t*****r
发帖数: 4431 | 1 太长了，我也没看完，感兴趣的读读吧。
If you cancel, you pay. If they cancel, you still pay——The travel industry
’s one-sided cancellation policies are due for cancellation
Change your mind when you’re traveling, and the consequences can be costly.
Most airline tickets are nonrefundable and require a hefty change fee plus
any fare differential. And many hotel rooms are totally nonrefundable and
nonchangeable, so you could lose the entire value of your room. So, why
doesn’t it work the other way around?
After Alask... 阅读全帖 |
|
e******1
发帖数: 149 | 2 这个是newsweek排得，标准如下
The full methodology and weighting is as follows:
Four-year, on-time graduation rate (25 percent): Based on the standards set
forth by the National Governors Association, this is calculated by dividing
the number of graduates in 2012 by the number of ninth graders in 2008, plus
transfers in, minus transfers out. Unlike other formulas, this does not
count students who took longer than four years to complete high school. We
accepted 2011 grad rates from districts that had not ye... 阅读全帖 |
|
z****i
发帖数: 19707 | 3 版主:假如你认为,这广告不合适,让我知道,我可以修改.
用过两次
价格:$40.00(包邮费)
站内联系
介绍如下:
Tamrac 3548 Express Pack 8 - for Digital SLR Outfit with 2 Lenses and
Accessorie
The Tamrac 3548 Express Pack 8 Backpack is a padded PolyTek two compartment
bag made to carry a digital SLR camera outfit with 2 lenses, flash and
accessories. The fully foam padded lower compartment with adjustable, foam-
padded dividers protects and provides a custom fit to a digital or film SLR.
The top compartment is made for personal items. A large fron... 阅读全帖 |
|
L*******r
发帖数: 5448 | 4 哦，应该是啊，这是精华区的
+- -+
| (COMP% - 30) (GAIN - 3) TD% (9.5 - INT%) |
| ------------ + ---------- + --- + ------------ |
RATE = 100 * | 20 4 5 4 |
| ---------------------------------------------------- |
| 6 |
+- ... 阅读全帖 |
|
m***e
发帖数: 991 | 5 此帖献给最爱的科罗拉多的夏天。
San Juan Mt.位于科州的西南角，据称是科州最人迹罕至但风景最优美的山脉。前年夏
天开车去过一次，从此念念不忘。 说服了爬山伙伴小A，我们决定要into the wild。
本来没打算带小朋友， 无奈找不到合适的babysitter，再加上小朋友死乞白赖，苦苦
哀求。我心想不过是多走一天，或者少爬一个14er，就当路上多带个玩具解闷儿吧。
于是，我们两个半人，小A,我，和我家7岁话痨小朋友开始了六天五夜的探险。路程从
Elk Park顺时针到Needleton，总共大致50迈，两上两下，海拔从8700ft->12500ft-
>8000ft->12,000ft->7,800ft。分享一下路上的美景，既开心又悲催的经历
。有兴趣backpacking的同学欢迎讨论一下gear，路线安排，以及multi-day食物准备等
等。
Day 0 （7/23） Durango->Mesa Verde National Park
中午到达Durango，顺便拜访一下距城以西40分钟车程的Mesa Verde National Park.
Mesa Verde ... 阅读全帖 |
|
a***n
发帖数: 584 | 6 当天在Elk Park，从蒸汽小火车下来的时候，环顾四周，只有我，火车上的游客，和幽
静的山林。那感觉颇为奇特。
Day 1 - 2 入山，向上
Elk Creek Trail -> Continental Divide Trail
Distance： 10.4 miles
Elevation gain/loss： 4500/1600 feet
Elk Creek Trail 的入口就在铁轨旁边，一不小心就容易错过。
开始的几英里都是缓慢的上坡路。走起来，很舒服。
当快到一个小池塘的时候，我这不速之客，终于被盯上了。一头年轻的驼鹿竟然就沿着
小路低头向我跑过来。
直到后来在小池边休息时，我看着它在那儿开心的啃着青草，又看了看自己手上的肉干
，还是没搞明白到底谁是肉食性动物。
第二天，也是一个晴天。继续走着上坡路。大的动物没怎么见到，小的却有一些。
渐渐的，顺着山花和小溪，心慢慢的随着周围的声音安静下来。
Elk Creek Trail 和 Continental Divide Trail 的交接点是一个长满了野花的大草坡。
在这儿，我碰到了一些背包客。... 阅读全帖 |
|
l***h
发帖数: 9308 | 7 我记得以前给过一个术语链接在某个置项贴里面，可能归档了吧，再贴一下，新人不懂
的可以参考一下
http://www.runnersworld.com/community/forums/runner-communities
Your friendly beginning runner's guide to .... runner's jargon.
