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Vi Hart at Gel 2011

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Mathematical constraints can help create beautiful music. Two minutes in you'll hear Vi Hart's "self referential string quartet" in which each instrument plays its own name - using the binary representation of the ASC...

Marc Salem at Gel 2006

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Marc focuses on "how the mind creates reality and meaning." Chiefly by observing non-verbal communication, Marc is able to distinguish truth from falsehood in a very engaging exercise with audience members.

Sal Khan at Gel 2010 (founder, the Khan Academy)

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What started as algebra lessons for his cousins has turned into a world-changing project. Hundreds of thousands of users worldwide have benefited from Sal Khan's friendly, accessible Youtube videos explaining math, sc...

Alex Lee at Gel 2008

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If you spend any time in the kitchen, you're likely to use an Oxo product regularly - an apple corer, vegetable peeler, whisk, or the ever-popular salad spinner. Oxo is practically the definition of "good experience" ...

Bridget Duffy at Gel 2008

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Creating a good patient experience is the focus and mandate of the Chief Experience Officer at the Cleveland Clinic, one of the world's top-rated medical facilities. In this talk, Bridget Duffy shows the theory and pr...

Seth Godin at Gel 2006

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Why are so many things broken? In this entertaining talk - one of the favorites of Gel 2006 - Seth Godin gives a tour of things poorly designed, the reasons why they are that way, and how to fix them.