There are Web OSes springing up on the internet left and right these days. The web operating system, in its broadest definition, includes everything from complete browser based operating-system-like environments to terminal access-like services. I've been keeping a keen eye on the developments, partly because I think it will become one the next big raves on the internet and partly because I find such a services quite useful.

The currently active Web OS services all have free sign up available or at least demo versions for try-outs. Here are a few I've jumped through:












Enjoy

Google publishes a whole lot of interesting papers regularly at their Research Publications page. I tend to check up now and then since they do quite a bit of research regarding machine learning and artificial intelligence - my great love interests . Anyway, today I came across a simple paper published elsewhere on the use of Eigenvectors in Google's PageRank algorithms. It is an interesting read - would be more so for anyone with a bigger fancy for mathematics and a crush on Google.

The $25,000,000,000 Eigenvector: The linear algebra behind Google

Abstract. Google’s success derives in large part from its PageRank algorithm, which ranks the importance of webpages according to an eigenvector of a weighted link matrix. Analysis of the PageRank formula provides a wonderful applied topic for a linear algebra course. Instructors may assign this article as a project to more advanced students, or spend one or two lectures presenting the material with assigned homework from the exercises. This material also complements the discussion of Markov chains in matrix algebra. Maple and Mathematica files supporting this material can be found at www.rose-hulman.edu/~bryan.

Grab the paper at http://www.rose-hulman.edu/~bryan/googleFinalVersionFixed.pdf

The TED Talks from the annual TED (Technology, Entertainment, Design) conference is among my favourite online edutainment destinations and this month has seen them update the site with yet another collection of thought-provoking and informative talks from various top scientists and thinkers of today. I thought I'd give it a little exposure and drop in a mention of 3 random talks that I took a liking to...

Bonobo
I just watched a recently added talk titled "Apes that write, start fires and play Pac-Man" by Susan Savage-Rumbaugh. The talk is on Dr Susan's work on Bonobo apes - one of the closest hominid primates to humans. I've kept up an interest in Bonobos ever since I learnt of them (not too long ago!) and they've continued to fascinate me. They are quite similar to us in that they share more than 98% of DNA, they are tail-less and walk upright/bipedally. They've demonstrated the ability to understand when talked to, communicate via writing and fashion tools. They display altruistic behaviour, are compassionate and kind, care for their offspring pretty much the same as humans and live peacefully. Infact, their motto literally seems to be "Make Love, Not War". They are also understood to possess some of the fundamental ingredients to an intelligent society - culture and concepts of equality of individuals. Interestingly enough, unlike how human cultures have mostly been thus far, the bonobo culture is matriarchal!
- Check out the talk by Dr. Susan

Skepticism
I adore the Skeptics magazine published by the Skeptics Society. Its founder, Dr. Michael Shermer, gave a very engaging talk titled "Why people believe strange things". There's an abundance of supernatural claims and pseudo-science that litters our societies and his talk goes through some of the common claims - dowsing, creationism, UFOs, crop circles, so-called miracles and the rest of pseudo-scientific mumbo jumbo. He encourages critical, rational thought and scientific scrutiny.
- Check out the talk by Dr. Shermer

Chemical Scum
Prof. David Deutsch, whom I had mentioned about in a previous post, delivers a rough painting of the cosmos and where we stand respective to it in a light talk titled "What is our place in the cosmos?". He draws on the contents of the universe and bodies within it, the distances between objects and the ability of the scientific method to explain and model the vast and complex universe. The brain, he says, has the tools needed for solving almost any problem: knowledge, creativity and reason. A very inspiring speech!
- Check out the talk by Prof. Deutsch

Enjoy

Writing (simple) programs and games for mobile phones has gotten a whole lot easier thanks to Adobe/Macromedia's Flash Lite technology. It basically extends their flagship Flash presentation engine to the realm of mobile handsets by providing a player, similar to that which is installed on desktop PCs, to many of the mobile phones. The product effectively paves the way for the many animators, web developers and even beginners to easily develop rich programs for mobiles without having to delve into C or Java and presents a more lucrative solution than MIDP or BREW for creating device-independent light applications.

Anyone familiar with the standard Flash development techniques can quickly develop/port to Flash Lite and get it working. Transparent internet access, XML/HTML support and ActionScript are all supported - allowing for quite sophisticated applications to be built with ease. Flash Lite is included in the recent Adobe Flash CS3 release or can be added to Flash Professional 8 by downloading the free Flash Lite authoring update from the Adobe website. Many of the popular phones are supported and developers can download/update development profiles for different phones.

The possibilities for applications are numerous - games, data access front-ends etc and might be a great way for businesses to provide interactive information or services to customers with probably a lower development cost!

- Adobe Flash Lite product page
- Adobe Mobile & Devices Developer Center

A friend of mine, a very paranoid and drama-loving fellow, asked me recently for some suggestions on how to rapidly destroy a computer hard disk. He wanted to destroy his hard drive banks "if police came to get him". I don't know what possible reason the police may have for wanting him and his hard drives but being the dramatic fellow he is, I know he'd want to do it purely for the drama alone. Anyway, my solution to him was simple and most importantly, very dramatic: thermite!

A thermite reaction is an exothermic chemical reaction that generates temperatures reaching upto 2500 °C - more than enough to melt the entire hard drive and entirely destroy the magnetic lining of the platters. Thermite consists of aluminium and iron(III) oxide (better known as rust!). The two is to be mixed in a ratio of approximately 8 or 9 parts iron oxide to 3 parts aluminium. The aluminium needs to be powdered and can be obtained by filing/sanding soft drink cans or aluminium tubing. The iron oxide (rust) can be shaved off from a rusting iron rod and should be in powder form as well. I've successfully tried with aluminium filed off aluminium tubing that I had purchased for building an antenna and rust collected from a bunch of iron nails that had been rotting away.

Ignition is the most important part for getting the thermite reaction going and isn't an easy step for the method described above. The easiest way, which I recommended to my friend, was to use a magnesium strip. They aren't available in Male' but can be ordered online or purchased from abroad easily. Alternatively, I suggested, convince a chemistry student at CHSE to get some - they often use it as part of their weekly practicals and throw out a load of half-used strips to the bin anyway!

Finally, the thermite mixture can be placed in a little container and a piece of magnesium strip neatly stuck into it. The container can be placed on top of the hard drive with the magnesium strip accessible and ready for lighting when required! Once ignited, nothing will stop the reaction and extinguishers - be it water, foam or CO2 - will miserably fail too.

Needless to say, the prospects of having his hard disks melted in a fiery fire as cops watch helplessly really excited my friend...

Further info:
- http://www.ilpi.com/genchem/demo/thermite/
- Watch some thermite reactions

Note: Thermite is not fun play - stand well away and avoid using large amounts. Do be careful if you are curious enough to experiment

The Maldives Post Ltd introduced 5 digit Post Codes back in 2002. The houses in Male' and Villingili have their own post code available unlike the rest of Maldives which, for now, have generic codes handed out for each island/atoll including resorts and Hulhule'/Hulhumale'.

I thought I'd publish the data for Male' and Villingili, in tab-separated-values format, in case anyone has a need for them. The data files can be opened with any software that supports delimited text files (eg. MS Excel). The data is extracted from the Post Code Finder service on the Maldives Post website.

- Download the zipped files (55 KB)

I was about to brush my teeth yesterday while spending the day at the home of a Maldivian family here in the UK when I saw this gentle "notice" on the wall. I was so amused by it that I just stared at it till the message bore into my retina - toothpaste on the brush and raised to my teeth...

Have a laugh!