Search found 2973 matches

by Eebster the Great
Tue Aug 07, 2018 9:47 pm UTC
Forum: Science
Topic: Formal definition of genetic fitness
Replies: 8
Views: 286

Re: Formal definition of genetic fitness

Perhaps "the abundance of that genotype" should only be tallied over those individuals that are still members of the species? Mules and others no longer capable of breeding with the original population are discounted. That doesn't catch the long term problems, but that's a case of 'curren...
by Eebster the Great
Tue Aug 07, 2018 7:41 am UTC
Forum: Science
Topic: Formal definition of genetic fitness
Replies: 8
Views: 286

Formal definition of genetic fitness

I've taken a number of college-level biology classes but never had the opportunity to take a proper statistical one that assumes an understanding of differential equations. So I've always wondered about the definition of fitness in relation to multigenerational effects. Wikipedia defines absolute fi...
by Eebster the Great
Tue Aug 07, 2018 5:24 am UTC
Forum: Fictional Science
Topic: Trying to construct an ideal future virtual society of dragons
Replies: 18
Views: 771

Re: Trying to construct an ideal future virtual society of dragons

You mean, like, restructuring the universe so that it was fair all along? Bringing people back to life isn't fair either. You can't make up for past suffering by future reward like that.
by Eebster the Great
Tue Aug 07, 2018 12:23 am UTC
Forum: Fictional Science
Topic: Trying to construct an ideal future virtual society of dragons
Replies: 18
Views: 771

Re: Trying to construct an ideal future virtual society of dragons

Resurrecting nobody is completely fair.
by Eebster the Great
Tue Aug 07, 2018 12:10 am UTC
Forum: Fictional Science
Topic: Why do starship captains say "you've got x/4 hours" when the engineers ask for x?
Replies: 10
Views: 500

Re: Why do starship captains say "you've got x/4 hours" when the engineers ask for x?

The plot reason is usually that there is no more time available. Essentially, at that point in the episode, the ship is usually under attack or getting sucked into a black hole or about to explode or something, so Scotty literally must fix the engine in the remaining time or die. The plot reason for...
by Eebster the Great
Tue Aug 07, 2018 12:00 am UTC
Forum: Fictional Science
Topic: Trying to construct an ideal future virtual society of dragons
Replies: 18
Views: 771

Re: Trying to construct an ideal future virtual society of dragons

The idea that one should reject "equality" as a norm because a hyperfuture time-travel-computing civilization that blindly resurrects every human that ever lived in a naive attempt at equality-across-time would have some bad consequences is so far into non-sequitur territory I don't think...
by Eebster the Great
Thu Aug 02, 2018 1:32 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2870
Views: 633068

Re: Miscellaneous Science Questions

Fair enough. The circumference at the equator of an NFL football is about 22 inches apparently, so if we model it as a right circular cone, its cross-sectional area is about 250 cm 2 . I'll accept the drag coefficient values, and I'll give Uncle Rico the benefit of the doubt and assume he has a perf...
by Eebster the Great
Wed Aug 01, 2018 4:47 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2870
Views: 633068

Re: Miscellaneous Science Questions

The most important parameters are the distance to them mountains and the height of them mountains. The others have only minor significance. You also can't really do anything with just density of air and coefficient of drag, but at the end of the day, drag isn't worth worrying about anyway, because y...
by Eebster the Great
Mon Jul 30, 2018 7:06 am UTC
Forum: Fictional Science
Topic: The theory of everything shouldn't exist
Replies: 11
Views: 639

Re: The theory of everything shouldn't exist

I mean look at the 3rd dimension as a cube. then the 2nd dimension is a square. then the 1st a dot. but a dots a really small circle. not a square. again x = 1 doesn't make sense how did we get 1? Ist dimension is more of a point then a physical dot. Really you wouldn't be able to see it. We juay d...
by Eebster the Great
Mon Jul 23, 2018 2:08 am UTC
Forum: Language/Linguistics
Topic: Language fleeting thoughts
Replies: 100
Views: 21752

