k*******n
发帖数: 5546 | 1 Horseshoe trumps chevron, because you can actually look through the reticle
pattern to shoot and the outer portion of the horseshoe gives you a no-crap
200m range estimation capability. W/chevron, you have to sorta guess for
200m and either remember to use the lower/inner apex (what Marines call the
crotch of the RCO, because we're disgusting) for aimpoint or remember to
hold the tip of the chevron 2-4" inches high (based upon what ammo you use
and whether or not you did a no-BS 100 METER zero l... 阅读全帖 |
|
w*******4
发帖数: 300 | 2 http://en.wikipedia.org/wiki/Sunscreen
物理防晒主要是ZnO 和TiO2 的nanoparticle 直接反射紫外线,直径从几十到几百
nanometer不等。比较稳定，但容易显白。个人经验，氧化钛比氧化锌更容易显白。比
较适合敏感皮肤。
化学防晒主要成分是芳香族化合物，在紫外区有吸收。大都不会变白，但没那么稳定。
而且不适合敏感皮，会长痘痘，发红甚至刺痛。 |
|
z****6
发帖数: 10776 | 3 算吧？
http://en.wikipedia.org/wiki/CMOS
Aluminum was once used but now the material is polysilicon. Other metal
gates have made a comeback with the advent of high-k dielectric materials in
the CMOS process, as announced by IBM and Intel for the 45 nanometer node
and beyond |
|
g*******n
发帖数: 1188 | 4 Part and parcel of Intel's 22-nanometer tech is the 3D "tri-gate" transistor
(see image below). Intel claims tri-gate tech allows an "unprecedented"
combination of power savings and performance gains that will allow the
perpetuation of Moore's law for "years to come," according to a statement by
the company.
为啥还是觉得很挣扎呢 |
|
s******3
发帖数: 1767 | 5 Fixed in aldehyde and osmium, then serial dehydration in ethanol, critical
point drying in liquid CO2, then coated with gold of 30 nanometer thickness
to make sample conductive. 在SEM下拍照只是最后的一步,也是最有趣的一步... 我
们也能做cryoSEM，不过不常用，Leica的东西太不reliable，200K买的cryoSEM
station老是出问题。 |
|
m*******n
发帖数: 519 | 6 楼主开贴吊打佳能，楼上拉出泥坑垫背，乌鸦嘴说老尼要破产，这让多年在尼家烧钱的
索男回家咋向领导交代？
前两天在DPReview上看媒体走访佳能本土做L镜头的工厂参观报道，真的是做精品的干
活，有些制作精度+/-30纳米，“Canon claims a tolerance of +/-30 nanometers.
As such, if one of the finished elements were scaled up to the size of an
Olympic stadium, the surface variation would be no thicker than a plastic
grocery bag.”
索尼A7系机身玩家要是接个作坊加工出来的转接头，接上L 镜头，照出来说不锐，嘿
嘿，转接环的精度能到多少? 反正我是没看到BH上有提。
话说回来，泥坑卖专业镜头，光学望远镜，卖瞄准镜应该是没少赚钱吧，做相机基本
都是从供应商拿部件回来组装，里面的东西都是两年前的概念了，索尼卖不卖高端
sensor，首先坑的是自家的销售老总和底下的account sal... 阅读全帖 |
|
m*******n
发帖数: 519 | 7 楼主开贴吊打佳能，楼上拉出泥坑垫背，乌鸦嘴说老尼要破产，这让多年在尼家烧钱的
索男回家咋向领导交代？
前两天在DPReview上看媒体走访佳能本土做L镜头的工厂参观报道，真的是做精品的干
活，有些制作精度+/-30纳米，“Canon claims a tolerance of +/-30 nanometers.
As such, if one of the finished elements were scaled up to the size of an
Olympic stadium, the surface variation would be no thicker than a plastic
grocery bag.”
