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
91
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.
Communications technology was used on ocean expedition at the launching of Ronald H. Brown.
选项
A、Y
B、N
C、NG
答案
B
解析
首先快速阅读一下题干,发现其中有一个可定位专有名词Ronald H,Brown,扫读文章发现文章的第三、第四段都有提及该名同。再看题干中有Communications technology,可以确定它对应的地方是文章的第四段。但是要注意文章中说Ronald H.Brown raises the bar on use of communications technology,也就是说它没有使用communications technology。所以该题的答案是N。
转载请注明原文地址:https://kaotiyun.com/show/GcA7777K
0
大学英语四级
相关试题推荐
Throughaseriesofexperiments,anAmericanscientisthasobtainedanunderstandingofthesocialstructureofthemostcomplex
A、Tonyshouldcontinuetakingthecourse.B、SheapprovesofTony’sdecision.C、Tonycanchooseanothersciencecourse.D、Shecan
A、Todiscoverthestudents’studyhabits.B、Todiscoverhowmanystudentswantedtogetmarried.C、Todiscoverthesubjectsthat
Imadeupmymindthatundernocircumstance______(我会同意)togiveupmycompany.
Dalianurgentlyneedstoestablisha【B1】______oftalentedpeopletomeetthechallengesintheworldmarket.Ataconference
Dalianurgentlyneedstoestablisha【B1】______oftalentedpeopletomeetthechallengesintheworldmarket.Ataconference
Dalianurgentlyneedstoestablisha【B1】______oftalentedpeopletomeetthechallengesintheworldmarket.Ataconference
TheMinistryofEducationistoupgradeteachingmethodsand【B1】______incollegesanduniversitiesthroughoutthecountry.Thea
A、Soldlotsofthings.B、Soldacomputer.C、Boughtacomputer.D、Boughtnewclothes.C事实题。此题应首先排除A)、B)选项。因为从对话一开始可听到“Iboughtso
A、Beforedinner.B、Duringdinner.C、Rightafterdinner.D、Thenextday.A语义推断题。男士表示他也不愿意在吃饭的时候讨论这件事。由此可见,男士同意在饭前讨论日程安排。选项A正确。
随机试题
A.太冲、三阴交B.曲池、大椎C.列缺D.曲池、尺泽面痛属气血瘀滞证除选主穴外还可配用
婚前保健的意义
患者,男,35岁。车祸致颈椎骨折,拟择期行椎板减压内固定术。胸。平面以下皮肤感觉消失。全麻诱导时,应特别注意的并发症是
业主方在投资控制方面的管理任务包括()。
某建设工程项目采用施工总承包方式,其中的幕墙工程和设备安装工程分别进行了专业分包,对幕墙工程施工质量实施监督控制的主体有()等。
《会计基础工作规范》规定,企业自制的原始凭证必须有()的签名或盖章。
下列说法正确的是()。
如图,某住宅小区的平面图呈圆心角为120°的扇形AOB.小区的两个出入口设置在点A及点C处,且小区里有一条平行于OB的小路CD已知某人从C沿CD走到D用10分钟,从D沿DA走到A用了6分钟.若此人步行的速度为每分钟50米,求该扇形的半径OA的长.(精确到
暗示教学法的提出者是()
______indoinganexamination,thetimepassedbyquickly.
最新回复
(
0
)