m******8
发帖数: 2153 | 1 A new study by university researchers supports the stereotype that gay men
are thinner than straight people and lesbians are heavier.The report,
published in the American Journal of Public Health, looked at a survey of
more than 67,000 Massachusetts residents between the ages of 18 and 64.
According to msnbc.com, researchers found that while 21 per cent of straight
men were classed as obese, only 14 per cent of gay men were.Conversely,
they found that 26 per cent of lesbians were obese, compared |
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m*********r
发帖数: 607 | 2 Thank you all for the insights. Then, will use a different material (lighter
but stronger aluminum) make the car less/more safe if heavier cars are
generally safer? |
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k*******2
发帖数: 1429 | 3 古代的方轮
"Heavier-than-air flying machines are impossible." - Lord Kelvin,
president, Royal Society, 1895. |
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f*l
发帖数: 742 | 4 Americans love big cars.?How much are they?costing the country?
Like Americans themselves, American cars are getting heavier and heavier
every year. Our new cars are?more efficient, with average fuel economy
climbing and carbon-dioxide emissions falling over the course of the past 30
years. But that is not because they are lighter. The average new car
weighed 3,221 pounds in 1987 but 4,009 pounds in 2010. Even small-size
sedans have packed on the pounds, thanks to more-powerful—if more-effici... 阅读全帖 |
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i*******n
发帖数: 114 | 5 nvidia interview experience
location:
NVIDIA
San Thomas Expressway, Santa Clara
duration
2 hours, 1PM to 3PM
2 interviewers, each for 1 hour
------------------------------------------
cdj
xor eax, edx
sub eax, edx
问我这段代码干嘛。就是算负数的补码(Two's Complement)，正数没变化
logic puzzle,
4 fuses, each fuse burns out in 40 minutes, create a fuse that can burn
in
20 minutes. slightly flawed problem. Because when you burn the fuse from
two
ends, it is not exactly 20 minutes. (Two combustion points are
certainly
faste... 阅读全帖 |
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j***n
发帖数: 3786 | 6 Long Action Cartridges
6mm-06
This is an excellent longrange cartridge, but it derives it's performance
from a couple very specific longrange bullets.
It's good to 1000yds, but the wind will be pushing the lighter bullets
around much past that.
The realistic maximum range is 1500yds with 115gr Dtacs.
There are no factory made rifles so this is a custom build proposition.
There are no factory match quality loads available so you have to reload
your own ammo.
Cost to reload is moderate, brass is f... 阅读全帖 |
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d******u
发帖数: 1142 | 7 这篇文章里关于stretch 和 warmup 一些说法和我们平时了解的不大一样，贴出来供大
家讨论。
The 3 Most Effective Ways to Waste Time in the Gym
You are likely wasting time on all three.
by Mark Rippetoe
Time is money.
Money is scarce these days, everywhere but D.C. You want to be stronger, so
you go to the gym. The best use of your time there is the simple progressive
barbell training program we have discussed before, one that drives an
upward strength adaptation with a programmed increase in load over a full
range of motion using as m... 阅读全帖 |
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j***n
发帖数: 3786 | 8 Short Action Cartridges
223 Remington
This is an excellent shortrange to a good midrange cartridge.
It's good out to about 600yds, but the wind pushes it around much past that.
The realistic maximum range is 1000yds and there are very few bullets that
will even make it that far.
There are many options in factory made rifles, though most will not have the
proper twists and chambers to make use of the best longrange bullets.
There are many factory match quality loads available.
Cost to reload is l... 阅读全帖 |
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l*********u
发帖数: 19053 | 9 re
大而重就是安全，最基本物理定律。只有日托才硬拗。
1 How do a vehicle’s size and weight affect safety?
All other things being equal, occupants in a bigger, heavier vehicle are
better protected than those in a smaller, lighter vehicle. Both size and
weight affect the forces people inside a vehicle experience during a crash.
The magnitude of those forces is directly related to the risk of injury.
