f**********n
发帖数: 10757 | 1 其实不是 screen/bubble pass excluded from illegal
down field penalty，其实是他们本来就不违反。这些 ineligible receivers在出球
以后 包括所有 running play就是可以down field block的，实际上OL的 second
level block是OL blocking 能力的重要表现。screen/bubble pass不同的地方在于，
OL 先是表现出 要pass block的样子，引诱DL拼命penetration，然后pass过这些DL，
直接攻击LB，所以时间要掌握好。这跟 draw play有点像，OL 第一步先 后撤，给个
Pass protection的样子，然后等DL Penetrate 以后，其实是 run block。 |
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C*******d
发帖数: 15836 | 2 Ｔotally agree！５.45 surplus is 52 gr, while I see some commercial 70 gr 5.
45 which is called high power ammo. Definitely they have different
penetration power. Also, hollow point ammo should definitely cause much
worse wound than the same caliber full metal jacket one, while it should
have less penetration power on the other hand. |
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f*********n
发帖数: 11154 | 3 http://www.npr.org/templates/story/story.php?storyId=130665381
WASHINGTON October 19, 2010, 07:44 pm ET
Someone fired shots at the Pentagon early Tuesday in what security
officials described as "a random event." No one was injured in the pre-
dawn incident in which shots were fired into two windows at the
sprawling Defense Department just across the Potomac River in suburban
Virginia.
Steven Calvery, director of the civilian Pentagon Force Protection
Agency, told reporters that a number of his o... 阅读全帖 |
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l***a
发帖数: 2677 | 4 刚讨论过
http://www.chuckhawks.com/home_defense_shotgun_ammo.htm
"Number 1 buck is the smallest diameter shot that reliably and consistently
penetrates more than 12 inches of standard ordnance gelatin when fired at
typical shotgun engagement distances. A standard 2 -inch 12 gauge shotshell
contains 16 pellets of #1 buck. The total combined cross sectional area of
the 16 pellets is 1.13 square inches. Compared to the total combined cross
sectional area of the nine pellets in a standard #00 (double-au... 阅读全帖 |
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M*******n
发帖数: 1165 | 5 下面这个网站说5.56 FMJ在indoor使用也没问题啊
Generally high velocity rifle rounds fragment so readily that over-
penetration in an urban (indoor) setting is LESS dangerous than with handgun
or submachinegun rounds like 9mm, 10mm, .40S&W, etc. 5.56 FMJ rounds will
do more penetrating than JHP and JSP rounds but still are generally safer
for interior use- insofar as bystanders are concerned. |
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q*c
发帖数: 9453 | 6 你开车的时候也不能考虑太多车祸的问题吧。
不是照样天天开车。
这也就是备用， 免得万一不行了有骚乱， 自己
在家里就是待罪羔羊一样。 都在家里开枪了， 还担心
over-penetration ? 那时唯一担心的是 penetration 不够吧。
我同事说的好啊， 哪怕被老公打死了， 也比被黑兄弟
慢慢虐待死强的多， 呵呵。
不经常碰枪， 就让他呆在柜子里面就好了。 难道和车一样，
哪怕不用， 每几个月还要换油不成？ 那就土了。 |
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b*****e
发帖数: 5133 | 7 one stop shot没说为什么stop。挨了一枪没事但不想再挨第二枪而停止反抗也是one
shot stop，这个比已经算有争议的ballistic gel测试更有争议。
手枪弹头打到自己闭合有弹性的肌肉组织上，出血不多，你不怕疼不怕死能撑好久呢，
不是去年有人给Speer Gold Dot 124gr+P 9mm打了二十几枪还活着吗。
我基本先看penetration，有了足够penetration再看expansion。又大又重的JHP弹头表
现都比较好，再说打血管神经等擦边球时直径大些更有优势。当然首先是要打准了，接
下来嘛就是勤快点，要打得多些。
我是用9毫米和点四五相互督促，9毫米先打得更快，点四五水平随后设法跟上，然后9
毫米想法打得再快，如此反复练习。 |
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a*****9
发帖数: 805 | 8 The cannonball bounces like a football....
The test was to see the cannon can penetrate the castle wall, and looks like
the penetration is pretty good as an FMJ projectile. :)
Best of all it didn't hit anyone.
