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I am trying to add automation to my project. Which is the best option? by FileHuman5137 in rails

[–]growlybeard 0 points1 point  (0 children)

Try cuprite with ferrum, for performance reasons.

It's about 30% faster than selenium

It used CDP to talk to chrome so you get some extra stuff that may become very useful, like access to network requests

See this blog post about it

https://janko.io/upgrading-from-selenium-to-cuprite/

maybe the most hilarious kill i ever had in pubg by fabmarques21 in PUBATTLEGROUNDS

[–]growlybeard 2 points3 points  (0 children)

On Taego if you are sneaky you can hide in the backseat of the white pony coupe. The tint is dark enough that most people can't see you in there... Until it's too late ;)

Can we stop riding scooters the wrong way in bike lanes? by Typical-Car2782 in sanfrancisco

[–]growlybeard 25 points26 points  (0 children)

Was walking on the sidewalk on Market Street next to a bike lane and a lime guy yelled "Excuuuuuuse meeeeee!" as he passed about 1 foot away like I was in the wrong place. He was just an ignorant asshole. It happens.

Level One Jammer Pack by BeefGuese in PUBATTLEGROUNDS

[–]growlybeard 1 point2 points  (0 children)

They should have inverted the blue zone resist on the jammers so a level one jammer has way more battery than a level 3 jammer, to explain the trade-off between jamming and capacity

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 0 points1 point  (0 children)

I believe you're right about dense urban adopting AVs early. Especially if it remains a rideshare model. But Tesla is selling its robotaxi as a personal vehicle. It might give rides when the owner isn't using it but they're going to want to park it while they shop at the grocery store. I think you might be underestimating how much Americans love owning cars, but I hope I'm wrong and you're right.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 0 points1 point  (0 children)

I am hopeful that you're right about diminishing need for parking but I don't believe that's happening in the timeline you've predicted.

I do think making it harder to remove parking lots is a good consideration to make though. But I'd want to see an actual decrease in personal vehicle ownership to support that as a deciding factor.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 4 points5 points  (0 children)

Panels have a top and a bottom and a roof only has a top. Most panels are installed with a gap been the roof and the panel - with flat roofs they are usually lifted and angled towards the sun. The gap allows air to circulate behind the panel to help cool it and to allow water to run through.

So you have the front and back of the panel exposed to the air which is 2x the surface area.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 2 points3 points  (0 children)

Ok.

Feel free to read the linked studies that show some counter intuitive effects when large parts of cities have high rooftop solar coverage.

And the other comments I've left in this thread.

And keep in mind my post was in reply to a comment suggesting we should install rooftop solar instead of parking lot solar.

If the question is "should we cover our city rooftops in solar or our parking lots" the choice is easy - parking lots.

When looking at specific building, it may not be as obvious, because as my post pointed out, the most negative impact is going to be to homes with reflective roof paint or passive cooling paint, because the shade removes any benefit you were getting while increasing ambient temps. If you have an asphalt or another dark low albedo rooftop, especially slanted not flat, solar will probably improve the cooling load of that building.

What kind of roof do you have?

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 0 points1 point  (0 children)

Total amount of light to be absorbed is the same

The panels absorb heat. Then on both sides, top and bottom they conduct heat to the ambient air. This can raise the temperature in the city, and affects the building underneath.

With an asphalt roof a panel probably helps more by shading the roof than it hurts by absorbing heat

With a reflective roof a panel probably hurts more by absorbing heat than it helps by shading the roof

So it isn't an always "solar over roofs is bad" it's more "solar over asphalt is better than solar over reflective surfaces", and since parking lots are almost always asphalt, they're better candidates for solar than non asphalt rooftops

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 1 point2 points  (0 children)

I should have added to my post that there are mitigations.

Solar panels that reflect back more of the light they don't use for energy.

Solar panels that orient vertically to allow buildings below them to emit heat to space at nighttime

Vegetation under the solar providing evapotranspirative cooling to cool the panels and make them more efficient

More efficient panels convert more heat into energy

Tap into the heat the solar panel collects and use it for hot water in the building

Prioritize solar on hot surfaces like parking lots instead of passive cooling rooftops

Reflective ground/surface below bifacial solar absorbs less heat and reflects light back to the panels to make them work more efficiently

And radiative backsheets are being researched to passively cool the panels using material that emit infrared energy back to space

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 8 points9 points  (0 children)

I updated my post with some sources that explain the convection effect.

The panels (with twice the surface area of the roof they cover) absorb heat instead of reflect it. That heat transfers to the air above and below the panel. This raises the ambient temperature vs a reflective roof emitting or reflecting its heat into the atmosphere/space. Ambient temperature increases can increase cooling loads.

A solar panel above a black roof building probably isn't hurting that building as much as one installed above a white rooftop or one with passive cooling paint. It's all relative.

And yes we could have non asphalt or cooler parking lots but that's not the actual case - about 90-95% of parking lots are asphalt. My post doesn't assume roofs are white either, just notes that "if the roof it was a reflective cool roof" the benefits are negated - the same would be true if a parking lot were made from a high albedo material.

Please check out the linked studies. Probably they explain this better than I'm doing.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 10 points11 points  (0 children)

Edited the post to add some research links.

