j*****1
发帖数: 3 | 1 A newly established laboratory within the Department of Biology at New York
University is seeking a motivated postdoctoral fellow. The research focuses
on the molecular mechanisms of epigenetic regulation, particularly the role
of non-coding RNAs and epigenetic marks in chromatin organization in fission
yeast.
The applicants for the position must have a Ph.D. in Biochemistry, Cell
Biology, Genetics, Molecular Biology, or related fields, and should have
experience in some of the following experim |
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w*********s
发帖数: 2136 | 2 Is Japan's Elite Hiding A Weapons
Program Inside Nuclear Plants?
By Yoichi Shimatsu
4-6-11
Confused and often conflicting reports out of Fukushima 1 nuclear plant
cannot be solely the result of tsunami-caused breakdowns, bungling or
miscommunication. Inexplicable delays and half-baked explanations from Tokyo
Electric Power Company (TEPCO) and the Ministry of Economy, Trade and
Industry (METI) seem to be driven by some unspoken factor.
The smoke and mirrors at Fukushima 1 seem to obscure a steady... 阅读全帖 |
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p*********f
发帖数: 633 | 3
bottom
After
I didn't read your "reference" either, but the "everything was turned into
energy and released" is bullshit. For atomic bombs, which is based on
nuclear fission, only less than 1% (perhaps much less, I don't know the
exact number) of the mass is turned into energy.
I'm a physics major. |
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p*********f
发帖数: 633 | 4 This is neither physics board or military board, so I don't really see the
point of such a discussion here, but since you insist...
into
Citations? Any textbook of a college physics class. Are you trying to
crack
a joke here? If yes, I don't see it.
As I said, I didn't read your "reference". You mentioned Uranium-235, and
explosion, so I natually assumed it's about an atomic bomb.
The products of a nuclear fission, besides the neutrons and alpha/beta/gamma
radiations, are different chemical |
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j****y
发帖数: 1714 | 5 The following article says,
" there was no government plan adequate to respond to a disaster at the
Indian Point nuclear reactor, just 80 km from New York City. "
http://search.japantimes.co.jp/cgi-bin/fl20040523x2.html
Sunday, May 23, 2004
Japan's deadly game of nuclear roulette
By LEUREN MORET
Special to The Japan Times
Of all the places in all the world where no one in their right mind
would build scores of nuclear power plants, Japan would be pretty near
the top of the list.
An aerial view o... 阅读全帖 |
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y***u
发帖数: 5243 | 6 聚变大概只能用来做武器了吧。fusion是聚变是吧。。。fission是裂变，两个词从来
没整清除过 |
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S****e
发帖数: 931 | 7 Fact Sheet: Increasing Plutonium Storage and Usage at Livermore
Lab Endangers the Bay Area and Central Valley
The Department of Energy (DOE) plans to double the administrative limit for
plutonium to 3,080 pounds, which is the amount that
can be housed in Livermore Lab's plutonium building. DOE also plans to
double the amount that can be used in a process or room
from 44 to 88 pounds. These plans, announced in the final Site Wide
Environmental Impact Statement (SWEIS) on Livermore Lab
operations,... 阅读全帖 |
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h****r
发帖数: 2056 | 8 Japan nuclear alert at Fukushima - Q&A
15 March 11 12:19 GMT
There have been two explosions at the Fukushima Daiichi nuclear power plant
in Japan, following Friday's earthquake and tsunami, and a third reactor is
reportedly at risk of fuel-rod meltdown.
How great a danger do these problems pose for people in Japan and further
afield?
Has there been a leakage of radioactive material?
Yes. Local government officials in Fukushima say 190 people have been
exposed to some radiation. An American warsh... 阅读全帖 |
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p*r
发帖数: 548 | 9 summary：
Iodine-131 0.165 mBq/m3
Iodine-132 0.03 mBq/m3
Tellurium-132 0.04 mBq/m3
Cesium-137 0.002 mBq/m3
Today, one of the monitoring stations in Sacramento, California that feeds
into the IMS detected miniscule quantities of iodine isotopes and other
radioactive particles that pose no health concern at the detected levels.
Collectively, these levels amount to a level of approximately 0.0002
disintegrations per second per cubic meter of air (0.2 mBq/m3).
