Unruled Notebook

Entries from October 2008

rumours@edu

October 31, 2008 · Leave a Comment


(click on image to see more cartoons at this site…)

Categories: Cartoons
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Twinkle Twinkle

October 31, 2008 · Leave a Comment

The first Carnatic ragam is vasanthA; the second is kEdAra goWlai; the third eludes me, before it goes into balle balle…

Performed by Revathi Sankaran, a multi-talented woman.

When she was at the helm some time back, the women’s magazine Mangayar Malar took a positive sheen lifting the face of Women in India. Once she moved out of the editor office, the mag now has reverted safely to supplying recipes for tasty tamarind fever (er, puli kaachal literally translated into English…)

Categories: Asides · Carnatic Music
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If your child has diarrhea, what do you do?

October 30, 2008 · Leave a Comment

If your child has diarrhea, what do you do: 1) increase her fluid intake 2) reduce it or 3) keep it the same?

That is the question for which (an unknown but possibly representative sample of) Indian population who chose option 2) is given in the picture below

[From Breaking Out of the Pocket by Peter Boone & Simon Johnson, Brookings Global Economy and Development Conference]

From "Breaking Out of the Pocket" by Peter Boone and Simon Johnson, Brookings Global Economy and Development Conference


To quote from the Edge Master Class lecture where the above picture is discussed

[...] Diarrhea is not a new problem. It’s an old problem that’s been there for generations. The idea that whether you should give more or less fluids is a problem that’s been there for thousands of years.

It’s interesting—and India is no exception, I can show you video from other countries—but it’s interesting, the mental model the world has settled on is a mental model that suggests that when your child has diarrhea give them less fluids—even though that mental model is exactly wrong and you’ve had strong feedback.[...]

For diarrhea, the correct answer is option 1). One should increase the fluid intake to prevent dehydration that could arise due to excessive loss of body fluids due to diarrhea. Also, increasing the fluid intake – most of which would anyway would come out – would increase the chance for flushing the infection out from the stomach.

Kerala, scores well because it is one of the most literate states? Need not be. It is also one of the lesser populated states. And the correct answer may just be told as a thing to remember (through education) rather than gleaned from observation and intuition – which could become wrong, as shown in the answers from some of the most populated states.

Categories: Information · Micro Muse
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Schlieren, Ares V and Coughing

October 30, 2008 · 2 Comments

We don’t get to see directly with our eye, shock waves arising in air or shimmers of hot air. Or invisible gas leak, or coughing or air flow around a dog sniff. For the shimmer to be visible, we need that region of air to be ‘contrasted’ with something in the background. In the case of a shock wave in air (which is basically a compression wave front sustaining a large pressure discontinuity across it), we need to look at its shadow.

A standard technique that aerospace and mechanical engineers use to picture the shadow is the shadowgraph or the Schlieren photography [the two links to Wikipedia pages provide enough history and basic information about these techniques that I am not repeating here].
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Categories: Fluid Sciences · Science Notes
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Paper Read List Oct 2008

October 29, 2008 · Leave a Comment

If your research interests doesn’t involve convection, fluid flow, porous media, bio-heat transport, this may not be of interest to you.
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Categories: Fluid Sciences · Read List · Research Notes · Thermal Sciences
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