d**y
发帖数: 18174 | 1 他的衣服貌似不错，我还没这个牌子的湿衣。可惜太贵。不知道比xterra怎么样？
Gear Review: blueseventy Helix Wetsuit
Wetsuits are one of the larger gear investments a budding triathlete can
make; behind a bike and/or race wheels (if, of course, you fall into USAT's
median income range of approximately $108,000), it is likely a wetsuit will
be your most expensive piece of gear.
With that kind of money on the line, then, it stands to be prudent when it
comes to selection. Much like when it comes to proper triathlon bikes and
running s... 阅读全帖 |
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j***y
发帖数: 5098 | 2 ☆─────────────────────────────────────☆
Regina (猫宝宝) 于 (Mon Jul 4 03:04:48 2011, 美东) 提到:
体重降到110磅以内了，但是两腿膝盖都疼，是不是在水泥路上跑的缘故？
☆─────────────────────────────────────☆
dathinker (思考者) 于 (Mon Jul 4 08:29:57 2011, 美东) 提到:
每天一万二什么东西？一万两千麦？
其实膝盖痛的原因可能很多
比如跑姿不对，过劳损，受了寒凉，以及cushion不够等等
还要问问是觉得神经痛那种如针扎似的痛，还是有些肿的那种肿痛？
多说说症状比较好分析
☆─────────────────────────────────────☆
Regina (猫宝宝) 于 (Mon Jul 4 13:21:30 2011, 美东) 提到:
每天1万两千米，大约是7.5迈
是那种肿痛，腿外侧和膝盖肿痛的那种痛。
☆─────────────────────────────────────... 阅读全帖 |
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i*********5
发帖数: 19210 | 3 my wife ended up in emergency after a jellyfish attack in Savannah. (while i
got attacked by poison ivy in the same trip, so we stayed away from the
states for a number of years after that.)
back to wetsuit topic, wetsuit 1. keeps you warm, 2. provide additional
buoyancy, 3. make you faster (because of less drag, and also partially
because now you can spend most of your energy propelling forward).
i'm a very bad swimmer, and i'm still learning. if i didn't have my wetsuit
on, i couldn't have fin... 阅读全帖 |
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i*********5
发帖数: 19210 | 4 【 以下文字转载自 Tri 讨论区 】
发信人: ironman2015 (1/2 ironman x3), 信区: Tri
标 题: 头的位置 - Choosing The Right Head Position For You
发信站: BBS 未名空间站 (Mon Mar 11 12:08:36 2013, 美东)
在过去两年的自由泳学习过程中，我听到的建议都是头要低，收下巴，眼睛看正下方，
“swim downhill”，头低了，腿就浮起来了，减少阻力。
直到上周跟高阳游泳时，他给我指出我的头太低了，造成头一上（换气）一下，反而增
大了阻力。建议我头可以高一些，水面刚好高过眉毛就行了，这样游开水时也更容易换
气。我说那腿会不会沉得更厉害？他说等你打水练出来了下身自然就浮起来了。
于是我试了试把头抬高些，看pool的斜前方，好像的确游得更流畅些。
回来上网搜索相关资料，找到这篇Swim Smooth的文章是支持他的观点的。
Choosing The Right Head Position For You
http://www.feelforthewater.com/2012/0... 阅读全帖 |
|
R******d
发帖数: 5739 | 5 Why am I agreeing with harr? The Archimedes principle says that the
buoyancy of an object equals to the weight of the fluid displaced by the
object. If the object weighs 2 kg, the buoyancy is 2 kg, the weight of
water displace is 2 kg. u have 1 kg water here, I don't see how this is
done. |
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s******r
发帖数: 2876 | 6 记错了定律。
Why am I agreeing with harr? The Archimedes principle says that the
buoyancy of an object equals to the weight of the fluid displaced by the
object. If the object weighs 2 kg, the buoyancy is 2 kg, the weight of
water displace is 2 kg. u have 1 kg water here, I don't see how this is
done. |
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M*****e
发帖数: 279 | 7 一个教你美国英语和美国音的网站：
http://www.seattlelearning.com/
Pronunciation Podcast homepage
http://www.pronuncian.com/podcast.aspx
美国英语发音难，我认为原因之一: 美国人独立后，为了不同于英国英语（除了美国以
外的英语，包括英国、加拿大、澳大利亚），故意搞出了一些不同的发音规则 (you
may blame Noah Webster)。把一些合理的英国英语的发音、拼写和语法，故意改了。
对我们来说，也就是创造了新的特例(exceptions).
