Saturday, November 19, 2005
Friends across faiths
Just one diya
Friday, November 18, 2005
Sob Story
- In healthy eyes, the cornea is continually kept wet and nourished by basal tears.
- The second type of tears is reflex tears that attempt to wash out irritants that may have gotten into the eye.
- The third category, emotional tears, is increased lacrimation due to strong emotional stress or pain. Tears brought about by emotions have a different chemical make-up than those for lubrication.
A logic beyond science?
GAUTAM CHIKERMANE
Thursday, November 17, 2005
Garibaldi and Nehru
Monday, November 14, 2005
On Considering the Source
Wednesday, November 09, 2005
Yehi Hai Right Size, Baby
Saturday, October 29, 2005
The Search and the Find
Friday, October 28, 2005
The Moment of Complexity
"The Moment of Complexity is a profoundly original work. In remarkable and insightful ways, Mark Taylor traces an entirely new way to view the evolution of our culture, detailing how information theory and the scientific concept of complexity can be used to understand recent developments in the arts and humanities. This book will ultimately be seen as a classic."-John L. Casti, Santa Fe Institute, author of Gödel: A Life of Logic, the Mind, and Mathematics
Leaves of a Pipal Tree
Monday, October 24, 2005
Towards the Black Void
Friday, October 14, 2005
Divinity in a stone
The Indian Express
Sunday, October 09, 2005
Thursday, October 13, 2005
Game theory
The Economic times
THURSDAY, OCTOBER 13, 2005
(The author is professor, Indian Statistical Institute, New Delhi)
Tuesday, October 04, 2005
String theory
The Hindustan Times October 2, 2005
The new idea was to assume that the basic entity was a string, not a point particle. The string could virate in different ways, just like a sitar string does.The different resulting notes are the different kinds of particles, electrons, photons etc. There are six extra dimentions in string theory. These are believed to be curled up in small size, so that they have not been observed yet. A beatiful feature of string theory is that its differnt facets are closely tied together in tight logical consistency, so that progress in any area leads to ramifications for the whole subject.
Saturday, October 01, 2005
Remote Viewers
Every breath you take is a creative act. The molecules in the air are random and chaotic. If they happen to enter into your body, they magically acquire a purpose and an identity. Could any act be more creative?
Consider what happens to a single oxygen atom as you breathe it in. within a few thousandths of a second it passes through the moist, nearly transparent membranes of the lungs. It immediately attaches itself to the haemoglobin inside one of your red blood cells. In an instant, a remarkable transformation occurs. The blood cell changes colour, from the dark blue-black of oxygen starved haemoglobin to the bright red of an oxygen rich haemoglobin, and a stray atom of air suddenly becomes YOU. It has crossed the invisible boundary dividing you from the rest of the universe.
Each of us is balanced between the infinite and the infinitesimal. The same protons found in the hearts of stars, which have lived at least 5 billion years, take up residence inside us. The neutrinos that streak through earth in a few billionths of a second are part of us for a brief instant, too…Remember that you are a flowing river of atoms and molecules collected from every corner of the cosmos. You are an outcropping of energy whose waves extend to the edges of the unified field.Deepak Chopra
It might not be so incredible to declare that the compositions of all 6 billion human beings as well as the thousands of other species on Earth are, in fact, indistinguishably intertwined, making us soulmates in more ways than one.
Consider this: When a bacterium, weed, starfish, peacock, dog, cat or human dies, decomposition sets in. in the process, the atoms that constitute the body are released into the atmosphere, and they mingle freely, getting interspersed over wide geographical areas. Some might get reconstituted in a short period of time, becoming a part of another, or the same species. Other atoms continue to free float indefinitely, may be for years or even decades, before they submit to another composition. That makes us all parts of one indistinguishable whole, with each having at least some of the ingredients of the other.