In the case of size, the longer distance from the front of the vehicle
to the occupant compartment gives a bigger veh... 阅读全帖 |
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b**k
发帖数: 3472 | 10 China Builds Mammoth Detector to Probe Mysteries of Neutrino Mass
Jane Qiu*
View larger version:
In this pageIn a new window
Download PowerPoint Slide for Teaching
Heavy hitter. China hopes its planned JUNO detector, 38 meters across, will
be the first to nail which of the three neutrino flavors is heavier or
lighter.
CREDITS: (INSET) IHEP; (SOURCE) M. BLENNOW ET AL. ARXIV 1311.1822 (2013)
BEIJING—It isn't easy to weigh a ghost. After neutrinos were hypothesized
in 1930, it took physicists 67 ye... 阅读全帖 |
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发帖数: 1 | 11 Guo Wengui's ten Deadly sins
If Guo Wengui who longing for "great" US is judged by US court, it might be
punished heavier．Fugitive Chinese billionaire Guo Wengui has been charged
with at least ten crimes according to media reports.
Guo Wengui who fled to the United States has been advertised to advocate the
rule of law. But as his a pile of criminal behavior exposure, the behavior
of Guo Wengui defied and trampling the rule of law is gradually exposed to
the world.
In China, his criminal associa... 阅读全帖 |
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f****t
发帖数: 15913 | 12 When a car hit a wall, the car is actually hit the earth. So a heavier car
will have more severe than a lighter car. If a train hit a mountain, the
damage will be much worse than a big truck. Can you get the conclusion that
a car is safer than a train?
In real world, cars do not hit the earth. Cars hit cars. Heavier cars
will have less impact than a lighter car. Heavier cars have more room to
deform before the passengers are hurt.
If you plan to hit a wall, a lighter car will be better th... 阅读全帖 |
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m*******a
发帖数: 363 | 13 Turned around. There were four muscular guys cleaning up campsites and
packing. we introduced each other. Tag, the one in white T-shirt. Brian, one
in red T-shirt and black hair. Came over Chris, short and looked very
strong and he pointed to a guy sitting by the camping table packing,, said”
thats Matthew” in blue. While Brian and Tag were packing by their truck,
Sophie and I rested our backpacks on the bench waiting for Chris and Matthew
to pack up. Matthew’s tent was still there, so we asked ... 阅读全帖 |
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a****n
发帖数: 4734 | 14 http://www.tennis-warehouse.com/LC/BasicFacts.html
Basic Facts About Frames & Strings
Reprinted with permission of the United States Racquet Stringer's
Association
EDITOR'S NOTE: The following information was supplied by USRSA Technical
Advisor Steve Davis. When Steve's not technically advising the USRSA, he's
directing Research & Development for Prince Sports Group. We think it's safe
to say that Steve knows his basic racquet and string facts.
Note that these facts are presented as generalities... 阅读全帖 |
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f**d
发帖数: 768 | 15 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
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b*****t
发帖数: 9671 | 16 我觉得你太能搞笑了
拿个图就来胡乱分析一通，你知道这个图里车子碰撞速度么？
不知道速度就在这儿大放厥词
而且把人家iihs的研究结果全盘推翻
iihs的research结果可是越重越安全的
http://www.iihs.org/externaldata/srdata/docs/sr4404.pdf
WEIGHT
When two cars going the same speed crash
front to front, the outcome depends in part
on the cars’ relative weights. The heavier car
will push the lighter car backward during the
impact, which means the velocity change of
the heavier car will be much less than that
of the lighter car. If the lighter car weighs
half as much as the heavier car |
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d***e
发帖数: 3497 | 17 碰撞都是IIHS测试Good的车，一大一小，小的惨不忍睹
https://www.youtube.com/watch?v=ExQUGk12S8U
Safety consequences of vehicle size and weight
All other things being equal, occupants in a bigger, heavier vehicle are
better protected than those in a smaller, lighter vehicle. Both size and
weight affect the forces people inside a vehicle experience during a crash.
