Category: Life

钻石科普与挑选

先开个题目在这里,准备记录一下大概一个礼拜多的研究成果。

一 科普

1 钻石为什么这么闪亮?

钻石有最高的折射率,使得光线在从钻石内部和空气得临界面上更加容易达到全反射临界角从而导致更多得射入光线被捕捉在钻石内部并最终向上反射进入观察者的眼睛,而不是从侧面或者底面通过折射离开钻石(所谓的leakage)。

科普知识点:光速在介质中速度越大,折射率越小。空气得折射率为1,其他介质得折射率大于空气。光线在发生折射得时候,折射率越大,折射角就越小。全反射:当光线从光密介质射向光疏介质时候,折射角可能达到90度,此时没有光线折射,所有光线反射回光密介质,从而达到我们想要得效果。

2 钻石为什么这么昂贵?

3 什么样的钻石具有投资价值?

二 钻石的挑选

1.钻石得形状。

2 钻石的4C以及证书

3 4C和证书之外: go beyond the 4C。

三  钻石术语介绍

 

http://www.jewelry-secrets.com/Blog/do-diamonds-leak-light/

 

 

To be continued…

11.16.2015

Diversity jurisdiction does not extend to suit involving only alien parties despite U.S. permanent residence status

http://www.lexology.com/library/detail.aspx?g=89b0cc80-ee78-450e-9d41-ed16e88295d9

http://litigation.findlaw.com/filing-a-lawsuit/federal-or-state-court-subject-matter-jurisdiction.html

what is subject-matter jurisdictioN:

Click to access Miller.CivPro.Fall13%282%29.pdf

https://www.law.cornell.edu/wex/subject_matter_jurisdiction

Subject-matter jurisdiction examples: State courts, Federal courts, U.S. Supreme Court.

https://www.law.cornell.edu/wex/example/%5Bfield_short_title-raw%5D_16

Show on page(s):

1.  State trial courts have subject-matter jurisdiction over all cases except those which must be heard exclusively in other courts.  Paul files a tort case against Dennis in a state trial court.  There is no law which gives any court exclusive jurisdiction to hear this type of case.  Therefore, the state trial court has subject-matter jurisdiction over this case.

2.  Federal district courts are courts of limited jurisdiction.  They only have subject-matter jurisdiction if a claim arises under federal law, or if no plaintiff shares a state of citizenship with any defendant and the amount in controversy exceeds $75,000 (see diversity jurisdiction).  Richard thinks that Vincent has violated federal racketeering law, and wants to file a civil suit.  Richard and Vincent are both citizens of New York, but the case can still be tried in federal district court because the claim arises under federal law.  Alternatively, the case may be tried in state court because no law gives federal courts exclusive jurisdiction over this type of claim.

3.  The State of Arizona plans to sue the State of California for excessive air pollution amounting to a public nuisance.  Under 28 U.S.C. § 1251, the U.S. Supreme Court has exclusive jurisdiction over “all controversies between two or more States.”  This means that only the U.S. Supreme Court has subject-matter jurisdiction over this type of case.  Arizona can only sue California in the U.S. Supreme Court.  The state courts have no subject-matter jurisdiction over this type of case.

stocks investment

1. Options Basics: Puts And Calls

 http://www.forbes.com/2006/08/23/investools-options-ge-in_wh_0823investools_inl.html

Options are divided into two categories: calls and puts. Calls increase in value when the underlying security is going up, and they decrease in value when the underlying security declines in price. Puts increase in value when the underlying security is going down and decrease in value when it is going up. So depending on what you anticipate happening in the market, you can buy a call or a put and profit from that movement.

To understand why the value of calls and puts fluctuate when the market moves up and down, you need to understand what each type of option gives you the right to do once you have purchased it.   

Call Options

A call option gives you the right to buy a stock from the investor who sold you the call option at a specific price on or before a specified date. For instance, if you bought a 35 October call option on General Electric , the option would come with terms telling you that you could buy the stock for $35 (the strike price) any time before the third Friday in October (the expiration date). What this means is, if GE rises anywhere above $35 before the third Friday in October, you can buy the stock for less than its market value. Or if you don’t want to buy the stock yourself or exercise the option, you can sell your option to someone else for a profit.

The drawback is if GE never rises above $35, your option won’t be worth anything because nobody wants to buy an option that allows them to buy a stock for a higher price than they could get it for if they just went out into the open market and bought it.

