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
33
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 likely to happen when Alex Zettl’s research is successfully commercialized?
选项
A、Human records will be kept for a long time.
B、Digital age will be ended sooner or later.
C、Many companies will be attracted by the technology.
D、The world will be changed greatly.
答案
A
解析
推理判断题。定位句是对Alex Zettl等人的研究的展望,同时也与第一段前后呼应。该句表明,数字丢失将会成为过去的事情,即数据或信息将不会遗失,故A)“人们的记录将会被长期保存”为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2819858.html
相关试题推荐
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
ThefirstbabyinBritaintosurviveahearttransplantcelebratedher18th
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepai
随机试题
Englandisnotabigcountry:fromnorthtosouthandfromeasttowestiti
WalterAdamsonis[br][originaltext]GovernmentsfromSingaporetoSouthKo
设某产品的需求函数为Q=Q(P),其对价格P的弹性εP=O.2,则当需求量为10
当管道尺寸及粗糙度一定时,随着流量的加大,紊流流区的变化是()。A.光滑区→
粗肌丝上横桥具有A.能传导肌膜的兴奋 B.能与ATP结合,具有ATP酶活性
《普通高中语文课程标准(实验)》提出了发展独立阅读能力的基本目标,某教师依据这一
数行为在处理时作为一罪的情况有( )。 A.连续犯 B.牵连犯 C.吸收
交易所证券账户是指以基金名义在中央国债登记结算有限公司开立的乙类债券托管账户,用
共用题干根据《宪法》和法律的规定,关于立法权权限和立法程序,下列选项正确的是、
耐火浇注料施工技术要求不包括()。A.不应在搅拌好的耐火浇注料内任意加水或其他
最新回复
(
0
)