You'll notice we don't have a FAQ here -- that's because we want you to ask
your questions, join in, become part of the community! That said, I am sure
new runners get overwhelmed by phrases we throw around all the time here
with impunity; you probably think we're all speaking some strange language.
To follow along here, ... 阅读全帖 |
|
W***i
发帖数: 833 | 8 算了，我还是再贴一遍，
Your friendly beginning runner's guide to .... runner's jargon.
You'll notice we don't have a FAQ here -- that's because we want you to ask
your questions, join in, become part of the community! That said, I am sure
new runners get overwhelmed by phrases we throw around all the time here wit
h impunity; you probably think we're all speaking some strange language. To
follow along here, it's really helpful just to know some general stuff and w
hat terms mean. So in the interest of hel... 阅读全帖 |
|
|
l***h
发帖数: 9308 | 9 marathon pace
跑步黑话大全
Your friendly beginning runner's guide to .... runner's jargon. Cool
You'll notice we don't have a FAQ here -- that's because we want you to ask
your questions, join in, become part of the community! That said, I am sure
new runners get overwhelmed by phrases we throw around all the time here wit
h impunity; you probably think we're all speaking some strange language. To
follow along here, it's really helpful just to know some general stuff and w
hat terms mean. So in the in... 阅读全帖 |
|
c****e
发帖数: 3522 | 10 sorry, this is 2013
following is the 2014
2014 MNB Lotto Drawing for Group and Schedule
Texas Lotto in ascending order on May 7
th Wednesday as posted on www.txlottery.org will be used for the
drawing.
Mock Lottery: 1-11-27-29-36-53 (used below as an example)
Tier #1: Tang, HCU
Tier #2. Yanhuang, HPR
Tier #3. Dragon, Tsinghua, UTSC
The seeding is based on the results of last year.
There will be two groups. Group I is the 3-team group. Group II is the 4-
team group;
First, one of three teams in T... 阅读全帖 |
|
p*******e
发帖数: 986 | 11 献给陪我走过我的青葱岁月的MITBBS，10岁生日快乐!
车子终于驶上了开往teton的公路，离开黄石，我们是那么地恋恋不舍。在快出公园南
门的地方的路东边有一个牌子，上写着 Continental Divide. 公园内的公路大多沿河
而开，可是有时候明明刚沿着一条由西向东流的河开，没多远，沿着公路的河就变成了
由东往西流，开始我怀疑自己看错了，河水怎么会倒行逆施呢? 这条continental
divide就是这个疑问的答案。原来由于北美大陆的continental divide南北纵贯黄石公
园，在黄石内流经的河有些向西注入太平洋，比如madison river, snake river, 有的
向东经密西西比河注入大西洋，比如yellowstone river。
开往teton的路大多是沿着snake river的。teton中最大的湖是jackson lake. 由于我
们今天有比较长的路要赶，在teton没有作过多停留。在jackson lake的一个观景点，
一群长着黄头黑身子的鸟飞到我们的车边，在我们旁边旁若无人的走来走去。旁边的公
园信息板上有这种鸟的信息，这 |
|
a***n
发帖数: 584 | 12 【 以下文字转载自 Outdoors 讨论区 】
发信人: ahfan (阿樊), 信区: Outdoors
标 题: 幽静的漫步: Weminuche Wilderness八天七夜
发信站: BBS 未名空间站 (Mon Aug 18 23:13:27 2014, 美东)
当天在Elk Park，从蒸汽小火车下来的时候，环顾四周，只有我，火车上的游客，和幽
静的山林。那感觉颇为奇特。
Day 1 - 2 入山，向上
Elk Creek Trail -> Continental Divide Trail
Distance： 10.4 miles
Elevation gain/loss： 4500/1600 feet
Elk Creek Trail 的入口就在铁轨旁边，一不小心就容易错过。
开始的几英里都是缓慢的上坡路。走起来，很舒服。
当快到一个小池塘的时候，我这不速之客，终于被盯上了。一头年轻的驼鹿竟然就沿着
小路低头向我跑过来。
直到后来在小池边休息时，我看着它在那儿开心的啃着青草，又看了看自己手上的肉干
，还是没搞明白到底谁是肉食性动物。
第二... 阅读全帖 |
|
j**n
发帖数: 13789 | 13 You have the sky itself, which is a complete circle. We measure it to have
“360º”. From there we divide it in different ways to get
astrologically meaningful sections.