发音：
这次London 奥运opening ceremony上, NBC的主持人在Laos队入场时说，我们美国说
Lao, 但是Laos人说Laos. 比如美国人发Illinois是发Illinoi音。
LZ举的water例子，说water 发wader。类似的例子还有forty发fordy；thirty 发
thirdy。其实这是“送气音”和“不送气音”的区别。不能将"t"发成声带振动的"d"的。
我认为标准的发音仍然是发"t" (w... 阅读全帖 |
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d****y
发帖数: 2180 | 8 ☆─────────────────────────────────────☆
fatgirl12 (fatgirl) 于 (Sun Jul 29 02:09:43 2012, 美东) 提到:
Sofa!
☆─────────────────────────────────────☆
medwater (小麦) 于 (Sun Jul 29 09:47:23 2012, 美东) 提到:
thumbs up
☆─────────────────────────────────────☆
memorize (memorize) 于 (Sun Jul 29 10:29:42 2012, 美东) 提到:
佩服 神级大姐
☆─────────────────────────────────────☆
largebird (largebird) 于 (Sun Jul 29 10:58:06 2012, 美东) 提到:
那唱歌当例子很好的，注意，吞音不好，但是大多数国人是跑调，英语的语调韵律不准
，吞音是高层次问题。所以，要口语好，首先是语调要准，韵律不乱。
... 阅读全帖 |
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i*********5
发帖数: 19210 | 9 在过去两年的自由泳学习过程中，我听到的建议都是头要低，收下巴，眼睛看正下方，
“swim downhill”，头低了，腿就浮起来了，减少阻力。
直到上周跟高阳游泳时，他给我指出我的头太低了，造成头一上（换气）一下，反而增
大了阻力。建议我头可以高一些，水面刚好高过眉毛就行了，这样游开水时也更容易换
气。我说那腿会不会沉得更厉害？他说等你打水练出来了下身自然就浮起来了。
于是我试了试把头抬高些，看pool的斜前方，好像的确游得更流畅些。
回来上网搜索相关资料，找到这篇Swim Smooth的文章是支持他的观点的。
Choosing The Right Head Position For You
http://www.feelforthewater.com/2012/04/choosing-right-head-posi
Many swimmers (and some coaches) believe that every swimmer should look
straight down at the bottom of the pool when they swim, so as to... 阅读全帖 |
|
c**i
发帖数: 6973 | 10 (1) Flying saucers; Aeronautics: A new type of dirigible could make it
easier to deliver people and provisions to inaccessible places. It looks
pretty cool, too.
http://www.economist.com/node/17647537?story_id=17647537
("The company is developing a piloted dirigible capable of carrying loads of
up to 150 tonnes over distances as great as 2,000km (1,240 miles) at a
speed of 45 knots (83kph)")
(a) dirigible (Latin dirigere)
(adj): "capable of being steered"
(n): AIRSHIP
(b)
(i) Voith-Schneider pro... 阅读全帖 |
|
|
T4
发帖数: 273 | 12 Addition of South Africa to the former BRICS format seems to have galvanized
the grouping. The five countries agreed to expand use of their own
currencies in trade with each other - an important step toward putting the
dollar into a new downsized place. One key influence is the annual expansion
of China's trade volume with other core countries by 40% in 2010 - and the
buoyancy looks set to continue. The BRICS' state development banks,
including the China Development Bank, agreed to use their own... 阅读全帖 |
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c**i
发帖数: 6973 | 13 Harpoon is A/R/UGM-84.
AGM stands for air-to-ground missile; RGM Radar Guided Missile; UGM
Underwater Guided Missile.