The magnitude of those forces is directly related to the risk of injury.
In the case of size, the longer distance from the front of the vehicle to
the occupan... 阅读全帖 |
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c****n
发帖数: 97 | 18 I have Amex Plat, Sapphire Preferred and Ritz Carlton Visa.
They just sent the Ritz card embedded with chip. it's much more heavier than
the old one. 2x heavier than Chase Sapphire & 10x heavier than a regular
plastic like Platinum.. |
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d*****n
发帖数: 908 | 19 HANDGUN AMMUNITION:
SELF DEFENSE
Ammunition manufactured in the United States is among the finest in the
world. For intended defensive uses, the gun owner will not go wrong in
selecting ammunition produced by the most widely recognized manufacturers.
These include CCI/Speer, Cor-Bon, Federal, Remington, and Winchester.
Allow no margin for error in protecting one's life. Avoid potentially
unreliable ammunition that is hand loaded, re-loaded, or of dubious quality
foreign manufacture when ch... 阅读全帖 |
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F*****t
发帖数: 1138 | 20 两个枪设计一样，但是用料两样。下面是从AR15找来的 俺觉得买express其他的还好，
ejector/extractor 要换一个machined。俺买了国产的870，都是machined part，个人
觉得比较耐操。
From the Vang Comp web site:
What is the difference between a Remington Express and a Police Magnum?"
The Remington Police Magnum shotgun is built heavier to withstand the
abuse and pounding that police departments inflict on their gear. It has a
metal trigger assembly versus the Express's plastic assembly. The Police
Magnum also has heavier springs (7 lb. sear disconnect spring versu... 阅读全帖 |
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y****i
发帖数: 1050 | 21 The T-34 came to symbolise the effectiveness of the Soviet counterattack
against the Germans. One of the first known encounters with a T-34 involved
the 17th Panzer Division near the Dniepr River. The T-34 crushed a 37 mm
anti-tank gun, destroyed two Panzer IIs, and left nine miles of destruction
in its wake before being destroyed at close range by a howitzer. The
appearance of the T-34 in the summer of 1941 was a psychological shock to
German soldiers, who had been prepared to face an inferior ... 阅读全帖 |
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c**i
发帖数: 6973 | 22 BBC Chinese, Jan 11, 2011 (格林尼治标准时间12:47).
http://www.bbc.co.uk/zhongwen/
simp/china/2011/01/110111_j20_pingkefu.shtml
My comment:
(a) The report quotes 平可夫 as saying, "目前试飞的J20战机只是中国标准的第四
代战机，并不是国际标准的第四代战机和俄罗斯代号的第五代战机."
China seems to have a different term. But in US, it is called
Fifth generation jet fighter
http://en.wikipedia.org/wiki/Fifth_generation_jet_fighter
(b) He then says, "最重要的是，第四代战机发动机的推力至少要达到1.7吨."
Bill Sweetman stated in Aviation Week on Jan 3 2011 (cover date) that J-20
were bi... 阅读全帖 |
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b*****d
发帖数: 7166 | 23 the outcome depends on the individual size/weight, experience etc. since
tiger and lion are close, it may go either way. but tigers (dongbei or
bengal) are on average 20% heavier than lions, they win in most cases. think
of two boxers, one is 20% heavier than the other. |
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S***1
发帖数: 3140 | 24 一次航程1.5万公里，时速60公里，可以从印度洋开到大西洋再回到太平洋。排水量
7200吨，载有16枚射程达295公里的“布拉莫"超音速巡航导弹。
Indian warship building is coming of age and the Indo-Pacific region knows
it. Last week, when an Indian Navy frigate, INS Shivalik, visited China’s
Qingdao naval base, China’s navy chief, Admiral Wu Shengli, asked the
captain for a tour of the Combat Information Centre, the operation heart of
the warship. The Shivalik’s young skipper, Captain Puruvir Das, turned down
Wu’s request.
