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
72
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.
Mary Gates Hall locates opposite Mountain Rainier.
选项
A、Y
B、N
C、NG
答案
A
解析
首先快速阅读一下题干,发现其中有一个可定位专有名词Mary Gates Hall,那么就不难定位到第一个小标题下的最后一段。我们可以看到在Mary Gates Hall的走廊上可以看到完整的Mountain Rainier,所以此题的表达是正确的。
转载请注明原文地址:https://kaotiyun.com/show/1cA7777K
0
大学英语四级
相关试题推荐
A、Tonyshouldcontinuetakingthecourse.B、SheapprovesofTony’sdecision.C、Tonycanchooseanothersciencecourse.D、Shecan
A、SendingpicturesthroughE-mailistooexpensive.B、ThephotographwasnottakenattheModemMuseum.C、TheyalreadysentLind
A、Hehadalottodobeforehegotsleepy.B、Hewasexcitedforanearlystartthenextmorning.C、Hejustcouldn’thelpitast
Dalianurgentlyneedstoestablisha【B1】______oftalentedpeopletomeetthechallengesintheworldmarket.Ataconference
A、Governmentofficersarehardtoplease.B、Thelearnerhastogothroughseveraltoughtests.C、Thelearnerusuallyfailssever
TheMinistryofEducationistoupgradeteachingmethodsand【B1】______incollegesanduniversitiesthroughoutthecountry.Thea
TheMinistryofEducationistoupgradeteachingmethodsand【B1】______incollegesanduniversitiesthroughoutthecountry.Thea
Theoceans,whichcovernearlythree-quartersofEarth’ssurface,remainlargelyunexploredbecauseoftheirvastnessandinacce
NorthPoleExplorationsIfSantaClansreallydoesresideattheNorthPole,hemustlivealonelylife.TheNorthPoleisn’
随机试题
俗称“蛤蟆肿”是指A.黏液腺囊肿B.舌下腺囊肿C.皮样囊肿D.表皮样囊肿E.甲状舌管囊肿
甲委托其在外地的好友乙代购药材,并汇去2万元钱。因一时无货,乙便以甲的名义将钱暂存银行。乙的好友丙因生产经营急需用钱,去找乙,乙便拿出甲的存折给丙,由丙的好友丁担保。乙未将上述情况告知甲。后丙因生产经营不善无力还款而引起纠纷。甲诉至法院。本案中哪些法律关系
下列不属于出卖人义务的选项有()。
从广义上讲,下列人员中属于银行业从业人员范畴的还有()。
________指人们对自己是否能够成功地进行某一成就行为的主观推测和判断。
甲状腺大部切除后,引起窒息的原因包括()。
该图反映的是刑事案件进入刑事司法流程的数量变化情况。在各刑事司法机关均努力履行各自职责的情况下,若刑事案件仍呈此变化趋势,下列贯彻综合治理应侧重的方面有:
有一种细菌和一种病毒,每个细菌在每一秒末能杀死一个病毒的同时将自身分裂为两个。现在有一个这样的细菌和100个这样的病毒,问细菌将病毒全部杀死至少需要()秒。
Thearrivalofthemass-producedcar,justoveracenturyago,causeda(n)(1)_____ofbusinesscreation.Firstcamethemakerso
Theunauthorized(未经授权的)copyingofcomputerprogramsbyAmericanbusinessesalonedeprivedsoftwarepublishersof$1.6billion
最新回复
(
0
)