l****z
发帖数: 29846 | 1 Spending Per Pupil in Public Schools Climbed as Economy Crashed, Says Dept.
of Ed Study
By Terence P. Jeffrey
December 2, 2011
(CNSNews.com) - Inflation-adjusted median per pupil spending in U.S. public
schools increased from fiscal year 2008 to fiscal year 2009 even as the U.S.
economy was crashing, according to a recently released study by the U.S.
Department of Education’s National Center for Education Statistics.
When measured in constant 2009 dollars—and even without including
expenditures ... 阅读全帖 |
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X***y
发帖数: 3947 | 2 Exit Pupil和Eye Relief有关系吗？
是不是标称Exit Pupil同样的情况下Eye Relief长的镜子在同样实际眼到目镜的距离上
Exit Pupil就大？ |
|
a*****g
发帖数: 19398 | 3 SAN FRANCISCO (AP) — Soaring tax revenues have carried per-pupil education
spending in California beyond where it stood before the recession, but even
the record sum proposed by Gov. Jerry Brown is unlikely to reverse the state
's standing as a comparative miser when it comes to investing in public
schools, advocates and education officials said.
Brown, a Democrat known for preaching fiscal restraint, released a budget
plan last week that would boost state spending per student to $10,591 in the
... 阅读全帖 |
|
b*****e
发帖数: 5133 | 4 Eye relief是眼睛离开目镜多远仍能够看到全部景象，Eye relief之外看不到完整景象。
Exit pupil是实际通光孔径，影响景象明亮度。
就像单反照相机镜头exit pupil(光圈)大的取景器明亮，eye relief大的眼睛离开取景
器远些也能看到全景。 |
|
L******k
发帖数: 33825 | 5 【 以下文字转载自 Education 讨论区 】
发信人: LXJSmonk (紫色心情的 LXJS NYC_monk), 信区: Education
标 题: New York Asks Schools to Avoid Pupil Immigration Status
发信站: BBS 未名空间站 (Wed Sep 1 10:38:48 2010, 美东)
http://www.nytimes.com/2010/09/01/nyregion/01immig.html?
_r=1&ref=nyregion
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
＝＝＝
The State Education Department has sent school districts a memorandum
strongly recommending that they not ask for information that might
reveal the immigration status of enrolling students, after a |
|
e*********u
发帖数: 3591 | 6 今天跟一个律师聊了一下，才发现PUSD这样推iPAD Program是违法的，难怪他们对这个
问题一直遮遮掩掩的呢。这次坚决不做顺民了，学校让带iPAD坚决不干，合法合理啊。
违反的是加州教育法第49011条的(b1)，(b2)和(b3)。
CALIFORNIA EDUCATION CODE
49011. (a) A pupil enrolled in a public school shall not be
required to pay a pupil fee for participation in an educational
activity.
(b) All of the following requirements apply to the prohibition
identified in subdivision (a):
(1) All supplies, materials, and equipment needed to participate
in educational activities shall be provided to pupils... 阅读全帖 |
|
s****r
发帖数: 31686 | 7 By wiki, I believe it is very important.Also when it is much easier to see
on low mag than higher mag, at the two situations, only exit pupil are
drastically different
QUota from wiki:
To use an optical instrument, the entrance pupil of the viewer's eye must be
aligned with and be of similar size to the instrument's exit pupil. This
properly couples the optical system to the eye and avoids vignetting. (The
entrance pupil of the eye is the image of the anatomical pupil as seen
through the cornea... 阅读全帖 |
|
a*****g
发帖数: 19398 | 8 The nation’s per-pupil spending on K-12 public schools dropped in 2013 for
the third year in a row, reversing more than a decade of funding increases,
according to federal data released Wednesday.
Spending continued to vary widely across the country, from a low of $6,432
per student in Utah to a high of $20,530 per student in the District of
Columbia. The biggest spenders were largely clustered in the Northeast,
while the lowest were in the West and Southeast.
