wolf550e

53 ms·

721.
by wolf550e 9y ago
At separation, Falcon 9 first stage is doing about 2500 meters/second and is at about 70km altitude. The two connected 747s flying in formation don't get that fast (or that high, but horizontal velocity is much more important).
722.
by wolf550e 9y ago
Have you looked at BearSSL? It has constant time AES[1]-GCM[2] optimized for ARM Cortex M0 (32bit microprocessors that go into USB cables: http://www.cypress.com/products/ez-pd-ccg2-type-c-port-contr... ) 1 - https:&#x
723.
by wolf550e 9y ago
Ubuntu 16.04 is pretty old code. I would try a mainline kernel (currently http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11.3/ ) and maybe even more up to date userspace libraries (but then you're gett
724.
by wolf550e 9y ago
Not everything is a document store. Some people actually have normalized schemas with foreign keys. TokuDB doesn't support foreign keys. Can Fractal Trees technology support the exact same API as B-Trees, only faster? I don't know
725.
by wolf550e 9y ago
They only implemented a decompressor.
726.
by wolf550e 9y ago
zopfli is just a compressor for the standard DEFLATE (zlib) format, able to make png, gzip and zip files a bit smaller. It spends a lot more CPU time doing the compression to achieve marginally better compression ratios (i.e. it's like
727.
by wolf550e 9y ago
They're comparing LZ4-HC with something like zlib. They should compare against Google Zopfli instead of plain zlib (or equivalent). But yes, algorithmic improvements and encoding on a modern CPU mean you can do decode on ancient hardwa
728.
by wolf550e 9y ago
for reference, see "base64url" in this table: https://en.wikipedia.org/wiki/Base64#Variants_summary_table
729.
by wolf550e 9y ago
Tsiolkovsky is very clear about the propellant mass fraction needed for single stage to orbit, and it is unachievable with current materials, i.e. you can't build a useful SSTO using Al-Li tanks. https://en.wikipedia.org&#x2
730.
by wolf550e 9y ago
Thank you. Yes, I understand that theoretical computer science is math and the result is a proof. I'm more used to papers where the interesting part is a benchmark, with a "proof of correctness" part I can safely skip. And in
731.
by wolf550e 9y ago
If you can, you should upgrade from DEFLATE (the compression format in zlib, gzip, zip files, png, office docs, etc) to something more modern like zstd. If you must preserve ability to decompress by zlib, there are different implementations
732.
by wolf550e 9y ago
To get perfect parsing LZ, you need a lot of space to store backreferences. When you increase the window size, the space grows a lot. I don't know what zstd does, but I would love to see it improved by algo magic.
733.
by wolf550e 9y ago
It will take me a while to read the paper. I saw there is no code inside. Do they have code that improves LZ parsing as used in all general purpose compressors? If they don't have code, can their algorithm be implemented to improve per
734.
by wolf550e 9y ago
Risk reduction is a completely normal term in R&D. It just means experiment to raise confidence in a particular proposed approach, before going full scale production. It is meant to raise the TRL[1] of a technology, to gain experience w
735.
by wolf550e 9y ago
The combustion byproducts are toxic and some uncombusted propellants are left in the pipes and can leak out. Has to be washed. The emergency APU on F-16 fighters uses hydrazine and if it was used and the jet landed on a civilian airport (e.
736.
by wolf550e 9y ago
SNC are building a small shuttle-like thing that lands gently on a runway. they planned to build a crewed version, but lost the NASA competition to SpaceX and Boeing. They won a contract for cargo, with an unmanned variant, possibly because
737.
by wolf550e 9y ago
You can migrate to Django 1.11, it's also LTS like 1.8.
738.
by wolf550e 9y ago
http://onlinelibrary.wiley.com/doi/10.1111/ibi.12482/full
739.
by wolf550e 9y ago
The disruptiveness is measured by the effect, not the effort.
740.
by wolf550e 9y ago
Why doesn't Cloudflare run a serious CT log?
741.
by wolf550e 10y ago
from https://www.bloomberg.com/view/articles/2017-04-20/juice-mac... : Of course Juicero could probably make a nice living selling $8 juice packs without bothering with a fancy machine. But then it wouldn&#x2
742.
by wolf550e 10y ago
He turned his containers into intrusive ones. The standard C++ STL containers are not intrusive. Boost comes with intrusive containers, but if you need a third party library, you can do that in C too.
743.
by wolf550e 10y ago
Their number 1 problem is the name.
744.
by wolf550e 10y ago
'pavlov meant that the entire EU switches to daylight savings time on the same date.
745.
by wolf550e 10y ago
Meeting the "candidate" lets you apply some judgement about them that you can't use from just reading a CV (or just knowing their past GPA). How they look, how they dress, their accent, their body language, etc. People think
746.
by wolf550e 10y ago
https://support.apple.com/en-us/HT207688
747.
by wolf550e 10y ago
In the Post-Mission Press Briefing [1] Elon Musk said SpaceX will gift the stage to "the cape" (so either NASA Kennedy Space Center or the CCAFS) because it's historic. Also, they don't need to keep the Block 3 cores, th
748.
by wolf550e 10y ago
Watch this: https://www.youtube.com/watch?v=IT6PFSRrvsU
749.
by wolf550e 10y ago
Not a joke, I believe this video will answer most of your questions about why a political thing works the way it does: https://www.youtube.com/watch?v=rStL7niR7gs
750.
by wolf550e 10y ago
Ryan Sleevi (Google's representative on the CA/B forum) has tweeted about what the CAs want and why they attack Let's Encrypt: they want the right to censor the internet. https://twitter.com/sleevi_/statu

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