Where is Everybody?

"New Ideas" - That's what make our life interesting. Here is one... I copied exactly from the source

A new model shows how the spread of ET civilisations can undergo phase changes, providing a deeper insights into the Fermi Paradox.

In 1950, the Italian physicist Enrico Fermi raised the question that now bears his name. If there are intelligent civilisations elsewhere in the Universe with technologies that far surpass our own, why do we see no sign of them?

Since then, the so-called Fermi Paradox has puzzled astronomers and science fiction writers alike. And although there are no shortage of ways to approach the problem (this blog has covered them here and here for example), nobody has come up with a convincing explanation. .

Now there is another take on the problem thanks to a new approach by Igor Bezsudnov and Andrey Snarskii at the National Technical University of Ukraine.

Their approach is to imagine that civilisations form at a certain rate, grow to fill a certain volume of space and then collapse and die. They even go as far as to suggest that civilisations have a characteristic life time, which limits how big they can become.

In certain circumstances, however, when civilisations are close enough together in time and space, they can come into contact and when this happens the cross-fertilisation of ideas and cultures allows them both to flourish in a way that increases their combined lifespan.

Bezsudnov and Snarskii point out that this process of spreading into space can be easily modelled using a cellular automaton. And they've gone ahead and created their own universe using a 10,000 x 10,000 cell automaton running over 320,000 steps.

The parameters that govern the evolution of this universe are simple: the probability of a civilisation forming, the usual lifespan of such a civilisation and the extra bonus time civilisations get when they meet.

The result gives a new insight into the Fermi Paradox. Bezsudnov and Snarskii say that for certain values of these parameters, the universe undergoes a phase change from one in which civilisations tend not to meet and spread into one in which the entire universe tends to become civilised as different groups meet and spread.

Bezsudnov and Snarskii even derive an inequality that a universe must satisfy to become civilised. This, they say, is analogous to the famous Drake equation which attempts to quantify the number of other contactable civilisations in the universe right now.

The question of course is what kind of universe do we live in: are the parameters here ripe for the evolution of a single cosmic civilisation or are we condemned to be forever alone?

Bezsudnov and Snarskii say there's only one way to find out: wait and see.

Thanks to the source

Ref:arxiv.org/abs/1007.2774

The Fire

Yesterday I had a nice time with my friends. We had camp fire at near by lake. I don't exactly remember when I have seen the real fire last time. Today no one requires fire, we all have electrical heating, or heating in some other way. We miss the opportunity to look at the fire and experience one of the elemental force of the nature. Whenever I go to beach, I feel a strange kind of happiness. Its not just because of the beauty of the beach, but a much deeper understanding of the importance of the elemental forces as a physicist. I had the same feeling yesterday. I saw the fire as well as the water in front of me. I fell in silence. It gave me warmth and comfort. I don't know how to express my feeling. It was simply great......

Open source image processing

Yesterday we visited Hindu temple at Hamm. It's not quite often that you come across Hindu temples out side India. We took photographs using Cannon EOS 400D SLR camera. I took the raw image and processed using Open source software GIMP. There is a common misconception that these free softwares are no way comparable to the professional softwares. I agree the fact that open source user interface may not looks good, it may have bugs in it. But still its capable of producing quality outputs. I knew only few functions in GIMP. I feel that is sufficient to process my photos.


Here is an example, I took the worst photo from the trip and tried to get best out of it. This one is taken with wrong camera settings

I used GIMP to process the raw data and got this photo


These photos are symbolic representation that the darkness create by Microsoft and Apple will soon be removed by the light from the free(as in freedom, not in terms of money) softwares.




Here is the FSF song from Richard Stallman, software freedom fighter..



Be proud to be an open source user.. I DO.......

Narcissus

The Alchemist picked up a book that someone in the caravan had brought. Leafing through the pages, he found a story about Narcissus.

The Alchemist knew the legend of Narcissus, a youth who knelt daily beside a lake to contemplate his own beauty. He was so fascinated by himself that, one morning, he fell into the lake and drowned. At the spot where he fell, a flower was born, which was called narcissus.

But this was not how the author of the book ended the story.

He said that when Narcissus died, the goddesses of the forest appeared and found the lake, which had been fresh water, transformed into a lake of salty tears.

