首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
"Lost City" Explored Using High-Speed Networks Undersea exploration is now as close as the nearest computer. "Telepresence"
"Lost City" Explored Using High-Speed Networks Undersea exploration is now as close as the nearest computer. "Telepresence"
admin
2010-08-04
59
问题
"Lost City" Explored Using High-Speed Networks
Undersea exploration is now as close as the nearest computer. "Telepresence" (远程呈现) technology lets scientists -- and the public -- join expeditions without leaving dry land.
A just completed expedition to the Lost City, an unusual undersea vent formation in the Atlantic Ocean, showcased the technology. The project used a network of satellites and high-speed Internet access to connect participants across many miles of land and sea.
During the expedition undersea explorer Robert Ballard and the crew aboard the National Ocean ic and Atmospheric Administration (NOAA) research ship Ronald H. Brown were anchored above the Lost City site. Meanwhile co-chief scientist Debbie Kelley and her colleagues were some 4,500 miles (7,250 kilometers) away on the University of Washington campus in Seattle.
At launch on July 17 Ballard described the project as a "precedent-setting ocean expedition that raises the bar on use of communications technology."
"Normally on a deep-ocean expedition, I talk with the mission’s chief scientist across a table on the research vessel," he said. "In this case we talk across the planet."
Ballard’s Institute for Exploration (IFE) in Mystic, Connecticut, supplied its veteran robotic vehicles, Hercules and Argus, to do the diving. The robots sent high-resolution images taken some 2,100 feet (700 meters) below the surface to the Ronald H. Brown.
The images were transferred via satellite from the ship to receivers at the University of Rhode Island in Kingston. They were then sent across country to the team at the University of Washington.
All told, data from the Lost City travelled nearly 5,000 miles (8,050 kilometers) in less than two seconds. Technology Boosts "Crew" Size, Expertise
Real-time deep-sea images have been beamed around the globe before. Ballard, who discovered the undersea wreck of the Titanic in 1985 ,returned to the site in 2004 and sent images to scientists at the University of Rhode Island.
But this time the lead scicentists directing the expedition’s research operations joined the dive virtually.
"We had a team of engineers and pilots who controlled the remotely operated vehicles (ROVs) and were taking instructions at all times from the University of Washington ( science team)," Dwight Coleman said. Coleman is a professor of marine science at the University of Rhode Island and a colleague of Ballard’s at IFE.
Only so many people can live aboard a research ship. And although a large vessel may accommodate a science party of 30, half must be engineers who maintain and operate the ROVs.
The number of researchers is thus limited by ship space, as well as by scheduling, budgets, and other real-world concerns. Telepresence provides an intriguing(令人好奇的) solution.
"When you’re doing exploration, you’re never sure what expertise you’ll need, because you’re never sure what you’ll find," Coleman said. "This technology provides the capability to network in experts on a specific subject from around the world. You can invite everybody aboard the ship."
The technology seems to have a bright future. NOAA is converting a former U. S. Navy vessel, the U. S. N. S. Capable, into a research vessel dubbed the Okeanos Explorer (okeanos is the ancient Greek term for "ocean" ). The ship will be specially outfitted for future telepresence missions.
Of course, telepresence technology isn’t exactly like being at sea.
In her online expedition log, co-chief scientist Deborah Kelley described the nearly surreal scene as Hercules first touched bottom. Kelley and her science team watched the action via cameras carried by. Argus, hovering some 100 feet (30 meters) above the seafloor.
"This was a view like no other I had ever seen," she reported. "In the dark of the room at the UW with our first views of the bottom, I felt as if I was suddenly in the control room on the ship."
"Later, walking out into the !it hallway in Mary Gates Hall, I was struck by the sharp contrast of being immersed within the environment of an ocean 4,500 miles away and nearly one half mile [ 0.8 kilometers ] down and that of a sunny Seattle day with Mt. Rainier in full view." A Natural Atlantis
The Lost City is an undersea hot spring region unlike any other known to science. Kelley and her team at the University of Washington discovered the region by accident during a manned submersible(能潜水的) expedition in 2000.
The site boasts dramatic, 90- to 200-foot-high (30- to 60-meter-high) carbonate "chimneys" that vent methane(沼气) and hydrogen-rich fluids. The pale towers, which host a great diversity of marine life, inspired the scientists to name their find after the mythical city of Atlantis.
