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全部话题 - 话题: dihedral
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x******n
发帖数: 1328
1
来自主题: Outdoors版 - 被打击了
根据我在网上看的图片和我回国的经历,好像中国国内都很崇尚overhang的
哪位在国内爬得多的来证实或者证伪一下。
我最怕overhang的了,最喜欢dihedral的。可能是我平衡较差,而dihedral
平衡起来最容易吧。
p*******r
发帖数: 180
2
来自主题: Outdoors版 - [TR] A week in the high Sierra
One week, two guys, a rope & a rack, many classic pitches, all fueled by
unbelievable amount of luck and stoke, shed some blood, lots of sweat, no
tears, simply joy.
List of the routes:
Third Pillar of Dana
East Buttress of Mt Whitney
Mithral Dihedral - Mt Russell
West Face of Cardinal Pinnacle
Red Dihedral of the Incredible Hulk
Cheers!
Our warm-up climb: regular route of 3rd Pillar.
T**r
发帖数: 7016
3
来自主题: Fishing版 - Costco卖的Equinox Kayak
10'4",dihedral hull(好象更稳定一点)
还带paddle,汽车上的泡沫,
看起来不错啊,价格好象也可以,$320
这款用来钓鱼好用吗?
p**********t
发帖数: 2636
4
来自主题: Outdoors版 - PNW 流水
7.18 Drive from Seattle to Smith Rock, stop at Potland on the way sight
seeing.
Climbed the Morning Glory wall, Smith Rock. Led a 5.8 and followed a 5.9 and
a 5.10a. Nice warm up
7.19 Dihedral & Phoenix Buttress, Smith Rock. The rock was very sharp at the
Phoenix Buttress. Painful even without falling! Did seven 5.9-5.10d
routes this day. Too hot to climb during the mid-day.
7.20 John Day Fossil Bed
7.21 am: did a 5-pitch sport 5.9 at the Smith Rock Group, of which I led
three pitches. This is d
p*******r
发帖数: 180
5
来自主题: Outdoors版 - Dragontail Serpentine Arete 8/1/09
supposedly the 2nd 5.8 is right above the finger crack according to the
guidebook. But it feels more like a 5.7. The rest is 5.easy or 4th class
like you said.
the dihedral is about 15 ft left of the finger crack. there is a double
crack systme about 5 to 6 ft right to the finger crack and is supposed to be
a bit easier. I did find the flare finger crack a bit sandbagged.
Most people won't do it this way. It is a rather personal and rational
choice.

ft
since
T*********e
发帖数: 39815
6
来自主题: Outdoors版 - 关于攀岩的狗与猫篇,哈哈
笑死了
居然slab, chimney, dihedral, overhang都能上
p**********t
发帖数: 2636
7
来自主题: Outdoors版 - Wind River - inside the Cirque
第二张照片Wolf's Head中间最大的dihedral是Becky Route (III 5.8)。apprach全是
湿的。
r******h
发帖数: 809
8
来自主题: Outdoors版 - [TR] Prime Rib / 5.9, 11p
Birthday climb :-) 五月底去的那次遗憾很多,一直想再去一次。之前在家连着霉了
一个多月,眼看着日头越来越短,估摸着再不爬今年就没机会了。星期一是个好天,抓
了一个很猛的韩国小mm一起爬。
7点半往右从停车场出发的,approach轻车熟路,很快到了climb base。之前说好前10
个pictch,我lead奇数,Shine lead偶数,最后一个pitch留给Shine。开始爬的时候有
日光了,不过太阳还没出来,手指冻得哆哆嗦嗦的。第一个pitch很简单,不过bolt也
很少,好像只有4个,颇浪费了一点时间在找bolt/route上。第三个pitch开始是个
dihedral,两三个clip之后跨到右面的墙上,那个step对我有点高,折腾了一会。回来
查了一下,居然只有5.7+,郁闷。第四个pitch的rope drag相当大,Shine用对讲机让
我给slack,说她像pull a bus,我说我这头已经给太多了,rope drag,您忍忍吧...
