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An Introduction to Web Retrieval
Published on Sep 20, 20116901 Views
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Chapter list
An Introduction to Web Retrieval00:00
Contents00:34
(1) The Web01:36
Internet and the Web Today01:37
Different Views on Data02:05
The Web03:56
The Different Facets of the Web06:09
The Structure of the Web10:19
Structure Macro Dynamics12:59
Structure Micro Dynamics13:42
Size Evolution15:28
Mirror of the Society16:09
Exports/Imports vs. Domain Links17:38
What is in the Web?18:00
Content and Metadata trends19:11
The Wisdom of Crowds (1)20:40
Tags / jaguar21:48
Flickr: Geo-tagged pictures22:45
The Wisdom of Crowds (2)25:33
The Long Tail26:03
Heavy tail of user interests (1)26:35
Heavy tail of user interests (2)27:37
Why the heavy tail matters28:15
Advertising28:58
Two Main Types29:14
What is in the Web? (1)30:44
What is in the Web? (2)30:54
Fight Spam31:17
(2) Web Search32:17
The evolution of commercial web search engines32:34
Web Search today33:30
The classic search model34:46
Classic IR Goal35:13
Web Search (1)36:00
Web Search (2)37:00
Main techniques37:34
Main challenges38:14
WR Logical Architecture39:29
Inverted Index41:20
A key goal41:25
Cache hierarchies are used to improve throughput42:18
Cache policies are tailored to user behavior43:43
Scaling Up44:29
A Typical Web Search Engine47:45
The engine is divided into a collection of services48:13
Document Partitioning49:17
Term Partitioning50:07
Index Partitioning: Comparison50:39
Index Partitioning: Practice53:04
Algorithmic Challenges53:35
Search rectangle57:13
SERP – basic layout58:06
Web Search Queries59:19
User Needs59:35
Query Distribution01:00:36
Queries and text (1)01:01:27
Queries and text (2)01:02:25
Queries and text (3)01:03:44
Other implicit signals01:05:45
Evolution of behavior01:06:30
"When you [...] don’t find what you are looking for ...."01:06:55
Same question over time01:07:17
Typical Session01:10:48
User Modeling01:11:22
Web IR Model01:11:53
(3) Ranking01:12:18
Link analysis01:18:46
Social sciences and bibliometry01:18:56
Citation Analysis01:19:19
Prestige01:19:26
Centrality01:19:43
Co-citation01:19:58
The Web as a Directed Graph01:20:22
Indexing anchor text01:21:56
Link Ranking01:22:44
PageRank (1)01:23:46
PageRank (2)01:25:21
PageRank variants and enchancements01:25:42
HITS (1)01:26:10
HITS algorithm01:26:53
HITS (2)01:27:41
Discussion01:27:44
Ranking in Practice01:29:00
Main Considerations01:30:26
Features: Wisdom of Crowds01:30:55
Learning to Rank: Content Features (1)01:31:24
Learning to Rank: Content Features (2)01:31:32
Quality Evaluation01:31:35