Bill Bryson in A Short History of Everything talks about the pervasive nature of atoms:
Atoms are fantastically durable. Because they are so long-lived, atoms really get around. Every atom you possess has almost certainly passed through several stars and been part of millions of organisms on its way to becoming you. We are each atomically so numerous and so vigorously recycled at death that a significant number of atoms – up to billion for each of us, it has been suggested – probably once belonged to Shakespeare. A billion more each came from Buddha and Ghenghis Khan and Beethoven, and any other historical figure you care to name… so we are all reincarnations – though short-lived ones. When we die, our atoms will disassemble and move off to find new uses elsewhere – as part of a leaf or other human beings or drop of dew. Atoms themselves, however, go on practically for ever.Jahanavi Shandilya
Not only that, they were also exactly in one and the same place – the initial singularity; the primordial atom. Nor could they have been anywhere else since there was no other time or place to be in. Then again, we’re connected in another way too. Consider the air we breathe. It’s just matter in a gaseous form consisting of 78% nitrogen, 21% oxygen, less than one per cent carbon dioxide, some water vapour, dust and pollutants and trace amounts of various elements.
In fact, nothing could be dissimilar to ourselves. Yet once this air enters our lungs it oxygenates the blood, which nourishes the tissues, and once it leaves the lungs it carries away all the carbon dioxide wastes taken from the tissues. It’s safe to say the air around us not only becomes part of us continuously but contains a part of us in it as well all the time. That’s how connected we are.Mukul Sharma
The uncertainty principle implies that particles can come into existence for short periods of time even when there is not enough energy to create them. In fact, they are created from uncertainties in energy. One could say that they briefly borrow the energy required for their creation, and then, a short time later, they pay the debt back and disappear again. Since these particles do not have a permanent existence they are called virtual particles. And even though we can’t see them, we know that these particles are really there in empty space because they leave a detectable trace of their activities that have been very accurately measured and described.Mukul Sharma
That Famous Equation and You
The New York Times
September 30, 2005
Brian Greene, a professor of physics and mathematics at Columbia, is the author of "The Elegant Universe" and "The Fabric of the Cosmos."
Thursday, September 15, 2005
The Anthropic Principle
In The Hitchhikers Guide to the Galaxy, the Deep Thought computer announced that the answer to the ultimate question of life, the universe and everything was 42. Contemporary physicists are finding themselves just as frustrated as the hyperintelligent race of beings who built Deep Thought after discovering that the ultimate answer to their questions turns out to be a set of meaningless numbers. Many scientists conclude that the answers are contingent on biology and the facts of life. Imagine if the values of one or two of nature's fundamental constants were slightly different, say the strengths of forces that hold atoms together. One consequence might be that the Earth's oceans would regularly freeze. Water — essential for life — is unique in being lighter as a solid than as a liquid. So ice sheets float and form an insulating layer that stops the deeper waters freezing. If water was more conventional then the primordial oceans would never have stayed liquid for long enough for life to evolve. But then of course we would not be here to ponder our good fortune.
This is the point of the anthropic principle, which starts from the fact of our existence and then argues backwards to claim that the precise properties of the universe that emerged from the big bang had to be those that made the eventual emergence of humans inevitable. The unique properties of water depend on an exquisite level of fine-tuning of the fundamental constants. So why are these constants just right? Because if they weren't we wouldn't be here. There are lots of other fine tunings. Carbon, also essential for life, is made in stars by the fusion of three helium atoms. It is only due to an extraordinary "coincidence" in the resonant energies of helium, beryllium, and carbon that stars make lots of carbon. Change the resonant energy by just 0.0001 per cent and no carbon. Proponents of the anthropic principle claim it is pointless looking for theoretical explanations for the precise values of the fundamental constants; they are what they are because if they weren't we wouldn't be here. Opponents claim that the principle betrays a lack of imagination for assuming that other forms of life wouldn't be possible. But this is harder to sustain when considering some of the more cosmic consequences of tweaking the constants. If the weak force that binds atomic nuclei had been just a bit weaker, all hydrogen would have turned to helium without making any of the heavier elements. If the strong force had been a bit stronger, the universe would not even have had any atoms.