The national average was $10,763, d... 阅读全帖 |
|
m******1
发帖数: 19713 | 9 Add this to your gaydar: a new report in Live Science says that you can tell
a person's sexual orientation from their eyes. Pupils, that is. According
to Stephanie Pappas, a new study finds that pupil dilation is an accurate
indicator of sexual orientation. When people look at erotic images and
become aroused, their pupils open up in an unconscious reaction, which gave
researchers a much easier way to to study orientation and arousal without
traditionally invasive blood flow to the genital measu... 阅读全帖 |
|
l****z
发帖数: 29846 | 10 Max Hastings反思英国骚乱：多年的左派教条催生了不讲道德、不学无术、依赖福利、
凶狠野蛮的一代年轻人
Years of liberal dogma have spawned a generation of amoral, uneducated,
welfare dependent, brutalised youngsters
By Max Hastings
Last updated at 12:49 PM on 10th August 2011
A few weeks after the U.S. city of Detroit was ravaged by 1967 race riots in
which 43 people died, I was shown around the wrecked areas by a black
reporter named Joe Strickland.
He said: ‘Don’t you believe all that stuff people here are giving media
folk about how sorr... 阅读全帖 |
|
a***x
发帖数: 26368 | 11 amendment我还在读。改动在school code 18-8.10之后。但是看完general provision
你就知道丫们想干什么了。
1 Sec. 18-8.15. Basis for apportionment of primary State
2 financial aid to the common schools for the 2015-2016 and
3 subsequent school years.
4 (a) General provisions.
5 (1) The provisions of this Section apply to the 2015-2016
6 and subsequent school years. The system of primary State
7 financial aid provided for in this Section is designed to
8 ensure that, through a combination of State financ... 阅读全帖 |
|
a**r
发帖数: 5444 | 12 【 以下文字转载自 Donation 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设施。
2年前，西湖学校姚老师连同村里的几名其他老师一起筹资，亲手修建了现在的西湖小
学。学校从开始的3个班22个学生，扩展到现在的7个班184个学生。学生来自周边的各
个村寨，最远的距离学校有8公里的山路。
学校教室不够... 阅读全帖 |
|
a**r
发帖数: 5444 | 13 【 以下文字转载自 Donation 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设施。
2年前，西湖学校姚老师连同村里的几名其他老师一起筹资，亲手修建了现在的西湖小
学。学校从开始的3个班22个学生，扩展到现在的7个班184个学生。学生来自周边的各
个村寨，最远的距离学校有8公里的山路。
学校教室不够... 阅读全帖 |
|
y****i
发帖数: 2108 | 14 你以为这是哪一年？2012年2月8号（昨天）刘教授里远的博客。
留心一下后面的留言，大部分都是鼓掌欢呼的。
真的是生物的多样性啊。
http://creato.blog.sohu.com/203011890.html
-------------------------------
最新：朱巨龙先生发表重要评论（详见评论帖），痛批流氓匪首傅德志妖言邪论，颂赞
科学真相，振聋发聩，入木三分！（2012－2－08）
＝＝＝科学的胜利，才是真正的胜利！＝＝＝
－－－－是的，我们胜利了!两篇国际水平的英文论文，科学揭示了周照虎为活体虎和
立体虎的真相，无情剥开了年画虎为抄袭周照虎的人工合成怪物虎的丑陋面目。向全世
界宣布，大巴山华南虎没有灭绝，周正龙没有造假！科学的胜利，才是真正的胜利！（
2012－2－08）
本人第二篇虎照研究及野外考察论文已经在国际英文杂志－－《生物多样性杂志》
2011年第4期发表（Biodiversity Journal. Decemember, 2011 2(4):161-220）。一
方面，再次提供强有力的证据证明周照虎是... 阅读全帖 |
|
a**r
发帖数: 5444 | 15 【 以下文字转载自 Donation 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设施。
2年前，西湖学校姚老师连同村里的几名其他老师一起筹资，亲手修建了现在的西湖小
学。学校从开始的3个班22个学生，扩展到现在的7个班184个学生。学生来自周边的各
个村寨，最远的距离学校有8公里的山路。
学校教室不够... 阅读全帖 |
|
f******e
发帖数: 6488 | 16 【 以下文字转载自 Stock 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Stock
