Year: 2006

Netflix prize

Netflix has released a sample of its customers’ movie ratings at Netflix Prize. You can download these (700 MB), create an algorithm that rates the training data, run it against the test data, and see if you can get better ratings than their algorithm. If you do, you win $1 million. (Chris Anderson explains why.)

Tamil lyrics quiz – TMS MGR

Here are words from the middle of 8 songs TMS has sung for MGR. Can you guess which movie they are from?

Don’t worry about the spelling. Just spell it like it sounds, and the box will turn green.

If the Tamil lyrics are not OK, turn on tamil scripts.

Search for the song and listen online, if you want to confirm your guess.

Score: 0 / 8

iruvar onRaanaal oruvar enRaanaal

iLamai mudivadhillai iLamai mudivadhillai


oru thavaRu seydhaal adhaith therindhu seydhaal

avan dhEvan enRaalum vidamaattEn


avaL illaamal naan illai

naan illaamal avaL illai


kaatru nammai adimai enRu vilagavillaiyE

kadalum neerum adimai enRu suduvadhillayE


mullai poovil aadum karu vaNdaagavE, mugil munnE aadum vaNNa mayil pOlavE

anbai naadi naadi undhan arugil vandhu ninREn, inbam ennum poruLai ingu kaNdEn


neela vaanam illaadha oorE illai, ulaginil mazhai inRi yEdhum illai

amudhE unai anRi vaazhvE illai, anbE idhu unmaiyE


andha oru naaL aanandha thirunaaL inRu ninaiththaal ennenna sugamO

paadhi vizhigaL moodik kidandhEn paavai mEniyilE


pudhiya sooriyanin paarvaiyilE

ulagam vizhiththukkoLLum vELaiyilE

Software for my new laptop

And so, thanks to Infosys Consulting being spun off as a separate legal entity in the UK, I got my new laptop. (Because our old laptops were legally the assets of Infosys Technologies Ltd, and not Infosys Consulting Inc. Weirder things have happened, but who’s complaining?)

My old Toshiba Portege A200 has been replaced by a Dell Latitude D420 (which I was dreaming for, after having just read Jeff’s post on big laptops).

Dell Latitude D420

Firstly, it’s light. I thought my Toshiba was light compared to the Dell monsters others had, but this weighs 1.4 kgs! Secondly, it’s thin. It’s thinner than some of the paper notebooks I used to carry. It’s hard to imagine where we will be in 5-7 years time if innovations keep rolling in at this rate.

There were only two (minor) problems I saw with it. It didn’t have an S-Video port — so I can’t watch movies on TV. And it had a fairly small (12″) screen. Being a wide screen, I get a lot less height than I used to. I’m still having some trouble getting used to that, especially when browsing tall pages but it’s a good laptop for playing games such as 올인구조대.

My weekend was like a kid in a candy store. Here’s what I did.

Uninstalled useless software: The laptop came with Roxio Easy CD Creator 5 Basic and PowerDVD 5.1. I got rid of them.

Copied all my files: I had about 25GB of data (15GB of music, 5 GB of books, 2 GB of video, 3GB of work). This was a bit tricky: some of my data was in SVN repositories, and I had to migrate them.

Configured the new system by literally running through each entry in the control panel, and ensuring that it’s the same as my old machine. Most of my changes are spartan (aimed at less eye-candy, usually). For example,

  • Display: I switch to Windows Classic and a black background. I used to do this because it takes less memory, but with 1GB of RAM, that’s no longer a consideration. I just got used to this. I also turn off all special effects, and remove everything except the Recycle Bin from my desktop. But the really useful thing is to turn on ClearType.
  • Taskbar and Start Menu: I switch to the Classic Start Menu, and turn off everything. Here’s what mine looks like now.Start Menu settings
  • Toolbars: I like my toolbars to fit on one line. So I do some heavy customisation with the Internet Explorer toolbar to shrink it to a line. Similarly on the desktop toolbars.

Installed software. This is the fun part. I’ve made a number of changes to my software inventory.

And finally, after reinstalling my SVN repository and copying my WinAmp playlists, Firefox bookmarks, etc, my new laptop feels as good as old.

Playing sounds backwards

You can play a video backwards and still recognise the scenes quite well. Can you do that with sound?

I tried it on this Bryan Adams clip of Summer of ’69 (mp3). When played backwards (mp3), it almost sounds like Arabic!

Instruments sound weird backwards too, like the guitar played backwards and drums played backwards.

It’s seems obvious once you see the wave file. The picture below shows the guitar. The sounds are clearly not symmetric left to right.

Sound wave diagram of a guitar

Whereas this guitar is a lot more symmetric, and doesn’t sound too different backwards.

Sound wave diagram of another guitar

So how come we can’t recognise sounds played backwards, but can recognise video played backwards? (Initially, I thought it was a trivial question. But I couldn’t find a trivial answer. The question may be subtler than it looks.)

Tamil lyrics quiz – TMS Sivaji

Here are words from the middle of 10 songs TMS has sung for Sivaji. Can you guess which movie they are from?

Don’t worry about the spelling. Just spell it like it sounds, and the box will turn green.

If the Tamil lyrics are not OK, turn on tamil scripts.

Search for the song and listen online, if you want to confirm your guess.

Score: 0 / 10

siRagil enai moodi arumai magaL pOla vaLarththa kadhai sollavaa

kanavil ninaiyaadha kaalam idai vandhu piriththa kadhai sollavaa


veLLi alai mElE thuLLum kayal pOlE

alli vizhi thaavak kaNdEn en mElE


undhan meen vizhigaLaik kaaNum nadhiyin meengaLum thuLLi aadudhE

aaNezhil mugam vaanmadhi ena alliyum ummai naadudhE


nadamaadum mEgam nava naagareegam

alangaarach chinnam alai pOla minnum


singaththin kaalgaL pazhudhupattaalum seetram kuRaivadhundO

sindhaiyum seyalum onRu pattaalE maatram kaaNbadhundO


kannith thamizh thandhadhoru thiruvaasagam

kallaik kani aakkum undhan oru vaasagam


en manam nee arivaay, undhan eNNamum naan arivEn

innamum oomaiyaippOl maunam yEnadi thEn mozhiyE


paRavaiyaik kaNdaan vimaanam padaiththaan

paayum meengaLil padaginaik kaNdaan


sollenRum mozhi enRum poruL enRum illai poruL enRum illai

sollaadha sollukku vilai yEdhum illai vilai yEdhum illai


vaarthai vandhadhum vaay thiRandhadhaa

vaay thiRandhadhaal vaarthai vandhadhaa