Scientific American 60 Second Science听抄（有音频文件）

H-KevinUID: 2182070

June 8

Well that happen eventually, this week New England Journal of medicine features a brand new diagnose it's wiiitis which you get from overdoing it with the Nintendo Wii. The case involved then otherwise healthy 29-year-old physician who work up with intense right shoulder pain. He consult rumertologist  to determine the problem was acute tended ? in the infertisnetters. As one of the routine calf muscles which invented many major pitching career. Anyway the young doctor realize the gonna a little nuts with this new Nintendo Wii play virtual tennis. And since you're not running around the court like a real tennis you can just keep playing hour after hour after hour, there by getting wiiitis which spelled interestingly w-i-i-i-t-i-s, the first intend nasty diagnose came 1990 but that with thumb injury from operating the kinds of games available then. With the advent the wii and virtual tennis as well as golf, baseball, bowling even boxing doctor should be on looking out for all kinds of new wiiitis possibilities. Thanks for the minute for scientific American60 seconds science I’m Steve Mirsky.

[ 本帖最后由 H-Kevin 于 2007-6-16 20:42 编辑 ]

H-KevinUID: 2182070

Thanks:)

原帖由 forerunner 于 2007-6-8 19:25 发表
Steve Mirsky Steve Mirsky, 45, has been an articles editor and columnist at ScientificAmerican magazine for six years. His column, "Antigravity," isone of science writing's rare venues  ...

redtinaUID: 2313405

原帖由 dizzylight 于 2007-6-8 15:24 发表
June 7
Talk about a cold case, the researchers in the Italy and Switzerland have announced that they had determined the cause of the death for the iceman. He is that incredibly well preserved fr ...

He is that incredibly well preserved frozen mummy that was sticking out of the glacier in the Elbes near the Italy Austria border about ten thousand feet up back in 1891.

最后两句好像是这样：
... There's no statutory limitation on murder and the killer is still at large. The globe warming may yet reveal the perpetrators should the dying glacier set them free.

[ 本帖最后由 redtina 于 2007-6-8 23:16 编辑 ]

kevinliu6883UID: 2338522

Well that happened eventually. This week's New England Journal of Medicine features a brand new diagnose of wiiitis, which you get from overdoing with Nintendo Wii. The case involved an otherwise healthy 29-year old physician who woke up with intensive right shoulder pain. He consulted a traumatologist to determine the problem was acute tendonitis in the fertisnettis, that is one of the rotator calf muscles which invented many major pitcher career. Anyway the young doctor realized they get a little nut with this new Nintendo Wii playing virtual tennis. And since you are not running around court like a real tennis, you can keep playing hour after hour after hour, thereby you get wiiitis, which spells interestingly W-I-I-I-T-I-S. The first intend nasty diagnose came in 1990, but that with thumb injury from operating all kinds of games available then. With advent of wii, and virtual tennis as well as golf, baseball, bowling, even boxing, doctors should be on a look at, for all kind of new wiiitis possibilities.

[ 本帖最后由 kevinliu6883 于 2007-6-8 23:48 编辑 ]

kevinliu6883UID: 2338522

tendonitis 腱炎
traumatologist 创伤学专家

kelediguoUID: 149939

06-08-2007

Well that happened eventually. This week’s New England Journal of Medicine features a brand new diagnosis--Wiiitis which you get from overdoing it within the Nintendo Wii. The case involved an otherwise healthy 29-year-old physician who woke up with intense right shoulder pain. He consulted a traumatologist to determine that the problem was acute tendonitis in the infraspinatus, as one of the rotator cuff muscles which infected many majorly pitching career. Anyway, the young doctor realized he got a little nuts with this Nintendo Wii, playing virtual tennis. And since you are not running around the corner like a real tennis, you can just keep playing hour after hour after hour, thereby getting Wiiitis, which is spelled interestingly W-I-I-I-T-I-S. The first tendonitis diagnosis came in 1999 but that dealt with thumb injuries from operating the kinds of games available then. With advent of the Wii, and virtual tennis as well as golf, baseball, bowling, even boxing, doctors should be on the lookout for all kinds of new Wiiitis possibilities.