Put Options

A put option gives you the right to sell a stock to the investor who sold you the put option at a specific price, on or before a specified date. For instance, if you bought a 25 October put option on Pfizer , the option would come with terms telling you that you could sell the stock for $25 (the strike price) any time before the third Friday in October (the expiration date). What this means is, if Pfizer falls anywhere below $25 before the third Friday in October, you can sell the stock for more than its market value. And if you don’t want to sell the stock yourself, you can sell your option to someone else for a profit.

Now, you have to keep in mind that to make money you will not have purchased a put option on a stock that you own (although this can be a legitimate hedging strategy). If you owned the stock, the gains you would make on the put option would be offset by the losses you would incur on the stock. Instead, you would buy a put on a stock you don’t own and then buy that stock right before you are ready to exercise the put. For instance, if you have purchased a put on Pfizer with a strike price of $25, and the stock dropped to $20, you could go out into the open market, buy the stock for $20 and turn around and sell it for $25, making a $5 profit.

The tricky part about options is that they expire. If you don’t sell or exercise your option before the expiration date, you will lose your entire investment. That’s a scary proposition, so you need to take care to always watch your expiration dates.

Options are no longer just for large institutional investors. You too can take advantage of the flexibility and leverage these wonderful trading tools offer.

 

2. http://www.mitbbs.com/article_t2/Stock/35727611.html 

重要决定!

开车去加州!

正式决定,暑假毕业了自驾去加州.  现在可以有空开始研究路线图了,计划旅行时间一个礼拜,平均每天可以开5-8个小时的车。

准备工作:

第一当然是锻炼身体,不然开那么长的车会累趴下。

第二,上路前换2个车胎,检查车子其他问题。预计花费300-400刀。

第三,出发前2个月有空多上上高速。

第三,买个微单用来拍照片。

第四,准备好音乐

第五,准备好必备品,比如药 (optional),洗浴用品

想到再写!

剑道感想(二)

周六去cleveland kendo association练习了6个小时,从下午3点到晚上9点,然后和大家一起去number one pho吃了晚饭,一群饥肠辘辘的剑友一等食物上来以后就安静的只剩下吃饭的声音了,而我居然成了桌子上第一个吃完的人。

今天练习又有几点收获。

1。今天居然学习了kata的前3个movement。一起练习的以色列交换生已经练习了4个月了好像以前也就看过别人练。所以感觉特别兴奋

2。今天还知道了右脚在站立的时候原来也需要微微抬起,这样就右脚就随时处于可以往前slide的状态,站在那里要有bounce的感觉。这是一个higher ranked 的sensei纠正的。左脚不需要抬起太高。

3。把剑往上挥的时候,是一个半圆,往上挥的角度是tip of the shinai顺着对方的men的角度,然后再收回至左手离额头一个拳头的距离。

4。注意men的声音要和men strike、左脚收回同时发生。

附kata 的英文介绍

http://www.eanet.com/norwalk/ref/kata.htm

Kata
Nihon kendo kata consists of predefined sets of attacking and defending movements, performed with metal or wooden swords (katana or bokken, respectively). In practicing kendo kata, one gains a better appreciation of handling and reacting to “real” swords, as opposed to shinai kendo.There are 7 long sword (tachi, or daito) forms, and 3 short sword (kodachi, or shoto) forms.

The following must be performed for shinsa (promotional examination) according to International Kendo Federation (FIK) regulations:

  • 1 kyu: tachi forms 1 – 3
  • 1 dan: tachi forms 1 – 5
  • 2 dan: all tachi forms (1 – 7)
  • 3 dan and above: all tachi forms (1 – 7) and all kodachi forms (8 – 10)

At Norwalk Dojo, kenshi must learn kata at least one level above the FIK regulations. 

Kamae
There are 5 basic kamae used in kendo kata, 6 if you count the two jodan forms separately. Unless otherwise specified, step forward to assume the kamae, the hands and tip of the sword are aligned with the centerline of the body, and the body faces straight forward. The back heel is always slightly raised.

