Search found 529 matches

by wumpus
Sun Mar 22, 2015 3:38 pm UTC
Forum: Hardware
Topic: Laptop recommendations and questions
Replies: 4
Views: 5627

Re: Laptop recommendations and questions

xoticpc.com seems to come up a bunch in these discussions. What seems to work: MSI CX61 2PC-499: 15" 1366x768 monitor (a 1920x1080 is $200 more). MSI GP70 Leopard-010: 17" 1920x1080 monitor for $100 more (and an hour less of battery life). Price: with the recommended mSATA drive, the 17&qu...
by wumpus
Sun Mar 22, 2015 2:25 pm UTC
Forum: Hardware
Topic: AMD Carrizo, is it actually good?
Replies: 21
Views: 11729

Re: AMD Carrizo, is it actually good?

AMD announced [no idea of sales or even if they shipped] two high-efficiency, low-power server chips: the Opteron A1100 [8 ARM cores], and the Opteron X2580 [4 jaguar cores + HSA]. My assumption is that: - required bandwidth scales linearly with cores - Cache area shrinks with cores (making bandwidt...
by wumpus
Sat Mar 21, 2015 2:28 pm UTC
Forum: Hardware
Topic: AMD Carrizo, is it actually good?
Replies: 21
Views: 11729

Re: AMD Carrizo, is it actually good?

The FM3 socket compatibility with AMD's Zen x86 and Zen ARM strategy is a pretty neat advantage... one that only AMD can pull off. One other trick that AMD should be capable of pulling off would be adding HBM to FM3. HBM being the memory stacking technology in the soon-to-be released AMD 390x, and ...
by wumpus
Sat Feb 21, 2015 5:47 pm UTC
Forum: Books
Topic: Harry Potter and the Methods of Rationality
Replies: 1036
Views: 364875

Edict of Merlin (again).

First point: Does Harry's "included the casting directions in case the Ministry grader didn't believe that Harry knew it." violate the Edict of Merlin? Or would the casting directions be useless to anyone who hadn't been directly taught them? The Edict of Merlin only applies t...
by wumpus
Wed Feb 04, 2015 3:38 pm UTC
Forum: Books
Topic: Harry Potter and the Methods of Rationality
Replies: 1036
Views: 364875

Re: Harry Potter and the Methods of Rationality

"taking the results into account". Why would Quirrell bother to think the "account" would be worth more than zilch? Presumably his "incredible spell" is quite fake. I guess a better question is if he is really in condition to cast *any* [non-cantrip] magic at this point...
by wumpus
Mon Feb 02, 2015 6:28 pm UTC
Forum: Books
Topic: Harry Potter and the Methods of Rationality
Replies: 1036
Views: 364875

Re: Harry Potter and the Methods of Rationality

Spoilered: First point: Does Harry's "included the casting directions in case the Ministry grader didn't believe that Harry knew it." violate the Edict of Merlin? Or would the casting directions be useless to anyone who hadn't been directly taught them? Hermione's grade: Is...
by wumpus
Thu Jan 29, 2015 7:13 pm UTC
Forum: Hardware
Topic: New Desktop recommondations
Replies: 13
Views: 9786

Re: New Desktop recommondations

It's not particularly difficult. If you can put together a Lego kit, you can put together a PC. While that is no doubt true, it does not, however, follow that if one is capable of buying a Lego kit, one is also capable of buying a properly matched set of components to put together a PC by one's sel...
by wumpus
Wed Jan 28, 2015 5:07 pm UTC
Forum: School
Topic: Why was the axiomatic method never taught to me?
Replies: 12
Views: 9438

Re: Why was the axiomatic method never taught to me?

Gödel. From the sound of it, you [the OP] probably haven't run into Gödel yet (or at least just recently googled to find out what that means). Basically, axiomatic methods have been important in math roughly twice: First with non-Euclidian math proving that Euclid's axioms weren't the only possible...
by wumpus
Tue Jan 27, 2015 7:02 pm UTC
Forum: News & Articles
Topic: The Thread To Remind Me We're Living In The Future
Replies: 1773
Views: 268538

Re: The Thread To Remind Me We're Living In The Future

Re: Whizbang: Maybe not so much the future: I'm 'Enery the Eighth, I am, 'Enery the Eighth I am, I am! I got married to the widow next door, She's been married seven times before And every one was an 'Enery She wouldn't have a Willie nor a Sam I'm her eighth old man named 'Enery 'Enery the Eighth, I...
by wumpus
Fri Jan 23, 2015 9:10 pm UTC
Forum: Books
Topic: Worst/Overrated books.
Replies: 753
Views: 249067

Re: Worst/Overrated books.

