full transcript
From the Ted Talk by Aaswath Raman: How we can turn the cold of outer space into a renewable resource
Unscramble the Blue Letters
When I came across all of this, it was towards the end of my PhD at Stanford. And I was amazed by its apparent simplicity as a cooling method, yet really puzzled. Why aren't we making use of this? Now, ssitntcies and engineers had investigated this idea in previous dcaeeds. But there tnured out to be at least one big problem. It was cleald night-sky cooling for a reason. Why? Well, it's a little thing called the sun. So, for the surface that's doing the cooling, it needs to be able to face the sky. And during the middle of the day, when we might want something cold the most, unfortunately, that means you're going to look up to the sun. And the sun haets most materials up enough to completely coteancrut this cooling effect.
Open Cloze
When I came across all of this, it was towards the end of my PhD at Stanford. And I was amazed by its apparent simplicity as a cooling method, yet really puzzled. Why aren't we making use of this? Now, __________ and engineers had investigated this idea in previous _______. But there ______ out to be at least one big problem. It was ______ night-sky cooling for a reason. Why? Well, it's a little thing called the sun. So, for the surface that's doing the cooling, it needs to be able to face the sky. And during the middle of the day, when we might want something cold the most, unfortunately, that means you're going to look up to the sun. And the sun _____ most materials up enough to completely __________ this cooling effect.
Solution
- called
- counteract
- heats
- turned
- decades
- scientists
Original Text
When I came across all of this, it was towards the end of my PhD at Stanford. And I was amazed by its apparent simplicity as a cooling method, yet really puzzled. Why aren't we making use of this? Now, scientists and engineers had investigated this idea in previous decades. But there turned out to be at least one big problem. It was called night-sky cooling for a reason. Why? Well, it's a little thing called the sun. So, for the surface that's doing the cooling, it needs to be able to face the sky. And during the middle of the day, when we might want something cold the most, unfortunately, that means you're going to look up to the sun. And the sun heats most materials up enough to completely counteract this cooling effect.
Frequently Occurring Word Combinations
ngrams of length 2
| collocation |
frequency |
| cooling systems |
4 |
| cooling system |
4 |
| air temperature |
4 |
| degrees celsius |
3 |
| greenhouse gas |
3 |
| degrees fahrenheit |
2 |
| air conditioner |
2 |
| refrigeration systems |
2 |
| gas emissions |
2 |
| climate change |
2 |
| thermal radiation |
2 |
| infrared light |
2 |
| cooling effect |
2 |
| length scales |
2 |
| save energy |
2 |
| cold darkness |
2 |
| solar cells |
2 |
ngrams of length 3
| collocation |
frequency |
| greenhouse gas emissions |
2 |
Important Words
- amazed
- apparent
- big
- called
- cold
- completely
- cooling
- counteract
- day
- decades
- effect
- engineers
- face
- heats
- idea
- investigated
- making
- materials
- means
- method
- middle
- phd
- previous
- problem
- puzzled
- reason
- scientists
- simplicity
- sky
- stanford
- sun
- surface
- turned