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农业农村部:生猪生产力争明年底恢复到常年80%水平

時間: 2017年05月22日 | 作者: admin | 來源: 未知

撰文︰克里斯多弗 因塔利亞塔

翻譯︰惠丹丹

審核︰馬小崩

There's a scene in Bladerunner, Ridley Scott's sci-fi classic, when Harrison Ford's character, Deckard, is about to interview Rachael, played by Sean Young, to test whether she's a real human—or a replicant. ["It's too bright in here."] On cue, the floor-to-ceiling windows dim, shading the room from the golden sunlight outside.

雷德利?斯科特導演的科幻經典電影銀翼殺手中有一個場景,哈里森?福特飾演的迪卡德面試由肖恩?楊飾演的蕾切爾以測試她是人類還是一個復制品。[“這里太亮了。”]這時,從地板到天花板的窗戶變暗淡,遮擋了從外面入射的夕陽。

It was a beautiful Hollywood effect when the movie came out in 1982. And now it may not be that far from reality. Because researchers at Harvard recently designed a material that, with a shot of electricity, can transform a glass window from transparent to opaque in less than a second. 

1982年這部電影上映時,是一個非常美麗的好萊塢特效。而現在這也許距實現它不遠了因為最近哈佛的研究人員設計了一種材料,給其施加一電脈沖,可以內將透明的玻璃窗轉換成不透明的

The team built the window by sandwiching glass between two sheets of a transparent, balloon-like rubber material, laced with silver nanowires. As is, the material is clear. But apply voltage, and the nanowires are attracted to each other ever so slightly across the glass—which deforms those rubbery sheets just enough to scatter light, causing the glass to cloud up. They describe the device in the journal Optics Letters. [Samuel Shian and David R. Clarke, Electrically tunable window device]

研究組通過把玻璃夾在兩片類似氣球的透明的橡膠材料中間加入銀納米線制備成這種窗戶。像其它玻璃材料一樣,它是透明的,但加上電壓,則玻璃兩邊的納米線相互吸引穿過玻璃—使得那些橡膠薄片足以散光,從而使玻璃模糊。他們將這一發現發表光學快報。

Study author Samuel Shian, a materials scientist, says this smart glass is cheaper than others, and uses minimal power—much less, for example, than something like a curling iron. And, since it's flexible and foldable, he says it could even be used for things like camouflage uniforms, to switch, for example, from green and brown to white and gray. "This would be very useful when the background landscape suddenly changes, such as during early snowfall."

Bladerunner was set in Los Angeles in 2019. Meaning Shian and others still have about three years to turn one bit of science fiction into science fact.

研究作者塞繆爾?紫安是一個材料科學家,他說這種智能玻璃比一般的玻璃更便宜,而且耗電—比如,比卷發器的東西用電的多。另外他說由于這種玻璃是柔軟可折疊的,甚至可以用于制作像迷彩制服一樣的偽裝物比如綠色和褐色變為白色和灰色。“當背景突然改變的時候這是很有用的比如早期降雪時期。”銀翼殺手將于2019年在洛杉磯上映也就是說紫安和其他的科學家還有三年的時間這一科幻變為科學事實。

 

原文鏈接︰

http://www.scientificamerican.com/podcast/episode/smart-glass-goes-from-clear-to-cloudy-in-a-jolt/