Did I somehow miss a warning that Candide by Voltaire hasn't been highly rated for centuries? Back when I read it the whole book could be summed up in the (then popular) bumper sticker [spoilered for NSFW language and presumably spoilers] shit happens. Q: Good gods why? Why did it have to drag on li...
by wumpus
Thu Jan 22, 2015 5:05 pm UTC
Forum: Hardware
Topic: Lost space on external harddrive
Replies: 2
Views: 4037

Re: Lost space on external harddrive

First, your description is somewhat confusing. A harddrive pulled from a machine pre-loaded with windows likely to have a "reinstall" partition as well as a user partition. On the other hand, the reinstall partition is unlikely to be larger than half the user partition (all of it is expect...
by wumpus
Thu Jan 08, 2015 2:31 pm UTC
Forum: Hardware
Topic: Moore's law and star trek
Replies: 9
Views: 8266

Re: Moore's law and star trek

Yeah Dennard scaling was awesome. We can probably still get higher ghz numbers by switching to new materials. (Though I think that if you increase it by much lightspeed delays increasingly become a problem. (Much= 10X +) ) I was hearing around 2000 that wire delays were the real limit in CPU speed....
by wumpus
Fri Jan 02, 2015 4:43 pm UTC
Forum: Hardware
Topic: Moore's law and star trek
Replies: 9
Views: 8266

Reality check

In the 1960s (wiki says 1965) Gordon Moore observed that the amount of transistors you can cram on a chip doubled every 18 months (changed in the 1980s to two years, probably three years now). Basically, the "law" is based on photolithography, the process of developing transistors based on...
by wumpus
Mon Dec 15, 2014 2:45 am UTC
Forum: News & Articles
Topic: Police misbehavior thread
Replies: 6231
Views: 869616

Re: Police misbehavior thread

The County Executive of a Maryland county recently discussed his encounters with the police: http://www.washingtonpost.com/local/md-politics/montgomery-county-executive-recounts-his-own-police-profiling-incidents/2014/12/11/cc65aa28-80a8-11e4-81fd-8c4814dfa9d7_story.html One thing that got me about ...
by wumpus
Thu Dec 11, 2014 2:15 am UTC
Forum: Computer Science
Topic: Working out encryption method
Replies: 4
Views: 3834

Re: Working out encryption method

Ouch. Basically there are two ways to decrypt a file you don't have the password for: 1. Guess the password (with a dictionary attack like Jack the Ripper and some helpful hints from coworker). 2. Attack the implementation. Since it stores the password (somewhere) this should be possible. I'd really...
by wumpus
Wed Dec 10, 2014 2:30 pm UTC
Forum: Hardware
Topic: Summer 2015 Laptop / Desktop / Tablet Speculation
Replies: 4
Views: 6583

Re: Summer 2015 Laptop / Desktop / Tablet Speculation

I'm actually hearing that the 390x is going to be released at 28nm, due to complications at 20nm. Apparently, Apple bought out TSMC's entire 20m capacity on the iPhone6, so neither AMD nor NVidia get 20nm until Apple is done making iPhones. It sounds like NVidia will get the die-shrink to 16nm firs...
by wumpus
Wed Dec 10, 2014 2:24 pm UTC
Forum: Computer Science
Topic: You gain an oracle turing machine.
Replies: 19
Views: 9042

Re: You gain an oracle turing machine.

