Building smarter, more humane cities is the aim of all of our guests this week on Smart City.

Greg Fuson and Sandra Kulli are the people behind The Vine, an annual west coast gathering of creative architects, builders, thinkers and artists. Their topic at this year's Vine Conference is the nature of community.

We'll also speak with Ruth Otte and Clifford Young. Together they've produced an invaluable survey for urban enthusiasts that uncovers what people around the world like and dislike about their cities. Cliff is Senior Vice President for Ipsos Public Affairs and Ruth is the Executive Vice President of Marketing and Communications for Veolia Transportation.