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  3. Two new gesture-sensing innovations designed for large electronic screens in public places herald(预告)a future in which everythin

Two new gesture-sensing innovations designed for large electronic screens in public places herald(预告)a future in which everythin

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问题     Two new gesture-sensing innovations designed for large electronic screens in public places herald(预告)a future in which everything from street art to advertisements track your movements, are fully interactive, and almost impossible to ignore.
    Giant flat-screen displays powered by organic LEDs(OLEDs)are plunging in price, so screens tens of meters long could soon line urban corridors. Rather than have them simply fire messages at a tuned-out public, researchers at the Technical University of Berlin(TUB)in Germany have built two applications that they hope will attract passers-by and inspire a new wave of interactive displays.
    "We believe that in the future all surfaces in urban areas could be interactive displays," says team member Robert Walter. " This presents great opportunities and challenges as it will need to be attractive and work in an intelligent way. " The researchers will reveal their first two street-smart applications—StrikeAPose and Screenfinity—next month in Paris, France. They believe that while advertising could provide the impetus(推动)for the adoption of the technology, non-commercial apps will also appear—courtesy of artists or poets, perhaps.
    StrikeAPose, developed by Walter’s team, lets a person in the street perform a unique gesture to take control of anything from a bus-shelter advertisement screen to a large, Times-Square-style video wall. Once you are registered as the screen controller, software fed by the depth cameras used in Microsoft’s Kinect system lets you control, say, a gesture-driven game. In trials in a university cafeteria, the team settled on a registration gesture they call The Teapot; users put their hands on both hips, their arms describing the profile of two teapot handles. This was the most robust gesture, even when obfuscated(使模糊)by thick clothing.
    Screenfinity, led by Jorg Muller, generates content for large, long screens that follows the viewer as they walk along beside it. The system monitors passers-by with 10 Kinect cameras placed along the length of a screen. As a person approaches, text or pictures pop up and slide along in sync(同步)with their walking. If someone moves further away, the text gets bigger; closer, and it gets smaller, so it is equally legible all the time. In a recent trial on the TUB campus, cafe menus were displayed in a bustling square. Not only were people able to read the menus at varying distances and without breaking stride, the display proved so attention-grabbing that it had users looking behind the screen to see if a person was tracking them.
    Simon Parnall of News Digital Systems in Staines, UK, is developing floor-to-ceiling TV screens. StrikeAPose is user-friendly, he notes, since people only need simple gestures to interact with it. But he wonders how many people will want to " perform a potentially embarrassing gesture in a public space in order to interact". He foresees organizations like the London Underground making strong use of Screenfinity, however, as it will allow ads to move down the escalators, tethered(用绳子拴住)to specific commuters.
What does the author mean by saying "a tuned-out public"(Line 3, Para. 2)?
选项 A、People remain silent in public places.
B、People are indifferent to messages sent to them.
C、People are inactive in front of the advertisement.
D、People feel relaxed to accept information.
答案B
解析 由题干提示定位到第二段第二句。该句谈到，德国柏林科技大学的研究人员开发了两个应用程序，他们希望这些巨型显示屏能够应用这两个应用程序吸引路人，激发新一轮的互动显示浪潮。文中的tune out应该与attract以及inspire表达的意思相反。 tune out的本意是“停止倾听；关掉”。文中表达的意思是公众对传递给他们的信息比较冷漠，因此B)“人们对传递给他们的信息漠不关心”符合题意。
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