索尼A7系机身玩家要是接个作坊加工出来的转接头，接上L 镜头，照出来说不锐，嘿
嘿，转接环的精度能到多少? 反正我是没看到BH上有提。
话说回来，泥坑卖专业镜头，光学望远镜，卖瞄准镜应该是没少赚钱吧，做相机基本
都是从供应商拿部件回来组装，里面的东西都是两年前的概念了，索尼卖不卖高端
sensor，首先坑的是自家的销售老总和底下的account sal... 阅读全帖 |
|
f**********r
发帖数: 18251 | 8 【 以下文字转载自 Military 讨论区 】
发信人: smartkevin (PE), 信区: Military
标 题: Re: 普鲁士蓝解毒机理
发信站: BBS 未名空间站 (Wed May 1 11:49:11 2013, 美东)
为什么一帮人就喜欢动嘴皮子不喜欢动手狗一下？明明说了是Fe4[Fe(CN)6]3，哪来的
钾？
https://en.wikipedia.org/wiki/Prussian_blue
Prussian blue
From Wikipedia, the free encyclopedia
This article is about the pigment. For the musical duo, see Prussian Blue.
See also: Midnight blue
Prussian blue
IUPAC name[hide]
Iron(II,III) hexacyanoferrate(II,III)
Other names[hide]
Berlin blue
Ferric ferrocyanide
Ferric hexacy... 阅读全帖 |
|
H********g
发帖数: 43926 | 9 所以按wikipedia的说法，本生灯不开氧气门的时候会产生很小的碳粒，它的热辐射（
白炽发光）产生黄光。
氧气打开之后，产生的碳粒非常少，剧烈的氧化反应产生大量被激发的自由基（主要是
CH），发射蓝光。
http://en.wikipedia.org/wiki/Flame#Flame_color
In a laboratory under normal gravity conditions and with a closed oxygen
valve, a Bunsen burner burns with yellow flame (also called a safety flame)
at around 1,000 °C (1,800 °F). This is due to incandescence of very fine
soot particles that are produced in the flame. With increasing oxygen supply
, less black body-radiating soot is produced due to... 阅读全帖 |
|
g*****o
发帖数: 930 | 10 (03/13/2007 7:05 AM EDT)
SHANGHAI — Intel Corp has won approval to build a $2.5 billion, 12-inch
wafer plant in northern China for CPU chip sets, according to a statement
issued Tuesday from China's National Development and Reform Commission.
The plant would use 90-nanometer technology and produce 52,000 wafers a
month at full capacity, according to the NDRC, which is China's top planning
group. The plan calls for the fab to be in the city of Dalian.
Little more was known, but sources familiar w |
|
G****e
发帖数: 11198 | 11 introduction:
http://chem.berkeley.edu/people/faculty/xu/xu.html
group page:
http://www.mse.berkeley.edu/groups/xu/index.htm
Research Interests: Polymers, Biomaterials, Materials Chemistry
The key to future technology is the design and fabrication of functional materials having structures ordered down to the molecular level. This goal can't be reached by conventional "top-down" approaches and remains as the "holy grail" using synthetic materials such as block copolymers. In addition, there have ... 阅读全帖 |
|
B**T
发帖数: 294 | 12 祝贺！
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable progre: ss has
been made in de novo protein design and various peptides ha... 阅读全帖 |
|
T****n
发帖数: 2195 | 13 06年出去那个MIT的不知道怎么样了。
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable progre: ss has
been made in de novo protein design and var... 阅读全帖 |
|
m*********e
发帖数: 216 | 14 不是大工的，也来凑个热闹，祝贺一下。
再批评一句：不就是个伯克利的aP（小写的a，不是大写的A），至于吗？让这个藤那个
藤的AP， P们情何以堪？
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable prog... 阅读全帖 |
|
c********n
发帖数: 1065 | 15 你们怎么不去看看这个姐姐的老公是谁
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable progre: ss has