You are most familiar with how the sky is divided into 12 sections – the “
12 signs of the zodiac”. This division is based on the movement of the Sun
over the course of a complete Moon cycle (how far the Sun moves in the sky
during the course of the Moon going from full to new and back again).
There are other divisions that a... 阅读全帖 |
|
b*s
发帖数: 82482 | 14 居然找到了：
这个Surowiecki老是写经济专栏的……
http://www.newyorker.com/arts/critics/books/2010/10/11/101011cr
Later
What does procrastination tell us about ourselves?
by James Surowiecki October 11, 2010
Procrastination interests philosophers because of its underlying
irrationality.
Some years ago, the economist George Akerlof found himself faced with a
simple task: mailing a box of clothes from India, where he was living, to
the United States. The clothes belonged to his friend and colleague Joseph
Stiglitz, w... 阅读全帖 |
|
z****i
发帖数: 19707 | 15 版主:假如你认为,这广告不合适,让我知道,我可以修改.
用过两次
价格:$40.00(包邮费)
站内联系
介绍如下:
Tamrac 3548 Express Pack 8 - for Digital SLR Outfit with 2 Lenses and
Accessorie
The Tamrac 3548 Express Pack 8 Backpack is a padded PolyTek two compartment
bag made to carry a digital SLR camera outfit with 2 lenses, flash and
accessories. The fully foam padded lower compartment with adjustable, foam-
padded dividers protects and provides a custom fit to a digital or film SLR.
The top compartment is made for personal items. A large fron... 阅读全帖 |
|
S******6
发帖数: 3138 | 16 上个月的文章，不是泛泛的某“科学杂志”，是 Science。你说的这个观点，在什么地
方，请给个出处。
Most cancers are caused by bad luck not genes or lifestyle, say scientists
Scientists at Johns Hopkins University School of Medicine in the US found
that the majority of cancers are not linked to environment or lifestyle
Sarah Knapton By Sarah Knapton, Science Editor7:00PM GMT 01 Jan 2015
Comments707 Comments
The majority of cancers are the result of bad luck rather than unhealthy
lifestyles or inherited genetic faults, scientists have discover... 阅读全帖 |
|
c****n
发帖数: 1646 | 17 真受不了你这样的文科生了，
这是欧几里德证明的英文版，你去和他较劲吧。
Euclid's Elements, Book IX
Proposition 20
Prime numbers are more than any assigned multitude of prime numbers.
Let A, B, and C be the assigned prime numbers.
I say that there are more prime numbers than A, B, and C.
Take the least number DE measured by A, B, and C. Add the unit DF to DE.
Then EF is either prime or not.
First, let it be prime. Then the prime numbers A, B, C, and EF have been
found which are more than A, B, and C.
Next, let EF not be prime. Ther... 阅读全帖 |
|
t*******r
发帖数: 22634 | 18 我刚才吃饱了撑的，特地去 google 了一下 Euclid's 的 proof 的 link，
看到两个不同的写法：
http://primes.utm.edu/notes/proofs/infinite/euclids.html
==============================================================
Theorem.
There are infinitely many primes.