Worst of all, this EP wont be on air...
http://www.wired.com/underwire/2011/12/mythbusters-cannonball-m |
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S**********s
发帖数: 4534 | 9 for future reference, it is called cartridge or ammo/ammunition.
shotgun ammo is also called shells.
Bullets are only the projectile in the entire cartridge.
But enough with the lecturing. For personal defense use, any buckshot is
fine.
I personally recommend 2 3/4 inch, one ounce #00 buck, which usually comes
with nine .31 caliber lead pellets. The stopping power is equivlant to nine
.32 acp being shot in the same time. This is one of the most
Readily available loading on the market.
Smaller di... 阅读全帖 |
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l***1
发帖数: 1500 | 10 The problem is the limited availability of suitable ammunition for the 10mm
Auto cartridge. Remington is not offering any 10mm ammo and Federal has only
a single 10mm Light (FBI type) load. The Winchester 10mm factory load with
a 175 grain Silvertip JHP bullet has an advertised muzzle velocity (MV) of
1290 fps and muzzle energy (ME) of 649 ft. lbs. This load offers about the
most energy that can be had from a 10mm factory load, but the Silvertip JHP
handgun bullet is known more for rapid expansi... 阅读全帖 |
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d****h
发帖数: 105 | 11 JHP has more stopping power, less penetration power.
FMJ has more penetration power, less stopping power, slightly better
reliability to feed.
When SHTF, I think FMJ may be more useful.
Keep both! : ) |
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k*****G
发帖数: 697 | 12 美警界要的是stopping power，追求即时效应（lightning bolt）, 非浸透杀伤力（
penetration), 和打猎需要killing power，追求浸透杀伤力（penetration)， 非即时
效应（lightning bolt），是两码事。警察希望一枪就倒未必打死。打猎不在乎猎物多
跑几步，打死最重要。
理论上.45ACP stopping power最好，弹头最重速度最近亚音速，energy transfter最
好所以止动性最好。但弹容量偏小，美帝转而求其次要.40SW。不等于打猎也是这个标
准... |
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a***a
发帖数: 8941 | 13 not good to see cavity
no fluid, so not good to simulate human body
not hard enough, so not good to test penetration
but if you have piles of them, it is ok to test penetration |
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R****y
发帖数: 411 | 14
00 buckshots and slugs may over penetrate and go thru the walls and hit
innocent bystanders, at least thats what I read. I have #4 buckshots x 3
rounds and followed by 00 buckshot x 1 rd and slug x 1rd. I figure if I can'
t neutralize the threat with the first three shots, I can care less about
over penetration. |
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U******u
发帖数: 5829 | 15 so simple?
why not 炸 her half head but only a big hole of right eye?
I thought the ammo backward shot and penetrated into her right eye--the
movie had a special scene on her face which only right eye was big hole, if
as u said it's explore powder, it should explore her head rather than a
penetrating hole only on right eye......
maybe I'm too naive and too academic, movie is a movie, just for fun.......
lol |
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r***6
发帖数: 401 | 16 Maybe I didn't express clearly. I did NOT mean rifle bullet cann't penetrate
two deer. Actually I believe rifle bullet should have much better
penetrating power than shotgun slug.
What I meant is quick follow up. Pump action beats bolt action because you
can recycle the gun while aim a running deer easily without adjusting
mounting position or changing hand holds. You can't do that in bolt action.
Semi auto rifle should be OK.
-rc
★ 发自iPhone App: ChineseWeb 7.8 |
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t******l
发帖数: 10908 | 17 也可以一短一长，一把手枪加一把散弹。。。当然刚才老刑的 app 又死机一次。说明
发帖一定要搞笑，千万不能认真。。。
.223 rem 的 AR / rifle（carbine 长度的）有政治不太正确的问题，还有子弹不能从
开着的门窗飞出去，否则飞很远。。。底线是不能用 FMJ 的子弹，至少要用
Remington PDX1 .223 或者 Honady TAP FPD .223 这种家防/警察专用开花弹，降低
over-penetration 的概率。。。加州最好不要用归类成 assault weapon 的。。。政
治不正确，以及 over-penetration 的考量，各家自己考虑。。。还有就是 rifle 的
psychological stopping power 不如 shotgun。。。另外 rifle 枪声频率高，对耳朵
影响稍大些，当然那个已经不是主要考量了。。。当然 .223 rem 子弹的 rifle (
carbine 长度) 的好处是可以枪弹分开上锁，能快速 ready（magazine feed），以及
后座力小。。。还有就是没有 pump action ... 阅读全帖 |
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b****u
发帖数: 2771 | 18 论坛上讨论 our new guard Ryan Harrow, rivals 给了几个能力的评估 其中有ball
handle 项 and penetration .