been made in de novo protein design and vario... 阅读全帖 |
|
m*********e
发帖数: 216 | 16 不是大工的，也来凑个热闹，祝贺一下。
再批评一句：不就是个伯克利的aP（小写的a，不是大写的A），至于吗？让这个藤那个
藤的AP， P们情何以堪？
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable prog... 阅读全帖 |
|
c********n
发帖数: 1065 | 17 你们怎么不去看看这个姐姐的老公是谁
materials having structures ordered down to the molecular level. This goal
can't be reached by conventional "top-down" approaches and remains as the "
holy grail" using synthetic materials such as block copolymers. In addition,
there have been limitations in the functionalization of these
nanostructured materials. On the other hand, nature has made a dizzying
array of materials using a few building blocks. Remarkable progre: ss has
been made in de novo protein design and vario... 阅读全帖 |
|
j****u
发帖数: 1413 | 18 李巨：徜徉在量子材料世界
新闻原文与照片请见：http://www.ustcif.org/default.php/content/1464/
2012年10月10日，麻省理工学院（以下简称MIT）以其官方网站首页封面图片方式报道
中国科大90级少年班校友李巨教授的成就。 当地时间11日，中国科大校友新创基金会
致电李巨教授表示祝贺。李巨教授提及已得知“再战北马，捐赠海外交流”行动，“一
定要支持”。随即李巨教授立即在中国科大捐赠网（GIVING.USTC.EDU.CN）捐赠感谢母
校的教育。他还祝福母校“ I wish USTC great success in the campaign.”。
图为2012年10月10日，MIT网站首页今日聚焦以全页封面报道方式介绍李巨。
《徜徉在量子材料世界》介绍了李巨教授获得的成果。文章称，李巨从原子尺度设计出
的新材料，在未来新能源领域有着应用。李巨成功了设计了全球最小的电池。该文特别
介绍李巨从他在中国科学技术大学的大学生活，并介绍说：他在中国科大培养了对电子
工程与计算机科学的浓厚兴趣。这些兴趣引导了李巨教授使用材料的计算机仿真手段去
了解如... 阅读全帖 |
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l*********u
发帖数: 19053 | 19 【 以下文字转载自 JobHunting 讨论区 】
发信人: tarn (空心), 信区: JobHunting
标 题: Intel Dalian Sr Data Scientist Position
关键字: data scientist
发信站: BBS 未名空间站 (Thu Dec 24 23:31:30 2015, 美东)
Job Description
Intel Dalian Fab68 site will produce its latest 3D NAND technology. Fab68
has been in operation since 2010 producing 65-nanometer products for Intel.
The collaboration with the Dalian government has been and continues to be an
excellent partnership. We have a long term plan for this facility and may
invest up to ... 阅读全帖 |
|
y*m
发帖数: 60 | 20 IBM fabricating 90nm G5s in volume, sources say
Dec 04 2003
05:00 PM EST
Continuing with the ever-growing saga developing around Apple's Power Mac G5
update roadmap, sources today provided AppleInsider with positive news on
IBM's progress with its 90 nanometer (nm) G5 microprocessor. The 90nm G5 has
been rumored as the chip to elevate Apple's Power Mac G5 product-line beyond
the 2GHz barrier and into its first major revision.
IBM, as recently as this week, has begun the process of fabricating 90 |
|
y*m
发帖数: 60 | 21 Sources confirm 90nm PowerPC G5 next month, add details
By Kasper Jade
12-05-2003
12:00 PM EST
IBM will, indeed, begin delivering volume quantities of its new 90-nanometer
(nm) based PowerPC 970 G5 to Apple Computer next month, sources confirmed last
evening. These new microprocessors are rumored to become the brains behind the
first revision to Apple's Power Mac G5 desktop computer line -- known to
sources solely by the reference tag 'Power Mac 8,1.'