Specifically, the level of Iodine-131 ... 阅读全帖 |
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l*****O
发帖数: 402 | 10 I think we are worried about I129 which is a product of nuclear fission.
Plus it is highly biophilic, and occurs in multiple ionic forms which have
different chemical behaviors. This makes it fairly easy for I129 to enter
the biosphere as it becomes incorporated into vegetation, soil, milk, animal
tissue, etc.
So I am confused with what 石九公 said. If we need to avoid milk
contaminated with isotopes of iodine (majorly we are avoiding milk
contaminated with I129, not milk contaminated with I131), t... 阅读全帖 |
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c*****n
发帖数: 601 | 11 二号堆放射强度是正常的一千万倍，根据凤凰网，强度为1媳妇，可以直接杀人了。明白为啥前两天说测试仪器有故障，想来是数值太高不敢报。
http://www3.nhk.or.jp/daily/english/27_12.html
Tokyo Electric Power Company says it has detected radioactive materials 10-
million-times normal levels in water at the No.2 reactor complex of the
Fukushima Daiichi nuclear plant.
The plant operator, known as TEPCO, says it measured 2.9-billion becquerels
of radiation per one cubic centimeter of water from the basement of the
turbine building attached to the Number 2 reactor.
The leve... 阅读全帖 |
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s***i
发帖数: 600 | 12 800 M Kelvin = 8e8 K ~ 8e4 eV = 80 keV.
It is nothing.
U-235 fission releases ~200 MeV. |
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s**********n
发帖数: 2343 | 13 10 million - 800 million Kelvin is the temp condition for fusion.
It does not matter how many energy fission can generate. |
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s***i
发帖数: 600 | 14 how can you eliminate radiative by product from fission at that
temperature?
Please explain. |
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w*********s
发帖数: 2136 | 15 Is Japan's Elite Hiding A Weapons
Program Inside Nuclear Plants?
By Yoichi Shimatsu
4-6-11
Confused and often conflicting reports out of Fukushima 1 nuclear plant
cannot be solely the result of tsunami-caused breakdowns, bungling or
miscommunication. Inexplicable delays and half-baked explanations from Tokyo
Electric Power Company (TEPCO) and the Ministry of Economy, Trade and
Industry (METI) seem to be driven by some unspoken factor.
The smoke and mirrors at Fukushima 1 seem to obscure a steady... 阅读全帖 |
|
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h****r
发帖数: 2056 | 17 说白了就是没有多少人真正明白这个辐射的厉害（这个包括你在内），明白的人又被利
益集团罩着不让说话。都快8个月过去了，居然还有Fission，这么长度时间有多少核废
料日夜不停地被泄露出来只有鬼才知道。
总统的老家早没亲人了；佩洛西也是一大把年纪了，再说大部分时间都住在化生吞；
一句话，都不用在乎。 |
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e********8
发帖数: 929 | 18 Nuclear meltdown
http://en.wikipedia.org/wiki/Nuclear_meltdown
Nuclear meltdown is an informal term for a severe nuclear reactor accident
that results in core damage from overheating. The term is not officially
defined by the International Atomic Energy Agency[2] or by the U.S. Nuclear
Regulatory Commission.[3] However, it has been defined to mean the
accidental melting of the core of a nuclear reactor,[4] and is in common
usage a reference to the core's either complete or partial collapse. "Cor... 阅读全帖 |
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d****e
发帖数: 839 | 19 "The experiment will test a small fuel rod in a very rapid fission process. "
小型原子弹试验？ |
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t*****s
发帖数: 2933 | 20 核辐射云已经绕地球一圈了,现在又回到日本了,hehe...
发信人: cabezon (石九公), 信区: SanFrancisco
标 题: 日本玩太大了：Extreme radiation detected at No.2 reactor
发信站: BBS 未名空间站 (Sun Mar 27 02:06:29 2011, 美东)
二号堆放射强度是正常的一千万倍，根据凤凰网，强度为1媳妇，可以直接杀人了。明
白为啥前两天说测试仪器有故障，想来是数值太高不敢报。
http://www3.nhk.or.jp/daily/english/27_12.html
Tokyo Electric Power Company says it has detected radioactive materials 10-
million-times normal levels in water at the No.2 reactor complex of the
Fukushima Daiichi nuclear plant.
