Viewing profile — froj

I think this fixed wing drone https://ageagle.com/drones/ebee-x/ would fit your usecase.

3g for less than a second is really not to that much. Most people can easily withstand 3g sustained for minutes with (almost) no preparation. Just don't forget to breathe and maybe…

Maybe I need to refresh my memory. I should have some eggs lying around still. The nematodes also come with the lake water?

I think back in the day it was recommended to have at least 5 liters per adult triops. My tank was around 100l and I usually had at least a handful of them. Always females only; th…

I had Triops as a kid and never observed cannibalism. Is your tank big enough?

Well, 0th order approximations are fine if the gradient is indeed about zero for all intents and purposes. It's just very much not the case for exponential functions. Maybe your an…

The whole point of exp(t) is that the derivative at t is equal to the value at t. Thus if y_approx = 1 then the derivative is also 1 and not 0 (i.e. constant). If you're exponentia…

There's this super over-engineered fully automatic fish elevator to go up a 20m tall weir [1] (pdf and German warning). Interestingly, there is no safe way for the fish to go back …

It's not the object's mass that you care about, but its ballistic coefficient [1]. An object which is very heavy, but also very big, will deorbit just as quickly. [1] https://en.wi…

In my experience, the old-school electronics companies believe "if you can't stick a label on it, you can't sell it". In their eyes software is a necessary evil, but it only costs …

For injection molded parts you could start by paying a local consulting firm that specializes in mechanical design to take a look at your part. They will probably be able to help y…

In TFA they count 7.6B humans, but the mass is only the "dry-weight of carbon". So I guess the average person only contains about 8kg of carbon.

I used to work with small fixed wing drones [1] and had birds of prey remove the battery pack from the aircraft while in flight. I always wondered whether they knew or if they just…

Could be a neoboletus luridiformis with an unusually slim stem. In any case, I would say the color saturation in this picture is cranked up quite a bit.

Ships usually have inertial measurement units for heading and attitude. Even smaller boats have IMUs for better autopilot performance, but vessels of this size have sensors precise…

FANET [1] is specifically for paragliding. It is also LoRa based and open source, but so far only Skytraxx and Naviter really seem to be using it in their products. I think it's ex…

What about data matrix [1] instead of QR? The smallest symbol possible is 10x10 so that should be tweetable. [1] https://en.wikipedia.org/wiki/Data_Matrix

I don't know much about cattle or dairy farming, but in Switzerland cows are running around in the mountains with big bells around their neck and horns on their heads. Would such a…

We have a similar situation and use ccache and distcc is setup on each dev's workstation. It also helps to use forward declarations instead of including header files whenever possi…

That seems like a false analogy. In the case of thermal radiation you actually are emitting photons with a total power of 800W independent of your environment.

> normally it is balanced by a similar flux of thermal radiation coming in from the environment The parent comment wasn't talking about net power dissipation. 800W radiation would …

In control when you say optimal it usually just means that you solve your problem by defining a cost function which you try to minimize within constraints. For example in motion pl…

Are there any plans for attitude control or at least de-spinning?

According to [1] the numbers for Switzerland are about 13k tests and 1.7k cases per million, which would be somewhere below the Faeroe Island. [1] https://www.bag.admin.ch/dam/bag/…