Thanks to kevinliu6883

zhaoliang_171UID: 2138918

Cell phone is great except for one problem. If you forget to recharge the battery, you might get a call without a working phone. But hey, if that phone signal can follow you all over the place, why can’t someone just beamsome electricity add your phone? Well, researchers at MIT have taken a step towards making that reality. They call it wiretricity for wireless electricity. And they were able to switch on a 60 Watt light ball from a para source 7 feet away without any wires. They did the trick by using coupled resonance which works because two objects with the same resonance frequency exchange energy very efficiently; think of the alpermsine who can make a wire less explode. The MIT system relies on magnetic field. A carper coil attach to a para source; fill the space around it with magnetic field that oscillate that particular frequency. The second receiving coil tunes that frequency; converts the magnetism back to electricity. So someday you might leave the house with a spent cell phone and watch a charge-up as you walk down the street.

H-KevinUID: 2182070

June 11

Cell phone is great except for one problem. If you forget to recharge the battery, you might get a call without a working phone. But hey, if that phone signal can follow you all over the place, why can’t someone just bee some electricity add your phone? Well, researchers at MIT have taken a step towards making matter reality. They call it wiretricity for wireless electricity. And they were able to switch on a 60 Watt light bulb from a para source 7 feet away without any wires. They did the trick by using coupled resonance which works because two objects with the same resonance frequency exchange energy very efficiently; think of the alpermsine who can make a wire less explode. The MIT system relies on magnetic field. A carper coil attach to a para source; fill the space around it with magnetic field that oscillate that particular frequency. The second receiving coil tunes that frequency; converts the magnetism back to electricity. So someday you might leave the house with a spent cell phone and watch a charge-up as you walk down the street.

[ 本帖最后由 H-Kevin 于 2007-6-16 20:42 编辑 ]

forerunnerUID: 2234967

在 H-Kevin基础上修改:handshake:)

Recharging Batteries Wirelessly

A technique relying on coupled resonancecould allow portable electronic devices to be recharged wirelessly.
Kevin Begos reports.


Cell phone is great except for one problem.If you forget to recharge the battery, you might get a call without a workingphone. But hey, if that phone signal can follow you all over the place, whycan't someone just bee (beam) some electricityadd your phone? Well, researchers at MIT have taken a step towards makingmatter reality. They call it wiretricity (WiTricity)for wireless electricity. And they were able to switch on a 60 Watt light bulbfrom a para (power) source 7 feet away withoutany wires. They did the trick by using coupled resonance which works becausetwo objects with the same resonance frequency exchange energy very efficiently;think of the alpermsine (opera singer) who canmake a wire less (wine glass) explode. The MITsystem relies on magnetic field. A carper (copper)coil attach to a para (power) source; fill thespace around it with magnetic field that oscillate that(at?) particular frequency. The (A) secondreceiving coil tunes that frequency; converts the magnetism back toelectricity. So someday you might leave the house with a spent cell phone andwatch a charge-up as you walk down (on?) thestreet.

woodmanUID: 161906

音频传上

wgaggassi34UID: 2279352

:handshake come on```

原帖由 woodman 于 2007-6-11 19:41 发表
音频传上

cw025UID: 2181480

这个帖子坚持的很好
大家加油!

H-KevinUID: 2182070

关于WiTricity

新浪科技讯 北京时间6月8日消息，据英国《泰晤士报》报道，美国麻省理工学院的
科学家们最近完成了一项实验，他们使用两个相距7英尺(约2.1米)的铜线圈，成功地通
过无线电力传输点亮了一个功率为60瓦的电灯泡。

　　在最新的网络版《科学》杂志上，美国的科学家们创造了“无线电力(WiTricity)”
这个新词。他们相信将在3到5年的时间内研发一套系统，可为手提电脑、移动电话以及
其他设备进行无线充电。一旦实现这种无线电力传输，就意味着一些小装置可以永久地
摆脱电池的束缚，从而杜绝因废弃电池带来的环境污染。然而，在这项实验中，高达45%
的能量在传输至灯泡的途中损耗掉了。索尔贾希克教授表示，尽管以后可以对铜线圈进
行精简，但目前该系统的供电效能仅为普通化学电池的一半，而且进行电力传输的铜线
圈有2英尺之高。一旦科学家们找到为手提电脑乃至电灯等设备进行无线充电的途径后，
插头和电线就将从我们的生活中消失。

