Kindle PaperWhite 电源键失灵/无法唤醒/无法点亮屏幕

今天园主的kindle抽风了,除了连上电脑以外,一律无法唤醒(没变砖)。首先猜测电源键坏了,然后上网搜...有人云需要80元去电脑城修,呜啊!这个pw才入手不到一年啊!果断先拆机看看什么情况(好吧,这已经是我第三个kindle了,前两个的尸体都被我拆过,然后彻底的寿终正寝了)。我心里边拆边默念,这一定是我拆的最后一个kindle...

Pw比以前的kindle好拆,前面的壳纯属装饰,硬粘上去的,用瑞士军刀最薄的刀片撬开一角就好了。然后一圈螺丝拧下来,嗯,顺利地脱掉后盖。咦,怎么没问题啊,没有零件掉下来啊,怎么触电源触板还是不能唤醒。正当我打算拆电池的时候,又开始网上搜,这次居然搜到了kindle paperwhite的唤醒套。咦,这货居然可以有唤醒套?然后果断去拿ipad唤醒皮套试试。依然无效。

垂头丧气的,继续搜。有人再秀如何DIY皮套,看了一眼原理大概是磁铁感应。还是不死心的去测试,发现ipad的皮套可以唤醒ipad,应该是有磁性啊。难道是不够强?于是满屋子开始找磁铁。一开始想找个废耳机的磁铁,后来睁眼一看,这不是还有几个冰箱贴嘛!果断拿过来试试。一、二、三!绕了一圈,kindle居然亮了!然后电源键恢复如初!

这是什么原理....想不通也懒得再去想了,大家类似的情况可以先找个冰箱贴试试。大概是白天kindle和ipad、笔记本、耳机之类裸奔混在一起,有磁性干扰,触发了什么机制?后面强磁铁干扰回去就好了?噗。


英文写作笔记(二):避免废话太多

依旧从BerkeleyX: ColWri2.2x Principles of Written English 抄过来的。我真的对这门课是相见恨晚!呜呜,我写英文各种罗嗦(楼下群众:你中文更罗嗦好不好?你看落园多少废话?)

ps 中间有段讲写作语气的我没抄过来,这个感觉和语言就无关了,更多是用词的精准...

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what causes wordiness?

Wordiness is using more words than you need to in order to write what you mean.  Everyone has a tendency to be too wordy at times. Some of the causes of this wordiness are:

- Trying to sound too formal or academic. Unfortunately, in academic writing, there are a lot of examples of wordy writing. This doesn't mean you have to model your writing on bad examples. Your readers will always appreciate if you state your ideas clearly, and using no more words than needed.

- Not knowing more precise vocabulary.  For example, saying, She ran quickly to the store can be made somewhat less wordy, and more precise, by saying: She raced to the store (race=run quickly). Finding the right vocabulary can help you cut down the number of words you use. Every reduction helps, even if it's only a word or two.

- Using too many unnecessary and vague modifiers.  Typically, modifiers like really, very, quite, and similar words add no meaning to your writing. If you need to modify a word, find precise modifiers. For example, instead of There's a really tall building near my house, write: There's a 50-story building near my house. 

- Using too many prepositional phrases or possessives. These types of phrases can add length to your sentences, often unnecessarily. So, instead of The car belonging to Mr. Wang is in the garage [10 words], write: Mr. Wang's car is in the garage [7 words].

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Writing less wordy prose

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Read more


英文写作笔记(一):常见写作方向性错误

下面是抄过来的...来自:BerkeleyX: ColWri2.2x Principles of Written English。读完觉得我的英文写作真的是没受过正规教育...哎。

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There are two main sources of error in diction:

1. Choosing the wrong word. This can happen because of confusion between homonyms (words that sound alike but are spelled differently), or because the meaning of the word isn't fully understood.

2. Choosing colloquial, or less formal spoken language when standard or more formal language is called for (or vice versa). In academic writing, formal diction is generally expected.

Here are 21 common errors made in writing formal diction. How many of these usage errors have you made?