"Why do you weep?" the goddesses asked.

"I weep for Narcissus," the lake replied.

"Ah, it is no surprise that you weep for Narcissus," they said, "for though we always pursued him in the forest, you alone could contemplate his beauty close at hand."

"but... was Narcissus beautiful?" the lake asked.

"Who better than you to know that?" the goddesses said in wonder. "After all, it was by your banks that he knelt each day to contemplate himself!"

The lake was silent for some time. Finally, it said:

"I weep for Narcissus, but I never noticed that Narcissus was beautiful. I weep because, each time he knelt beside my banks, I could see, in the depths of his eyes, my own beauty reflected."

"What a lovely story," the Alchemist thought.

The Alchemist, by Paulo Coelho
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Original version the parable taught us the sufferings of narcissism, an extreme obsession of appreciating one's own beauty. But this modified version of the classic parable has a much different lesson to teach, it teaches how beauty is contemplated through another’s beauty. Narcissus looked onto the lake in order to see his own beauty, but in return the lake looked onto Narcissus to see its own beauty too. Was Narcissus or the Lake narcissistic? In this version,they weren’t. Narcissism is an extreme obsession of oneself, an intense self-worship, where the person completely disregards every beauty and only cares about themselves. A narcissistic persons are blinded by their own self-obsession so much that they are unable to see other’s beauty. Narcissists do not really find their true beauty either,instead they are obsessed with trying to find their own beauty. In that process they completely ignore every true beauty in the world. But in this story neither Narcissus nor the Lake are true narcissists because knowingly or unknowingly they accepted and showed each others beauty and could see their own beauty too. This story says something important about ourselves, about how we see ourselves through the reflections from everything around us. The story is trying to teach us a very important lesson and that "the only way to see your own true beauty is to appreciate another’s".

Nanos gigantum humeris insidentes

Dwarfs standing on the shoulders of giants (Latin: nanos gigantum humeris insidentes) is a Western metaphor meaning "One who develops future intellectual pursuits by understanding the research and works created by notable thinkers of the past"(from wiki). A Dwarf standing on the shoulder of a giant could have a better foresight and guide the giant towards the light. This philosophy has one drawback. Though the dwarf could see the direction of light, it forgot to examine what's beneath his foot. The road to light may not be straight and it may have several obstacles. One miss foot could end the journey of both. So it is important that sometimes the dwarf has to come down and examine the local path.

"The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think. When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty - some most unsure, some nearly sure, but none absolutely certain."-Feynman
It's good to read and understand the works of the intellectuals of the past, but we don't have to take anything for granted. This is the philosophy of ignorance. In another words "Empty your cup".

302kmph

I love to travel by trains, especially by ICEs in Germany. Their elegant and aerodynamic look makes it more beautiful than any other trains in the world. Even though ICEs could reach the speed of 300kmph, it is allowed only on certain routes. Luckily I could pick up one such routes on my way back from Jülich to Regensburg. I took ICE 613 from Köln to Frankfurt airport, which happened to be an high speed ICE.

The train left Köln at 17:54, reached the next near by(25km) station Siegburg at 18:09 and left Siegburg at 18:11 to Frankfurt airport. The length of the train route is 143km. It reached Frankfurt station at the scheudled time 18:54. So it took 43 mins to cover 143 km. So the average speed is about 199kmph.

I knew this is an high speed track. So I sat in a place where I could see the digital screen which displays the speed of the train. The number on the screen fluctuating between 230 to 290. I was eagerly waiting to see the 300 mark. Finally it happened. I was so excited to see the number 302kmph on the screen. So On 17th Aug 2009 at 18:33 I hold the record of traveling at the speed of 302kmph on ground.

The ICE design is so good that I don't have a feeling that I traveling in such a high speed. The high speed is realized when a train passes in the opposite direction, the low pressure region between the trains pulls the train towards each other and I felt a slight shake in the train. It was a wonderful experience.

Congratulations Federer

Roger Federer became the greatest player in Grand Slam history as he beat Andy Roddick in five dramatic sets for a sixth Wimbledon and 15th major title.

"This is not why I'm playing tennis, to break records, and this doesn't mean I'm going to stop playing tennis. I hope to come back for many years." True words from true champion.

I hope his count won't stop at 15.