planteen

59 ms·

571.
by planteen 10y ago
The issue is energy density, not motors. The ship burns 1,660 gal/hr = 6000 L/hr when at "economical speed". The energy density of fuel oil is about 10 kW hr/L. Googling tells me that a journey between China and Cal
572.
by planteen 10y ago
There's also lots of distortion due to the equirectangular projection. When you are at +/- 90 degrees, 1 pixel is being stretched across the entire width. It would look more natural if it was mapped on a sphere. Or if the 2D image
573.
by planteen 10y ago
That doesn't solve everything. There are still textbooks published that use CGS instead of MKS units. Both of those are metric. Non-SI units are widely used in space (e.g., arcseconds).
574.
by planteen 10y ago
I agree development of the avionics is different from the RTOS. But what makes you say that the avionics algorithms aren't DO-178B? That is something the customer (gov't) would specify to the contractor. I didn't ever work on
575.
by planteen 10y ago
I'm not talking about self driving at all. I took your earlier comment to mean that the you thought the future of avionics control and other classical embedded problems would be using DNNs. Maybe that's not what you meant.
576.
by planteen 10y ago
What? The most popular choice for aircraft RTOS seems to be INTEGRITY which is written C/C++ itself. http://www.militaryaerospace.com/articles/2013/10/software-c...
577.
by planteen 10y ago
The F-35 (JSF) is DO-178B. The RTOS itself (INTEGRITY) is mostly C and C++. http://www.militaryaerospace.com/articles/2013/10/software-c...
578.
by planteen 10y ago
A team of PhDs using modern control theory can prove stability of an aerospace control loop across all different operating conditions. A team of software engineers can then implement that with static analyzers and run time checkers during d
579.
by planteen 10y ago
The compression on some is insane: NPP = NPOES Preparatory Project = National Polar-orbiting Operational Environmental Satellite System Preparatory Project
580.
by planteen 10y ago
What analog function exactly are we talking about here? I'm genuinely curious. There's certainly a fading art for lots of analog computing techniques, like taking the arctan or log of an input signal. But how is that useful for ne
581.
by planteen 10y ago
Whoa, that must have been scary
582.
by planteen 10y ago
I lived for a couple years in housing that was built for the Olympics when I went to GT. It was a nice building. I also used the aquatic center a couple times to practice kayaking. The coolest part about that pool was you could lower the fl
583.
by planteen 10y ago
I think a lot of that is changing due to the rise of Linux in embedded systems. Many more traditional software engineering concepts are becoming mainstream in embedded. And for embedded in high value (hundreds of millions of dollars) or hum
584.
by planteen 10y ago
Good story. I've come to realize software almost always gets the initial blame. Software is almost always the one painting the error screen. So even if it says "Voltage out of range", someone is going to accuse software of no
585.
by planteen 10y ago
I found the data you speak of from Voyager I and II years ago. It included the raw frames which were full of dots from Vidicon tubes. My guess is that New Horizons is still too new. I think scientists get exclusive access for a year or two
586.
by planteen 10y ago
Hire a sales person with ties to the industry. Find them on Linked In. Sales people are always networking.
587.
by planteen 10y ago
Yep!
588.
by planteen 10y ago
Warnings and static analysis tools are good, but wrangling them across multiple tools, architectures, and coding standards is hard. Really hard. Different compilers will throw warnings for different things. Linting gets crazy. A customer mi
589.
by planteen 10y ago
The game of Tetris.
590.
by planteen 10y ago
Very cool demo. I remember RPGs on the SNES looking line this. I'm guessing that the colors on this are gamma corrected. Are you doing a linear conversion then going back to a gamma corrected palette when building the fills table?
591.
by planteen 10y ago
Just curious, were you running with ECC RAM on the box?
592.
by planteen 10y ago
And that lots of emergencies will be related to weather, when the terrain will be covered by clouds.
593.
by planteen 10y ago
You could also add a volatile declaration
594.
by planteen 10y ago
Teachers in my area still get paid over summer. Their pay is distributed to run August-July.
595.
by planteen 10y ago
He shouldn't have brought anything ITAR sensitive with him out of the country on his phone. At a previous job, we were explicitly told to get a "travel" laptop which was wiped clean.
596.
by planteen 10y ago
What do they push instead? Python? Go? JS?
597.
by planteen 10y ago
I used to work on flight software for a private company. It seemed like inertia from "heritage" always drove lots of decisions. From my memory, I remember quality assurance from NASA getting hung up on the following items during d
598.
by planteen 10y ago
It was law until recently. WorldView-3 could image at a higher resolution than it was allowed to sell when first launched. http://blog.digitalglobe.com/news/resolutionrestrictionslift...
599.
by planteen 10y ago
This article is biased towards desktop environments, but misses embedded. Lots of RTOSes are POSIX compliant for things like Pthreds and file systems. Off the top of my head, VxWorks, RTEMS, INTEGRITY, and QNX all have POSIX compatability.
600.
by planteen 10y ago
No, and I took it a step further by thinking "There's no operating system kernel on original Game Boy games - they are bare metal with an executive loop!"

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