The plant operator, known as TEPCO, s... 阅读全帖 |
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c********i
发帖数: 1489 | 21 给Visitor的试题
Q,
What does the Apollo Fuel Cell use to generate power?
A. Solar energy
B. Liquid oxygen & liquid nitrogen
C. The fission of uranium
D. Hamsters running on wheels
这是只多么勤劳聚能的小白鼠^ ^
Q,
What kind of fuel did Robert Goddard use in his rocket?
A. Solid fuel
B. Anti-matter
C. Liquid fuel
D. There was no fuel: he used a large sling-shot
好强悍的弹弓~~~~
真相在此 |
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v*******l
发帖数: 5042 | 22 我知道，哈哈。它比较早期的产品，上臂附近还埋有无线芯片，如果被雪埋了，借助专
用仪器很容易寻找。
专业高山攀登看气候，很多场合阿尔法还是薄了。高山攀登曾经卖得最好的是fission
SV，接近1公斤。 |
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r*****a
发帖数: 27155 | 23 鸟衣主要是卖shell，里面自己搭insulation
fission |
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N**D
发帖数: 10322 | 24 那就goretex xcr, arcterex de fission用的这个，挺软的 |
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c******n
发帖数: 16403 | 25 这个行吗
20% off Arc'teryx at o2gearshop with code 20TERYX (FS over $99) in: Sports &
Outdoors
posted: Nov. 4, 2010 @ 5:50p [link to this post]
Since I missed the last REI 20% coupon, I was looking for the lowest price o
n the Arc'teryx Atom LT jacket. If you have ever shopped for Arc'Teryx, you
know that the gear rarely sells for below MSRP - typically, only at closeout
, and often websites will exclude it from coupons.
o2gearshop.com has the Atom LT jacket I was looking for for $179, wh... 阅读全帖 |
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N**D
发帖数: 10322 | 26 it 有sidewinder 和fission |
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N**D
发帖数: 10322 | 27 Should compared to insulated bird, like sentry.
Well, sentry has no women
But there is fission sv |
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s******n
发帖数: 133 | 28 我想买的是fission ar的羽绒服，也是M适合我吗？你买的jacket是什么系列的？ |
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s******n
发帖数: 133 | 29 刚买了一件fission ar的黑色上衣，还要谢谢版上ningjia介绍尺码。很合身。我现在
又想买一条裤子了。。。不知道要买那一款比较适合我的上衣，另外裤子我要买什么码
？179cm 165磅，属于四肢正常的那种体形。如果有鸟手套推荐，也推荐一下吧，就是
去cross country ski的。平时穿43码的鞋。谢谢！ |
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KV
发帖数: 5728 | 30 拼写错误，应该是mammut，户外圈内外号大象。
羽绒服的保暖在于冲绒量和蓬松度，你提到的这个是户外运动品牌之一，与north face
，columbia类似。保暖的首选是羽绒，其次才是人造棉，抓绒等。
品牌上来说，户外品牌的高端是鸟衣，加拿大arc'teryx，以冲锋衣著名，尤其是alpha
sv，alpha lt，beta ar，theta等用gore-tex pro shell，最保暖的系列是fission
sv，人造棉加gore-tex pro shell。
羽绒服类，高端的是加拿大的另一支鸟，canada goose，最著名的系列有canada goose
expedition parka，或者短款的chilliwack parka，真的是非常暖和。
其他的，类似于north face，mammut，等，你随便买，没什么差别。
不过羽绒类的外套，可供选择的很多，并不局限于户外品牌，如果你不是很热衷于户外
运动，这个品牌没什么意思。 |
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wh
发帖数: 141625 | 31 前一阵看完秘密运送原子弹的悲剧电影《USS Indianapolis》，找来一本《The Making
of the Atomic Bomb》研究。没想到居然像读武打书一样，看得紧张而着迷。边读边
还油然生出一个个“如果历史反转”的问号和感叹号：历史究竟有多少偶然，多少必然
？写下来向历史军事大牛们请教。
一、原子弹的起源
原子弹的设想竟然起源于科幻小说，而且直接启发了相关科学家。英国花花公子H.G.
