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Searching the Deep Web - PowerPoint

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					                              DEEP
  Ms. Greta E. Marlatt

Dudley                                    Naval
Knox Library   02/03/2011   Postgraduate School
                      Deep Web




Dudley                                                                  Naval
Knox Library                                              Postgraduate School
               http://www.coretalk.net/CubiconFirstRelease/index.htm
                   “Deep” or “Invisible” Web
 What is in it?
         •   “Stuff” that search engines can’t or won’t search
         •   Dynamically generated pages [cgi, asp, cfm, URL with ?]
               •   Weather, news, job postings, market prices, available airline flights etc.
         •   A lot of the real time data [stock quotes, weather, sports scores, election results etc]
         •   Web accessible or common theme databases that require information be typed in
               •   Laws, dictionaries, lists of professionals such as Drs or lawyers, calculators
         •   Certain file formats [e.g. PDF, images, streaming media, etc]
         •   Password or login required
         •   Commercial resources with domain or IP limitations
         •   Information residing on an Intranet
         •   Archives [newspapers]
         •   Thousands of specialized searchable databases
 How big is it?
         •   400-550 times larger than the surface web -- 7,500 terabytes vs. 19 terabytes [2000 est.]*
         •   900 billion pgs while search engines currently locate approximately 20 billion pgs [2008
             est.]**

                       *http://www.brightplanet.com/deepcontent/deep_web_faq.asp#DeepWebSize
                       ** http://www.llrx.com/features/deepweb2008.htm
      Dudley                                                                                    Naval
      Knox Library                                                                Postgraduate School
                    Deep Web




Dudley                                                               Naval
Knox Library                                           Postgraduate School
               http://www.searchlores.org/deepweb_searching.htm
Dudley                       Naval
Knox Library   Postgraduate School
Dudley                       Naval
Knox Library   Postgraduate School
Dudley                       Naval
Knox Library   Postgraduate School
           Why Use The Deep Web?
Quality of content/higher level of authority


Comprehensiveness


Focused

Timeliness


The material isn’t available elsewhere on the Web



Dudley                                                        Naval
Knox Library                                    Postgraduate School
    When To Use The Deep Web
Standard search engines aren’t working
A precise answer is needed

Data or statistics are needed
High quality or authoritative results are needed
When timeliness is important

You know the subject area well
Looking for collections [images, sounds, manuscripts etc.]

Reference books online [handbooks, guides, dictionaries,
        encyclopedias, directories etc.]

Dudley                                                      Naval
Knox Library                                  Postgraduate School
Strategies for Searching The Deep
                Web
 Have the mindset of a hunter, detective or passionate collector

 Use search engines to get to the front door
     Plane crash AND database
     Toxic chemicals AND database
     Lawyers AND directory

 Use the site map to see if databases or statistics
         are mentioned

 Use the site’s internal search tool and search for “database”

 Check subject specific discussion groups


Dudley                                                        Naval
Knox Library                                    Postgraduate School
                          What Tools To Use

WorldWideScience.org
         Global Science gateway to national and international
         scientific databases


OAIster [pronounced oyster]
         This is a union catalog of digital resources with over 25
         million open access collections from 1,100+ contributors.




Dudley                                                      Naval
Knox Library                                  Postgraduate School
               http://worldwidescience.org/

Dudley                                                      Naval
Knox Library                                  Postgraduate School
Dudley                               Naval
Knox Library           Postgraduate School
               http://oaister.worldcat.org/
                     What Tools To Use (2)

CompletePlanet
    •Largest Deep Web sites
Covers over 70,000 searchable databases and specialty Search
engines in areas such as:
        • Business
        • Engineering
        • Finance & Economics
        • Government
        • History
        • Military

Dudley                                                    Naval
Knox Library                                Postgraduate School
http://www.completeplanet.com/
                     What Tools To Use (3)

USA.Gov
        This is the official portal to all US Government
        information millions of federal and state web pages.
        U.S. Government telephone and E-mail directories

        Advanced search

        Image search




Dudley                                                      Naval
Knox Library                                  Postgraduate School
http://www.use.gov
                       What Tools To Use (4)

GPO ACCESS
        Multi-Database Search


DTIC Online
        Multi-Database Search


CiteSeer.IST
        Scientific literature digital library that focuses primarily on
        the literature in computer and information science.




