RyanJ

I cannot logically get my head around the dilation of time, or that time elapses differently according to who is observing what. But in particular, how was Einstein, or anyone else, able to reason that time was not an absolute and now have it confirmed by experimentation?

I am still not enlightened about why - though I can regurgitate some of the explanations that I do not truly understand.

I apologise if this has been raised, discussed and answered previously. If so, could you please direct me to an enlightening repsonse to my ignorance?

 

Thanks.

 

Ferdinand

I think of time dilation like this (not sure if its factually accurate, its only meant as a way of thinking about how it works for me).

I imagine the combination of velocity through space and time to have an ultimate maximum, the speed of light. When we are absolutely stationary we have no velocity through space and therefor must be expending all the "velocity" through time. However when we move through space some of the "velocity" through time is taken and transfered to space therefor time elapses are a slower rate (velocity) with increased speed.

As I said its not meant to be taken literally, just an example of a way I think explains the effects well.

-- Ryan Jones

quick question: as long as the js encryption is asymetrical, could you include, as part of the encryption prosess, something dependant on, say, the time/date. thus, the password will not be the same twice, and resubmits would be easy to spot.

 

not that making asymetric encryption keys sounds all that easy

Don't forget with sufficient skill and a little knowledge in the language all these can be manipulated. The date and time objects in JS allow you to mess with dates so the hacker could set their own date ID, as for the IP they could intercept that too... Client side encryption is a bad idea period, if you want it - use SSL as was suggested earlier

Client side encryption via JS isn't really that effective. The effect of not encrypting the data verses the time spent writing long and pointless JS algorithms makes it unnecessary.

Encryption via JS isn't secure at all.

-- Ryan Jones

I worked this out last night (one of those "I woke up with the answer deals).

If anyone wants the answer just PM me so others can keep trying

If you can get your hands on it, VS 2005 is the way to go. Its the easiest and fastest way to build a server side web app. There are many asp.net programing examples in C#, J#, and VB.net on the Internet that do what you discribed that you can use to get started.

None of the above are true web oriented languages, maybe with the exception of APS and ASP.net. PHP, Ruby or Perl are probably your best bets - avoid anything involving ActiveX or other bad junk.

-- Ryan Jones

Would't this be bettr in one of the physics sections?

-- Ryan Jones

Hi everyone!

I've been trying to solve this for a while and with no success ( suck at logic puzzles ) so I thought I'd post it here for you guys to try.

The following digits are in an order.

 

What you need to work out is what order are they in.

 

0 2 3 6 7 1 9 4 5 8

If you work it out please post a hint for the rest of us mere-mortals

-- Ryan Jones

Could always hide a web cam, link that up to a program that records the feed and then play it back too them later

-- Ryan

Just out of interest does any body know what the law is over the possession of uranium rocks and objects such as radium painted clock-hands UK? I know that they are freely available through companies like united nuclear in the US but they don't seem to appear anywhere in this country. Can anyone provide an explanation?

No idea but considering how strict it is here for normal chemicals I'd guess trying to import something like that without the correct permit would get you in trouble.

Just my opinion, I don't know for shure.

-- Ryan Jones

Well, there is nothing very important on my computer, I just want to catch her red handed.

Key logger maybe? Action logger would do the job - it would tell you the time it happened and the things that were accessed, what was types etc. These are pretty effective as long as the person doesn't know they are there.

-- Ryan Jones

Thanks for the reply Woelen, very interesting!

-- Ryan Jones

Just an update: Got a copy of the book and so far it hasn't been to hard to understand (some of the maths will take me a while to research and uderstand though).

Seems like an interesting book

-- Ryan Jones

If you study chemistry at university you will study group theory and molecular orbital theory and all will become clear. It is a little difficult to explain but aromatic systems with 4n+2 pi electrons delocalise, whereas those with 4n pi electrons are localised

Unfortunately I haven't made it that far yet - just working ahead, even though its not essential to know this I just find it useful to ask the questions anyway.

Considering it would be very unstable I'd say it couldn't exist for very long if at all but I don't know for shure which is why I'm asking and can't seem to find out much about it.

-- Ryan Jones

I have a suspicion who this might have been. You´re not a misbehaved 14 year-old, by chance?

Nope... add 4 more years to that and your nearly there (Or will be there Oct 12).

-- Ryan Jones

Hey everyone!

I've missed a bit of school and I'm reading up on what I've missed (turns out it was a lot of organic chemistry stuff) and one of these topics was about benzene.

Kekulé's original idea was alternating double and single bonds within the carbon loop but this was shown to be inaccurate because the bond lengths were identical, and that benzene under went substitution rather than addition (Now what you'd expect if there were double bonds in the molecule) and the molecule was more energetically stable than was expected.

My question is this; could Kekulé's idea for benzene actually exist - eve if for a short period of time?

-- Ryan Jones

I hope it wasn`t Chem experiment related!

 

Fantastic to have you back again though

Nope - nothing experiment related.... unless someone has been experimenting on me

-- Ryan Jones

Hi everyone!

I've been away for far too long.... school work and time at the hospital has kept me away but I should be around much more now (not as much I would like because of school admittedly).

-- Ryan Jones

Sweet, how current should it be? The one I'm looking at is from 2002, too old?

You don't really need a book, as long as you know HTML the conversion to XHTML is simple - have a read of the W3schools tutorials.

http://www.w3schools.com/xhtml/xhtml_intro.asp

-- Ryan Jones

I only have one more piece of advice, develop your web applications in Firefox or Opera first then work out how to hack it for IE compatibility.

This] page gives you some insight into exactly what is supported in what browser (greater detailed information is also available too).

Other than that I agree with what Sayonara said

-- Ryan Jones

I would recommends the Web Developer toolbar for Firefox, its useful for testing.

Also a Firebug if your developing JS apps - both are very useful.

-- Ryan Jones

Looks like quite a bit to learn. I'll probably have to look into programs like dreamweaver too, right?

Best advice is if you want correct code, don't use one of those fancy WYSIWYG editors and instead write the code yourself.

Even though they do work pretty well - they add things to the pages that are not necessary and will most probably ruin your pages page ranking for having invalid content (Google bot's pare picky about stuff like that.)

Best advice is learn correct (X)HTML & CSS then extend from there, PHP works great for dynamic pages as Cap'n Refsmmat has already said and JS is also well worth looking into for some things.

Good luck on your quest!

-- Ryan Jones

Yes' date=' it is a most awesome book, however it has maths that are over my head.

 

I bought it after having read another of Penrose's books, [i']Shadows of the Mind[/i], which was, to put it bluntly, completely absurd.

 

Penrose may be an awesome physicist, but when it comes to consciousness, he's completely lost.

Hmm - OK. Thanks - I'll get the book anyway and see how much of it I can understand anyway For £15 you can't go far wrong anyway!

-- Ryan jones

Hi everyone!

I've been away for a while, with exams and being quite ill the last month but getting better now and I'm thining of starting anew book called The Road To Reality by Roger Penrose.

Has anyone actually read this book and have any comments on weather its worth getting ro not, the way I see it for £15 its well worth the money but I'm interested in peoples comments too

-- Ryan Jones

Ive got the same question' date=' but my teacher said to answer with the use of modulo. I dont understand:confused: Please help

Thanks[/quote']

 

Modulo is when one number is divided by another and the remainder is returned.

 

E.g. [math]3 mod 2 = 1[/math] because 3 is divisible by 2 exactly once leaving 1 as the remainder.

 

-- Ryan Jones

Great job - love it!

Thats quite a bit of work and it looks like a good job too

-- Ryan Jones