Proof.
Suppose that p1=2 < p2 = 3 < ... < pr are all of the primes.
Let P = p1p2...pr+1 and let p be a prime dividing P; then p
can not be any of p1, p2, ..., pr, otherwise p would divide
the difference P-p1p2...pr=1, which is impossible. So this
prime p is still another prime... 阅读全帖 |
|
l**s
发帖数: 20567 | 19 本帖最后由 方舟子的师祖 于 2014-5-3 14:45 编辑
中华清誉得之不易岂容轻易陪葬
言论自由与生俱来神圣不可侵犯
揭露真相拨乱反正
这是两封版本分开的公开信：英文版和中文版。因为需要发送的对象不同，各自都有自
己的标题。为了方便，我才把他们贴在一个楼里。欢迎所有评论建议，不管是同意的还
是反对的，请回帖提出您的评论。除了个别文字外，公开信已经定稿（征求意见稿贴出
很多天了），内容不做修改，否则会没完没了，时间赔不起，请谅解！）
A note to the English version: This open letter is drafted and finalized by
me, one Chinese Canadian. Yet, it represents the very same voice of a great
many Chinese around the globe from the very bottom of their hearts. In
finalizing the open letter, I have indeed taken all com... 阅读全帖 |
|
d**********o
发帖数: 1321 | 20 第二次作业report
#+latex_class: cn-article
#+latex_header: \usepackage{CJKutf8}
#+latex_header: \begin{CJK}{UTF8}{gbsn}
#+latex_header: \lstset{language=c++,numbers=left,numberstyle=\tiny,
basicstyle=\ttfamily\small,tabsize=4,frame=none,escapeinside=``,
extendedchars=false,keywordstyle=\color{blue!70},commentstyle=\color{red!55!
green!55!blue!55!},rulesepcolor=\color{red!20!green!20!blue!20!}}
#+title: CS572 Project 2 Report
#+author: (me~~~)
#+begin_abstract
|---------------------------+------------... 阅读全帖 |
|
d**********o
发帖数: 1321 | 21 第二次作业report
#+latex_class: cn-article
#+latex_header: \usepackage{CJKutf8}
#+latex_header: \begin{CJK}{UTF8}{gbsn}
#+latex_header: \lstset{language=c++,numbers=left,numberstyle=\tiny,
basicstyle=\ttfamily\small,tabsize=4,frame=none,escapeinside=``,
extendedchars=false,keywordstyle=\color{blue!70},commentstyle=\color{red!55!
green!55!blue!55!},rulesepcolor=\color{red!20!green!20!blue!20!}}
#+title: CS572 Project 2 Report
#+author: (me~~~)
#+begin_abstract
|---------------------------+------------... 阅读全帖 |
|
p*e
发帖数: 6785 | 22 【 以下文字转载自 Military 讨论区 】
发信人: beijingren (to thine own self be true), 信区: Military
标 题: Re: 出名了，老毕上CNN了
发信站: BBS 未名空间站 (Thu Apr 9 12:53:43 2015, 美东)
(CNN)—A popular Chinese television host known for impromptu satire is now
the subject of controversy after being caught on camera cursing the late
Chairman Mao Zedong.