Wells在1914年发表的科幻小说《The World Set Free》里，无师自通地发明了一种通
过原子核裂变（fission）产生巨大能量的原子弹。Wells娓娓描述世界爆发大战，军队
空投原子弹，夷平一座座城市……当时的科学背景是：16年前居里夫人发现放射元素；
9年前爱因斯坦发表E=mc²。还没人发现中子，更没人想到核裂变。此书销量平平
，民众兴趣寥寥，但在学界源远流长。德国物理学家Leo Szilard 1932年读了小说后，
全心致力于核裂变研究；同年，英国人James Chadwick发现中子；次年，Szilard提出
了加速中子产生核裂变的理论；再过5年，德... 阅读全帖 |
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l****e
发帖数: 137 | 32 both Cs-137 & Sr-90 has a half life of ~30 yrs. they are usually the main
fission products released as well I-
131, which is ~ 8 day in half-life. So stop drinking milk for one month may
help.
extra
a
. |
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g********d
发帖数: 19244 | 33 http://en.wikipedia.org/wiki/Criticality_accident
A criticality accident occurs when a critical reaction is achieved
unintentionally. Although dangerous, typical criticality accidents cannot
reproduce the design conditions of a fission bomb, so nuclear explosions do
not occur.
excursion: 瞬发临界
无论反应堆爆炸的起因是什么 结果都是overheating 一回路蒸汽压力过高 撑破管道
你这半吊子 以后出门千万别说自己是核工的 只能给核工丢脸
有什么不同？我都在美国学的， 有时不知道怎么翻译成中文。
but， yes, it released a surge of neutrons and increases the core power and
it resulted another explosi... 阅读全帖 |
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l*****v
发帖数: 26 | 34 1. Fission shmission, relax, I'll increase the water level after my
coffee break.
2. Was that "Open valve A and close valve B" or was it the other
way round?
3. This whole plant will be running under Win95 tomorrow.
4. HEY! Is smoke coming out of the core normal?
5. Who forgot to pay the water bill?
6. We got 12 seconds to WHAT????
7. Meet your new plan superintendent: Bozo the clown.
8. A leak? Can't you fix it with duct tape or something?
9. Oh yeah! 50 bucks says I can make it blow.
10. It's |
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c********i
发帖数: 1489 | 35 【 以下文字转载自 Texas 讨论区 】
发信人: cincinnati (星夜), 信区: Texas
标 题: 图：NASA的幽默感
发信站: BBS 未名空间站 (Sat Dec 4 23:08:56 2010, 美东)
给Visitor的试题
Q,
What does the Apollo Fuel Cell use to generate power?
A. Solar energy
B. Liquid oxygen & liquid nitrogen
C. The fission of uranium
D. Hamsters running on wheels
这是只多么勤劳聚能的小白鼠^ ^
Q,
What kind of fuel did Robert Goddard use in his rocket?
A. Solid fuel
B. Anti-matter
C. Liquid fuel
D. There was no fuel: he used a large sling-shot
好强悍的弹弓~~~~
真相在此 |
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a******o
发帖数: 16625 | 36 【 以下文字转载自 Military 讨论区 】
发信人: LindaLiao (梅影清吟), 信区: Military
标 题: 世界历史上最有成就的五十名物理学家。
发信站: BBS 未名空间站 (Sun Apr 8 17:18:35 2012, 美东)
1. Isaac Newton - English. Quantified and Qualified laws of motion and
gravity. Invented the reflecting telescope. Explained the concept of light
dispersion and co-invented the Calculus.
2. Albert Einstein - German/Swiss/American - Developed Theories of Special
and General Relativity. Described Brownian Motion. Nobel Prize winner for
his work on the photoelectric ef... 阅读全帖 |
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H******7
发帖数: 34403 | 37 The device is 2x2x4 meters in size. It is cylindrical shaped. It has a
vacuum inside with high magnetic fields, made using electromagnets.
