Search found 469 matches

by Tub
Thu May 08, 2014 4:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1365: "Inflation"
Replies: 56
Views: 28481

Re: 1365: "Inflation"

Ok, hold on. When the universe was "this big" (size of a basketball), there was no CMBR yet. The universe got larger than a basketball in the first split seconds, the CMBR wasn't emitted until ~380.000 years later. Scientific inaccuracies for the joke, or did I miss something?
by Tub
Thu May 08, 2014 7:17 am UTC
Forum: Computer Science
Topic: Why is a good Wifi password necessary?
Replies: 16
Views: 9909

Re: Why is a good Wifi password necessary?

Whoa, that arbitrary code thing is awesome! The SNES is the best console ever, no question. They've found similar bugs on Pokemon , Super Mario 3 and Super Metroid , though the latter two movies just execute some small code that says "finish the game and show the credits", nothing elabora...
by Tub
Sun May 04, 2014 10:01 am UTC
Forum: Computer Science
Topic: Why is a good Wifi password necessary?
Replies: 16
Views: 9909

Re: Why is a good Wifi password necessary?

A router does that? I had no idea. So even if my desktop were completely compromised, they wouldn't be able to get access to my files and such on my laptop? A router (or rather the NAT running on your router) blocks incoming connections to your computers. So if you're running a game server on your ...
by Tub
Sat Apr 26, 2014 6:14 pm UTC
Forum: Computer Science
Topic: Why is a good Wifi password necessary?
Replies: 16
Views: 9909

Re: Why is a good Wifi password necessary?

What do you mean by "full access" to my computer? Depends on the service/game that's running, the user account the game is running from and the nature of the security vulnerability in said service. Worst case, the game server can be tricked into executing arbitrary code, so the attacker c...
by Tub
Fri Apr 25, 2014 10:38 am UTC
Forum: Computer Science
Topic: Why is a good Wifi password necessary?
Replies: 16
Views: 9909

Re: Why is a good Wifi password necessary?

Okay, that's actually not so scary. Pretty much the only things I use that have specific Firewall settings whatsoever are games. After breaking into your wifi, they can connect directly to your computers, printers and anything else on your local network. For anyone else on the internet, incoming co...
by Tub
Sat Mar 22, 2014 2:39 pm UTC
Forum: Computer Science
Topic: Distance minimization problem
Replies: 4
Views: 4359

Re: Distance minimization problem

I don't see any relation to the TSP; mostly I don't see a trivial way to reduce TSP to the problem at hand. It's certainly in NP, but I'm not sure if it's NP-hard. If you knew what homeowners needed what, ahead of time, you could do better than O(n!) easily. But we do know. Barring any information a...
by Tub
Wed Feb 26, 2014 9:35 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1335: "Now"
Replies: 131
Views: 63334

Re: 1335: "Now"

IANAWD but wouldn't this be easier / better with html5? The inner image could be rotated continuously and precisely, and you could even have several layers to deal with daylight savings. Or is there something bad about canvas elements? Nothing bad, there's just this one unreasonably popular browser...
by Tub
Sat Feb 15, 2014 11:05 am UTC
Forum: Computer Science
Topic: fuzzy match confidence w/ multiple attributes
Replies: 4
Views: 4671

Re: fuzzy match confidence w/ multiple attributes

Consider: Let's say we also have a phone number attribute. The CRM system says the entity is {"ACNE Corp", "555-1234"}, while the ERP has an entity {"ACME Corp", "555-1234"}. Taken on pairs of attributes, we will get two fuzzy match scores - let's say 0.8 for...
by Tub
Fri Jan 31, 2014 8:40 am UTC
Forum: Computer Science
Topic: Machine learning model vs heuristic?
Replies: 5
Views: 6709

Re: Machine learning model vs heuristic?

[..]that helps you predict for future data. Not. The machine learning model classifies your current data. Whether or not it's useful for future data is anyone's guess. As such, it's a heuristic. Use "machine learning model" if you need to make the source of the heuristic explicit. Feel fr...
by Tub
Tue Jan 14, 2014 11:07 am UTC
Forum: Science
Topic: Are physics in the particles, or reality itself?
Replies: 60
Views: 12156

Re: Are physics in the particles, or reality itself?

