EMBA的小眼睛

自從Google取消補充材料標記后，關于補充材料的討論沉積下來了。Google只是取消了在搜索結果中標注補充材料，補充材料以及補充索引還是存在的，只不過我們不能直接看出來了。

在經過一段時間的思考后，今天談談對補充材料的更進一步熟悉。

以前我曾經覺得補充材料和補充索引的引入，很有可能是因為想節省帶寬。但Google最近表明，補充索引中的網頁抓取和更新頻率加快，補充索引中的網頁出現在搜索結果中的機會也提高，說明不是為了節省帶寬。

結合一些其他方面的觀察，我現在覺得補充索引是為了提高搜索速度。在搜索某些要害詞時，Google可能只搜索主索引，忽略補充索引里的結果，這樣能大大提高速度。搜索所有要害詞都在抓取的所有頁面索引中尋找結果的話，那計算量必然使返回結果的速度減慢。

挑出一部分權重高的網頁進入主索引，把其他權重低的歸入補充索引，可以大大提高計算速度。有的時候主索引中結果不足，才去補充索引中尋找結果。至于在什么情況下才會觸發去補充索引中尋找網頁不得而知。

Avoiding the false proxy trap

If we define anxiety as experiencing failure in advance, we can also understand its antonym, anticipation.

When you work with anticipation, you will highlight the highs. You'll double down on the things that will delight and push yourself even harder to be bold and to create your version of art. If this is going to work, might as well build something that's going to be truly worth building.

If you work with anxiety, on the other hand, you'll be covering the possible lost bets, you'll be insuring against disaster and most of all, building deniability into everything you do. When you work under the cloud of anxiety, the best strategy is to play it safe, because if (when!) it fails, you'll be blameless.

Not only is it more fun to work with anticipation, it's often a self-fulfilling point of view.
 http://sethgodin.typepad.com/seths_blog/

The biggest, best-funded non profits have an obligation to be leaders in innovation, but sometimes they hesitate.

One reason: "We're doing important work. Our funders count on us to be reasonable and cautious and proven, because the work we're doing is too important to risk failure."

One alternative: "We're doing important work. Our funders count on us to be daring and bold and brave, because the work we're doing is too important to play it safe."

The thing about most cause/welfare non-profits is that they haven't figured out how to solve the problem they're working on (yet). Yes, they are often offer effective aid, or a palliative. But no, too many don't have a method for getting at the root cause of the problem and creating permanent change. That's because it's hard (incredibly hard) to solve these problems.

The magic of their status is that no one is expecting a check back, or a quarterly dividend. They're expecting a new, insightful method that will solve the problem once and for all.

鄒景平/總裁學苑專欄作家

　很多人對大規模網路公開教學(MOOC)能持續多久，感到懷疑？這種只靠創投資金支撐的模式，真的有前景嗎？他們也指出MOOC發展過程中，顯而易見的四大障礙，那就是收入來源，證書的真偽與效力，課程完成率和學生身份驗證。

　其實，我從這半年參與MOOC學習的活動，以及在網上看到的新聞，也發現MOOC創業者所作出的突破和努力，他們打破固有的僵化思維，逐步化解這些障礙。

　先從課程完成率來看，它跟課程的難易程度相關，若是不需使用軟體程式或提交複雜報告的，課程完成率就比較高，例如我上的「網際網路歷史、技術與安全(Internet history、technology and security)」，老師Charles Severace說，註冊這門課的人數有45572人，考試成績通過標準而拿到證書的有4595人。

　換言之，拿到證書的比率雖然是10%，但只教一次就約有四千六百人拿到證書，相比之下，Severace教授今年秋季班的面對面課程，學生只有152人。他所任教的密西根大學，每年的大學畢業生也只有六千六百人左右。