Bi Fujian, who works for state-run China Central Television, was filmed at a
dinner party singing a revolutionary song that eulogizes the Communist
Party's early years when he start... 阅读全帖 |
|
j****l
发帖数: 3356 | 23 【 以下文字转载自 USANews 讨论区 】
发信人: Blackholes (浪里白条), 信区: USANews
标 题: 浪里白条：史上最牛的一次恶搞
发信站: BBS 未名空间站 (Mon Mar 13 11:30:44 2017, 美东)
【 以下文字转载自 USChineseRight 俱乐部 】
发信人: Blackholes (浪里白条), 信区: USChineseRight
标 题: 浪里白条：史上最牛的一次恶搞
发信站: BBS 未名空间站 (Mon Mar 13 11:19:16 2017, 美东)
才30岁就过气了的明星傻鸭喇叭夫（Shia LaBeouf，你要是不喜欢傻鸭这个名字，把
他叫沙亚好了，忠实音译）为了挽救自己的职业生涯，想出了一个馊主意炒作自己，趁
着新总统床铺上任之机，利用左疯和左蛆们对床总的仇恨，推出了一个艾肥肥式的“艺
术”项目：搞一个24小时不间断直播的摄像头，“鼓励”疯子们在镜头前大喊“他不会
分裂我们（he will not divide us）。这个项目计划一直搞下去，搞到床总任期
结束（或者被弹劾下台）为止。
直播... 阅读全帖 |
|
|
b*********m
发帖数: 3745 | 25 两周前为了装tank divider偶然发现鱼缸顶部的塑料大梁断了，没有了大梁的拉力鱼缸
的长边在水的压力下开始向外鼓，本来直的玻璃向外弯成了一个大弧线，在网上一查说
随时有可能爆缸。55加仑的鱼缸爆缸那就几乎是个小规模发水啊！
危机当前，家里的危机处理委员会小组（只有小组长光杆司令一名）立刻开始工作。用
变形鱼缸的水和部分底砂建好了一个闲置的10加仑小鱼缸，幸好之前已经配好了加热器
，过滤器，空气石和气泵，并且事实验证了均工作正常，使得小鱼缸立刻就成功启动。
把小白和小清道夫转移到小鱼缸里后，立刻把变形鱼缸里的水全部泄掉，哇，松了一口
气。
之后的工作就不是那么着急了，危机处理委员会小组长摇身一变为危机后续清理重建委
员会小组长，按部就班的开始清理废旧大鱼缸的工作，包括卸除所有底砂（装满了两个
homedepot 5 gallon bucket），拆卸清洗过滤器，把鱼缸从底座上搬下来转移到车库
冲洗之后闲置。现在还没来得及买新缸，于是就把木头顶直接摞在木头底座上了，如图
1。
而我的工作，就是照顾新建的10加仑小鱼缸。除了确认水温刚好在78华氏左右，最重要
的工作就是监测水质，因为新... 阅读全帖 |
|
S*******t
发帖数: 3956 | 26 【 以下文字转载自 Faculty 讨论区 】
发信人: SlowRabit (慢吞吞的小白兔), 信区: Faculty
标 题: 翻译：高妹对尹希教授的专访
发信站: BBS 未名空间站 (Sat Sep 26 11:16:17 2015, 美东)
（作为年仅31岁就晋升哈佛正教授的青年才俊，尹希教授最近得到了很多关注。其中一
篇关于他的专访进入了一名同是美国大学华裔教授的女科学家的视线。因为觉得这样的
采访不过瘾，她突发奇想，想亲自采访一下尹希。于是就有了这个我们今天看到的两名
科学家之间的对话。这位女教授使用了化名，这是她出版自己几部科幻小说的笔名。对
，没错，这位女教授同时也是一个女文青，已经写了几本书，还都是英文，Amazon 就
能买到。感兴趣的不妨找来看看。很可能有一天，她也会成为传奇式的人物。那今天这
篇采访就会成为另一段佳话。）
Interview with Dr. Xi Yin
--- By Fiona Rawsontile, Sept 2015
Translated by Slow Rabbit
Thi... 阅读全帖 |
|
G*******s
发帖数: 4956 | 27 Blinded By Tradition:
An Open Letter to Dave Hunt
Regarding His Newly Published Attack Upon the Reformation, What Love Is This
? Calvinism's Misrepresentation of God
James White
Updated 5/16/02, see bottom of file
Dear Dave,
In the period of time since I finally received my own copy of your book (you
may recall I scanned through it while standing at your table in St. Louis a
t the PFO Conference) I have gone through a number of different emotions. A
t first I was just going to do one Dividing ... 阅读全帖 |
|
l**********t
发帖数: 5754 | 28 chapter 11.4 One Living Sacrifice
We have said that there is an aspect of the death of Christ presented to us
in Ephesians 5 which is to some extent different from that which we have
been studying in Romans. Yet in fact this aspect is the very end to which
our study of Romans has been moving, and it is into this that the letter is
leading us as we shall now see, for redemption leads us back into God’s
original line of purpose.