A: what's the difference between a "ball handler" and a "penetrator"?
B: One you date and the other you marry.
哈哈 |
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c*******r
发帖数: 13580 | 19 For CE and UIAA certified helmets:
In the lab, the helmet (three samples are tested per helmet model, and each
sample must pass) is mounted on a wooden form that simulates the human head,
with a load sensor located in the head-form’s neck. Of primary importance
is the helmet-top impact test, which drops a 5-kilogram weight (called a
striker) with a 50mm-radius blunt business end onto the helmet’s top from a
height of 2 meters. The resulting force on the neck’s load sensor can’t
exceed 8 kiloNewt... 阅读全帖 |
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e*******e
发帖数: 9616 | 20 Spain has more and earlier penetration in the final. The first goal is
clearly a mindblowing agressiveness that I haven't seen them doing for a
long while.
"Negative possession" is a powerful weapon in your arsenal if you know and
can use it at your will.
Negative possession
These guys are more than outstanding footballers; they are really
intelligent and they are winners. I want to give them credit for that.
However, they have betrayed their philosophy and turned it into something
more negativ... 阅读全帖 |
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w********9
发帖数: 8613 | 21 在作上面提到的远行前，我的小孩刚刚从Montoya的team camp回来。camp有三天，每天
2个半小时，非常intense。Montoya带的MVLA的U12一队和二队里2×18个队员里31个去
了至少一次。通过这次，和两次tryout，我小孩对两个队的情况已经比较了解了。这次
有个小孩去tryout守门员，还有一个在MVLA U11一队的小孩（也与我小孩曾在某个camp
踢过，包括其中的四
场比赛）也去了两次。我在网上登记后，Montoya很nice地允许小孩去，到了现场才发
现是内部的camp。这让我们很感激。
camp的重点是 group and team skills，逐步build up，让我小孩受益不小。可以说，
这是她让她进步的最好的soccer experience。
一些项目有：
coordination plays with passing and shooting
1 and 1 combination plays
small group possession games （including scrimmages）：
3 v 3， with or with... 阅读全帖 |
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w********9
发帖数: 8613 | 22 在作上面提到的远行前，我的小孩刚刚从Montoya的team camp回来。camp有三天，每天
2个半小时，非常intense。Montoya带的MVLA的U12一队和二队里2×18个队员里31个去
了至少一次。通过这次，和两次tryout，我小孩对两个队的情况已经比较了解了。这次
有个小孩去tryout守门员，还有一个在MVLA U11一队的小孩（也与我小孩曾在某个camp
踢过，包括其中的四
场比赛）也去了两次。我在网上登记后，Montoya很nice地允许小孩去，到了现场才发
现是内部的camp。这让我们很感激。
camp的重点是 group and team skills，逐步build up，让我小孩受益不小。可以说，
这是她让她进步的最好的soccer experience。
一些项目有：
coordination plays with passing and shooting
1 and 1 combination plays
small group possession games （including scrimmages）：
3 v 3， with or with... 阅读全帖 |
|
r******n
发帖数: 1665 | 23 Penetration还是平击比较好吧？
我教练就是嫌我旋转过多，球速不够快不够Penetration才让我增加平击的。因为旋转
少又比较帖网，
所以失误也多。但是winner也多了一些。 |
|
b*e
发帖数: 3845 | 24 本版技术贴实在太少，贡献一个我个人的技术体会。教练经常说，要TopSpin就要lower
racquet head，有些教练说，必须至少低一个feet。偶们练习的时候，就牢记racquet
head低才能产生强烈的topspin。最后发现，打出的球怎么都跟老三的球那么相似，有
spin,有高曲线，却没有penetration。
其实Lower Racquet Head的误区在于：Hand (或拍柄）要在contact point的同等高度
或之上，只有拍头（即Racquet Head)低于contact point的高度。也就是你只需要drop
racquet head,而不是drop你的hand！
掌握了这一点，才能打出强烈的有penetration的上旋球。Hand高于球尤其对攻击二发
格外重要。你看Sharapova攻击二发时手举得多高。ps: 老三的正手最大的毛病就是手
举得太低。 |
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a**s
发帖数: 9606 | 25 俺觉得有点太教条了。从物理上来说penetrate是由球向前动量决定的，
而不是topspin决定的。一个纯topspin原地打转的球能penetrate吗？
其实回球是完全由拍子触球时拍头速度方向决定。和你的手的位置握法
没多大关系。原则上同样的来球，只要两次触球时拍头速度方向一致，
打出去的球就一模一样（同样拍子）。
你只要想办法找到适合你的击球方式能增加球向前动量就得了。
lower
racquet
drop |
|
x*d
发帖数: 1696 | 26 最近买了两个拍子，试了7，8把拍子。说一说感受，只集中在一点上，就是怎么能更容
易更多拉上旋。
买了/试了
Boris Becker Melbourne
Wilson Six.One 95 BLX
Babolat Pure Storm Tour
还有其他几个老款的，重量是11oz到12.3oz，重心是10pt HL - 2pt HL.