Thanks for the detailed writeup. I believe more than 1 time dimension gets you in all sorts of trouble though, so 1 time dimension. Any sort of trouble in particular? According to http://en.wikipedia.org/wiki/Multiple_time_dimensions it seems like such possibilities have been researched and the form...
by Tub
Mon Jan 13, 2014 12:39 pm UTC
Forum: Science
Topic: Are physics in the particles, or reality itself?
Replies: 60
Views: 12156

Re: Are physics in the particles, or reality itself?

If we start with a certain set of not-too-crazy assumptions (locality, lorentz invariance etc), there are quite heavy constraints on the "way things can possibly be", but they are not fully constraining. Given just your not-too-crazy assumptions, and ignoring any other observations about ...
by Tub
Mon Jan 13, 2014 11:15 am UTC
Forum: Science
Topic: Hexagonal pixels
Replies: 14
Views: 6075

Re: Hexagonal pixels

Has anyone ever attempted to take a subtractive approach to subpixels? Stack the subpixels "front to back" depth-wise, and make them "blocks red" (aka. cyan), "blocks green" (magenta), and "blocks blue" (yellow)? Why would anyone? Where's the advantage? I can...
by Tub
Sun Dec 22, 2013 3:05 pm UTC
Forum: Computer Science
Topic: all paths from a single source (undirected & unweighted)
Replies: 4
Views: 4465

Re: all paths from a single source (undirected & unweighted)

Yes, precomputing the adjacency lists is a must if you wish to make it reasonably fast. I've looked at Bellman-Ford algorithm, but that is for weighted digraphs, which I do not have. Of course you have. An undirected graph is just a special case, and your weights are 1. It's just graph theory 101, b...
by Tub
Mon Oct 28, 2013 12:52 pm UTC
Forum: Computer Science
Topic: Break Eskil Steenberg's encryption algorithm!
Replies: 3
Views: 4568

Re: Break Eskil Steenberg's encryption algorithm!

To start, the security of a OTP depends on the fact that it's entirely random. Using a PRNG with a low-entropy seed reduces the strength of the algorithm to the strength of the key. There's no OTP here, just key-stretching. The key is only used once and is random How would you share the key? If you ...
by Tub
Thu Oct 10, 2013 9:12 am UTC
Forum: The Help Desk
Topic: Virtual Machine trouble
Replies: 4
Views: 5414

Re: Virtual Machine trouble

According to this very simple search:
https://www.google.com/search?q=virtual ... stallation
other people on the vbox forums have encountered similar problems, and it appears to be related to the virtual SATA controller and its drivers.
by Tub
Mon Apr 29, 2013 6:48 am UTC
Forum: Computer Science
Topic: Soft hash function
Replies: 13
Views: 8826

Re: Soft hash function

Ok, let's take a step back. * The hash functions mentioned all suffer from being indifferent to order. ABCDEF will hash the same as DEFABC or BADCFE (depending on the hash). If you have a long enough DNA sequence in which all letters are uniformly distributed, summing up characters will always lead ...
by Tub
Fri Jul 20, 2012 11:06 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1084: "Server Problem"
Replies: 123
Views: 51660

Re: 1084: "Server Problem"

Basically the joke is that the guy screwed up the computer beyond being usable and he should just wait for the computer to become smarter than he is before trying to do anything else. Despite the state the poor server ended up in, I think it's safe to say that the server is already the smarter one....
by Tub
Wed Mar 28, 2012 11:41 am UTC
Forum: Mathematics
Topic: Finding the probability of a probability being at least 0.75
Replies: 12
Views: 2914

Re: Finding the probability of a probability being at least

I placed a coin in front of me, using my illusion of free will to choose one side. You don't know which side I took. Would you call a 1:1 bed on "heads" or "tails" (offered by someone else) fair? Define "fair"? If he has to offer a game about something he doesn't know ...
by Tub
Tue Mar 27, 2012 4:35 pm UTC
Forum: Mathematics
Topic: Finding the probability of a probability being at least 0.75
Replies: 12
Views: 2914