In chapter 8 Paul speaks to us of Christ as the firstborn Son among m... 阅读全帖 |
|
l**********t
发帖数: 5754 | 29 chapter 11.4 One Living Sacrifice
We have said that there is an aspect of the death of Christ presented to us
in Ephesians 5 which is to some extent different from that which we have
been studying in Romans. Yet in fact this aspect is the very end to which
our study of Romans has been moving, and it is into this that the letter is
leading us as we shall now see, for redemption leads us back into God’s
original line of purpose.
In chapter 8 Paul speaks to us of Christ as the firstborn Son among m... 阅读全帖 |
|
C****i
发帖数: 1776 | 30 来自主题: TrustInJesus版 - 问个问题 所以你认为撒但是有来源的是吧？
这点我认同。
那么撒但的来源是什么呢？我们回到圣经就知道了。
在和合本圣经中，撒但总共出现48次
代上 21:1 撒但起来攻击以色列人，激动大卫数点他们。 伯 1:6 有一天， 神的众子
来侍立在耶和华面前，撒但也来在其中。 伯 1:7 耶和华问撒但说：“你从哪里来？”
撒但回答说：“我从地上走来走去，往返而来。” 伯 1:8 耶和华问撒但说：“你曾用
心察看我的仆人约伯没有？地上再没有人象他完全正直，敬畏 神，远离恶事。” 伯
1:9 撒但回答耶和华说：“约伯敬畏 神，岂是无故呢？ 伯 1:12 耶和华对撒但说：“
凡他所有的，都在你手中；只是不可伸手加害于他。”于是撒但从耶和华面前退去。 伯
2:1 又有一天， 神的众子来侍立在耶和华面前，撒但也来在其中。 伯 2:2 耶和华问
撒但说：“你从哪里来？”撒但回答说：“我从地上走来走去，往返而来。” 伯 2:3
耶和华问撒但说：“你曾用心察看我的仆人约伯没有？地上再没有人象他完全正直，敬
畏 神，远离恶事。你虽激动我攻击他，无故地毁灭他；他仍然持守他的纯正。” 伯
2:4 撒但回答耶和华说：“人以皮代皮... 阅读全帖 |
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J*******g
发帖数: 8775 | 31 如果你看约伯记看出神魔一念，那就是你要看看别的书。最重要的是要看study bible
。不要闭门造车。没听说过哪个基督徒看出这个结论。这个结论太离谱。
你认为上帝把自己放到地狱火里烧了？
耶稣曾经反驳过这种说法了。
Matt 12
22 Then they brought him a demon-possessed man who was blind and mute, and
Jesus healed him, so that he could both talk and see. 23 All the people were
astonished and said, “Could this be the Son of David?”
24 But when the Pharisees heard this, they said, “It is only by Beelzebul,
the prince of demons, that this fellow drives out demons.”
