1. s1160150 Toru Nakashima
s1160151 Hiroshi Nagashima
s1160160 Kensuke Nishimura
s1160166 Shigeyuki Hashikawa

2. Summary
First, crawler or spider get document and URLs
and send them indexing software.
Second, software receives them and indexes
their information.
Next, type words on the web page.
Finally, database show the results as pages, or
files.

3. Search Engines
 Google
 YAHOO! JAPAN
 goo
 Wikipedia

4. Crawler or Spider
 Have set of rules guide about gathering
documents.
 Taking from several seconds to many minutes
to find owing to the size of the sites.
 Take software agents get documents and
URLs and send them to indexing software as
discovering them.

5. Indexing Software
 Receive documents and URLs from agent.
 Extract information of them and index.
 Index title and headings and subheadings.
 The kind of index is determined owing to the
type of searching.

6. Searching Database
 Return results in HTML pages.
 Weigh relationship document and search.
 Look for URLs, document sentences, and the
title of documents, and so on.

7. Problems
 Encouragement to stalker action
 Back sites about school
 Assistance to oppression about a heated
discussion
 Slander

8. Reference
 Wikipedia

9. END
Thank you for watching.