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 contract your leg muscles a bit. Many can go up to 7g sustained with half a day of training.

[1] https://gforce.ch/

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; the males somehow never made it. They would only get eaten by their peers once they died of other causes. Maybe yours were lacking some protein in their diet?

First time I hear of anybody keeping Hydrae as pets.

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 analogy could work if you want to say that exponential growth might feel like linear growth locally?

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 exponentially growing, but currently it's approximately constant, then you're at t = -inf and you'll probably be dead by the time you achieve something significant.

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 down, yet.

[1] https://www.bkw.ch/fileadmin/bt3_news/MyConvento/2021/10/06/...

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.wikipedia.org/wiki/Ballistic_coefficient

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 money and doesn't generate any revenue. This is obviously wrong, as the products are worthless without the software and would probably sell better with better software. If they recognized the value of the software then they would probably pay their software engineers better.

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 you find a manufacturer and your design will have to be verified by somebody who does this for a living one way or another if you want it to work after a reasonable amount of iterations (better not forget those draft angles). You could also directly ask a local manufacturer of injected parts, as they will have engineers that can help you, but they might only want big customers. Also, that might close doors if you want to move production overseas.

Depending on the size and complexity of your part might just make it for $15k to get the tooling done. The manufacturing itself most probably will never make sense to do inhouse.

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 instinctively went for the "head" of the plane and got lucky that the battery was right there.

There were also reports from customers in Australia where eagles would just shred the drone to pieces almost every flight. Putting big googly eyes stickers on the wings seemed to help to some degree.

[1] https://www.sensefly.com/

Edit: Found the blog post about the eagles in Australia https://www.sensefly.com/blog/bird-drone-attacks-avoid-threa...

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 enough for strap-down navigation with little enough drift to bridge potential GPS outages.

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 exactly what you're looking for, though.

[1] https://www.skytraxx.eu/News/FANET

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 collar really be that dangerous for them?

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 possible.

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 be the case if the environment was at 0K. Usually, the environment radiates about 800W back at you.

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 planning your cost could be distance traveled + time spent + energy used. This cost function would be written as a function of the system state (position, velocity, etc.) and control input (e.g. throttle). The control input that limits the cost function is what you're looking for.

Optimal shouldn't be equated to the absolute best way, because it's always a question of definition.

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/de/dokumente/mt/k-und-i/akt...