Uncharged deuterium gas is injected. It is heated using radio waves, in much
the same way a microwave heats food. When the gas temperature reaches over
16 electron-volts, the gas ionizes into ions and electrons. This plasma
exerts a pressure on the surrounding magnetic fields. This plasma pressure
is counterbalanced by the magnetic field pressure in a beta ra... 阅读全帖 |
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d********f
发帖数: 43471 | 38 不用等通告了，洛马自己都把这条新闻给撤了。其实这个完全是口音问题，法国人分不
清fusion fission,文科女记者胡写了一通，全球知名nc媒体漏透社就胡发了一篇 |
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H********g
发帖数: 43926 | 40 2013年有研究
http://www.cell.com/current-biology/abstract/S0960-9822%2813%29
基本上说裂殖酵母只要不得老年痴呆就不会老也不会死。
Results
We performed a complete pedigree analysis of microcolonies of the fission
yeast Schizosaccharomyces pombe growing from a single cell. When cells were
grown under favorable conditions, none of the lineages exhibited aging,
which is defined as a consecutive increase in division time and increased
death probability. Under favorable conditions, few cells died, and their
death was random and sud... 阅读全帖 |
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q********g
发帖数: 10694 | 41 圣经无谬误的重要
在基督教教会的整个历史进程里，圣经均被视为原本由神所赐，绝无错误；这种信
念是信徒们所接纳的。除却那些与教会决裂，自立门户的异端以外，信徒都公认圣经拥
有完全的权威，所提及的一切事件一一包括神学上的、历史及科学上的，均属全然可信
。宗教改革期间，路德坚称：「当圣经说话，神就说话。」纵使反对路德的罗马天主教
，亦持守这个信念，虽然他们意图将教会传统置于与圣经等同的地位上。从昔日使徒保
罗所要与之抗辩的诺斯底主义开始，以至十八世纪自然神论冒升以前，都没有对圣经的
无谬误有所质疑。纵然是苏西尼(Socinus)及瑟维特(Michael Servetus)这些神体一位
论者(Unitarians；只信仰独一的真神，否认基督的神格及三一教义)，也根据圣经无谬
误来为自己的立场辩护。
但到了公元十八世纪，理性主义及自然神论兴起，圣经无谬误的地位便急转直下。
自然神论者与维护历史上基督信仰的正统派辩护者从此便划清界线。时至十九世纪，在
复原宗内居领导地位的学者，愈来愈多反对圣经的超自然事迹；这种风气促使美洲及欧
洲的「历史批判」兴起。充满着理性的读者们，都假设圣经纯粹是人类将有关宗... 阅读全帖 |
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G******i
发帖数: 9 | 42 【 以下文字转载自 Church 俱乐部 】
发信人: Geshandi (歌珊地), 信区: Church
标 题: 圣经的默示和无误
发信站: BBS 未名空间站 (Mon Apr 30 21:01:55 2012, 美东)
圣经的默示和无误
教会宣稱圣经是神准确无误的默示。圣经是神藉着圣灵，透过人的写作，将祂的话赐给
我们。这种默示，并非是一句字一句的在默寫，神在默示时，使用了作者们各自的性格
和不同的文体寫成。无误说明圣经的全部，包括原稿的每一个字，都是无谬无误的。在
此还有另外一种看法，该观点认为圣经的默示和无误是针对它的原稿来说的，而非如今
的抄本与译本。也就是说，圣经原稿是无谬无误的。但是很抱歉的是，如今的抄本，其
中存在一些错误。
所以，当圣经批评者指出圣经中明显错误矛盾時，是因为他们不理解神的启示或是他们
遇到抄寫本上的错误。事实上许多版本的圣经存在印刷错误。请记住，圣经原稿是默示
无误的，而并非以后的抄本。我们现在阅读的圣经是原稿的抄本。这些抄本不能保证是
神无谬无误的默示，也就是说，不能百分百的保证这些文本的准确性。这是否表明我们
不能相信圣经？当然不是，圣经的... 阅读全帖 |
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t****e
发帖数: 2737 | 43 http://carm.org/languages/chinese/%E5%9C%A3%E7%BB%8F%E7%9A%84%E
教会宣稱圣经是神准确无误的默示。圣经是神藉着圣灵，透过人的写作，将祂的话赐给
我们。这种默示，并非是一句字一句的在默寫，神在默示时，使用了作者们各自的性格
和不同的文体寫成。无误说明圣经的全部，包括原稿的每一个字，都是无谬无误的。在
此还有另外一种看法，该观点认为圣经的默示和无误是针对它的原稿来说的，而非如今
的抄本与译本。也就是说，圣经原稿是无谬无误的。但是很抱歉的是，如今的抄本，其
中存在一些错误。
所以，当圣经批评者指出圣经中明显错误矛盾時，是因为他们不理解神的启示或是他们
遇到抄寫本上的错误。事实上许多版本的圣经存在印刷错误。请记住，圣经原稿是默示