　　经过多年研究，科学家们认为进行无线电力传输是可能的，但是要真正有效地实现
这种无线传输还需要进行大量艰苦的尝试与努力。马林-索尔贾希克教授提出了共振这个
概念，他认为当物体间以相同频率共振时，就有可能有效实现无线能量传输。为此，他
使用了两个铜线圈，让其中一个传输能量，另一个则接收能量。索尔贾希克教授说：“
有时我会忘记给手机充电，因此一旦手机电池耗尽手机就会嘀嘀作响把我吵醒，很是烦
人。这个项目的灵感就来源于此。我们有望实现这个目标，因此现阶段就可以开始认真
考虑其商业化价值。”

　　科学家们称，对于无线电力传输产生的微波，人们感到担心是完全没有必要的，如
果其微波射向宽广的区域，则毫无危险可言。就象是我们将手放入工作中的微波炉中，
手当然会被烧伤，但如果将微波炉门打开，人站在离其3米以外就不会受到任何伤害。就
像电灯一样，用手去触摸亮着的灯泡会感到灼热，但并不妨碍人们在灯下阅读报纸。根
据科学界目前达成的协议，2.45千兆赫兹的频率主要用于未来的电力传输，该频率可使
能量轻易穿过大气层，随后其能量将最终转变成高压直流电源。无线电力传输的工程规
模巨大，不亚于当年巴拉马运河的开凿和英吉利海底隧道的建造。

　　日本的太空研究机构此前也曾宣布，到2040年，日本将在地球空间轨道上建造一座
重达2万吨的太阳能电池板，发电能力为1000兆瓦。这可能是清洁和永久性的能源，缺点
是电价格将是现在核电售价的7倍。这一价格虽然很高，但由于石油燃料日趋枯竭和核燃
料废物增加已造成越来越多的隐患，今后其前景仍然十分广阔。科学家们甚至还设想在
月球上建造大型太阳能电池板，然后再将电力通过无线传输送回地球。他们计划将50千
米宽的太阳能板安装在月球上或在地球太空轨道上飞行，由于这时的太阳能板不像在地
球上那样受空中云彩、大气尘埃以及白昼交替的影响，因而接受的光照将比在地球上多8
倍。电能产生后，科学家构想的第二步便是通过微波束把电能传向地球，由地面上长达1
0千米的矩形天线接收。每套由空中太阳能电池板和地面接受装置构成的电力产生和无线
传输系统，其发电量相当于一座地面核电站。 　

　　早在1913年，既是航海家又是网球选手的法国人罗兰-加洛斯就提出能否从地面为空
中飞行器提供动力，随着微波炉和移动电话技术的成熟，加洛斯的问题就有了解决的答
案。马林-索尔贾希克解释说，未来的无线电力传输系统首先要解决电力生产和输送两大
问题。从低频波到宇宙射线，整个电磁波波谱皆存在着波动。而波动向外发射时携带着
能量，频率越高，能量越大。如果这种电磁波能够烹饪食品，当然也能提供电能，人们
要做的仅仅是将微波转变成传输效率更高的长波

zhaoliang_171UID: 2138918

恩，很有见地！:)

kevinliu6883UID: 2338522

Cell phone is great, except for one problem. If you forget to recharge the battery, you might get call without a working phone. But hey, if that phone signal can follow you all over the place, why can some just beam electricity at your phone? Well, researchers at MIT have taken a step to make that reality. They call it WiTricity, for wireless electricity. And they were able to switch on a 60-watt bulb from a power source 7 feet away, without any wires. They did the trick by using a couple of resonance, which works because two objects with same frequency, exchange energy very efficiently. Think of an opera singer who can make the wine glass explode. The MIT system relies on magnetic field. A copper coil attached to a power source, fill the space around with magnetic field, and oscillate at particular frequency. A second receiving coil tuned to that frequency converts the magnetism back to electricity. So someday you might leave the house with a spent cell phone, and watch a recharge up as you walk down the street.