Re: Language fleeting thoughts

I got that, I was just commenting on the seeming recursive nature of celebrating a celebration.
by Eebster the Great
Sun Jul 22, 2018 4:10 pm UTC
Forum: Language/Linguistics
Topic: Language fleeting thoughts
Replies: 100
Views: 21752

Re: Language fleeting thoughts

Reading the article, it sounds like la Fête de la Fédération in 1790 itself was commemorating the storming of the Bastille, which makes 14 juillet a celebration of a celebration of the event, a "Bastille Day Day."
by Eebster the Great
Mon Jul 16, 2018 8:23 pm UTC
Forum: Science
Topic: Consequences of climate change
Replies: 70
Views: 10348

Re: Consequences of climate change

The main cause of sea level rise currently is thermal expansion from global warming. But I imagine at some point, sea level rise (flux) due to melting and calving of glaciers and ice sheets will be greater. Does anyone know when that would happen? Checking with the IPCC page: Factors Contributing t...
by Eebster the Great
Mon Jul 16, 2018 4:12 am UTC
Forum: Science
Topic: Consequences of climate change
Replies: 70
Views: 10348

Re: Consequences of climate change

The main cause of sea level rise currently is thermal expansion from global warming. But I imagine at some point, sea level rise (flux) due to melting and calving of glaciers and ice sheets will be greater. Does anyone know when that would happen?
by Eebster the Great
Mon Jul 16, 2018 2:06 am UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 1714

Re: Cooling gas by expansion

Sterile neutrinos would be the stealthiest possible exhaust. But there is no known way even to convert a significant amount of energy into regular neutrino radiation. Anyway, that's pretty far off topic.
by Eebster the Great
Tue Jul 03, 2018 9:08 pm UTC
Forum: Science
Topic: [Physics] Going over like a lead balloon
Replies: 2
Views: 481

Re: [Physics] Going over like a lead balloon

It's season 6, episode 2. Lead is one of the worst possible materials not only because of its density but also its softness and lack of rigidity. There is no difference between a lead balloon and any other except that the lead balloon must be very thin in order to float, and thin lead ribs are liabl...
by Eebster the Great
Tue Jul 03, 2018 4:23 am UTC
Forum: Language/Linguistics
Topic: Oxford comma query
Replies: 26
Views: 5291

Re: Oxford comma query

gmalivuk wrote:You mean the em-dash?

I can't remember. I think I meant the en dash, since distinguishing it from an em dash would be as important in the disambiguating game as from a comma. It wasn't a serious suggestion.
by Eebster the Great
Mon Jul 02, 2018 3:40 pm UTC
Forum: Language/Linguistics
Topic: Oxford comma query
Replies: 26
Views: 5291

Re: Oxford comma query

Or maybe it's time to upgrade the en dash from relative obscurity to doing some roles of the overloaded comma, making all these sentences unambiguous.
by Eebster the Great
Sun Jul 01, 2018 4:47 am UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 1714

Re: Cooling gas by expansion

Reionization is an insoluble problem with this approach to stealth as far as I can see. Instead of a rocket, you now have a comet.
by Eebster the Great
Tue Jun 26, 2018 5:59 pm UTC
Forum: Language/Linguistics
Topic: Oxford comma query
Replies: 26
Views: 5291

Re: Oxford comma query

My best theory at this point is that he made a mistake or doesn't fully understand how commas work.
by Eebster the Great
Mon Jun 25, 2018 7:16 pm UTC
Forum: Language/Linguistics
Topic: "Cactus plant"
Replies: 18
Views: 2334

Re: "Cactus plant"

Bloopy wrote:
ThirdParty wrote:A "cactus plant" is a cactus that won't die if you keep it in a flowerpot.

I've seen some in flowerpots which certainly looked dead!