The Chinese admiral would be even more in... 阅读全帖 |
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x****u
发帖数: 12955 | 25
2F is for manned spaceship launch. It contained much more redundant safety
equipments and heavier fairing to protect the spaceship.
I don't know why Indians are proud of a rocket that's both 20-30% heavier
than LM3B AND has 20% less payload capacity. Why don't they add another 200
tones of dead weight and say they have the heaviest rocket in the world. |
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c*********r
发帖数: 19468 | 26 几百公斤是F-14的可变机构本身带来的重量，你自己google下呗
要考虑间接重量变化，这个就难说了，还有说反过来的：
Ray Whitford (Design for Air Combat, Jane's Information Group, 1989, pp. 72)
conflicting requirement of high maximum Mach number, subsonic loiter and
carrier suitability but found that this required a larger wing area and a
higher thrust to weight ratio, making the fixed wing design considerably
heavier (about 4500 lbs heavier). |
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l****z
发帖数: 29846 | 27 by Bruce N. Eimer, Ph.D
The question is often asked, “what is the best handgun for concealed carry?
” There are many valid answers to this question and they usually begin with
, “well, it depends on a number of factors.” However, in my humble opinion
, there is one universally valid answer, and that is, “it is the gun that
you have on you when you need it.” With that said, the purpose of this
brief article is to make you aware of twelve handguns that are so easy to
carry, that there is no excuse... 阅读全帖 |
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y*****a
发帖数: 580 | 28 1. It is higher. so if head-on or rear-on, the other car will be beneath
the car and thus less damage to the driver's cabin.
2. It is likely heavier (and may be much heavier), and longer buffers in
accidents. Likely to be safer.
2. Towing capacity. PPl buying suvs and vans are family-oriented, and may
require frequent towing from home improvement or furniture stores, or off-
road recreation activities.
drawbacks:
1. some is too large (e.g. suburban) and regular garage barely fit.
2. bigger b |
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c******g
发帖数: 2323 | 29 2012 passat sel curb weight is 3314. Yout data are not correct. I agree new
passat is light. All old passat are over 3500. It is true the old saying
that german cars are heavier. But now we have to say these two new models
are similar now. Still when you buy used cars, it sitll applies that german
cars
are heavier. |
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m*********g
发帖数: 10735 | 30 A4和CAMRY是不能摆在一起对比的，属于不同的class，具体请参考官方说明
A4车重3,500lbs
CAMRY车重3,100lbs
A4大约是CAMRY的1.13倍
相同速度的情况下，根据最简单的动能=1/2*mv2，重量越大的话动能自然就越大
撞击的过程是本质上是一个能量转化的过程：动能转化为材料的弹性势能
动能越大，转化的势能也就越大
势能是如何体现的呢？正是通过材料的形变
采用相同材料相同结构的情况下，重量越大的话不难预见形变也会更大
所以这也是为什么官方会说：自重越大的车辆，撞击会比较严重。
Frontal crash test results can't be used to compare vehicle performance
across weight classes. That's because the kinetic energy involved in the
moderate overlap and small overlap frontal tests depends on the speed and
weight of the test vehicl... 阅读全帖 |
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g********d
发帖数: 19244 | 32 ☆─────────────────────────────────────☆
felixcat (felixcat) 于 (Thu Mar 7 17:01:19 2013, 美东) 提到:
发现有一些人存在误解：认为碰撞测试成绩能代表有没有用高强度/超高强度/极高强度
钢材来造车身，有没有“不计成本”来给好货给消费者。从而一旦发现碰撞测试看上去
不好，就觉得车厂没有用好钢材省成本。
事实上并非这样，我下面列举一些具体的车型的车体结构，大家就能发现一些碰撞测试
成绩很好的车子，事实上并没有用很高强度的材料；而一些碰撞测试让人觉得成绩一般
的车子，事实上却是用了很不错的钢材。造成这种直觉上“对不上号”的原因在于，碰
撞测试成绩不完全取决于钢材硬度，它还跟车体形状、能量传递的设计意图有关。
首先看Audi A4。在small overlap碰撞测试成绩出来之后，这车子的结构强度在公众心
目中马上从天堂掉到了地狱。A柱拦腰截断，这不像话。
但是实际上A4车身框架用料极其足，车身结构有65%是强度超过300 MPa的高强度钢制造
；在这里面又有占全车身18%的材料是强度在500到1... 阅读全帖 |
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e*f
发帖数: 1709 | 33
You can google "Jetta tdi forum".