Re: Finding the probability of a probability being at least

I don't quite disagree but I don't agree with this statement. X is a fixed value yes, but it's an unknown value that we are trying to find. There is still a "probability of x being higher than 75%" because we don't know the value, even if it is already determined. X is not determined as t...
by Tub
Mon Mar 26, 2012 2:27 pm UTC
Forum: Mathematics
Topic: Finding the probability of a probability being at least 0.75
Replies: 12
Views: 2914

Re: Finding the probability of a probability being at least

First, you're trying to make a statement with an unwarranted accuracy. You're trying to model chess games as independant trials with a constant probability, which is such an oversimplification that the results will be approximate at best. People learn, people tire, people adjust to their opponents, ...
by Tub
Tue Mar 13, 2012 3:25 pm UTC
Forum: Science
Topic: How hard is it to transmit to other star systems?
Replies: 16
Views: 3416

Re: How hard is it to transmit to other star systems?

Even if you have a perfectly focused beam, how would you aim it? We're talking at least 4 light years to the closest star systems, so the receiver would have moved at least 8 years away from its currently visible position by the time the signal arrives. ⋅ Can we predict the future position...
by Tub
Fri Jan 27, 2012 9:21 pm UTC
Forum: Coding
Topic: Linux: Split terminal input area from output?
Replies: 6
Views: 4067

Re: Linux: Split terminal input area from output?

So you want input and output in two different terminal windows? In the first terminal, type: ~> myapp >/tmp/output In the second, type: ~> tailf /tmp/output You may be able to create a custom screenrc to start both sessions inside a single terminal window, but I wouldn't know the details. Or did I m...
by Tub
Sun Oct 16, 2011 1:23 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0963: "X11"
Replies: 103
Views: 28850

Re: 0963: "X11"

Nah, the next step is X12. There's been an update on the wiki this morning:

http://www.x.org/wiki/Development/X12
by Tub
Sat Oct 15, 2011 12:00 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0963: "X11"
Replies: 103
Views: 28850

Re: 0963: "X11"

(Seen the 24-monitor demos made to promote eyefinity? Guess why they weren't done on windows!) Could you elaborate on this? Windows has been capable of up to 64 monitors since XP's release (arbitrarily locked at 10, but by-passable - Redmond can be so dense sometimes!), and I think that was more of...
by Tub
Wed Oct 12, 2011 11:44 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0963: "X11"
Replies: 103
Views: 28850

Re: 0963: "X11"

I've had to fiddle with xorg.conf back when I had to use binary drivers. Nowadays, I use ATI GPUs with the open source drivers, and I don't even have an xorg.conf on two of my three machines. (The third has one merely to reset the screen layout during boot. Windows would just remember the last confi...
by Tub
Thu Oct 06, 2011 12:53 pm UTC
Forum: Computer Science
Topic: How to proof a lower bound for this problem?
Replies: 14
Views: 3485

Re: How to proof a lower bound for this problem?

Given two lists A and B, decide whether they consist of the same elements (in some order, i.e. check whether A is a permutation of B). If so, then you can use that as follows. I'll assume w.l.o.g. that A and B are lists of integers. Construct the set S containing the points (1,a) and (-1,-b) for a ...
by Tub
Fri Jul 29, 2011 12:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0930: "Days of the Week"
Replies: 126
Views: 28973

Re: 930: Days of the Week

How did you make that? Try right click -> view source. It's simple javascript/dhtml which I hacked up. One of my jobs is as a web programmer, so I know my way around that. I needed some google searches on css transforms/rotations to get as many browsers supported as possible, I used a tool to creat...
by Tub
Thu Jul 28, 2011 8:20 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0930: "Days of the Week"
Replies: 126
Views: 28973

Re: 930: Days of the Week

Surprised nobody has commented on this awesomely magic (and quickly produced) piece of modification. That's because it was my first post and it got stuck in the moderation queue. Thanks for quoting it and bringing it to others' attention! Not that fiddling with it wasn't enough reward, but it's alw...
by Tub
Wed Jul 27, 2011 3:33 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0930: "Days of the Week"
Replies: 126
Views: 28973

Re: 930: Days of the Week

Bellerophon wrote:I need a version I can rotate with my mouse around the centre. Someone! Internet magic me this thing!

Done!

http://www.authmann.de/xkcd930/

(yeah, newly registered, can't linkify URLs yet)

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