25 Jesus knew their thoughts and said to t... 阅读全帖 |
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J*******g
发帖数: 8775 | 32 Dignity 说的不错。我在补充一下。我认为主要是要说清楚，这是一个预言，神说“I
will”，是神的统治力的表现。说他预言的事，是必然会发生的。是他冥冥中确保这些
事发生，但是这并非神想让人去杀戮和作恶，而是他预言这些是人们自身的罪和恶的果
实。
我把NET Bible的解说贴过来。
https://lumina.bible.org/bible/Zechariah+14
3. The reign of Messiah ch. 14
“The cosmic, eschatological sweep of this last portion . . . is almost
without compare in the prophetic literature of the OT for the richness of
its imagery, the authority of its pronouncements, and the majestic
exaltation of the God of Israel who will be worshiped as the God of ... 阅读全帖 |
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r******y
发帖数: 21907 | 33 打算学习这首歌，舌头有点儿绕不过来，tounge twister。。。。
http://www.youtube.com/watch?v=fmXLzY8kbYA
Come to decide that the things that I tried
Were in my life just to get high on
When I sit alone come get a little known
But I need more than myself this time
Step from the road to the sea to the sky
And I do believe that we rely on
When I lay it on
Come get to play it on
All my life to sacrifice
Hey oh listen what I say oh
I got your
Hey oh now listen what I say oh, oh
When will I know that I really cant go
To the w... 阅读全帖 |
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l*****m
发帖数: 122 | 34 谢谢你的建议:)
具体说说我的virus载体和transduction的过程吧~
1> retrovirus用的是MSCV based带有mir155 backbone的一个载体（某postdoc自己构
建的）有GFP marker。因为它只侵染dividing cell, 所以就在collect BM的当天做一
次spin infection （用fresh virus containing sup from transfected 293T cells)
，之后两天各做一次spin infection，然后让细胞在有GMCSF的medium里面继续分化到
day7 (中间换一次medium). 最后收细胞染色FACS. 现在结果就是no virus control分
化没什么问题，通常我得到90％ CD11c+细胞，其中MHCII+大概15％；问题是无论是
control virus (empty vector)还是有target shRNA的virus，细胞就不表达CD11c了 (
<10%），MHCII到没怎么变，还看过CD86之类的co-stimulatory molecul... 阅读全帖 |
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n********k
发帖数: 2818 | 35 no, it seems u need to do a better homework:))...the packing systems for
lenti and retro are the same except lenti need one extra...the difference is
lenti vector has the bosai element which determine the nuclear import...
that's why lenti can infect both dividing and non-dividing cells...frankly,
I haven't seen any retro which doesn't infect non-dividing at all... |
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T****i
发帖数: 15191 | 36 谈谈我个人的观点。
公理：Idea都是testable 的。否则叫幻想，宗教，或白日梦。
好idea 第一定律，如果成了，收益远远大于投入；第二定律，只有少数人能想到。第
三定律，需要test时间很长的idea，有divide and conquer的可能。
举例：第一点，如果某个idea要花几个月test，成了就是一片好文章或grant的基础，
那就是好idea。如果要花五年以上test，要成了能得炸药奖或Lasker 奖那才值。好
idea如果成了能开辟新领域或至少现有领域能更深入，而不是平行地挖类似的坑。第一
点，在试成之前，没经验的人很难判断好坏，所以就有了第二条。
第二点，如果一个idea 只有你想到了，实验室其他人都没想到，那就可能是好idea。
这个要求你有平均水平以上智商。智商太低的，基本上没有别人想不到而你想到的。
第三点，不一定总成立，有的好idea不能分割成更小的部分，但大多数在生物学领域的
好idea都是可以divide and conquer 并且能step-by-step logically test。也就是说
，尽管idea本身可能是跳跃性思维的结果，不是... 阅读全帖 |
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n********k
发帖数: 2818 | 37 I doubt you have done the readings...In short, yes and no...For some, the
lenti packging can be used for Retro(pbabe). So for dividing cells, doesn't
matter much for the infection/integration; However, for non-dividing cells,
presumably no big difference with infection but a huge difference with
integration step(nuclear entry step--which is essentially the key difference
between the two)...So essentially western doesn't tell you much here...
unless they stablize.
BTW, contrast to the common beli... 阅读全帖 |
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p*****c
发帖数: 20445 | 38 A-D E-K L-P R-Z
Peter Baumann, Ph.D.
HHMI Early Career Scientist
Stowers Institute for Medical Research
Peter Baumann’s research focuses on beginnings and endings: beginnings in
the form of reproduction in unisexual lizards and endings in the form of the
telomeres that protect chromosome tips.
Each time chromosomes are copied, telomeres—specialized stretches of DNA
that extend from the ends of each chromosome—become progressively shorter.
With each cell division, they ero... 阅读全帖 |
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z***e
发帖数: 5600 | 39
Black-scholes only applies to framework of European options.