Also Chevy Cruze diesel is a similar car with mpg 27/46. It's pretty amazing
since it weights 3.5k lbs, heavier than a lot of mid-sized sedans. I like
heavier sedans for safety. |
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t**********0
发帖数: 1323 | 34 Size and weight affect injury likelihood in all kinds of crashes. In a
collision involving two vehicles that differ in size and weight, the people
in the smaller, lighter vehicle will be at a disadvantage. The bigger,
heavier vehicle will push the smaller, lighter one backward during the
impact. This means there will be less force on the occupants of the heavier
vehicle and more on the people in the lighter vehicle. Greater force means
greater risk, so the likelihood of injury goes up in the sma... 阅读全帖 |
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n*********a
发帖数: 20 | 35 I bought the Toyota Highlander SUV in 2002. Its engine caught a fire and
completely burned down in November 2013. Here is what happened.
I was driving to the airport in an early morning. When I stopped at a
traffic light, I smelled a very slight burning smell. So I opened the window
, but did not smell anything strange from outside. Since the smell was so
slight, I continued driving for about 2 miles until I totally lost power. I
stopped on the right side of the road. As soon as I parked, smoke ... 阅读全帖 |
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a*******a
发帖数: 4233 | 36 IIHS
车越大越重越安全，哪怕拉着一箱砖都会比空车安全。（比较同款hybrid和非
hybrid死亡率，hybrid有电池压秤胜出）
Are people less likely to be killed or injured in a bigger, heavier vehicle?
Yes. Driver death rates calculated by IIHS illustrate the real-world
advantages of bigger, heavier vehicles. For example, as a group, in 2012
very large cars 1-3 years old had 20 deaths per million registered vehicles,
while minicars had 77. Of the 26 vehicles with the lowest driver death
rates from the 2005-08 model years during 2006-09, all but three ... 阅读全帖 |
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b*****g
发帖数: 2322 | 37 Small/light vehicles have less structure and size to absorb crash energy,
so crash forces on occupants will be higher. People in lighter vehicles are
at a disadvantage in collisions with heavier vehicles. Pickups and SUVs are
proportionally more likely than cars to be in fatal single-vehicle crashes,
especially rollovers. However, pickups and SUVs generally are heavier than
cars, so occupant deaths in SUVs and pickups are less likely to occur in
multiple-vehicle crashes.
最安全的还是Large SUV AWD |
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D***0
发帖数: 5214 | 38 虽说我觉得这是脱裤子放屁... 直接贴结论
"We found that vehicle type, curb weight and price are all significant
predictors of personal injury cost," said Jehle. "For every additional $10,
000 you spend, injuries go down by almost 12 percent. We also found that for
every 1,000-pound increase in weight, vehicles were 19 percent safer.
"One of our most surprising findings is that some of the most popular cars
on the road fell into the least safe category. For example, the 2-door Honda
Accord and the 4-door Honda Civi... 阅读全帖 |
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t********i
发帖数: 7856 | 39 关于车重，IIHS有这些说明：
http://www.iihs.org/iihs/ratings/ratings-info/frontal-crash-tests
Frontal crash test results can't be used to compare vehicle performance
across weight classes. That's because the kinetic energy involved in the
moderate overlap and small overlap frontal tests depends on the speed and
weight of the test vehicle. Thus, the crash is more severe for heavier
vehicles.
Given equivalent frontal ratings, the heavier of two vehicles usually offers
better protection in real-world crashes.
