Search found 552 matches

by wumpus
Wed Dec 10, 2014 2:20 pm UTC
Forum: Computer Science
Topic: Working out encryption method
Replies: 4
Views: 3962

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: 11622

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: 9461

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: 5080

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: 4577

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: 9461

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: 9199

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: 2750

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: 3381
Views: 684724

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: 6756

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: 26459

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: 26459

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: 3830

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: 142299

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: 26459

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: 26459

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: 26459

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: 26459

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: 26459

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: 26459

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: 26459

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: 26459

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: 26459

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...
by wumpus
Thu Oct 30, 2014 4:20 pm UTC
Forum: News & Articles
Topic: Wave of anti-abortion bills advance in the states
Replies: 164
Views: 27881

Re: Wave of anti-abortion bills advance in the states

And if you remove the reproductive component, they have more if it, according to every religious anti-sex group ever. So obviously, the reproductive portion is generally a disincentive for sex. I can't help but think that if such groups insisted that the sky was blue I would have to step outside to...
by wumpus
Thu Oct 30, 2014 4:14 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 26459

Re: Flying cars and jet-powered batwing

Note for drones larger than a quadcopter is suitable, I would like to point out the Scorpion UAV (an early 1990s drone). [...] Wow, that's cool! Not sure how well it would work for a manned system or an attack system, though; the larger you scale something up, the worse problems you have with reall...
by wumpus
Thu Oct 30, 2014 12:13 am UTC
Forum: News & Articles
Topic: Gamergate
Replies: 700
Views: 142299

Re: Gamergate

KnightExemplar wrote:Video Games is even younger, being mainstream for less than 40.


In 1972, Atari dumbed down video games all it could to produce "PONG". I'd claim it was mainstream and more than 40 years ago.

Time flies.
by wumpus
Wed Oct 29, 2014 2:40 pm UTC
Forum: Science
Topic: Flying cars and jet-powered batwing
Replies: 110
Views: 26459

Re: Flying cars and jet-powered batwing

Note for drones larger than a quadcopter is suitable, I would like to point out the Scorpion UAV (an early 1990s drone). This was a joint project between Scaled Composites and a company called Freewing (out of business). High speed flight is handled exactly like an aircraft. Takeoff, landing, and lo...
by wumpus
Tue Oct 28, 2014 11:50 pm UTC
Forum: Fit Club
Topic: Continuing running beyond 5k
Replies: 15
Views: 10705

Re: Continuing running beyond 5k

Huzzzah! Are you wearing "real" running shoes? While there are those that push the "more or less barefoot" ideal, I noticed that a bit past once I got to your level, my achilles tendon would act up. Rest plus "basic running shoes" was the cure. Don't walk in them (until...
by wumpus
Fri Oct 24, 2014 9:46 pm UTC
Forum: Hardware
Topic: Request: Advice on Efficient Upgrades of ~5 y.o. PC
Replies: 9
Views: 7725

Re: Request: Advice on Efficient Upgrades of ~5 y.o. PC

Note: laggy, sputtery, and choppy look rather different depending on if it's the drive, the GPU, or the network. Laggy and sputtery sound like hard drive issues. Choppy (persistently slow framerate) is certainly GPU. Now is an ideal time for an SSD (there is a pricewar), especially if you can go 5 y...
by wumpus
Fri Oct 24, 2014 9:23 pm UTC
Forum: Hardware
Topic: Request: Advice on Efficient Upgrades of ~5 y.o. PC
Replies: 9
Views: 7725

Re: Request: Advice on Efficient Upgrades of ~5 y.o. PC

While the names (and specs) of motherboards may change, I'm fairly confident they will take PCI-e GPU cards (and be backward compatible with anything you would consider buying from newegg) and SATA[n]. DDR4 might be needed, and I'm fairly confident that the next motherboard will only take that gener...
by wumpus
Wed Oct 22, 2014 4:43 pm UTC
Forum: News & Articles
Topic: Police misbehavior thread
Replies: 6473
Views: 971332