Divident payment, if considered as a continuous cash flow
with a fixed percentage return of stock price,
can be easily included in B-S formula. In the case of constant
divident payment, a way to do it is to consider the stock
price S consists of 2 parts: D and S' where D is the
known cash flow of dividents, and S' is the "real" stochastic
price. By subtracting the present value of D from S, and
applying B-S formula or binomial trees |
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w*****s
发帖数: 433 | 40 问几个基础问题
1）要做一个实时的数据通路，input有24位，output只有16位。不考虑用先编码后解码
的方法。其中要过一个ram，想到过用32 input/16output的ram，并设置不同的in/out
clk频率。那么是不是说input的clock就应该是output的clock的一半，才能保证数据的
实时传输？用ise自动生成这样的ram后，读写controller应该就分开写吧？
2）采样一个信号，比如用简单的一个2级串联的FF来采样（没有试过，不知可行否），
要求采样频率可调。我用不同divider生成了不同频率的clk，再用mux来选择这些clk，
会出问题否？因为听人说过不宜用mux来选择时钟信号。另外，如果我只是用behavior
来写一个可调的divider，实际生成的电路是不是也是用mux来选不同divider生成的不
同的clk？
3）现在要求采样长度可调。如果用上述FF的方法来做，怎样做到长度可调？比如设置
采样100个clk，采样50个clk，采样200个clk。。。。
问题都很基础，期待解答～谢谢！ |
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p******e
发帖数: 1151 | 41 我来贡献下我的两分钱吧（我只懂点Lebesgue 测度和点点测度论）。
我觉得你将两个概念搞混了， 一个是无穷集合的势（cardinality）， 一个是集合的
测度(measure)。
one to one and onto map 和集合的势密切相关， 但是和集合的测度几乎没有关系。
一点典型的例子就是R包含不可测集， 显然这个集合是和R等势的。
问题是什么是测度呢， 基本上就是测量长度， 体积等等的推广。 所以测度差不多意
味着
it can be measured by human being in a reasonable way. In other words, one
can divide a set into smaller regular pieces and add them up. that leads to
（Lebesgue/abstract） integral etc. One can naturally go further and then
Borel sets/algebra becomes a natural extension.
But one n... 阅读全帖 |
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w***0
发帖数: 222 | 42 看了原帖。
这是这Poor Kid 得的： 他得是 手足口病。同时是 Strep 的携带者。 大约有 20%-30
% 的人是携带者。做 Rapid Strep 或Culture 会阳性。
这里有一个问题，一般三岁以下的孩子，得strep Throat 的比较少。通常是携带。
现在我们多Strep 阳性 实际上是 过度使用抗菌素。但也是情理中。
他的药物问题是这样的：如果使用Amoxil治疗Strep Throat ， 没有 QD 的 使
用建议。是 BID 或 TID 。使用剂量是 ２５－５０ ｍｇ／ｋｇ／２４ｈ． 分
两次 或三次。他是 ３６磅。合１４ 公斤。 大约日剂量是 ７００－８００ MG
。 这样他要两个ｔｓｐ （５ｍｌ／ｔｓｐ）每天。分两次的话，要一次一个Tsp.如
果是治疗中耳炎，剂量是 ８０－９０ MG/KG/24h
以下是UptoDate摘要：
DOSING: PEDIATRIC
(For additional information see "Amoxicillin: Pediatric drug information")
Usual dosage range:... 阅读全帖 |
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P*****s
发帖数: 375 | 43 A nice interview I just read is being shared with you guys here. :)
[ref]
http://fionarawsontile.blogspot.com/2015/09/interview-with-dr-x
Interview with Dr. Xi Yin
By Fiona Rawsontile, Sept 2015
This interview was inspired by an earlier interview of Dr. Yin I saw on the
Internet, which made me think that we can’t expect someone who normally
writes for entertainment to understand a physicist. To “provoke” a
scientist, we need another scientist. So I volun... 阅读全帖 |
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a******t
发帖数: 100 | 44 Another way to look at Problem 4.
1. A large prime number has to be an odd number.
2. One of the three consecutive odd numbers is not a prime (can be divided
by 3).
Consider the sequence of odd numbers:
3x, 3x + 2, 3x + 4, 3x + 6, ...
The pair of primes has to be 3x+2 and 3x+4 (as the previous and the
following odd numbers can be divided by 3).The one in the middle is 3x + 3,
which can be divided by 3 and is even. |
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