... 阅读全帖 |
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发帖数: 1 | 40 Sequoia is heavier than Expedition, Tahoe and even Suburban.
Highlander is slightly lighter than Explorer, but heavier than Traverse.
You speak based on imagination, or data/fact? |
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m***s
发帖数: 215 | 41 Should be fine.
I follow a simple rule when looking at receiver:
Sony, Pioneer, Yamaha, Denon and Onkyo are about the same. If you want to
compare two models, compare their weight, the heavier the better :)
The reason is the heavier one has better transformer. |
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P*****P
发帖数: 64 | 42 5 jars of pills, one with pills 0.1 g heavier than the rest 4. you are given
a scales, find out the jar with heavier pills |
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g*******y
发帖数: 1930 | 43 第二次是
A1+A2+B1 vs A3+A4+B2
if result is equal, then one of B3, B4 is lighter
if result is >， then one of A1, A2 is heavier or B2 is lighter
if result is >, then one of A3, A4 is heavier or B1 is lighter |
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r*********u
发帖数: 75 | 44 The Google hiring process is designed to hire the most talented, creative,
and articulate people in the world who will be the best fit for Google. The
Google culture is different. You notice it the moment you walk on campus. It
isn’t for everyone, but it works amazingly well for Google. That is why
cultural fit is so important. There is a lot of mystery and misinformation
about the Google hiring process so I would like to give you my perspective
on how it works, and more importantly, why it work... 阅读全帖 |
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C******e
发帖数: 11790 | 45 认木头真的这么难呀。我再网上看的这个帖子，是有经验人写的。看看他猜的，和正确
的结果。
My Guesses:
Black Walnut – Color and grain look right, and it’s a common hardwood,
so it’s a solid guess; weight is a bit high: is this board still drying?
Honduran Mahogany – Grain might be a little plain, but the pattern
looks right, and the weight feels close.
White Ash – The color and coarse grain looks like ash, though the
weight seems a bit too light: maybe the sample is from a very dry location?
Zebrawood – What other wood has th... 阅读全帖 |
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h*****y
发帖数: 997 | 46 you know why front load were so popular in US?
american like to put big load in the washing machine and front load handles
heavier load very well, it rolls the load and the clother presses each other
by gravity, so heavier load actually helps the performance as the clothes
were pressed on each other even harder.
top load can't handle heavy load well, compared with front load.
however you have to keep the door opened when it's not used to avoid foul
smell. I know some family find it difficult as... 阅读全帖 |
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m*********7
发帖数: 5207 | 47 My baby is 4.5 month old, and I am 7 pounds heavier than before.
I can fit in most of my pre-pregnancy outfits now. Some people say I am
heavier due to building muscles, especially on the upper arms. If you carry
your baby a lot, you will understand what I mean, hehe... |
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s*******c
发帖数: 5161 | 48 I have both.......we have the pink dot ignite and navy jet......
unfortunately I owned the igngite first, so I was spoiled. But the jet is a
nice stroller and better than a lot I've seen.
The Ignite has much sturdier fabric overall and a more structured back to
the seat, there is actually a metal x behind the fabric,(which makes it more
flat back like your full size strollers) a inch wider seat base, almost 2
inch taller back of seat, and the locking front wheels for terrain.....it
has one paren... 阅读全帖 |
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c*********7
发帖数: 7607 | 49 A Kindle-DX showed up on my door step after about a month from its original
order date. Must have nookitis. I chose the Kindle-DX mainly because of the
screen size, native PDF support, and I was accustomed to the Kindle user
interface with my Kindle 1st generation. Plus the KDX is already available
on the market. I really liked the K-1 but wanted more functionality and a
few of its nuisances addressed.
You might consider the KDX an anachronism with the iThing is on its way in
60 or so days. In ... 阅读全帖 |
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O***n
发帖数: 13127 | 50 actually i prefer peets coffee.
my taste is becoming heavier and heavier. |
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