Search Yahoo! With Boolean Operators

spectacularscarecrowΤεχνίτη Νοημοσύνη και Ρομποτική

17 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

62 εμφανίσεις

Search Yahoo! With Boolean
Operators

AND, OR, (), “”, NOT, Domain:

Search Engine Coverage
Comparison
-

I


Common Search Engines


Misconceptions


Search Engines index all available content on
the web


They all work in roughly the same way and they
all deliver similar results



If this is true


what is the likelihood that a

site will show up on the first page (top 10)

of results of all 4 major search providers?

Search Engine Coverage
Comparison
-

2


1.1 %



The study looked at search results from

12,570 random queries on Ask, Google,

MSN search and Yahoo which suggests

that each of the four major search engines

has a unique ranking approach of findings

not duplicated by the other search

engines.


Info from “
A study of Results Overlap and Uniqueness Among Major Web Search
Engines
” by Spink, Jansen, Blakely, and Koshman published in Information
jProcessing and Management (2006)

Search Engine Coverage
Comparison
-

3


http://ranking.thumbshots.com/


Searched “human computer
interaction” in Google vs. Yahoo.



Results


Dots=web sites


Blue Dots=web sites both engines have
in common


Search Engine Features Chart


http://www.searchengineshowdown.c
om/features/



Search engines provide different
search techniques, different limits,
and etc.

Why Boolean Operators?


Limitations of natural language
process (NLP), i.e, “who is John
Kerry” does not always work


Powerful

“” (quotations)


Human computer interaction
-
>


Without any Boolean operator



"
human computer interaction
"

-
>



Note “Server Farm”


clustered
servers, ie. Google consists of
450,000 servers

AND and adding more keywords


“human computer interaction”

AND

voice recognition

-
>


Note: Boolean operators are in upper
case



“human computer interaction”

AND

voice recognition
AND

blind
-
>


OR, (), adding more keywords


“human computer interaction”

AND

(
voice
OR

speech
)

AND recognition AND blind
-
>



NOTE: no need to enclose a single word with quotation
mark (“ ”)



“human computer interaction”

AND

(voice
OR speech) AND recognition AND
(
blind
OR


visually impaired”
)
-
>

More Keywords


Combining keywords with special keywords below






“human computer interaction”

AND
(voice OR speech) AND recognition
AND (blind OR “
visually impaired”
)
AND (research OR development)

-
>

research

development

analysis

methodology

reviews

models

models

illustrations

benefits

advantages

disadvantages

liabilities

Domain: and NOT (
-
)


“human computer interaction”

AND (voice OR speech) AND
recognition AND (blind OR “
visually impaired”
)

AND
domain:com

-
>



“human computer interaction”

AND (voice OR speech) AND
recognition AND (blind OR “
visually impaired”
)

AND

domain:
edu

-
>


(other domains, .com, .org, .gov, and .edu)




“human computer interaction”

AND (voice OR speech) AND
recognition AND (blind OR “
visually impaired”
)

AND
domain:org


wikipedia.org

-
>



“human computer interaction”

AND (voice OR speech) AND
recognition AND (blind OR “
visually impaired”
)

AND
domain:org
NOT wikipedia.org

More complex example


“human computer interaction”

AND
(voice OR speech) AND recognition
AND (blind OR “
visually impaired”
)

AND
(domain:org OR domain:edu)

-
>



And many more


Default Boolean Connectors


(“computer mediated reality" OR
“augmented reality”) (Medical OR
Surgical) (benefits OR advantages)
-
>



(“computer mediated reality" OR
“augmented reality”) AND (Medical OR
Surgical) AND (benefits OR advantages)
-
>



NOTE: Yahoo’s default Boolean connector is “AND”