gregburek

6 ms·

1.
by gregburek 15y ago
The press release (edit: and I) skipped a step: "A portion of the laser beam is split off with a glass plate and directed to a photodetector that provides the syn- chronization signal for the camera. The camera images the incoming light on
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by gregburek 15y ago
More informative link: http://web.mit.edu/newsoffice/2011/trillion-fps-camera-1213.... Imaging Systems Applications Paper "Picosecond Camera for Time-of-Flight Imaging": http://www.opticsinfobase.org/abstract.cfm?URI=IS-2011-IMB4 ACM pa
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by gregburek 15y ago
The MIT News Office article has more details than the PR video and a link to the paper: http://web.mit.edu/newsoffice/2011/trillion-fps-camera-1213.... The actual imaging device is just a long line of photosensors. The camera aperture use
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by gregburek 15y ago
Enable javascript to load current positions.
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by gregburek 15y ago
I have an electrical engineering background and all this FP VS IP sounds like Async Logic VS State Machines. How far off base is that description?
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by gregburek 15y ago
I'm getting the feeling that with all the unique server setups in use, monitoring and metrics systems are going to be just as unique and specific. There are some interesting process monitoring projects out there like god, monit and bluepill
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by gregburek 15y ago
How does everyone here gather and analyze their metrics? What do you have always deployed and what do you use when shit hits the fan? [Edit for typo]
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by gregburek 15y ago
Unfortunately, this last AWS problem affected multiple AZs in the us-east region. The OP very well may have had an alternate AZ failover plan, but like Quora, Sencha, Reddit, FourSquare and Heroku, they probably kept it region specific. As
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by gregburek 15y ago
I think that Microsoft Corp. v. i4i Limited Partnership, which was argued before the Supreme Court on April 18, may change how this plays out in the end. "Since 1983, the courts have followed a clear, firm rule: In order to overcome the sta
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by gregburek 16y ago
Convore is pretty new, but have you tried it for private chats? When it was announced, I immediately started to think how much easier it would be to set up for my non-technical co-workers. Link that explains basic functionality: http://gig
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by gregburek 16y ago
Build-out Script for Postgres/PostGIS with RAID 10 on Amazon EBS volumes: http://sproke.blogspot.com/2010/12/build-out-script-for-post...
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by gregburek 16y ago
I found a benchmark from 2008 that details the problems with RAID10 and sourced it in a comment above [1]. These are just raw disk transfer numbers, though. I can only imagine how they would change as CPU usage/postgres load climbs. IIRC d
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by gregburek 16y ago
It also seems that in 2008 adding mirroring also hurt performance. I'm going to dive into this tonight to see if things have changed at all with these benchmarks. "His results show a single drive maxing out at just under 65MB/s, RAID 0 hitt
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by gregburek 16y ago
Duly noted. I started with this talk and have been using it as a guide to scaling edge cases with python as well as AWS. I thought raid10 was overkill before I started digging into the postgres/EBS mess, but now it seem almost routine enoug
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by gregburek 16y ago
Thanks for the extra info! I'm doing a lot of work now with python on EC2 and the reddit write ups + presentations have been a huge help. Thanks again.
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by gregburek 16y ago
So, I assume instances reddit uses have instance storage root volumes instead of EBS root vols. I've always assumed the persistence of ebs AMIs was a plus without a downside. Why would you opt for instance-storage AMIs instead of ebs root
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by gregburek 16y ago
On page 500, under Discussion: "Blood tests assessing IgG levels against foods did not predict which foods might have a deleterious behavioural effect. ... We recorded no difference in behavioural effects after challenge with high-IgG or l
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by gregburek 16y ago
That conclusion was really buried in there. Some form of confirmation bias on the part of a reader, perhaps?
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by gregburek 16y ago
The hypothesis was that IgG tests may pinpoint foods that in some way trigger ADHD symptoms. This was found to be incorrect. "We recorded no difference in behavioural effects after challenge with high-IgG or low-IgG foods. These results sug
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by gregburek 16y ago
kgo may have been referring to how the contents of /private/tmp, /private/var/log and /private/var/tmp are not encrypted and may contain private information, such as com.apple.QuickLook.thumbnailcache. I've had some success using scripts on
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by gregburek 16y ago
I loved this series so much. It is a nice companion to this guide on creating a sick system: http://issendai.livejournal.com/572510.html
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by gregburek 16y ago
In my experience with business school and engineering school, EVERYONE asserts power before they earn it. Others may call it "fake it till you make it", but I would say that over-confidence and power games are rewarded in social constructs