cynar

joined 2 years ago
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[–] cynar@lemmy.world 1 points 32 minutes ago (2 children)

While I'm rusty as hell, my physics degree was actually focused quite a lot into QM.

It's perfectly possible to get a reasonable understanding of what's going on without going head first into the maths. There are definitely areas however that we don't have a good conceptual model of yet. For those, the maths definitely leads the way. 90% of QM is comprehendible with relatively little maths. You only need the maths when you start to get predictive.

[–] cynar@lemmy.world 0 points 38 minutes ago

QM entities are quantised waves. You can make a wave look very close to a particle quite easily, a particle can never behave like a wave.

Dumping the mental short hand of particle interactions is one of the main reasons most people can't get their heads around it.

[–] cynar@lemmy.world 4 points 8 hours ago (3 children)

So why are you so upset with us trying to fix it?

I personally find the anti science, anti learning crowd has gone from amusing, to annoying, to terrifying.

[–] cynar@lemmy.world 4 points 8 hours ago (2 children)

I disagree with it being hard to comprehend. The maths is an absolute bitch, but the basic premise is fairly simple. Everything is (quantised) waves. The rest clicks, once you get your brain to accept this. Everything else is a consequence. Those consequences can lead you down deep dark tunnels, filled with evil maths and mind bending results, but the basic idea is simple.

I have a bit of an issue with memes that are actively misleading.

[–] cynar@lemmy.world 32 points 9 hours ago (8 children)

On a completely unrelated note, I recently got an air fryer. They're awesome! 😎

[–] cynar@lemmy.world 7 points 9 hours ago (3 children)

That is part of what bugs me.

Quantum mechanics isn't magical or unknowable. It's just an area of physics where some of our base assumptions/approximations break down. It's not even that hard to wrap your head around, it just seems most people don't want to try.

[–] cynar@lemmy.world 0 points 9 hours ago

So was "Donald Trump for president" and look at the damage that has caused.

[–] cynar@lemmy.world 4 points 9 hours ago

Perception and observation are different things. Air molecules can be "observers" when looking at electrons etc.

[–] cynar@lemmy.world 55 points 12 hours ago (26 children)

This sort of comic always bugs me. Observation in QM is not the same as observation in layman terms.

Best think of it as hit it and watch the pieces fly. When you get small enough, you can't approximate out the impacts. It's akin to studying road traffic by sending an overloaded freight truck the wrong way and counting tires that hit the verge. It might also affect the current traffic's motion.

[–] cynar@lemmy.world 13 points 14 hours ago

Orbits are all about speed, not height. To deorbit, you need to reduce your speed at the highest part of your orbit. This will lower the lowest part. You jump off the back. You would need to jump FAR harder than your legs are capable of though.

Unfortunately, the sheer speed will kill you, without shielding. As you hit the air, you are going so fast, the air can't get out of your way. You compress it ahead of you, that heats it up. It gets hot enough to melt most metals. The air will cook you, long before you get slow enough to use your parachute.

For comparison, terminal velocity (max speed you reach falling) is around 200km/h. Orbital velocity is 7km/s or around 25200km/h.

[–] cynar@lemmy.world 2 points 15 hours ago (1 children)

The reason that neurodivergent became a term is that it also includes people who are slightly different from normal, but not necessarily diagnosed, or diagnosable.

Using these as your primary love indicators is odd, not bad, just non-normal. It's common amongst NDs, but far less so amongst NTs.

[–] cynar@lemmy.world 13 points 1 day ago

It's worth remembering that autism is a spectrum. We are at the higher end, many benefits, with limited downsides. Others aren't as lucky.

The argument was also a bypass type. Even if vaccines cause autism, and even if autism is entirely bad, it's still worth getting vaccinated. It cuts a lot of the talking points off at the knee. Even if we assume our opponent's position, it's still not an argument in favour of what they are saying.

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submitted 3 months ago* (last edited 3 months ago) by cynar@lemmy.world to c/asklemmy@lemmy.world
 

My daughter is 5 now. She's discovered the joy of telling jokes. Unfortunately, her repertoire is painfully small. I've also realised most of my jokes are either not age appropriate or too situational.

