Search found 5293 matches

by Xanthir
Thu Dec 15, 2016 9:56 pm UTC
Forum: Science
Topic: How to reason about the force, pressure or impulse to break something?
Replies: 12
Views: 4901

Re: How to reason about the force, pressure or impulse to break something?

Yes, that's basically what Soupspoon said.
by Xanthir
Tue Dec 13, 2016 9:24 pm UTC
Forum: Gaming
Topic: 80 Days
Replies: 3
Views: 1929

Re: 80 Days

I need to play it some more, as I've really enjoyed it as well. I think I've only done 2 trips? It's so great just gliding thru it and seeing what happens, when suddenly you're successfully executing a mutiny and shaving a ton of time off your trip by sending the ship straight to where you want it.
by Xanthir
Tue Dec 13, 2016 9:15 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9742
Views: 1554199

Re: Coding: Fleeting Thoughts

Javascript's Date, in particular, is a near-exact copy of Java's Date, with all the terrible mistakes that implies. Side-effect of its initial design being done in 10 days and needing a date object from the very beginning.
by Xanthir
Fri Dec 02, 2016 10:12 pm UTC
Forum: Mathematics
Topic: Patient Probability Problem
Replies: 7
Views: 1902

Re: Patient Probability Problem

I'll disagree with you there - a million simulation trials, conducted naively, only takes a second or so, and is really easy to code. Figuring out the algebra can be a lot more difficult, and depending on how the math turns out and how naively it's coded, might end up doing silly things like generat...
by Xanthir
Fri Dec 02, 2016 10:09 pm UTC
Forum: Mathematics
Topic: Misunderstanding basic math concepts, help please?
Replies: 338
Views: 50655

Re: Misunderstanding basic math concepts, help please?

I mean, in the sense that everything *can* be modeled as a logical system, sure. You're not, like, actually *doing* axiomatic math in those cases, tho. Birds certainly aren't.
by Xanthir
Fri Dec 02, 2016 9:22 pm UTC
Forum: Mathematics
Topic: Misunderstanding basic math concepts, help please?
Replies: 338
Views: 50655

Re: Misunderstanding basic math concepts, help please?

Well, you've got the intuitive mathematics that people and many animals can do on their own. It's basically just small-number addition plus some statistics that only works for relatively large probabilities and short timescales.
by Xanthir
Fri Dec 02, 2016 9:20 pm UTC
Forum: Mathematics
Topic: Patient Probability Problem
Replies: 7
Views: 1902

Re: Patient Probability Problem

It sounds like there's a third "no change" outcome to the test? Otherwise the answer to the third question is trivial; 100% chance they're alive if N is less than X, 0% chance if N is greater than or equal to X. Are D and S out of the same interval, or separate? That is, is the math that (...
by Xanthir
Fri Dec 02, 2016 9:12 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2853
Views: 561087

Re: RELATIVITY QUESTIONS! (and other common queries)

Also the conversation topic is literally about quantum effects (the virtual-particle sea comes from quantum mechanics), so trying to use a pre-quantum understanding of EM to intuit behavior has a good chance of leading you wrong. (Note: I don't actually understand EM at that level either, but I have...
by Xanthir
Wed Nov 30, 2016 10:34 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2853
Views: 561087

Re: RELATIVITY QUESTIONS! (and other common queries)

How is the magnetic field not photons? What does photon mean to you? For me, a photon is a little shortcut for talking about the particle-ish behavior in QED, but not so important. Light and magnetism are both just shades of QED. If you want to split out the radiative term in a propogating field as...
by Xanthir
Tue Nov 29, 2016 11:50 pm UTC
Forum: Mathematics
Topic: Three externally tangent circles sharing a single point of tangency
Replies: 19
Views: 4047