New research is making even the sceptics grudgingly accept the anthropic principle. A paper by Mario Livio and Martin Rees, the astronomer royal, explores the value of the cosmological constant, a measure of how much energy is contained in empty space. Without this value being tweaked to an extraordinary level of precision, the universe would be filled only with huge black holes or entirely empty of stars. But who's doing the tweaking? Another reason scientists are wary is that it seems to reverse the Copernican revolution and place humankind at the centre of the universe. Even worse, it could allow creationists to bring the G word back into science: a God to tweak all those knobs to make life possible. But if God is needed to tweak the universe's knobs then who was there to tweak God's knobs? Physicists such as Martin Rees and Stephen Hawking prefer another scenario whereby an infinite number of universes exist, each with different values of the fundamental constants. In just a few of them the constants have taken on the right values for the creation of stars, life and evolution.
For a biologist like me the anthropic principle has a persuasive charm. Physicists have long claimed that biology reduces to chemistry and chemistry reduces to physics. But now physics reduces to biology! To explain the values of the fundamental constants physicists have to look not at their equations but at the structure of the eye or the brain or the building blocks of life. Who knows which fundamental constants take their value from the fact that fish had to propel themselves through water before evolving into intelligent tetrapods like us. Biology explains everything.
© Guardian Newspapers Limited 2004
(The writer is a professor of molecular genetics at the University of Surrey and the author of Quantum Evolution.)
Friday, August 12, 2005
Incorrect reading of religious texts
Human beings, in nearly all cultures, have long engaged in a rather strange activity. They have taken a literary text, given it special status and attempted to live according to its precepts. These texts are usually of considerable antiquity yet they are expected to throw light on situations that their authors could not have imagined. In times of crisis, people turn to their scriptures with renewed zest and, with much creative ingenuity, compel them to speak to their current predicament. We are seeing a great deal of scriptural activity at the moment. This is ironic, because the concept of scripture has become problematic in the modern period. The Scopes trial of 1925, when Christian fundamentalists in the United States tried to ban the teaching of evolution in the public schools, and the more recent affair of The Satanic Verses, both reveal deep-rooted anxiety about the nature of revelation and the integrity of sacred texts. People talk confidently about scripture, but it is not clear that even the most ardent religious practitioners really know what it is.
Protestant fundamentalists, for example, claim that they read the Bible in the same way as the early Christians, but their belief that it is literally true in every detail is a recent innovation, formulated for the first time in the late 19th century. Before the modern period, Jews, Christians, and Muslims all relished highly allegorical interpretations of scripture. The word of God was infinite and could not be tied down to a single interpretation. Preoccupation with literal truth is a product of the scientific revolution, when reason achieved such spectacular results that mythology was no longer regarded as a valid path to knowledge. We tend now to read our scriptures for accurate information, so that the Bible, for example, becomes a holy encyclopaedia, in which the faithful look up facts about God. Many assume that if the scriptures are not historically and scientifically correct, they cannot be true at all. But this was not how scripture was originally conceived. All the verses of the Qur'an, for example, are called "parables" (ayat); its images of paradise, hell, and the last judgment are also ayat, pointers to transcendent realities that we can only glimpse through signs and symbols. We distort our scriptures if we read them in an exclusively literal sense. There has recently been much discussion about the way Muslim terrorists interpret the Qur'an. Does the Qur'an really instruct Muslims to slay unbelievers wherever they find them? Does it promise the suicide bomber instant paradise and 70 virgins? If so, Islam is clearly chronically prone to terrorism. These debates have often been confused by an inadequate understanding of the way scripture works. People do not robotically obey every single edict of their sacred texts. If they did, the world would be full of Christians who love their enemies and turn the other cheek when attacked. There are political reasons why a tiny minority of Muslims are turning to terrorism, which have nothing to do with Islam. But because of the way people read their scriptures these days, once a terrorist has decided to blow up a London bus, he can probably find scriptural texts that seem to endorse his action.
