both bargains are Faustian.

The environmental damage risked, much less caused, by offshore drilling, is not a large part of the whole. Lost in most arguments about drilling in Southern California is the fact that up to hundreds of barrels of crude seep into the ocean constantly there, most of it right by UCSB. It stains the water with long streaks of gray-blue oil, much of it spreading from methane — natural gas — bubblings, some of which are trapped and captured by underwater contraptions. Also lost is the fact that offshore drilling on the West Coast contributes a trivial sum to U.S. energy independence.

Civilization is an open laboratory of trade-offs, with a time horizon that is never geological — and human only to the degree that it considers the wants of the living.

I think the best energy bargains are ones involving sun and wind. But there’s not enough of either to satisfy the energy appetites of a human population that has swelled to many billions. So we must continue to eat the Earth until its dead stuffings fail to sustain us.

After that? Who cares? We’ll all be dead by then too. Maybe some successor species will mine our cemeteries.

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Coal ranching

January 31, 2009 in Geology, Science, Travel | 11 comments

On Tuesday I got my first good look into the coal mines of Wyoming’s Powder River Basin. This is literally where the deer and the antelope played, until the human appetite for power began eating it up. Featured are the Jacobs Ranch and Black Thunder Mines. The latter is featured in John McPhee’s Uncommon Carriers. Great reading. Go get it. (The chapters appeared first in The New Yorker.) Black Thunder (that’s it, above) is the world’s largest coal mine. It’s owned by Arch Coal. About its Powder River mines, Arch says,

Arch had sales volume of 99 million tons of coal in 2007 in the southern Powder River Basin in Wyoming, the nation’s largest coal-supply region. This tonnage is produced at Thunder Basin’s Black Thunder and Coal Creek mines. Arch controls approximately 1.75 billion tons of reserves in the PRB.

I also shot Coal Creek, which is on the other side of another huge mine, Jacobs Ranch. Got many shots of that one too. In fact, I have all these shots in RAW, in case anybody wants a high-quality copy.

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In the likely event of a water landing

January 18, 2009 in Art, Blogroll, News, Past, Science, Travel | 9 comments

Good, tight story of what happened on . In the International Herald Tribune.

By the way, somewhere in this weekend’s Prairie Home Companion, Garrison Keillor sings a delightful tribute to the crew of flight 1549. Heard it live yesterday. The show is running again today on many public stations. Public Radio Fan has times and stations. If you have an iPhone, catch it on your free Public Radio Tuner.

Speaking of which, our first planned VRM feature for the tuner is a “listen log”, to answer “What was that?” questions and to provide fun data that’s yours (not anybody else’s) to do with what you wish.

If you have other features you’d like, on this tuner or on future ones (not just on the iPhone — that’s just where you’ll see it first), let us know.

Too late. Just go ahead with it.

January 13, 2009 in Business, Events, Future, Gear, infrastructure, News, Places, problems, Science | 15 comments

Barack Obama wants to wait on the DTV shift currently scheduled for 17 February. On the grounds that it’ll be a mess, this is a good idea. But nothing can make it a better idea. It’s not that the train has left the station. It’s that the new OTA (over the air) Oz is mostly built-out and it’s going to fail. Not totally, but in enough ways to bring huge piles of opprobrium down on the FCC, which has been rationalizing this thing for years.

I explain why in What happens when TV’s mainframe era ends next February?. Most VHF stations moving to UHF will have sharply reduced coverage. The converter shortage is just a red herring. The real problem is signals that won’t be there.

Most cable customers won’t be affected. But even cable offerings are based on over-the-air coverage assumptions. Those may stay the same, but the facts of coverage will not. In most cases coverage will shrink.

FCC maps (more here and here) paint an optimistic picture. But they are based on assumptions that are also overly optimistic, to say the least. Wilimington, NC was chosen as a demonstration market. Bad idea. One of the biggest stations there, WECT, suffers huge losses of coverage.