  • chudan no kamae. Middle kamae, basic kamae with the tip pointing to the opponent’s throat.
  • migi-jodan no kamae. Overhead kamae, right foot forward, sword at 45degree angle, left hand one fist from the forehead.
  • hidari-jodan no kamae. Overhead kamae, left foot forward, sword at 45 degree angle, left hand one fist from the forehead. The left hand is positioned above the left eye, so the tip is slightly to the right, behind the head.
  • gedan no kamae. Lowered kamae, tip slightly lower than the opponent’s knee.
  • hasso no kamae. Similar in form to hidari-jodan, but the kamae is slightly above the right shoulder instead of overhead. The right hand is even with and about one fist away from the mouth, the left hand is aligned with the centerline of the body, sword at 45 degree angle.
  • waki gamae. Behind the body kamae. Step back with the right foot, and position the sword so that it angles down with the tip hidden from the opponent, with the left hand near the right hip. The body turns to the right.

 

Uchidachi and Shidachi Roles
tbd 

Rei-ho
tbd 

Tachi no Kata (Long Sword Forms)
The following list briefly summarizes the starting kamae and primary (“ya” / “to”) cuts for the uchidachi / shidachi roles. Click on the numbered link for a video clip of the kata.

  • 1 hidari-jodan / migi-jodan; men (through torso) / nuki-men
  • 2 chudan / chudan; kote / nuki-kote
  • 3 gedan / gedan; tsuki / tsuki
  • 4 hasso / waki; tsuki / men
  • 5 hidari-jodan / chudan; men / suriage-men
  • 6 chudan / gedan; kote / suriage-kote
  • 7 chudan / chudan; men (through torso) / do

 

Kodachi no Kata (Short Sword Forms)
  • 8 hidari-jodan / chudan; men / men
  • 9 gedan / chudan; men / men
  • 10 chudan / gedan; men (do) / tsuba

 

Kata tests
  • primary kamae: chudan, migi-jodan, hidari-jodan, gedan
  • tachi reiho, 5 steps back, 3 steps forward 
  • 1 ippon me
  • 2 nihon me
  • 3 sanbon me 
  • secondary kamae: hasso no kamae, wakigamae
  • 4 yonhon me
  • 5 gohon me 
  • 6 roppon me
  • 7 nanahon me 
  • kodachi no kamae: vs jodan, vs gedan, gedan
  • 8 kodachi ippon me
  • 9 kodachi nihon me
  • 10 kodachi sanbon me

剑道感想(一)

第一次去kendo club的practice是在3月8号,之后12, 19, 20, 23号各参加了一次。一共有5次了。学到现在有颇多感想。每次到了practice的日子,就非常的高兴,期待时间的到来。非常喜欢剑道里对于礼仪的严格要求,据说是因为旧时比武结果往往会有一死,所以对对手尊重也是对生命的尊重。也喜欢那种忽静忽动的典雅的感觉。如果说刚开始只是抱着好奇的态度去练习剑道,现在慢慢开始内心真正喜欢上了剑道.

现在我存在的几个最大的问题。

1。右手参与用力太多,导致挥剑时,往上挥和下挥路线都是弯曲的

2。左手不够稳,在练习左右平移的时候,shinai看着就离开中线了。中线在剑道中是非常重要的,中线守不好,非常容易被对手攻击。左手稳的一个关键是要左手臂和身体夹紧。

3。没有体会用身体出力,甚至前进有时候没有用左脚推动,而是右脚直接迈向前。丹田应该用力,这样才能保持身体直。身体不直非常容易被对手看出破绽,也不利于  快速移动。平时走路可以多体会丹田用力的感觉

4。剑挥上去的时候要注意保持45度角,tip of the shinai can not be lower than the shoulder. 如果不能做到这个,就说明手臂或者手腕动作做错了,会影响挥下时候的发力。

5。左手掌和中、食、小指的力量需要继续训练。

死了都没人知道吧

前天实验室一个今年来的新生师妹和我说,她感觉在美国这个地方,真的就像浮萍一样,有时候感觉死了也不会有人知道。当时我就心里一痛,这完全和我想的一样。当时我出于师兄的责任,安慰了一下师妹。

今天晚上睡不着。像黑夜一样深的寂寞又爬满了全身,像无孔不入的虫。脑袋里漫无目的的空转着,然后又想起了这句话。或许这其实和美国无关,只是当我们来到一个朋友更少亲人更少的地方的时候,这种感觉得到了放大而已。事实是,这个地球不会为任何一个人停止转动,可以预见的是如果你死去,周围绝大多数人生活也不会丝毫受到影响,他们只会停留片刻,,然后继续上路。你从小到大那样在乎身边的同学朋友们对你的看法,一直想着如何和他们打成一片,有时候也想着似乎如果没有你,他们的世界无法想像,你们的一个个所谓圈子怕是都要解散吧。可是,事实可能是,即使你死去,大多数人,还是像看路边的死狗一样,停留片刻,哀叹一声,和其他看客耳语一番,“它真可怜”,然后继续上路。

似乎人就是被造物主造的这样复杂。他从未离开过一个不断膨大的自我,却又无时无刻不在渴望着去接近旁人。他感到寂寞,却又固步自封。他自以为强大无比,却一个人在黑夜里写下这样悲伤的文字。

他在干嘛?

