Archive for the ‘Environment’ Category

Arc length of a spiral around a paraboloid

paraboloid spiral
What is the length of a spiral around a paraboloid? This is an interesting application of integral calculus, involving an environmentally friendly cooker design.

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Friday math movie: The beautiful math of coral (and crochet)

The math of coralHow do we get the message out about saving corals from destruction? Here’s one way involving community crochet.

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Math of air pollution

Haze covers SingaporeHow do we compare pollution caused by different substances and give meaningful health advisories? Singapore’s current haze season gives an example.

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Prime numbered cicadas

Magicicada
The 17-year cicada is due to emerge in north-eastern parts of USA in Spring 2013.

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How do noise canceling headphones work?

noise canceling
How can we enjoy music while traveling on noisy public transport? What is the math behind noise canceling headphones?

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Modeling fish stocks

Atlantic cod
How can we use math to save collapsing fish stocks? Mathematical modeling is the key.

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Friday math movie: Carlo Ratti Architecture that senses and responds

data feedback
This video shows how we can improve our lives using sensing data.

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7 billion people next week

crowd scene
There will soon be 7 billion of us. How can the world sustain population growth on this scale? Do you know how many people there are in the world right now?

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Singapore’s food vulnerability

Food
Today is World Food Day. Here’s how one country plans to improve its precarious food situation.

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13 yr-old designs efficient solar collectors using Fibonacci sequence and trees

Tree based solar collector
Here’s a useful discovery by a 13 yr-old, using math and good observation skills.

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