(1) Harpoon Block II; Backgrounder. Boeing, undated.
http://www.boeing.com/defense-space
/missiles/harpoon/docs/HarpoonBlockIIBackgrounder.pdf
Quote:
"Weight:
1,160 lb. Air configuration
1,459 lb. ASROC configuration
1,520 lb. TARTAR configuration
1,523 lb. Capsule/canister configuration
"Propulsion: Air-breathing turbojet engine (cruise), solid-propellant
booster
Note:
(a) RUR-5... 阅读全帖 |
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x****u
发帖数: 12955 | 14
buoyancy is determined only by the volume of the water displaced, not the
total amount of the water around it. |
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L*******o
发帖数: 895 | 15 1. Isaac Newton - English. Quantified and Qualified laws of motion and
gravity. Invented the reflecting telescope. Explained the concept of light
dispersion and co-invented the Calculus.
2. Albert Einstein - German/Swiss/American - Developed Theories of Special
and General Relativity. Described Brownian Motion. Nobel Prize winner for
his work on the photoelectric effect. Showed mass-energy equivalence.
3. Galileo Galilei - Italian - Discovered the law of Uniformly accelerated
motion. Improved on... 阅读全帖 |
|
发帖数: 1 | 16 Missouri City, Houston men caught up in alleged espionage scheme involving
Chinese company
Published 11:13 am, Friday, April 27, 2018
WASHINGTON - Several Texas residents have been caught up in an alleged
espionage scheme, including residents of Missouri City and the greater
Houston area.
Two businessmen, including one who is a Chinese national, have been indicted
on charges alleging that they conspired to commit economic espionage and
steal trade secrets from a business in the United States on ... 阅读全帖 |
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P****i
发帖数: 12972 | 17 潜艇造得太重了，多出70吨，是因为小数点点错了。不亏是拉美国家的祖宗。
http://o.canada.com/news/spain-builds-submarine-70-tons-too-heavy
HARTFORD, Conn. — A new, Spanish-designed submarine has a weighty problem:
The vessel is more than 70 tons too heavy, and officials fear if it goes out
to sea, it will not be able to surface.
And a former Spanish official says the problem can be traced to a miscalcula
tion — someone apparently put a decimal point in the wrong place.
“It was a fatal mistake,” said Rafael Bardaji, who until recent... 阅读全帖 |
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c**i
发帖数: 6973 | 18 (m) quinoa (n: Spanish, which is derived from a local language): "an annual
herb (Chenopodium quinoa) of the goosefoot family that is native to the
Andean highlands and is cultivated for its starchy seeds which are used as
food and ground into flour; also : its seeds"
http://en.wikipedia.org/wiki/Quinoa
(n) duxelles
http://en.wikipedia.org/wiki/Duxelles
(o) ballast (n):
"1: a heavy substance placed in such a way as to improve stability and
control (as of the draft of a ship or the buoyancy of a ... 阅读全帖 |
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m***y
发帖数: 14763 | 19 In New England? Then it's a different story.
When the ground is completely soaked, it's more like liquid than solid. Like
in other liquid, the buoyancy force will kick in, so, your house started "
floating up". Especially, if the backfill was dry, and now it is soaked. The
expansion might lift up your house.
During the drought, keep "deep watering" your ground, so that the condition
won't change drastically when it finally rains. This is especially. critical
when your house is still settling dow |
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w*******e
发帖数: 135 | 20 昨天做的Inspection，晚上收到报告。第一次做买房inspection，对报告里的各种问题
的严重程度和花费都没经验，昨晚在网上搜了一些相关资料，但还是有很多拿不准的，
想请教版上的xdjms给看看，（知道不可能让卖家全部或者大部分cover，）怎么选择要
修的跟卖家谈。这个报告里问题还不少: ( 房子是90年代的。
****************************************************************************
*********
Major:
1. Trim/Overhang Cladding: Wood rot noted on trim. We are unable to
investigate if the damage is more than surface damage. Recommend a qualified
carpenter evaluate the cause and correct as needed.
