Search engine mathematics workshop presented 2011

2. Our goals today ...
• Discover the biggest mistakes made by most
Internet users
• Talk about the differences between directories
and search engines (and when to use each.)
• Learn some basic Google searching
techniques.

3. The Biggest Mistake
Typing URLs in the wrong box

5. EFSGG
EFSGG

7. The Second Biggest Mistake
Using the wrong tool at the
wrong time

8. Three questions
• Where would you find the telephone
number or address of the El Gomuhireya
theatre?
• Where you would find the definition of
the word “leadership?”
• Where would you find the name of the
Mouse Inventor?

10. Directories
• Usually human-compiled guides to the
web, where sites are organized by category
• Major directories:
– MSN
– Yahoo
– Netscape ODP

11. What directories are good for
• “What is the Web page address for some company,
organization, or entity?”
• (or “who makes product X?”)
• “Where can I find a list of Web pages that focus on a
particular, „universal‟ topic?”
• In other words, directories are GREAT for “telephone
book” searches.

12. Search Engine
• The three parts of a search engine:
– the spider
• A spider (also called a "crawler" or a "bot") that goes to every
page or representative pages on every Web site that wants to be
searchable and reads it, using hypertext links on each page to
discover and read a site's other pages.

13. Search Engine
• The three parts of a search engine:
– the catalog
• A program that creates a huge index (sometimes
called a "catalog") from the pages that have been
read.

14. Search Engine
• The three parts of a search engine:
– the front end
• A program that receives your search request,
compares it to the entries in the index, and returns
results to you.

15. Directories v Search Engines
• Directories are human-compiled and have a
small number of pages in their databases
(usually in the low millions)
• Search engines are machine-compiled and
have a HUGE number of pages in their
databases (usually in the hundreds of millions
or even the billions)

16. The Search Engine five rules
1. Be specific ... because if you aren‟t specific,
you‟ll end up with a bunch of garbage!
2. Use quotes to search for phrases.
3. Use the + sign to require.
4. Use the - sign to exclude.
5. Combine symbols as often as possible
(see rule #1).

17. Search engine rule #1
Be specific ... because if you aren‟t
specific, you‟ll end up with a bunch of
garbage!

18. Search engine rule #2
Use quotes to search for phrases.
“pirates of the caribbean”

19. Search engine rule #3
Use the + sign to
require.
“pirates of the caribbean” +disney

20. Search engine rule #4
Use the - sign to
exclude.
“pirates of the caribbean” -video

21. Search engine rule #5
Combine symbols as often as possible
(see rule #1).
“pirates of the caribbean” +disney -video

23. Advanced Operators
Query modifiers
•
•
•
•
•
filetype:
intitle:
inurl:
site:
synonyms
Alternative query
•
•
•
•
cache:
link:
related:
define:

24. A sample Google search
+inurl:apollo +moon
–”john young” +site:nasa.gov
Now, Can you guess the result? ?

27. • Dxcfgbkml,;.
• Azsxdcgbhjmk
•