首页
登录
职称英语
Few human records survive for long, the 16 000-year-old Paleolithic cave pai
Few human records survive for long, the 16 000-year-old Paleolithic cave pai
游客
2023-07-08
41
管理
问题
Few human records survive for long, the 16 000-year-old Paleolithic cave paintings at Lascaux, France, being one exception. Now researchers led by Alex Zettl of the University of California, have devised a method that will, they reckon, let people store information electronically for a billion years.
Dr. Zettl and his colleagues constructed their memory cell by taking a particle of iron just a few billionths of a meter or nanometers(纳米)across and placing it inside a hollow carbon nanotube. They attached electrodes(电极)to either end of the tube. By applying a current, they were able to shuttle the particle back and forth. This provides a mechanism to create the "1" and "0" required for digital representation; if the particle is at one end it counts as a "1", and at the other end it is a "0".
The next challenge was to read this electronic information. The researchers found that when electrons flowed through the tube, they scattered when they came close to the particle. The particle’s position thus altered the nanotube’s electrical resistance on a local scale. Although they were unable to discover exactly how this happens, they were able to use the effect to read the stored information.
What makes the technique so durable is that the particle’s repeated movement does not damage the walls of the tube. That is not only because the lining of the tube is so hard; it is also because friction is almost negligible when working at such small scales.
Theoretical studies suggest that the system should retain information for a long time. To switch spontaneously from a "1" to a "0" would entail(使必要)the particle moving some 200 nanometers along the tube using thermal energy. At room temperature, the odds(几率)of that happening are once in a billion years. In tests, the stored digital information was found to be remarkably stable. Yet the distance between the ends of the tube remains small enough to allow for speedy reading and writing of the memory cell when it is in use. The next challenge will be to create an electronic memory that has millions of cells instead of just one. But if Dr. Zettl succeeds in commercializing this technology, digital decay itself could become a thing of the past. [br] What is Alex Zettl’s research aiming at?
选项
A、Revealing the secret of preserving aged records.
B、Letting people memorize information permanently.
C、Making an electronic memory to retain records for long.
D、Putting his mechanism into the market.
答案
C
解析
推理判断题。定位句表明,Alex Zettl等人的研究会让人们长久地储存信息。由此可以推测,Alex Zettl等人研究的目的是C)“制造能够长久储存信息的电子存储器”。
转载请注明原文地址:https://tihaiku.com/zcyy/2819854.html
相关试题推荐
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
随机试题
中国的肥胖率(obesityrate)这些年来迅速上升。目前,中国有1/4的成人超重或者极为肥胖。这个数字在未来20年里还可能增加一倍。超重导致的一系
KeepingaPositiveAttitudeForthispart,youareallowed30minutestow
全面收集所承担工程项目施工过程中应执行的标准,并做好落实标准的相关措施与制度是标
下列有关眼眶内海绵状血管瘤,错误的是A.中年女性多见 B.MR上明显长T2信号
以下属于放疗与化疗的止吐药的有()。A:达沙替尼 B:昂丹司琼 C:吉非替
安全色蓝色的对比色为()。A.黑色 B.白色 C.黄色 D.绿色
以下不属于到达掘进施工技术要点的是()。A、及时将洞口段数环管片纵向临时拉紧成整
已婚妇女王某,停经40天,前来咨询检查结果,医生告诉她下列哪项检查对早孕诊断无帮
A.理想电压源 B.理想电流源 C.理想电压源与理想电流源 D.不提供理想
国家规划某矿区拟建原煤生产能力240万t/a的煤矿。井田面积55km2,煤层埋深
最新回复
(
0
)