Recent comments in /f/science

Thermodynamicist t1_jb5vyoq wrote

The question is how this overall warming effect is distributed.

E.g. assume it's 15 ºC average to begin with. We might approximate this as a sine wave over the year with an amplitude of 10 ºC.

In the case of 3 ºC warming, we might then have 18 ºC with the same 10 ºC amplitude sine wave, or we might have 18 ºC ± 20 ºC. These scenarios would be very different despite having the same average temperature.

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messopotatoesmia t1_jb5uo7h wrote

So you're saying that everyone should ride bikes, and there's never a reason not to own one?

Edit: oh you post in r/fuckcars. Never mind - I can't expect to have a rational answer from you.

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messopotatoesmia t1_jb5uhnr wrote

I'm going to wait on getting an ebike until I can leave it chained outside a store without expecting people to show up with bolt cutters to steal it - which is the reality for Seattle right now.

You do miss the point entirely though:

You can't take two kids to school on your ebike.

You can't ride your bike if your knees are giving out.

You can't get a week's worth of groceries for a family of five on a bike.

You can't drop kid A off at elementary school, and kid B off at middle school across town, and do the reverse before you run out of after school care, if you're on a bike.

The reality is that we need solutions that work for a variety of different people. That solution for many has to include a car, because in the US our cities are huge, and we need to get around and across them.

So while biking is great and I'm all for it, it's not a blanket solution for everyone and never will be. It's not even a blanket solution for most people - in Seattle biking drops to near zero in the winter along normal bike commuter routes. Are those people getting the bus? Maybe. Not all of them. Many of them are just taking their car in the winter.

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[deleted] OP t1_jb5ty2l wrote

You are correct. "Right echo chambers" are most of the time even smaller (but often "louder", therefore, the right chambers appear larger than they are). But this one here is very focused on small but polarizing topics. This shape seems exceptionally "designed" showing strange communication patterns (presumably amplified and intended by Kremlin-orchestrated troll accounts). That is what the study is saying. Nothing more, nothing less.

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messopotatoesmia t1_jb5tfds wrote

How would you change it? Remember that deliveries and emergency vehicles and buses still need to get around or it's pointless - which means that in many cases you're still looking at 3-4 lane arterials at a minimum.

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Lesurous t1_jb5t5ji wrote

True, but there's an aspect that should be included, which is taking trucks off the roads too. Live in Texas, trucks everywhere and even drive one myself, but they're not fuel efficient in comparison to a passenger car when it comes to just transporting people.

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messopotatoesmia t1_jb5t26e wrote

Again, you're making weird statements. Businesses have parking based on how busy they are, not based on the total size of the car-owning population. That's dumb.

Also many of these studies use computer-based ai systems that - at least in my neighborhood - treat playing fields and back alleys and the roofs of hospitals as parking structures, so I wouldn't trust those estimates.

Try about 2.5x for older cities) geographically constrained ones. In the south you might see different densities.

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messopotatoesmia t1_jb5sfu8 wrote

Try reading what I wrote again, in context.

The whole point is that walkable neighborhoods rapidly become "I need a car because..." the moment you're not a hip young urbanite without walking problems, or kids, or needing to bring groceries home to feed a family.

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burnerman0 t1_jb5quwq wrote

Except it's not a 1:1 ratio of taxi users and taxi cars. If a taxi covers the commute for 15 people in a day, then it's +1 and -15. It is less vehicles on the road. But.... It's more miles driven because the taxi has to get from fare to fare.

ETA: taxis subsidize the cost of car ownership, they don't reduce congestion.

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burnerman0 t1_jb5qj8c wrote

Less cars compared to everyone driving themselves, but more miles driven by cars because that one car needs to commute between dropoff of one person and the pickup of the next.

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DoctorZiegIer t1_jb5owqq wrote

Ancient horses were too small and didn't have a back strong enough to support riding.

 

Horse were definitely already semi or fully domesticated, plenty of evidence shows they were used to pull chariots and carry cargo, but to carry an entire person with no issues requires bigger and stronger horses that probably didn't yet exist before ~3000 BC

 

Horses were used over 5000 years ago, but we couldn't yet ride them, they could not handle our load

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