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Everything posted by Dave
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It'll be interesting to see the results. I don't think it's possible, myself, but then again I am a bit of a pessimist. I agree with your opinions though. The political stuff that's going on behind-the-scenes is rather silly when all's said and done.
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Edit: Sorry, this was wrong. Thought you said +infinity instead of -infinity
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Don't forget about BSD for all you hardcore users out there I can't think of anything else that springs to mind that's not overkill. Linux is coming on a treat in terms of usability though tbh. I dualboot with Gentoo Linux and Windows XP myself.
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Hmm. I have a £10 Ottokar's gift voucher to spent still, so I may visit there sometime today
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Activation E-mail Not Received?
Dave replied to Exordium's topic in Suggestions, Comments and Support
I'll send a PM to blike/sayo, they should be able to sort you out. -
Just nitpicking: [math]\sin(x) \leq 1[/math]. Rest of it is fine though
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Well, he's not so much proving the definition of a Fourier transform as deriving the definition of the inverse Fourier transform from the definition of a Fourier transform.
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Formatting a 90 % full18 GB HD in Win XP takes less than 1 sec???
Dave replied to Edward's topic in Computer Science
Indeed. I have the latest version of that on my Linux install. Wipes the floor with everything else -
Formatting a 90 % full18 GB HD in Win XP takes less than 1 sec???
Dave replied to Edward's topic in Computer Science
Well, yes. I don't really know why 5614 suggested that -
I always wanted to do Chemistry at A-Level, but unfortunately my school wouldn't let me do 6 A-levels However, now I'm going to have a bit of spare time over the holidays, I'd like to get to grips with the basics again and maybe go and do a Chemistry A-Level at my local college. I'd just like to know if anyone can recommend any good books, online references, and soforth. I'm quite interested in doing this, but unfortunately my maths has kept me quite busy Cheers in advance.
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I wouldn't necessarily say that they're proving theories to be right. It's more like contributing evidence which is in accordance with what the theories predict - you can't really prove anything to be 100% right in Physics. Just nitpicking, don't mind me
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Formatting a 90 % full18 GB HD in Win XP takes less than 1 sec???
Dave replied to Edward's topic in Computer Science
I think he meant DOS emulation, aka cmd. -
I've taken the liberty of typing up some of the reactions from the "What's your favourite reaction thread" as some more examples. These were pretty much copied and pasted straight in: H2SO4's: [ce]Ca2C + H2O -> Ca(OH)2 + C2H2[/ce] akcapr's: [ce]2Zn + O2 -> 2ZnO[/ce] and [ce]NH4NO3 -> N2O + 2H2O[/ce]. ed84c's: [ce]HF + Rb -> RbF + H2[/ce] Another note: make sure you leave spaces between two elements that you want to connect up to a +; otherwise mhchem will think you're trying to type in an ion: [ce]H2O+H2O -> 2H2O[/ce] or [ce]H2O + H2O -> 2H2O[/ce].
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I think that, for the moment, they're rumours. I've not read it at el Reg, which is pretty much bound to have that kind of thing.
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For equations, it's best to use \ce. It renders -> properly then.
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I should point this out: you need to encapsulate everything in math tags: [math ]\cf{SUPErB}[/math] (except for the little space).
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Okay, a little introduction for people who've never used LaTeX before. Click on the images to look at the code that generated them. Basically, it's very simple. We can use the command [ce][/ce] to create individual molecules by themselves. For example, say we wanted to do H2SO4 - which is understandable, but looks a lot nicer with LaTeX. Then, in BBCode, we'd have the phrase [ce]H2SO4[/ce], as follows: [ce]H2SO4[/ce] Basically, you type whatever comes into your head. LaTeX sorts all the formatting out for you. Let's try a harder example: what about something like an ion H+? Again, type whatever comes into your head: [ce]H+[/ce] Click on the image to see the code that generated it. A little harder: (NaPO3)2. This requires not a lot more effort: [ce](NaPO3)2[/ce] Indeed, we just type it in like we did the last lot. It even typesets fractions for you: [ce]1/2H20[/ce] So typesetting this stuff is pretty easy. Formulae are just as easy. When you want a single arrow, you type ->. We can get something like: [ce]CO2 + C -> 2CO[/ce] pretty easily. You can make the arrow go left by typing <- instead of ->. To get something above the arrow, you need to put T[yourtext] next to the arrow. For instance: [ce]CO2 + C <-T[above] 2CO[/ce] The T basically tells LaTeX that you want text above, not some kind of math symbol. You can even get double arrows by using <=>, and if you wanted a longer arrow on the top then you might use <=>>. You'll want to check out the documentation (at the top of the page). It has a load of examples you can get your teeth into. Good luck
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Oh yes, here's a very complex example to show you how much this thing can do: [ce]{{x\,}} Na(NH4)HPO4 ->[\Delta] (NaPO3)_{{x}} + {{x\,}} NH3 ^ + {{x\,}} H2O[/ce]
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So, in my quest to make LaTeX more useful on the forums, I stumbled upon the mhchem package. Basically, it allows you to very easily typeset chemical formuae and reactions. For example: [ce]CO2 + C -> 2CO[/ce] This looks great, and it's not complex either: to see the text I used to generate it, click on the image. Instead of using the [math] tag, we use the [ce] tag for chemical equations. Also, you can put things above the line, like so: [ce]CO2 + C ->[\text{heat}] 2CO[/ce] Here's a few more examples to whet your appetite: [ce]CO2 + C <=> 2CO[/ce] [ce]H+ + OH- <=>> H2O[/ce] [ce]SO4^2- + Ba^2+ -> BaSO4 v[/ce] If you want to typeset an individual molecule, such as [ce]H2SO4[/ce], the [ce] tag can handle it easily. You can do some of the following things as well: [ce](NH4)2S[/ce] [ce]NO3-[/ce] Hope you find it useful; I'll post again in a little while. [Important note: Some posts in this thread have LaTeX that does not display correctly. This is because they used the old method of displaying chemical equations. The new method, the [ce] tag, is now the only way that works.]
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Formatting a 90 % full18 GB HD in Win XP takes less than 1 sec???
Dave replied to Edward's topic in Computer Science
Basically NTFS is quite a modern filesystem. FAT32 dates back quite a while now, and it's pretty much outdated. That's my main reason for formatting NTFS now -
Calculus I - Lesson 3: Properties of the derivative
Dave replied to Dave's topic in Analysis and Calculus
Argh! Too many brackets The idea is right though -
My personal opinion is that the death penalty is an outdated, barbaric and downright backwards sentence that is not fit to be implemented in a modern judicial system. Obviously you disagree. I don't want to drag this thread into a debate about the death penalty; there's already far too many threads on the subject already. As for your other comment... well, I will refrain from posting my personal opinion on that in this forum. This thread is supposed to be about posting peoples' opinion of a paedophile, and I suppose you've shown that already.
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Well, quite. You're always going to have that sort of thing going on. Personally, I get hosting from the same place that Sayo does. Nice amount of disk space, nice transfers, can host up to 10 domains. All for £5.99/month. Can't get a lot better than that.
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Ah yes, forgot to mention which paper I read. When I do actually get a paper, it's usually the Times or the Guardian. Although Times went to the tabloid layout which I don't like very much, so it's mainly the Guardian for me.