Up until now, the 90nm G5 has unofficially b |
|
y*m
发帖数: 60 | 22 Sources comment on IBM's 65-nm process, plans
Dec 15 2003
12:00 PM EST
About 10 months ago, IBM began to layout the foundation for a major
architectural revamp to the PowerPC line that will allow chips to run much
cooler for mobile and embedded applications, sources recently told
AppleInsider.
The first fruits of the endeavorer are rumored to include a 64-bit PowerPC 300
series built on a 65-nanometer (nm) process. The series will reportedly
tip-off with the PowerPC 350 due out in mid-2005, and |
|
w********1
发帖数: 3492 | 23 Fri, 06 Jul 2012 13:10:29 PDT
One of the main criticisms of the new Thunderbolt connectivity standard
embraced by Apple has been its cost, which adds a considerable premium to
the prices of compatible peripherals. Even Thunderbolt cables are expensive
, with Apple's 2-meter cable priced at $49, a price on par with
offerings from the few other companies selling Thunderbolt cables so far.
In a report published earlier this week, Ars Technica took a look at why the
cables are so expensive and ... 阅读全帖 |
|
w*****g
发帖数: 16352 | 24 about the gap, how many nanometers is that. |
|
c**i
发帖数: 6973 | 25 Andrew Pollack and Steve Lohr, The Chip That Powers Cars; A Japanese plant
struggles to produce a critical auto part. New York Times, Apr 28, 2011 (
title in print).
http://www.nytimes.com/2011/04/28/business
/global/28chip.html?scp=1&sq=chip%20car&st=cse
Quote:
"It Renesas] is also farming out some manufacturing of automobile
controllers to GlobalFoundries, a contract manufacturer in Singapore that
has produced microcontrollers in the past
"In automobile microcontrollers, Renesas’s main competi... 阅读全帖 |
|
N****w
发帖数: 21578 | 26 test chip about 400Kbits... 50KB hoho
Using that technique, the IBM scientists were able to mitigate drift and
demonstrate long- term retention of bits stored in a subarray of 200,000
cells of their PCM test chip, fabricated in 90-nanometer CMOS technology. |
|
c**i
发帖数: 6973 | 27 John Kell, AMD Warns of Weakness; Blames German Factory. Wall Street Journal
, Sept 29, 2011.
The entirety of the report is as follows.
"Advanced Micro Devices Inc trimmed its revenue and gross margin estimates
for the fiscal third quarter, in part citing manufacturing issues at a
German factory that limited supply of the Llano chip.
"AMD--which makes semiconductors that serve as calculating engines in
computers, serves and game consoles--now sees third-quarter revenue rising 4
% to 6% on a sequ... 阅读全帖 |
|
|
i***e
发帖数: 11 | 29 Diffracted X-ray laser contains phase information.So theoretically, one
molecule should be enough to obtain the whole 3D structure. But proteins are
too fragile in Xray laser (the radiation damage), therefore crystals are
still required right now. One the other hand, big crystals (consist of
millions of unit cells)make computation too complicated, even impossible. So
the size of the crystal is critical. Tens of unit cells right now are the
proper size which has the scale of nanometer. If you do |
|
o2
发帖数: 2764 | 30 What can I say, newbie always has good imagination and criticize for other
people. Many other IDs already explained the x-ray requirement. I am not
saying you can't "construct structure model" based on "单分子的衍射结果",
the question is how to get? Single particle diffraction is another choice (
not only based on X-ray), but right now it is nanometer range.