Right... Write a program that brute-forces an encryption key, or some other super long intractable problem. Then, if the first bit of the result is a 1, halt, otherwise loop forever. Obviously, that program would take a ridiculously long time to run if it does halt, and if it doesn't halt then that...
by wumpus
Wed Dec 10, 2014 2:20 pm UTC
Forum: Computer Science
Topic: Working out encryption method
Replies: 4
Views: 3834

Re: Working out encryption method

From the sound of it, you almost certainly shouldn't be writing this program (security is hard. You need to already know almost all the pitfalls already to not fall in them). On the other hand, if there isn't any else to do it... You never, never, keep the passwords in plaintext. You shouldn't even ...
by wumpus
Wed Dec 10, 2014 2:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1458: Small Moon
Replies: 61
Views: 11290

Re: 1458: Small Moon

I guess the Death Star would have noticeable gravity, certainly more than Comet 67P. Based on the diameter of 160km, ] Since wiki lists Deimos as having a diameter of 12.6km, you would have to reclassify most of the known moons at the time. A better question is "so where is the planet it is or...
by wumpus
Mon Dec 08, 2014 1:00 am UTC
Forum: Computer Science
Topic: You gain an oracle turing machine.
Replies: 19
Views: 9042

Re: You gain an oracle turing machine.

korona wrote:Use binary seach or "bucket search". This also enables you to search arbitrary mathematical proofs.


Looks like that will work, just put the oracle between outer and inner loops. Didn't think long enough on that one.
by wumpus
Sun Dec 07, 2014 6:12 pm UTC
Forum: Hardware
Topic: no high speed internet access
Replies: 3
Views: 4976

Re: no high speed internet access

Check to see how much that thing downloads (bug fixes, buying over the net, wholesale replacement of placeholder code with shipping code) and compare that to caps. This might be a problem. Of course if there aren't any charges for going over, you could just plug it in and find out (at the cost of yo...
by wumpus
Sun Dec 07, 2014 6:09 pm UTC
Forum: Computer Science
Topic: Calculus and Computer Science
Replies: 4
Views: 4450

Re: Calculus and Computer Science

Generally speaking, math is the language of the sciences. There are two issues here: 1. Getting by the gateway that colleges put freshmen through for a background for future study. 2. Actually doing AI. My guess is that any reasonably hard-science BS degree will require taking calculus, and then ple...
by wumpus
Sun Dec 07, 2014 5:55 pm UTC
Forum: Computer Science
Topic: You gain an oracle turing machine.
Replies: 19
Views: 9042

Re: You gain an oracle turing machine.

It depends on the type of oracle the machine includes. I suspect you mean a halting oracle though, which can solve the halting problem for any normal Turing machine in a short constant time. If I had a halting oracle the only safe course of action would be to destroy it, after solving a handful of ...
by wumpus
Sun Dec 07, 2014 5:48 pm UTC
Forum: Science
Topic: Oscilloscope Stray Signals
Replies: 36
Views: 8706

Re: Oscilloscope Stray Signals

Anyone know of a light-duty free compiler for Python? Python is interpreted rather than compiled (well, there is a compile step, but it's hidden from you). There are many free distributions. The simplest one is at http://www.python.org. Free distributions with more bells and whistles are available ...
by wumpus
Sat Dec 06, 2014 3:13 pm UTC
Forum: The Help Desk
Topic: Linux/Debian: 3TB hard drive limited to around 700GB
Replies: 3
Views: 2604

Re: Linux/Debian: 3TB hard drive limited to around 700GB

total 5860533168 sectors ... Device Boot Start End /dev/sdb1 63 1565565871 5860533168 -1565565871 The partition is not the whole disk. You'll have to resize it, which may or may not allow you to keep the data, depending on the filesystem format. If you can't resize the partition, you should be able...
by wumpus
Sat Dec 06, 2014 3:05 pm UTC
Forum: General
Topic: Sleep-time holodeck experiences
Replies: 3333
Views: 637503

Re: What were your dreams last night?

[Must have been Thursday night, might have missed an element]. ...Trying to sleep... (this is a weird element. I'm sure I get this one early at night when I am trying to sleep, but this is in the morning at the end of a good night's sleep) ...looking for the bathroom...outside...undressed...realizin...
by wumpus
Sun Nov 30, 2014 2:16 am UTC
Forum: Hardware
Topic: Summer 2015 Laptop / Desktop / Tablet Speculation
Replies: 4
Views: 6583

Re: Summer 2015 Laptop / Desktop / Tablet Speculation

First: shouldn't this be the Winter 2015 Laptop/Desktop/Tablet/fitwatch Speculation? On CPUs: Broadwell sounds interesting, but I have to wonder if Skylake will be the closest thing to "futureproof" for awhile. Not that Intel has been all that insistent on keeping exactly to the "tick...
by wumpus
Wed Nov 26, 2014 2:15 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

I note that my nearest metro(DC metro area) is much more fond of obfuscating numbers than showing true costs, and estimated future costs have historically been significantly underestimated. The DC metro was designed to be ridiculously expensive*. The claim was to not take any money away from all th...
by wumpus
Mon Nov 24, 2014 4:05 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

On cars vs. planes.

