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Internet Searching Version2

Internet Searching Version2



Internet Searching Training for ICIMOD staff 2005

Internet Searching Training for ICIMOD staff 2005



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    Internet Searching Version2 Internet Searching Version2 Presentation Transcript

    • ICT Capacity Building Internet Searching Deependra b. Tandukar, ICIMOD
    • Internet Searching
      • a comprehensive introduction to web searching methods and techniques
      • explains ways to find what you are actually looking for
    • Key Topics
      • Overview of the World Wide Web
      • Searching tools
      • Queries/Keywords
      • Tool selection
      • Power search
      • Evaluating the results
    • World Wide Web
      • Internet is an inter-connected network of networks – www is the web virtually linking these networks
      • most rely on Internet Searching for finding information
      • billions of web pages
      • at least a single page on your desired topic
    • Searching Tools
      • Web directories / Virtual Library
      • Search engines / Meta search engines
      • Deep web databases
    • Web Directories
      • repositories of useful web sites arranged into a hierarchical, subject-based structure
      • hand picked by the professionals and classified according to that particular direcotory service – hence limited to the subject/topic provided by the service
      • dir.yahoo.com, dmoz.org, dir.google.com
    • Virtual Library
      • web directory that includes highly selective links mostly by librarians
      • reviewed and evaluated by subject specialists for their accuracy and content
      • lii.org, ipl.org, vlib.org
    • Search Engines
      • index each document in its database
      • when a query is posed, it matches the query against the records it has, to present a list of possible documents
      • even the biggest search engines do not index all the Internet’s documents
      • google.com, yahoo.com, teoma.com
    • Metasearch Engines
      • send query simultaneously to several search engines, web directories and sometimes to the deep web
      • remove the duplicate links and combine the results into a single merged list
      • take only the top 10 or 20 from each search engine
      • dogpile.com, vivisimo.com
    • Deep Web Databases
      • invisible or hidden web databases
      • not linked to by other pages – dynamic pages
      • not indexed by standard search engines
      • completeplanet.com – over 70,000 searchable databases
      • http://elib.cs.berkeley.edu/ (digital library project – University of California, Berkeley)
    • Tool Selection
      • distinctive word or phrase – search engines
      • seek an overview – web directories
      • facts, maps, datas – deep web
      • switch from one tool to another
    • Phrase Searching
      • an effective way to increase the relevance of "hits" is to search as a phrase
      • “ internet training" is a different search than internet training in most search engines
    • Queries
      • finding information on the Internet depends on using the keywords precisely and the search services effectively
    • Keywords
      • fundamental aspects of a search
      • nouns most often
      • keep in mind the who , what , where , when , how and why in formulating the query
      • avoid articles , pronouns , conjunctions or prepositions – also called “stop words”
    • Power Search
      • overview of possible techniques
      • boolean search
      • field search
    • Boolean Search
      • boolean logic and set theory
      • simple to learn
      • adds tremendous effectiveness
      • boolean operators - AND , OR , and AND NOT
      • “ boolean logic” AND “George Boole”
    • AND
      • documents that contain all the words – dogs AND cats
      • narrows a search
      • can be used to chain a number of required terms or phrases – “sustainable development” AND mountain AND women
    • OR
      • documents that contain either word – dogs OR cats
      • broadens a search
      • use to include synonyms - tutorial OR guide
      • overuse can cause results sets to grow too large to be useful
    • AND NOT
      • BUT NOT or NOT and denoted by minus sign ( - )
      • removes any documents that contain the term or phrase immediately after – training NOT ICT or training –ICT (note: no space between “–” and ICT )
    • Other Operators
      • not supported by major search engines
      • all supported operators can be accessed via Advanced Search
    • Field Searching
      • used from Advanced Search
      • specify where to look your keyword in the web document – title, URL
    • Nesting
      • search engines may get confused if we use something like – "pan pizza" AND coke OR icecream AND cheese
      • but if we change to - "pan pizza" AND (coke OR icecream) AND cheese
    • Search Math
      • exact form of word
      • “ - ” excludes,
      • “ + ” requires
      • training –internet
      • training +internet
    • Evaluating the Results
      • anybody can publish on the web
      • check:
      • source – government agencies, eudcational institutions, libraries, prestigious publications/organisations
      • cross check other sources as well
      • updated date
      • use your logic
    • Thank You
      • there is no “ one ” way to search on the Internet