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Dave

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Everything posted by Dave

  1. Some of the time, yes. Most of the time, it hardly makes the slightest bit of difference whether they repave it or not, but I think you're right - the curing does help. I don't know about most of you, but there's a section on the M6 which keeps getting resurfaced every year and there just seems to be constant roadworks there (around junction 7). There's also bits on the M40 where they're resurfaced it with a very nice smooth piece of tarmac, but it's inconsistant and doesn't span all 3 lanes most of the time. There's a section on the M42 that is still concrete; which is a horrible surface to drive on, and that's been there for well over 10 years - they may not have even replaced it since the motorway was opened. Please bear in mind though that the UK traffic system is a complete shambles - we probably have more queues, ongoing roadworks and dissatisfied and quite frankly overtaxed road users in the country. And this probably doesn't contribute to the argument too much tbh.
  2. Dave

    Relativity

    Scientists at the time believed that light waves had to permeate (sp?) through a substances (e.g. water waves travel through water, sound through air, etc). They invented the ether as a substance for light to travel through. Don't know whether this explains your question, but hope it helps. As you may know, light when passed from one medium to another refracts. There is a way to explain this that I'm not completely familiar with, so I'll refer you to this that I found: http://theory.uwinnipeg.ca/mod_tech/node123.html As regards to Doppler shift, it applies for light at high (i.e. relativistic) speeds, but the formula changes somewhat because relative velocities are calculated differently for extremely high speeds. Hope this helps.
  3. They do here (UK) as well, and it causes bloody chaos. It all depends on how much preparation is made and how long the roadworks are delayed for (they usually are).
  4. Perhaps I should've been more specific - Windows applications can't run natively on a mac platform. I'm aware of VPC having used them extensively myself on my iMac
  5. Must've gotten deleted accidentaly when blike updated.
  6. I'm called dave and I like maths. Yes, I know, it's sad, get over it
  7. ANSI C is more of a standard than just libraries. I think it defines the most basic functions for i/o things and various other bits and pieces (stdio.h, stdlib.h, etc) as well as the syntax and different data types and keywords, but in any case it's completely up to the people who design the compilers as to how to convert the source into some form of object code. In the case of linux, there's a set of libraries called glibc that deal with the actual implementation of the basic C functions, and all C programs are linked against these libraries. Also you have to remember that it doesn't come down to libraries and formats completely. Running a program has a lot to do with memory management and kernel interaction; if you want to emulate an operating system, you need to create some way of emulating the kernel of that operating system so that the program gets the right stuff when it needs it. For example, the windows program I gave a link for contains a basic ELF parser and emulates simple kernel calls. Hope this helps some.
  8. Dave

    John Titor

    Moving house because of a few internet posts that were almost certainly written by a hoaxer is a little extreme in my opinion.
  9. To be perfectly honest, very little of modern mathematics has much direct implementation; I find myself sitting in lectures thinking 'what possible application could this actually have?' Don't get me wrong, I find it very interesting, and basically that's what modern mathematics is - investigating things we find interesting. More advanced concepts for the most part have little or no use in the real world.
  10. Dave

    Sasser Virus!

    It's when you get the ones that like to screw the registry over a bit that you're going to have a problem.
  11. It's also finding the time to do something like that, especially for people that need to get to the US in the first place (it's not exactly cheap from the UK).
  12. Everyone needs a little fun here and there
  13. (I should also point out that weather prediction systems require a couple of supercomputers just to process trivial data such as air pressure, temperature, humidity, etc).
  14. Sounds like an interesting trip - unfortunately I haven't got the time/monetary funds being a student
  15. Windows applications can't work on Macs because the CPU architecture is fundamentally different. You can run linux applications on windows. You just need to emulate the linux kernel (windows doesn't use the same kernel as windows, so syscalls and things like that are different), and also interpret the elf format of the linux applications. Theoretically you can run any linux program under windows, but you need to make sure that all your dynamic libraries are compiled as well. You might want to check out LINE.
  16. (moved here because it's a better home for the thread).
  17. Apparently it needs to be re-installed. Hope my high scores didn't get trashed though
  18. Got any links to the paper?
  19. Dave

    Ti-89

    It's banned in literally every exam I have to sit. (Although most of my papers are non-calculator).
  20. I kindof get the jist of the question, but basically it's just abstract set theory. Doesn't really have many applications. I believe a cardinal describes the size of a set (i.e. the cardinality of a set, etc).
  21. Hmm. I think I'd be tempted to go for something a little more extravagent if I had all the power in the universe
  22. As an example of this, take the double pendulum. It works exactly asyou think it should, as long as you don't elevate it above an angle of 90 degrees (I think). There's a nice site on it over at wolfram: http://scienceworld.wolfram.com/physics/DoublePendulum.html It's an example of a very simple system that will show signs of chaotic behaviour quite easily.
  23. A bit more accurately put, photons have no mass.
  24. Dave

    John Titor

    I doubt he'll come back (and neither will I care tbh). I do like a good hoax though, they're good fun to read.
  25. Dave

    Marie Curie

    Just did a quick google and it looks like they used it for 'healing powers' (since some of the springs around the world, which have quite a lot of natural radiaton have these so-called powers). http://www.orau.org/ptp/articlesstories/quackstory.htm
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