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SEARCHING THE WEB

TIPS and TECHNIQUES

Thursday, December 06, 2012 Prepared by Tania Azadi

Content

1. An introduction to TUMS Digital Library

2. What is a web directory?

3. What is a search engine?

4. Search strategies

5. A closer look at the EBSCO database

6. A closer look at the Primal Pictures Interactive Anatomy

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Searching The Web Workshop: Tips & Techniques

AN INTRODUCTION TO

TUMS DIGITAL

LIBRARY

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1

TUMS Digital Library

How to get to the Digital Library

Use this URL: http://www.diglib.tums.ac.ir

OR

Use the links

Introducing digital library tools

Federated search

TUMS e-journals

TUMS e-books

Off-campus access

English databases

Persian databases

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http://www.diglib.tums.ac.ir/

WEB DIRECTORIES

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What Is A Web Directory?

A web directory is not a search engine

Does not display lists of web pages based on keywords

Instead, it lists web sites by category and subcategory

Most of them are general in scope (Yahoo! Directory and the Open Directory Project (ODP))

Some focus on restricted regions, single languages, or specialist sectors (Shopping Directory)

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http://www.webliminal.com/search/search-web04.html

http://dir.yahoo.com/

http://www.dmoz.org/




A Comparison

Advantages

Directories contain fewer resources than search engine databases.

Many directories rate, annotate, or categorize chosen resources.

Directories increase the probability of retrieving relevant results.

Disadvantages

Arbitrary hierarchical arrangements.

Infrequent updates.

Subjectivity of rating and annotating resources

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Web Directory

Various features in listing:

Free submission

Reciprocal link

No reciprocal link

Paid submission

No follow

Featured listing

Bid for position

Affiliate links

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Web Directory

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Top Free Directories List

1 DMOZ

2 ExactSeek

3 SoMuch.com

4 Web World Directory

5 MasterMOZ

6 Virtual Library

7 SMSWeb

8 BUBL

9 Dmegs

10 Jayde

Top Paid Directories List

1 Yahoo! Directory

2 BOTW Directory

3 Business.com

4 Directory Journal

5 JoeAnt

6 Dirbull

7 Webotopia

8 Aviva Web Directory

9 01 Web Directory

10 Alive Directory

TOP Article Directories List

1 EzineArticles

2 GoArticles

3 Articlesbase

4 Buzzlesubmit

5 Article Dashboard

6 Helium

7 ArticleSnatch

8 Article Alley

9 Amazines

10 SearchWarp

ARCHITECTURE OF A

SEARCH ENGINE

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http://infolab.stanford.edu/~backrub/google.html

What Is A Search Engine?

Search engines are programs

Search documents for specified keywords

Returns a list of the documents where the keywords were found

Systems like Google, Bing and Yahoo!

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3 Main Parts Of A Search Engine

The spider, also called the crawler

The index, sometimes called the catalog

The search engine software

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The Spider

Also called the crawler

Visits A web page, reads it, and then follows links to other pages within

the site. This is what it means when someone refers to A site being

"spidered" or "crawled"

Returns to the site on A regular basis, such as every month or two, to

look for changes

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The Index

Sometimes called the catalog

Everything the spider finds goes into the second part of the search engine, the index

Is like a giant book containing a copy of every web page that the spider finds

If a web page changes, then this book is updated with new information

Sometimes it can take a while for new pages or changes that the spider finds to be

added to the index. Thus, a web page may have been "spidered" but not yet

"indexed." Until it is indexed -- added to the index -- it is not available to those

searching with the search engine

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The Search Engine Software

The third part of a search engine

Program that sifts through the millions of pages recorded in the index

To find matches to a search

And rank them in order of what it believes is most relevant

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A Simple Infrastructure Of A Search Engine

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SEARCH STRATEGIES

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Search Strategies Include:

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Search Features Include:

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Boolean operators

Truncation

Proximity operators

Wildcards

And so forth..

Boolean Operators

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AND

AND

OR

NOT

Boolean Operators

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AND

OR

NOT

OR

Boolean Operators

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AND

OR

NOT

N0T

Phrase Searching

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Search for documents containing an exact sentence or phrase

Find only that phrase and not every document where the words appear separately

Using (‘’)

What`s the difference between AND and PHRASE SERACH?

Truncation

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Search for multiple forms of a word

Music*Finds:MusicalMusicianMusiciansMusicalityMusic's

* ،؟، $،!،+

Wildcard

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Search by using the symbols ‘?’ and ‘*’ to replace individual letters

Useful if you are unsure of the spelling

Can be substituted for a character anywhere within the name, including the first letter

Entries in the field must contain a minimum of two characters, in addition to the wildcard

10 Step Of Your Search Strategy (1-5)

• Identify the important concepts of your search1. Important Concepts

• Choose the keywords that describe these concepts2. keywords

• Determine whether there are synonyms, related terms, or other variations of the keywords that should be included

3. Search Features

• Choose a search engine5. Search Engine

• Determine which search features may apply, including truncation, proximity operators, Boolean operators, and so forth..

4. Synonyms, Related Terms

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10 Step Of Your Search Strategy (6-10)

• Read the search instructions on the search engine's home page. Look for sections entitled "help," "advanced search," "frequently asked questions," and so forth

6. Help Section

• Create a search expression, using syntax, which is appropriate for the search engine

7. Search Expression

• Evaluate the results. How many hits were returned? Were the results relevant to your query?8. Evaluating

• Try the same search in a different search engine, following steps 5-9 above

10. Different Search Engine

• Modify your search if needed. Go back to steps 2-4 and revise your query accordingly9. Modifying

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Should you contact me at [email protected] for any comments or questions.Thank you

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mailto:[email protected]



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