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Vice Provost Debra Humphris and Student Union president David Goldsmith discuss the National Student Survey results on the latest Imperial Podcast.

We also hear about a Nasa project to demonstrate how pressure from sunlight can power a spacecraft, and visit the Energy Futures Lab to discover new ways of powering motorbikes and guitar amps.

The podcast is presented by Gareth Mitchell, a lecturer on Imperial's Science Communication MSc course and the presenter of , with contributors from the Communications and Public Affairs Division.

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- Gastric bypass surgery has surprising effects on the brain and Imperial researchers contemplate how to help crops thrive without nitrogen fertiliser.

- Vice Provost Debra Humphris and Student Union president David Goldsmith discuss the National Student Survey results, which showed an overall satisfaction rating of 86 per cent.

– Rosemary Peters visits the Energy Futures Lab to see how ÌìÃÀ´«Ã½ are using hydrogen fuel cells to power guitar amps and building powerful electric vehicles.

– (Physics) explains how Nasa are planning to launch a spacecraft propelled by solar pressure.