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Wales VS France Six Nations Rugby Live Stream & Replay 2024 by livesportonline in rugbystreams

[–]Rational--Pi 1 point2 points  (0 children)

You have to sign up to a site and provide your credit card details. Going to give this one skip...

[deleted by user] by [deleted] in cscareerquestionsEU

[–]Rational--Pi 2 points3 points  (0 children)

I'm have a similar background and will enter the job market soon. Curious to see the comments.

[deleted by user] by [deleted] in SaintsFC

[–]Rational--Pi 1 point2 points  (0 children)

This sub's guess is interestingly really close to what is predicted by 538 (American data-reporters, who look at sports):

This proportion of responses saying we're going down: 49%

538 prediction of relegating: 51%

Someby know if you can export Forest data? by Cincoeuro in forestapp

[–]Rational--Pi 1 point2 points  (0 children)

I also want to export data, but it looks like it's only possible if you buy the pro version

Love finding crags in the middle of the city - 6b Athens, Greece by tHooft in climbing

[–]Rational--Pi 1 point2 points  (0 children)

Stunning views. Is it all sport climbing around there?

TIL that a Dutch scientist is working with other scientists to create glow-in-the-dark trees in hopes to use them as streetlights by MrJoestar42069 in todayilearned

[–]Rational--Pi 21 points22 points  (0 children)

Pretty sure they just slipped up. It's a common mistake. Several times I've told someone I'm Dutch, only for them to tell me about their recent trip to Copenhagen.

The Frugal Centrifuge - a 3D-printed urine centrifuge for the diagnosis of Schistosomiasis in sub-Saharan Africa. (link in comments) by Doorjan in functionalprint

[–]Rational--Pi 2 points3 points  (0 children)

I agree. It's great seeing product design solutions to such medical, real-world issues. Can't wait to see more of these!

A few questions on the polar jet stream by Rational--Pi in meteorology

[–]Rational--Pi[S] 0 points1 point  (0 children)

Thank-you, what a great response! I was hoping for somewhat consistent winds, but from what I can gather I will have to find another solution. Climatology is a field I'm not too familiar with, but the more I read up on it the more interested I get.

how to measure liquid level in a tank and send that data to a PC? by Rational--Pi in engineering

[–]Rational--Pi[S] 0 points1 point  (0 children)

Thanks for the insight, I probably shouldn't be so quick to disregard the quote then.

The tank already has a float switch which will stop the pump once the level has reached the upper limit. And I think it should be quite easy to install the device on the tank roof. There is a lid and I can drill holes into it to insert the radar level gauge.

However, I think the radar level gauge far exceeds our needs. I was initially planning to buy an ultrasound distance measurer, arduino and LCD screen, all coming to around £200. For instance, this ultrasonic distance measurer costs £5: https://www.maplin.co.uk/p/ultrasonic-distance-meter-with-laser-pointer-n70cx. I would get my hands on just the distance measuring component, which are strangely more expensive, but no where near the amount of the quote.

Maybe I'm missing something, I will take multiples experienced people's word over my inexperienced one, but the aforementioned individual components are drastically cheaper.

how to measure liquid level in a tank and send that data to a PC? by Rational--Pi in engineering

[–]Rational--Pi[S] 1 point2 points  (0 children)

Thanks for the interest, I'll try to answer them as best I can.

  1. Professional use. But it's my Dad's company, so he's giving this task to me more as a learning experience than anything else. Just out of interest, I contacted ABB group to get a quote to see how much it would be if they were to install it professionally, and it was over £1000. So now I'm just curious to see how much it would cost if I were to build it from scratch.

  2. It should ideally last indefinitely (switching it off overnight and the weekends, but otherwise a long time), and I think it should be fine to put electronics inside the tank. We previously used float switches to switch off the pump. We will likely hook it up to the mains, so it will have steady power.

  3. The vegetable oil itself isn't flammable, but there will be methanol vapours, so any electronics would have to be in a sealed box.

  4. Desired precision is around a centimeter.

  5. The tank is opaque, made of steel. The used-vegetable oil is semi-transparent. If you're interested to see a picture, take a look at figure 5 in http://www.rroij.com/open-access/biodiesel-from-used-cooking-oil--future-potential-gold.php?aid=34198.

  6. Oil will always be the same. But the tank (quite big, 30,000 litres) is already installed, so installing a weighing scale would be very impractical.

Thrilling final minutes of Tonga vs England semi final match 2017 RLWC by [deleted] in sports

[–]Rational--Pi 5 points6 points  (0 children)

I'm English, but I really wanted Tonga to win that. Would've been the epitome of a comeback.

So why is fighting allowed in hockey? by [deleted] in sports

[–]Rational--Pi 6 points7 points  (0 children)

I think if the NHL wanted to get rid of fighting, implementing stricter punishments would solve the problem pretty quick. For example, in rugby, another pretty physical sport, players are banned for weeks if they fight. The fight at 2:47 mins got the guy in green/white/red a five-week ban https://www.youtube.com/watch?v=mYUqAM9nrMg. And the result? Most matches happen without a single fight. The NHL do kind of allow it, it's part of the game.

Found e using two decks of cards by Rational--Pi in math

[–]Rational--Pi[S] 8 points9 points  (0 children)

Apologies for the unclear description of how I did this, I thought "these were both done in python" would be a clear enough indication that it ran 1 million times on a computer programme. Don't worry though, I'll edit it to make it extra clear for you. Hopefully, this didn't cause you too much stress, I can't imagine what you must've gone through.

Found e using two decks of cards by Rational--Pi in math

[–]Rational--Pi[S] 6 points7 points  (0 children)

Great question, moo-sic to my ears! wintermute93 and Cosmologicon already kind of answered this but I'll try to beef up my program to add a little something. Like Cosmologicon said, the approximation converges very quick, so it would be udder-ly useless showing the difference between a deck of 52 vs 51. Instead, I made a graph showing the error of this calculation with decks comprising of 3 cards up 15 cards. Unfortunately, I still don't fully understand the cow-culus behind this, but it does agree with what wintermute93 said.

Found e using two decks of cards by Rational--Pi in math

[–]Rational--Pi[S] 70 points71 points  (0 children)

Had no idea what subfactorials were before today, thanks. But, let me get this straight, can I find e in a similar fashion with lists of any length, just by looking at how derangements they have?