One thing to remember about mileage on a car vs. a plane is just how bad car engines are at delivering mileage. Typically, we think of cars as being efficient at lower speeds and such, but in reality that is simply the fact of air resistance. The engine itself runs most efficiently delivering about ...
by wumpus
Mon Nov 24, 2014 12:56 am UTC
Forum: News & Articles
Topic: "The XKCD Guide to the Universe’s Most Bizarre Physics"
Replies: 4
Views: 3586

Re: "The XKCD Guide to the Universe’s Most Bizarre Physics"

Odd. I had to switch to a browser with scripts turned off.

Also missing, higher dimensions of time. Whether on not they exist, they are easy to understand as alternatives histories/universes/etc.
by wumpus
Mon Nov 24, 2014 12:42 am UTC
Forum: News & Articles
Topic: Gamergate
Replies: 700
Views: 132366

Re: Gamergate

Some notes: In 2000 the US Department of Defense (presumably the Army) launched a video game called "America's Army". It was presumably designed as more of an recruitment aid over any idea of glorifying war, but due to later events it was likely expected to improve perceptions of wars in I...
by wumpus
Tue Nov 18, 2014 1:11 am UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

Isn't flying inherently much more energy-expensive than traveling by land? Like, literally the same energy cost at cruising speed except that one has to add the "keep the vehicle off the ground" term? My understanding is that you use roughly the same amount of fuel per-person in a commerc...
by wumpus
Sat Nov 15, 2014 6:08 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

This guy has the right idea: [i]"For me, it has to be vertical take-off and landing," said Daniel Lubrich, the managing director of Krossblade Aerospace Systems . "I think this idea of an aircraft you can drive on the street but you still have to find an airport for is nice, but it d...
by wumpus
Sat Nov 15, 2014 6:03 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

[police/emergency responder is] more "time is of the essence" than "money is no object". Well, then would you rather have six helicopters, ensuring that one of them is already near the problem, or one flying car that's on the other side of town (and maybe in the middle of anothe...
by wumpus
Fri Nov 14, 2014 2:35 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

Certainly, something like this would start out as a police/emergency responder sort of thing... Sounds good, but it's because that's a "money is no object" kind of application. And even so, money is an object. Is it better to have one flying car, or six ordinary police/emergency helicopte...
by wumpus
Fri Nov 14, 2014 12:23 am UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

Yes, parking is obviously going to be important. Another thing is how you sell enough to get a "flying car making startup" started up. I'd probably look at Elon Musk's decision that electric cars are going to be expensive for awhile, so try to compete with Porsche buyers instead of Prius b...
by wumpus
Thu Nov 13, 2014 2:37 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

Even if we forget about the car side of things, it's the "flying" bit that's important. To my knowledge, there is no manned VTOL craft capable of fitting into a garage. Anywhere. We need to rectify that. :) I really don't think that the horseless carriage had to fit in a horse's barn to r...
by wumpus
Tue Nov 04, 2014 10:54 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

You don't think that having unpowered fans in the wings will affect lift/handling in level flight? Not with the control louvers closed, no. The louvers will certainly increase induced drag during transition, but that's to be expected. Once transition is complete and they are closed, the fans are ae...
by wumpus
Tue Nov 04, 2014 9:18 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

Ok, while it still looks like an infinite sink of R&D funds (requiring entirely new technologies needed simply to make the explicitly require entire new technologies to work), it might be a bit more sane. I'm curious if anyone has done much in the way of pulling power from [jet]turbines like tha...
by wumpus
Tue Nov 04, 2014 3:30 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 25852

Re: Flying cars and jet-powered batwing

While I've heard you can make a brick fly with sufficient thrust, is it really necessary to propose such a craft with two separate engines with at least 111% thrust to weight ratio (after any losses due to angling the thrust >45 degrees), plus two additional "main engines" with [presumably...

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