WaterWaiver

joined 2 years ago
[–] [email protected] 2 points 2 days ago (5 children)

It looks identical to me. Same size before clicking, same size after right clicking -> Open image in new tab.

[–] [email protected] 2 points 2 days ago

GNOME 2 was fun and easy. It felt like they were trying to learn from the mistakes of Windows and Mac UIs.

[–] [email protected] 9 points 6 days ago* (last edited 6 days ago) (1 children)

Ooh thankyou for the link.

“We can leverage it [ray tracing] for things we haven’t been able to do in the past, which is giving accurate hit detection”

“So when you fire your weapon, the [hit] detection would be able to tell if you’re hitting a pixel that is leather sitting next to a pixel that is metal”

“Before ray tracing, we couldn’t distinguish between two pixels very easily, and we would pick one or the other because the materials were too complex. Ray tracing can do this on a per-pixel basis and showcase if you’re hitting metal or even something that’s fur. It makes the game more immersive, and you get that direct feedback as the player.”

It sounds like they're assigning materials based off the pixels of a texture map, rather than each mesh in a model being a different material. ie you paint materials onto a character rather than selecting chunks of the character and assigning them.

I suspect this either won't be noticeable at all to players or it will be a very minor improvement (at best). It's not something worth going for in exchange for losing compatibility with other GPUs. It will require a different work pipeline for the 3D modellers (they have to paint materials on now rather than assign them per-mesh), but that's neither here nor there, it might be easier for them or it might be hell-awful depending on the tooling.

This particular sentence upsets me:

Before ray tracing, we couldn’t distinguish between two pixels very easily

Uhuh. You're not selling me on your game company.

"Before" ray tracing, the technology that has been around for decades. That you could do on a CPU or GPU for this very material-sensing task without the players noticing for around 20 years. Interpolate UVs across the colliding triangle and sample a texture.

I suspect the "more immersion" and "direct feedback" are veils over the real reasoning:

During NVIDIA's big GeForce RTX 50 Series reveal, we learned that id has been working closely with the GeForce team on the game for several years (source)

With such a strong emphasis on RT and DLSS, it remains to be seen how these games will perform for AMD Radeon users

No-one sane implements Nvidia or AMD (or anyone else) exclusive libraries into their games unless they're paid to do it. A game dev that cares about its players will make their game run well on all brands and flavours of graphics card.

At the end of the day this hurts consumers. If your games work on all GPU brands competitively then you have more choice and card companies are better motivated to compete. Whatever amount of money Nvidia is paying the gamedevs to do this must be smaller than what they earn back from consumers buying more of their product instead of competitors.

[–] [email protected] 25 points 6 days ago* (last edited 6 days ago) (4 children)

really flashy guns and there is a very intricate damage system that runs at least partially on the GPU.

Short opinion: no, CPU's can do that fine (possibly better) and it's a tiny corner of game logic.

Long opinion: Intersecting projectile paths with geometry will not gain advantages being moved from CPU to GPU unless you're dealing with a ridiculous amount of projectiles every single frame. In most games this is less than 1% of CPU time and moving it to the GPU will probably reduce overall performance due to the latency costs (...but a lot of modern engines already have awful frame latency, so it might fit right in fine).

You would only do this if you have been told by higher ups that you have to OR if you have a really unusual and new game design (thousands of new projectile paths every frame? ie hundreds of thousands of bullets per second). Even detailed multi-layer enemy models with vital components is just a few extra traces, using a GPU to calc that would make the job harder for the engine dev for no gain.

Fun answer: checkout CNlohr's noeuclid. Sadly no windows build (I tried cross compiling but ended up in dependency hell), but still compiles and runs under Linux. Physics are on the GPU and world geometry is very non-traditional. https://github.com/cnlohr/noeuclid

[–] [email protected] 7 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

Triangle is an amplifier and rectangle is a black box ("don't worry what's in here, we promise it's not gremlins").

I suspect that the box might be a biasing array for driving the two output transistors, but then I would also expect two wires to come out of it (one for each transistor) rather than a single combined wire.

Broadcom's datasheet for their version of the part seems to be more akin to what I'm thinking:

Could be either. You'd have to decap the chip to find out, the datasheet writers thought these details were not important.