Re: Three externally tangent circles sharing a single point of tangency

I agree in general (both circles are valid), but if I draw a circle around myself on the ground and ask you where its center is, you're naturally going to point to my feet, not gesture vaguely to the opposite side of the world. The fact that some use-cases have different notions of "natural&quo...
by Xanthir
Tue Nov 29, 2016 6:35 pm UTC
Forum: Mathematics
Topic: Three externally tangent circles sharing a single point of tangency
Replies: 19
Views: 4047

Re: Three externally tangent circles sharing a single point of tangency

A great circle is no different than any other circle - a given circumference divides the sphere into two circles, with centers on opposite sides of the sphere. The only distinction is that a great circle doesn't have as many ways to define a "natural" circle to associate with the circumfer...
by Xanthir
Tue Nov 29, 2016 5:48 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2853
Views: 561087

Re: RELATIVITY QUESTIONS! (and other common queries)

Yeah, precisely that. A single photon acts wave-like if you poke it the right way. An EM wave acts like a single "particle" of energy if you poke it the right way. Both are just interpretations of EM field excitations that can be useful for thinking about energy in different situations, bu...
by Xanthir
Mon Nov 28, 2016 10:38 pm UTC
Forum: Gaming
Topic: Pokemon Go
Replies: 117
Views: 18403

Re: Pokemon Go

Yeah, I've been quite happy with the new tracker. I won't usually run out of my way to catch something, but sometimes I do!
by Xanthir
Mon Nov 28, 2016 9:54 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2853
Views: 561087

Re: RELATIVITY QUESTIONS! (and other common queries)

Light is literally an EM wave. Magnetism is transmitted by photons. If photons are very slightly slowed down from c by virtual particles, then "magnetic force" is too, because it's literally photons.
by Xanthir
Fri Nov 18, 2016 11:19 pm UTC
Forum: Mathematics
Topic: 3 Statistics Questions
Replies: 3
Views: 2015

Re: 3 Statistics Questions

For #3, they're saying that the ratio changed, but the actual number of men with fertility problems in p2 didn't change; it's exactly the same as p1. So the question is, what # of women with fertility problems in p2 do you need so that you get the right right ratio but have the same # of men? Then, ...
by Xanthir
Tue Nov 08, 2016 3:20 am UTC
Forum: Mathematics
Topic: Problem with probability of students' scores
Replies: 4
Views: 1896

Re: Problem with probability of students' scores

Agree with lorb, a chi-squared should do you right.
by Xanthir
Sun Nov 06, 2016 10:41 pm UTC
Forum: Gaming
Topic: Kickstarter Thread. Everything Goes Here.
Replies: 422
Views: 140282

Re: Kickstarter Thread. Everything Goes Here.

Two sweet recent projects I backed:

The Game Anywhere Table - sweet fold-up gaming table, with all the separator/etc bits magnetic so they stay in place.

JazzNESs: A Nintendo Classic Jazz Tribute - Jazz versions of a bunch of classic NES songs (finally, a Music project for my pie-chart!)
by Xanthir
Sat Nov 05, 2016 2:56 am UTC
Forum: Gaming
Topic: Dungeons and Dragons Math (5th edition)
Replies: 23
Views: 5011

Re: Dungeons and Dragons Math (5th edition)

Chargen is also the time when you are *actively looking at tables*, so just looking up the bonus is barely noticeable in all the other table-lookups you're performing. One of the issues D&D faces is one of power-creep - 20 years ago, when I started playing (2nd Edition AD&D), character gener...
by Xanthir
Fri Nov 04, 2016 7:26 pm UTC
Forum: Gaming
Topic: Dungeons and Dragons Math (5th edition)
Replies: 23
Views: 5011

Re: Dungeons and Dragons Math (5th edition)

No one actually gets proficiency in strength checks by default do they? Strength saves yes, but the actual checks I presume you'd need a feat or special class ability (if it even exists) to get. No, when we're talking about "strength proficiency" or what have you, we mean proficiency in s...
by Xanthir
Thu Nov 03, 2016 9:51 pm UTC
Forum: Gaming
Topic: Dungeons and Dragons Math (5th edition)
Replies: 23
Views: 5011