What are best/worst kids jokes? Extra points for any that would make her teacher groan. Apparently she LOVES jokes. 😁

 

I need some advice, and the amount of marketing spam had made sorting the wheat from the chaff annoyingly difficult. Hopefully you can help.

I've a young daughter, who uses an old tablet of mine to watch netflix etc. unfortunately, it was old in the tooth when she was born, and it's now become extremely annoying to use.

She currently has a Samsung Galaxy Tab A (2016). The size (10") works well, but it's gotten slow as sin, and only has 16Gb of internal memory.

Preferences wise:

  • 10" screen (±2")

  • 64Gb+ storage.

  • Long expected lifespan (inc security updates).

  • Headphone socket (adapters are asking to get broken, Bluetooth go flat)

  • Decent WiFi (more than just 2.4Ghz).

  • USB C charging preferred.

  • Wireless charging would be very helpful but not required.

  • Lower budget preferred (£200 range).

What would people recommend?

 

For those of you in the UK, IKEA currently has a steep discount on their GU10 bulbs. I've just picked up several dimmable, colour temperature controlled bulbs for £5 each.

They play nicely with HA via a sonoff dongle and ZigBee2MQTT, even down to firmware updates.

 

I've been using Ubuntu as my daily driver for a good few years now. Unfortunately I don't like the direction they seem to be heading.

I've also just ordered a new computer, so it seems like the best time to change over. While I'm sure it will start a heated debate, what variant would people recommend?

I'm not after a bleeding edge, do it all yourself OS it will be my daily driver, so don't want to have to get elbow deep in configs every 5 minutes. My default would be to go back to Debian. However, I know the steam deck is arch based. With steam developing proton so hard, is it worth the additional learning curve to change to arch, or something else?

 

I'm upgrading to a new laptop (unfortunately, a desktop is not viable for me right now). It's a VR gaming machine, with some potential work with machine learning (me learning about it). I've got a system option, but it's into price flinching territory, and wanted a once over, from those more in the know.

Are there any obvious flaws in it, and is it reasonable for the price?

  • Display: 1 x 16.0" IPS | 2560×1600 px (16:10) | 240 Hz | G-SYNC | 95 % sRGB

  • Graphic Card: 1 x NVIDIA GeForce RTX 4080 Laptop | 12 GB GDDR6

  • Processor: 1 x Intel Core i9-13900HX

  • Ram: 2 x 16 GB (32 GB) DDR5-5600 Samsung

  • SSD (M.2): 1 x 1 TB M.2 Samsung 990 PRO | PCIe 4.0 x4 | NVMe

  • Keyboard: 1 x Mechanical keyboard with CHERRY MX ULP Tactile switches

  • WLAN: 1 x Intel Wi-Fi 6E AX211 | Bluetooth 5.3

It prices up at €2,809.31 (£2,484.57 or $3,130.80) including shipping and taxes.

It's worth noting the system comes with an optional external water cooling system, so the CPU and GFX are less thermally limit, when it's plugged in. It also has a proper keyboard, not the normal membrane ones.

What are people's opinions? It is a reasonable price, or am I way too far up the diminishing returns slope?

https://bestware.com/en/xmg-neo-16-e23.html

 

My Google-fu has completely failed me. I've got an RGB addressable led curtain. It has 20 strings of 20 LEDs in a square arrangement. I initially assumed it had a wire feeding led data back up, to go to the next drop. On checking however, they are T jointed.

Apparently the address is hard coded into the RGB controller in the LED. I've found a few places where others have talked about them. I've also found that adafruit had some available,, unfortunately they lacked any info on how they are programmed, or where to source them from.

https://www.adafruit.com/product/4917

Anyone got any info on what the chip name of these is? Even better if you have any info on how they are programmed etc!

 

Might not be the best place to ask, but nowhere else reliant seemed alive.

My old laser printer has given up the ghost. What are people's recommendations on a replacement. As far as I'm aware, Brother are about the only company both making reasonably priced printers and not playing stupid games. Beyond that though, I'm not up to date on what's good and what's not.

Requirements.

  • Colour laser.

  • WiFi

  • Works with both windows and Linux

  • No need for scanner etc.

  • CD/ID card printing nice, but not required.

  • Photo quality nice, but not required (we have an ink sublimation printer for photos).

I'm UK based, which can mess with availability.

Thanks in advance.

 

All hail the lemming of Lemmy!

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