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What to do before you bring your computer to a technician by Schmungles on September 1st, 2009, 2:01 pm
So often I see people bring me computers that, honestly, aren't terribly hard to fix and indeed have problems that they could fix themselves if they just stepped back and thought logically about a few things. Bringing your computer to a technician in some cases is frustrating for the tech, because while we take 5 minutes to frequently do nothing more than shut your pc down and boot it up again (voila, problem solved) we aren't able to focus on computers with more complex problems. Also, it tends to frustrate most people when they see that the problem didn't really require a tech's knowledge or expertise to fix.

Here are some steps you should always take before you seek professional help:

1. Think about what you or the computer was doing immediately before the problem occurred. Did it just download and install updates for the operating system? Did you just install a new piece of software? Did you install a new piece of hardware? Did you foolishly click on a link...

Read this, tell me what you think. by Melton_J_08 on December 22nd, 2010, 5:50 pm
we are stuck on this miserable little palnet and we are, in a sence, all alone... im not saying there are or are not alians... i dont really care about them... its us im talking about... we are alone and we will stay that way for all eternity... we are living proof that hell exists and yet we are in heaven... this planet is only one of an infenit number of rocks floting in space... people say that we were created so that everyone has a perpous and has a choice to fufill that or not... i disagree.. i believe we are here by mistake... a random freak accedent that will always repeat its self time and time again till there is nothing... i believe that we are just proof that nothing that can call itself a 'HIGHER POWER' exists.. God, Ala, Buda, ect... there is nothing that may have once existed, that can make all that we know by itself... man is here because we just are, we grew this way becuse of what we needed.. its like looking at light... its beautyful but is it anything but light? is it...

First Entry by bjnoel on April 19th, 2011, 10:15 am
My name is Benedict and I'm from Perth, Western Australia. I've joined this forum as I have an interest in science, particularly computer science!

I've recently launched a new website where people can get science R&D work done at http://zombal.com.

0 by Fuqin on April 13th, 2010, 2:54 pm

Quaternions, Angular Velocity, And Euler's Equation by xcthulhu on March 31st, 2011, 8:36 pm
Lately I've been studying quaternions for some software I'm writing to do space-craft attitude simulation. This involves brushing up on my basic mechanics, as well as my algebra - because the standard in aerospace is to represent rotations in terms of quaternions which do not have coordinate singularities.

Now one thing I need to do in my simulations is to approximate the instantaneous angular velocity tensor $\omega$, which is obtained from the momentum vector $L$ and the moment of inertia tensor $I$, which I am to be provided by my engineering friends. Specifically, the equation relating these is:

$L = I \cdot \omega$

Not really all that relevant, just background :D

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Moreover, we may observe that the rotation $A$ obeys the following:

(1) $\frac{\partial A}{\partial t} = \omega \cdot A$...