Part of the problem is that we are now reading our scriptures instead of listening to them. When, for example, Christian fundamentalists argue about the Bible, they hurl texts back and forth competitively, citing chapter and verse in a kind of spiritual tennis match. But this detailed familiarity with the Bible was impossible before the modern invention of printing made it feasible for everybody to own a copy and before widespread literacy — an essentially modern phenomenon — enabled them to read it for themselves. Hitherto the scriptures had always been transmitted orally, in a ritual context that, like a great theatrical production, put them in a special frame of mind. Christians heard extracts of the Bible chanted during the mass; they could not pick and choose their favourite texts. In India, young Hindu men studied the Vedas for years with their guru, adopting a self-effacing and non-violent lifestyle that was meant to influence their understanding of the texts. In Judaism, the process of studying Torah and Talmud with a rabbi was itself a transformative experience that was just as important as the content. The last thing anyone should attempt is to read the Qur'an straight through from cover to cover, because it was designed to be recited aloud. Indeed, the word qur'an means "recitation." Much of the meaning is derived from sound patterns that link one passage with another, so that Muslims who hear extracts chanted aloud thousands of times in the course of a lifetime acquire a tacit understanding that one teaching is always qualified and supplemented by other texts, and cannot be seen in isolation. The words that they hear again and again are not "holy war," but "kindness," "courtesy," "peace," "justice," and "compassion."
Historians have noted that the shift from oral to written scripture often results in strident, misplaced certainty. Reading gives people the impression that they have an immediate grasp of their scripture; they are not compelled by a teacher to appreciate its complexity. Without the aesthetic and ethical disciplines of ritual, they can approach a text in a purely cerebral fashion, missing the emotive and therapeutic aspects of its stories and instructions. Solitary reading also enables people to read their scriptures too selectively, focussing on isolated texts that they read out of context, and ignoring others that do not chime with their own predilections. Religious militants who read their scriptures in this way often distort the tradition they are trying to defend. Christian fundamentalists concentrate on the aggressive Book of Revelation and pay no attention to the Sermon on the Mount, while Muslim extremists rely on the more belligerent passages of the Qur'an and overlook its oft-repeated instructions to leave vengeance to God and make peace with the enemy.
We cannot turn the clock back. Most of us are accustomed to acquiring information instantly at the click of a mouse, and have neither the talent nor the patience for the disciplines that characterised pre-modern interpretation. But we can counter the dangerous tendency to selective reading of sacred texts. The Qur'an insists that its teaching must be understood "in full" (20:114), an important principle that religious teachers must impart to the disaffected young. Muslim extremists have given the jihad (which they interpret reductively as "holy war") a centrality that it never had before and have thus redefined the meaning of Islam for many non-Muslims. But in this they are often unwittingly aided by the media, who also concentrate obsessively on the more aggressive verses of the Qur'an, without fully appreciating how these are qualified by the text as a whole. We must all — the religious and the sceptics alike — become aware that there is more to scripture than meets the cursory eye.
© Guardian Newspapers Limited 2004
(Karen Armstrong is the author of The Battle for God: A History of Fundamentalism.)
Tuesday, July 19, 2005
Incompleteness & the Goedelian way
Einstein and Goedel had precisely the opposite perspective. Both fled the Nazis, both ended up in Princeton, New Jersey, at the Institute for Advanced Study, and both objected to notions of relativism and incompleteness outside their work. They fled the politically absolute, but believed in its scientific possibility. Einstein's convictions are fairly well known. He objected to quantum physics and its probabilistic clouds. God, he famously asserted, does not play dice. Also, he believed, not everything depends on the perspective of the observer. Relativity doesn't imply relativism. The conservative beliefs of an aging revolutionary? Perhaps, but Einstein really was a kind of Platonist: he paid tribute to science's liberating ability to understand what he called the "extra-personal world."