此时此刻,我看着自己在做的事情。不知道为什么感觉这么奇怪,好像自己的灵魂已经出窍,走出我的躯壳,然后反过来在看我的躯体在电脑前敲打着。这一刻,我做的事情有什么意义? 我调试一会程序,然后上网搜索一些解决方案,然后跑来写个心得文章,然后就突然灵魂出窍了,不知道”他“做这些是在为什么,为了怎样一个目标,会造成如何的影响。我也不知道”他“为什么此时此刻坐在这里,而不是其他地方,在更广大的世界里任何一个地方,比如荒山野岭,比如纽约繁华的街头,比如故乡的小路上。我不知道”他“到底是为了什么,在这一刻坐在了这个看上去很无聊的地方,他好像也就是机械的一样的坐着,”他“脑袋里到底在想些什么? 这种感觉是这样的诡异,就像我们经常看着一个很熟悉的常用汉字,就突然觉得陌生起来,不知道这个字到底有没有写对一样,然后就一直看到脑袋疼不愿去看为止。

who I will be in five years?

This is a popular behavior question in interviews. But recently I have been asking myself this question a lot. every time I need to kill my time, I will start thinking about this question. I definitely want to stay employed after five years. but what direction do I want my career be heading towards at that time? Or, what do I want most in my career?

Honestly, never really thought about this seriously before. Most of the time, I just follow the main stream and here I am now. lucky enough, I am in a not bad position at this time. After 1 year and a half confusing time in PH.D. program I decided to quit the PH.D. and get a master degree only. Now, there are 6 more months to get my master degree in computer science for which I didn’t pay a penny for, instead I actually made some bucks out of it; And I have one job offer in California at hand long before graduation. Yet when I look back, I realize how much different this is from what I pictured myself when I was a senior in college preparing for GRE and applying to US schools.

At the end of my college, I got two master offer with full support, and several other PHD offers. and I chose PHD offer. I still remember one school who gave me a master offer with fellowship, Fordham University. The professor who gave an interview to me was suggesting I should take the master offer for now, and later on I can decide if I still want to go PH.D. That’s the same suggestions I got from some other people I met on Internet. However, at that time, I thought I am determined to go for PH.D. if anyhow I will go to PH.D., why would I bother to get a master at first? Isn’t that a waste of time?

Now, I can’t help thinking about that decision I have made. It’s hard to see what’s gonna happen if a different road was taken. but it’s apparently these kind of decisions do have a big impact of our lives.

so I feel so confused about the future. it’s uncontrollable and can’t be planned. some one will tell me, “that’s why you need to follow your heart, so you will feel happy at least”. I would agree with this. but unfortunately I just cant tell what my heart is telling me to do. Even I hear something in my heart, I will think is this good? am I just finding excuses for not choosing the difficult path which more people like better? or do I really know that’s what I want? Or I will ask myself, is this difficult path worth it?

I will fall back, flinch, retreat. and so I don’t get to test what’s my heart telling me to do.

失眠后的怀旧

今天晚上又睡了一觉 结果就是通宵失眠。

无奈,起来刷FACEBOOK。FACEBOOK上相片不多,但是却能涵盖来美2年的基本轨迹。看着一张张相片,想起很多快乐的时光,很多很少再联系的朋友,看着当年稚嫩的脸,看着相片里自己的笑容,自己都会感受到那种开心,感慨万千。2年过去了,变化得不只是外表,周围的朋友,更多的还是自己的心境。还记得第1年的冬天,那时候没有车,确从不觉得冬天很难过。现在还没有到冬天,想起来都会觉得很愁。那时候心似乎至少更加简单,但记忆却其实很模糊,以至于有时候都怀疑是否那段时间确实曾经在我身上流过。路过小意大利的时候总是会有一种怀旧的感觉,想起曾经在COLTMAN街上那栋旧旧的房子里度过的第1年的点滴,又会发现,甚至某天一个人走路上学回家的情景都还记得。