Homework 4

1. when you lost your phone in somewhere, you can track the location by wifi and get it back.
2. use wifi to send instant information, so the cell phone can be a tour giude for the newbies.
3. Shopping mall giude: locate the shop of clothes, shoes and gifts.
4. application in indoor tracking : all you can imagine

Homework 3

Read the article about Google Adsense
and watch the video of the talk given by the Adsense developer.
Summarize the talk and the things your learn.

Search is easy, but how to find the best ad for advertiser requires more artificial intelligence.
Let computer know the human language is much diffcult part.

revenue
CPC(cost per click)
CPM(cost per Mille )(thousand impression)
CPR(click through rate) (click + impression)
eCPM=CPC*CTR

"If I'd ask my customers what they wanted, I would've had to go looking for faster horses"
-->sometimes customers don't know what they want!

Vickery Auction
The highest bidder wins, but paid for the second highest price.
---> close to true value for the bidder

How do u estimate CTR for not-yet-shown ads?
base CTR

contextual ads

challenge is the real time updates.

click fraud

natrual language processing

similarity of short text

tradtional retrieval similarity

Homework 2

1. 安裝 PageRank , 然後使用 PageRank 量測以下網站的 PageRank (0~10分)
美國 FirstGov=>10
歐盟 http://europa.eu.int/index_en.htm=>8
英國 Direct Gov=>8
日本 首相與內閣入口網=>7
台灣 MyeGov=>7
新加坡 SingGov=>7
澳洲 Australia Government=>7
德國聯邦政府=>6
中國 中央政府門戶網站=>7
韓國 http://Korea.go.kr=>2 (amazing)

2. Moodgrapher plots the mood levels reported by LiveJournal users in their posts.

* Use Moodgrapher to compare the "happy" mood level versus "sad" during the period from 9/1/2006~9/30/2006.



I wonder why Sep. 4th reaches the peak of the graph.I GUESS this is the reason "Deaths:2006/9/4 - Steve Irwin - Australian naturalist and TV personality. (b. 1962)". Steve is one of my favorites on TV shows.

* Can we justify that people drink more during the weekends?


According to the calender, one of the peaks of the wave is Sunday(9/17), the next one is Saturday(9/16). For a reasonable guess, weekends are the days for people to relax ,and of course, to get drunk.

3. Read JONATHAN SCHWARTZ, Sun CTO's Blog. Do you think his blog is authentic, honest, and authoratative? Why?

authentic,authoratative,honest:

This blog is written by CEO of Sun Microsystems,the articles he wrote can convince every customer that is the truth. The translator of several major languages may be a great helper to those who are not firmiliar with the English.