2. Vent/Exhaust Condition: Water Heater- Exhau... 阅读全帖 |
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g********4
发帖数: 4959 | 21 发信人: T4 (T4), 信区: Military
标 题: BRICS to expand use of their own currencies in trade with each other
发信站: BBS 未名空间站 (Mon Apr 18 11:36:09 2011, 美东)
Addition of South Africa to the former BRICS format seems to have galvanized
the grouping. The five countries agreed to expand use of their own
currencies in trade with each other - an important step toward putting the
dollar into a new downsized place. One key influence is the annual expansion
of China's trade volume with other core countries by 40%... 阅读全帖 |
|
y***r
发帖数: 16594 | 22 人都是放松的心情。
一边喝着绿山咖啡，一边浏览TIF网站，人有一种buoyance的感觉。 |
|
c*****r
发帖数: 529 | 23 http://truthcdm.com/this-could-be-the-end-for-big-oil/
This Could be the End for Big Oil
stunning breakthrough in chemical engineering has unleashed a massive supply
of fuel…
Enough fuel, in fact, to power the entire globe for over 36,000 years.
It’s poised to decimate Big Oil’s obscene profits, make OPEC obsolete, and
hand the United States 100% energy independence.
In fact, the U.S. Department of Defense just invested $7 billion in a single
day…
Apple, Google, and Facebook are spending billion... 阅读全帖 |
|
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c***a
发帖数: 133 | 25 if the water is warm enough, no wet suite needed.
If you wear wet suite, u will get enough buoyancy.
泳镜呼吸管 and maybe a pair of fins - it will help you to kick, but
initially it feels weird if you have never used it before. there are
different prices range for fins. |
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s*********t
发帖数: 16647 | 26 谁能教会我游泳就NB了，我从buoyancy上说是natural sinker |
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i*****s
发帖数: 15215 | 27 Help to Solve the Pacific Northwest's Floating Feet Case
On Tuesday another foot washed ashore in the Pacific Northwest. The
discovery marks the eleventh found on the BC coast since 2007. Three others
came ashore in nearby Washington state. The first foot, discovered in August
2007 on Jedediah Island, BC, was associated with a deceased man whose name
police withheld at the request of his family. A man’s right foot found on
Gabriola Island in August 2007 remains unidentified. Two feet found on
Va... 阅读全帖 |
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G***G
发帖数: 16778 | 28 are there any moments in your life when you don't think they are right?
Newton's first law and second law.
and Aristotle's buoyancy.
Have you ever doubted about them?
If not, you are not smarter than the two scientists. |
|
发帖数: 1 | 29
Bucktail 船釣 岸釣都可以用。重量要配合水流速度深度，porkrind Grub都可以用只
是buoyancy不同。BC用習慣了改回spinning 有點彆扭。 |
|
s****x
发帖数: 686 | 30 发一个前天出的事故，大家一定要引以为戒！
Dive #25, Kelp Forest, Point Loma
depth: 81 feet, length: 24 mins, temperature: 56 F
这次是跟着boat Marrisa出海，到Point Loma的Kelp Forest。Buddy 是新手，neutral
buoyancy控制的还不太好, 开始怎么也下不去，divemaster就在他身上加了6磅的重量
，这一下就像称坨似的比我沉的都快。
水下很冷，能见度也不够高。到了底，慢慢往forest里面游。Kelp 是从海底能长得很
高很高的水草，由于有kelp的地方营养非常丰富，底下总是有很多小鱼和各种小生物栖
息。我们在reef附近转了转，看到很多五颜六色的海星，珊瑚，海胆，海参，还有鱼。
Kelp随着浪左右摇曳，抬头也望不到顶，实在是一种很神秘的感觉。本来想抓点海胆带
回去吃，结果发现它们都躲在石头缝里面不肯出来，害得我抓了半天什么都没抓到，有
些扫兴。
由于潜的很深，气用的很快，我们决定上浮。开始两个人步调还很一致，后来我上到了
50feet左右，回头一看，b |
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n*****a
发帖数: 1327 | 31 14 lbs last year and 12 lbs this year with 7mm full wetsuit.
It gets neutral buoyancy at 15 ft or deeper. |
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n*****a
发帖数: 1327 | 32 This depth is where shallow water blackout typically starts to happen. the
diver should maintain positive buoyancy to float up if something bad happens.