I welcome all comments but please do your homework 1st.
size |
|
J******r
发帖数: 2806 | 31 he was studying nanometer tech... should be hot
btw, what's 二向箔? |
|
A********o
发帖数: 1307 | 32 Min-Kyeong Yeo,Misook Kang. Effects of Cu x TiO y nanometer particles on
biological toxicity during zebrafish embryogenesis. Korean Journal of
Chemical Engineering, May 2009, Volume 26, Issue 3, pp 711-718
h*****[email protected] Thanks |
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s**i
发帖数: 4448 | 33 你需要有对化学反应的基本概念。知道在分子水平，events的发生(化学键的形成和断
裂）是以 nano-second， 甚至pico-second来计量的？
体会一下这个时间和年，万年，百万年，亿年等时间单位之间的巨大差异。
再想一下分子的size? 是nanometer的级别。需要非常小的空间，很短的时间，就可以
有多少化学events发生，被选择？ |
|
C*********h
发帖数: 83 | 34 【赛先生独家新闻】华人科学家有同等工作却未获今天诺贝尔化学奖
2014-10-08 按蓝字加我好友 赛先生
原文：
http://mp.weixin.qq.com/s?__biz=MzA3OTgzMzUzOA==&mid=200920471&
一小时前，瑞典皇家科学院宣布2014年诺贝尔化学奖授予三位在光学成像的科学家，美
国休斯医学研究所的Eric Betzig(贝慈葛)、德国马普生物物理化学研究所的Stefan
Hell(黑尔)、和美国斯坦福大学的William Moerner(莫尔纳)，表彰他们在“发展超高
分辨荧光显微镜”上的贡献。
消息公布使很多人感到惊讶。其中，特别令人惋惜贝慈葛的工作不仅与华人教授庄小威
的工作在物理原理完全一样，而且他们研究论文发表的时间也一样，令人不解为何出现
厚此薄彼。
得奖的工作反映现代科学的交叉：实际上是物理学研究、目的是观察化学分子、用途是
生物医学研究，所以横跨物理、化学和生物。
得奖工作的核心概念和技术都是物理，颁发化学奖颇出人意料。
超高分辨荧光显微镜的发明突破了光学衍射极限(0.2微米)，使科学家可以观察到更小
的结构，推动了人类从分子... 阅读全帖 |
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k***i
发帖数: 662 | 35 我觉得那是因为
1、他们为了找NSF拉钱；
2、单元操作已经有一套可以参考的模板，对常规反应，总能找到办法扩大生产。如果发现新的反应，总能找到办法放大，所以化工自己的田已经种得差不多了，有人就去抢别人的田了。（这么说绝不代表化工的课题已经研究透了，因为每一种新的化学反应出来，总有相应的放大值得研究。）
但是回顾历史，化工的影响，还是只有大规模生产才能体现。只能在实验室里搞的东西，不是化工关注的重心。当合成氨从实验室走到工厂，就意味着炸药和化肥绝不再是少数人小打小闹的东西了；当青霉素从生物学家的培养皿里变成大规模生产的时候，人类的寿命普遍得到提高就不再是梦想。当单个炼油厂能年产数百万吨汽柴油以及乙烯丙烯，整个国家有几十个这样的炼油厂，就意味着这个国家进入了现代化工产品的社会(否则哪怕连塑料袋也消费不起)。显然，在实验室里得到一点点合成氨、培养一点点青霉素、提炼一点点汽柴油，绝不是难事。但对社会的影响很大么？
只要涉及大规模生产就必须考虑化工本身的核心问题：
三传一反外加单元操作。这里涉及这样几个尺度概念：
1、Length scale: from atomic/nanometer to |
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s******n
发帖数: 179 | 36 topic是Novel Two-Dimensional Nanomaterials and Their Electronic and
Spintronic Applications。 我们欢迎任何形式和相关内容的投稿，这个期刊是open
access的期刊，SCI检索，影响因子1.6。 如果您和您的朋友有paper打算投到我们这里
，我非常欢迎~ 也请大家帮忙把我的这个email转发给您的同事，前/现学生，和朋友，
帮我们广而告之哈~
多谢大家了~
weblink: http://www.hindawi.com/journals/jnm/si/738421/cfp/
Novel Two-Dimensional Nanomaterials and Their Electronic and Spintronic
Applications
Call for Papers
The quickening pace of CMOS technology scaling is accelerating the
introduction of emerging and thriving nanomat... 阅读全帖 |
|
N**k
发帖数: 1522 | 37 please mail to m******[email protected]
thanks!