1. A lot/lots of

Colloquial: Diana likes her apartment a lot.
Formal: Diana likes her apartment very much.

Colloquial: There are lots of books in our library.
Formal: There are many books in our library.

2. Among/between
(Tip: Among involves more than two; between involves only two)

Colloquial: Discussions between our group members were often very lively.

Discussions Formal: Discussions among our group members were often very lively.

3. Around/ about
(Tip:  Don't use around to indicate time, distance, or other quantity.)

Colloquial: The class usually begins around nine.
Formal: The class usually begins at about nine.

4. Badly
(Tip: "Badly" is not a substitute for "very much.")

Colloquial: The team wanted to win really badly.
Formal: The team wanted desperately to win.

5. Based off of

Colloquial: Based off of that information,  we can move ahead with the plan.
Formal: Based on that information, we can move ahead with the plan.

6. Because
(Tip: Don't use "because" after " reason.")

Colloquial: The reason for our flight delay is because of bad weather.
Formal: The reason for our flight delay is the bad weather.

7. A bunch/bunches
(Tip: Use bunch or bunches only for things that are bound or grow together, like bananas and grapes; it is not used for other countable nouns.)

Colloquial: A bunch of us are going to the movies tonight.
Formal: A group of us are going to the movies tonight.
Formal: There are three bunches of bananas on the counter.

8. Each other/one other
(Tip: Each other refers to two, one another refers to more than two.)

Colloquial: Everyone at the party wished each other a happy new year.
Formal: Everyone at the party wished one another a happy new year.
Formal: My sister and I wished each other a happy new year.

9. Guys

Colloquial: I hope you guys can join me at the restaurant.
Formal: I hope all of you can join me at the restaurant.

10. In / Into
(Tip:  "In" means "within" or "inside", while "into" refers to the motion of going from outside to inside.)

Colloquial: Bill went in the bus station to buy a ticket.
Formal: Bill went into the bus station to buy a ticket.

11. Infer/imply
(Tip: To infer is an act of thinking, to imply is an act of saying something.)

Incorrect:  I saw your memo about a noon meeting. Are you inferring that we should have lunch together?
Correct: I saw your memo about a noon meeting. Are you implying that we should have lunch together?

12. It's/its

 

Incorrect: The committee has reached it's goals this year.
Correct: The committee has reached its goals this year.

13. Kind of / sort of
(Tip: Don't use "kind of" or "sort of" when you mean "very" , "rather," or "somewhat." )

Colloquial: Jim was sort of angry when he learned we went to the park without him.
Formal: Jim was somewhat upset when he learned we went to the park without him.

14. Less than/fewer than
(Tip: Use less than only with uncountable nouns.)

Colloquial: There are less people in the store today than yesterday.
Formal: There are fewer people in the store today than yesterday.

15. Like / as
(Tip: Use "as" when comparing actions, "like" when comparing things.)

Colloquial: Alan wants to write a new essay, just like Sarah does.
Formal: Alan wants to write a new essay just as Sarah does.

16. Like / maybe
(Tip: Avoid using "like" and "maybe" when estimating; use "approximately", "perhaps" or "about" instead.)

Colloquial: There were like thirty people at my birthday party.
Formal: There were approximately thirty people at my birthday party.

17. Meantime

Colloquial: Meantime, the rain continued to pour.
Formal: In the meantime, the rain continued to pour.
Formal: Meanwhile, the rain continued to pour.

18. On account of

Colloquial: On the account of the weather, our plane was late.
Formal: Because of the weather, our plane was late.

19. Plenty

Colloquial: It has been plenty warm all week.
Formal: It has been very warm all week.

20. So
(Tip: Don't use "so" as a synonym for "therefore".)

Colloquial: Dmitry knew that I missed class, so he shared his notes.
Formal: Dmitry knew that I missed class; therefore, he shared his notes.

Colloquial: This week's homework is so difficult.
Formal: This week's homework is very difficult.

21. They're/their/there

 

Incorrect: Do you know if their going to the party?
Correct: Do you know if they're going to the party?

