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Ask Slashdot: What To Do With Misdirected Email?

Garin bah, you guys are no fun (388 comments)

Y'all are missing out on a good time.

I have a gmail account with the first name dot last name set up. As you can imagine I get quite a few messages for people who forget to tell their friends about their middle initial. However from context, I can often tell which of my name-sharing buddies the email was intended for. Over the years I have actually gotten to know a couple of them, which is fun.

I don't bother trying to tell the senders about the mistakes, they usually do nothing, oddly. The recipient, however, tends to get on it effectively.

It's quite interesting do talk to them. What's in a name?

about 10 months ago
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Global Anoxia Ruled Out As Main Culprit In the P-T Extinction

Garin Re:A Breathtaking Report!! (158 comments)

Actually, I'll take that back about the emphasis bit. Boswell pretty well nails it right on the head. Now I'm looking through some of his other articles, and they're excellent.

about a year ago
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Global Anoxia Ruled Out As Main Culprit In the P-T Extinction

Garin Re:A Breathtaking Report!! (158 comments)

Well, ok. Though there's not much more that I could have written in that short of a space that can teach the subject.

I linked the Calgary Herald / Postmedia News article because it's an astonishingly well-written bit of science journalism that lays it all out superbly – kudos to Randy Boswell. He didn't put *exactly* the same emphasis on exactly the same things that Proemse (the principal author) would have, but it's minor. That's the "public" piece, and it's full of tons of great information.

I also linked the official research article. Unfortunately it's behind a paywall. However, if that's the kind of thing that really turns your crank you probably already have access to it one way or another (in the worst case: via a physical trip to your local university). If you can't, well, correspondence with an author is a time-honored method for obtaining your own copy.

about a year ago
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World's Most Powerful Private Supercomputer Will Hunt Oil and Gas

Garin Re:So how does it work? (135 comments)

Nah, he's not wrong. But neither are you.

Seismic processing is about as embarrassingly parallel as it comes. Just about every processing step can be split up into e.g. single shot record steps, taking advantage of assumed linearity in wave equations. Furthermore, most production industrial imaging codes weren't actually using my original example of a full finite difference solution until quite recently, and instead they were using algorithms that have been developed for decades under the limitations of very old computers. Sure, some of the big shops have full blown "proper" HPC, shared-ram setups, etc. However, it's common to see much more simplistic parallelization with very ad-hoc clusters being used.

In short, there are loads of processing shops that run off-the-shelf servers on gigabit ethernet, and they do a good business with it. Heck, there are loads of processing shops out there that do a good business running relatively crude time migrations.

about a year and a half ago
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World's Most Powerful Private Supercomputer Will Hunt Oil and Gas

Garin Re:So how does it work? (135 comments)

Seismic imaging. Imagine solving a wave equation (acoustic, elastic, or worse) over a 3D grid many kilometers on a side with grid spacing on the order of meters. Imagine you're doing it with a strong high-order finite-difference code. Calculate for tens of thousands of timesteps. Now repeat that entire thing thousands of times for a given full survey.

No matter how much computer you have, it's never nearly enough for seismic imaging.

about a year and a half ago
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World's Most Powerful Private Supercomputer Will Hunt Oil and Gas

Garin Re:Public access? (135 comments)

No, the public won't see these results as a rule, at least not right away (while it's still commercially valuable to protect as a secret), though strictly speaking it depends on the countries involved. Nor would it matter for property value, as the "land owners" usually don't own the mineral rights in most places. Furthermore, this setup will be used probably mostly for marine/offshore seismic imaging, ie not much land involved.

about a year and a half ago
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Rob "CmdrTaco" Malda Resigns From Slashdot

Garin as everyone else says... (1521 comments)

Thanks!

It's sort of amazing that this site has consistently been my browser home page for sooooo many years.

more than 3 years ago
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NASA Scientists Simulate Black Hole Collision

Garin Re:Addendum (63 comments)

I was at that conference I think (U of C, CUPC?) and I saw the same videos. I also believe they were the same thing. Maybe they've been recreated with more precision or something? I hope so.

more than 8 years ago

Submissions

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Global anoxia ruled out as main culprit in the P-T extinction

Garin Garin writes  |  about a year ago

Garin (26873) writes "The late Permian saw the greatest mass extinction event of all-time. The causes for this extinction are hotly debated, but one key piece of the puzzle has recently been revealed: while the deep-water environments were anoxic, shallower waters showed clear signs of being oxygenated. This rules out global anoxia, and strongly suggests that other factors, such as the Siberian Traps vulcanism, must have played a dominant role.

From the article: "Rather than the direct cause of global extinction, anoxia may be more a contributing factor along with numerous other impacts associated with Siberian Traps eruption and other perturbations to the Earth system.”

See the full research article (behind a paywall) here."

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