I got the weight from local dive shop. A set with new weights should be
around $35 for SoCal condition? |
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d**r
发帖数: 352 | 33 装备：
最重要的是许可证了：CA sport fishing license 和lobster report card。本地的潜
水店
或连锁的sport chalet 都可购买。在洛杉矶，这里有个链接供参考。
http://golosangeles.about.com/library/BLPages/BLFishLicense1.htm
今年一共是$48。如果是坐船的话，许可证应带上船。如果是在海滩的话，许可证可留
在车里，以备检
查。
除了一般的潜水装备外，还要有lobster gauge和网。
lobster gauge用于衡量龙虾是否符合捕捉标准。注意不同州有不同的标准，应购买本
州的gauge。
gauge就是这个了。还有一种是可以装在电筒上的，个人比较喜欢这种。
网一般就像下图那样的。底部是网状的，供龙虾附着在上。图的另一面有 钩子，可附
着在BC
（Buoyancy Compensator，一种马甲穿在潜水服上，控制下潜和上浮）上。
手电筒：对捕捉昼伏夜出的龙虾，好的手电筒太重要了。白天，龙虾躲在岩石缝中，晚
上才从洞中出来
觅食。
好的手电筒可以帮助猎手在更远的距离发现 |
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S********t
发帖数: 18987 | 34 Peak Performance Buoyancy 就学精确控制浮力平衡，
带太多重不容易控制, |
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h***o
发帖数: 5030 | 35 这个周末就考试了
周六
Peak Performance Buoyancy
Navigation Dive
Night Dive
周日
Deep dive
Search and Recovery
正在家拼命看书呢 |
|
un
发帖数: 1311 | 36 I'm probably one of the most inexperienced taking the GUE fundies, with only
31 dives under my weightbelt. Well, I don't really wear a weightbelt
nowadays, as my instructor Leon and my buddy Agnes had persuaded me out of
it in favor of the backplate system on my 18th dive.
I'd been diving with them for 27 of my 31 dives, and hanging out with some
divers from time to time. i.e., I'm well educated in horror stories about
Leon's fundies course. On our second day of the course, I actually asked
Leon... 阅读全帖 |
|
un
发帖数: 1311 | 37 最开始是PADI open water
PADI教练良莠不齐，好多地方就是只想挣钱，根本学不到什么，而且安全意识挺差的
找朋友介绍个好的dive shop，就找到这家GUE的，一下就click上了
后来一直跟他们潜，PADI advanced open water也是跟这个教练上的
他加了很多GUE的东西，像kick, buoyancy, trim之类的
我非常喜欢
然后我buddy想考tech diving，就拉我上这个fundamentals |
|
un
发帖数: 1311 | 38 en, I haven't tried dry suit yet...
heard the buoyancy takes some practics... |
|
un
发帖数: 1311 | 39 en, I haven't tried dry suit yet...
heard the buoyancy takes some practics... |
|
un
发帖数: 1311 | 40 Most people I know don't need any weight for 3mm wetsuit + aluminum doublt
tank
(of course they all have a backplate but most are aluminum as well, like 2lb)
I'm not sure why I need one weight now,
maybe I still have problem getting air out of the wider wing
Another thing is,
I don't like to be heavily overweighted and rely solely on BC
more air in BC = buoyancy changes a lot by depth
and in case of "out of air" or wing failure
I hope I can swim myself up to the surface
of course with drysuit it... 阅读全帖 |
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un
发帖数: 1311 | 41 en, true. I took it for granted that the steel tanks are similar to aluminum
ones we use except for the weight.
My buddy doesn't even use weight on single tank,I'm totally impressed.
I used 2 weights in the ocean for single tank.
we check for buoyancy at 30bar, 3 meters, not totally empty, hehe |
|
i*********5
发帖数: 19210 | 42 actually, those extra few pounds become your invisible wetsuit that provides
the buoyancy.
