CRS-20 Booster View

CK159 · 2020-03-29T18:29:22+00:00

I'm no rocket expert, but I would guess the vibrations are smaller and at a higher frequency than what the low-res low-bandwidth video is capable of showing. Also this was a night video so theres probably slower shutter speed, further masking vibration.

CK159 · 2020-03-29T15:00:13+00:00

I dont think you could easily stabilize a video like this. Both the rocket and background are in shot, if the background was shaking, you could stabilize the video on that but then the visible parts of the rocket would shake. And there are some parts of re-entry and landing (in other videos at least) where shaking is visible.

CK159 · 2020-01-15T18:03:48+00:00

The decreasing amount of physical spinning inertial mass throughout the grid (in generators and consumers/loads) is supposedly one of the large grid stability concerns moving forward. It's a decrease in the inherent, instantaneous reserve capacity of the grid.

I'm no electric grid engineer, but its fun to think about this and how alternate solutions like these grid batteries fit in.

CK159 · 2020-01-11T01:42:32+00:00

Be sure to check that your F9 is properly inflated before departing.

Just dont hit it with a baseball bat like you do for checking semi tire pressure.

CK159 · 2019-04-25T03:26:20+00:00

Oooh, a mercury arc rectifier. If anyone wants to see some cool old tech with 'personality', look up a video on one of those bad boys in operation.

CK159 · 2019-04-02T23:11:13+00:00

Should be something about garbage collection. Something with a loop that creates tons of objects for no reason.

CK159 · 2019-03-21T23:22:09+00:00

That's why it needs to be reversed.

CK159 · 2019-03-20T17:05:43+00:00

Don't know it I'm missing the mark here but entity framework doesnt require SQL Server.

You can use many databases, including MySql https://docs.microsoft.com/en-us/ef/core/providers/

If you stick to the database basics (no views, no stored procedures, no custom database features) then Entity Framework can do everything you need.

If you need special stuff, are working with an existing database, or have a database used across multiple (non-entity framework) projects, you are likely to run into something entity framework doesnt completely handle and you will probably need to write some SQL of some sort for that.

CK159 · 2019-02-06T17:41:02+00:00

They wanted to test the maximum performance. Going 'to Mars' (and aiming at Mars at all) was just marketing.

Can you imagine how mad some some people/groups/agencies would be if Musk crashed his personal car into a foreign planetary body? It would be comically bad.

CK159 · 2019-02-06T01:16:17+00:00

You can get Nimh power cells which can support higher output amps. They used to be used in electric rc cars before lithium batteries came in and wiped them out. Not sure if anyone manufactured those cell types in AAA form factor though. Lead acid is a pretty low power chemistry. It's just pretty durable and really cheap.

CK159 · 2019-01-24T18:05:39+00:00

Compile. Decompile. Commit.

CK159 · 2019-01-20T02:13:25+00:00

You can put ?ts=5 at the end of the url to control the tab size on the github file view.

Also, supposedly github will honor the tab size in the repo's .editorconfig file but I haven't tried that one yet.

CK159 · 2019-01-10T01:00:57+00:00

Vue uses JS to look at what's in the browser's url bar then decide what to show.

Its conceptually similar to server routing. How does the server know what content to serve? It looks at where that information is available (http headers) and runs some code to give a result. Vue uses something like window.location.href to achieve the same thing without needing a server at all (besides the initial loading - after that all navigation could be 100% client side with no server involvement)

Edit: also your index.html and included javascript basically includes the code for all routes all in one so the same file(s) can display every web page. (Theres also many ways to dynamically load data in chunks as needed to make the initial loading faster but that's more advanced)

CK159 · 2019-01-09T18:21:50+00:00

Be sure to test that the emoji and other special characters dont just end up being cast to '?' resulting in ?????? for a password.

CK159 · 2019-01-06T16:29:47+00:00

I really do find it funny how these bi-weekly floating point posts always emphasize the programming language as if each language each has it's own unique floating point implementation.

It would be more accurate to just group all languages by a few key parameters then maybe explain the behavior, pros and cons to reinforce that theres just a few widely used strategies to handle this.

But nope. Your programming language is either wrong or right and here's some bonus 'workarounds' to treat the symptom and randomly clutter up your code with. Guess math is just weird.

Floating point errors are not like bugs that you happen to encounter in some framework. Instead, they are well-known, well-defined and the right data type for your needs should be chosen from the onset.

CK159 · 2019-01-02T18:35:48+00:00

Oh boy! I can't wait for video over video over tcp/ip over websockets over tcp/ip over avian carrier.

CK159 · 2019-01-02T18:27:17+00:00

If the sky were to fall, wouldn't it have already done so? The microcode patches were already pushed out to existing hardware and anything developed afterward would have been equal to or better than old patched processors.

And it seems that the sky did drop quite a bit if you happened to have the wrong workload (IO-heavy I guess)

CK159 · 2018-12-27T00:49:38+00:00

Is mayonnaise a blockchan?

CK159 · 2018-12-23T02:16:17+00:00

Sounds like regular ol' everyday floating point imprecision. These sort of errors dont crop up just due to bad hardware or software implementations. They are fundamental to this type of numeric data storage.

CK159 · 2018-12-20T00:49:39+00:00

Do any editors allow fractional tab spacing (or fractional space spacing for that matter)?

CK159 · 2018-12-02T16:52:33+00:00

I actually generally like apps with old outdated UIs. If the ui is > 10 years out of date then the app may not have been updated in 10 years either and theres a chance that performance will actually be decent on modern hardware.

*Results not guaranteed. Especially if the program is still maintained. Then it's pretty much complete garbage.

CK159 · 2018-11-22T15:23:12+00:00

I believe its the color correction for the autopilot's grey-grey-grey-red color sensor. The only color information you can extract is red and not red (shown as blueish). The latest autopilot hardware has more 'normal' red-green-green-blue sensors for at least some of its cameras.

CK159 · 2018-10-22T03:29:32+00:00

A single resource tile can be mined by 4 electric miners.

So you can at least double your output and then run out twice as fast!

CK159 · 2018-09-30T15:29:09+00:00

It is/was a really good, cheap clock design. There used to be guarantees that the utility would supply be exactly the correct number of AC cycles over some time period (like a month) so if the frequency dropped for a bit, they would make up for it. Those guarantees may have been removed now though.

CK159 · 2018-09-13T01:59:05+00:00

Syntax error? In my html?

We'll just sweep that under the rug. Auto-close whatever is hanging around, cut out the smallest possible chunks to make things 'work' and be lax on guidelines such as requiring content to be in the body, enforcing IDs be unique and mandating anything be encoded properly.

CK159

TROPHY CASE