J. Phys. Chem. C, 2007, 111 (19), pp 7200–7206
Electrochromic Stability of WO3 Thin Films with Nanometer-Scale Periodicity
and Varying Degrees of Crystallinity |
|
r********n
发帖数: 149 | 38 http://pubs.acs.org/doi/abs/10.1021/ja2005708
Three-dimensional colloidal crystals made of
ferromagnetic particles, such as magnetite (Fe3O4), cannot
be synthesized in principle because of the strong attractive
magnetic interaction. However, we discovered colloidal
crystals composed of polyhedral magnetite nanocrystallites
of uniform size in the range of a few hundred nanometers in
the Tagish Lake meteorite. Those colloidal crystals were
formed 4.6 billion years ago and thus are much older than
... 阅读全帖 |
|
|
h***o
发帖数: 350 | 40 Temperature Characteristics of Raman Spectra in Nanometer Material Titanium
Dioxide
Wu Xijun1,2, Zhang Ming-sheng1, Yin Zhen1,3, Ji Xiaoli1,4 and Chen Qiang1
1994 Chinese Phys. Lett. 11 685
doi:10.1088/0256-307X/11/11/008
http://iopscience.iop.org/0256-307X/11/11/008
Thank you very much! |
|
|
h***o
发帖数: 350 | 42 Preparation of Nanometer ZnTiO_3 Powder and Its Catalytic Performance for
Thermal Decomposition of Ammoniam Perchlorate
YANG Xing-Hao ZHANG Jing-Lin WANG Zuo-Shan
(Chemical Industry and Ecology Institute of North University of China,
Taiyuan 030051)
Link:
http://en.cnki.com.cn/Article_en/CJFDTOTAL-WJHX200911031.htm
Thank you very much. |
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s******n
发帖数: 179 | 43 topic是Novel Two-Dimensional Nanomaterials and Their Electronic and
Spintronic Applications。 我们欢迎任何形式和相关内容的投稿，这个期刊是open
access的期刊，SCI检索，影响因子1.6。 如果您和您的朋友有paper打算投到我们这里
，我非常欢迎~ 也请大家帮忙把我的这个email转发给您的同事，前/现学生，和朋友，
帮我们广而告之哈~
多谢大家了~
weblink: http://www.hindawi.com/journals/jnm/si/738421/cfp/
Novel Two-Dimensional Nanomaterials and Their Electronic and Spintronic
Applications
Call for Papers
The quickening pace of CMOS technology scaling is accelerating the
introduction of emerging and thriving nanomat... 阅读全帖 |
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c****m
发帖数: 91 | 44
How about Magnetic Resonance Force Microscopy? I think John Sidles will be a
strong candidate for NB if MOSAIC program succeeds.
Quote from J Sidles' proposal:
"Magnetic resonance force microscopy (MRFM) is a new quantum sensing
technology for the direct, nondestructive imaging of atomic structure.
This sensing capability would serve a broad spectrum of Defense
interests, including advanced material development, nanometer-scale
electronics, and biological warfare defense. We propose a two-year |
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s*****r
发帖数: 847 | 45 标注一下，我是转贴而已哦
有兴趣的跟flyinmeteor联系哈
【 以下文字转载自 JobHunting 讨论区 】
发信人: flyinmeteor (raindance), 信区: JobHunting
标 题: netlogic opening - physical design engineer in CPU group
发信站: BBS 未名空间站 (Thu Oct 21 02:53:18 2010, 美东)
今天manager突然说可以找fresh grad. 如果觉得fit的话, 跟我联系
This position requires an understanding of RTL to GDS flows, CMOS device
operation and advanced layout rules.
Responsibilities:
Ownership of design floor planning, synthesis, DFT, place and route,
clock and power distribution, static timing an... 阅读全帖 |
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