Incorrect: What is there address?
Correct: What is their address?


Constitutional Law by Yale 听课笔记(三)

宪法修正过程。

第一次大的修正称之为Bill of Rights, 1791年通过。后面的修正案大都集中在某一段时间。

Bill of Rights 修正案1-12 十八世纪末十九世纪初

Civil War Amendments/Reconstruction Amendments 修正案13-15 十九世纪中期,civil war后

The Progressive Era Amendments 修正案16-18  二十世纪初

详细的列表在这里:http://en.wikipedia.org/wiki/List_of_amendments_to_the_United_States_Constitution

Bill of Rights主要的诉求是:

The Bill of Rights enumerates freedoms not explicitly indicated in the main body of the Constitution, such as freedom of religion, freedom of speech, a free press, and free assembly; the right to keep and bear arms; freedom from unreasonable search and seizure, security in personal effects, and freedom from warrants issued without probable cause; indictment by a grand jury for any capital or "infamous crime"; guarantee of a speedy, public trial with an impartial jury; and prohibition of double jeopardy. In addition, the Bill of Rights reserves for the people any rights not specifically mentioned in the Constitution and reserves all powers not specifically granted to the federal government to the people or the States.

Civil War Amendments主要是告别奴隶制度:

Their proponents saw them as transforming the United States from a country that was (in Abraham Lincoln's words) "half slave and half free" to one in which the constitutionally guaranteed "blessings of liberty" would be extended to the entire populace, including the former slaves and their descendants.

Progressive Era Amendments更多是现代化的标志:

The Sixteenth Amendment gave the federal government the power to lay and collect an income tax regardless of the source of that income.

The Seventeenth Amendment provided for the direct election of Senators by the people rather than by the state legislatures as the original Constitution called for.

The Eighteenth Amendment prohibited the import, export, transport, manufacture or sale of intoxicating beverages.

The Nineteenth Amendment gave women the right to vote.

最有趣的就是妇女投票权了。毕竟是需要男人们投票来决定妇女有权投票。一开始是从稀缺妇女的 Wyoming Territory州开始,然后扩展到全国。

最后的二战后的修正则主要是一些对于民主的更深入理解,比如总统任期的限制。


最新的一些经济学研究趋势...

今天闲着无聊抓了一下NBER最近一年的working paper数据看看。众所周知,econ现在发表周期越来越长,一两年都算少的,三五年也挺常见的。虽然跟跟AER什么的也是个比较好的指向,但多少还是“旧”了一点。

NBER覆盖的研究范围还是蛮广的,大部分发表的paper都能在这里找到working paper版本,所以一时没想到更好的抓数据的来源:

Aging(AG)
Asset Pricing(AP)
Children(CH)
Corporate Finance(CF)
Development Economics(DEV)
Development of the American Economy(DAE)
Economics of Education(ED)
Economic Fluctuations and Growth(EFG)
Environmental and Energy Economics (EEE)
Health Care(HC)
Health Economics(HE)
Industrial Organization(IO)
International Finance and Macroeconomics(IFM)
International Trade and Investment(ITI)
Labor Studies(LS)
Law and Economics(LE)
Monetary Economics(ME)
Political Economy(POL)
Productivity, Innovation, and Entrepreneurship Program(PR)
Public Economics(PE)

抓了一番之后,基本关键词热度如下。一些太没有意义的我就调透明了。(个人很讨厌word cloud这种东西,所以还是选择了bar chart)

[3/19更新] 和Bing里面的key words match了一下。貌似信息多了一些。

key_word

虽然数目不代表质量,但至少能看出来有多少人在某个领域耕耘。最突出的就是health这里了,很高(钱很多)。然后还有很多研究trade和growth的。然后risk和finance好像也蛮多的,crisis好像也挺多。Labor和IO一直也是热热的。研究方法上,随机试验还是最亮的。

没有进一步分析那些作者在高产,下次搞个“抱大腿”趋势好了。

代码在这里:

最后更新的部分代码。效率偏低,见谅。