David Gessel

Chernobyl

Friday, June 17, 2011 

Carolyn and I visited Chernobyl with the Singularity University reunion in Kiev.  Tours will take your right up to the containment structure covering the destroyed reactor.
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This is the reactor containment building.  There are places inside that are still very radioactive, but the grounds are not.   They have been generally decontaminated and over the 25 years since the explosion, the topsoil has increased 10cm or so, so most of the radioisotopes are buried and surface radiation is low.
Construction is happening now on the new containment structure, a gigantic concrete shell that will be constructed just west of the containment building and will be moved over the entire building shown here and is designed to protect the site for the next 100 years.

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Part of the tour took us to a school in Pryp’yat that was abandoned the day after the accident.  There are some iconic pictures that all visitors take and which I also took and will share later (including the famous Ferris wheel), but a room with a sea of gas masks was striking and I hadn’t seen it before.
Posted at 22:28:26 GMT-0700

Category: photoPlacesTravel

DIET FAIL

Monday, June 13, 2011 

Or effective comarketing.

The ice cream is $5/gallon and the Diabetes is FREE!
Posted at 15:53:41 GMT-0700

Category: FunnyGeopostphoto

How the “cloud” REALLY works

Tuesday, June 7, 2011 

Remember: everything you post to the cloud is ephemeral and public, no matter what the vendor promises.

Only use the cloud in cases where it does not matter if the data is there tomorrow or not or never again, and data you’d be willing to publish on a tumblr page.  If the data is sensitive or the remote record is important, do not trust 3rd party services.  Don’t be stupid.

Posted at 08:02:34 GMT-0700

Category: Funny

TLS 1.0 Hatin’ the Game

Wednesday, June 1, 2011 

After much reading and interpreting, it became clear there was no more advice for configuration variations to get client cert login working. It seemed Chrome was doing it right, IE not even trying, and Firefox failing. No advice as to why and setting LogLevel to debug didn’t add much in the way of useful hints.

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Jared Davenport, for reasons that would never have occurred to me, tried turning off TLS 1.0 in firefox as an allowed protocol. PCI compliance requires turning off a bunch of weaker/compromised protocols and ciphers anyway, so I already had:

SSLProtocol -ALL +SSLv3 +TLSv1

A quick test of

SSLProtocol -ALL +SSLv3

solved the problem with firefox. IE still refuses to talk to SSL, but IE is a stupidhead anyway. OK, it annoys me as the same client cert works on CACert.org’s site so something there is working right that isn’t on my box, but as I never use IE, I think I can let it go

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Posted at 01:21:25 GMT-0700

Category: FreeBSDLinux

Awesome SSL client cert fun

Tuesday, May 31, 2011 

Client cert authentication is oddly elusive given the practical value. I found a neat bug:

with
SSLVerifyClient optional
SSLVerifyDepth 3
SSLCADNRequestPath /usr/local/openssl/certs/clientcerts/

I get a request for identification in firefox, no problem. If I choose the right certificate to respond with I get an instant child pid 61501 exit signal Bus error (10). Every click on the “OK” button gets another seg fault. Yay. Magic.

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Posted at 00:36:09 GMT-0700

Category: FreeBSDTechnology

Isabella

Friday, May 27, 2011 

Bad video of good guitar at graduation

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Posted at 20:21:55 GMT-0700

Category: video

Radioactive Mudworms (1991)

Monday, May 23, 2011 

I animated Radioactive Mudworms in 1991 with a program called Infini-D.  The soundtrack was courtesy of David Lenat. It was first published on the QuickTime Beta CD to Apple Developers and then in 1992 re-rendered on a Mac IIfx 40mhz 68040 with a massive 16MB of RAM in this version for the FigTime commercial CD. As I remember it, this took about a week to render on that massive machine.  I’m pretty sure I ray-traced it, but I output to “thousands” of colors as required by the CODEC and so it is hard to see some of the details.

The file is so old that the “animation” CODEC (RLE) used is no longer supported.  I had to boot my old Mac 8600 to read the CD and convert the file to uncompressed, so I could re-compress it with a modern version of QuickTime.  I was greeted with an alert that my last backup was in 2003.  Time flies, but the mac still runs and that OS 9 operating system is still a nostalgic pleasure.  I used it regularly from 1987-ish to 2003-ish, and it is still the OS I’ve spent the most hours in front of.

Digital obsolescence is starting to consume my work history as the past has already eaten the DECstation streaming tapes my MIT work was “archived” on.  Of course, I can still read my preschool notebooks and I’m sure I could still read my parents notebooks.

Infini-D was my favorite 3D program of the time, though it was supplanted by StrataStudio 3D, Turbo-3D, and finally ProEngineer. It had a nice combination of modelling, rendering, and animation tools and was part of a brief “golden era” of 3D most remarkable for VPL and the existential excitement around Virtual Reality, which comes and goes every decade or so as a new generation reads Snow Crash and thinks that they, too, could be Hero Protagonist or Raven and have a chance with someone like YT if only the world truly adopted VR.

I was reminded of Radioactive Mudworms as I spent the weekend trying to teach the basics of video compression remotely to some coworkers who may not have been born when I made this.

The video was encoded at Valley Green 6, in the cube farm for the Advanced Technology Group at Apple.

A very old .mov version: https://gessel.blackrosetech.com/wp-content/uploads/2011/05/Radioactive-Mudworms.mov

And because technology, here’s an AV1.webm version for the next 32 years given that VP9 may be replaced once Apple gets on board, if they do.

 

BTW, the conversion is

ffmpeg -i Radioactive-Mudworms.mov -vf scale=-1:250:flags=lanczos  -c:v libsvtav1 -pix_fmt yuv420p10le -preset 0 -svtav1-params tune=0 -b:v 0 -crf 22 -pass 1 -an -f null /dev/null && \
 ffmpeg -i Radioactive-Mudworms.mov -vf scale=-1:250:flags=lanczos -c:v libsvtav1 -pix_fmt yuv420p10le -preset 0 -svtav1-params tune=0 -b:v 0 -crf 22 -pass 2 -c:a libopus Radioactive-Mudworms-AV1.webm

 

Posted at 04:21:18 GMT-0700

Category: CodeTechnologyVanity sitesvideo

Pleasant Post Apocalyptic Sunday

Sunday, May 22, 2011 

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The world of the left behinds seems fairly pleasant.
Posted at 18:49:07 GMT-0700

Category: Catsphoto

Security Salve

Tuesday, May 10, 2011 

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Posted at 14:57:07 GMT-0700

Category: MilphotoTravel

On the Road in Iraq

Tuesday, May 3, 2011 

We took a very nice tour from Baghdad to Basrah by car. The countryside is pretty amazing, from the relative lushness of the fertile crescent to the desert sands of the south to the marshes of the deep south and the distant flare gas fires on the horizon.

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Normal flare gas

Ut oh, blow out…

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Camels in the desert… camels crossing the road:
Posted at 14:46:28 GMT-0700

Category: photoPlacesTravelvideo