Re: Dungeons and Dragons Math (5th edition)

I don't get why they stuck with the clunky ability score bonus formula, though. (Ability Score - 10) / 2 -- rounded down? Why not just half your Ability Score, rounded down? No more negative ability bonuses; on top of that, it's much easier to calculate ability bonuses on the fly. Sure, it means ad...
by Xanthir
Wed Nov 02, 2016 5:37 pm UTC
Forum: Religious Wars
Topic: Pi vs Tau
Replies: 19
Views: 5954

Re: Pi vs Tau

*in areas where the latin alphabet is the default. Π often loses its curves after the person gets familiar with one dash + two legs, whereas τ must keep its curved leg to tell it apart from T. That's not relevant for it's use in mathematics, where we always use the lowercase letters. Lowercase τ do...
by Xanthir
Wed Nov 02, 2016 5:12 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

I'm still having v easy time with conquests, on King difficulty. Combat AI is apparently still too hard.
by Xanthir
Sun Oct 30, 2016 4:42 am UTC
Forum: Science
Topic: Weakening evidence for dark energy
Replies: 12
Views: 2826

Re: Weakening evidence for dark energy

doogly wrote:Double false! The claims in the paper were not so legit, but we aren't likely to head for a rip even with the currently understood acceleration.

IIRC, we're currently theorized to be headed for the Big Freeze (infinite expansion, but not at an infinitely accelerating rate), right?
by Xanthir
Fri Oct 28, 2016 11:00 pm UTC
Forum: Computer Science
Topic: Encryption for the Lich Queen's spys?
Replies: 15
Views: 6028

Re: Encryption for the Lich Queen's spys?

I'll leave it to you to look up the details, but Cryptonomicon describes a pretty decent encryption algorithm implemented with modular addition and a pack of cards. It does require some form of coordination to allow the sender and receiver to agree on the deck setup before starting; in the book, it'...
by Xanthir
Fri Oct 28, 2016 12:35 am UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

Yeah, I've definitely accidentally skipped attacking sieging units with the city defenses before, because it doesn't show up in the "next thing to do" rotation. And the loss of an "Alert" action is keenly felt at times for similar reasons.
by Xanthir
Thu Oct 27, 2016 9:35 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

Since my first Prince game was super easy (accidental culture victory in 1910?!?), I turned off culture victory and went up to King for this game. WOOF, that's a noticeable difficulty curve. I'm holding my own as a middling power, but my neighbors on my continent are all better than me. I finally go...
by Xanthir
Thu Oct 27, 2016 12:10 am UTC
Forum: Fictional Science
Topic: Fiction Idea: Breaking out of the simulation
Replies: 12
Views: 4815

Re: Fiction Idea: Breaking out of the simulation

Already described in the OP: print a robot body, run the character's mind on it, feeding them input from the robot's sensors.
by Xanthir
Thu Oct 27, 2016 12:06 am UTC
Forum: Mathematics
Topic: Three externally tangent circles sharing a single point of tangency
Replies: 19
Views: 4047

Re: Three externally tangent circles sharing a single point of tangency

Why, that's hardly a circle at all then.
by Xanthir
Thu Oct 27, 2016 12:00 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9742
Views: 1554199

Re: Coding: Fleeting Thoughts

This is also why, the *moment* I start getting confused, I print something to verify that execution is actually running thru the code I'm writing. This instinct has saved me hours of debugging time. I often do it even before I start getting confused, just to make sure I'm looking at the right code i...
by Xanthir
Wed Oct 26, 2016 11:53 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

The magic of "luxuries get automatically spread out to your cities as needed" and the non-obvious sources of amenities still have me a little hinky. I get around it by just putting in some entertainment districts, but still don't really know how things work there. (In general, there's seve...
by Xanthir
Mon Oct 24, 2016 10:41 pm UTC
Forum: Gaming
Topic: Nintendo Topic
Replies: 56
Views: 13020