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新 (转载)
发信站: BBS 未名空间站 (Sun Jan 30 13:43:32 2011, 美东)
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设... 阅读全帖 |
|
f******e
发帖数: 6488 | 17 【 以下文字转载自 Stock 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Stock
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新 (转载)
发信站: BBS 未名空间站 (Sun Jan 30 13:43:32 2011, 美东)
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设... 阅读全帖 |
|
f******e
发帖数: 6488 | 18 【 以下文字转载自 Stock 讨论区 】
发信人: mitOCEF (帮帮孩子), 信区: Stock
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新 (转载)
发信站: BBS 未名空间站 (Sun Jan 30 13:43:32 2011, 美东)
发信人: mitOCEF (帮帮孩子), 信区: Donation
标 题: 新春佳节，请继续关注山区教育，OCEF 项目更新
发信站: BBS 未名空间站 (Sun Jan 30 13:25:34 2011, 美东)
http://www.causes.com/causes/375784-ocef-overseas-china-educati
Raise $5771 to purchase books, desks and lighting for West Lake Elementary
School
西湖小学，是一所已有30多年历史的民办小学，座落于织金县城关镇西湖村，是县城关
镇一个办学点，离县城中心近3公里，多年来一直没有教室，都是租用村民的房屋作为
教室给孩子们上课，也没有任何的学生活动场所及其他教育附属设... 阅读全帖 |
|
|
x*7
发帖数: 11281 | 20 just FYI
Exit Pupil:
An exit pupil is the small circle (column) of light that is visible in
the ocular lens when you hold your scope (or binocular) at arm's length. The
larger the exit pupil is, the brighter the image that will be entering your
eye. To find the exit pupil for your scope, divide the objective lens
diameter in millimeters by the magnification. For example, if your scope is
four power (4X), and your objective lens is thirty-six millimeters in
diameter (36mm), divide 4 into 36 a... 阅读全帖 |
|
i*****a
发帖数: 7272 | 21 哎哟同学给的link:
The responsibility for the German education system lies primarily with the
states (Länder) while the federal government plays only a minor role.
Optional Kindergarten (nursery school) education is provided for all
children between two and six years of age, after which school attendance is
compulsory.[1] The system varies throughout Germany because each state (Land
) decides its own educational policies. Most children, however, first attend
Grundschule from the age of six to ten.... 阅读全帖 |
|
w****d
发帖数: 9 | 22 意义：
1. 薄先生的公开发言称薄瓜瓜的留英费用由哈罗公学全额奖学金负担。
2. 薄先生身为国家最高级公务员之一，因而该发言的真实性绝不仅仅是其家庭私事。
哈罗公学
School fees
The school fee for academic year 2011/2012 is £10,310 per term (£
30,930 per annum) and includes board, tuition, textbooks, a stationery
allowance and laundry. For any subject requiring additional tuition there is
an extra charge.
Link: http://www.harrowschool.org.uk/1571/admissions/fees-and-charges/
事实：
Harrow offers means-tested bursaries (fee reductions) of up to 100% to
pupils who w... 阅读全帖 |
|
W******e
发帖数: 3319 | 23 1. Introduction
My interest in studying creativity was inspired by the frustrations that I
felt as a student, then as a professor. I wanted to know how I could
encourage creativity in myself, my students, and my colleagues.
