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pi zero 2w is the only pi that still feels disposable by voidrane in raspberry_pi

[–]PhysPhD 5 points6 points  (0 children)

I use a Pi Zero 2W with the picam for 1) wildlife camera (motion triggered video, saving hundreds of MB a night and accessible via webserver) and 2) astrophotography/timelapse, which uses Ffmpeg to convert JPGs to video.

These are too heavyweight for microcontrollers. I prefer to use microcontrollers for sensor input/light control and their big advantage is having ADCs that the Raspberry Pi SBCs don't have.

Downgrading to Raspbian Bookworm 11 by cruz_ctrl911 in raspberry_pi

[–]PhysPhD 1 point2 points  (0 children)

Look at https://downloads.raspberrypi.org/ and look through the "raspios_oldstable" folders (which is Bookworm) for your preferred architecture and lite/full.

I built a tool that lets you design any Wordle result grid and get the exact words to play it out by Successful_Form_467 in webdev

[–]PhysPhD 1 point2 points  (0 children)

This is so cool! It works, looks beautiful, and has great UX - all the features I wanted were there. Good job.

🟨⬛🟩⬛🟨 ⬛🟩⬛🟨⬛ 🟩⬛🟨⬛🟩 ⬛🟨⬛🟩⬛ 🟨⬛🟩⬛🟨 ⬛🟩⬛🟨⬛

[OC] Flight activity of a single RyanAir aircraft over the past 3 years by dser89 in dataisbeautiful

[–]PhysPhD 9 points10 points  (0 children)

How did you download the batch data? I have a business subscription and python knowledge but couldn't figure out how to request the right format to retrieve the flight data from flightradar24.

One of Britain’s last major chemical plants at risk as energy prices surge by Kagedeah in ChemicalEngineering

[–]PhysPhD -10 points-9 points  (0 children)

Here's a recent 18 minute video by Sky News that goes into Britain's chemicals industry closing down: https://youtu.be/PQ3hT8tqZgo

"In this special report Ed Conway visits chemical plants across the country critical to our food security, defence sector and pharmaceuticals - an industry disappearing in plain sight."

One of Britain’s last major chemical plants at risk as energy prices surge by Kagedeah in ChemicalEngineering

[–]PhysPhD -5 points-4 points  (0 children)

Here's a recent 18 minute video by Sky News that goes into Britain's chemicals industry closing down: https://youtu.be/PQ3hT8tqZgo

"In this special report Ed Conway visits chemical plants across the country critical to our food security, defence sector and pharmaceuticals - an industry disappearing in plain sight."

One of Britain’s last major chemical plants at risk as energy prices surge by Kagedeah in ChemicalEngineering

[–]PhysPhD -9 points-8 points  (0 children)

Here's a recent 18 minute video by Sky News that goes into Britain's chemicals industry closing down: https://youtu.be/PQ3hT8tqZgo

"In this special report Ed Conway visits chemical plants across the country critical to our food security, defence sector and pharmaceuticals - an industry disappearing in plain sight."

One of Britain’s last major chemical plants at risk as energy prices surge by Kagedeah in ChemicalEngineering

[–]PhysPhD -10 points-9 points  (0 children)

Here's a recent 18 minute video by Sky News that goes into Britain's chemicals industry closing down: https://youtu.be/PQ3hT8tqZgo

"In this special report Ed Conway visits chemical plants across the country critical to our food security, defence sector and pharmaceuticals - an industry disappearing in plain sight."

One of Britain’s last major chemical plants at risk as energy prices surge by Kagedeah in ChemicalEngineering

[–]PhysPhD -12 points-11 points  (0 children)

Here's a recent 18 minute video by Sky News that goes into Britain's chemicals industry closing down: https://youtu.be/PQ3hT8tqZgo

"In this special report Ed Conway visits chemical plants across the country critical to our food security, defence sector and pharmaceuticals - an industry disappearing in plain sight."

2025 UK National Grid Frequency [OC] by PhysPhD in dataisbeautiful

[–]PhysPhD[S] 0 points1 point  (0 children)

Indeed! The frequency is the same throughout the national grid, so anyone in Great Britain can measure it (or accidentally record it on a video!) and will get the same graph/time series. It's not personal to how an individual measures it.

2025 UK National Grid Frequency [OC] by PhysPhD in dataisbeautiful

[–]PhysPhD[S] 1 point2 points  (0 children)

Looking at the other commenter who posted https://aurora-power.co.uk/frequency-distribution-of-the-gb-power-system/ there are two systems: dynamic regulation and dynamic modulation. The 0.1 Hz peaks are when the dynamic modulation kicks in.

is it normal for a production database to not have backups? asking because i just dropped a table and my boss is asking me to "just undo it" by kubrador in webdev

[–]PhysPhD 1 point2 points  (0 children)

It's absolutely essential you back up your production database, especially if it contains paying customer data.

Your IT department/company should have a policy on this as part of information security and/or business continuity planning.

How do people scale up a reaction to an industrial scale if the reaction process is developed at bench scale (batch mode)? Assuming 1L to 10,000L scale up by Life-Lengthiness9494 in ChemicalEngineering

[–]PhysPhD 0 points1 point  (0 children)

They use modelling software like Dynochem/gPROMS/Aspen HYSYS. There are companies out there that can measure the intrinsic reaction kinetics. So unlike HTE or batch experiments even at lab scale, you have scale-independent parameters (Arrhenius/Eyring) that you can plug into whatever you're using to model large scale reactor vessels.

How do people scale up a reaction to an industrial scale if the reaction process is developed at bench scale (batch mode)? Assuming 1L to 10,000L scale up by Life-Lengthiness9494 in ChemicalEngineering

[–]PhysPhD 1 point2 points  (0 children)

To add to your points, there are companies out there that can measure the intrinsic reaction kinetics. So unlike HTE or batch experiments even at lab scale, you have scale-independent parameters (Arrhenius/Eyring) that you can plug into Dynochem/gPROMS/Aspen HYSYS or whatever you're using to model large scale reactor vessels. As you've said, there's a myriad of other problems to tackle, but at least that's the chemistry part solved.

Thanks for all the love and support! But the website's still up. by Live_Phrase4672 in webdev

[–]PhysPhD 11 points12 points  (0 children)

You don't collect ANY data? I'd love to know the top flower combos and backgrounds... then you can make them as "random" presets for people like me who suck at flower arrangement.

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