Nano Smiley Face made from DNA!

DNA_smiley.jpg

“A nanotechnologist has created the world’s smallest and most plentiful smiley, a tiny face measuring a few billionths of a metre across assembled from strands of DNA. Dr Paul Rothemund at the California Institute of Technology can make 50 billion smileys, each a thousand times smaller than the diameter of a human hair, with his technique.”

Ref: Paul W. K. Rothemund (2006) “Folding DNA to create nanoscale shapes and patterns”, Nature 440:297-302 (16 March 2006) doi:10.1038/nature04586

Abstract

read more | digg story

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Burning visible images onto CD-Rs with data (beta)

“By carefully choosing the right 1s and 0s to burn to a CD, it is possible to burn visible images on normal CD-Rs. These images rely on the fact that the 1s and 0s created by pits in the CDs surface reflect light differently…”

This is just insane!

There are even MATLAB programs etc on the website to help you do the same!
What an innovative idea! Remember, this is nothing to do with the Lightscribe kind of stuff… since Lightscribe requires special media…

Read more at Instructables: http://www.instructables.com/ex/i/6227EC9EE1DB1028ABAA001143E7E506/?ALLSTEPS

read more | digg story

Cometh Holi, cometh the Ho(o)ligans!

Holi, the Indian festival of colours is quite a one-of-its-kind festival, commemorating both the destruction of Holika, as well as the burning of Manmatha, symbolising desire/lust. Read more on the mythology on wikipedia: http://en.wikipedia.org/wiki/Holi

However, the colour-throwing, as fun as it may be, has often been quite a nuisance, since a lot of people are quite paranoid about the synthetic colours, their adverse effects on the skin/eyes, leave alone merely getting very very dirty! A lot of hooliganistic behaviour has often been seen in various cities, Delhi I think, being particularly notorious, and Bombay too, uncharacteristically.

Even in an elite place like IISc, there is too much of hooliganism to believe or bear. The messes were messed up, as were several corridors. And after all this, this was probably the cleanest of the last three Holi’s I have seen here. The first one was a veritable disaster with colourful handprints on the brand new hostel’s walls. The next time, not even departments were spared, with colour strewn all over. This time, being a working day, the damage was contained I should guess. People walking into messes with colours strewn all over is never an endearing sight, more so if they take food — from the perspective of everyone’s health and hygiene! — dirtying chairs and the food alike.
The bottomline is that the celebration of the victory over the Asuras, of Prahlada being saved is celebrated indeed in Asura fashion. Some serious soul-searching needs to be done by these people. No one objects to peaceful enjoyment. Why drag in someone who is not interested? (Curiously, I say all this even though I’ve had to suffer nothing!) Why is there a failure to merely respect each other’s preferences?

π day

π = 3.14159 26535 89793 23846 26433 …

3.14 = March 14 happens to be pi-day every year. Curiously enough, it also happens to be Einstein’s birthday!

http://www.angio.net/pi/bigpi.cgi gives you a search engine to search for digits of π. For example, a search for 15081947 gives

“The string 15081947 occurs at position 604,341 counting from the first digit after the decimal point. The 3. is not counted.

The string and surrounding digits:

99538905839657483550 15081947 01003364946075415680″

If you are quite crazy about π, you might want to pick up this geeky T-shirt (I created something very similar on photoshop, yet to print it!) from thinkgeek.

Indeed an enigmatic constant!