Re: Nintendo Topic

No, capitalism guilt-washes the items as long as all the people-you-know in the ownership chain tracing back from you weren't aware of the stolen nature of the goods.
by Xanthir
Mon Oct 24, 2016 10:36 pm UTC
Forum: Mathematics
Topic: Primes under different moduli
Replies: 4
Views: 1869

Re: Primes under different moduli

Yeah, each one decreases the number of candidates to check by 1/n, where n is the prime you're adding - adding 5 reduces by 1/5th, adding 7 reduces by 1/7th, etc. I used the 2*3*5 wheel back when I was working with primes for Project Euler, but I didn't do any real tests to see if a larger wheel wou...
by Xanthir
Fri Oct 21, 2016 7:54 pm UTC
Forum: Science
Topic: Has any other species ever rendered another extinct?
Replies: 5
Views: 2118

Re: Has any other species ever rendered another extinct?

For a big example, there was the changeover from a reducing atmosphere to an oxygen atmosphere, caused by the rise of blue-green algae, which caused the extinction of most other life on earth at the time. There's probably several other examples of "species A changes the environment in some sign...
by Xanthir
Wed Oct 19, 2016 12:18 am UTC
Forum: Mathematics
Topic: 1 is Not Prime
Replies: 17
Views: 3882

Re: 1 is Not Prime

None of that made a lick of sense. I'll repeat myself from before: "Prime" isn't a natural quality that we can just recognize in the universe, it's a definition we created to label a particular subset of the integers that have some useful properties. And it so happens that, for most purpos...
by Xanthir
Mon Oct 17, 2016 5:17 am UTC
Forum: Gaming
Topic: Nintendo Topic
Replies: 56
Views: 13020

Re: Nintendo Topic

And then also take the Sega route of developing for the other consoles; then we'll get Splatoon VR on the PlayStation. <3 On that note, I spent last night playing Splatoon, first time in a while. Still such a great game, and my skills are pretty decent now (I'm almost always the top-performer on my ...
by Xanthir
Sat Oct 15, 2016 6:13 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 413
Views: 36001

Re: Science-based what-if questions

gmalivuk wrote:If you put it in one place, the damage will be extreme but localized.


And not even *that* extreme. Assuming p1t1o's math was correct, 10kg of antimatter, fully annihilating, will only deliver 430MT. Larger than any bomb ever detonated, but still just a city-flattener.
by Xanthir
Sat Oct 15, 2016 5:58 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

So you played Civ 2 two decades ago and aren't familiar with the mechanics and improvements of 3, 4, 5, or the upcoming 6, don't understand the level of abstraction/metaphor that Civ employs, and prefer games with an actual battle-simulation focus. Cool, but none of that has anything to do with Civ ...
by Xanthir
Fri Oct 14, 2016 8:45 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

Prefers Civilization 5's diplomacy over 4's. Revolved heavily around religion in 4. Defined relationships more than anything. Acknowledges 5's warmongering penalty issues. (Hates you for every city you capture. Applies even in wars you did not start. Becomes a pariah after completely conquering one...
by Xanthir
Fri Oct 14, 2016 8:40 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

Minimum ten miles to a side? That's "at least all of modern Leeds" to a map square. London's 30 miles wide now , sure. If you zoom in on Leeds , you can see towns that pre-date the city. Anywhere ending in "ley" is named for a waterside pasture. Zoom far enough in and yo...
by Xanthir
Thu Oct 13, 2016 8:31 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 587
Views: 66804

Re: Gaming fleeting thoughts

I would have thought siege towers and battering rams were the less stackable units. Archers can huddle pretty close together to get through a canyon or something, and swap places back and forth to increase the rate of shooting from the same length of wall, but a ram has a pretty fixed footprint. A ...

Go to advanced search