Search found 24 matches

by paha arkkitehti
Thu Feb 22, 2018 1:01 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1958: "Self-Driving Issues"
Replies: 147
Views: 22393

Re: 1958: "Self-Driving Issues"

Problems I'm seeing in Aberdeen/Blackdog at the moment, which may confuse machine vision over humans. New roads (so not covered by GPS) No lines on the road (both new and existing) Driving against lane markings (instead of having two lanes in each direction, we are all on one half of the road with ...
by paha arkkitehti
Fri Jan 19, 2018 7:39 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1944: "The End of the Rainbow"
Replies: 48
Views: 7204

Re: 1944: "The End of the Rainbow"

niky wrote:A sextillion tons of gold.

You could bankrupt every country on Earth a million times over by dumping that amount into the economy.


Only because the physical weight of all that gold is enough to _crush_ the economy. And everything else on Earth.
by paha arkkitehti
Thu Jan 11, 2018 11:34 am UTC
Forum: Serious Business
Topic: Where does inflated value go?
Replies: 62
Views: 10139

Re: Where does inflated value go?

Apple isn't being inefficient by wasting money on style, it has adopted a different goal in its business. No. Its goal is the same as any other company: To make money. Its means is different however: To appeal to a desire for quality rather than saving money. Some people are happy with cheap and ch...
by paha arkkitehti
Wed Dec 06, 2017 3:06 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1924: "Solar Panels"
Replies: 60
Views: 6796

Re: 1924: "Solar Panels"

Sorry, engineering doesn't work like that. What you're describing is otherwise known as "debris flying into traffic at high speeds during a windstorm". So you anchor it down with steel spikes every couple meters. No biggie. Your road surface has the exact same problem; the "foundatio...
by paha arkkitehti
Wed Dec 06, 2017 10:45 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1924: "Solar Panels"
Replies: 60
Views: 6796

Re: 1924: "Solar Panels"

At present they're substantially more expensive. In the long run, I seriously doubt that. Yes, they need to be able to take varying compressive loads, and they have a wear surface. But they also don't need mounts, foundations, and face no meaningful wind loads (adhesive bound to the substrate). Yea...
by paha arkkitehti
Fri Oct 13, 2017 5:23 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1901: "Logical"
Replies: 24
Views: 4496

Re: 1901: "Logical"

Logical solution would seem to be more scientific study on feelings, so that we wouldn't be constantly blindsided when the world we see isn't the frictionless void we model.
by paha arkkitehti
Sat Sep 17, 2016 6:01 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

Transportation is dirt cheap. Yep, you can buy almost any foodstuff no matter the season. Brought to you by, wait for it, cheap oil. Oil price doesn't really change the equation, in fact it makes it worse. Transportation is only a tiny fraction of the overall carbon footprint of food, the majority ...
by paha arkkitehti
Sat Sep 17, 2016 12:11 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

To be fair, there actually is (as morriswalters points out) trade between Africa and Europe; and all around the world. But when you start talking about feeding the entire population of Europe (or even Northern Europe) or any other major population center entirely with food that is imported from tha...
by paha arkkitehti
Wed Sep 14, 2016 4:50 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

The person I was replying to said he was trying to avoid the massive upheavals caused by re-jiggering worldwide civilizations due to climate change. Stating that we can avoid that by causing massive upheavals and re-jiggering worldwide civilization right now seems to miss the point... :mrgreen: Of ...
by paha arkkitehti
Tue Sep 13, 2016 6:35 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

On the subject of concrete/pavement, a ballpark Google estimate is a total coverage of 0.15% to 0.2% of Earth's surface, all presumably constructed in the past ~100 years (post-automobile), while the global increase in CO 2 is a net 0.01% atmospheric concentration (or 0.04% total concentration). Si...
by paha arkkitehti
Tue Sep 13, 2016 7:04 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

Then we seem to be boned either way, as I'm not sure how you feed 7 billion of us on a zero-fossil-fuels economy. Or keep the ones who don't live in the tropics warm in the wintertime. (Or, generously, to do those things with an early-1800s-level-of-emissions-with-today's-tech, fossil-fuels-economy...
by paha arkkitehti
Mon Sep 12, 2016 5:17 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 532
Views: 82323

Re: 1732: "Earth Temperature Timeline"

