LIS 2670 week7 Access in digital libraries part 1 reading notes

LESK chapter 4.

David Hawking , Web Search Engines: Part 1 and Part 2 IEEE Computer, June 2006. http://www.computer.org/portal/site/computer/menuitem.5d61c1d591162e4b0ef1bd108bcd45f3/index.jsp?&pName=computer_level1_article&TheCat=1055&path=computer/homepage/0606&file=thingswork.xml&xsl=article.xsl&;

M. Henzinger et al. challenges in Web Search Engines. ACM SIGIR 2002. http://portal.acm.org/citation.cfm?coll=GUIDE&dl=GUIDE&id=792553

I do not find the readings of the first and the second one. I will put my reading notes when I find the articles. I have searched the second article in IEEE database, but I do not find this paper.

Challenges in web search engines:
In this paper, the author points out several challenges that faced by current web search engines. I do think spam is anywhere in today's search engines. And the precision rate is not very high. When we do some searches in search engine, only top -ranked results can meet my needs. The other results are more like trash. Now, we are in a sea of information and advertisement. Relevance is very important in current search engines.