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Last Updated: Friday, 24 June, 2005, 17:07 GMT 18:07 UK
Webscape
Kate Russell
By Kate Russell
BBC Click Online Webscape-r

Kate Russell gives us her latest selection of the best sites on the World Wide Web.

Quantum Physics Made Relatively Simple website

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We kick off today with the work of a great man. A Nobel Prize winner and a refugee from Germany in the Second World War, Hans Bethe was a legend in his own lifetime as one of the principal architects of quantum theory.

Quantum Physics Made Relatively Simple is the title of the website that houses three video lectures given by the great man himself at the age of 93.

Speaking English with a strong German accent, he has actually managed to make the subject happily digestible, as hard to believe as that is.

Steering clear of the usual collection of complex mathematics models, these lectures are pitched on a more personal level - and I found a lot of it much easier to understand than I had expected.

If you have QuickTime set to play in your browser, the slides used during the lecture will be displayed on the right. For those using a narrowband connection there is also the option to listen to the audio only.

For a more detailed synopsis of Hans Bethe's life, go to the About Hans Bethe page.


World's Brainiest website

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If that last website has you feeling all intelligent, then our next stop will give you the chance to test your expanding brain.

World's Brainiest was sent in to us by its creator, Steve Jones from Manchester, and is a must-visit for all you quiz-aholics.

I have to admit to being a bit of an idiot when it comes to general knowledge quizzes. The information is in there, it just does not seem to want to come out when required.

To begin playing you will need to register. All that is required is a user name and password, and I saw nothing to worry me in the very brief privacy policy.

Now you can now start testing your brain. There are a few options to choose from, all of which pretty much speak for themselves.

To take the World's Brainiest Quiz, click the appropriate link and then start entering your answers. But be careful - once you hit 25 wrong answers, it is all over and you cannot try that quiz again until the questions are changed the following month.

When you have finished, you even get to print out a certificate to prove to your friends how smart you are or, as in my case, to prove how rubbish you are!


CCleaner website

The BBC is not responsible for the content of external internet sites.

How many of you partitioned off a section of your hard drive to run your operating system on?

If you did, there is a good chance that over time you are finding there is not much space left on it and are dreading the prospect of having to reformat the drive to get rid of some of the unwanted data.

At CCleaner you will find a most helpful little application that will allow you to put off that dreaded clean install for another couple of months at least.

I was in this situation myself recently, with only 120MB spare on my C:drive. After installing and running CCleaner, I was left with 650MB! And all it did was delete temporary files and stuff that has been cached.

The download and install process is easy to follow. Just click Download on the toolbar at the top and then choose your desired site.

This software is offered as freeware, which means you do not have to pay to use it and I found no hint of spyware, which is nice. If you are feeling generous, then that is what the Donate button in the download window is for.

Using the program is really quite obvious too. Just tick or untick the options you want to delete and click Analyse to tell you how much space you will create.

Do be aware that things like auto logins on websites you visit regularly are stored as cookies in your browser software, and deleting them will mean you have to enter your password again next time you visit - if you can remember it, that is!


World Clock website

The BBC is not responsible for the content of external internet sites.

Finally, a quick visit to a website sent in by Geoff Beadle, who liked the World Clock website we covered on Webscape recently but found this one which he thinks is even better and I have to say I agree with him

The Time Ticker looks great and sounds pretty funky too, complete with comedy "boinging" effects when you click to a new area on the map. And it is that easy to find the time anywhere in the world.

The ticking can be turned off using the controls at the bottom and, if you want to hear the time read out, then use the Announcing Time button on those controls. You can even ask the website to set the correct time on your computer, but only if you're browsing with Internet Explorer.


Click Online is broadcast on BBC News 24: Saturday at 2030, Sunday at 0430 and 1630, and on Monday at 0030. A short version is also shown on BBC Two: Saturday at 0645 and BBC One: Sunday at 0730 . Also BBC World.



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