I assume the point is that the hockey stick we see at the end is just the sort of variation that we are not able to identify in the historical records (as Randall points out) The "variations we can't see" picture is on the same scale as the overall plot; the hockey stick belongs clearly o...
by paha arkkitehti
Wed Feb 10, 2016 7:12 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 54328

Re: What-If 0145: "Fire From Moonlight"

Alright, did some thinking and yes, I was wrong. You can't use lenses to set things on fire using moonlight. But it's not because of thermodynamics, it's because of optics, just as Randall explained. You'd need photovoltaics or some similar energy conversion method in addition to optics to burn thin...
by paha arkkitehti
Wed Feb 10, 2016 5:11 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 54328

Re: What-If 0145: "Fire From Moonlight"

To more clearly understand why, take note of the fact that there is light flying around everywhere in the room at all times, bulb or not, most of it's just not visible. If lenses could do what we wanted here, you could set up some lenses to focus that light on one side of the room, making it hotter...
by paha arkkitehti
Wed Feb 10, 2016 4:20 pm UTC
Forum: What If?
Topic: What-If 0145: "Fire From Moonlight"
Replies: 157
Views: 54328

Re: What-If 0145: "Fire From Moonlight"

Yeah, this one was just wrong, and it's disappointing that Randall got it wrong with thermodynamics, of all things. The flaw in the answer is that the Laws of Thermodynamics only apply on closed systems. The sun-moon-lens-paper system isn't a closed one (in the classical sense), as there's a frikin'...
by paha arkkitehti
Thu Sep 18, 2014 7:22 am UTC
Forum: What If?
Topic: What-If 0112: "Balloon Car"
Replies: 31
Views: 8809

Re: What-If 0112: "Balloon Car"

Obvious solution is to use a wing shaped balloon. That way you get the safety factor and zero-speed flying cabability of buoyancy and the speed from the Ferrari.
by paha arkkitehti
Thu Feb 06, 2014 7:33 am UTC
Forum: What If?
Topic: What-if 0082: "Hitting a Comet"
Replies: 59
Views: 13834

Re: What-if 0082: "Hitting a Comet"

So the next question is how much did the length of year change because of Rosetta stealing Earth's momentum in the flybys?
by paha arkkitehti
Thu Jul 25, 2013 5:10 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

Prediction: Cuegan and co. will be swept out to the sea. While they continue floating around, they will join more and more flotsam into their raft and also rescue various groups of hill-people. They will eventually wash ashore on Chateau d'If with a whole floating village.
by paha arkkitehti
Wed Jul 24, 2013 6:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

Aren't yurts generally made out of felt? That isn't very waterproof... It wouldn't be terribly functional as a dwelling if it weren't waterproof. This isn't your local craft store felt we're talking about, this is thick stuff that has been pounded together out of natural wool which still contained ...
by paha arkkitehti
Wed Jul 24, 2013 10:06 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

The main difference is that the kids have gotten excited - the little-moving boy stood up and Mini-Bunny moved up to see better. The obscured woman behind the tallest Bangs Brother also moved closer. It appears that LaPetite has lashed something to the front of the "ship" - maybe somethin...
by paha arkkitehti
Mon Jul 01, 2013 10:40 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

ZoomanSP wrote:
Neil_Boekend wrote:
ZoomanSP wrote:
Spoiler:
Image

His arm is off!

It was a hard (and tasty) battle!


Just a flesh wound.
by paha arkkitehti
Sat Jun 29, 2013 11:41 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

Has anyone tried to work out if the axis of rotation and celestial pole are where they are supposed to be for the year 13291, or is there some unexplained tilting going on?
by paha arkkitehti
Fri Jun 28, 2013 9:36 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

Well, my previous question hasn't passed the moderatorial gauntlet yet, but with a little magic with autocad I managed to plot the "celestial axis" at somewhere around 39 degrees up from the bottom. I couldn't exactly match the One True Sky to available star charts, but it seems indeed tha...
by paha arkkitehti
Fri Jun 28, 2013 8:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1190: "Time"
Replies: 106446
Views: 40820197

Re: 1190: "Time"

I've been a timelurker ever since the beginning (though I've probably missed more than a few newpages), but decided to sign in now that things are getting interesting again (with all the action and astronomical speculation). I wanted to ask if anyone has done any calculations if the polar location m...

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