手机APP下载

您现在的位置: 首页 > 在线广播 > 视频广播 > 每日视频新闻 > 正文

每日视频新闻:飓风"艾萨克"横扫美国摩根堡 沙滩现南北战争时期船只

来源:可可英语 编辑:kahn   可可英语APP下载 |  可可官方微信:ikekenet
RBeV8paA0tu1S12&l0a1
【Austrian Programmers Build Free Bridge to Internet】

_i27DKs~J|!

3UFj1b^[PDG((fo

视频下载(点击右键另存为)
TEXT:For most users, Internet access is a utility, like phone service and electricity. Customers pay a company to access the Web through phone service or cable TV lines. But FunkFeuer's equipment on Vienna rooftops is a different.

sMPk%RrnhU4!Q%m

It provides wireless network access across large areas using the same open radio spectrum as WiFi. But unlike traditional WiFi, responsible for small wireless networks in homes and offices, the FunkFeuer mesh operates over much bigger distances.

"You could do the same, of course, in a road, from window to window, and just sort of bounce along the road," explained Aaron Kaplan, a founder of the FunkFeuer mesh network. "Then you don't need these complicated, big-looking antennas. You can take just small ones just like this and just put it in your window."

F@_G-XxJh+y79WLBp

The key is to have enough users to put routers and antennas out in the open, so that every user becomes another provider, further extending the network. If one node has access to the Internet, all of the FunkFeuer users on the network do too.

Many look at the technology as a way to circumvent government Internet controls.

W0(5x7YA(vla

"It's very hard to shut them down, because you have to go after each single node, every single node owner," Kaplan explained. "So it's not easy, it's not as easy as it was in Egypt, where you go to one ISP (Internet Service Provider), which has all the Internet cables going through one building, and you just call them and say you need to shut this down. This is not possible anymore because it's so distributed."

~+|n*UUx_N

Metalab is a so-called hackerspace in Vienna, where tech enthusiasts collaborate on projects like computer networks as well as radio.

Adrian Dabrowski was one of the first to work on FunkFeuer. Dabrowski recalled first playing with the then-new WiFi possibilities.

"There were these experiments, make an own antenna and get not 20 meters but get 100 meters or get 200 meters and yeah, it was very interesting and suddenly you could build networks over a whole city and it was like a whole new world," Dabrowski recalled.

,WIJe*![|Q-uWT%L67W

And here, collaboration with ham radio operators like Clemens Hopfer has led to a new breakthrough that has allowed them to send data by shortwave radio to receivers up to 200 kilometers away.

"If you want to spread links across a big country, it's not that easy to do it, but, it is possible," Hopfer said.

*P8aD!%[UyV

Programmers say the technology holds great promise - and to help spur innovation, all of their plans and technical memos are available free, online.

bjip8.g5Pbys%j+[p

PM)ESPiuSARdo1dl9nY[9OKHqjSKBjPK~|#zGlxeWL[%[1k1t 内容来自:可可英语 //www.utensil-race.com/menu/201209/197955.shtml

重点单词   查看全部解释    
hurricane ['hʌrikən]

想一想再看

n. 飓风,飓风般猛烈的东西
adj.

联想记忆
opposition [.ɔpə'ziʃən]

想一想再看

n. 反对,敌对,在野党

 
military ['militəri]

想一想再看

adj. 军事的
n. 军队

联想记忆
compromise ['kɔmprəmaiz]

想一想再看

n. 妥协,折衷,折衷案
vt. 妥协处理,危

联想记忆
spectrum ['spektrəm]

想一想再看

n. 光谱,范围,系列

联想记忆
collaboration [kə.læbə'reiʃən]

想一想再看

n. 合作,通敌

联想记忆
antenna [æn'tenə]

想一想再看

n. 触角,天线,感觉,直觉

联想记忆
coordination [kəu'ɔ:di'neiʃən]

想一想再看

n. 协调

 
response [ri'spɔns]

想一想再看

n. 回答,响应,反应,答复
n. [宗

联想记忆
control [kən'trəul]

想一想再看

n. 克制,控制,管制,操作装置
vt. 控制

 


文章关键字: 每日 视频 新闻

发布评论我来说2句

    本节目其它精彩文章:
    订阅到邮箱 查看更多>>

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。