And Goedel? Most lay readers probably know of him from Douglas R. Hofstadter's playful best-seller, Goedel, Escher, Bach, a book that is more about the powers of self-referentiality than about the limits of knowledge. Goldstein's interpretation differs in some respects from that of another recent book about Goedel, A World Without Time: The Forgotten Legacy of Goedel and Einstein by Palle Yourgrau (Basic), which sees him as more of an iconoclastic visionary. But in both he is portrayed as someone widely misunderstood, with good reason perhaps, given his work's difficulty. Before Goedel's incompleteness theorem was published in 1931, it was believed that not only was everything proven by mathematics true, but also that within its conceptual universe everything true could be proven. Mathematics is thus complete: nothing true is beyond its reach. Goedel shattered that dream. He showed that there were true statements in certain mathematical systems that could not be proven. And he did this with astonishing sleight of hand, producing a mathematical assertion both true and unprovable. The theorem has generally been understood negatively because it asserts that there are limits to mathematics' powers. It shows that certain formal systems cannot accomplish what their creators hoped. But what if the theorem is interpreted to reveal something positive: not proving a limitation but disclosing a possibility? Late in his life Goedel said of mathematics: "It is given to us in its entirety and does not change, unlike the Milky Way. That part of it of which we have a perfect view seems beautiful, suggesting harmony." That beauty, he proposed, would be mirrored by the world itself. These are not exactly the views of an acolyte devoted to Relativity, Incompleteness and Uncertainty. And Einstein was his fellow dissenter.
Religions as works of art
Not believing in God is no excuse for being virulently anti-religious or naively pro-science.
Isn't it about time that atheists tried to imagine what some other forms of atheism might look like? Not in the hope of replacing one orthodoxy with another, but simply in order to challenge other atheists to imagine still more ways of being non-religious — to encourage them to construct their own forms of atheism, rather than buying a ready-made version off the shelf. Atheism should be more like a set of Lego blocks than a pre-assembled toy. The challenge and the opportunity it offers is that of constructing one's own personal philosophy of life, a philosophy that is not put together according to any set of instructions handed down from on high. As a way of kicking off the debate, let me outline my own variety. It would be a travesty if I were to pretend that this is the only worthwhile kind. But I think it is more appropriate for the 21st century.
When I say that I value religion, I do not mean that I see any truth in the stories about gods, devils, souls and saviours. But I do think there is one respect in which religion is more truthful than science — in its depiction of the longing for transcendent meaning that lies in man's heart. No scientific theory has ever done justice to this longing, and in this respect religions paint more faithful pictures of the human mind. My atheism sees religions as presenting potent metaphors and images to represent human aspirations for transcendence. Here is a parable to explain what I mean: once upon a time, a talented artist painted a picture of a beautiful landscape on the wall of his house. People came from all around to see the picture. It was so beautiful that they would spend whole days staring at it.
Led on by wishful thinking, some people even began to forget that they were looking at a painting, and came to believe that the wall was a window. So the artist removed one of the bricks in the wall, allowing the illusory nature of the painting to become clear. Some of those who had mistaken the painting for reality were upset to have their illusion shattered. But the wise ones thanked the artist profusely. "By revealing the fictitious nature of this landscape," they said, "you have allowed us to appreciate the beauty of your art." I think the best way to think about religion is to see it like the painting in this parable. Religions are beautiful things, but their beauty can only be truly appreciated when they are seen as human creations — as works of art. Atheists who attack religions for painting a false picture of the world are as unsophisticated and immature as religious believers, who mistake the picture for reality. The only mature attitude to religion is to see it for what it is — a kind of art, which only a child could mistake for reality, and which only a child would reject for being false.
Tuesday, July 12, 2005
Finding Design in Nature
CHRISTOPH SCHÖNBORN |
Friday, July 08, 2005
Walking points
[ TOI.Ed 3: thursday, october 18, 2001 ]
http://timesofindia.indiatimes.com/articleshow/1566755718.cms