感受:
(1) 轻拍更容易拉上旋, 当然不能太轻，至少要11oz。重拍太重，plow through太好，
球penetration好却spin不会更多。另外轻拍拍头速度快。所以Nadal用轻拍。
(2) 偏小的握柄比偏大更容易拉上旋，所以Nadal用4 1/4。
(3) 垂直握拍比斜握拍更容易拉上旋，
Edit: Add 3a:
(3a) 16x19上旋好，但是控制不好上旋，18x20旋转可能稍微差，但是是控制的很好的
上旋。 16x20刚刚好。
其他感受:
(4) 稍曲胳膊击球比直膊击球更容易. 老费比较例外，没人能打成他那样。
(5) 握拍松比握拍紧更容易拉上旋，还没彻底肯定，不过道理上握拍紧和用重拍一样，
直接把球打成penetrating.
(... 阅读全帖 |
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B*****2
发帖数: 7520 | 27 教练经常吼：less spin, more penetration!!! 谈何容易啊！刷spin多轻松，lol
不过没人觉得edmund的正手很有penetration吗？ |
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h***k
发帖数: 2262 | 28 关于这个，规则这样写的：
11.2.2 Penetration into the opponent's court, beyond the center line:
11.2.2.1 To touch the opponent's court with a foot(feet) or hand(s) is
permitted, provided that some part of the penetrating foot(feet) or hand(s)
remains either in contact with or directly above the center line.
看来Pitts的确被冤枉了。
扣完球脚后半部分还在中线上，但没刹住重心，后跟抬了起来(球当时还没死）。这个
有争议，他们一个副攻事后还跟我提起，他的观点是只要投影下去没过线就可以，我的
经验（主要来自Yankee league)是脚后跟一抬无法接触中线就会被吹。约好回来后上网
查，我找了一下，是这样一段：
over the center line. As long as the person has p |
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i*********t
发帖数: 5873 | 29 来自主题: LeisureTime版 - 男人于战争 penetration那都是莽汉的干活。又想起来，抹脖子的杀法可以把血放干净，隔壁大叔
宰鸭子的手段不放血。。好多年后，俺刚到美国，和朋友出去吃饭，聊起什么人，朋友
坏笑说那土鳖就像一choked chicken，然后给俺解释这词啥意思，俺现在忘了哈，反正
肯定是和penetration不搭界，哈哈。又讲rocky mountain oyster等等，让俺长了不少
知识。俺说朝鲜人杀狗不放血，俺小时候见过高手宰鸭子也不放血。朋友就很怀疑，说
那肉恐怕不好吃。又过了些年，已经移居欧洲的彪气十足的朋友发来一封邮件说，巴黎
有家专门做鸭子的高档餐馆，那里的鸭子宰杀时概不放血，吃起来非常香嫩，所以
choked是有道理的，云云。。 |
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E*i
发帖数: 5804 | 30 好吧。
disclaimer 1: 我其实挺喜欢gay和les的，很多人都很有风度学识
disclaimer 2: 嘚嘚之类的小朋友请自行捂眼睛。
我和某人有天不知怎么就讨论起gay和les。我说我觉得其实les是一件挺美好的事，你
想两个细腻美丽的胴体，在一起拥抱抚摸亲吻，不是很旖旎么。
然后我就很坑爹地加了一个小尾巴评论（玉狐你看尾巴很要不得），我说：不过就是不
会有真正意义上的penetration.