Politicians, industrial managers, academic administrators, and other leaders
often say that innovation is critical to the future of civilization, our
country, their company, etc. But in practice, these same people often act as
if innovation is an evil that must be suppressed,... 阅读全帖 |
|
a***a
发帖数: 8941 | 24 That is kind of misleading.
The brightness is not related to exit pupil. And exit pupil cannot be too
large. If exit pupil is too large, more lights will be waited because human
eyes' pupil is not large enough to take the light
And in your quoted site, please look at this:
Twilight Factor:
Twilight factor is the measurement of the efficiency of a rifle scope in
low light conditions. The higher the twilight factor, the more useable the
scope is in twilight conditions. The formula for determin... 阅读全帖 |
|
a****a
发帖数: 26187 | 25 ☆─────────────────────────────────────☆
lct (红砖头) 于 (Mon Oct 17 22:37:32 2011, 美东) 提到:
朵朵花都像翩翩起舞的花仙子...
☆─────────────────────────────────────☆
grapetomato (delicious) 于 (Mon Oct 17 22:39:31 2011, 美东) 提到:
就在窗户边上阿？不怕蒙汗了？
☆─────────────────────────────────────☆
lct (红砖头) 于 (Mon Oct 17 22:42:15 2011, 美东) 提到:
在室外，蒙汗贼用
☆─────────────────────────────────────☆
almeda (土木工程) 于 (Mon Oct 17 22:56:43 2011, 美东) 提到:
米粒啊米粒
☆─────────────────────────────────────☆
rorona (Thinking) 于 (M... 阅读全帖 |
|
B****n
发帖数: 11290 | 26 BBC有做了個記錄片 以下是第一集
他們也寫了一些報導 原文在以下連結
http://www.bbc.com/news/magazine-33735517
BBC的報導比以下中文的報導更平衡些 比方說節錄以下BBC報導的片段
As the weeks passed, thanks both to the support of Bohunt's pastoral staff
and a slight shift towards a teaching approach more recognisable to our
pupils, behaviour improved.
Perhaps as a result of the amount of time spent together, teacher-pupil
relationships got better and some pupils began to express a preference for
the Chinese style.
They liked having to copy "stuff" from the boa... 阅读全帖 |
|
o******e
发帖数: 1761 | 27 华人是白人还是黑人？美国最高法院回答你
-- 宪法固重要 解释更关键 若得好借口 二者皆可抛
原作者： 方鲲鹏， Oskarlre, 给予部分编辑整理。
历史上华人在法律上真的和白人在种族隔离时期享受一样待遇么？
让我们看看历史就知道：
那就是1927 的鲁恭诉赖斯案（Gong Lum v. Rice）
最高法院通过普莱西案宣布种族隔离没有违反宪法31年之后，在宣判另一件案子时再次
重申种族隔离合法，这就是1927 的鲁恭诉赖斯案（Gong Lum v. Rice）。美国的民权
史文献对这个案子着墨不多，不过华人却应该对此案感兴趣，因为起诉一方是华裔，而
美国最高法院需要解答的问题也和华人密切相关：
种族隔离状态下，中国人是白人还是黑人？
玛莎•鲁(Martha Lum)是出生于美国的中国血统美国公民，住在密西西比州的玻
利瓦尔县。1924年玛莎申请就读住宅所在学区的一所公立学校，校名为卢瑟戴尔合并高
中（Rosedale Consolidated High School）。这种称为合并高中的学校，想来是高中
、初中和小学合并在一起的学校，因为玛莎那年只有9岁，不可能就读高... 阅读全帖 |
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T**********e
发帖数: 29576 | 28 像DC，政府每个学生年花费25000刀，教出来的中学生只有不到五分之一的会读书算数
。每个教师收入福利9w，行政人员编制膨胀。
The average American public school spends $11,455 per pupil, and that’s is
just the average: Washington, D.C., the home of legendarily horrible
government schools—among eighth-graders, only 17 percent are proficient in
reading and 19 percent proficient in math—spends upward of $18,000 per
student. That’s from the U.S. Census Bureau, by the way; after examining
the numbers, the Cato Institute estimated that D.C. might spend closer to... 阅读全帖 |
|
p****3
发帖数: 448 | 29 RADCLIFFE SADDLER began working at IBM, where he analyses market trends, on
July 13th. He applies his programming and technical skills to a digital
platform that provides market research to his colleagues. It is a good job:
he makes $50,000 a year, has a health-care package and a pension plan. Mr
Saddler is 18 years old. He earned his high-school diploma last month. A few
weeks before finishing school, he also received an associate degree in
computer systems technology.