I have no idea why two of the output pins are tied together. They're not using many of the pins on this package so maybe they thought "why not". I've also seen dual-optocouplers in this same 8 pin package where pins 6 & 7 are the outputs of the two separate couplers.

[–] [email protected] 1 points 2 weeks ago

Some guy at the factory is removing the third paper from every unit before it gets boxed.

[–] [email protected] 3 points 2 weeks ago

So many CMCs seem to be marketed based of visual appearance and hope. I guess maybe people already have a design that works, so they go for things that look like clones visually? Otherwise I don't get how anyone would choose their product when there are alternatives with actual specs.

Another gripe: When the only datasheet available is a combined one with tables and graphs listing the specs of dozens of part variants. But yours isn't on there. So you find two similar models in the list and mentally interpolate between the graphs whilst worrying whether or not this is a long-term supply item or some spares that a retailer is selling off from a custom order run.

[–] [email protected] 4 points 2 weeks ago (1 children)

I just realised how hard it would be to manufacture this thing.

Imagine having to bend those copper wires into that shape around an already-existing toroid ring. Or maybe they glue together a few pieces of ring?

[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

Rotational symmetry :) EDIT: Wait no the paper! Arrrgh

[–] [email protected] 2 points 2 weeks ago (1 children)

It's 50 bucks though. Too expensive of a date for me.

[–] [email protected] 5 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

In the picture are 3 coiled wires, all sharing the same dark grey ring/toroid (but it looks yellow because it is wrapped in yellow kapton tape).

If you try and send the same signal through each of these 3 wires then they will all fight and cancel each other out (a bit like 3 people trying to through the same narrow doorway at the exact same time; no-one gets through). If the signals are different on each wire then they will get through fine (a bit like people going through a door at different times).

common mode chokes = choke/kill the signals that are common/same on all wires

You typically do not want common mode signals to exit your device and travel along cables, because then these cables act like radio transmitters. The exact reasoning for that is a bit more than I want to write here, but it's best explained with some pictures and phrases like "you turned your cable into a monopole you doof, use more common mode chokes and think of England".

Internally these devices work using magnetic fields in the dark-grey (ferrite) ring. I'm more familiar with 2-wire chokes where the coils are wound in opposite directions (so the magnetic fields they make cancel out), I am not sure how it works for 3 windings.

 

The thickness of the board beneath it gives deceptive scale. It's about 50mm tall and the toroid is 85mm in diameter.

https://www.lcsc.com/datasheet/lcsc_datasheet_2408061709_Ruishen-RSCM11548-5mH-3P_C37634003.pdf

I was looking for much smaller CMCs. Also the datasheet for this part doesn't have impedance-versus-frequency graphs so I refuse to buy it anyway :P

[–] [email protected] 5 points 2 weeks ago (1 children)

Microchannel coils: Wow. I assumed the pressures were too high for such construction to succeed. Thankyou :)

Fluid metering: I was aware of TXVs and capillary tubes, but not reverse bypass piston inserts. Would these options only be a few dollars difference in BOM price between each other? I guess the extra labour from soldering more pipes and connections for a TXV might be more costly than the extra materials themselves.

A vs N folded coils: interesting. I have mostly seen split systems and their unfolded coils, not central AC units with these A & N folded coils.

 

Context: I am not a fridgy, I work with electronics. I would love to answer my question by tearing open a dozen different aircon units, but I'm sorely lacking in that department.

Question: Are there some optional components or fancier materials that are simply too expensive to use in the lower end aircons; but are used in the higher efficiency expensive units? The range of COP/EER I see advertised is wild, from 2 to 6 or so.

I already vaguely understand that these things help efficiency:

  • Bigger indoor & outdoor coils with more metal in them (working fluids get returned hotter/colder gives better carnot efficiency)
  • Operating compressor at its optimal power level (I believe they have an efficiency vs power curve with a single peak, so it's better to use a bigger compressor if you need more power output)
  • Inverter control instead of on/off control (most situations, but technically some use cases will have them on par)
  • Choice of refrigerant (but that seems to be controlled in my market, I have not seen many options)

Is there anything else they change? Or is that most of the difference?

 

Location: Sydney, Australia. Found it during bushcare.