The site resembles undersea vent systems found along ridges in the seafloor where tectonic (建造) plates are spreading apart.
Escaping hot volcanic gas at these vents creates a sunless but nutrient-rich environment that sup ports creatures such as tubeworms, mussels, shrimp, and large clams. The vents, first discovered nearly 30 years ago, changed scientific perspective on how and where life can exist on Earth.
The Lost City formation, found 9 miles ( 14 kilometers) from the Mid-Atlantic Ridge, is the first evidence that other areas of the ocean could contain such ecosystems.
Using ROVs in addition to manned submersibles, the scientists hope to learn more about the type of organisms that can thrive near hydrothermal systems.
And thanks to telepresence technology, scientists weren’t the only ones who could join the most recent Lost City expedition from remote sites half a world away.
Immersion Presents, IFE’s sister organization, transferred live feeds and produced programs that allowed educators, Boys and Girls Clubs, museums, and libraries in the United States and Mexico to take part.
"We want to connect the general public to ocean exploration through satellite and Internet technology, "Coleman said.
In fact, the live views from Hercules and Argus were often available to anyone, anywhere in the world, who had an Internet connection via the Immersion Presents Web site.
Real-time deep-sea images have never been sent to the globe before the using of communications technologies.
选项
A、Y
B、N
C、NG
答案
B
解析
首先快速阅读一下题干,发现其中有两个单词有连字符,可以用来定位。这样我们就可以发现在第一个小标题下的第一段中有Real-time deep-sea images have been beamed around the globe before.,也就是说在以前已经用过了。注意beam意为send in certain directions。
转载请注明原文地址:https://kaotiyun.com/show/QcA7777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowedthirtyminutestowriteacompositiononthetopicTheAppropriateTeacher.StudentRelationship.
ACMEAtlanticisawell-knownandrespectedtradingcompany.Wehandlewithimportsdirectlyfrommanufacturersin35different
Dalianurgentlyneedstoestablisha【B1】______oftalentedpeopletomeetthechallengesintheworldmarket.Ataconference
A、Theadvantagesanddisadvantagesofcomputers.B、Thefutureofthecomputer.C、Themainfeaturesofthecomputer.D、Thescient
A、Thelocationofthecomputer.B、Theaddressofthewebsite.C、Thenewschedule.D、Howtofindanewhome.B本题的问题是w问的是什么?从w的回答中
A、Thediningroom.B、Thecompanythatmakesthematerial.C、Theconferenceroom.D、Theshowroom.C男士最后说Let’sgototheconferenc
NorthPoleExplorationsIfSantaClansreallydoesresideattheNorthPole,hemustlivealonelylife.TheNorthPoleisn’
A、Teacherandstudent.B、Doctorandpatient.C、Managerandofficeworker.D、Travelagentandcustomer.C女士询问男士自己能否可能下个月早点的时候去度假,
TheIberianswerethe______settlersofBritainatabout3000BCduringtheNewStoneAge.
随机试题
颌面部危险三角区内的化脓性感染处理不当最易引起的并发症是
某施工单位承接了某山区二级公路4.5km的施工任务。合同段有一段长450m的两车道隧道。隧道位于软弱围岩地段。在隧道施工方案中有如下要求:(1)在隧道施工期间,由专职安全员作为安全生产的第一责任人,对隧道施工安全生产全面负责;
会计人员无论短期离职还是长期离职都应办理会计工作交接手续,且由下列人员监交()。
下列各项中,说明了投资方案单位投资所获得的净收益的是()。
某工业企业增值税一般纳税人2017年9月购销业务情况如下:(1)购进生产原料一批,已验收入库取得的防伪税控系统开具的增值税专用发票上注明的价、税款分别为23万元、3.91万元。(2)购进钢材20吨,未入库,取得的防伪税控系统开具的增值税
在一个C类网络中,()是无效的IP地址。
根据《刑事诉讼法》的相关规定,下列哪一案件是由高级人民法院管辖的第一审刑事案件?()
北京故宫博物院积极开辟新思路,不仅让雍容华贵的朝珠与现代的电子耳机实现了“合体”,还推出了“朕就是这样的汉子”折扇、顶戴花翎官帽防晒伞等文化创意产品。这一做法:
根据代理权产生的根据不同,可将代理分为()。
脸谱的颜色使观众对人物的善恶美丑一目了然。
最新回复
(
0
)