后来上去clean,看她大部分已经用的是single runner的draw,而且后半程基本隔一个
bolt,cl... 阅读全帖
p*******r
发帖数: 180
9
来自主题: Outdoors版 - [TR] A week in the high Sierra
Mt Russell. Both Fishhook Arete & Mithral Dihedral are strikingly visible.
p*******r
发帖数: 180
10
来自主题: Outdoors版 - [TR] A week in the high Sierra
Looking up Mithral Dihedral, a party is on the money pitch.
p*******r
发帖数: 180
11
来自主题: Outdoors版 - [TR] A week in the high Sierra
Bringing up the 2nd on the dihedral pitch. Best pitch of the week, or the
year.
p*******r
发帖数: 180
12
来自主题: Outdoors版 - [TR] A week in the high Sierra
Red Dihedral. I got off route at the end of the crux pitch and found much
harder climbing.
o*****e
发帖数: 379
13
来自主题: Outdoors版 - [TR] Yellowjacket Tower / E flank
星期六早上五点出发,七点到Leavenworth的加油站集合,一起开车到6.1 miles的
trailhead。Leader开了辆BMW的敞篷跑车,有个性。Trailhead那新盖了个小房子,马
路对面有片新开的停车场,以后再找不到营地可以考虑去那里蹭过夜。过了桥之后右转
,挨着就是个三叉路口,沿着中间那个走几步,马上右边就是上山的trail。似乎是在
修路,几条大路中间都停着施工车,把路给堵上了,倒是不容易走错。在停车场抬头就
能看到Yellowjacket Tower了,看着倒不是很远,尖尖的一个山峰。刚开始的那段
trail比较平,两侧鲜花盛开,最多的就是一串串紫色的小花,都开满了。很快路就陡
了起来,大概1 mile上升1500 ft,不过路况非常好,都是很结实的土路,个别地方要
翻个树枝、爬点石头什么的。好几个地方都看到了mountain goat,不过也许是同一只。
我一直以为mountain goat和Ibex是同一种生物、生活在不同的大陆,就跟白种人、黄
种人一样,不过leader一定说他们是两种不同的羊,好吧…
九点前到了main gully脚下,抬头就能看见那个汽... 阅读全帖
p**********t
发帖数: 2636
14
来自主题: Outdoors版 - El Potrero Chico
刚从EPC回来。EPC的信息这个网站上很全,不过有些信息有点过时
http://potrerochico.org/
安全:EPC还是很安全的。过去几年里由于贩毒分子作乱,EPC攀岩的人少了很多,但最
近治安好些了以后今年冬天人数又反弹回几年前的规模了。Monterrey街上有很多拿
machine gun的警察,尤其是天黑以后到处警灯闪耀,还是不要随便乱跑。听开车从美
国来EPC的人说,路上有人会偷你的车牌,然后要给钱才还给你。从Monterrey到
Hidalgo有bus,但没有bus到EPC,下了bus以后要走50分钟的上坡路。Taxi走toll road
的话只需要45分钟。不要从机场或者bus station临时叫出租车,司机一般不会说英文
或者找不到地方。所以比较安全的选择是飞到Monterrey,然后请Magic Ed http://magicedspotrerochico.com/来接。一般camp ground和house rental都提供接机服务。我们坐的是Magic Ed的车,他在EPC呆了20多年了,bolt了很多经典的路线。听老头讲八卦还是很有趣的。
我们住在... 阅读全帖
t**f
发帖数: 536
15
我太笨了,请大家帮忙啦
最近在写一个proposal,study DNA structure。是我们的qualify exam。
老板让我研究一个DNA sequence 的structure
我们用NMR得到distance constraints and dihedral angle constraints。
然后用XPLOR-NIH去calculate the structure
可是我从来没用过XPLOR,我试着读manul啥的,看不懂啊
有没有牛人给解释一下大概的原理,我知道的就是用molecular dynamics 去
minimize energy
但是怎么工作的啊,如果有大牛能指点一下,不胜感激啊。。。
D**u
发帖数: 204
16
来自主题: Quant版 - a triangle inequality
sounds a good suggestion. Then you need to show that
sin(alpha) + sin(beta) >= sin(gamma)
for the dihedral angles.
D**u
发帖数: 204
17
来自主题: Quant版 - a triangle inequality
The law of sin in R^3 is different from the plane case.
In R^3, the law of sin is instead to be:
sin(a)/sin(alpha) = sin(b)/sin(beta) = sin(c)/sin(gamma),
where alpha, beta and gamma are the dihedral angles
between the vectors.
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