Re: Police misbehavior thread

Actually, I suspect it defines "secret police." They are selling police badges (and cheaply too), what could possibly go wrong? A big question (for the locals) is just how many of the "cops" ever show up in that town? One thing that "cops" get is a much broader right t...
by wumpus
Wed Oct 22, 2014 4:14 pm UTC
Forum: News & Articles
Topic: Wave of anti-abortion bills advance in the states
Replies: 164
Views: 27881

Re: Wave of anti-abortion bills advance in the states

The problem with your narrative is that by the time resource scarcity is such that it causes war, it won't be worth warring for them. Distribution of emerging resources causes war historically - not exhaustion (coal, rubber, oil, iron, gold ...) Woah a lot of good topics but I'll stick with one for...
by wumpus
Wed Oct 22, 2014 3:58 pm UTC
Forum: Hardware
Topic: Android phone recommendation
Replies: 21
Views: 11411

Re: Android phone recommendation (a bit US specific)

Warning: the following is a bit US specific (not just trying to match phones with plans, but I doubt you could find the CMDA networks outside the USA). Note that while the MotoG with 4G and/or a microSD slot is a great phone, the original (8G, no microSD slot, CMDA) can be had *cheap* and with *no c...
by wumpus
Wed Oct 22, 2014 3:36 pm UTC
Forum: News & Articles
Topic: Ebola thread
Replies: 256
Views: 58196

Re: Ebola thread

A quick question. If a hospital can't contain Ebola, just how many infectious diseases are churning around the place? Personally, I'd sooner head to the NIH in Bethesda* (which has an Ebola patient) than Texas Health Presbyterian Hospital Dallas. FSM only knows what you will come down with (except, ...
by wumpus
Tue Oct 14, 2014 6:24 pm UTC
Forum: Hardware
Topic: Is it possible to add a socket to BGA motherboard?
Replies: 3
Views: 4428

Re: Is it possible to add a socket to BGA motherboard?

First, I'd guess that if you have to ask you probably don't have the soldering skills to solder onto a CPU/BGA motherboard (I've known someone who could, but I'm not sure if she could do it without a mini-IR oven). Second, you would have to make sure that the solder pattern of the socket matches the...
by wumpus
Wed Oct 01, 2014 3:28 pm UTC
Forum: Hardware
Topic: Crashy-ass computer... It's a mystery
Replies: 35
Views: 22222

Re: Crashy-ass computer... It's a mystery

One important rule of thumb I've developed is that if a problem migrates all over the system instead of letting you pin down where it is, it is probably related to power or grounding. It doesn't look like you've even begun to determine where the problem is (only guessing), so that doesn't help you ...
by wumpus
Sun Sep 28, 2014 5:38 pm UTC
Forum: General
Topic: Sleep-time holodeck experiences
Replies: 3381
Views: 684724

Re: What were your dreams last night?

Long night with a vivid dream. The two themes were some sort of long drive home during the night, and a long trip to get a pizza. Lots of pizza-based imagery. No idea what could possibly bring it up (no recent meals of pizza). The drive I could understand. The pizza bit was surreal. One of those lon...
by wumpus
Sat Sep 27, 2014 4:34 pm UTC
Forum: Fit Club
Topic: Running is bad?
Replies: 11
Views: 10867

Re: Running is bad?

The "badness" of running comes down to two things: Running injuries: Find a [long distance] running-specific forum and you will essentially find a forum specializing in repetitive-use injuries. Those just getting into may underestimate the importance of running shoes and just how specific ...
by wumpus
Fri Sep 26, 2014 2:09 pm UTC
Forum: Serious Business
Topic: Converting to Post Scarcity
Replies: 139
Views: 26389

Re: Converting to Post Scarcity

The human driver takes their life in their hands, and the survival is based on their own skill or incompetence, and we tend to mind less when someone's death is caused by their own incompetence rather than pure chance. As far as I know*, experienced pilots have roughly the same issues as non-pilots...
by wumpus
Wed Sep 24, 2014 12:53 am UTC
Forum: Serious Business
Topic: Converting to Post Scarcity
Replies: 139
Views: 26389

Re: Converting to Post Scarcity

It's not really low-level electronics. It's more boxes that snap on a DIN rail with a very clearly defined function. Like a relay that switches on if two voltages go over a setpoint, with two screws to set the set points and a dip switch to change from voltage to current-based signals. Internally, ...

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