Maybe those were cactus shrubs, not cactus plants!
by Eebster the Great
Sun Jun 24, 2018 2:24 am UTC
Forum: Fictional Science
Topic: Trying to develop a hard sci fi magick system
Replies: 12
Views: 2561

Re: Trying to develop a hard sci fi magick system

If players in the game have the roles of the "demons" manipulating time or whatever through magic (I didn't really understand your explanation of how that works or why your spell magic that way), that could be interesting. You could have a "block time" view, where you see the ful...
by Eebster the Great
Fri Jun 22, 2018 4:20 am UTC
Forum: Mathematics
Topic: Repetitive Coin Flip Probability
Replies: 16
Views: 1879

Re: Repetitive Coin Flip Probability

We can calculate the probability using generating functions. Let p be the probability that the coin is flipped over on a given day. (In the opening post, this is p = .05 for the first problem and p = .95 for the second problem.) Then, the probability that the coin is flipped exactly k times across ...
by Eebster the Great
Thu Jun 21, 2018 12:55 pm UTC
Forum: Mathematics
Topic: Repetitive Coin Flip Probability
Replies: 16
Views: 1879

Re: Repetitive Coin Flip Probability

Seems like that kind of bias would have to be in the method of flipping rather than the coin itself.
by Eebster the Great
Thu Jun 21, 2018 12:35 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1998: "GDPR"
Replies: 61
Views: 6747

Re: 1998: "GDPR"

As long as anyone has her number in their contacts list and also has their contacts linked to facebook, facebook can figure it out. Most likely, a lot of her friends did that.
by Eebster the Great
Thu Jun 21, 2018 4:29 am UTC
Forum: Mathematics
Topic: Repetitive Coin Flip Probability
Replies: 16
Views: 1879

Re: Repetitive Coin Flip Probability

A coin that is extremely asymmetrical could easily have a bias toward heads or tails. The normal process of flipping real coins tends to make them pretty resistant to those sorts of biases, but not completely so.
by Eebster the Great
Wed Jun 20, 2018 8:27 pm UTC
Forum: Mathematics
Topic: Repetitive Coin Flip Probability
Replies: 16
Views: 1879

Re: Repetitive Coin Flip Probability

It looks like I overlooked a definition in my original post. For the purposes of this setting, a flip is not flipping the coin to a random side, but is turning the coin over, so that a heads becomes a tails, and a tails becomes a heads. I will be updating my original post to reflect this. It looks ...
by Eebster the Great
Wed Jun 20, 2018 2:42 pm UTC
Forum: Mathematics
Topic: Repetitive Coin Flip Probability
Replies: 16
Views: 1879

Re: Repetitive Coin Flip Probability

Let p be the probability of flipping the coin in a given day and d be the number of days. Let n be the number of times the coin has flipped. So for instance, in scenario one (p=0.05, d=20), there is a 0.05 20 probability of zero flips the whole vacation, i.e. P(n=0) = 0.05 20 . Similarly, P(n=1) = 2...
by Eebster the Great
Tue Jun 19, 2018 6:33 pm UTC
Forum: Fictional Science
Topic: Airlock full of water exposed to vacuum
Replies: 10
Views: 2312

Re: Airlock full of water exposed to vacuum

It seems unlikely that not only would humans evolve in a parallel universe with significantly different laws of physics, but that the exact same people would live in a virtually identical society except for a few very subtle differences regarding employment decisions and the like. Though maybe that ...
by Eebster the Great
Mon Jun 18, 2018 3:29 pm UTC
Forum: Language/Linguistics
Topic: "Cactus plant"
Replies: 18
Views: 2334

Re: "Cactus plant"

Has anyone else seen this apparently redundant phrase? To me, a cactus is a type of succulent, specifically a desert plant, and I assumed these were known almost everywhere. The phrase "cactus plant" seems as silly as "dog animal" or "mushroom fungus." But I've seen th...
by Eebster the Great
Sun Jun 17, 2018 5:15 pm UTC
Forum: Language/Linguistics
Topic: "Cactus plant"
Replies: 18
Views: 2334