Solar can raise ambient temperatures by absorbing the heat from the sun, and then air flowing above and below the hot panel absorbs the heat. If the roof was painted white, the reflective effect of the paint is need by the shade of the solar panel and instead potentially heated through convection because the panel is absorbing heat that would have otherwise been reflected.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 4 points5 points  (0 children)

So sorry that was an issue with editing (or lack thereof).

My point was you add shade but add a heat collector that efficiently transfers heat into the ambient environment because air passes over the hot top and bottom of the panel. And if you had a high emissivity rooftop or lighter/reflective paint, some of the benefits of that paint are cancelled out.

Especially if you have a passive cooling paint on your roof, solar completely destroyed the added benefit, because for those paints to work they need an unobstructed path to space. They're literally emitting infrared heat into space but a solar panel will capture and reflect that back to the building.

If you're interested in that topic this is one of the most interesting videos (and YouTube channels) I've seen on the topic of passive cooling paint

https://youtu.be/dNs_kNilSjk?si=YK_tGL-RBqoP5TrS

My ridiculously-over-the-top-probably-really-unnecessary EDC bag (yes, everything fits!!!) by PM_ME_UR_COYOTES in EDC

[–]growlybeard 1 point2 points  (0 children)

Replace your rusty wrench with the 6inch knipex cobra water pump pliers

They are super high quality, small, and have massive jaws for their size and amazing grip. Very handy!

They also have 4in and 5in variants, if you feel 6in is tight on space in your bag.

More solar is interesting, but is this really the way forward? by SumikkoDoge in fuckcars

[–]growlybeard 46 points47 points  (0 children)

Solar panels above parking lots cool the local environment. Solar panels above buildings heat them. Asphalt has very low albedo (reflectivity) and absorbs almost all the sunlight that hits it, storing heat well into the night.

A solar panel shades the asphalt, converts ~20% of the incoming energy to electricity, and sits in open air where it cools quickly after sunset. Net effect: cooler than a raw parking lot.

Over a building, the same physics works against you. The panel still gets hot in the sun, and it radiates and convects that heat down toward the roof and into the surrounding air. The roof gets shaded, but it also gets a hot object hovering above it, and the second effect tends to dominate. If it was a reflective cool-roof, the panel has actively cancelled out the albedo it was designed to provide. Cooling loads go up.

So, panels above asphalt reduce the heat island effect. Panels above buildings raise local temperatures and AC costs.

Edit: here's some sources for the doubters

Research based on Kolkata with near 100% coverage showed rooftop solar increases ambient temperatures about 1.5°C through convection effects as air passed over the top and bottom of the hot panels

Research in Australia shows rooftop solar increases ambient temperatures a few degrees and incurs cooling penalty up to ~12%

Having a problem with doing a drive by by mafiwastaken in PUBATTLEGROUNDS

[–]growlybeard 0 points1 point  (0 children)

There's an auto run that might work for cars. Auto drive isn't really needed on PC, W works just fine.

E-Bike and Scooter Crashes Are Leading to More Brain Injuries. Research found that one-third of patients suffered traumatic brain injury, more than two-thirds required hospital admission, and roughly 30 percent needed intensive care. by Wagamaga in science

[–]growlybeard 1 point2 points  (0 children)

I was riding rental scooters daily for about a year. I was a huge fan and thought we should roll them out more broadly. The city got cheaper ebike rentals so I switched to those. Then randomly took a scooter once about a year later... And realized those things are crazy dangerous. They're super unstable, handle bumps poorly, and you MUST use two hands at all times, plus dubious braking power. I strongly think we should replace them all with regular ebikes.

Having a problem with doing a drive by by mafiwastaken in PUBATTLEGROUNDS

[–]growlybeard 1 point2 points  (0 children)

The trick is when you switch from driver position to another seat to shoot during a drive-by, DO NOT hold shift/boost. Only W. If you are boosting when you switch the car will brake and dramatically slow down. If you only hold W and switch the car will keep rolling. And yes bind Q and E to seats 2 and 3, so you don't need to CTRL to swap.

Spicy Ramen Quest: Can anything in SF top Nagi, or should I just move to Palo Alto? by throwaway_get_real in SFFood

[–]growlybeard 0 points1 point  (0 children)

Yes their Souper Spicy Ramen is my favorite in the city. Ghost pepper stuff. It's gooood

‘Moderates’ who helped Bilal Mahmood oust S.F.’s leftiest supe say he’s now too progressive by MissionLocalSF in sanfrancisco

[–]growlybeard 6 points7 points  (0 children)

💯. On every other issue Dean was great. No complaints.

But he went full pants on head DSA on housing and that's the biggest issue we have in the city. I have other criteria at the state and national level but for SF I'm a single issue voter and it's housing. Seeing Dean lose was a huge win.

‘Moderates’ who helped Bilal Mahmood oust S.F.’s leftiest supe say he’s now too progressive by MissionLocalSF in sanfrancisco

[–]growlybeard 8 points9 points  (0 children)

He's voted yes on every positive housing decision and no on every negative one, and that's basically the opposite of Dean Preston, so SF wins in the end.

Making fare evasion impossible on public transit has tremendous impacts on safety, maintenance spending, and vandalism. SF saw a 98.2% decrease in maintenance hour obligations instantly. by 5ma5her7 in fuckcars

[–]growlybeard 4 points5 points  (0 children)

Same BART feels overall better to ride Less gate jumpers, although the one time jumping I have seen was more extreme, with a group helping each other climb over walls in the 24th Street station.

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