Mr Saddler was a pupil at... 阅读全帖 |
|
s******o
发帖数: 1194 | 30 Study suggests most straight women are aroused by other women
Taryn Hillin
11/18/15 7:00amFiled to: SEX & LIFE
27.6K
Shutterstock, FUSION
Whenever my boyfriend asks me what kind of porn I want to watch, I usually
say, "Two girls, one guy." Why? Because women turn me on. To be clear, I am
straight—but I've always found that watching two women in sexual situations
is pretty hot.
Turns out, I am not alone. A new study from the University of Essex that's
making waves has found that straight women ar... 阅读全帖 |
|
s******o
发帖数: 1194 | 31 Study suggests most straight women are aroused by other women
Taryn Hillin
11/18/15 7:00amFiled to: SEX & LIFE
27.6K
Shutterstock, FUSION
Whenever my boyfriend asks me what kind of porn I want to watch, I usually
say, "Two girls, one guy." Why? Because women turn me on. To be clear, I am
straight—but I've always found that watching two women in sexual situations
is pretty hot.
Turns out, I am not alone. A new study from the University of Essex that's
making waves has found that straight women ar... 阅读全帖 |
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p*******m
发帖数: 20761 | 32 美国人这么多无知的人 需要教育 这个比长大了祸害要省钱多了
对世界的各种认识都会好一些
Question:
What are the new Back to School statistics for 2015?
Response:
Elementary and Secondary Education
Enrollment
In fall 2015, about 50.1 million students will attend public elementary and
secondary schools. Of these, 35.2 million will be in prekindergarten through
grade 8 and 14.9 million will be in grades 9 through 12. An additional 4.9
million students are expected to attend private schools (source). The fall
2015 public school enrollment is e... 阅读全帖 |
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B*********e
发帖数: 86 | 33 ([email protected]/* */)
http://www.mitbbs.com/article_t/Faculty/31892683.html
([email protected]/* */ ~ [email protected]/* */)
山不在高 。。。。 。。。。 。。。。 。。。。。。。。
([email protected]/* */)
yihe86 (王小骆) 同学/老师，你说的‘。。。三天的行程，一天半的面试，小学校真
是实诚啊，领导几乎全上了。。。’这样的这么一个安排，想了一下(oh yeah, 想了一
下~~，如果i can… … ..)。。。，觉得(eh，觉得？？~~… if … … ..)。。。，好
像如果从书本上面的。。。。。。来说。。。。。。，譬如说《三国演义》的话，可能
有两。。。能（相对来说（？？）可能算是比较极端的情况什么的？？~~。。。@@_@@.
.. … ..）。。。？？~~。。。@@_@@... … ..：
例1）《三国演义》里面的。。。诸葛亮 （老师/同学... 阅读全帖 |
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G***G
发帖数: 16778 | 34 no. it is not rattle snake.
see the pupil. Round pupil means it is non-venomous.
Venomous snakes have ecliptical pupil.
This is the most accurate way to test if a snake is venomous or not.
But it is not effective because you cannot have chance to get so close to
the snake and check it.
Some other ways include head shape, tail shape, and body stripe.