Dudley                                                         Naval
Knox Library                                     Postgraduate School
Dudley                                                Naval
Knox Library   http://www.gpoaccess.gov/multidb.html School
                                         Postgraduate
http://citeseerx.ist.psu.edu/
                      What Tools To Use (5)
  Scirus
           This site concentrates on scientific, scholarly, technical
           and medical information and covers over 250 million
           science-specific Web pages. It searches both free and
           commercial journal sources.

 Thomas
           This site searches US congressional information
           including bills, committee reports & documents, treaties,
           the Congressional Record and more.

  International Relations and Security Network
           This site searches over 2,800 sites of interest to the
           international relations and security policy community.


Dudley                                                        Naval
Knox Library                                    Postgraduate School
Dudley                       Naval
Knox Library   Postgraduate School
http://thomas.loc.gov
                         What Tools To Use (6)

IncyWincy: The Invisible Web Search Engine
        Government
        Military


Infomine Multiple Database Search
        Infomine might be called an "academic" search engine, since
        it focuses on scholarly resource collections, electronic journals
        and books, online library card catalogs, and directories of
        researchers.
        Government Information




Dudley                                                          Naval
Knox Library                                      Postgraduate School
                     What Tools To Use (7)
FedStats
        This site is a gateway to statistics from over 100 U.S.
        Federal agencies.


Internet Public Library
        This site covers websites carefully collected, vetted and
        organized by librarians.




Dudley                                                          Naval
Knox Library                                      Postgraduate School
                       What Tools To Use (8)

 Navigating the Military Internet
         This page, while not a search tool per se, has a lot of good
         links to all kinds of military information. A related page
         Where to Find Military Information is also useful since it is
         organized by topic and leads to many databases
         containing military information. --




Dudley                                                       Naval
Knox Library                                   Postgraduate School
           Questions?


Dudley                            Naval
Knox Library        Postgraduate School
                           Exercises

   1) Find the Bureau of Labor Statistics (BLS) Inflation Calculator
    and discover what the buying power of $100 spend in 1948 would
    be today.

   2) Find a site that will allow you to see when the sun will be rising
    and setting in Monterey on June 13, 2009. Check Baghdad while
    you are there.


   3) Where would you go to find out who owns the Google
    trademark name and when they got it?




       Dudley                                                    Naval
       Knox Library                                Postgraduate School
                          Exercises

   4) Where would you go to find a map showing real time
    earthquake data?

   5) Where can you go to find the number and types of missiles
    China has transferred and to which countries since 1950?

   6) You’re getting ready to deploy to Japan, how can you find out
    what the Yen is currently worth according to the Feds?

   7) You recently inherited some savings bonds, where would you
    go to find out what their current value is?


      Dudley                                                  Naval
      Knox Library                              Postgraduate School
                     Exercise Answers

   1) BLS Consumer Price Index (CPI)
      Calculator

   2) U.S. Naval Observatory Sun Rise and Sun Set data

   3) US Patent and Trademark Office Trademark Electronic Search
    System (TESS)

   4) USGS Earthquake Website [with maps of recent activity]
      California and Nevada
      World



      Dudley                                                 Naval
      Knox Library                             Postgraduate School
                 Exercise Answers (2)

   5) SIPRI Arms Transfers Database



   6) Federal Reserve Board Foreign Exchange Rates [updated daily]



   7) Savings Bond Calculator




      Dudley                                                Naval
      Knox Library                            Postgraduate School

				
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