The brass barb fitting and the powdery filling suggest some sort of kiln burner to me, but the dark green paint on the outside of the tube looks rather ordinary and not like it has been through high temperatures.

The soft, powdery cemetitious filling has a copper-green tint. Only one end has a hole.

If it were not for the brass barb and coppery fill colour I would assume this is just a bit of structural steel from someone's carport (or similar) that has filled with cement and now been cut to pieces for disposal. But a carport with a barb fitting? WTH?

We find all sorts of garbage in this bushland because it's sandwiched in suburbia. Traditionally it was a dumping ground (mattresses, furniture, asbestos, whole cars) and today still people use it illegally as a dump (mainly building materials and soil). Lots of random materials get deposited by or uncovered by stormwater runoff & floods too. There is no limit to the craziness of what you find here.

 

Watching this now live on SBS. It's very confusing.

I cannot tell when actual footage is being used (AI colourised + cleaned up) or when it is re-enactments that have been re-colourised similarly to match. The program actively seems to not want me to be able to tell the difference.

It can't possibly be all based on period footage. There is too much in too high of quality and resolution.

Most (but not all of it) has had its framerate increased to be smooth, so I can't use that as a hint.

Sometimes the soldiers wave at the camera and the footage is a bit lower in quality. Other times they ignore the camera and look more like actors, but I can't be certain.

Some of the equipment looks wrong period (gasmasks) but I can't be sure. I really want to know now (I guess that means its a successful program in some ways). EDIT: Looks like the gasmask is legit!

Never thought watching a program on the SBS would unsettle me as much as this. I've seen AI colourised and interpolated footage, but not mixed with (what I think is) re-enactments in a way designed to stop you telling the differences.

EDIT: It's hard to find info about this show, it has a generic name and looks like it was only released this year.

 

The new theme seems deadset on replacing content with whitespace, driving my father in particular mad (he's having more luck finding Australian news on DW than the ABC right now; and he is sore that he has to hunt for the "Science" news category now in menus).

Not sure how long they'll keep the ?future=x flag available, but for now it gives you about double the number of articles per page.

 

Recommend engineer's bikinis (shorts).

 

8PM (right now) +/- 10 hours

Better call the tiberium harvester back in.

16
submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]
 

Encountered this fellow during bushcare today. He was sitting right on top of the bridal veil roots we were pulling, looking suspiciously like a rock.

We probably shouldn't have handled him (I hope turtles don't get dizzy from being turned upside down). We put him back down and hid him under some other groundcover as a local Kookaburra was loitering.

5
submitted 9 months ago* (last edited 9 months ago) by [email protected] to c/[email protected]
 

Imagine you're in the blue car, wanting to turn left:

Green is turning right. There is only one lane.

Two options I see:

(1) Stay behind the green car, to the left (and behind the crossing) until they leave.

(2) Pull up to the left of the green car (as if there were two lanes).

I assume (1) is correct given there is technically only one lane, but I can't find any materials on the NSW site or driving handbook about it and (2) is something I see other people do.

(I have my license test next week)

EDIT: Solved, option (2) is the right one. see https://www.nsw.gov.au/driving-boating-and-transport/roads-safety-and-rules/sharing-road-overtaking-and-merging/overtaking-safely

The only time you can overtake on the left is when the vehicle you’re overtaking is:

  • waiting to turn right or make a U-turn from the centre of the road
 

I could not find any mentions of these problems online. The article itself has no technical detail.

Looking forward to seeing what the actual problems are. It seems this is the first product to market.

Guesses based off the general subject matter:

  • Silica concentrations probably vary depending on the exact position of your head, especially since it's heavy material. If you mount this sensor even a few meters away from a worker then it's readings could possibly become invalid, eg because an angle grinder is firing dust a different direction to the sensor.
  • Silica is a slang term for a very big category of materials. Some might look completely different to others under certain laser observations, leading to some getting missed (bad) and others materials triggering false positives (leading to the sensor's screams being ignored by workers).
  • Self-cleaning routines might be needed to stop it clogging up, otherwise the sensor starts reporting a higher baseline. They could either choose to report this ("pls clean me" light comes on) or ignore it (bury head in sand mode).
  • Alternatively it's performance might actually be fine, but perhaps it's still being spruked inappropriately. Government involvement in funding the project might (?) magnify this problem.
view more: next ›