, |
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w****1
发帖数: 4931 | 43 I have a problem of sinking legs in swimming. It had not been a problem when
I was younger (and not a runner then). The wetsuit lifts my legs a little
and that makes me quite a bit faster. My body position in swimming is quite
awful. Even my wife who is not at all athletic and does not know how to swim freestyle properly would easily outperform me in freestyle kick or dolphin kick drills.
i
wetsuit
1500m
buoyancy, |
|
b******d
发帖数: 28 | 44 昨天听了文哥和涛哥的教诲, 受益非浅. 尤其是文哥说从50到100m没那么难,
其意义不亚于十月革命一声炮想, 让中国人民看到了希望. 今天我一入水就
努力让自己保持很低的打腿频率, 手上的动作也做到不急不慢, 尽量把动作
做到位, 然后竟连续爬泳游了150m. 其实我感觉自己还能继续游下去, 只是在150m
到岸时, 心里一阵狂喜, 不禁想仰天长笑, 然后就听下了.停下后气一点儿也
不急, 腿竟然一点儿也不累,而昨天之前我每次挣扎完50m两条腿都是要抽筋到
脚趾头的感觉. 在这之后我又来来回回的游了几个50m,半小时内完成了600m,
而我从前一小时内只能总共爬泳150, 其他时间只能游蛙泳. (高手莫笑).
今天游完之后感觉太好了, 根本不象原来憋的喘不过来气的样子, 总算明白了
去年游泳老师对我说: trust your buoyancy. 再也不要浪费宝贵的氧气去拼命
打水了! 明天冲击连续游200m, hoho! |
|
w**********p
发帖数: 559 | 45 Survival floating (also known as dead man float): Lying on the prone (face
down in water) with minimal leg movement, and staying afloat with the
natural buoyancy. Lift the head to breathe only then back to floating. This
style is only to stay afloat and to rest.
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
How to Survival Float
Also known as the "jellyfish" or "dead man's float", the survival float is
one of the most important skills for swimmers to learn, since it c |
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w****1
发帖数: 4931 | 46 I got my wetsuit earlier this week, neosports, 5mm sleeveless, and couldn't
wait to try it out. Went to the beach today with my wife and daughter, and
took a swim while they played in the sand. The water temperature was
probably in the low 70s, pretty cold by the normal standard, but it was
PERFECT with the wetsuit! I was also surprised by the buoyancy the wetsuit
provided me. It makes free style swimming so much easier. I had always
worried about drinking sea water, but once I was mentally prep |
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w**********p
发帖数: 559 | 47 One should learned how to float first.
It will make treading water easier.
Survival floating (also known as dead man float): Lying on the prone (face
down in water) with minimal leg movement, and staying afloat with the
natural buoyancy. Lift the head to breathe only then back to floating. This
style is only to stay afloat and to rest.
http://www.youtube.com/watch?v=kMeierw40nQ
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How to Survival Float
Also known as the "jell |
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s******p
发帖数: 819 | 48 Today’s race is a great start of the long weekend. I arrived at the start
around 7:20am. It’s my first open water with a wet suite. I tried it last
night at home and it’s quite an effort to put it on and take off. This
morning I applied some Vaseline around ankle and calf area. It was much
easier to put on the suite with the help of lubricant. Also make sure you
get to use the bathroom before you put on the wet suite. Otherwise you would
redo 75% of the work.
The race size is about 400 people. T... 阅读全帖 |
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c*********e
发帖数: 1389 | 49 1. this is critical in implementing good shoulder rotation and reducing side
torque for recovery arm. it also creates better angle for entering the
water and reduces drag. chest becomes lower and creates more buoyance.
2.it can be harmful if you don't have enough body rotation.
one of my favorite video，you can see how olympics gold medalist carries out
above 2 points. and you also should pay attention to his kicking rhythm. he
is swimming at 1:10/100meter pace.isn't it amazing?
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c*********e
发帖数: 1389 | 50 No. Keep it slightly less than 180 as a beginner. if you over-extend your
arm, your body may start twisting left and right. and your shoulder may get
injured if you pull hard before EVF is completely formed.
when you are swimming, you don't get the buoyancy from the kick board so
that your upper will sink and legs will come up. the streamline is better
than kicking with a board.
flexibility |
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