But those methods are not that accurate and they require lots of experience. |
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i*******y
发帖数: 109 | 35 如果我理解没有问题的话，你可以参考下下面
Interdistrict Transfer Because of Parent Employment/Allen Bill
California Education Code Section 48204(b) (Outside Source) permits a school
district to deem a pupil to have complied with the residency requirements
for school attendance in the district if at least one parent/guardian of the
pupil is physically employed within the boundaries of that district. Once
admitted to residency, the pupil’s transfer may be revoked only if the
parent ceases to be employed within the bou... 阅读全帖 |
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u*****a
发帖数: 6276 | 36 Laura Spence became a high-profile story when she was turned down by Oxford
With schools in London outperforming the rest of the country, does this mean
that region should be taken into account? The most recent figures show
there were about 60 pupils accepted from the north-east of England compared
with more than 660 from London.
Should deprivation be judged by where pupils live or where they go to school
, which could be in another higher-achieving local authority? Or should it
be the type of i... 阅读全帖 |
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t******l
发帖数: 10908 | 37 Ministers insist the Government's new compulsory assessment can help schools
spot slow readers. Teachers argue the brightest pupils fail it. Here,
Jennifer Jackson gives a parent's perspective.
Word games: experts say phonics tests can create problems for children and
hold them back Alamy
http://www.independent.co.uk/news/education/schools/why-phonics-tests-spell-trouble-8364917.html
Parents are up in arms about the state of reading and writing in primary
schools. Not only, they claim, are teach... 阅读全帖 |
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g****t
发帖数: 31659 | 38 大家看看，下面这2段，像不像老马的文风：
The Blind Pupil.—As long as one knows very well the strength and the
weakness of one's dogma, one's art, one's religion, its strength is still
low. The pupil and apostle who has no eye for the weaknesses of a dogma, a
religion and so on, dazzled by the aspect of the master and by his own
reverence for him, has, on that very[155] account, generally more power than
the master. Without blind pupils the influence of a man and his work has
never become great. To give victory to k... 阅读全帖 |
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j******3
发帖数: 18319 | 39 http://www.dailymail.co.uk/news/article-2150534/Facebook-bride-
How ￡12 billion Facebook bride embodies the American dream: Father of
Zuckerberg's new wife was Asian refugee who worked 18-hour days in Chinese
takeawayPriscilla Chan was mainly raised by her grandmother because parents
Dennis and Yvonne worked such grueling hours at their Boston restaurant
Her science teachers says she was determined and bright pupil who was aiming
for Harvard when she was just 13
When Priscilla Chan married her l... 阅读全帖 |
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f*******t
发帖数: 157 | 40 Exit pupil和twilight factor都可以用来衡量暗光下的光学质量，Exit pupil说的是
图像亮度；twilight factor说的是暗光下分辨细节的能力，所以用放大倍率×物镜口
径。
通常在暗光下，用Exit pupil大的低倍镜子，可以很快看清图像，但是看细节的能力受
倍数限制。看细节还是要用高倍，所以弄了个twilight factor出来，但是高倍镜子图
像暗，眼睛要适应一下才能看清 |
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B*********e
发帖数: 86 | 41 ([email protected])
回帖_BiggeyIssue_to wonderingmm jiuselu Asdfeqo et al_mitbbs_2018-03-08 ~ 03
[email protected]_1633-.docx
([email protected])
回帖_BiggeyIssue_to wonderingmm jiuselu Asdfeqo et al_mitbbs_2018-03-08 ~ 03
[email protected]_2224-.docx
([email protected])
回帖_BiggeyIssue_to wonderingmm jiuselu Asdfeqo et al_mitbbs_2018-03-08 ~ 03
[email protected][email protected]_2330-_.docx
([email protected])
回帖_BiggeyIssue_to wonderingmm jiuselu Asdfeqo et a... 阅读全帖 |
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s**********s
发帖数: 7387 | 42 这个应该是exit pupil前置，跟nikon设计24-70、14-24采取的手段类似。当然本来反
望远广角的设计就是为了exit pupil前移，只不过24-70、14-24为了适应数码sensor的
边角，把本来已经前移的exit pupil继续往前推了一段距离。类似的还有ZF的distagon
系列。
缺点就是这样会把镜头搞得很大 |
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w**7
发帖数: 5258 | 43 Wiki 是个好东西
“where f is the focal length, and D is the diameter of the entrance pupil (
effective aperture). It is customary to write f-numbers preceded by f/,[2]
which forms a mathematical expression of the entrance pupil diameter in
terms of f and N. For example, if a lens's focal length is 10 mm and its
entrance pupil diameter is 5 mm, the f-number is 2 and the aperture size
would be expressed as f/2”. |
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z****o
发帖数: 368 | 44 A 48-year-old man comes to his physician because his wife noticed that his
right pupil is "small." Physical examination shows that the right pupil is
constricted and does not react to light. His left pupil is normal. These
findings are most likely due to a lesion involving which of the following
structures on the right?