Re: "Cactus plant"

Some Googling definitely supports the usage of "cactus plant" as commonly used for houseplants exclusively, as opposed to wild cactus or even to cacti grown in gardens. I'm not sure why, but there are plenty of home & garden stores and the like using the term.
by Eebster the Great
Thu Jun 14, 2018 7:28 am UTC
Forum: Language/Linguistics
Topic: "Cactus plant"
Replies: 18
Views: 2334

Re: "Cactus plant"

So the idea might be to treat "cactus" as a mass noun (e.g. field of cactus, cactus fruit) and thus "cactus plant" as a count noun? I guess that would make sense, though I can't say I've seen that really. I guess it depends on the plant. For instance, one might hear "rose bu...
by Eebster the Great
Thu Jun 14, 2018 12:36 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 82188

Re: Science-based what-if questions

It depends on if you paint hinges and on which direction you paint the latch.
by Eebster the Great
Wed Jun 13, 2018 12:24 pm UTC
Forum: Language/Linguistics
Topic: "Cactus plant"
Replies: 18
Views: 2334

"Cactus plant"

Has anyone else seen this apparently redundant phrase? To me, a cactus is a type of succulent, specifically a desert plant, and I assumed these were known almost everywhere. The phrase "cactus plant" seems as silly as "dog animal" or "mushroom fungus." But I've seen the...
by Eebster the Great
Fri Jun 08, 2018 5:54 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 82188

Re: Science-based what-if questions

You can find the magnitude of acceleration with Torricelli's equation , which does not include time as a variable: a = ( v f 2 - v i 2 )/(2 ∆ x ) Where a is the magnitude of average acceleration, v i is the initial speed (350 m/s), v f is the final speed (0 m/s), and ∆ x is the magnitude of displace...
by Eebster the Great
Thu Jun 07, 2018 8:37 am UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 559
Views: 78704

Re: Miscellaneous language questions

I hear CDs are gonna replace casettes soon. That was done for some of the coolest languages; but French is still learned using cassettes. I mean, "cassette" is a French word, while "CD" is merely almost French (le CD = le disque compact, I guess in the same way SI = internationa...
by Eebster the Great
Wed Jun 06, 2018 9:06 am UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 559
Views: 78704

Re: Miscellaneous language questions

I hear CDs are gonna replace casettes soon.
by Eebster the Great
Wed Jun 06, 2018 6:34 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2001: "Clickbait-Corrected p-Value"
Replies: 15
Views: 2674

Re: 2001: "Clickbait-Corrected p-Value"

Yeah, not "almost every" in the technical sense, but in the sense that there are so many clickbait headlines that a subjectively large majority of them will have results greater than 1. Consider the example in the comic. It is not necessary that any actual article be published about anythi...
by Eebster the Great
Wed Jun 06, 2018 1:52 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2002: "LeBron James and Stephen Curry"
Replies: 43
Views: 4459

Re: 2002: "LeBron James and Stephen Curry"

Yeah, magnetic north is just a local direction. He didn't say anything about the actual magnetic north pole on the Earth. I imagined it having something to do with a magnet hidden in the ball to make it shoot straighter or something.
by Eebster the Great
Mon Jun 04, 2018 7:02 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2002: "LeBron James and Stephen Curry"
Replies: 43
Views: 4459

Re: 2002: "LeBron James and Stephen Curry"

In the U.S., SSNs are primarily used for taxes and employment. People who do not participate in social security (mostly aliens required to pay federal taxes, but also Amish and Mennonites) have individual taxpayer ID numbers with the same function. Because these are unique to each person and never c...
by Eebster the Great
Mon Jun 04, 2018 5:07 pm UTC
Forum: Fictional Science
Topic: Most creative way to manipulate boundary
Replies: 11
Views: 2285

Re: Most creative way to manipulate boundary

Soupspoon wrote:"towcestest"

What do toasters have to do with this?

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