Tag Archive 'physics'

Jul 31 2008

time quotes from an old notebook

Published by dianawidjaja under Uncategorized

Does anybody know what time it is? - Chicago
Your “now” is not my “now” - Charles Lamb, 1817
Time is just like another direction in space - Stephen Hawking, 1990
What I’m really interested in is whether God could have made the world in a
different way; that is, whether the necessity of logical simplicity leaves any
freedom at all. - Albert Einstein
We could imagine a world in which causality does not lead to a consistent order of
earlier and later. In such a world the past and the future would not be irrevocably
separated, but could come together in the same present. And we could meet our
former selves of several years ago and talk to them. However, it is an empirical
fact that our world is not this type. Time order reflects the casual order of the
Universe. - Hans Reichenbach, The Rise of Scientific Philosophy, 1951
What then is time? If someone asks me, I know. If I wish to explain it to someone
who asks, I know not. - Aurelius Augustinus, Bishop of Hippo in N. Africa
Neither past nor future can be changed, they could only be discovered.
-Paul Anderson, Past Times
How can the past and future be when the past no longer is and the future is not yet?
As for the present, if it were always the present and never moved on to become the
past, it would not be time but eternity. - Augustine
You are so part of the world that your slightest action contributes to its reality.
Your breath changes the atmosphere. Your encounters with others alter the fabrics
of their lives, and the lives of those who come in contact with them.
- Jane Roberts

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Jan 26 2008

meaning of life

Published by dianawidjaja under morality

Wired, Issue 16.02

Morality, spirituality, the meaning of life — science doesn’t handle those issues well at all. But that’s cool. We have art and religion for that stuff. Science also assumes predictable cause and effect in a world that’s a chaotic, bubbling stew of randomness. But that’s OK, too. Our approximations are usually good enough. No, the real reason science sucks is that it makes us look bad. It makes us bit players in the Big Story of the universe, and it exposes some key limitations of the human brain.
Look at it this way: Before science, we humans had dominion over Earth, the center of the universe. Now we’re just a bunch of hairless apes on a wet rock orbiting a minor star in a marginal galaxy.
Even worse, those same cortexes that invented science can’t really embrace it. Science describes the world with numbers (ratio of circumference to diameter: pi) and abstractions (particles! waves! particles!). But our intractable brains evolved on a diet of campfire tales. Fantastical explanations (angry gods hurling lightning bolts) and rare events with dramatic outcomes (saber-toothed tiger attacks) make more of an impact on us than statistical norms. Evolution gave us brains that crave certainty, with irrational fears of crashing in an airplane and a built-in weakness for just-so stories about intelligent design. Meanwhile, the true wonders revealed by the scientific method — species that change into new species over time, continents that float around the planet, a quantum-mechanical world where nothing is for sure — are worse than counterintuitive. To a depressingly large number of us, they’re downright threatening.
In other words, thanks to evolution, half of all Americans don’t believe in evolution. That’s the universe for you: impersonal, uncaring, and ironic.

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Dec 28 2007

math in nature

Published by dianawidjaja under nature

I came across an article on Wired magazine (16.01) titled The Software That Will Take Digital F/X to the Next Level of Awesome, relaying how Jos Stam, a computer scientist specializing in 3-D graphics who loves complex problems, view “reality [as] a binary riddle to be cracked, a series of fleeting images best appreciated after they’ve been rendered into 1s and 0s”. He has already devised an algorithm that models digital smoke with astounding realism (used in Lord of the Rings and War of the Worlds) and is currently working on daunting problems involving the interactions of objects and forces, which if successful would be “the holy grail of computer animation”. He wants “software that can play God with pixels”.

The article certainly affirms my belief that nature is innately governed by mathematics, as there seems to be mathematics and numbers in every aspects of the world, think golden ratio which is embedded in arts and nature. I am ceaselessly fascinated by the fact that nature can be accurately modeled by the complex dynamics of mathematics, attempting for example to mimic how elements interact in the real world at a fundamental level such as smoke with wind or solid objects with fabrics.

Paul Dirac, a Nobel Laureate in Physics in 1933, said that “one could perhaps describe the situation by saying that God is a mathematician of a very high order, and He used very advanced mathematics in constructing the universe. Our feeble attempts at mathematics enable us to understand a bit of the universe, and as we proceed to develop higher and higher mathematics we can hope to understand the universe better”.

We may wonder, for example, why all the phenomena encompassed by electromagnetism, from the behavior of electrons to the nature of light, can be explained by a set of four differential equations known as Maxwell’s equations. Equally puzzling is the fact that some geometrical curves like the ellipse, invented/discovered by the Greek mathematician Menaechmus around 350 BC, were found 2,000 years later to describe the orbits of planets around the Sun. Similarly, group theory proved to be essential in the understanding of both the organization of elementary (subatomic) particles, and the structure of solids. What is it that makes mathematics fit the observable universe like a glove?

- Mario Livio, author of The Golden Ratio: The Story of Phi

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Oct 05 2007

order

Published by dianawidjaja under days of my life

Sometimes I marvel at the orderliness of our universe. The sun and moon in their uninterrupted cycle of day and night assure us of a new dawn and providing us a closure for today. The seasonal changes endow us with an excitement of a new cycle of beginnings and ends. A cascade of stars that glisten in the heavens imbues us with the mystery of our existence. And then, there’s the Physics and Mathematical laws that govern the realms of reality, that is the very fundamental cause for our existence. Life might not even be possible without gravity to begin with. Nature signs on its creations with the Golden ratio , which permeates the foundations of our observable environment.

The orderliness of the universe fascinates me as much as when I observed the locals in Japan standing on the left side of the escalator, all cases without exceptions. The proof to that is I still recall it so vividly even after 5 years. Order in society…something we cannot do without, although I’d say that with the case of the escalator, that would make us quite a rigid and inflexible bunch.

Beneath this seemingly pristine facade lies an intricate web of complexity, woven into the very blueprint of our existence.

And of course , underneath it all is the orderliness of my own life, which I sometimes describe as mundane and routine, except with the unpredictable occasional changes which soon enough become inevitably prosaic. I crave for order, the safety net I can fall back to, especially when life gets a little too messy for my liking.

For the first time, I am encountering a broken water heater at my apartment. Before that is replaced, the apartment manager suggested we use Apt 411’s bathroom, since it’s still vacant. Now that is definitely not a common occurrence in my ordinal life, is it? Tomorrow morning I’ll feel a wave of freshness sweep over me as I waltz into the vacant Apt 411 just to use the shower.

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