A) Cervical spinal cord
B) Frontal eye fields
C) Lateral geniculate nucleus
D) Optic tract
E) Visual cortex
你的选择？麻烦再简单说一下原因。多谢 |
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A*******s
发帖数: 9638 | 45 今天被一个医生朋友的电话揪到了医院， 他给他一个亲戚做了个手术， 今天是第2天。
67 yrs old female had a cervical laminectomy for her cervical myelopathy
yesterday. Her initial symptoms include gait disturbance. After the surgery
, she was found to have a right arm weakness and right pupil dilatation. She
had been in respiratory failure after the surgery and currently she was on
biPAP.
ICU nurse was apparently panic after she saw the dilated right pupil which
was new and confirmed by her family members.
PMH: HTN， Glucoma.
Social/fami... 阅读全帖 |
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A*******s
发帖数: 9638 | 46 You got the right answer.
The family brought in her eyedrops for glucoma and the nurse only put the
drops in her left eye. That's why her left pupil is constricted and right
pupil appeared to be bigger than normal that family usually sees.
Her right arm weakness is from surgery and myelopathy.
The lesson we learn from the case is: for the anisocoria, the very first
step is to make sure this is not a pharmacological pupil. Since this patient
has a history of glaucoma, what I did was to pick up th... 阅读全帖 |
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b*****e
发帖数: 5476 | 47 规范ethnic studies program，以下内容被禁
* Promote the overthrow of the United States government.
* Promote resentment toward a race or class of people.
* Are designed primarily for pupils of a particular ethnic group.
* Advocate ethnic solidarity instead of the treatment of pupils as
individuals.
据说立法目的是为了社会和谐，不能让劳模小孩天天学Arizona以前是劳模的地盘，老
黑小孩学以前当奴隶的悲惨历史这样的东西。 |
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i*****s
发帖数: 4596 | 48 wiki里有比较客观的阐述：
Leonardo's most intimate relationships were perhaps with his pupils Salai
and Melzi. Melzi, writing to inform Leonardo's brothers of his death,
described Leonardo's feelings for his pupils as both loving and passionate.
It has been claimed since the 16th century that these relationships were of
a sexual or erotic nature. Court records of 1476, when he was aged twenty-
four, show that Leonardo and three other young men were charged with sodomy
in an incident involving a well-known ... 阅读全帖 |
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z*m
发帖数: 3227 | 49 http://www.thelocal.se/48158/20130527/
Husby是这次骚乱的中心，看看瑞典政府投了多少钱给他们,可悲啊
A common argument is that the riots are due to cutbacks in welfare services.
This is a misconception. The neighbourhoods that experience unrest have
received massive public spending in recent years, in the hope of reducing
social problems. Take Husby, the epicentre for the latest wave of violence,
as an example. In early 2012, 280 iPads were handed out to pupils at the
Husbygård school. This is a luxury many other stude... 阅读全帖 |
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