Anyway, it’s gonna be FUBAR in any case.

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Tune in, Turn on, Say nice things

January 8, 2009 in Art, Berkman, Fun, Future, Gear, Ideas, infrastructure, Science | 8 comments

So now my dream app is ready on the iPhone. It’s just the beginning of What It Will Be, but it’s highly useful. If you have an iPhone, go there and check it out. It’s free.

As you see here, I’m involved, through the Berkman Center, which is collaborating with , which is working under a grant from the Corporation for Public Broadcasting (). Major props go to the PRX developers, who have been working very very hard on this thing. Some of the most diligent heads-down programming I’ve seen.

An interesting thing. In the old days, when an app came out, in any form, on nearly any platform, there was this assumption that it was a Done Thing, and should be critiqued on those grounds. Not the case here. This is a work in progress, and the process is open. In the long run, we should see much more opened up as well.

Paranthetically, I think right now we’re looking at some cognitive dissonance between the Static Web and the Live Web, when the latter seems to look like the former. You have a website, or an app. These seem to be static things, even when they’re live. An app like the Public Radio Tuner is more of a live than a static thing. But it’s easy, as a user, to relate to it as a static thing. Because at any one time it does have more static qualities than live ones. Imagine a house you can remodel easily and often, and at low cost and inconvenience. That’s kind of what we have here. A cross between product and process — that looks the former even when it’s doing the latter. Anyway…

Though this grant is for an iTunes app, work is sure to go on to other platforms as well — such as Android. So, rather than criticize this app for coming out first on the iPhone, please provide feedback and guidance for next steps beyond this first effort (and join me in giving the developers a high five for delivering a functional app in a remarkably short time). And in the reviews section at iTunes, provide honest and constructive reviews. At this stage I’m sure they’ll be good. (Some of the bad reviews were on the very first version released, which has since been replaced.)

To VRM followers and community members, VRM is very much on the agenda, and we’re thinking and working hard on what the VRM pieces of this will be, and how they’ll work. This may be the first piece of work where VRM components appear, and we want to do them right. Also bear in mind that this is the first step on a long, interesting and fruitful path. Or many paths. Interest and guidance is welcome there too.

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Seeing how ugly it can get

January 7, 2009 in Art, Business, Fun, Gear, infrastructure, Journalism, Photography, Places, Science | 8 comments

Since I’m an aviation freak, I’m also a weather freak. I remember committing to getting my first color TV, back in the mid-70s, because I wanted to see color radar, which at that time was carried by only one TV station we could get from Chapel Hill: WFMY/Channel 2 in Greensboro. These days TV stations get their radar from elsewhere, and have mothballed their old radar facilities. (Here’s one mothballed TV radar tower, at the WLNE/Channel 6 transmitter, which is istself doomed to get mothballed after the nationwide February 17 switchover to digital TV — marking the end of TV’s Mainframe Era.)

Online I’ve been a devoted watcher of both Weather.com and Weather Underground. Both those last two links go to local (Cambridge, MA) maps. They’re good, but they don’t quite match Intellicast, source of the map above. Play around witht the pan & zoom, the animation and the rest of it. It’s a nice distraction from weather as ugly as we’re getting right now here: sleet and then rain atop enough snow to cancel school today,.

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Flying higher

January 5, 2009 in Fun, Life, News, Science, Travel, Uncategorized | 1 comment

I may be wrong, but I’ll betting that Esther Dyson is already the most frequent flyer on Earth.

Now she’s looking to fly at higher altitudes.

Here’s the latest on her Edventure site:

UPDATE: I’m currently living in Star City outside Moscow, training to be a cosmonaut as backup to Charles Simonyi. His flight launches March 25. For details of my EDventures, see the LINKS for Hpost and FS blog. (I’m cross-posting.)

And here is her latest at the Flight School blog. Plus an earlier post about committed to blogging as well. Among other things. Read around. Many links to follow.

Hat tip to Chris Locke.

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