无误的，而并非以后的抄本。我们现在阅读的圣经是原稿的抄本。这些抄本不能保证是
神无谬无误的默示，也就是说，不能百分百的保证这些文本的准确性。这是否表明我们
不能相信圣经？当然不是，圣经的副本与原稿有98.5%的相似度。而另外1.5%的差异已
意义不大，只是偶然的抄寫错误，或少数漏掉“the,but”等词。这... 阅读全帖 |
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j*******7
发帖数: 6300 | 44 http://carm.org/languages/chinese/%E5%9C%A3%E7%BB%8F%E7%9A%84%E
圣经的默示和无误
教会宣稱圣经是神准确无误的默示。圣经是神藉着圣灵，透过人的写作，将祂的话赐给
我们。这种默示，并非是一句字一句的在默寫，神在默示时，使用了作者们各自的性格
和不同的文体寫成。无误说明圣经的全部，包括原稿的每一个字，都是无谬无误的。在
此还有另外一种看法，该观点认为圣经的默示和无误是针对它的原稿来说的，而非如今
的抄本与译本。也就是说，圣经原稿是无谬无误的。但是很抱歉的是，如今的抄本，其
中存在一些错误。
所以，当圣经批评者指出圣经中明显错误矛盾時，是因为他们不理解神的启示或是他们
遇到抄寫本上的错误。事实上许多版本的圣经存在印刷错误。请记住，圣经原稿是默示
无误的，而并非以后的抄本。我们现在阅读的圣经是原稿的抄本。这些抄本不能保证是
神无谬无误的默示，也就是说，不能百分百的保证这些文本的准确性。这是否表明我们
不能相信圣经？当然不是，圣经的副本与原稿有98.5%的相似度。而另外1.5%的差异已
意义不大，只是偶然的抄寫错误，或少数漏掉“the... 阅读全帖 |
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v**s
发帖数: 1 | 45 History about Physics II:
Physics II was orignally called Nuclear Science, it had two majors: nuclear
physics and radioactive chemistry. And a side knowledge, to build a nuclear
bomb, you need radioactive chemistry technology to get pure uranium isotope,
and nuclear physics to make uranium fission happen. This department used to
get the most brilliant students, and believe me, they once had prettiest girls
in Fudan also.
I have no idea how this department has anything to do with enviroment scien |
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w*********l
发帖数: 1337 | 46 有很多编译的技术，比如loop unrolling, loop fusion, loop fission
体系结构上也能把没有dependency的操作并行用不同的alu来算。而且即使有
dependency也能用speculation来打掉，并行算。所以这种性能预测很难说啊。
b， |
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h******b
发帖数: 312 | 47 Science. 2003 May 16;300(5622):1152-5.
Distinct cohesin complexes organize meiotic chromosome domains.
Kitajima TS, Yokobayashi S, Yamamoto M, Watanabe Y.
Department of Biophysics and Biochemistry, Graduate School of Science,
University of Tokyo, Tokyo 113-0033, Japan.
Meiotic cohesin complexes at centromeres behave differently from those along
chromosome arms, but the basis for these differences has remained elusive. The
fission yeast cohesin molecule Rec8 largely replaces its mitotic counterpa |
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n*7
发帖数: 51 | 48 Shirodkar, S., M. Ewen, J. A. DeCaprio, J. Morgan, D. M. Livingston, and
T. Chittenden. "The Transcription Factor E2F Interacts with the
Retinoblastoma Product and a p107-Cyclin A Complex in a Cell Cycle-
Regulated Manner." Cell 68, no. 1 (1992): 157-166.
Hayles, J., D. Fisher, A. Woollard, and P. Nurse. "Temporal Order of S
Phase and Mitosis in Fission Yeast Is Determined by the State of the
p34cdc2 Mitotic B Cyclin Complex." Cell 78, no. 5 (1994): 813-822.
oaixil AT hotmail.com |
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