某人说，当然可以有penetration. 你真的不知道啊？
我说我真的不知道。
某人就说，那你拿小本本记下来。你知道有个东西叫strap-on么？它可以口口口口。。
。[省略若干字]。这样她们可以take turns口口口口。。。。
我听了就坐在那里呆若木鸡。本来脑子里的玉体缠绕的那些旖旎，那些风光，都不在了
。。。:(
某人还说：现在你可以给我付学钱了吧？
我就付给他了一个白眼和一脚。 |
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b*s
发帖数: 82482 | 31 War hammers were developed as a consequence of the ever more prevalent
surface-hardened steel surfacing of wrought iron armours of the late
medieval battlefields during the fourteenth and fifteenth centuries. The
surface of the armour was now as hard as the edge of a blade, so a blade
tended to ricochet. Swords, or the blade of a battleaxe, were likely only to
give a glancing blow, losing much of the impact, especially on the high
curvature of the helmet. The war hammer could deliver the full fo... 阅读全帖 |
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b*s
发帖数: 82482 | 32 很有可能，当时伊拉克的坦克主要是T-72，还不是原装的：
M1A1 uses a conventional space mix of alloy and ceramics yet can resist
several close up T-72 hits during the Gulf war and one famous incident
involving a stranded abrams stuck in the mud had to be abandoned and
destroyed to prevent it from falling into enemy hands.The Abrams was fired
on 4-5 times by another using the M829A1 Sabot round, and couldnt penetrate
the tank……
……it's a well known fact that the massive tank armada of the Iraqis during
the Gulf War consisted... 阅读全帖 |
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T*****e
发帖数: 47 | 33 http://www.youtube.com/watch?v=M1ieWRclcfs
My diplomacy, my security, my hope and my ice-cream,
My tomorrow and my temperature, my lips and my selfishness,
My cigarette, my uncertainty, my penetration,
My notebook and my limit, my importance and my glycerine,
My customer, my function, my lawlessness, my charm,
My hunger, my refusal, my tissue and my vodka,
My omission, my ability, my telephone and my parlour,
My relaxing, my distress, my bedroom, my cassette,
My diction and my pulse, my fortune ... 阅读全帖 |
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k**L
发帖数: 3630 | 34 每次你的帖子都很合我胃口啊.握手. 我也来数一数我修过的镜头.
我修的第一款镜头是Canon FL 1.4.第一颗镜头.花了$30多.结果照片上看来挺好的却是
前后都布满霉菌.后来ebay dispute 了.卖家也许理亏,全额退款,这镜头变免费.后来放
着也是放着.觉得应该死马当活马医,就开始了修镜头的不归路.觉得很上瘾. 经过几个
星期断断续续的维修.终于全面扫清霉菌,但因为没经验,把前面的玻璃摁住旋开的名牌
圈的时候没注意保护,致使前面的玻璃有许多轻微的刮痕.留下遗憾.但以此为戒.以后就
没有了. 你提到你的FD 1.4前面的名牌圈无法打开.其实我有几个技巧也许你可以借鉴.
首先,1.需要耐心. 前期工作可以是尽量的把环壁上的filter槽清理干净,很多时候就是
因为槽里的污渍影响了名环的滑动.2.口径适合的硬朔料杯,或玻璃杯也可以,但要注意
安全.口径要适合,不大不小,要正好可以把杯口扣在名环上但却不会碰到玻璃. 然后大
量的缠绕电工胶布在杯口上. 这样你就DIY了一个名环脱离器.呵呵.不过坏处是你不一
定找得到适合的杯子,如果没杯子怎么办.那就第二招.
3.你的两个大拇指+p... 阅读全帖 |
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b*****d
发帖数: 61690 | 35 【 以下文字转载自 Military 讨论区 】
发信人: brihand (brihand), 信区: Military
标 题: 美帝法治展：斯坦福强奸犯被判6个月
发信站: BBS 未名空间站 (Tue Jun 7 21:05:25 2016, 美东)
Female lawmakers expressed outrage Tuesday over the sexual assault case at
Stanford University that resulted in what critics said was a light sentence
for the convicted attacker.
The attempted rape of an unconscious woman, which took place near a dumpster
behind a fraternity party, is the latest such incident on a college campus
to make headlines and yet another exa... 阅读全帖 |
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