I am a mechanical（机械的） engineering professor at the University of Pennsylvania（宾夕法尼亚州（美国州名）） and my favorite hobby is photography. As I travel around the world, I love taking photographs like these pictures, so I can remember all the beautiful and interesting things that I've seen. But what I can't do is record and share how these objects feel to touch. And that's kind of surprising because your sense of touch is really important. It's involved in every physical interaction（相互作用） you do every day, every manipulation（操纵） task, anything you do in the world. And so the sense of touch is actually pretty interesting.

  It has two main components（成分）. The first is tactile（触觉的） sensations（感觉）, things you feel in your skin, and the second is kinesthetic sensations. And this has to do with the position of your body and how it's moving and the forces you encounter（遭遇）. And you're really good at incorporating（包含） both of these types of sensations（感觉） together to understand the physical interactions（相互作用） you have with the world and understand as you touch a surface, is it a rock, is it a cat, is it a bunny, what is it? And so as an engineer, I'm really fascinated（兴奋的） and I have a lot of respect for how good people are with their hands, and I'm intrigued and curious（好奇的） about whether we could make technology better by doing a better job at leveraging the human capability（才能） with a sense of touch. Can I improve the interfaces（界面） to computers and machines by letting you take advantage of your hands?

  And indeed, I think we can, and that's at the core（果实的心） of a field called haptics, and this is the area that I work in. It's all about interactive（ 交互式的） touch technology. And the way it works is if you move your body through the world, if as an engineer I can make a system that can measure that motion（运动） and then present to you sensations（感觉） over time that kind of make sense that match up with what you might feel in the real world, I can fool you into thinking you're touching something even though there's nothing there. All right, so here are three examples, and these are all done from research in my lab at Penn. The first one is all about that same problem that I was showing. How can we capture（捕获） how objects feel and recreate（娱乐） those experiences?

  And so the way we solve this problem is by creating a handheld tool that has many different sensors（传感器） inside.