Iowa City native and Penn physicists tout topological insulators
Iowa City native Charles Kane and University of Pennsylvania physicist Eugene Mele discuss topological insulators a new material class that could reduce computer heat and boost battery life. They explain electrons move without backscattering like a divided highway. Kane grew up in Iowa City and earned physics degrees at Chicago and MIT.
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Twitter growth in ads slows as advertisers hesitate
Reuters reports Twitter Inc. faces slower revenue and user growth, signaling advertiser hesitation. Shares dropped 5.2 percent after April growth hints and first quarter results error. brokerages trimmed targets with Barclays and Jefferies weighing in. Analysts cite an ROI wall and delayed impact from new ad products.
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